games/semicongine: semiconginev2/old/resources/lodepng.c annotate

annotate semiconginev2/old/resources/lodepng.c @ 1234:841e12f33c47

add: text & font rendering, not tested yet

author	sam <sam@basx.dev>
date	Sat, 20 Jul 2024 00:03:57 +0700
parents	56781cc0fc7c
children

rev	line source
840 44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2 LodePNG version 20230410
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4 Copyright (c) 2005-2023 Lode Vandevenne
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6 This software is provided 'as-is', without any express or implied
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	7 warranty. In no event will the authors be held liable for any damages
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	8 arising from the use of this software.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	9
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	10 Permission is granted to anyone to use this software for any purpose,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	11 including commercial applications, and to alter it and redistribute it
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	12 freely, subject to the following restrictions:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	13
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	14 1. The origin of this software must not be misrepresented; you must not
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	15 claim that you wrote the original software. If you use this software
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	16 in a product, an acknowledgment in the product documentation would be
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	17 appreciated but is not required.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	18
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	19 2. Altered source versions must be plainly marked as such, and must not be
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	20 misrepresented as being the original software.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	21
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	22 3. This notice may not be removed or altered from any source
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	23 distribution.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	24 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	25
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	26 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	27 The manual and changelog are in the header file "lodepng.h"
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	28 Rename this file to lodepng.cpp to use it for C++, or to lodepng.c to use it for C.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	29 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	30
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	31 #include "lodepng.h"
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	32
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	33 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	34 #include <limits.h> /* LONG_MAX */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	35 #include <stdio.h> /* file handling */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	36 #endif /* LODEPNG_COMPILE_DISK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	37
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	38 #ifdef LODEPNG_COMPILE_ALLOCATORS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	39 #include <stdlib.h> /* allocations */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	40 #endif /* LODEPNG_COMPILE_ALLOCATORS */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	41
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	42 #if defined(_MSC_VER) && (_MSC_VER >= 1310) /Visual Studio: A few warning types are not desired here./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	43 #pragma warning( disable : 4244 ) /implicit conversions: not warned by gcc -Wall -Wextra and requires too much casts/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	44 #pragma warning( disable : 4996 ) /VS does not like fopen, but fopen_s is not standard C so unusable here/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	45 #endif /_MSC_VER /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	46
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	47 const char* LODEPNG_VERSION_STRING = "20230410";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	48
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	49 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	50 This source file is divided into the following large parts. The code sections
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	51 with the "LODEPNG_COMPILE_" #defines divide this up further in an intermixed way.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	52 -Tools for C and common code for PNG and Zlib
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	53 -C Code for Zlib (huffman, deflate, ...)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	54 -C Code for PNG (file format chunks, adam7, PNG filters, color conversions, ...)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	55 -The C++ wrapper around all of the above
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	56 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	57
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	58 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	59 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	60 /* // Tools for C, and common code for PNG and Zlib. // */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	61 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	62 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	63
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	64 /*The malloc, realloc and free functions defined here with "lodepng_" in front
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	65 of the name, so that you can easily change them to others related to your
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	66 platform if needed. Everything else in the code calls these. Pass
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	67 -DLODEPNG_NO_COMPILE_ALLOCATORS to the compiler, or comment out
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	68 #define LODEPNG_COMPILE_ALLOCATORS in the header, to disable the ones here and
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	69 define them in your own project's source files without needing to change
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	70 lodepng source code. Don't forget to remove "static" if you copypaste them
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	71 from here.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	72
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	73 #ifdef LODEPNG_COMPILE_ALLOCATORS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	74 static void* lodepng_malloc(size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	75 #ifdef LODEPNG_MAX_ALLOC
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	76 if(size > LODEPNG_MAX_ALLOC) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	77 #endif
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	78 return malloc(size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	79 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	80
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	81 /* NOTE: when realloc returns NULL, it leaves the original memory untouched */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	82 static void* lodepng_realloc(void* ptr, size_t new_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	83 #ifdef LODEPNG_MAX_ALLOC
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	84 if(new_size > LODEPNG_MAX_ALLOC) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	85 #endif
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	86 return realloc(ptr, new_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	87 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	88
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	89 static void lodepng_free(void* ptr) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	90 free(ptr);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	91 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	92 #else /LODEPNG_COMPILE_ALLOCATORS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	93 /* TODO: support giving additional void* payload to the custom allocators */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	94 void* lodepng_malloc(size_t size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	95 void* lodepng_realloc(void* ptr, size_t new_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	96 void lodepng_free(void* ptr);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	97 #endif /LODEPNG_COMPILE_ALLOCATORS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	98
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	99 /* convince the compiler to inline a function, for use when this measurably improves performance */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	100 /* inline is not available in C90, but use it when supported by the compiler */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	101 #if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) \|\| (defined(__cplusplus) && (__cplusplus >= 199711L))
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	102 #define LODEPNG_INLINE inline
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	103 #else
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	104 #define LODEPNG_INLINE /* not available */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	105 #endif
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	106
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	107 /* restrict is not available in C90, but use it when supported by the compiler */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	108 #if (defined(__GNUC__) && (__GNUC__ > 3 \|\| (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))) \|\|\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	109 (defined(_MSC_VER) && (_MSC_VER >= 1400)) \|\| \
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	110 (defined(__WATCOMC__) && (__WATCOMC__ >= 1250) && !defined(__cplusplus))
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	111 #define LODEPNG_RESTRICT __restrict
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	112 #else
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	113 #define LODEPNG_RESTRICT /* not available */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	114 #endif
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	115
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	116 /* Replacements for C library functions such as memcpy and strlen, to support platforms
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	117 where a full C library is not available. The compiler can recognize them and compile
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	118 to something as fast. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	119
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	120 static void lodepng_memcpy(void* LODEPNG_RESTRICT dst,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	121 const void* LODEPNG_RESTRICT src, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	122 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	123 for(i = 0; i < size; i++) ((char)dst)[i] = ((const char)src)[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	124 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	125
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	126 static void lodepng_memset(void* LODEPNG_RESTRICT dst,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	127 int value, size_t num) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	128 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	129 for(i = 0; i < num; i++) ((char*)dst)[i] = (char)value;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	130 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	131
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	132 /* does not check memory out of bounds, do not use on untrusted data */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	133 static size_t lodepng_strlen(const char* a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	134 const char* orig = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	135 /* avoid warning about unused function in case of disabled COMPILE... macros */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	136 (void)(&lodepng_strlen);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	137 while(*a) a++;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	138 return (size_t)(a - orig);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	139 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	140
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	141 #define LODEPNG_MAX(a, b) (((a) > (b)) ? (a) : (b))
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	142 #define LODEPNG_MIN(a, b) (((a) < (b)) ? (a) : (b))
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	143
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	144 #if defined(LODEPNG_COMPILE_PNG) \|\| defined(LODEPNG_COMPILE_DECODER)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	145 /* Safely check if adding two integers will overflow (no undefined
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	146 behavior, compiler removing the code, etc...) and output result. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	147 static int lodepng_addofl(size_t a, size_t b, size_t* result) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	148 result = a + b; / Unsigned addition is well defined and safe in C90 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	149 return *result < a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	150 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	151 #endif /defined(LODEPNG_COMPILE_PNG) \|\| defined(LODEPNG_COMPILE_DECODER)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	152
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	153 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	154 /* Safely check if multiplying two integers will overflow (no undefined
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	155 behavior, compiler removing the code, etc...) and output result. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	156 static int lodepng_mulofl(size_t a, size_t b, size_t* result) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	157 result = a b; /* Unsigned multiplication is well defined and safe in C90 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	158 return (a != 0 && *result / a != b);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	159 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	160
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	161 #ifdef LODEPNG_COMPILE_ZLIB
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	162 /* Safely check if a + b > c, even if overflow could happen. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	163 static int lodepng_gtofl(size_t a, size_t b, size_t c) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	164 size_t d;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	165 if(lodepng_addofl(a, b, &d)) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	166 return d > c;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	167 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	168 #endif /LODEPNG_COMPILE_ZLIB/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	169 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	170
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	171
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	172 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	173 Often in case of an error a value is assigned to a variable and then it breaks
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	174 out of a loop (to go to the cleanup phase of a function). This macro does that.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	175 It makes the error handling code shorter and more readable.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	176
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	177 Example: if(!uivector_resize(&lz77_encoded, datasize)) ERROR_BREAK(83);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	178 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	179 #define CERROR_BREAK(errorvar, code){\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	180 errorvar = code;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	181 break;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	182 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	183
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	184 /version of CERROR_BREAK that assumes the common case where the error variable is named "error"/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	185 #define ERROR_BREAK(code) CERROR_BREAK(error, code)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	186
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	187 /Set error var to the error code, and return it./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	188 #define CERROR_RETURN_ERROR(errorvar, code){\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	189 errorvar = code;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	190 return code;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	191 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	192
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	193 /Try the code, if it returns error, also return the error./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	194 #define CERROR_TRY_RETURN(call){\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	195 unsigned error = call;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	196 if(error) return error;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	197 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	198
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	199 /Set error var to the error code, and return from the void function./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	200 #define CERROR_RETURN(errorvar, code){\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	201 errorvar = code;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	202 return;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	203 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	204
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	205 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	206 About uivector, ucvector and string:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	207 -All of them wrap dynamic arrays or text strings in a similar way.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	208 -LodePNG was originally written in C++. The vectors replace the std::vectors that were used in the C++ version.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	209 -The string tools are made to avoid problems with compilers that declare things like strncat as deprecated.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	210 -They're not used in the interface, only internally in this file as static functions.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	211 -As with many other structs in this file, the init and cleanup functions serve as ctor and dtor.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	212 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	213
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	214 #ifdef LODEPNG_COMPILE_ZLIB
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	215 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	216 /dynamic vector of unsigned ints/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	217 typedef struct uivector {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	218 unsigned* data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	219 size_t size; /size in number of unsigned longs/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	220 size_t allocsize; /allocated size in bytes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	221 } uivector;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	222
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	223 static void uivector_cleanup(void* p) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	224 ((uivector)p)->size = ((uivector)p)->allocsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	225 lodepng_free(((uivector*)p)->data);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	226 ((uivector*)p)->data = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	227 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	228
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	229 /returns 1 if success, 0 if failure ==> nothing done/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	230 static unsigned uivector_resize(uivector* p, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	231 size_t allocsize = size * sizeof(unsigned);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	232 if(allocsize > p->allocsize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	233 size_t newsize = allocsize + (p->allocsize >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	234 void* data = lodepng_realloc(p->data, newsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	235 if(data) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	236 p->allocsize = newsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	237 p->data = (unsigned*)data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	238 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	239 else return 0; /error: not enough memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	240 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	241 p->size = size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	242 return 1; /success/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	243 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	244
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	245 static void uivector_init(uivector* p) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	246 p->data = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	247 p->size = p->allocsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	248 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	249
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	250 /returns 1 if success, 0 if failure ==> nothing done/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	251 static unsigned uivector_push_back(uivector* p, unsigned c) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	252 if(!uivector_resize(p, p->size + 1)) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	253 p->data[p->size - 1] = c;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	254 return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	255 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	256 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	257 #endif /LODEPNG_COMPILE_ZLIB/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	258
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	259 /* /////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	260
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	261 /dynamic vector of unsigned chars/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	262 typedef struct ucvector {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	263 unsigned char* data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	264 size_t size; /used size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	265 size_t allocsize; /allocated size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	266 } ucvector;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	267
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	268 /returns 1 if success, 0 if failure ==> nothing done/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	269 static unsigned ucvector_reserve(ucvector* p, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	270 if(size > p->allocsize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	271 size_t newsize = size + (p->allocsize >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	272 void* data = lodepng_realloc(p->data, newsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	273 if(data) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	274 p->allocsize = newsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	275 p->data = (unsigned char*)data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	276 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	277 else return 0; /error: not enough memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	278 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	279 return 1; /success/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	280 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	281
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	282 /returns 1 if success, 0 if failure ==> nothing done/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	283 static unsigned ucvector_resize(ucvector* p, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	284 p->size = size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	285 return ucvector_reserve(p, size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	286 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	287
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	288 static ucvector ucvector_init(unsigned char* buffer, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	289 ucvector v;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	290 v.data = buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	291 v.allocsize = v.size = size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	292 return v;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	293 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	294
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	295 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	296
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	297 #ifdef LODEPNG_COMPILE_PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	298 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	299
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	300 /free string pointer and set it to NULL/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	301 static void string_cleanup(char** out) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	302 lodepng_free(*out);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	303 *out = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	304 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	305
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	306 /also appends null termination character/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	307 static char* alloc_string_sized(const char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	308 char* out = (char*)lodepng_malloc(insize + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	309 if(out) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	310 lodepng_memcpy(out, in, insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	311 out[insize] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	312 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	313 return out;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	314 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	315
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	316 /* dynamically allocates a new string with a copy of the null terminated input text */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	317 static char* alloc_string(const char* in) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	318 return alloc_string_sized(in, lodepng_strlen(in));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	319 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	320 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	321 #endif /LODEPNG_COMPILE_PNG/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	322
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	323 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	324
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	325 #if defined(LODEPNG_COMPILE_DECODER) \|\| defined(LODEPNG_COMPILE_PNG)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	326 static unsigned lodepng_read32bitInt(const unsigned char* buffer) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	327 return (((unsigned)buffer[0] << 24u) \| ((unsigned)buffer[1] << 16u) \|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	328 ((unsigned)buffer[2] << 8u) \| (unsigned)buffer[3]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	329 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	330 #endif /defined(LODEPNG_COMPILE_DECODER) \|\| defined(LODEPNG_COMPILE_PNG)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	331
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	332 #if defined(LODEPNG_COMPILE_PNG) \|\| defined(LODEPNG_COMPILE_ENCODER)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	333 /buffer must have at least 4 allocated bytes available/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	334 static void lodepng_set32bitInt(unsigned char* buffer, unsigned value) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	335 buffer[0] = (unsigned char)((value >> 24) & 0xff);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	336 buffer[1] = (unsigned char)((value >> 16) & 0xff);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	337 buffer[2] = (unsigned char)((value >> 8) & 0xff);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	338 buffer[3] = (unsigned char)((value ) & 0xff);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	339 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	340 #endif /defined(LODEPNG_COMPILE_PNG) \|\| defined(LODEPNG_COMPILE_ENCODER)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	341
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	342 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	343 /* / File IO / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	344 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	345
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	346 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	347
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	348 /* returns negative value on error. This should be pure C compatible, so no fstat. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	349 static long lodepng_filesize(const char* filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	350 FILE* file;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	351 long size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	352 file = fopen(filename, "rb");
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	353 if(!file) return -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	354
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	355 if(fseek(file, 0, SEEK_END) != 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	356 fclose(file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	357 return -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	358 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	359
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	360 size = ftell(file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	361 /* It may give LONG_MAX as directory size, this is invalid for us. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	362 if(size == LONG_MAX) size = -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	363
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	364 fclose(file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	365 return size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	366 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	367
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	368 /* load file into buffer that already has the correct allocated size. Returns error code.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	369 static unsigned lodepng_buffer_file(unsigned char* out, size_t size, const char* filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	370 FILE* file;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	371 size_t readsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	372 file = fopen(filename, "rb");
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	373 if(!file) return 78;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	374
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	375 readsize = fread(out, 1, size, file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	376 fclose(file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	377
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	378 if(readsize != size) return 78;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	379 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	380 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	381
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	382 unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	383 long size = lodepng_filesize(filename);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	384 if(size < 0) return 78;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	385 *outsize = (size_t)size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	386
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	387 out = (unsigned char)lodepng_malloc((size_t)size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	388 if(!(out) && size > 0) return 83; /the above malloc failed*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	389
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	390 return lodepng_buffer_file(*out, (size_t)size, filename);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	391 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	392
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	393 /write given buffer to the file, overwriting the file, it doesn't append to it./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	394 unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	395 FILE* file;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	396 file = fopen(filename, "wb" );
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	397 if(!file) return 79;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	398 fwrite(buffer, 1, buffersize, file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	399 fclose(file);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	400 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	401 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	402
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	403 #endif /LODEPNG_COMPILE_DISK/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	404
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	405 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	406 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	407 /* // End of common code and tools. Begin of Zlib related code. // */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	408 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	409 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	410
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	411 #ifdef LODEPNG_COMPILE_ZLIB
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	412 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	413
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	414 typedef struct {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	415 ucvector* data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	416 unsigned char bp; /ok to overflow, indicates bit pos inside byte/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	417 } LodePNGBitWriter;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	418
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	419 static void LodePNGBitWriter_init(LodePNGBitWriter* writer, ucvector* data) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	420 writer->data = data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	421 writer->bp = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	422 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	423
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	424 /TODO: this ignores potential out of memory errors/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	425 #define WRITEBIT(writer, bit){\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	426 /* append new byte */\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	427 if(((writer->bp) & 7u) == 0) {\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	428 if(!ucvector_resize(writer->data, writer->data->size + 1)) return;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	429 writer->data->data[writer->data->size - 1] = 0;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	430 }\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	431 (writer->data->data[writer->data->size - 1]) \|= (bit << ((writer->bp) & 7u));\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	432 ++writer->bp;\
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	433 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	434
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	435 /* LSB of value is written first, and LSB of bytes is used first */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	436 static void writeBits(LodePNGBitWriter* writer, unsigned value, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	437 if(nbits == 1) { /* compiler should statically compile this case if nbits == 1 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	438 WRITEBIT(writer, value);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	439 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	440 /* TODO: increase output size only once here rather than in each WRITEBIT */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	441 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	442 for(i = 0; i != nbits; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	443 WRITEBIT(writer, (unsigned char)((value >> i) & 1));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	444 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	445 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	446 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	447
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	448 /* This one is to use for adding huffman symbol, the value bits are written MSB first */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	449 static void writeBitsReversed(LodePNGBitWriter* writer, unsigned value, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	450 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	451 for(i = 0; i != nbits; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	452 /* TODO: increase output size only once here rather than in each WRITEBIT */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	453 WRITEBIT(writer, (unsigned char)((value >> (nbits - 1u - i)) & 1u));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	454 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	455 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	456 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	457
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	458 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	459
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	460 typedef struct {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	461 const unsigned char* data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	462 size_t size; /size of data in bytes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	463 size_t bitsize; /size of data in bits, end of valid bp values, should be 8size*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	464 size_t bp;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	465 unsigned buffer; /buffer for reading bits. NOTE: 'unsigned' must support at least 32 bits/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	466 } LodePNGBitReader;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	467
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	468 /* data size argument is in bytes. Returns error if size too large causing overflow */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	469 static unsigned LodePNGBitReader_init(LodePNGBitReader* reader, const unsigned char* data, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	470 size_t temp;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	471 reader->data = data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	472 reader->size = size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	473 /* size in bits, return error if overflow (if size_t is 32 bit this supports up to 500MB) */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	474 if(lodepng_mulofl(size, 8u, &reader->bitsize)) return 105;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	475 /*ensure incremented bp can be compared to bitsize without overflow even when it would be incremented 32 too much and
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	476 trying to ensure 32 more bits*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	477 if(lodepng_addofl(reader->bitsize, 64u, &temp)) return 105;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	478 reader->bp = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	479 reader->buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	480 return 0; /ok/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	481 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	482
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	483 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	484 ensureBits functions:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	485 Ensures the reader can at least read nbits bits in one or more readBits calls,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	486 safely even if not enough bits are available.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	487 The nbits parameter is unused but is given for documentation purposes, error
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	488 checking for amount of bits must be done beforehand.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	489 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	490
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	491 /See ensureBits documentation above. This one ensures up to 9 bits /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	492 static LODEPNG_INLINE void ensureBits9(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	493 size_t start = reader->bp >> 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	494 size_t size = reader->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	495 if(start + 1u < size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	496 reader->buffer = (unsigned)reader->data[start + 0] \| ((unsigned)reader->data[start + 1] << 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	497 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	498 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	499 reader->buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	500 if(start + 0u < size) reader->buffer = reader->data[start + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	501 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	502 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	503 (void)nbits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	504 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	505
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	506 /See ensureBits documentation above. This one ensures up to 17 bits /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	507 static LODEPNG_INLINE void ensureBits17(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	508 size_t start = reader->bp >> 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	509 size_t size = reader->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	510 if(start + 2u < size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	511 reader->buffer = (unsigned)reader->data[start + 0] \| ((unsigned)reader->data[start + 1] << 8u) \|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	512 ((unsigned)reader->data[start + 2] << 16u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	513 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	514 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	515 reader->buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	516 if(start + 0u < size) reader->buffer \|= reader->data[start + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	517 if(start + 1u < size) reader->buffer \|= ((unsigned)reader->data[start + 1] << 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	518 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	519 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	520 (void)nbits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	521 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	522
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	523 /See ensureBits documentation above. This one ensures up to 25 bits /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	524 static LODEPNG_INLINE void ensureBits25(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	525 size_t start = reader->bp >> 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	526 size_t size = reader->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	527 if(start + 3u < size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	528 reader->buffer = (unsigned)reader->data[start + 0] \| ((unsigned)reader->data[start + 1] << 8u) \|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	529 ((unsigned)reader->data[start + 2] << 16u) \| ((unsigned)reader->data[start + 3] << 24u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	530 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	531 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	532 reader->buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	533 if(start + 0u < size) reader->buffer \|= reader->data[start + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	534 if(start + 1u < size) reader->buffer \|= ((unsigned)reader->data[start + 1] << 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	535 if(start + 2u < size) reader->buffer \|= ((unsigned)reader->data[start + 2] << 16u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	536 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	537 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	538 (void)nbits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	539 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	540
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	541 /See ensureBits documentation above. This one ensures up to 32 bits /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	542 static LODEPNG_INLINE void ensureBits32(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	543 size_t start = reader->bp >> 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	544 size_t size = reader->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	545 if(start + 4u < size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	546 reader->buffer = (unsigned)reader->data[start + 0] \| ((unsigned)reader->data[start + 1] << 8u) \|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	547 ((unsigned)reader->data[start + 2] << 16u) \| ((unsigned)reader->data[start + 3] << 24u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	548 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	549 reader->buffer \|= (((unsigned)reader->data[start + 4] << 24u) << (8u - (reader->bp & 7u)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	550 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	551 reader->buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	552 if(start + 0u < size) reader->buffer \|= reader->data[start + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	553 if(start + 1u < size) reader->buffer \|= ((unsigned)reader->data[start + 1] << 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	554 if(start + 2u < size) reader->buffer \|= ((unsigned)reader->data[start + 2] << 16u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	555 if(start + 3u < size) reader->buffer \|= ((unsigned)reader->data[start + 3] << 24u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	556 reader->buffer >>= (reader->bp & 7u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	557 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	558 (void)nbits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	559 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	560
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	561 /* Get bits without advancing the bit pointer. Must have enough bits available with ensureBits. Max nbits is 31. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	562 static LODEPNG_INLINE unsigned peekBits(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	563 /* The shift allows nbits to be only up to 31. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	564 return reader->buffer & ((1u << nbits) - 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	565 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	566
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	567 /* Must have enough bits available with ensureBits */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	568 static LODEPNG_INLINE void advanceBits(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	569 reader->buffer >>= nbits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	570 reader->bp += nbits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	571 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	572
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	573 /* Must have enough bits available with ensureBits */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	574 static LODEPNG_INLINE unsigned readBits(LodePNGBitReader* reader, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	575 unsigned result = peekBits(reader, nbits);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	576 advanceBits(reader, nbits);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	577 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	578 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	579 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	580
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	581 static unsigned reverseBits(unsigned bits, unsigned num) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	582 /TODO: implement faster lookup table based version when needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	583 unsigned i, result = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	584 for(i = 0; i < num; i++) result \|= ((bits >> (num - i - 1u)) & 1u) << i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	585 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	586 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	587
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	588 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	589 /* / Deflate - Huffman / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	590 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	591
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	592 #define FIRST_LENGTH_CODE_INDEX 257
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	593 #define LAST_LENGTH_CODE_INDEX 285
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	594 /256 literals, the end code, some length codes, and 2 unused codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	595 #define NUM_DEFLATE_CODE_SYMBOLS 288
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	596 /the distance codes have their own symbols, 30 used, 2 unused/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	597 #define NUM_DISTANCE_SYMBOLS 32
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	598 /the code length codes. 0-15: code lengths, 16: copy previous 3-6 times, 17: 3-10 zeros, 18: 11-138 zeros/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	599 #define NUM_CODE_LENGTH_CODES 19
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	600
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	601 /the base lengths represented by codes 257-285/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	602 static const unsigned LENGTHBASE[29]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	603 = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	604 67, 83, 99, 115, 131, 163, 195, 227, 258};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	605
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	606 /the extra bits used by codes 257-285 (added to base length)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	607 static const unsigned LENGTHEXTRA[29]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	608 = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	609 4, 4, 4, 4, 5, 5, 5, 5, 0};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	610
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	611 /the base backwards distances (the bits of distance codes appear after length codes and use their own huffman tree)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	612 static const unsigned DISTANCEBASE[30]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	613 = {1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	614 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	615
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	616 /the extra bits of backwards distances (added to base)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	617 static const unsigned DISTANCEEXTRA[30]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	618 = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	619 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	620
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	621 /*the order in which "code length alphabet code lengths" are stored as specified by deflate, out of this the huffman
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	622 tree of the dynamic huffman tree lengths is generated*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	623 static const unsigned CLCL_ORDER[NUM_CODE_LENGTH_CODES]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	624 = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	625
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	626 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	627
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	628 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	629 Huffman tree struct, containing multiple representations of the tree
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	630 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	631 typedef struct HuffmanTree {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	632 unsigned* codes; /the huffman codes (bit patterns representing the symbols)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	633 unsigned* lengths; /the lengths of the huffman codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	634 unsigned maxbitlen; /maximum number of bits a single code can get/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	635 unsigned numcodes; /number of symbols in the alphabet = number of codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	636 /* for reading only */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	637 unsigned char* table_len; /length of symbol from lookup table, or max length if secondary lookup needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	638 unsigned short* table_value; /value of symbol from lookup table, or pointer to secondary table if needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	639 } HuffmanTree;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	640
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	641 static void HuffmanTree_init(HuffmanTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	642 tree->codes = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	643 tree->lengths = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	644 tree->table_len = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	645 tree->table_value = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	646 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	647
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	648 static void HuffmanTree_cleanup(HuffmanTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	649 lodepng_free(tree->codes);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	650 lodepng_free(tree->lengths);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	651 lodepng_free(tree->table_len);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	652 lodepng_free(tree->table_value);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	653 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	654
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	655 /* amount of bits for first huffman table lookup (aka root bits), see HuffmanTree_makeTable and huffmanDecodeSymbol.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	656 /* values 8u and 9u work the fastest */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	657 #define FIRSTBITS 9u
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	658
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	659 /* a symbol value too big to represent any valid symbol, to indicate reading disallowed huffman bits combination,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	660 which is possible in case of only 0 or 1 present symbols. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	661 #define INVALIDSYMBOL 65535u
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	662
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	663 /* make table for huffman decoding */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	664 static unsigned HuffmanTree_makeTable(HuffmanTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	665 static const unsigned headsize = 1u << FIRSTBITS; /size of the first table/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	666 static const unsigned mask = (1u << FIRSTBITS) /headsize/ - 1u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	667 size_t i, numpresent, pointer, size; /total table size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	668 unsigned* maxlens = (unsigned)lodepng_malloc(headsize sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	669 if(!maxlens) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	670
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	671 /* compute maxlens: max total bit length of symbols sharing prefix in the first table*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	672 lodepng_memset(maxlens, 0, headsize * sizeof(*maxlens));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	673 for(i = 0; i < tree->numcodes; i++) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	674 unsigned symbol = tree->codes[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	675 unsigned l = tree->lengths[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	676 unsigned index;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	677 if(l <= FIRSTBITS) continue; /symbols that fit in first table don't increase secondary table size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	678 /get the FIRSTBITS MSBs, the MSBs of the symbol are encoded first. See later comment about the reversing/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	679 index = reverseBits(symbol >> (l - FIRSTBITS), FIRSTBITS);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	680 maxlens[index] = LODEPNG_MAX(maxlens[index], l);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	681 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	682 /* compute total table size: size of first table plus all secondary tables for symbols longer than FIRSTBITS */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	683 size = headsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	684 for(i = 0; i < headsize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	685 unsigned l = maxlens[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	686 if(l > FIRSTBITS) size += (1u << (l - FIRSTBITS));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	687 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	688 tree->table_len = (unsigned char)lodepng_malloc(size sizeof(*tree->table_len));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	689 tree->table_value = (unsigned short)lodepng_malloc(size sizeof(*tree->table_value));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	690 if(!tree->table_len \|\| !tree->table_value) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	691 lodepng_free(maxlens);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	692 /* freeing tree->table values is done at a higher scope */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	693 return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	694 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	695 /initialize with an invalid length to indicate unused entries/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	696 for(i = 0; i < size; ++i) tree->table_len[i] = 16;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	697
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	698 /fill in the first table for long symbols: max prefix size and pointer to secondary tables/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	699 pointer = headsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	700 for(i = 0; i < headsize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	701 unsigned l = maxlens[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	702 if(l <= FIRSTBITS) continue;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	703 tree->table_len[i] = l;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	704 tree->table_value[i] = pointer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	705 pointer += (1u << (l - FIRSTBITS));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	706 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	707 lodepng_free(maxlens);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	708
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	709 /fill in the first table for short symbols, or secondary table for long symbols/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	710 numpresent = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	711 for(i = 0; i < tree->numcodes; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	712 unsigned l = tree->lengths[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	713 unsigned symbol, reverse;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	714 if(l == 0) continue;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	715 symbol = tree->codes[i]; /the huffman bit pattern. i itself is the value./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	716 /reverse bits, because the huffman bits are given in MSB first order but the bit reader reads LSB first/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	717 reverse = reverseBits(symbol, l);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	718 numpresent++;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	719
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	720 if(l <= FIRSTBITS) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	721 /short symbol, fully in first table, replicated num times if l < FIRSTBITS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	722 unsigned num = 1u << (FIRSTBITS - l);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	723 unsigned j;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	724 for(j = 0; j < num; ++j) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	725 /bit reader will read the l bits of symbol first, the remaining FIRSTBITS - l bits go to the MSB's/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	726 unsigned index = reverse \| (j << l);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	727 if(tree->table_len[index] != 16) return 55; /invalid tree: long symbol shares prefix with short symbol/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	728 tree->table_len[index] = l;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	729 tree->table_value[index] = i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	730 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	731 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	732 /long symbol, shares prefix with other long symbols in first lookup table, needs second lookup/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	733 /the FIRSTBITS MSBs of the symbol are the first table index/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	734 unsigned index = reverse & mask;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	735 unsigned maxlen = tree->table_len[index];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	736 /log2 of secondary table length, should be >= l - FIRSTBITS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	737 unsigned tablelen = maxlen - FIRSTBITS;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	738 unsigned start = tree->table_value[index]; /starting index in secondary table/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	739 unsigned num = 1u << (tablelen - (l - FIRSTBITS)); /amount of entries of this symbol in secondary table/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	740 unsigned j;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	741 if(maxlen < l) return 55; /invalid tree: long symbol shares prefix with short symbol/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	742 for(j = 0; j < num; ++j) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	743 unsigned reverse2 = reverse >> FIRSTBITS; /* l - FIRSTBITS bits */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	744 unsigned index2 = start + (reverse2 \| (j << (l - FIRSTBITS)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	745 tree->table_len[index2] = l;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	746 tree->table_value[index2] = i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	747 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	748 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	749 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	750
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	751 if(numpresent < 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	752 /* In case of exactly 1 symbol, in theory the huffman symbol needs 0 bits,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	753 but deflate uses 1 bit instead. In case of 0 symbols, no symbols can
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	754 appear at all, but such huffman tree could still exist (e.g. if distance
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	755 codes are never used). In both cases, not all symbols of the table will be
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	756 filled in. Fill them in with an invalid symbol value so returning them from
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	757 huffmanDecodeSymbol will cause error. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	758 for(i = 0; i < size; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	759 if(tree->table_len[i] == 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	760 /* As length, use a value smaller than FIRSTBITS for the head table,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	761 and a value larger than FIRSTBITS for the secondary table, to ensure
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	762 valid behavior for advanceBits when reading this symbol. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	763 tree->table_len[i] = (i < headsize) ? 1 : (FIRSTBITS + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	764 tree->table_value[i] = INVALIDSYMBOL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	765 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	766 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	767 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	768 /* A good huffman tree has N * 2 - 1 nodes, of which N - 1 are internal nodes.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	769 If that is not the case (due to too long length codes), the table will not
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	770 have been fully used, and this is an error (not all bit combinations can be
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	771 decoded): an oversubscribed huffman tree, indicated by error 55. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	772 for(i = 0; i < size; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	773 if(tree->table_len[i] == 16) return 55;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	774 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	775 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	776
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	777 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	778 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	779
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	780 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	781 Second step for the ...makeFromLengths and ...makeFromFrequencies functions.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	782 numcodes, lengths and maxbitlen must already be filled in correctly. return
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	783 value is error.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	784 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	785 static unsigned HuffmanTree_makeFromLengths2(HuffmanTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	786 unsigned* blcount;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	787 unsigned* nextcode;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	788 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	789 unsigned bits, n;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	790
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	791 tree->codes = (unsigned)lodepng_malloc(tree->numcodes sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	792 blcount = (unsigned)lodepng_malloc((tree->maxbitlen + 1) sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	793 nextcode = (unsigned)lodepng_malloc((tree->maxbitlen + 1) sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	794 if(!tree->codes \|\| !blcount \|\| !nextcode) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	795
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	796 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	797 for(n = 0; n != tree->maxbitlen + 1; n++) blcount[n] = nextcode[n] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	798 /step 1: count number of instances of each code length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	799 for(bits = 0; bits != tree->numcodes; ++bits) ++blcount[tree->lengths[bits]];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	800 /step 2: generate the nextcode values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	801 for(bits = 1; bits <= tree->maxbitlen; ++bits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	802 nextcode[bits] = (nextcode[bits - 1] + blcount[bits - 1]) << 1u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	803 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	804 /step 3: generate all the codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	805 for(n = 0; n != tree->numcodes; ++n) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	806 if(tree->lengths[n] != 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	807 tree->codes[n] = nextcode[tree->lengths[n]]++;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	808 /remove superfluous bits from the code/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	809 tree->codes[n] &= ((1u << tree->lengths[n]) - 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	810 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	811 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	812 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	813
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	814 lodepng_free(blcount);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	815 lodepng_free(nextcode);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	816
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	817 if(!error) error = HuffmanTree_makeTable(tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	818 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	819 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	820
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	821 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	822 given the code lengths (as stored in the PNG file), generate the tree as defined
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	823 by Deflate. maxbitlen is the maximum bits that a code in the tree can have.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	824 return value is error.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	825 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	826 static unsigned HuffmanTree_makeFromLengths(HuffmanTree* tree, const unsigned* bitlen,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	827 size_t numcodes, unsigned maxbitlen) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	828 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	829 tree->lengths = (unsigned)lodepng_malloc(numcodes sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	830 if(!tree->lengths) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	831 for(i = 0; i != numcodes; ++i) tree->lengths[i] = bitlen[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	832 tree->numcodes = (unsigned)numcodes; /number of symbols/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	833 tree->maxbitlen = maxbitlen;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	834 return HuffmanTree_makeFromLengths2(tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	835 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	836
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	837 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	838
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	839 /*BPM: Boundary Package Merge, see "A Fast and Space-Economical Algorithm for Length-Limited Coding",
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	840 Jyrki Katajainen, Alistair Moffat, Andrew Turpin, 1995.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	841
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	842 /chain node for boundary package merge/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	843 typedef struct BPMNode {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	844 int weight; /the sum of all weights in this chain/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	845 unsigned index; /index of this leaf node (called "count" in the paper)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	846 struct BPMNode* tail; /the next nodes in this chain (null if last)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	847 int in_use;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	848 } BPMNode;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	849
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	850 /lists of chains/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	851 typedef struct BPMLists {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	852 /memory pool/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	853 unsigned memsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	854 BPMNode* memory;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	855 unsigned numfree;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	856 unsigned nextfree;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	857 BPMNode** freelist;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	858 /two heads of lookahead chains per list/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	859 unsigned listsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	860 BPMNode** chains0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	861 BPMNode** chains1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	862 } BPMLists;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	863
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	864 /creates a new chain node with the given parameters, from the memory in the lists /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	865 static BPMNode* bpmnode_create(BPMLists* lists, int weight, unsigned index, BPMNode* tail) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	866 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	867 BPMNode* result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	868
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	869 /memory full, so garbage collect/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	870 if(lists->nextfree >= lists->numfree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	871 /mark only those that are in use/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	872 for(i = 0; i != lists->memsize; ++i) lists->memory[i].in_use = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	873 for(i = 0; i != lists->listsize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	874 BPMNode* node;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	875 for(node = lists->chains0[i]; node != 0; node = node->tail) node->in_use = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	876 for(node = lists->chains1[i]; node != 0; node = node->tail) node->in_use = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	877 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	878 /collect those that are free/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	879 lists->numfree = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	880 for(i = 0; i != lists->memsize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	881 if(!lists->memory[i].in_use) lists->freelist[lists->numfree++] = &lists->memory[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	882 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	883 lists->nextfree = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	884 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	885
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	886 result = lists->freelist[lists->nextfree++];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	887 result->weight = weight;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	888 result->index = index;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	889 result->tail = tail;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	890 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	891 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	892
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	893 /sort the leaves with stable mergesort/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	894 static void bpmnode_sort(BPMNode* leaves, size_t num) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	895 BPMNode* mem = (BPMNode)lodepng_malloc(sizeof(leaves) * num);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	896 size_t width, counter = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	897 for(width = 1; width < num; width *= 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	898 BPMNode* a = (counter & 1) ? mem : leaves;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	899 BPMNode* b = (counter & 1) ? leaves : mem;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	900 size_t p;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	901 for(p = 0; p < num; p += 2 * width) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	902 size_t q = (p + width > num) ? num : (p + width);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	903 size_t r = (p + 2 * width > num) ? num : (p + 2 * width);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	904 size_t i = p, j = q, k;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	905 for(k = p; k < r; k++) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	906 if(i < q && (j >= r \|\| a[i].weight <= a[j].weight)) b[k] = a[i++];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	907 else b[k] = a[j++];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	908 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	909 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	910 counter++;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	911 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	912 if(counter & 1) lodepng_memcpy(leaves, mem, sizeof(leaves) num);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	913 lodepng_free(mem);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	914 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	915
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	916 /Boundary Package Merge step, numpresent is the amount of leaves, and c is the current chain./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	917 static void boundaryPM(BPMLists* lists, BPMNode* leaves, size_t numpresent, int c, int num) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	918 unsigned lastindex = lists->chains1[c]->index;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	919
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	920 if(c == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	921 if(lastindex >= numpresent) return;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	922 lists->chains0[c] = lists->chains1[c];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	923 lists->chains1[c] = bpmnode_create(lists, leaves[lastindex].weight, lastindex + 1, 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	924 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	925 /sum of the weights of the head nodes of the previous lookahead chains./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	926 int sum = lists->chains0[c - 1]->weight + lists->chains1[c - 1]->weight;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	927 lists->chains0[c] = lists->chains1[c];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	928 if(lastindex < numpresent && sum > leaves[lastindex].weight) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	929 lists->chains1[c] = bpmnode_create(lists, leaves[lastindex].weight, lastindex + 1, lists->chains1[c]->tail);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	930 return;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	931 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	932 lists->chains1[c] = bpmnode_create(lists, sum, lastindex, lists->chains1[c - 1]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	933 /*in the end we are only interested in the chain of the last list, so no
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	934 need to recurse if we're at the last one (this gives measurable speedup)*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	935 if(num + 1 < (int)(2 * numpresent - 2)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	936 boundaryPM(lists, leaves, numpresent, c - 1, num);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	937 boundaryPM(lists, leaves, numpresent, c - 1, num);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	938 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	939 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	940 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	941
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	942 unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	943 size_t numcodes, unsigned maxbitlen) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	944 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	945 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	946 size_t numpresent = 0; /number of symbols with non-zero frequency/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	947 BPMNode* leaves; /the symbols, only those with > 0 frequency/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	948
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	949 if(numcodes == 0) return 80; /error: a tree of 0 symbols is not supposed to be made/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	950 if((1u << maxbitlen) < (unsigned)numcodes) return 80; /error: represent all symbols/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	951
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	952 leaves = (BPMNode)lodepng_malloc(numcodes sizeof(*leaves));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	953 if(!leaves) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	954
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	955 for(i = 0; i != numcodes; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	956 if(frequencies[i] > 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	957 leaves[numpresent].weight = (int)frequencies[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	958 leaves[numpresent].index = i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	959 ++numpresent;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	960 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	961 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	962
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	963 lodepng_memset(lengths, 0, numcodes * sizeof(*lengths));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	964
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	965 /*ensure at least two present symbols. There should be at least one symbol
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	966 according to RFC 1951 section 3.2.7. Some decoders incorrectly require two. To
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	967 make these work as well ensure there are at least two symbols. The
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	968 Package-Merge code below also doesn't work correctly if there's only one
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	969 symbol, it'd give it the theoretical 0 bits but in practice zlib wants 1 bit*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	970 if(numpresent == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	971 lengths[0] = lengths[1] = 1; /note that for RFC 1951 section 3.2.7, only lengths[0] = 1 is needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	972 } else if(numpresent == 1) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	973 lengths[leaves[0].index] = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	974 lengths[leaves[0].index == 0 ? 1 : 0] = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	975 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	976 BPMLists lists;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	977 BPMNode* node;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	978
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	979 bpmnode_sort(leaves, numpresent);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	980
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	981 lists.listsize = maxbitlen;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	982 lists.memsize = 2 * maxbitlen * (maxbitlen + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	983 lists.nextfree = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	984 lists.numfree = lists.memsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	985 lists.memory = (BPMNode)lodepng_malloc(lists.memsize sizeof(*lists.memory));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	986 lists.freelist = (BPMNode*)lodepng_malloc(lists.memsize sizeof(BPMNode*));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	987 lists.chains0 = (BPMNode*)lodepng_malloc(lists.listsize sizeof(BPMNode*));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	988 lists.chains1 = (BPMNode*)lodepng_malloc(lists.listsize sizeof(BPMNode*));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	989 if(!lists.memory \|\| !lists.freelist \|\| !lists.chains0 \|\| !lists.chains1) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	990
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	991 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	992 for(i = 0; i != lists.memsize; ++i) lists.freelist[i] = &lists.memory[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	993
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	994 bpmnode_create(&lists, leaves[0].weight, 1, 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	995 bpmnode_create(&lists, leaves[1].weight, 2, 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	996
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	997 for(i = 0; i != lists.listsize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	998 lists.chains0[i] = &lists.memory[0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	999 lists.chains1[i] = &lists.memory[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1000 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1001
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1002 /each boundaryPM call adds one chain to the last list, and we need 2 numpresent - 2 chains.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1003 for(i = 2; i != 2 * numpresent - 2; ++i) boundaryPM(&lists, leaves, numpresent, (int)maxbitlen - 1, (int)i);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1004
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1005 for(node = lists.chains1[maxbitlen - 1]; node; node = node->tail) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1006 for(i = 0; i != node->index; ++i) ++lengths[leaves[i].index];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1007 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1008 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1009
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1010 lodepng_free(lists.memory);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1011 lodepng_free(lists.freelist);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1012 lodepng_free(lists.chains0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1013 lodepng_free(lists.chains1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1014 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1015
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1016 lodepng_free(leaves);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1017 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1018 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1019
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1020 /Create the Huffman tree given the symbol frequencies/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1021 static unsigned HuffmanTree_makeFromFrequencies(HuffmanTree* tree, const unsigned* frequencies,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1022 size_t mincodes, size_t numcodes, unsigned maxbitlen) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1023 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1024 while(!frequencies[numcodes - 1] && numcodes > mincodes) --numcodes; /trim zeroes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1025 tree->lengths = (unsigned)lodepng_malloc(numcodes sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1026 if(!tree->lengths) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1027 tree->maxbitlen = maxbitlen;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1028 tree->numcodes = (unsigned)numcodes; /number of symbols/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1029
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1030 error = lodepng_huffman_code_lengths(tree->lengths, frequencies, numcodes, maxbitlen);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1031 if(!error) error = HuffmanTree_makeFromLengths2(tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1032 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1033 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1034 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1035
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1036 /get the literal and length code tree of a deflated block with fixed tree, as per the deflate specification/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1037 static unsigned generateFixedLitLenTree(HuffmanTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1038 unsigned i, error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1039 unsigned* bitlen = (unsigned)lodepng_malloc(NUM_DEFLATE_CODE_SYMBOLS sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1040 if(!bitlen) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1041
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1042 /288 possible codes: 0-255=literals, 256=endcode, 257-285=lengthcodes, 286-287=unused/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1043 for(i = 0; i <= 143; ++i) bitlen[i] = 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1044 for(i = 144; i <= 255; ++i) bitlen[i] = 9;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1045 for(i = 256; i <= 279; ++i) bitlen[i] = 7;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1046 for(i = 280; i <= 287; ++i) bitlen[i] = 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1047
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1048 error = HuffmanTree_makeFromLengths(tree, bitlen, NUM_DEFLATE_CODE_SYMBOLS, 15);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1049
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1050 lodepng_free(bitlen);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1051 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1052 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1053
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1054 /get the distance code tree of a deflated block with fixed tree, as specified in the deflate specification/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1055 static unsigned generateFixedDistanceTree(HuffmanTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1056 unsigned i, error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1057 unsigned* bitlen = (unsigned)lodepng_malloc(NUM_DISTANCE_SYMBOLS sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1058 if(!bitlen) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1059
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1060 /there are 32 distance codes, but 30-31 are unused/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1061 for(i = 0; i != NUM_DISTANCE_SYMBOLS; ++i) bitlen[i] = 5;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1062 error = HuffmanTree_makeFromLengths(tree, bitlen, NUM_DISTANCE_SYMBOLS, 15);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1063
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1064 lodepng_free(bitlen);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1065 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1066 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1067
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1068 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1069
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1070 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1071 returns the code. The bit reader must already have been ensured at least 15 bits
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1072 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1073 static unsigned huffmanDecodeSymbol(LodePNGBitReader* reader, const HuffmanTree* codetree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1074 unsigned short code = peekBits(reader, FIRSTBITS);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1075 unsigned short l = codetree->table_len[code];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1076 unsigned short value = codetree->table_value[code];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1077 if(l <= FIRSTBITS) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1078 advanceBits(reader, l);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1079 return value;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1080 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1081 advanceBits(reader, FIRSTBITS);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1082 value += peekBits(reader, l - FIRSTBITS);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1083 advanceBits(reader, codetree->table_len[value] - FIRSTBITS);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1084 return codetree->table_value[value];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1085 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1086 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1087 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1088
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1089 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1090
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1091 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1092 /* / Inflator (Decompressor) / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1093 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1094
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1095 /*get the tree of a deflated block with fixed tree, as specified in the deflate specification
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1096 Returns error code.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1097 static unsigned getTreeInflateFixed(HuffmanTree* tree_ll, HuffmanTree* tree_d) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1098 unsigned error = generateFixedLitLenTree(tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1099 if(error) return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1100 return generateFixedDistanceTree(tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1101 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1102
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1103 /get the tree of a deflated block with dynamic tree, the tree itself is also Huffman compressed with a known tree/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1104 static unsigned getTreeInflateDynamic(HuffmanTree* tree_ll, HuffmanTree* tree_d,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1105 LodePNGBitReader* reader) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1106 /make sure that length values that aren't filled in will be 0, or a wrong tree will be generated/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1107 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1108 unsigned n, HLIT, HDIST, HCLEN, i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1109
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1110 /see comments in deflateDynamic for explanation of the context and these variables, it is analogous/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1111 unsigned* bitlen_ll = 0; /lit,len code lengths/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1112 unsigned* bitlen_d = 0; /dist code lengths/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1113 /code length code lengths ("clcl"), the bit lengths of the huffman tree used to compress bitlen_ll and bitlen_d/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1114 unsigned* bitlen_cl = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1115 HuffmanTree tree_cl; /the code tree for code length codes (the huffman tree for compressed huffman trees)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1116
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1117 if(reader->bitsize - reader->bp < 14) return 49; /error: the bit pointer is or will go past the memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1118 ensureBits17(reader, 14);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1119
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1120 /number of literal/length codes + 257. Unlike the spec, the value 257 is added to it here already/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1121 HLIT = readBits(reader, 5) + 257;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1122 /number of distance codes. Unlike the spec, the value 1 is added to it here already/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1123 HDIST = readBits(reader, 5) + 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1124 /number of code length codes. Unlike the spec, the value 4 is added to it here already/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1125 HCLEN = readBits(reader, 4) + 4;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1126
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1127 bitlen_cl = (unsigned)lodepng_malloc(NUM_CODE_LENGTH_CODES sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1128 if(!bitlen_cl) return 83 /alloc fail/;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1129
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1130 HuffmanTree_init(&tree_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1131
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1132 while(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1133 /read the code length codes out of 3 (amount of code length codes) bits*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1134 if(lodepng_gtofl(reader->bp, HCLEN * 3, reader->bitsize)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1135 ERROR_BREAK(50); /error: the bit pointer is or will go past the memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1136 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1137 for(i = 0; i != HCLEN; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1138 ensureBits9(reader, 3); /out of bounds already checked above /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1139 bitlen_cl[CLCL_ORDER[i]] = readBits(reader, 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1140 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1141 for(i = HCLEN; i != NUM_CODE_LENGTH_CODES; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1142 bitlen_cl[CLCL_ORDER[i]] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1143 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1144
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1145 error = HuffmanTree_makeFromLengths(&tree_cl, bitlen_cl, NUM_CODE_LENGTH_CODES, 7);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1146 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1147
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1148 /now we can use this tree to read the lengths for the tree that this function will return/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1149 bitlen_ll = (unsigned)lodepng_malloc(NUM_DEFLATE_CODE_SYMBOLS sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1150 bitlen_d = (unsigned)lodepng_malloc(NUM_DISTANCE_SYMBOLS sizeof(unsigned));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1151 if(!bitlen_ll \|\| !bitlen_d) ERROR_BREAK(83 /alloc fail/);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1152 lodepng_memset(bitlen_ll, 0, NUM_DEFLATE_CODE_SYMBOLS * sizeof(*bitlen_ll));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1153 lodepng_memset(bitlen_d, 0, NUM_DISTANCE_SYMBOLS * sizeof(*bitlen_d));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1154
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1155 /i is the current symbol we're reading in the part that contains the code lengths of lit/len and dist codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1156 i = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1157 while(i < HLIT + HDIST) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1158 unsigned code;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1159 ensureBits25(reader, 22); /* up to 15 bits for huffman code, up to 7 extra bits below*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1160 code = huffmanDecodeSymbol(reader, &tree_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1161 if(code <= 15) /a length code/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1162 if(i < HLIT) bitlen_ll[i] = code;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1163 else bitlen_d[i - HLIT] = code;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1164 ++i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1165 } else if(code == 16) /repeat previous/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1166 unsigned replength = 3; /read in the 2 bits that indicate repeat length (3-6)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1167 unsigned value; /set value to the previous code/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1168
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1169 if(i == 0) ERROR_BREAK(54); /can't repeat previous if i is 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1170
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1171 replength += readBits(reader, 2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1172
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1173 if(i < HLIT + 1) value = bitlen_ll[i - 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1174 else value = bitlen_d[i - HLIT - 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1175 /repeat this value in the next lengths/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1176 for(n = 0; n < replength; ++n) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1177 if(i >= HLIT + HDIST) ERROR_BREAK(13); /error: i is larger than the amount of codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1178 if(i < HLIT) bitlen_ll[i] = value;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1179 else bitlen_d[i - HLIT] = value;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1180 ++i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1181 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1182 } else if(code == 17) /repeat "0" 3-10 times/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1183 unsigned replength = 3; /read in the bits that indicate repeat length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1184 replength += readBits(reader, 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1185
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1186 /repeat this value in the next lengths/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1187 for(n = 0; n < replength; ++n) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1188 if(i >= HLIT + HDIST) ERROR_BREAK(14); /error: i is larger than the amount of codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1189
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1190 if(i < HLIT) bitlen_ll[i] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1191 else bitlen_d[i - HLIT] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1192 ++i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1193 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1194 } else if(code == 18) /repeat "0" 11-138 times/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1195 unsigned replength = 11; /read in the bits that indicate repeat length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1196 replength += readBits(reader, 7);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1197
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1198 /repeat this value in the next lengths/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1199 for(n = 0; n < replength; ++n) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1200 if(i >= HLIT + HDIST) ERROR_BREAK(15); /error: i is larger than the amount of codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1201
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1202 if(i < HLIT) bitlen_ll[i] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1203 else bitlen_d[i - HLIT] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1204 ++i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1205 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1206 } else /if(code == INVALIDSYMBOL)/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1207 ERROR_BREAK(16); /error: tried to read disallowed huffman symbol/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1208 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1209 /check if any of the ensureBits above went out of bounds/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1210 if(reader->bp > reader->bitsize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1211 /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1212 (10=no endcode, 11=wrong jump outside of tree)*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1213 /* TODO: revise error codes 10,11,50: the above comment is no longer valid */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1214 ERROR_BREAK(50); /error, bit pointer jumps past memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1215 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1216 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1217 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1218
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1219 if(bitlen_ll[256] == 0) ERROR_BREAK(64); /the length of the end code 256 must be larger than 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1220
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1221 /now we've finally got HLIT and HDIST, so generate the code trees, and the function is done/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1222 error = HuffmanTree_makeFromLengths(tree_ll, bitlen_ll, NUM_DEFLATE_CODE_SYMBOLS, 15);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1223 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1224 error = HuffmanTree_makeFromLengths(tree_d, bitlen_d, NUM_DISTANCE_SYMBOLS, 15);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1225
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1226 break; /end of error-while/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1227 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1228
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1229 lodepng_free(bitlen_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1230 lodepng_free(bitlen_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1231 lodepng_free(bitlen_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1232 HuffmanTree_cleanup(&tree_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1233
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1234 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1235 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1236
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1237 /inflate a block with dynamic of fixed Huffman tree. btype must be 1 or 2./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1238 static unsigned inflateHuffmanBlock(ucvector* out, LodePNGBitReader* reader,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1239 unsigned btype, size_t max_output_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1240 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1241 HuffmanTree tree_ll; /the huffman tree for literal and length codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1242 HuffmanTree tree_d; /the huffman tree for distance codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1243 const size_t reserved_size = 260; /* must be at least 258 for max length, and a few extra for adding a few extra literals */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1244 int done = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1245
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1246 if(!ucvector_reserve(out, out->size + reserved_size)) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1247
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1248 HuffmanTree_init(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1249 HuffmanTree_init(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1250
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1251 if(btype == 1) error = getTreeInflateFixed(&tree_ll, &tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1252 else /if(btype == 2)/ error = getTreeInflateDynamic(&tree_ll, &tree_d, reader);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1253
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1254
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1255 while(!error && !done) /decode all symbols until end reached, breaks at end code/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1256 /code_ll is literal, length or end code/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1257 unsigned code_ll;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1258 /* ensure enough bits for 2 huffman code reads (15 bits each): if the first is a literal, a second literal is read at once. This
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1259 appears to be slightly faster, than ensuring 20 bits here for 1 huffman symbol and the potential 5 extra bits for the length symbol.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1260 ensureBits32(reader, 30);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1261 code_ll = huffmanDecodeSymbol(reader, &tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1262 if(code_ll <= 255) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1263 /slightly faster code path if multiple literals in a row/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1264 out->data[out->size++] = (unsigned char)code_ll;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1265 code_ll = huffmanDecodeSymbol(reader, &tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1266 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1267 if(code_ll <= 255) /literal symbol/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1268 out->data[out->size++] = (unsigned char)code_ll;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1269 } else if(code_ll >= FIRST_LENGTH_CODE_INDEX && code_ll <= LAST_LENGTH_CODE_INDEX) /length code/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1270 unsigned code_d, distance;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1271 unsigned numextrabits_l, numextrabits_d; /extra bits for length and distance/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1272 size_t start, backward, length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1273
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1274 /part 1: get length base/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1275 length = LENGTHBASE[code_ll - FIRST_LENGTH_CODE_INDEX];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1276
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1277 /part 2: get extra bits and add the value of that to length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1278 numextrabits_l = LENGTHEXTRA[code_ll - FIRST_LENGTH_CODE_INDEX];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1279 if(numextrabits_l != 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1280 /* bits already ensured above */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1281 ensureBits25(reader, 5);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1282 length += readBits(reader, numextrabits_l);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1283 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1284
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1285 /part 3: get distance code/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1286 ensureBits32(reader, 28); /* up to 15 for the huffman symbol, up to 13 for the extra bits */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1287 code_d = huffmanDecodeSymbol(reader, &tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1288 if(code_d > 29) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1289 if(code_d <= 31) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1290 ERROR_BREAK(18); /error: invalid distance code (30-31 are never used)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1291 } else /* if(code_d == INVALIDSYMBOL) */{
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1292 ERROR_BREAK(16); /error: tried to read disallowed huffman symbol/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1293 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1294 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1295 distance = DISTANCEBASE[code_d];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1296
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1297 /part 4: get extra bits from distance/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1298 numextrabits_d = DISTANCEEXTRA[code_d];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1299 if(numextrabits_d != 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1300 /* bits already ensured above */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1301 distance += readBits(reader, numextrabits_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1302 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1303
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1304 /part 5: fill in all the out[n] values based on the length and dist/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1305 start = out->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1306 if(distance > start) ERROR_BREAK(52); /too long backward distance/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1307 backward = start - distance;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1308
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1309 out->size += length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1310 if(distance < length) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1311 size_t forward;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1312 lodepng_memcpy(out->data + start, out->data + backward, distance);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1313 start += distance;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1314 for(forward = distance; forward < length; ++forward) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1315 out->data[start++] = out->data[backward++];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1316 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1317 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1318 lodepng_memcpy(out->data + start, out->data + backward, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1319 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1320 } else if(code_ll == 256) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1321 done = 1; /end code, finish the loop/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1322 } else /if(code_ll == INVALIDSYMBOL)/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1323 ERROR_BREAK(16); /error: tried to read disallowed huffman symbol/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1324 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1325 if(out->allocsize - out->size < reserved_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1326 if(!ucvector_reserve(out, out->size + reserved_size)) ERROR_BREAK(83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1327 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1328 /check if any of the ensureBits above went out of bounds/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1329 if(reader->bp > reader->bitsize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1330 /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1331 (10=no endcode, 11=wrong jump outside of tree)*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1332 /* TODO: revise error codes 10,11,50: the above comment is no longer valid */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1333 ERROR_BREAK(51); /error, bit pointer jumps past memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1334 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1335 if(max_output_size && out->size > max_output_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1336 ERROR_BREAK(109); /error, larger than max size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1337 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1338 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1339
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1340 HuffmanTree_cleanup(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1341 HuffmanTree_cleanup(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1342
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1343 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1344 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1345
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1346 static unsigned inflateNoCompression(ucvector* out, LodePNGBitReader* reader,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1347 const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1348 size_t bytepos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1349 size_t size = reader->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1350 unsigned LEN, NLEN, error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1351
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1352 /go to first boundary of byte/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1353 bytepos = (reader->bp + 7u) >> 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1354
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1355 /read LEN (2 bytes) and NLEN (2 bytes)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1356 if(bytepos + 4 >= size) return 52; /error, bit pointer will jump past memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1357 LEN = (unsigned)reader->data[bytepos] + ((unsigned)reader->data[bytepos + 1] << 8u); bytepos += 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1358 NLEN = (unsigned)reader->data[bytepos] + ((unsigned)reader->data[bytepos + 1] << 8u); bytepos += 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1359
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1360 /check if 16-bit NLEN is really the one's complement of LEN/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1361 if(!settings->ignore_nlen && LEN + NLEN != 65535) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1362 return 21; /error: NLEN is not one's complement of LEN/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1363 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1364
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1365 if(!ucvector_resize(out, out->size + LEN)) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1366
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1367 /read the literal data: LEN bytes are now stored in the out buffer/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1368 if(bytepos + LEN > size) return 23; /error: reading outside of in buffer/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1369
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1370 /out->data can be NULL (when LEN is zero), and arithmetics on NULL ptr is undefined/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1371 if (LEN) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1372 lodepng_memcpy(out->data + out->size - LEN, reader->data + bytepos, LEN);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1373 bytepos += LEN;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1374 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1375
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1376 reader->bp = bytepos << 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1377
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1378 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1379 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1380
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1381 static unsigned lodepng_inflatev(ucvector* out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1382 const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1383 const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1384 unsigned BFINAL = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1385 LodePNGBitReader reader;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1386 unsigned error = LodePNGBitReader_init(&reader, in, insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1387
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1388 if(error) return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1389
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1390 while(!BFINAL) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1391 unsigned BTYPE;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1392 if(reader.bitsize - reader.bp < 3) return 52; /error, bit pointer will jump past memory/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1393 ensureBits9(&reader, 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1394 BFINAL = readBits(&reader, 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1395 BTYPE = readBits(&reader, 2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1396
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1397 if(BTYPE == 3) return 20; /error: invalid BTYPE/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1398 else if(BTYPE == 0) error = inflateNoCompression(out, &reader, settings); /no compression/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1399 else error = inflateHuffmanBlock(out, &reader, BTYPE, settings->max_output_size); /compression, BTYPE 01 or 10/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1400 if(!error && settings->max_output_size && out->size > settings->max_output_size) error = 109;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1401 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1402 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1403
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1404 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1405 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1406
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1407 unsigned lodepng_inflate(unsigned char** out, size_t* outsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1408 const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1409 const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1410 ucvector v = ucvector_init(out, outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1411 unsigned error = lodepng_inflatev(&v, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1412 *out = v.data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1413 *outsize = v.size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1414 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1415 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1416
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1417 static unsigned inflatev(ucvector* out, const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1418 const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1419 if(settings->custom_inflate) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1420 unsigned error = settings->custom_inflate(&out->data, &out->size, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1421 out->allocsize = out->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1422 if(error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1423 /the custom inflate is allowed to have its own error codes, however, we translate it to code 110/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1424 error = 110;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1425 /if there's a max output size, and the custom zlib returned error, then indicate that error instead/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1426 if(settings->max_output_size && out->size > settings->max_output_size) error = 109;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1427 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1428 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1429 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1430 return lodepng_inflatev(out, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1431 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1432 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1433
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1434 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1435
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1436 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1437
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1438 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1439 /* / Deflator (Compressor) / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1440 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1441
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1442 static const size_t MAX_SUPPORTED_DEFLATE_LENGTH = 258;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1443
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1444 /*search the index in the array, that has the largest value smaller than or equal to the given value,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1445 given array must be sorted (if no value is smaller, it returns the size of the given array)*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1446 static size_t searchCodeIndex(const unsigned* array, size_t array_size, size_t value) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1447 /binary search (only small gain over linear). TODO: use CPU log2 instruction for getting symbols instead/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1448 size_t left = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1449 size_t right = array_size - 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1450
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1451 while(left <= right) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1452 size_t mid = (left + right) >> 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1453 if(array[mid] >= value) right = mid - 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1454 else left = mid + 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1455 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1456 if(left >= array_size \|\| array[left] > value) left--;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1457 return left;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1458 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1459
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1460 static void addLengthDistance(uivector* values, size_t length, size_t distance) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1461 /*values in encoded vector are those used by deflate:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1462 0-255: literal bytes
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1463 256: end
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1464 257-285: length/distance pair (length code, followed by extra length bits, distance code, extra distance bits)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1465 286-287: invalid*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1466
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1467 unsigned length_code = (unsigned)searchCodeIndex(LENGTHBASE, 29, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1468 unsigned extra_length = (unsigned)(length - LENGTHBASE[length_code]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1469 unsigned dist_code = (unsigned)searchCodeIndex(DISTANCEBASE, 30, distance);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1470 unsigned extra_distance = (unsigned)(distance - DISTANCEBASE[dist_code]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1471
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1472 size_t pos = values->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1473 /TODO: return error when this fails (out of memory)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1474 unsigned ok = uivector_resize(values, values->size + 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1475 if(ok) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1476 values->data[pos + 0] = length_code + FIRST_LENGTH_CODE_INDEX;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1477 values->data[pos + 1] = extra_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1478 values->data[pos + 2] = dist_code;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1479 values->data[pos + 3] = extra_distance;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1480 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1481 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1482
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1483 /*3 bytes of data get encoded into two bytes. The hash cannot use more than 3
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1484 bytes as input because 3 is the minimum match length for deflate*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1485 static const unsigned HASH_NUM_VALUES = 65536;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1486 static const unsigned HASH_BIT_MASK = 65535; /HASH_NUM_VALUES - 1, but C90 does not like that as initializer/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1487
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1488 typedef struct Hash {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1489 int* head; /hash value to head circular pos - can be outdated if went around window/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1490 /circular pos to prev circular pos/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1491 unsigned short* chain;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1492 int* val; /circular pos to hash value/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1493
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1494 /*TODO: do this not only for zeros but for any repeated byte. However for PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1495 it's always going to be the zeros that dominate, so not important for PNG*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1496 int* headz; /similar to head, but for chainz/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1497 unsigned short* chainz; /those with same amount of zeros/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1498 unsigned short* zeros; /length of zeros streak, used as a second hash chain/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1499 } Hash;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1500
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1501 static unsigned hash_init(Hash* hash, unsigned windowsize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1502 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1503 hash->head = (int)lodepng_malloc(sizeof(int) HASH_NUM_VALUES);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1504 hash->val = (int)lodepng_malloc(sizeof(int) windowsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1505 hash->chain = (unsigned short)lodepng_malloc(sizeof(unsigned short) windowsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1506
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1507 hash->zeros = (unsigned short)lodepng_malloc(sizeof(unsigned short) windowsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1508 hash->headz = (int)lodepng_malloc(sizeof(int) (MAX_SUPPORTED_DEFLATE_LENGTH + 1));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1509 hash->chainz = (unsigned short)lodepng_malloc(sizeof(unsigned short) windowsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1510
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1511 if(!hash->head \|\| !hash->chain \|\| !hash->val \|\| !hash->headz\|\| !hash->chainz \|\| !hash->zeros) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1512 return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1513 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1514
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1515 /initialize hash table/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1516 for(i = 0; i != HASH_NUM_VALUES; ++i) hash->head[i] = -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1517 for(i = 0; i != windowsize; ++i) hash->val[i] = -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1518 for(i = 0; i != windowsize; ++i) hash->chain[i] = i; /same value as index indicates uninitialized/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1519
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1520 for(i = 0; i <= MAX_SUPPORTED_DEFLATE_LENGTH; ++i) hash->headz[i] = -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1521 for(i = 0; i != windowsize; ++i) hash->chainz[i] = i; /same value as index indicates uninitialized/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1522
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1523 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1524 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1525
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1526 static void hash_cleanup(Hash* hash) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1527 lodepng_free(hash->head);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1528 lodepng_free(hash->val);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1529 lodepng_free(hash->chain);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1530
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1531 lodepng_free(hash->zeros);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1532 lodepng_free(hash->headz);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1533 lodepng_free(hash->chainz);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1534 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1535
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1536
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1537
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1538 static unsigned getHash(const unsigned char* data, size_t size, size_t pos) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1539 unsigned result = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1540 if(pos + 2 < size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1541 /*A simple shift and xor hash is used. Since the data of PNGs is dominated
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1542 by zeroes due to the filters, a better hash does not have a significant
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1543 effect on speed in traversing the chain, and causes more time spend on
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1544 calculating the hash.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1545 result ^= ((unsigned)data[pos + 0] << 0u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1546 result ^= ((unsigned)data[pos + 1] << 4u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1547 result ^= ((unsigned)data[pos + 2] << 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1548 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1549 size_t amount, i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1550 if(pos >= size) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1551 amount = size - pos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1552 for(i = 0; i != amount; ++i) result ^= ((unsigned)data[pos + i] << (i * 8u));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1553 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1554 return result & HASH_BIT_MASK;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1555 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1556
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1557 static unsigned countZeros(const unsigned char* data, size_t size, size_t pos) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1558 const unsigned char* start = data + pos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1559 const unsigned char* end = start + MAX_SUPPORTED_DEFLATE_LENGTH;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1560 if(end > data + size) end = data + size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1561 data = start;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1562 while(data != end && *data == 0) ++data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1563 /subtracting two addresses returned as 32-bit number (max value is MAX_SUPPORTED_DEFLATE_LENGTH)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1564 return (unsigned)(data - start);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1565 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1566
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1567 /wpos = pos & (windowsize - 1)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1568 static void updateHashChain(Hash* hash, size_t wpos, unsigned hashval, unsigned short numzeros) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1569 hash->val[wpos] = (int)hashval;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1570 if(hash->head[hashval] != -1) hash->chain[wpos] = hash->head[hashval];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1571 hash->head[hashval] = (int)wpos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1572
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1573 hash->zeros[wpos] = numzeros;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1574 if(hash->headz[numzeros] != -1) hash->chainz[wpos] = hash->headz[numzeros];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1575 hash->headz[numzeros] = (int)wpos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1576 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1577
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1578 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1579 LZ77-encode the data. Return value is error code. The input are raw bytes, the output
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1580 is in the form of unsigned integers with codes representing for example literal bytes, or
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1581 length/distance pairs.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1582 It uses a hash table technique to let it encode faster. When doing LZ77 encoding, a
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1583 sliding window (of windowsize) is used, and all past bytes in that window can be used as
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1584 the "dictionary". A brute force search through all possible distances would be slow, and
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1585 this hash technique is one out of several ways to speed this up.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1586 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1587 static unsigned encodeLZ77(uivector* out, Hash* hash,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1588 const unsigned char* in, size_t inpos, size_t insize, unsigned windowsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1589 unsigned minmatch, unsigned nicematch, unsigned lazymatching) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1590 size_t pos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1591 unsigned i, error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1592 /for large window lengths, assume the user wants no compression loss. Otherwise, max hash chain length speedup./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1593 unsigned maxchainlength = windowsize >= 8192 ? windowsize : windowsize / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1594 unsigned maxlazymatch = windowsize >= 8192 ? MAX_SUPPORTED_DEFLATE_LENGTH : 64;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1595
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1596 unsigned usezeros = 1; /not sure if setting it to false for windowsize < 8192 is better or worse/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1597 unsigned numzeros = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1598
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1599 unsigned offset; /the offset represents the distance in LZ77 terminology/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1600 unsigned length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1601 unsigned lazy = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1602 unsigned lazylength = 0, lazyoffset = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1603 unsigned hashval;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1604 unsigned current_offset, current_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1605 unsigned prev_offset;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1606 const unsigned char lastptr, foreptr, *backptr;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1607 unsigned hashpos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1608
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1609 if(windowsize == 0 \|\| windowsize > 32768) return 60; /error: windowsize smaller/larger than allowed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1610 if((windowsize & (windowsize - 1)) != 0) return 90; /error: must be power of two/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1611
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1612 if(nicematch > MAX_SUPPORTED_DEFLATE_LENGTH) nicematch = MAX_SUPPORTED_DEFLATE_LENGTH;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1613
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1614 for(pos = inpos; pos < insize; ++pos) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1615 size_t wpos = pos & (windowsize - 1); /position for in 'circular' hash buffers/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1616 unsigned chainlength = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1617
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1618 hashval = getHash(in, insize, pos);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1619
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1620 if(usezeros && hashval == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1621 if(numzeros == 0) numzeros = countZeros(in, insize, pos);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1622 else if(pos + numzeros > insize \|\| in[pos + numzeros - 1] != 0) --numzeros;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1623 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1624 numzeros = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1625 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1626
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1627 updateHashChain(hash, wpos, hashval, numzeros);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1628
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1629 /the length and offset found for the current position/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1630 length = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1631 offset = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1632
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1633 hashpos = hash->chain[wpos];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1634
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1635 lastptr = &in[insize < pos + MAX_SUPPORTED_DEFLATE_LENGTH ? insize : pos + MAX_SUPPORTED_DEFLATE_LENGTH];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1636
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1637 /search for the longest string/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1638 prev_offset = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1639 for(;;) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1640 if(chainlength++ >= maxchainlength) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1641 current_offset = (unsigned)(hashpos <= wpos ? wpos - hashpos : wpos - hashpos + windowsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1642
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1643 if(current_offset < prev_offset) break; /stop when went completely around the circular buffer/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1644 prev_offset = current_offset;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1645 if(current_offset > 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1646 /test the next characters/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1647 foreptr = &in[pos];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1648 backptr = &in[pos - current_offset];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1649
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1650 /common case in PNGs is lots of zeros. Quickly skip over them as a speedup/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1651 if(numzeros >= 3) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1652 unsigned skip = hash->zeros[hashpos];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1653 if(skip > numzeros) skip = numzeros;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1654 backptr += skip;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1655 foreptr += skip;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1656 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1657
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1658 while(foreptr != lastptr && backptr == foreptr) /maximum supported length by deflate is max length/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1659 ++backptr;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1660 ++foreptr;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1661 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1662 current_length = (unsigned)(foreptr - &in[pos]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1663
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1664 if(current_length > length) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1665 length = current_length; /the longest length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1666 offset = current_offset; /the offset that is related to this longest length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1667 /*jump out once a length of max length is found (speed gain). This also jumps
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1668 out if length is MAX_SUPPORTED_DEFLATE_LENGTH*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1669 if(current_length >= nicematch) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1670 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1671 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1672
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1673 if(hashpos == hash->chain[hashpos]) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1674
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1675 if(numzeros >= 3 && length > numzeros) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1676 hashpos = hash->chainz[hashpos];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1677 if(hash->zeros[hashpos] != numzeros) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1678 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1679 hashpos = hash->chain[hashpos];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1680 /outdated hash value, happens if particular value was not encountered in whole last window/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1681 if(hash->val[hashpos] != (int)hashval) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1682 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1683 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1684
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1685 if(lazymatching) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1686 if(!lazy && length >= 3 && length <= maxlazymatch && length < MAX_SUPPORTED_DEFLATE_LENGTH) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1687 lazy = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1688 lazylength = length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1689 lazyoffset = offset;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1690 continue; /try the next byte/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1691 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1692 if(lazy) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1693 lazy = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1694 if(pos == 0) ERROR_BREAK(81);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1695 if(length > lazylength + 1) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1696 /push the previous character as literal/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1697 if(!uivector_push_back(out, in[pos - 1])) ERROR_BREAK(83 /alloc fail/);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1698 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1699 length = lazylength;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1700 offset = lazyoffset;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1701 hash->head[hashval] = -1; /the same hashchain update will be done, this ensures no wrong alteration/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1702 hash->headz[numzeros] = -1; /idem/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1703 --pos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1704 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1705 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1706 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1707 if(length >= 3 && offset > windowsize) ERROR_BREAK(86 /too big (or overflown negative) offset/);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1708
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1709 /encode it as length/distance pair or literal value/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1710 if(length < 3) /only lengths of 3 or higher are supported as length/distance pair/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1711 if(!uivector_push_back(out, in[pos])) ERROR_BREAK(83 /alloc fail/);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1712 } else if(length < minmatch \|\| (length == 3 && offset > 4096)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1713 /*compensate for the fact that longer offsets have more extra bits, a
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1714 length of only 3 may be not worth it then*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1715 if(!uivector_push_back(out, in[pos])) ERROR_BREAK(83 /alloc fail/);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1716 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1717 addLengthDistance(out, length, offset);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1718 for(i = 1; i < length; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1719 ++pos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1720 wpos = pos & (windowsize - 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1721 hashval = getHash(in, insize, pos);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1722 if(usezeros && hashval == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1723 if(numzeros == 0) numzeros = countZeros(in, insize, pos);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1724 else if(pos + numzeros > insize \|\| in[pos + numzeros - 1] != 0) --numzeros;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1725 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1726 numzeros = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1727 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1728 updateHashChain(hash, wpos, hashval, numzeros);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1729 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1730 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1731 } /end of the loop through each character of input/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1732
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1733 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1734 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1735
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1736 /* /////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1737
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1738 static unsigned deflateNoCompression(ucvector* out, const unsigned char* data, size_t datasize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1739 /*non compressed deflate block data: 1 bit BFINAL,2 bits BTYPE,(5 bits): it jumps to start of next byte,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1740 2 bytes LEN, 2 bytes NLEN, LEN bytes literal DATA*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1741
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1742 size_t i, numdeflateblocks = (datasize + 65534u) / 65535u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1743 unsigned datapos = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1744 for(i = 0; i != numdeflateblocks; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1745 unsigned BFINAL, BTYPE, LEN, NLEN;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1746 unsigned char firstbyte;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1747 size_t pos = out->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1748
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1749 BFINAL = (i == numdeflateblocks - 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1750 BTYPE = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1751
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1752 LEN = 65535;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1753 if(datasize - datapos < 65535u) LEN = (unsigned)datasize - datapos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1754 NLEN = 65535 - LEN;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1755
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1756 if(!ucvector_resize(out, out->size + LEN + 5)) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1757
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1758 firstbyte = (unsigned char)(BFINAL + ((BTYPE & 1u) << 1u) + ((BTYPE & 2u) << 1u));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1759 out->data[pos + 0] = firstbyte;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1760 out->data[pos + 1] = (unsigned char)(LEN & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1761 out->data[pos + 2] = (unsigned char)(LEN >> 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1762 out->data[pos + 3] = (unsigned char)(NLEN & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1763 out->data[pos + 4] = (unsigned char)(NLEN >> 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1764 lodepng_memcpy(out->data + pos + 5, data + datapos, LEN);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1765 datapos += LEN;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1766 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1767
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1768 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1769 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1770
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1771 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1772 write the lz77-encoded data, which has lit, len and dist codes, to compressed stream using huffman trees.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1773 tree_ll: the tree for lit and len codes.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1774 tree_d: the tree for distance codes.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1775 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1776 static void writeLZ77data(LodePNGBitWriter* writer, const uivector* lz77_encoded,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1777 const HuffmanTree* tree_ll, const HuffmanTree* tree_d) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1778 size_t i = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1779 for(i = 0; i != lz77_encoded->size; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1780 unsigned val = lz77_encoded->data[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1781 writeBitsReversed(writer, tree_ll->codes[val], tree_ll->lengths[val]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1782 if(val > 256) /for a length code, 3 more things have to be added/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1783 unsigned length_index = val - FIRST_LENGTH_CODE_INDEX;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1784 unsigned n_length_extra_bits = LENGTHEXTRA[length_index];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1785 unsigned length_extra_bits = lz77_encoded->data[++i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1786
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1787 unsigned distance_code = lz77_encoded->data[++i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1788
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1789 unsigned distance_index = distance_code;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1790 unsigned n_distance_extra_bits = DISTANCEEXTRA[distance_index];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1791 unsigned distance_extra_bits = lz77_encoded->data[++i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1792
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1793 writeBits(writer, length_extra_bits, n_length_extra_bits);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1794 writeBitsReversed(writer, tree_d->codes[distance_code], tree_d->lengths[distance_code]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1795 writeBits(writer, distance_extra_bits, n_distance_extra_bits);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1796 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1797 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1798 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1799
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1800 /Deflate for a block of type "dynamic", that is, with freely, optimally, created huffman trees/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1801 static unsigned deflateDynamic(LodePNGBitWriter* writer, Hash* hash,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1802 const unsigned char* data, size_t datapos, size_t dataend,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1803 const LodePNGCompressSettings* settings, unsigned final) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1804 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1805
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1806 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1807 A block is compressed as follows: The PNG data is lz77 encoded, resulting in
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1808 literal bytes and length/distance pairs. This is then huffman compressed with
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1809 two huffman trees. One huffman tree is used for the lit and len values ("ll"),
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1810 another huffman tree is used for the dist values ("d"). These two trees are
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1811 stored using their code lengths, and to compress even more these code lengths
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1812 are also run-length encoded and huffman compressed. This gives a huffman tree
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1813 of code lengths "cl". The code lengths used to describe this third tree are
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1814 the code length code lengths ("clcl").
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1815 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1816
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1817 /The lz77 encoded data, represented with integers since there will also be length and distance codes in it/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1818 uivector lz77_encoded;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1819 HuffmanTree tree_ll; /tree for lit,len values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1820 HuffmanTree tree_d; /tree for distance codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1821 HuffmanTree tree_cl; /tree for encoding the code lengths representing tree_ll and tree_d/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1822 unsigned* frequencies_ll = 0; /frequency of lit,len codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1823 unsigned* frequencies_d = 0; /frequency of dist codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1824 unsigned* frequencies_cl = 0; /frequency of code length codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1825 unsigned* bitlen_lld = 0; /lit,len,dist code lengths (int bits), literally (without repeat codes)./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1826 unsigned* bitlen_lld_e = 0; /bitlen_lld encoded with repeat codes (this is a rudimentary run length compression)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1827 size_t datasize = dataend - datapos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1828
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1829 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1830 If we could call "bitlen_cl" the the code length code lengths ("clcl"), that is the bit lengths of codes to represent
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1831 tree_cl in CLCL_ORDER, then due to the huffman compression of huffman tree representations ("two levels"), there are
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1832 some analogies:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1833 bitlen_lld is to tree_cl what data is to tree_ll and tree_d.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1834 bitlen_lld_e is to bitlen_lld what lz77_encoded is to data.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1835 bitlen_cl is to bitlen_lld_e what bitlen_lld is to lz77_encoded.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1836 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1837
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1838 unsigned BFINAL = final;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1839 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1840 size_t numcodes_ll, numcodes_d, numcodes_lld, numcodes_lld_e, numcodes_cl;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1841 unsigned HLIT, HDIST, HCLEN;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1842
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1843 uivector_init(&lz77_encoded);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1844 HuffmanTree_init(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1845 HuffmanTree_init(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1846 HuffmanTree_init(&tree_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1847 /* could fit on stack, but >1KB is on the larger side so allocate instead */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1848 frequencies_ll = (unsigned)lodepng_malloc(286 sizeof(*frequencies_ll));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1849 frequencies_d = (unsigned)lodepng_malloc(30 sizeof(*frequencies_d));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1850 frequencies_cl = (unsigned)lodepng_malloc(NUM_CODE_LENGTH_CODES sizeof(*frequencies_cl));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1851
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1852 if(!frequencies_ll \|\| !frequencies_d \|\| !frequencies_cl) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1853
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1854 /*This while loop never loops due to a break at the end, it is here to
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1855 allow breaking out of it to the cleanup phase on error conditions.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1856 while(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1857 lodepng_memset(frequencies_ll, 0, 286 * sizeof(*frequencies_ll));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1858 lodepng_memset(frequencies_d, 0, 30 * sizeof(*frequencies_d));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1859 lodepng_memset(frequencies_cl, 0, NUM_CODE_LENGTH_CODES * sizeof(*frequencies_cl));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1860
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1861 if(settings->use_lz77) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1862 error = encodeLZ77(&lz77_encoded, hash, data, datapos, dataend, settings->windowsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1863 settings->minmatch, settings->nicematch, settings->lazymatching);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1864 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1865 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1866 if(!uivector_resize(&lz77_encoded, datasize)) ERROR_BREAK(83 /alloc fail/);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1867 for(i = datapos; i < dataend; ++i) lz77_encoded.data[i - datapos] = data[i]; /no LZ77, but still will be Huffman compressed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1868 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1869
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1870 /Count the frequencies of lit, len and dist codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1871 for(i = 0; i != lz77_encoded.size; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1872 unsigned symbol = lz77_encoded.data[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1873 ++frequencies_ll[symbol];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1874 if(symbol > 256) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1875 unsigned dist = lz77_encoded.data[i + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1876 ++frequencies_d[dist];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1877 i += 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1878 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1879 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1880 frequencies_ll[256] = 1; /there will be exactly 1 end code, at the end of the block/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1881
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1882 /Make both huffman trees, one for the lit and len codes, one for the dist codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1883 error = HuffmanTree_makeFromFrequencies(&tree_ll, frequencies_ll, 257, 286, 15);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1884 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1885 /2, not 1, is chosen for mincodes: some buggy PNG decoders require at least 2 symbols in the dist tree/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1886 error = HuffmanTree_makeFromFrequencies(&tree_d, frequencies_d, 2, 30, 15);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1887 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1888
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1889 numcodes_ll = LODEPNG_MIN(tree_ll.numcodes, 286);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1890 numcodes_d = LODEPNG_MIN(tree_d.numcodes, 30);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1891 /store the code lengths of both generated trees in bitlen_lld/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1892 numcodes_lld = numcodes_ll + numcodes_d;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1893 bitlen_lld = (unsigned)lodepng_malloc(numcodes_lld sizeof(*bitlen_lld));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1894 /numcodes_lld_e never needs more size than bitlen_lld/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1895 bitlen_lld_e = (unsigned)lodepng_malloc(numcodes_lld sizeof(*bitlen_lld_e));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1896 if(!bitlen_lld \|\| !bitlen_lld_e) ERROR_BREAK(83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1897 numcodes_lld_e = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1898
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1899 for(i = 0; i != numcodes_ll; ++i) bitlen_lld[i] = tree_ll.lengths[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1900 for(i = 0; i != numcodes_d; ++i) bitlen_lld[numcodes_ll + i] = tree_d.lengths[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1901
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1902 /*run-length compress bitlen_ldd into bitlen_lld_e by using repeat codes 16 (copy length 3-6 times),
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1903 17 (3-10 zeroes), 18 (11-138 zeroes)*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1904 for(i = 0; i != numcodes_lld; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1905 unsigned j = 0; /amount of repetitions/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1906 while(i + j + 1 < numcodes_lld && bitlen_lld[i + j + 1] == bitlen_lld[i]) ++j;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1907
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1908 if(bitlen_lld[i] == 0 && j >= 2) /repeat code for zeroes/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1909 ++j; /include the first zero/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1910 if(j <= 10) /repeat code 17 supports max 10 zeroes/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1911 bitlen_lld_e[numcodes_lld_e++] = 17;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1912 bitlen_lld_e[numcodes_lld_e++] = j - 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1913 } else /repeat code 18 supports max 138 zeroes/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1914 if(j > 138) j = 138;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1915 bitlen_lld_e[numcodes_lld_e++] = 18;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1916 bitlen_lld_e[numcodes_lld_e++] = j - 11;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1917 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1918 i += (j - 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1919 } else if(j >= 3) /repeat code for value other than zero/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1920 size_t k;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1921 unsigned num = j / 6u, rest = j % 6u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1922 bitlen_lld_e[numcodes_lld_e++] = bitlen_lld[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1923 for(k = 0; k < num; ++k) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1924 bitlen_lld_e[numcodes_lld_e++] = 16;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1925 bitlen_lld_e[numcodes_lld_e++] = 6 - 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1926 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1927 if(rest >= 3) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1928 bitlen_lld_e[numcodes_lld_e++] = 16;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1929 bitlen_lld_e[numcodes_lld_e++] = rest - 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1930 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1931 else j -= rest;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1932 i += j;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1933 } else /too short to benefit from repeat code/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1934 bitlen_lld_e[numcodes_lld_e++] = bitlen_lld[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1935 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1936 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1937
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1938 /generate tree_cl, the huffmantree of huffmantrees/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1939 for(i = 0; i != numcodes_lld_e; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1940 ++frequencies_cl[bitlen_lld_e[i]];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1941 /*after a repeat code come the bits that specify the number of repetitions,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1942 those don't need to be in the frequencies_cl calculation*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1943 if(bitlen_lld_e[i] >= 16) ++i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1944 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1945
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1946 error = HuffmanTree_makeFromFrequencies(&tree_cl, frequencies_cl,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1947 NUM_CODE_LENGTH_CODES, NUM_CODE_LENGTH_CODES, 7);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1948 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1949
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1950 /compute amount of code-length-code-lengths to output/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1951 numcodes_cl = NUM_CODE_LENGTH_CODES;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1952 /trim zeros at the end (using CLCL_ORDER), but minimum size must be 4 (see HCLEN below)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1953 while(numcodes_cl > 4u && tree_cl.lengths[CLCL_ORDER[numcodes_cl - 1u]] == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1954 numcodes_cl--;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1955 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1956
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1957 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1958 Write everything into the output
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1959
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1960 After the BFINAL and BTYPE, the dynamic block consists out of the following:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1961 - 5 bits HLIT, 5 bits HDIST, 4 bits HCLEN
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1962 - (HCLEN+4)*3 bits code lengths of code length alphabet
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1963 - HLIT + 257 code lengths of lit/length alphabet (encoded using the code length
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1964 alphabet, + possible repetition codes 16, 17, 18)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1965 - HDIST + 1 code lengths of distance alphabet (encoded using the code length
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1966 alphabet, + possible repetition codes 16, 17, 18)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1967 - compressed data
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1968 - 256 (end code)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1969 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1970
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1971 /Write block type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1972 writeBits(writer, BFINAL, 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1973 writeBits(writer, 0, 1); /first bit of BTYPE "dynamic"/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1974 writeBits(writer, 1, 1); /second bit of BTYPE "dynamic"/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1975
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1976 /write the HLIT, HDIST and HCLEN values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1977 /*all three sizes take trimmed ending zeroes into account, done either by HuffmanTree_makeFromFrequencies
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1978 or in the loop for numcodes_cl above, which saves space. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1979 HLIT = (unsigned)(numcodes_ll - 257);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1980 HDIST = (unsigned)(numcodes_d - 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1981 HCLEN = (unsigned)(numcodes_cl - 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1982 writeBits(writer, HLIT, 5);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1983 writeBits(writer, HDIST, 5);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1984 writeBits(writer, HCLEN, 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1985
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1986 /write the code lengths of the code length alphabet ("bitlen_cl")/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1987 for(i = 0; i != numcodes_cl; ++i) writeBits(writer, tree_cl.lengths[CLCL_ORDER[i]], 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1988
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1989 /write the lengths of the lit/len AND the dist alphabet/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1990 for(i = 0; i != numcodes_lld_e; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1991 writeBitsReversed(writer, tree_cl.codes[bitlen_lld_e[i]], tree_cl.lengths[bitlen_lld_e[i]]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1992 /extra bits of repeat codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1993 if(bitlen_lld_e[i] == 16) writeBits(writer, bitlen_lld_e[++i], 2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1994 else if(bitlen_lld_e[i] == 17) writeBits(writer, bitlen_lld_e[++i], 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1995 else if(bitlen_lld_e[i] == 18) writeBits(writer, bitlen_lld_e[++i], 7);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1996 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1997
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1998 /write the compressed data symbols/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	1999 writeLZ77data(writer, &lz77_encoded, &tree_ll, &tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2000 /error: the length of the end code 256 must be larger than 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2001 if(tree_ll.lengths[256] == 0) ERROR_BREAK(64);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2002
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2003 /write the end code/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2004 writeBitsReversed(writer, tree_ll.codes[256], tree_ll.lengths[256]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2005
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2006 break; /end of error-while/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2007 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2008
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2009 /cleanup/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2010 uivector_cleanup(&lz77_encoded);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2011 HuffmanTree_cleanup(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2012 HuffmanTree_cleanup(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2013 HuffmanTree_cleanup(&tree_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2014 lodepng_free(frequencies_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2015 lodepng_free(frequencies_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2016 lodepng_free(frequencies_cl);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2017 lodepng_free(bitlen_lld);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2018 lodepng_free(bitlen_lld_e);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2019
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2020 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2021 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2022
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2023 static unsigned deflateFixed(LodePNGBitWriter* writer, Hash* hash,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2024 const unsigned char* data,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2025 size_t datapos, size_t dataend,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2026 const LodePNGCompressSettings* settings, unsigned final) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2027 HuffmanTree tree_ll; /tree for literal values and length codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2028 HuffmanTree tree_d; /tree for distance codes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2029
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2030 unsigned BFINAL = final;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2031 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2032 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2033
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2034 HuffmanTree_init(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2035 HuffmanTree_init(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2036
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2037 error = generateFixedLitLenTree(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2038 if(!error) error = generateFixedDistanceTree(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2039
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2040 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2041 writeBits(writer, BFINAL, 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2042 writeBits(writer, 1, 1); /first bit of BTYPE/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2043 writeBits(writer, 0, 1); /second bit of BTYPE/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2044
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2045 if(settings->use_lz77) /LZ77 encoded/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2046 uivector lz77_encoded;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2047 uivector_init(&lz77_encoded);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2048 error = encodeLZ77(&lz77_encoded, hash, data, datapos, dataend, settings->windowsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2049 settings->minmatch, settings->nicematch, settings->lazymatching);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2050 if(!error) writeLZ77data(writer, &lz77_encoded, &tree_ll, &tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2051 uivector_cleanup(&lz77_encoded);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2052 } else /no LZ77, but still will be Huffman compressed/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2053 for(i = datapos; i < dataend; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2054 writeBitsReversed(writer, tree_ll.codes[data[i]], tree_ll.lengths[data[i]]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2055 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2056 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2057 /add END code/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2058 if(!error) writeBitsReversed(writer,tree_ll.codes[256], tree_ll.lengths[256]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2059 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2060
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2061 /cleanup/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2062 HuffmanTree_cleanup(&tree_ll);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2063 HuffmanTree_cleanup(&tree_d);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2064
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2065 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2066 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2067
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2068 static unsigned lodepng_deflatev(ucvector* out, const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2069 const LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2070 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2071 size_t i, blocksize, numdeflateblocks;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2072 Hash hash;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2073 LodePNGBitWriter writer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2074
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2075 LodePNGBitWriter_init(&writer, out);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2076
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2077 if(settings->btype > 2) return 61;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2078 else if(settings->btype == 0) return deflateNoCompression(out, in, insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2079 else if(settings->btype == 1) blocksize = insize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2080 else /if(settings->btype == 2)/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2081 /on PNGs, deflate blocks of 65-262k seem to give most dense encoding/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2082 blocksize = insize / 8u + 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2083 if(blocksize < 65536) blocksize = 65536;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2084 if(blocksize > 262144) blocksize = 262144;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2085 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2086
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2087 numdeflateblocks = (insize + blocksize - 1) / blocksize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2088 if(numdeflateblocks == 0) numdeflateblocks = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2089
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2090 error = hash_init(&hash, settings->windowsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2091
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2092 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2093 for(i = 0; i != numdeflateblocks && !error; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2094 unsigned final = (i == numdeflateblocks - 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2095 size_t start = i * blocksize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2096 size_t end = start + blocksize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2097 if(end > insize) end = insize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2098
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2099 if(settings->btype == 1) error = deflateFixed(&writer, &hash, in, start, end, settings, final);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2100 else if(settings->btype == 2) error = deflateDynamic(&writer, &hash, in, start, end, settings, final);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2101 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2102 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2103
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2104 hash_cleanup(&hash);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2105
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2106 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2107 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2108
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2109 unsigned lodepng_deflate(unsigned char** out, size_t* outsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2110 const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2111 const LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2112 ucvector v = ucvector_init(out, outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2113 unsigned error = lodepng_deflatev(&v, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2114 *out = v.data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2115 *outsize = v.size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2116 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2117 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2118
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2119 static unsigned deflate(unsigned char** out, size_t* outsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2120 const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2121 const LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2122 if(settings->custom_deflate) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2123 unsigned error = settings->custom_deflate(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2124 /the custom deflate is allowed to have its own error codes, however, we translate it to code 111/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2125 return error ? 111 : 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2126 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2127 return lodepng_deflate(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2128 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2129 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2130
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2131 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2132
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2133 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2134 /* / Adler32 / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2135 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2136
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2137 static unsigned update_adler32(unsigned adler, const unsigned char* data, unsigned len) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2138 unsigned s1 = adler & 0xffffu;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2139 unsigned s2 = (adler >> 16u) & 0xffffu;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2140
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2141 while(len != 0u) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2142 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2143 /at least 5552 sums can be done before the sums overflow, saving a lot of module divisions/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2144 unsigned amount = len > 5552u ? 5552u : len;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2145 len -= amount;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2146 for(i = 0; i != amount; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2147 s1 += (*data++);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2148 s2 += s1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2149 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2150 s1 %= 65521u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2151 s2 %= 65521u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2152 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2153
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2154 return (s2 << 16u) \| s1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2155 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2156
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2157 /Return the adler32 of the bytes data[0..len-1]/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2158 static unsigned adler32(const unsigned char* data, unsigned len) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2159 return update_adler32(1u, data, len);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2160 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2161
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2162 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2163 /* / Zlib / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2164 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2165
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2166 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2167
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2168 static unsigned lodepng_zlib_decompressv(ucvector* out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2169 const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2170 const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2171 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2172 unsigned CM, CINFO, FDICT;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2173
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2174 if(insize < 2) return 53; /error, size of zlib data too small/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2175 /read information from zlib header/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2176 if((in[0] * 256 + in[1]) % 31 != 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2177 /error: 256 in[0] + in[1] must be a multiple of 31, the FCHECK value is supposed to be made that way*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2178 return 24;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2179 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2180
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2181 CM = in[0] & 15;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2182 CINFO = (in[0] >> 4) & 15;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2183 /FCHECK = in[1] & 31;/ /FCHECK is already tested above/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2184 FDICT = (in[1] >> 5) & 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2185 /FLEVEL = (in[1] >> 6) & 3;/ /FLEVEL is not used here/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2186
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2187 if(CM != 8 \|\| CINFO > 7) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2188 /error: only compression method 8: inflate with sliding window of 32k is supported by the PNG spec/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2189 return 25;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2190 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2191 if(FDICT != 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2192 /*error: the specification of PNG says about the zlib stream:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2193 "The additional flags shall not specify a preset dictionary."*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2194 return 26;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2195 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2196
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2197 error = inflatev(out, in + 2, insize - 2, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2198 if(error) return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2199
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2200 if(!settings->ignore_adler32) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2201 unsigned ADLER32 = lodepng_read32bitInt(&in[insize - 4]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2202 unsigned checksum = adler32(out->data, (unsigned)(out->size));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2203 if(checksum != ADLER32) return 58; /error, adler checksum not correct, data must be corrupted/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2204 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2205
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2206 return 0; /no error/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2207 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2208
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2209
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2210 unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2211 size_t insize, const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2212 ucvector v = ucvector_init(out, outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2213 unsigned error = lodepng_zlib_decompressv(&v, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2214 *out = v.data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2215 *outsize = v.size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2216 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2217 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2218
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2219 /expected_size is expected output size, to avoid intermediate allocations. Set to 0 if not known. /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2220 static unsigned zlib_decompress(unsigned char** out, size_t* outsize, size_t expected_size,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2221 const unsigned char* in, size_t insize, const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2222 unsigned error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2223 if(settings->custom_zlib) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2224 error = settings->custom_zlib(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2225 if(error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2226 /the custom zlib is allowed to have its own error codes, however, we translate it to code 110/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2227 error = 110;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2228 /if there's a max output size, and the custom zlib returned error, then indicate that error instead/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2229 if(settings->max_output_size && *outsize > settings->max_output_size) error = 109;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2230 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2231 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2232 ucvector v = ucvector_init(out, outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2233 if(expected_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2234 /reserve the memory to avoid intermediate reallocations/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2235 ucvector_resize(&v, *outsize + expected_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2236 v.size = *outsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2237 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2238 error = lodepng_zlib_decompressv(&v, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2239 *out = v.data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2240 *outsize = v.size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2241 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2242 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2243 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2244
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2245 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2246
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2247 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2248
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2249 unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2250 size_t insize, const LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2251 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2252 unsigned error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2253 unsigned char* deflatedata = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2254 size_t deflatesize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2255
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2256 error = deflate(&deflatedata, &deflatesize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2257
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2258 *out = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2259 *outsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2260 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2261 *outsize = deflatesize + 6;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2262 out = (unsigned char)lodepng_malloc(*outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2263 if(!out) error = 83; /alloc fail*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2264 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2265
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2266 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2267 unsigned ADLER32 = adler32(in, (unsigned)insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2268 /zlib data: 1 byte CMF (CM+CINFO), 1 byte FLG, deflate data, 4 byte ADLER32 checksum of the Decompressed data/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2269 unsigned CMF = 120; /0b01111000: CM 8, CINFO 7. With CINFO 7, any window size up to 32768 can be used./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2270 unsigned FLEVEL = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2271 unsigned FDICT = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2272 unsigned CMFFLG = 256 * CMF + FDICT * 32 + FLEVEL * 64;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2273 unsigned FCHECK = 31 - CMFFLG % 31;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2274 CMFFLG += FCHECK;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2275
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2276 (*out)[0] = (unsigned char)(CMFFLG >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2277 (*out)[1] = (unsigned char)(CMFFLG & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2278 for(i = 0; i != deflatesize; ++i) (*out)[i + 2] = deflatedata[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2279 lodepng_set32bitInt(&(out)[outsize - 4], ADLER32);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2280 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2281
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2282 lodepng_free(deflatedata);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2283 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2284 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2285
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2286 /* compress using the default or custom zlib function */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2287 static unsigned zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2288 size_t insize, const LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2289 if(settings->custom_zlib) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2290 unsigned error = settings->custom_zlib(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2291 /the custom zlib is allowed to have its own error codes, however, we translate it to code 111/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2292 return error ? 111 : 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2293 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2294 return lodepng_zlib_compress(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2295 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2296 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2297
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2298 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2299
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2300 #else /no LODEPNG_COMPILE_ZLIB/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2301
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2302 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2303 static unsigned zlib_decompress(unsigned char** out, size_t* outsize, size_t expected_size,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2304 const unsigned char* in, size_t insize, const LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2305 if(!settings->custom_zlib) return 87; /no custom zlib function provided /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2306 (void)expected_size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2307 return settings->custom_zlib(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2308 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2309 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2310 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2311 static unsigned zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2312 size_t insize, const LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2313 if(!settings->custom_zlib) return 87; /no custom zlib function provided /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2314 return settings->custom_zlib(out, outsize, in, insize, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2315 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2316 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2317
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2318 #endif /LODEPNG_COMPILE_ZLIB/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2319
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2320 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2321
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2322 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2323
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2324 /this is a good tradeoff between speed and compression ratio/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2325 #define DEFAULT_WINDOWSIZE 2048
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2326
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2327 void lodepng_compress_settings_init(LodePNGCompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2328 /compress with dynamic huffman tree (not in the mathematical sense, just not the predefined one)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2329 settings->btype = 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2330 settings->use_lz77 = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2331 settings->windowsize = DEFAULT_WINDOWSIZE;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2332 settings->minmatch = 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2333 settings->nicematch = 128;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2334 settings->lazymatching = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2335
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2336 settings->custom_zlib = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2337 settings->custom_deflate = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2338 settings->custom_context = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2339 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2340
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2341 const LodePNGCompressSettings lodepng_default_compress_settings = {2, 1, DEFAULT_WINDOWSIZE, 3, 128, 1, 0, 0, 0};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2342
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2343
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2344 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2345
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2346 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2347
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2348 void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2349 settings->ignore_adler32 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2350 settings->ignore_nlen = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2351 settings->max_output_size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2352
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2353 settings->custom_zlib = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2354 settings->custom_inflate = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2355 settings->custom_context = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2356 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2357
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2358 const LodePNGDecompressSettings lodepng_default_decompress_settings = {0, 0, 0, 0, 0, 0};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2359
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2360 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2361
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2362 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2363 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2364 /* // End of Zlib related code. Begin of PNG related code. // */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2365 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2366 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2367
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2368 #ifdef LODEPNG_COMPILE_PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2369
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2370 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2371 /* / CRC32 / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2372 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2373
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2374
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2375 #ifdef LODEPNG_COMPILE_CRC
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2376
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2377 static const unsigned lodepng_crc32_table0[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2378 0x00000000u, 0x77073096u, 0xee0e612cu, 0x990951bau, 0x076dc419u, 0x706af48fu, 0xe963a535u, 0x9e6495a3u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2379 0x0edb8832u, 0x79dcb8a4u, 0xe0d5e91eu, 0x97d2d988u, 0x09b64c2bu, 0x7eb17cbdu, 0xe7b82d07u, 0x90bf1d91u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2380 0x1db71064u, 0x6ab020f2u, 0xf3b97148u, 0x84be41deu, 0x1adad47du, 0x6ddde4ebu, 0xf4d4b551u, 0x83d385c7u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2381 0x136c9856u, 0x646ba8c0u, 0xfd62f97au, 0x8a65c9ecu, 0x14015c4fu, 0x63066cd9u, 0xfa0f3d63u, 0x8d080df5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2382 0x3b6e20c8u, 0x4c69105eu, 0xd56041e4u, 0xa2677172u, 0x3c03e4d1u, 0x4b04d447u, 0xd20d85fdu, 0xa50ab56bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2383 0x35b5a8fau, 0x42b2986cu, 0xdbbbc9d6u, 0xacbcf940u, 0x32d86ce3u, 0x45df5c75u, 0xdcd60dcfu, 0xabd13d59u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2384 0x26d930acu, 0x51de003au, 0xc8d75180u, 0xbfd06116u, 0x21b4f4b5u, 0x56b3c423u, 0xcfba9599u, 0xb8bda50fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2385 0x2802b89eu, 0x5f058808u, 0xc60cd9b2u, 0xb10be924u, 0x2f6f7c87u, 0x58684c11u, 0xc1611dabu, 0xb6662d3du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2386 0x76dc4190u, 0x01db7106u, 0x98d220bcu, 0xefd5102au, 0x71b18589u, 0x06b6b51fu, 0x9fbfe4a5u, 0xe8b8d433u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2387 0x7807c9a2u, 0x0f00f934u, 0x9609a88eu, 0xe10e9818u, 0x7f6a0dbbu, 0x086d3d2du, 0x91646c97u, 0xe6635c01u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2388 0x6b6b51f4u, 0x1c6c6162u, 0x856530d8u, 0xf262004eu, 0x6c0695edu, 0x1b01a57bu, 0x8208f4c1u, 0xf50fc457u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2389 0x65b0d9c6u, 0x12b7e950u, 0x8bbeb8eau, 0xfcb9887cu, 0x62dd1ddfu, 0x15da2d49u, 0x8cd37cf3u, 0xfbd44c65u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2390 0x4db26158u, 0x3ab551ceu, 0xa3bc0074u, 0xd4bb30e2u, 0x4adfa541u, 0x3dd895d7u, 0xa4d1c46du, 0xd3d6f4fbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2391 0x4369e96au, 0x346ed9fcu, 0xad678846u, 0xda60b8d0u, 0x44042d73u, 0x33031de5u, 0xaa0a4c5fu, 0xdd0d7cc9u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2392 0x5005713cu, 0x270241aau, 0xbe0b1010u, 0xc90c2086u, 0x5768b525u, 0x206f85b3u, 0xb966d409u, 0xce61e49fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2393 0x5edef90eu, 0x29d9c998u, 0xb0d09822u, 0xc7d7a8b4u, 0x59b33d17u, 0x2eb40d81u, 0xb7bd5c3bu, 0xc0ba6cadu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2394 0xedb88320u, 0x9abfb3b6u, 0x03b6e20cu, 0x74b1d29au, 0xead54739u, 0x9dd277afu, 0x04db2615u, 0x73dc1683u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2395 0xe3630b12u, 0x94643b84u, 0x0d6d6a3eu, 0x7a6a5aa8u, 0xe40ecf0bu, 0x9309ff9du, 0x0a00ae27u, 0x7d079eb1u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2396 0xf00f9344u, 0x8708a3d2u, 0x1e01f268u, 0x6906c2feu, 0xf762575du, 0x806567cbu, 0x196c3671u, 0x6e6b06e7u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2397 0xfed41b76u, 0x89d32be0u, 0x10da7a5au, 0x67dd4accu, 0xf9b9df6fu, 0x8ebeeff9u, 0x17b7be43u, 0x60b08ed5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2398 0xd6d6a3e8u, 0xa1d1937eu, 0x38d8c2c4u, 0x4fdff252u, 0xd1bb67f1u, 0xa6bc5767u, 0x3fb506ddu, 0x48b2364bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2399 0xd80d2bdau, 0xaf0a1b4cu, 0x36034af6u, 0x41047a60u, 0xdf60efc3u, 0xa867df55u, 0x316e8eefu, 0x4669be79u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2400 0xcb61b38cu, 0xbc66831au, 0x256fd2a0u, 0x5268e236u, 0xcc0c7795u, 0xbb0b4703u, 0x220216b9u, 0x5505262fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2401 0xc5ba3bbeu, 0xb2bd0b28u, 0x2bb45a92u, 0x5cb36a04u, 0xc2d7ffa7u, 0xb5d0cf31u, 0x2cd99e8bu, 0x5bdeae1du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2402 0x9b64c2b0u, 0xec63f226u, 0x756aa39cu, 0x026d930au, 0x9c0906a9u, 0xeb0e363fu, 0x72076785u, 0x05005713u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2403 0x95bf4a82u, 0xe2b87a14u, 0x7bb12baeu, 0x0cb61b38u, 0x92d28e9bu, 0xe5d5be0du, 0x7cdcefb7u, 0x0bdbdf21u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2404 0x86d3d2d4u, 0xf1d4e242u, 0x68ddb3f8u, 0x1fda836eu, 0x81be16cdu, 0xf6b9265bu, 0x6fb077e1u, 0x18b74777u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2405 0x88085ae6u, 0xff0f6a70u, 0x66063bcau, 0x11010b5cu, 0x8f659effu, 0xf862ae69u, 0x616bffd3u, 0x166ccf45u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2406 0xa00ae278u, 0xd70dd2eeu, 0x4e048354u, 0x3903b3c2u, 0xa7672661u, 0xd06016f7u, 0x4969474du, 0x3e6e77dbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2407 0xaed16a4au, 0xd9d65adcu, 0x40df0b66u, 0x37d83bf0u, 0xa9bcae53u, 0xdebb9ec5u, 0x47b2cf7fu, 0x30b5ffe9u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2408 0xbdbdf21cu, 0xcabac28au, 0x53b39330u, 0x24b4a3a6u, 0xbad03605u, 0xcdd70693u, 0x54de5729u, 0x23d967bfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2409 0xb3667a2eu, 0xc4614ab8u, 0x5d681b02u, 0x2a6f2b94u, 0xb40bbe37u, 0xc30c8ea1u, 0x5a05df1bu, 0x2d02ef8du
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2410 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2411
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2412 static const unsigned lodepng_crc32_table1[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2413 0x00000000u, 0x191b3141u, 0x32366282u, 0x2b2d53c3u, 0x646cc504u, 0x7d77f445u, 0x565aa786u, 0x4f4196c7u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2414 0xc8d98a08u, 0xd1c2bb49u, 0xfaefe88au, 0xe3f4d9cbu, 0xacb54f0cu, 0xb5ae7e4du, 0x9e832d8eu, 0x87981ccfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2415 0x4ac21251u, 0x53d92310u, 0x78f470d3u, 0x61ef4192u, 0x2eaed755u, 0x37b5e614u, 0x1c98b5d7u, 0x05838496u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2416 0x821b9859u, 0x9b00a918u, 0xb02dfadbu, 0xa936cb9au, 0xe6775d5du, 0xff6c6c1cu, 0xd4413fdfu, 0xcd5a0e9eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2417 0x958424a2u, 0x8c9f15e3u, 0xa7b24620u, 0xbea97761u, 0xf1e8e1a6u, 0xe8f3d0e7u, 0xc3de8324u, 0xdac5b265u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2418 0x5d5daeaau, 0x44469febu, 0x6f6bcc28u, 0x7670fd69u, 0x39316baeu, 0x202a5aefu, 0x0b07092cu, 0x121c386du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2419 0xdf4636f3u, 0xc65d07b2u, 0xed705471u, 0xf46b6530u, 0xbb2af3f7u, 0xa231c2b6u, 0x891c9175u, 0x9007a034u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2420 0x179fbcfbu, 0x0e848dbau, 0x25a9de79u, 0x3cb2ef38u, 0x73f379ffu, 0x6ae848beu, 0x41c51b7du, 0x58de2a3cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2421 0xf0794f05u, 0xe9627e44u, 0xc24f2d87u, 0xdb541cc6u, 0x94158a01u, 0x8d0ebb40u, 0xa623e883u, 0xbf38d9c2u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2422 0x38a0c50du, 0x21bbf44cu, 0x0a96a78fu, 0x138d96ceu, 0x5ccc0009u, 0x45d73148u, 0x6efa628bu, 0x77e153cau,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2423 0xbabb5d54u, 0xa3a06c15u, 0x888d3fd6u, 0x91960e97u, 0xded79850u, 0xc7cca911u, 0xece1fad2u, 0xf5facb93u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2424 0x7262d75cu, 0x6b79e61du, 0x4054b5deu, 0x594f849fu, 0x160e1258u, 0x0f152319u, 0x243870dau, 0x3d23419bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2425 0x65fd6ba7u, 0x7ce65ae6u, 0x57cb0925u, 0x4ed03864u, 0x0191aea3u, 0x188a9fe2u, 0x33a7cc21u, 0x2abcfd60u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2426 0xad24e1afu, 0xb43fd0eeu, 0x9f12832du, 0x8609b26cu, 0xc94824abu, 0xd05315eau, 0xfb7e4629u, 0xe2657768u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2427 0x2f3f79f6u, 0x362448b7u, 0x1d091b74u, 0x04122a35u, 0x4b53bcf2u, 0x52488db3u, 0x7965de70u, 0x607eef31u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2428 0xe7e6f3feu, 0xfefdc2bfu, 0xd5d0917cu, 0xcccba03du, 0x838a36fau, 0x9a9107bbu, 0xb1bc5478u, 0xa8a76539u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2429 0x3b83984bu, 0x2298a90au, 0x09b5fac9u, 0x10aecb88u, 0x5fef5d4fu, 0x46f46c0eu, 0x6dd93fcdu, 0x74c20e8cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2430 0xf35a1243u, 0xea412302u, 0xc16c70c1u, 0xd8774180u, 0x9736d747u, 0x8e2de606u, 0xa500b5c5u, 0xbc1b8484u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2431 0x71418a1au, 0x685abb5bu, 0x4377e898u, 0x5a6cd9d9u, 0x152d4f1eu, 0x0c367e5fu, 0x271b2d9cu, 0x3e001cddu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2432 0xb9980012u, 0xa0833153u, 0x8bae6290u, 0x92b553d1u, 0xddf4c516u, 0xc4eff457u, 0xefc2a794u, 0xf6d996d5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2433 0xae07bce9u, 0xb71c8da8u, 0x9c31de6bu, 0x852aef2au, 0xca6b79edu, 0xd37048acu, 0xf85d1b6fu, 0xe1462a2eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2434 0x66de36e1u, 0x7fc507a0u, 0x54e85463u, 0x4df36522u, 0x02b2f3e5u, 0x1ba9c2a4u, 0x30849167u, 0x299fa026u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2435 0xe4c5aeb8u, 0xfdde9ff9u, 0xd6f3cc3au, 0xcfe8fd7bu, 0x80a96bbcu, 0x99b25afdu, 0xb29f093eu, 0xab84387fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2436 0x2c1c24b0u, 0x350715f1u, 0x1e2a4632u, 0x07317773u, 0x4870e1b4u, 0x516bd0f5u, 0x7a468336u, 0x635db277u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2437 0xcbfad74eu, 0xd2e1e60fu, 0xf9ccb5ccu, 0xe0d7848du, 0xaf96124au, 0xb68d230bu, 0x9da070c8u, 0x84bb4189u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2438 0x03235d46u, 0x1a386c07u, 0x31153fc4u, 0x280e0e85u, 0x674f9842u, 0x7e54a903u, 0x5579fac0u, 0x4c62cb81u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2439 0x8138c51fu, 0x9823f45eu, 0xb30ea79du, 0xaa1596dcu, 0xe554001bu, 0xfc4f315au, 0xd7626299u, 0xce7953d8u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2440 0x49e14f17u, 0x50fa7e56u, 0x7bd72d95u, 0x62cc1cd4u, 0x2d8d8a13u, 0x3496bb52u, 0x1fbbe891u, 0x06a0d9d0u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2441 0x5e7ef3ecu, 0x4765c2adu, 0x6c48916eu, 0x7553a02fu, 0x3a1236e8u, 0x230907a9u, 0x0824546au, 0x113f652bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2442 0x96a779e4u, 0x8fbc48a5u, 0xa4911b66u, 0xbd8a2a27u, 0xf2cbbce0u, 0xebd08da1u, 0xc0fdde62u, 0xd9e6ef23u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2443 0x14bce1bdu, 0x0da7d0fcu, 0x268a833fu, 0x3f91b27eu, 0x70d024b9u, 0x69cb15f8u, 0x42e6463bu, 0x5bfd777au,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2444 0xdc656bb5u, 0xc57e5af4u, 0xee530937u, 0xf7483876u, 0xb809aeb1u, 0xa1129ff0u, 0x8a3fcc33u, 0x9324fd72u
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2445 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2446
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2447 static const unsigned lodepng_crc32_table2[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2448 0x00000000u, 0x01c26a37u, 0x0384d46eu, 0x0246be59u, 0x0709a8dcu, 0x06cbc2ebu, 0x048d7cb2u, 0x054f1685u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2449 0x0e1351b8u, 0x0fd13b8fu, 0x0d9785d6u, 0x0c55efe1u, 0x091af964u, 0x08d89353u, 0x0a9e2d0au, 0x0b5c473du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2450 0x1c26a370u, 0x1de4c947u, 0x1fa2771eu, 0x1e601d29u, 0x1b2f0bacu, 0x1aed619bu, 0x18abdfc2u, 0x1969b5f5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2451 0x1235f2c8u, 0x13f798ffu, 0x11b126a6u, 0x10734c91u, 0x153c5a14u, 0x14fe3023u, 0x16b88e7au, 0x177ae44du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2452 0x384d46e0u, 0x398f2cd7u, 0x3bc9928eu, 0x3a0bf8b9u, 0x3f44ee3cu, 0x3e86840bu, 0x3cc03a52u, 0x3d025065u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2453 0x365e1758u, 0x379c7d6fu, 0x35dac336u, 0x3418a901u, 0x3157bf84u, 0x3095d5b3u, 0x32d36beau, 0x331101ddu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2454 0x246be590u, 0x25a98fa7u, 0x27ef31feu, 0x262d5bc9u, 0x23624d4cu, 0x22a0277bu, 0x20e69922u, 0x2124f315u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2455 0x2a78b428u, 0x2bbade1fu, 0x29fc6046u, 0x283e0a71u, 0x2d711cf4u, 0x2cb376c3u, 0x2ef5c89au, 0x2f37a2adu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2456 0x709a8dc0u, 0x7158e7f7u, 0x731e59aeu, 0x72dc3399u, 0x7793251cu, 0x76514f2bu, 0x7417f172u, 0x75d59b45u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2457 0x7e89dc78u, 0x7f4bb64fu, 0x7d0d0816u, 0x7ccf6221u, 0x798074a4u, 0x78421e93u, 0x7a04a0cau, 0x7bc6cafdu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2458 0x6cbc2eb0u, 0x6d7e4487u, 0x6f38fadeu, 0x6efa90e9u, 0x6bb5866cu, 0x6a77ec5bu, 0x68315202u, 0x69f33835u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2459 0x62af7f08u, 0x636d153fu, 0x612bab66u, 0x60e9c151u, 0x65a6d7d4u, 0x6464bde3u, 0x662203bau, 0x67e0698du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2460 0x48d7cb20u, 0x4915a117u, 0x4b531f4eu, 0x4a917579u, 0x4fde63fcu, 0x4e1c09cbu, 0x4c5ab792u, 0x4d98dda5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2461 0x46c49a98u, 0x4706f0afu, 0x45404ef6u, 0x448224c1u, 0x41cd3244u, 0x400f5873u, 0x4249e62au, 0x438b8c1du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2462 0x54f16850u, 0x55330267u, 0x5775bc3eu, 0x56b7d609u, 0x53f8c08cu, 0x523aaabbu, 0x507c14e2u, 0x51be7ed5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2463 0x5ae239e8u, 0x5b2053dfu, 0x5966ed86u, 0x58a487b1u, 0x5deb9134u, 0x5c29fb03u, 0x5e6f455au, 0x5fad2f6du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2464 0xe1351b80u, 0xe0f771b7u, 0xe2b1cfeeu, 0xe373a5d9u, 0xe63cb35cu, 0xe7fed96bu, 0xe5b86732u, 0xe47a0d05u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2465 0xef264a38u, 0xeee4200fu, 0xeca29e56u, 0xed60f461u, 0xe82fe2e4u, 0xe9ed88d3u, 0xebab368au, 0xea695cbdu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2466 0xfd13b8f0u, 0xfcd1d2c7u, 0xfe976c9eu, 0xff5506a9u, 0xfa1a102cu, 0xfbd87a1bu, 0xf99ec442u, 0xf85cae75u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2467 0xf300e948u, 0xf2c2837fu, 0xf0843d26u, 0xf1465711u, 0xf4094194u, 0xf5cb2ba3u, 0xf78d95fau, 0xf64fffcdu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2468 0xd9785d60u, 0xd8ba3757u, 0xdafc890eu, 0xdb3ee339u, 0xde71f5bcu, 0xdfb39f8bu, 0xddf521d2u, 0xdc374be5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2469 0xd76b0cd8u, 0xd6a966efu, 0xd4efd8b6u, 0xd52db281u, 0xd062a404u, 0xd1a0ce33u, 0xd3e6706au, 0xd2241a5du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2470 0xc55efe10u, 0xc49c9427u, 0xc6da2a7eu, 0xc7184049u, 0xc25756ccu, 0xc3953cfbu, 0xc1d382a2u, 0xc011e895u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2471 0xcb4dafa8u, 0xca8fc59fu, 0xc8c97bc6u, 0xc90b11f1u, 0xcc440774u, 0xcd866d43u, 0xcfc0d31au, 0xce02b92du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2472 0x91af9640u, 0x906dfc77u, 0x922b422eu, 0x93e92819u, 0x96a63e9cu, 0x976454abu, 0x9522eaf2u, 0x94e080c5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2473 0x9fbcc7f8u, 0x9e7eadcfu, 0x9c381396u, 0x9dfa79a1u, 0x98b56f24u, 0x99770513u, 0x9b31bb4au, 0x9af3d17du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2474 0x8d893530u, 0x8c4b5f07u, 0x8e0de15eu, 0x8fcf8b69u, 0x8a809decu, 0x8b42f7dbu, 0x89044982u, 0x88c623b5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2475 0x839a6488u, 0x82580ebfu, 0x801eb0e6u, 0x81dcdad1u, 0x8493cc54u, 0x8551a663u, 0x8717183au, 0x86d5720du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2476 0xa9e2d0a0u, 0xa820ba97u, 0xaa6604ceu, 0xaba46ef9u, 0xaeeb787cu, 0xaf29124bu, 0xad6fac12u, 0xacadc625u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2477 0xa7f18118u, 0xa633eb2fu, 0xa4755576u, 0xa5b73f41u, 0xa0f829c4u, 0xa13a43f3u, 0xa37cfdaau, 0xa2be979du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2478 0xb5c473d0u, 0xb40619e7u, 0xb640a7beu, 0xb782cd89u, 0xb2cddb0cu, 0xb30fb13bu, 0xb1490f62u, 0xb08b6555u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2479 0xbbd72268u, 0xba15485fu, 0xb853f606u, 0xb9919c31u, 0xbcde8ab4u, 0xbd1ce083u, 0xbf5a5edau, 0xbe9834edu
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2480 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2481
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2482 static const unsigned lodepng_crc32_table3[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2483 0x00000000u, 0xb8bc6765u, 0xaa09c88bu, 0x12b5afeeu, 0x8f629757u, 0x37def032u, 0x256b5fdcu, 0x9dd738b9u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2484 0xc5b428efu, 0x7d084f8au, 0x6fbde064u, 0xd7018701u, 0x4ad6bfb8u, 0xf26ad8ddu, 0xe0df7733u, 0x58631056u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2485 0x5019579fu, 0xe8a530fau, 0xfa109f14u, 0x42acf871u, 0xdf7bc0c8u, 0x67c7a7adu, 0x75720843u, 0xcdce6f26u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2486 0x95ad7f70u, 0x2d111815u, 0x3fa4b7fbu, 0x8718d09eu, 0x1acfe827u, 0xa2738f42u, 0xb0c620acu, 0x087a47c9u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2487 0xa032af3eu, 0x188ec85bu, 0x0a3b67b5u, 0xb28700d0u, 0x2f503869u, 0x97ec5f0cu, 0x8559f0e2u, 0x3de59787u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2488 0x658687d1u, 0xdd3ae0b4u, 0xcf8f4f5au, 0x7733283fu, 0xeae41086u, 0x525877e3u, 0x40edd80du, 0xf851bf68u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2489 0xf02bf8a1u, 0x48979fc4u, 0x5a22302au, 0xe29e574fu, 0x7f496ff6u, 0xc7f50893u, 0xd540a77du, 0x6dfcc018u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2490 0x359fd04eu, 0x8d23b72bu, 0x9f9618c5u, 0x272a7fa0u, 0xbafd4719u, 0x0241207cu, 0x10f48f92u, 0xa848e8f7u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2491 0x9b14583du, 0x23a83f58u, 0x311d90b6u, 0x89a1f7d3u, 0x1476cf6au, 0xaccaa80fu, 0xbe7f07e1u, 0x06c36084u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2492 0x5ea070d2u, 0xe61c17b7u, 0xf4a9b859u, 0x4c15df3cu, 0xd1c2e785u, 0x697e80e0u, 0x7bcb2f0eu, 0xc377486bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2493 0xcb0d0fa2u, 0x73b168c7u, 0x6104c729u, 0xd9b8a04cu, 0x446f98f5u, 0xfcd3ff90u, 0xee66507eu, 0x56da371bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2494 0x0eb9274du, 0xb6054028u, 0xa4b0efc6u, 0x1c0c88a3u, 0x81dbb01au, 0x3967d77fu, 0x2bd27891u, 0x936e1ff4u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2495 0x3b26f703u, 0x839a9066u, 0x912f3f88u, 0x299358edu, 0xb4446054u, 0x0cf80731u, 0x1e4da8dfu, 0xa6f1cfbau,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2496 0xfe92dfecu, 0x462eb889u, 0x549b1767u, 0xec277002u, 0x71f048bbu, 0xc94c2fdeu, 0xdbf98030u, 0x6345e755u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2497 0x6b3fa09cu, 0xd383c7f9u, 0xc1366817u, 0x798a0f72u, 0xe45d37cbu, 0x5ce150aeu, 0x4e54ff40u, 0xf6e89825u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2498 0xae8b8873u, 0x1637ef16u, 0x048240f8u, 0xbc3e279du, 0x21e91f24u, 0x99557841u, 0x8be0d7afu, 0x335cb0cau,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2499 0xed59b63bu, 0x55e5d15eu, 0x47507eb0u, 0xffec19d5u, 0x623b216cu, 0xda874609u, 0xc832e9e7u, 0x708e8e82u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2500 0x28ed9ed4u, 0x9051f9b1u, 0x82e4565fu, 0x3a58313au, 0xa78f0983u, 0x1f336ee6u, 0x0d86c108u, 0xb53aa66du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2501 0xbd40e1a4u, 0x05fc86c1u, 0x1749292fu, 0xaff54e4au, 0x322276f3u, 0x8a9e1196u, 0x982bbe78u, 0x2097d91du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2502 0x78f4c94bu, 0xc048ae2eu, 0xd2fd01c0u, 0x6a4166a5u, 0xf7965e1cu, 0x4f2a3979u, 0x5d9f9697u, 0xe523f1f2u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2503 0x4d6b1905u, 0xf5d77e60u, 0xe762d18eu, 0x5fdeb6ebu, 0xc2098e52u, 0x7ab5e937u, 0x680046d9u, 0xd0bc21bcu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2504 0x88df31eau, 0x3063568fu, 0x22d6f961u, 0x9a6a9e04u, 0x07bda6bdu, 0xbf01c1d8u, 0xadb46e36u, 0x15080953u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2505 0x1d724e9au, 0xa5ce29ffu, 0xb77b8611u, 0x0fc7e174u, 0x9210d9cdu, 0x2aacbea8u, 0x38191146u, 0x80a57623u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2506 0xd8c66675u, 0x607a0110u, 0x72cfaefeu, 0xca73c99bu, 0x57a4f122u, 0xef189647u, 0xfdad39a9u, 0x45115eccu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2507 0x764dee06u, 0xcef18963u, 0xdc44268du, 0x64f841e8u, 0xf92f7951u, 0x41931e34u, 0x5326b1dau, 0xeb9ad6bfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2508 0xb3f9c6e9u, 0x0b45a18cu, 0x19f00e62u, 0xa14c6907u, 0x3c9b51beu, 0x842736dbu, 0x96929935u, 0x2e2efe50u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2509 0x2654b999u, 0x9ee8defcu, 0x8c5d7112u, 0x34e11677u, 0xa9362eceu, 0x118a49abu, 0x033fe645u, 0xbb838120u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2510 0xe3e09176u, 0x5b5cf613u, 0x49e959fdu, 0xf1553e98u, 0x6c820621u, 0xd43e6144u, 0xc68bceaau, 0x7e37a9cfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2511 0xd67f4138u, 0x6ec3265du, 0x7c7689b3u, 0xc4caeed6u, 0x591dd66fu, 0xe1a1b10au, 0xf3141ee4u, 0x4ba87981u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2512 0x13cb69d7u, 0xab770eb2u, 0xb9c2a15cu, 0x017ec639u, 0x9ca9fe80u, 0x241599e5u, 0x36a0360bu, 0x8e1c516eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2513 0x866616a7u, 0x3eda71c2u, 0x2c6fde2cu, 0x94d3b949u, 0x090481f0u, 0xb1b8e695u, 0xa30d497bu, 0x1bb12e1eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2514 0x43d23e48u, 0xfb6e592du, 0xe9dbf6c3u, 0x516791a6u, 0xccb0a91fu, 0x740cce7au, 0x66b96194u, 0xde0506f1u
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2515 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2516
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2517 static const unsigned lodepng_crc32_table4[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2518 0x00000000u, 0x3d6029b0u, 0x7ac05360u, 0x47a07ad0u, 0xf580a6c0u, 0xc8e08f70u, 0x8f40f5a0u, 0xb220dc10u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2519 0x30704bc1u, 0x0d106271u, 0x4ab018a1u, 0x77d03111u, 0xc5f0ed01u, 0xf890c4b1u, 0xbf30be61u, 0x825097d1u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2520 0x60e09782u, 0x5d80be32u, 0x1a20c4e2u, 0x2740ed52u, 0x95603142u, 0xa80018f2u, 0xefa06222u, 0xd2c04b92u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2521 0x5090dc43u, 0x6df0f5f3u, 0x2a508f23u, 0x1730a693u, 0xa5107a83u, 0x98705333u, 0xdfd029e3u, 0xe2b00053u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2522 0xc1c12f04u, 0xfca106b4u, 0xbb017c64u, 0x866155d4u, 0x344189c4u, 0x0921a074u, 0x4e81daa4u, 0x73e1f314u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2523 0xf1b164c5u, 0xccd14d75u, 0x8b7137a5u, 0xb6111e15u, 0x0431c205u, 0x3951ebb5u, 0x7ef19165u, 0x4391b8d5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2524 0xa121b886u, 0x9c419136u, 0xdbe1ebe6u, 0xe681c256u, 0x54a11e46u, 0x69c137f6u, 0x2e614d26u, 0x13016496u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2525 0x9151f347u, 0xac31daf7u, 0xeb91a027u, 0xd6f18997u, 0x64d15587u, 0x59b17c37u, 0x1e1106e7u, 0x23712f57u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2526 0x58f35849u, 0x659371f9u, 0x22330b29u, 0x1f532299u, 0xad73fe89u, 0x9013d739u, 0xd7b3ade9u, 0xead38459u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2527 0x68831388u, 0x55e33a38u, 0x124340e8u, 0x2f236958u, 0x9d03b548u, 0xa0639cf8u, 0xe7c3e628u, 0xdaa3cf98u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2528 0x3813cfcbu, 0x0573e67bu, 0x42d39cabu, 0x7fb3b51bu, 0xcd93690bu, 0xf0f340bbu, 0xb7533a6bu, 0x8a3313dbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2529 0x0863840au, 0x3503adbau, 0x72a3d76au, 0x4fc3fedau, 0xfde322cau, 0xc0830b7au, 0x872371aau, 0xba43581au,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2530 0x9932774du, 0xa4525efdu, 0xe3f2242du, 0xde920d9du, 0x6cb2d18du, 0x51d2f83du, 0x167282edu, 0x2b12ab5du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2531 0xa9423c8cu, 0x9422153cu, 0xd3826fecu, 0xeee2465cu, 0x5cc29a4cu, 0x61a2b3fcu, 0x2602c92cu, 0x1b62e09cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2532 0xf9d2e0cfu, 0xc4b2c97fu, 0x8312b3afu, 0xbe729a1fu, 0x0c52460fu, 0x31326fbfu, 0x7692156fu, 0x4bf23cdfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2533 0xc9a2ab0eu, 0xf4c282beu, 0xb362f86eu, 0x8e02d1deu, 0x3c220dceu, 0x0142247eu, 0x46e25eaeu, 0x7b82771eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2534 0xb1e6b092u, 0x8c869922u, 0xcb26e3f2u, 0xf646ca42u, 0x44661652u, 0x79063fe2u, 0x3ea64532u, 0x03c66c82u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2535 0x8196fb53u, 0xbcf6d2e3u, 0xfb56a833u, 0xc6368183u, 0x74165d93u, 0x49767423u, 0x0ed60ef3u, 0x33b62743u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2536 0xd1062710u, 0xec660ea0u, 0xabc67470u, 0x96a65dc0u, 0x248681d0u, 0x19e6a860u, 0x5e46d2b0u, 0x6326fb00u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2537 0xe1766cd1u, 0xdc164561u, 0x9bb63fb1u, 0xa6d61601u, 0x14f6ca11u, 0x2996e3a1u, 0x6e369971u, 0x5356b0c1u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2538 0x70279f96u, 0x4d47b626u, 0x0ae7ccf6u, 0x3787e546u, 0x85a73956u, 0xb8c710e6u, 0xff676a36u, 0xc2074386u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2539 0x4057d457u, 0x7d37fde7u, 0x3a978737u, 0x07f7ae87u, 0xb5d77297u, 0x88b75b27u, 0xcf1721f7u, 0xf2770847u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2540 0x10c70814u, 0x2da721a4u, 0x6a075b74u, 0x576772c4u, 0xe547aed4u, 0xd8278764u, 0x9f87fdb4u, 0xa2e7d404u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2541 0x20b743d5u, 0x1dd76a65u, 0x5a7710b5u, 0x67173905u, 0xd537e515u, 0xe857cca5u, 0xaff7b675u, 0x92979fc5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2542 0xe915e8dbu, 0xd475c16bu, 0x93d5bbbbu, 0xaeb5920bu, 0x1c954e1bu, 0x21f567abu, 0x66551d7bu, 0x5b3534cbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2543 0xd965a31au, 0xe4058aaau, 0xa3a5f07au, 0x9ec5d9cau, 0x2ce505dau, 0x11852c6au, 0x562556bau, 0x6b457f0au,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2544 0x89f57f59u, 0xb49556e9u, 0xf3352c39u, 0xce550589u, 0x7c75d999u, 0x4115f029u, 0x06b58af9u, 0x3bd5a349u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2545 0xb9853498u, 0x84e51d28u, 0xc34567f8u, 0xfe254e48u, 0x4c059258u, 0x7165bbe8u, 0x36c5c138u, 0x0ba5e888u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2546 0x28d4c7dfu, 0x15b4ee6fu, 0x521494bfu, 0x6f74bd0fu, 0xdd54611fu, 0xe03448afu, 0xa794327fu, 0x9af41bcfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2547 0x18a48c1eu, 0x25c4a5aeu, 0x6264df7eu, 0x5f04f6ceu, 0xed242adeu, 0xd044036eu, 0x97e479beu, 0xaa84500eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2548 0x4834505du, 0x755479edu, 0x32f4033du, 0x0f942a8du, 0xbdb4f69du, 0x80d4df2du, 0xc774a5fdu, 0xfa148c4du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2549 0x78441b9cu, 0x4524322cu, 0x028448fcu, 0x3fe4614cu, 0x8dc4bd5cu, 0xb0a494ecu, 0xf704ee3cu, 0xca64c78cu
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2550 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2551
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2552 static const unsigned lodepng_crc32_table5[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2553 0x00000000u, 0xcb5cd3a5u, 0x4dc8a10bu, 0x869472aeu, 0x9b914216u, 0x50cd91b3u, 0xd659e31du, 0x1d0530b8u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2554 0xec53826du, 0x270f51c8u, 0xa19b2366u, 0x6ac7f0c3u, 0x77c2c07bu, 0xbc9e13deu, 0x3a0a6170u, 0xf156b2d5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2555 0x03d6029bu, 0xc88ad13eu, 0x4e1ea390u, 0x85427035u, 0x9847408du, 0x531b9328u, 0xd58fe186u, 0x1ed33223u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2556 0xef8580f6u, 0x24d95353u, 0xa24d21fdu, 0x6911f258u, 0x7414c2e0u, 0xbf481145u, 0x39dc63ebu, 0xf280b04eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2557 0x07ac0536u, 0xccf0d693u, 0x4a64a43du, 0x81387798u, 0x9c3d4720u, 0x57619485u, 0xd1f5e62bu, 0x1aa9358eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2558 0xebff875bu, 0x20a354feu, 0xa6372650u, 0x6d6bf5f5u, 0x706ec54du, 0xbb3216e8u, 0x3da66446u, 0xf6fab7e3u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2559 0x047a07adu, 0xcf26d408u, 0x49b2a6a6u, 0x82ee7503u, 0x9feb45bbu, 0x54b7961eu, 0xd223e4b0u, 0x197f3715u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2560 0xe82985c0u, 0x23755665u, 0xa5e124cbu, 0x6ebdf76eu, 0x73b8c7d6u, 0xb8e41473u, 0x3e7066ddu, 0xf52cb578u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2561 0x0f580a6cu, 0xc404d9c9u, 0x4290ab67u, 0x89cc78c2u, 0x94c9487au, 0x5f959bdfu, 0xd901e971u, 0x125d3ad4u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2562 0xe30b8801u, 0x28575ba4u, 0xaec3290au, 0x659ffaafu, 0x789aca17u, 0xb3c619b2u, 0x35526b1cu, 0xfe0eb8b9u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2563 0x0c8e08f7u, 0xc7d2db52u, 0x4146a9fcu, 0x8a1a7a59u, 0x971f4ae1u, 0x5c439944u, 0xdad7ebeau, 0x118b384fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2564 0xe0dd8a9au, 0x2b81593fu, 0xad152b91u, 0x6649f834u, 0x7b4cc88cu, 0xb0101b29u, 0x36846987u, 0xfdd8ba22u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2565 0x08f40f5au, 0xc3a8dcffu, 0x453cae51u, 0x8e607df4u, 0x93654d4cu, 0x58399ee9u, 0xdeadec47u, 0x15f13fe2u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2566 0xe4a78d37u, 0x2ffb5e92u, 0xa96f2c3cu, 0x6233ff99u, 0x7f36cf21u, 0xb46a1c84u, 0x32fe6e2au, 0xf9a2bd8fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2567 0x0b220dc1u, 0xc07ede64u, 0x46eaaccau, 0x8db67f6fu, 0x90b34fd7u, 0x5bef9c72u, 0xdd7beedcu, 0x16273d79u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2568 0xe7718facu, 0x2c2d5c09u, 0xaab92ea7u, 0x61e5fd02u, 0x7ce0cdbau, 0xb7bc1e1fu, 0x31286cb1u, 0xfa74bf14u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2569 0x1eb014d8u, 0xd5ecc77du, 0x5378b5d3u, 0x98246676u, 0x852156ceu, 0x4e7d856bu, 0xc8e9f7c5u, 0x03b52460u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2570 0xf2e396b5u, 0x39bf4510u, 0xbf2b37beu, 0x7477e41bu, 0x6972d4a3u, 0xa22e0706u, 0x24ba75a8u, 0xefe6a60du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2571 0x1d661643u, 0xd63ac5e6u, 0x50aeb748u, 0x9bf264edu, 0x86f75455u, 0x4dab87f0u, 0xcb3ff55eu, 0x006326fbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2572 0xf135942eu, 0x3a69478bu, 0xbcfd3525u, 0x77a1e680u, 0x6aa4d638u, 0xa1f8059du, 0x276c7733u, 0xec30a496u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2573 0x191c11eeu, 0xd240c24bu, 0x54d4b0e5u, 0x9f886340u, 0x828d53f8u, 0x49d1805du, 0xcf45f2f3u, 0x04192156u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2574 0xf54f9383u, 0x3e134026u, 0xb8873288u, 0x73dbe12du, 0x6eded195u, 0xa5820230u, 0x2316709eu, 0xe84aa33bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2575 0x1aca1375u, 0xd196c0d0u, 0x5702b27eu, 0x9c5e61dbu, 0x815b5163u, 0x4a0782c6u, 0xcc93f068u, 0x07cf23cdu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2576 0xf6999118u, 0x3dc542bdu, 0xbb513013u, 0x700de3b6u, 0x6d08d30eu, 0xa65400abu, 0x20c07205u, 0xeb9ca1a0u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2577 0x11e81eb4u, 0xdab4cd11u, 0x5c20bfbfu, 0x977c6c1au, 0x8a795ca2u, 0x41258f07u, 0xc7b1fda9u, 0x0ced2e0cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2578 0xfdbb9cd9u, 0x36e74f7cu, 0xb0733dd2u, 0x7b2fee77u, 0x662adecfu, 0xad760d6au, 0x2be27fc4u, 0xe0beac61u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2579 0x123e1c2fu, 0xd962cf8au, 0x5ff6bd24u, 0x94aa6e81u, 0x89af5e39u, 0x42f38d9cu, 0xc467ff32u, 0x0f3b2c97u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2580 0xfe6d9e42u, 0x35314de7u, 0xb3a53f49u, 0x78f9ececu, 0x65fcdc54u, 0xaea00ff1u, 0x28347d5fu, 0xe368aefau,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2581 0x16441b82u, 0xdd18c827u, 0x5b8cba89u, 0x90d0692cu, 0x8dd55994u, 0x46898a31u, 0xc01df89fu, 0x0b412b3au,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2582 0xfa1799efu, 0x314b4a4au, 0xb7df38e4u, 0x7c83eb41u, 0x6186dbf9u, 0xaada085cu, 0x2c4e7af2u, 0xe712a957u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2583 0x15921919u, 0xdececabcu, 0x585ab812u, 0x93066bb7u, 0x8e035b0fu, 0x455f88aau, 0xc3cbfa04u, 0x089729a1u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2584 0xf9c19b74u, 0x329d48d1u, 0xb4093a7fu, 0x7f55e9dau, 0x6250d962u, 0xa90c0ac7u, 0x2f987869u, 0xe4c4abccu
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2585 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2586
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2587 static const unsigned lodepng_crc32_table6[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2588 0x00000000u, 0xa6770bb4u, 0x979f1129u, 0x31e81a9du, 0xf44f2413u, 0x52382fa7u, 0x63d0353au, 0xc5a73e8eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2589 0x33ef4e67u, 0x959845d3u, 0xa4705f4eu, 0x020754fau, 0xc7a06a74u, 0x61d761c0u, 0x503f7b5du, 0xf64870e9u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2590 0x67de9cceu, 0xc1a9977au, 0xf0418de7u, 0x56368653u, 0x9391b8ddu, 0x35e6b369u, 0x040ea9f4u, 0xa279a240u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2591 0x5431d2a9u, 0xf246d91du, 0xc3aec380u, 0x65d9c834u, 0xa07ef6bau, 0x0609fd0eu, 0x37e1e793u, 0x9196ec27u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2592 0xcfbd399cu, 0x69ca3228u, 0x582228b5u, 0xfe552301u, 0x3bf21d8fu, 0x9d85163bu, 0xac6d0ca6u, 0x0a1a0712u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2593 0xfc5277fbu, 0x5a257c4fu, 0x6bcd66d2u, 0xcdba6d66u, 0x081d53e8u, 0xae6a585cu, 0x9f8242c1u, 0x39f54975u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2594 0xa863a552u, 0x0e14aee6u, 0x3ffcb47bu, 0x998bbfcfu, 0x5c2c8141u, 0xfa5b8af5u, 0xcbb39068u, 0x6dc49bdcu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2595 0x9b8ceb35u, 0x3dfbe081u, 0x0c13fa1cu, 0xaa64f1a8u, 0x6fc3cf26u, 0xc9b4c492u, 0xf85cde0fu, 0x5e2bd5bbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2596 0x440b7579u, 0xe27c7ecdu, 0xd3946450u, 0x75e36fe4u, 0xb044516au, 0x16335adeu, 0x27db4043u, 0x81ac4bf7u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2597 0x77e43b1eu, 0xd19330aau, 0xe07b2a37u, 0x460c2183u, 0x83ab1f0du, 0x25dc14b9u, 0x14340e24u, 0xb2430590u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2598 0x23d5e9b7u, 0x85a2e203u, 0xb44af89eu, 0x123df32au, 0xd79acda4u, 0x71edc610u, 0x4005dc8du, 0xe672d739u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2599 0x103aa7d0u, 0xb64dac64u, 0x87a5b6f9u, 0x21d2bd4du, 0xe47583c3u, 0x42028877u, 0x73ea92eau, 0xd59d995eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2600 0x8bb64ce5u, 0x2dc14751u, 0x1c295dccu, 0xba5e5678u, 0x7ff968f6u, 0xd98e6342u, 0xe86679dfu, 0x4e11726bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2601 0xb8590282u, 0x1e2e0936u, 0x2fc613abu, 0x89b1181fu, 0x4c162691u, 0xea612d25u, 0xdb8937b8u, 0x7dfe3c0cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2602 0xec68d02bu, 0x4a1fdb9fu, 0x7bf7c102u, 0xdd80cab6u, 0x1827f438u, 0xbe50ff8cu, 0x8fb8e511u, 0x29cfeea5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2603 0xdf879e4cu, 0x79f095f8u, 0x48188f65u, 0xee6f84d1u, 0x2bc8ba5fu, 0x8dbfb1ebu, 0xbc57ab76u, 0x1a20a0c2u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2604 0x8816eaf2u, 0x2e61e146u, 0x1f89fbdbu, 0xb9fef06fu, 0x7c59cee1u, 0xda2ec555u, 0xebc6dfc8u, 0x4db1d47cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2605 0xbbf9a495u, 0x1d8eaf21u, 0x2c66b5bcu, 0x8a11be08u, 0x4fb68086u, 0xe9c18b32u, 0xd82991afu, 0x7e5e9a1bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2606 0xefc8763cu, 0x49bf7d88u, 0x78576715u, 0xde206ca1u, 0x1b87522fu, 0xbdf0599bu, 0x8c184306u, 0x2a6f48b2u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2607 0xdc27385bu, 0x7a5033efu, 0x4bb82972u, 0xedcf22c6u, 0x28681c48u, 0x8e1f17fcu, 0xbff70d61u, 0x198006d5u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2608 0x47abd36eu, 0xe1dcd8dau, 0xd034c247u, 0x7643c9f3u, 0xb3e4f77du, 0x1593fcc9u, 0x247be654u, 0x820cede0u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2609 0x74449d09u, 0xd23396bdu, 0xe3db8c20u, 0x45ac8794u, 0x800bb91au, 0x267cb2aeu, 0x1794a833u, 0xb1e3a387u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2610 0x20754fa0u, 0x86024414u, 0xb7ea5e89u, 0x119d553du, 0xd43a6bb3u, 0x724d6007u, 0x43a57a9au, 0xe5d2712eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2611 0x139a01c7u, 0xb5ed0a73u, 0x840510eeu, 0x22721b5au, 0xe7d525d4u, 0x41a22e60u, 0x704a34fdu, 0xd63d3f49u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2612 0xcc1d9f8bu, 0x6a6a943fu, 0x5b828ea2u, 0xfdf58516u, 0x3852bb98u, 0x9e25b02cu, 0xafcdaab1u, 0x09baa105u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2613 0xfff2d1ecu, 0x5985da58u, 0x686dc0c5u, 0xce1acb71u, 0x0bbdf5ffu, 0xadcafe4bu, 0x9c22e4d6u, 0x3a55ef62u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2614 0xabc30345u, 0x0db408f1u, 0x3c5c126cu, 0x9a2b19d8u, 0x5f8c2756u, 0xf9fb2ce2u, 0xc813367fu, 0x6e643dcbu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2615 0x982c4d22u, 0x3e5b4696u, 0x0fb35c0bu, 0xa9c457bfu, 0x6c636931u, 0xca146285u, 0xfbfc7818u, 0x5d8b73acu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2616 0x03a0a617u, 0xa5d7ada3u, 0x943fb73eu, 0x3248bc8au, 0xf7ef8204u, 0x519889b0u, 0x6070932du, 0xc6079899u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2617 0x304fe870u, 0x9638e3c4u, 0xa7d0f959u, 0x01a7f2edu, 0xc400cc63u, 0x6277c7d7u, 0x539fdd4au, 0xf5e8d6feu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2618 0x647e3ad9u, 0xc209316du, 0xf3e12bf0u, 0x55962044u, 0x90311ecau, 0x3646157eu, 0x07ae0fe3u, 0xa1d90457u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2619 0x579174beu, 0xf1e67f0au, 0xc00e6597u, 0x66796e23u, 0xa3de50adu, 0x05a95b19u, 0x34414184u, 0x92364a30u
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2620 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2621
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2622 static const unsigned lodepng_crc32_table7[256] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2623 0x00000000u, 0xccaa009eu, 0x4225077du, 0x8e8f07e3u, 0x844a0efau, 0x48e00e64u, 0xc66f0987u, 0x0ac50919u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2624 0xd3e51bb5u, 0x1f4f1b2bu, 0x91c01cc8u, 0x5d6a1c56u, 0x57af154fu, 0x9b0515d1u, 0x158a1232u, 0xd92012acu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2625 0x7cbb312bu, 0xb01131b5u, 0x3e9e3656u, 0xf23436c8u, 0xf8f13fd1u, 0x345b3f4fu, 0xbad438acu, 0x767e3832u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2626 0xaf5e2a9eu, 0x63f42a00u, 0xed7b2de3u, 0x21d12d7du, 0x2b142464u, 0xe7be24fau, 0x69312319u, 0xa59b2387u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2627 0xf9766256u, 0x35dc62c8u, 0xbb53652bu, 0x77f965b5u, 0x7d3c6cacu, 0xb1966c32u, 0x3f196bd1u, 0xf3b36b4fu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2628 0x2a9379e3u, 0xe639797du, 0x68b67e9eu, 0xa41c7e00u, 0xaed97719u, 0x62737787u, 0xecfc7064u, 0x205670fau,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2629 0x85cd537du, 0x496753e3u, 0xc7e85400u, 0x0b42549eu, 0x01875d87u, 0xcd2d5d19u, 0x43a25afau, 0x8f085a64u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2630 0x562848c8u, 0x9a824856u, 0x140d4fb5u, 0xd8a74f2bu, 0xd2624632u, 0x1ec846acu, 0x9047414fu, 0x5ced41d1u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2631 0x299dc2edu, 0xe537c273u, 0x6bb8c590u, 0xa712c50eu, 0xadd7cc17u, 0x617dcc89u, 0xeff2cb6au, 0x2358cbf4u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2632 0xfa78d958u, 0x36d2d9c6u, 0xb85dde25u, 0x74f7debbu, 0x7e32d7a2u, 0xb298d73cu, 0x3c17d0dfu, 0xf0bdd041u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2633 0x5526f3c6u, 0x998cf358u, 0x1703f4bbu, 0xdba9f425u, 0xd16cfd3cu, 0x1dc6fda2u, 0x9349fa41u, 0x5fe3fadfu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2634 0x86c3e873u, 0x4a69e8edu, 0xc4e6ef0eu, 0x084cef90u, 0x0289e689u, 0xce23e617u, 0x40ace1f4u, 0x8c06e16au,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2635 0xd0eba0bbu, 0x1c41a025u, 0x92cea7c6u, 0x5e64a758u, 0x54a1ae41u, 0x980baedfu, 0x1684a93cu, 0xda2ea9a2u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2636 0x030ebb0eu, 0xcfa4bb90u, 0x412bbc73u, 0x8d81bcedu, 0x8744b5f4u, 0x4beeb56au, 0xc561b289u, 0x09cbb217u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2637 0xac509190u, 0x60fa910eu, 0xee7596edu, 0x22df9673u, 0x281a9f6au, 0xe4b09ff4u, 0x6a3f9817u, 0xa6959889u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2638 0x7fb58a25u, 0xb31f8abbu, 0x3d908d58u, 0xf13a8dc6u, 0xfbff84dfu, 0x37558441u, 0xb9da83a2u, 0x7570833cu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2639 0x533b85dau, 0x9f918544u, 0x111e82a7u, 0xddb48239u, 0xd7718b20u, 0x1bdb8bbeu, 0x95548c5du, 0x59fe8cc3u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2640 0x80de9e6fu, 0x4c749ef1u, 0xc2fb9912u, 0x0e51998cu, 0x04949095u, 0xc83e900bu, 0x46b197e8u, 0x8a1b9776u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2641 0x2f80b4f1u, 0xe32ab46fu, 0x6da5b38cu, 0xa10fb312u, 0xabcaba0bu, 0x6760ba95u, 0xe9efbd76u, 0x2545bde8u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2642 0xfc65af44u, 0x30cfafdau, 0xbe40a839u, 0x72eaa8a7u, 0x782fa1beu, 0xb485a120u, 0x3a0aa6c3u, 0xf6a0a65du,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2643 0xaa4de78cu, 0x66e7e712u, 0xe868e0f1u, 0x24c2e06fu, 0x2e07e976u, 0xe2ade9e8u, 0x6c22ee0bu, 0xa088ee95u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2644 0x79a8fc39u, 0xb502fca7u, 0x3b8dfb44u, 0xf727fbdau, 0xfde2f2c3u, 0x3148f25du, 0xbfc7f5beu, 0x736df520u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2645 0xd6f6d6a7u, 0x1a5cd639u, 0x94d3d1dau, 0x5879d144u, 0x52bcd85du, 0x9e16d8c3u, 0x1099df20u, 0xdc33dfbeu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2646 0x0513cd12u, 0xc9b9cd8cu, 0x4736ca6fu, 0x8b9ccaf1u, 0x8159c3e8u, 0x4df3c376u, 0xc37cc495u, 0x0fd6c40bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2647 0x7aa64737u, 0xb60c47a9u, 0x3883404au, 0xf42940d4u, 0xfeec49cdu, 0x32464953u, 0xbcc94eb0u, 0x70634e2eu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2648 0xa9435c82u, 0x65e95c1cu, 0xeb665bffu, 0x27cc5b61u, 0x2d095278u, 0xe1a352e6u, 0x6f2c5505u, 0xa386559bu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2649 0x061d761cu, 0xcab77682u, 0x44387161u, 0x889271ffu, 0x825778e6u, 0x4efd7878u, 0xc0727f9bu, 0x0cd87f05u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2650 0xd5f86da9u, 0x19526d37u, 0x97dd6ad4u, 0x5b776a4au, 0x51b26353u, 0x9d1863cdu, 0x1397642eu, 0xdf3d64b0u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2651 0x83d02561u, 0x4f7a25ffu, 0xc1f5221cu, 0x0d5f2282u, 0x079a2b9bu, 0xcb302b05u, 0x45bf2ce6u, 0x89152c78u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2652 0x50353ed4u, 0x9c9f3e4au, 0x121039a9u, 0xdeba3937u, 0xd47f302eu, 0x18d530b0u, 0x965a3753u, 0x5af037cdu,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2653 0xff6b144au, 0x33c114d4u, 0xbd4e1337u, 0x71e413a9u, 0x7b211ab0u, 0xb78b1a2eu, 0x39041dcdu, 0xf5ae1d53u,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2654 0x2c8e0fffu, 0xe0240f61u, 0x6eab0882u, 0xa201081cu, 0xa8c40105u, 0x646e019bu, 0xeae10678u, 0x264b06e6u
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2655 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2656
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2657 /* Computes the cyclic redundancy check as used by PNG chunks*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2658 unsigned lodepng_crc32(const unsigned char* data, size_t length) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2659 /Using the Slicing by Eight algorithm/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2660 unsigned r = 0xffffffffu;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2661 while(length >= 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2662 r = lodepng_crc32_table7[(data[0] ^ (r & 0xffu))] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2663 lodepng_crc32_table6[(data[1] ^ ((r >> 8) & 0xffu))] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2664 lodepng_crc32_table5[(data[2] ^ ((r >> 16) & 0xffu))] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2665 lodepng_crc32_table4[(data[3] ^ ((r >> 24) & 0xffu))] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2666 lodepng_crc32_table3[data[4]] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2667 lodepng_crc32_table2[data[5]] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2668 lodepng_crc32_table1[data[6]] ^
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2669 lodepng_crc32_table0[data[7]];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2670 data += 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2671 length -= 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2672 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2673 while(length--) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2674 r = lodepng_crc32_table0[(r ^ *data++) & 0xffu] ^ (r >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2675 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2676 return r ^ 0xffffffffu;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2677 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2678 #else /* LODEPNG_COMPILE_CRC */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2679 /*in this case, the function is only declared here, and must be defined externally
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2680 so that it will be linked in.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2681
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2682 Example implementation that uses a much smaller lookup table for memory constrained cases:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2683
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2684 unsigned lodepng_crc32(const unsigned char* data, size_t length) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2685 unsigned r = 0xffffffffu;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2686 static const unsigned table[16] = {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2687 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2688 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2689 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2690 while(length--) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2691 r = table[(r ^ *data) & 0xf] ^ (r >> 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2692 r = table[(r ^ (*data >> 4)) & 0xf] ^ (r >> 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2693 data++;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2694 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2695 return r ^ 0xffffffffu;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2696 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2697 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2698 unsigned lodepng_crc32(const unsigned char* data, size_t length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2699 #endif /* LODEPNG_COMPILE_CRC */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2700
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2701 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2702 /* / Reading and writing PNG color channel bits / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2703 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2704
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2705 /* The color channel bits of less-than-8-bit pixels are read with the MSB of bytes first,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2706 so LodePNGBitWriter and LodePNGBitReader can't be used for those. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2707
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2708 static unsigned char readBitFromReversedStream(size_t* bitpointer, const unsigned char* bitstream) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2709 unsigned char result = (unsigned char)((bitstream[(bitpointer) >> 3] >> (7 - ((bitpointer) & 0x7))) & 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2710 ++(*bitpointer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2711 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2712 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2713
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2714 /* TODO: make this faster */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2715 static unsigned readBitsFromReversedStream(size_t* bitpointer, const unsigned char* bitstream, size_t nbits) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2716 unsigned result = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2717 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2718 for(i = 0 ; i < nbits; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2719 result <<= 1u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2720 result \|= (unsigned)readBitFromReversedStream(bitpointer, bitstream);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2721 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2722 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2723 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2724
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2725 static void setBitOfReversedStream(size_t* bitpointer, unsigned char* bitstream, unsigned char bit) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2726 /the current bit in bitstream may be 0 or 1 for this to work/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2727 if(bit == 0) bitstream[(bitpointer) >> 3u] &= (unsigned char)(~(1u << (7u - ((bitpointer) & 7u))));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2728 else bitstream[(bitpointer) >> 3u] \|= (1u << (7u - ((bitpointer) & 7u)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2729 ++(*bitpointer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2730 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2731
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2732 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2733 /* / PNG chunks / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2734 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2735
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2736 unsigned lodepng_chunk_length(const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2737 return lodepng_read32bitInt(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2738 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2739
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2740 void lodepng_chunk_type(char type[5], const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2741 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2742 for(i = 0; i != 4; ++i) type[i] = (char)chunk[4 + i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2743 type[4] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2744 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2745
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2746 unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2747 if(lodepng_strlen(type) != 4) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2748 return (chunk[4] == type[0] && chunk[5] == type[1] && chunk[6] == type[2] && chunk[7] == type[3]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2749 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2750
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2751 unsigned char lodepng_chunk_ancillary(const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2752 return((chunk[4] & 32) != 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2753 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2754
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2755 unsigned char lodepng_chunk_private(const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2756 return((chunk[6] & 32) != 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2757 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2758
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2759 unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2760 return((chunk[7] & 32) != 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2761 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2762
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2763 unsigned char* lodepng_chunk_data(unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2764 return &chunk[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2765 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2766
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2767 const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2768 return &chunk[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2769 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2770
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2771 unsigned lodepng_chunk_check_crc(const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2772 unsigned length = lodepng_chunk_length(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2773 unsigned CRC = lodepng_read32bitInt(&chunk[length + 8]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2774 /the CRC is taken of the data and the 4 chunk type letters, not the length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2775 unsigned checksum = lodepng_crc32(&chunk[4], length + 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2776 if(CRC != checksum) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2777 else return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2778 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2779
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2780 void lodepng_chunk_generate_crc(unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2781 unsigned length = lodepng_chunk_length(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2782 unsigned CRC = lodepng_crc32(&chunk[4], length + 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2783 lodepng_set32bitInt(chunk + 8 + length, CRC);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2784 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2785
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2786 unsigned char* lodepng_chunk_next(unsigned char* chunk, unsigned char* end) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2787 size_t available_size = (size_t)(end - chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2788 if(chunk >= end \|\| available_size < 12) return end; /too small to contain a chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2789 if(chunk[0] == 0x89 && chunk[1] == 0x50 && chunk[2] == 0x4e && chunk[3] == 0x47
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2790 && chunk[4] == 0x0d && chunk[5] == 0x0a && chunk[6] == 0x1a && chunk[7] == 0x0a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2791 /* Is PNG magic header at start of PNG file. Jump to first actual chunk. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2792 return chunk + 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2793 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2794 size_t total_chunk_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2795 if(lodepng_addofl(lodepng_chunk_length(chunk), 12, &total_chunk_length)) return end;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2796 if(total_chunk_length > available_size) return end; /outside of range/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2797 return chunk + total_chunk_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2798 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2799 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2800
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2801 const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk, const unsigned char* end) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2802 size_t available_size = (size_t)(end - chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2803 if(chunk >= end \|\| available_size < 12) return end; /too small to contain a chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2804 if(chunk[0] == 0x89 && chunk[1] == 0x50 && chunk[2] == 0x4e && chunk[3] == 0x47
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2805 && chunk[4] == 0x0d && chunk[5] == 0x0a && chunk[6] == 0x1a && chunk[7] == 0x0a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2806 /* Is PNG magic header at start of PNG file. Jump to first actual chunk. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2807 return chunk + 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2808 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2809 size_t total_chunk_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2810 if(lodepng_addofl(lodepng_chunk_length(chunk), 12, &total_chunk_length)) return end;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2811 if(total_chunk_length > available_size) return end; /outside of range/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2812 return chunk + total_chunk_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2813 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2814 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2815
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2816 unsigned char* lodepng_chunk_find(unsigned char* chunk, unsigned char* end, const char type[5]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2817 for(;;) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2818 if(chunk >= end \|\| end - chunk < 12) return 0; /* past file end: chunk + 12 > end */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2819 if(lodepng_chunk_type_equals(chunk, type)) return chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2820 chunk = lodepng_chunk_next(chunk, end);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2821 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2822 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2823
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2824 const unsigned char* lodepng_chunk_find_const(const unsigned char* chunk, const unsigned char* end, const char type[5]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2825 for(;;) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2826 if(chunk >= end \|\| end - chunk < 12) return 0; /* past file end: chunk + 12 > end */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2827 if(lodepng_chunk_type_equals(chunk, type)) return chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2828 chunk = lodepng_chunk_next_const(chunk, end);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2829 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2830 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2831
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2832 unsigned lodepng_chunk_append(unsigned char** out, size_t* outsize, const unsigned char* chunk) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2833 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2834 size_t total_chunk_length, new_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2835 unsigned char chunk_start, new_buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2836
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2837 if(lodepng_addofl(lodepng_chunk_length(chunk), 12, &total_chunk_length)) return 77;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2838 if(lodepng_addofl(*outsize, total_chunk_length, &new_length)) return 77;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2839
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2840 new_buffer = (unsigned char)lodepng_realloc(out, new_length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2841 if(!new_buffer) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2842 (*out) = new_buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2843 (*outsize) = new_length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2844 chunk_start = &(*out)[new_length - total_chunk_length];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2845
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2846 for(i = 0; i != total_chunk_length; ++i) chunk_start[i] = chunk[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2847
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2848 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2849 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2850
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2851 /*Sets length and name and allocates the space for data and crc but does not
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2852 set data or crc yet. Returns the start of the chunk in chunk. The start of
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2853 the data is at chunk + 8. To finalize chunk, add the data, then use
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2854 lodepng_chunk_generate_crc */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2855 static unsigned lodepng_chunk_init(unsigned char** chunk,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2856 ucvector* out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2857 unsigned length, const char* type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2858 size_t new_length = out->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2859 if(lodepng_addofl(new_length, length, &new_length)) return 77;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2860 if(lodepng_addofl(new_length, 12, &new_length)) return 77;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2861 if(!ucvector_resize(out, new_length)) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2862 *chunk = out->data + new_length - length - 12u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2863
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2864 /1: length/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2865 lodepng_set32bitInt(*chunk, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2866
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2867 /2: chunk name (4 letters)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2868 lodepng_memcpy(*chunk + 4, type, 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2869
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2870 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2871 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2872
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2873 /* like lodepng_chunk_create but with custom allocsize */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2874 static unsigned lodepng_chunk_createv(ucvector* out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2875 unsigned length, const char* type, const unsigned char* data) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2876 unsigned char* chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2877 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, length, type));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2878
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2879 /3: the data/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2880 lodepng_memcpy(chunk + 8, data, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2881
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2882 /4: CRC (of the chunkname characters and the data)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2883 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2884
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2885 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2886 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2887
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2888 unsigned lodepng_chunk_create(unsigned char** out, size_t* outsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2889 unsigned length, const char* type, const unsigned char* data) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2890 ucvector v = ucvector_init(out, outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2891 unsigned error = lodepng_chunk_createv(&v, length, type, data);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2892 *out = v.data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2893 *outsize = v.size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2894 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2895 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2896
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2897 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2898 /* / Color types, channels, bits / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2899 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2900
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2901 /*checks if the colortype is valid and the bitdepth bd is allowed for this colortype.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2902 Return value is a LodePNG error code.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2903 static unsigned checkColorValidity(LodePNGColorType colortype, unsigned bd) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2904 switch(colortype) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2905 case LCT_GREY: if(!(bd == 1 \|\| bd == 2 \|\| bd == 4 \|\| bd == 8 \|\| bd == 16)) return 37; break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2906 case LCT_RGB: if(!( bd == 8 \|\| bd == 16)) return 37; break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2907 case LCT_PALETTE: if(!(bd == 1 \|\| bd == 2 \|\| bd == 4 \|\| bd == 8 )) return 37; break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2908 case LCT_GREY_ALPHA: if(!( bd == 8 \|\| bd == 16)) return 37; break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2909 case LCT_RGBA: if(!( bd == 8 \|\| bd == 16)) return 37; break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2910 case LCT_MAX_OCTET_VALUE: return 31; /* invalid color type */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2911 default: return 31; /* invalid color type */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2912 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2913 return 0; /allowed color type / bits combination/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2914 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2915
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2916 static unsigned getNumColorChannels(LodePNGColorType colortype) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2917 switch(colortype) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2918 case LCT_GREY: return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2919 case LCT_RGB: return 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2920 case LCT_PALETTE: return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2921 case LCT_GREY_ALPHA: return 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2922 case LCT_RGBA: return 4;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2923 case LCT_MAX_OCTET_VALUE: return 0; /* invalid color type */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2924 default: return 0; /invalid color type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2925 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2926 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2927
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2928 static unsigned lodepng_get_bpp_lct(LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2929 /bits per pixel is amount of channels bits per channel*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2930 return getNumColorChannels(colortype) * bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2931 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2932
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2933 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2934
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2935 void lodepng_color_mode_init(LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2936 info->key_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2937 info->key_r = info->key_g = info->key_b = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2938 info->colortype = LCT_RGBA;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2939 info->bitdepth = 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2940 info->palette = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2941 info->palettesize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2942 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2943
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2944 /allocates palette memory if needed, and initializes all colors to black/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2945 static void lodepng_color_mode_alloc_palette(LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2946 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2947 /if the palette is already allocated, it will have size 1024 so no reallocation needed in that case/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2948 /the palette must have room for up to 256 colors with 4 bytes each./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2949 if(!info->palette) info->palette = (unsigned char*)lodepng_malloc(1024);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2950 if(!info->palette) return; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2951 for(i = 0; i != 256; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2952 /*Initialize all unused colors with black, the value used for invalid palette indices.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2953 This is an error according to the PNG spec, but common PNG decoders make it black instead.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2954 That makes color conversion slightly faster due to no error handling needed.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2955 info->palette[i * 4 + 0] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2956 info->palette[i * 4 + 1] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2957 info->palette[i * 4 + 2] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2958 info->palette[i * 4 + 3] = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2959 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2960 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2961
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2962 void lodepng_color_mode_cleanup(LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2963 lodepng_palette_clear(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2964 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2965
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2966 unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2967 lodepng_color_mode_cleanup(dest);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2968 lodepng_memcpy(dest, source, sizeof(LodePNGColorMode));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2969 if(source->palette) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2970 dest->palette = (unsigned char*)lodepng_malloc(1024);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2971 if(!dest->palette && source->palettesize) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2972 lodepng_memcpy(dest->palette, source->palette, source->palettesize * 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2973 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2974 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2975 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2976
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2977 LodePNGColorMode lodepng_color_mode_make(LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2978 LodePNGColorMode result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2979 lodepng_color_mode_init(&result);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2980 result.colortype = colortype;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2981 result.bitdepth = bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2982 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2983 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2984
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2985 static int lodepng_color_mode_equal(const LodePNGColorMode* a, const LodePNGColorMode* b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2986 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2987 if(a->colortype != b->colortype) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2988 if(a->bitdepth != b->bitdepth) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2989 if(a->key_defined != b->key_defined) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2990 if(a->key_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2991 if(a->key_r != b->key_r) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2992 if(a->key_g != b->key_g) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2993 if(a->key_b != b->key_b) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2994 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2995 if(a->palettesize != b->palettesize) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2996 for(i = 0; i != a->palettesize * 4; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2997 if(a->palette[i] != b->palette[i]) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2998 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	2999 return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3000 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3001
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3002 void lodepng_palette_clear(LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3003 if(info->palette) lodepng_free(info->palette);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3004 info->palette = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3005 info->palettesize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3006 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3007
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3008 unsigned lodepng_palette_add(LodePNGColorMode* info,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3009 unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3010 if(!info->palette) /allocate palette if empty/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3011 lodepng_color_mode_alloc_palette(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3012 if(!info->palette) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3013 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3014 if(info->palettesize >= 256) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3015 return 108; /too many palette values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3016 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3017 info->palette[4 * info->palettesize + 0] = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3018 info->palette[4 * info->palettesize + 1] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3019 info->palette[4 * info->palettesize + 2] = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3020 info->palette[4 * info->palettesize + 3] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3021 ++info->palettesize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3022 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3023 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3024
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3025 /calculate bits per pixel out of colortype and bitdepth/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3026 unsigned lodepng_get_bpp(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3027 return lodepng_get_bpp_lct(info->colortype, info->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3028 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3029
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3030 unsigned lodepng_get_channels(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3031 return getNumColorChannels(info->colortype);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3032 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3033
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3034 unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3035 return info->colortype == LCT_GREY \|\| info->colortype == LCT_GREY_ALPHA;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3036 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3037
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3038 unsigned lodepng_is_alpha_type(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3039 return (info->colortype & 4) != 0; /4 or 6/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3040 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3041
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3042 unsigned lodepng_is_palette_type(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3043 return info->colortype == LCT_PALETTE;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3044 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3045
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3046 unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3047 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3048 for(i = 0; i != info->palettesize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3049 if(info->palette[i * 4 + 3] < 255) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3050 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3051 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3052 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3053
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3054 unsigned lodepng_can_have_alpha(const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3055 return info->key_defined
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3056 \|\| lodepng_is_alpha_type(info)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3057 \|\| lodepng_has_palette_alpha(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3058 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3059
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3060 static size_t lodepng_get_raw_size_lct(unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3061 size_t bpp = lodepng_get_bpp_lct(colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3062 size_t n = (size_t)w * (size_t)h;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3063 return ((n / 8u) * bpp) + ((n & 7u) * bpp + 7u) / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3064 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3065
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3066 size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3067 return lodepng_get_raw_size_lct(w, h, color->colortype, color->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3068 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3069
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3070
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3071 #ifdef LODEPNG_COMPILE_PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3072
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3073 /*in an idat chunk, each scanline is a multiple of 8 bits, unlike the lodepng output buffer,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3074 and in addition has one extra byte per line: the filter byte. So this gives a larger
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3075 result than lodepng_get_raw_size. Set h to 1 to get the size of 1 row including filter byte. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3076 static size_t lodepng_get_raw_size_idat(unsigned w, unsigned h, unsigned bpp) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3077 /* + 1 for the filter byte, and possibly plus padding bits per line. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3078 /* Ignoring casts, the expression is equal to (w * bpp + 7) / 8 + 1, but avoids overflow of w * bpp */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3079 size_t line = ((size_t)(w / 8u) * bpp) + 1u + ((w & 7u) * bpp + 7u) / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3080 return (size_t)h * line;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3081 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3082
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3083 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3084 /*Safely checks whether size_t overflow can be caused due to amount of pixels.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3085 This check is overcautious rather than precise. If this check indicates no overflow,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3086 you can safely compute in a size_t (but not an unsigned):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3087 -(size_t)w * (size_t)h * 8
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3088 -amount of bytes in IDAT (including filter, padding and Adam7 bytes)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3089 -amount of bytes in raw color model
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3090 Returns 1 if overflow possible, 0 if not.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3091 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3092 static int lodepng_pixel_overflow(unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3093 const LodePNGColorMode* pngcolor, const LodePNGColorMode* rawcolor) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3094 size_t bpp = LODEPNG_MAX(lodepng_get_bpp(pngcolor), lodepng_get_bpp(rawcolor));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3095 size_t numpixels, total;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3096 size_t line; /* bytes per line in worst case */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3097
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3098 if(lodepng_mulofl((size_t)w, (size_t)h, &numpixels)) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3099 if(lodepng_mulofl(numpixels, 8, &total)) return 1; /* bit pointer with 8-bit color, or 8 bytes per channel color */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3100
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3101 /* Bytes per scanline with the expression "(w / 8u) * bpp) + ((w & 7u) * bpp + 7u) / 8u" */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3102 if(lodepng_mulofl((size_t)(w / 8u), bpp, &line)) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3103 if(lodepng_addofl(line, ((w & 7u) * bpp + 7u) / 8u, &line)) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3104
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3105 if(lodepng_addofl(line, 5, &line)) return 1; /* 5 bytes overhead per line: 1 filterbyte, 4 for Adam7 worst case */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3106 if(lodepng_mulofl(line, h, &total)) return 1; /* Total bytes in worst case */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3107
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3108 return 0; /* no overflow */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3109 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3110 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3111 #endif /LODEPNG_COMPILE_PNG/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3112
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3113 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3114
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3115 static void LodePNGUnknownChunks_init(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3116 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3117 for(i = 0; i != 3; ++i) info->unknown_chunks_data[i] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3118 for(i = 0; i != 3; ++i) info->unknown_chunks_size[i] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3119 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3120
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3121 static void LodePNGUnknownChunks_cleanup(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3122 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3123 for(i = 0; i != 3; ++i) lodepng_free(info->unknown_chunks_data[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3124 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3125
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3126 static unsigned LodePNGUnknownChunks_copy(LodePNGInfo* dest, const LodePNGInfo* src) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3127 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3128
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3129 LodePNGUnknownChunks_cleanup(dest);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3130
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3131 for(i = 0; i != 3; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3132 size_t j;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3133 dest->unknown_chunks_size[i] = src->unknown_chunks_size[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3134 dest->unknown_chunks_data[i] = (unsigned char*)lodepng_malloc(src->unknown_chunks_size[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3135 if(!dest->unknown_chunks_data[i] && dest->unknown_chunks_size[i]) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3136 for(j = 0; j < src->unknown_chunks_size[i]; ++j) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3137 dest->unknown_chunks_data[i][j] = src->unknown_chunks_data[i][j];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3138 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3139 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3140
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3141 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3142 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3143
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3144 /******************************************************************************/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3145
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3146 static void LodePNGText_init(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3147 info->text_num = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3148 info->text_keys = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3149 info->text_strings = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3150 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3151
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3152 static void LodePNGText_cleanup(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3153 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3154 for(i = 0; i != info->text_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3155 string_cleanup(&info->text_keys[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3156 string_cleanup(&info->text_strings[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3157 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3158 lodepng_free(info->text_keys);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3159 lodepng_free(info->text_strings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3160 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3161
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3162 static unsigned LodePNGText_copy(LodePNGInfo* dest, const LodePNGInfo* source) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3163 size_t i = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3164 dest->text_keys = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3165 dest->text_strings = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3166 dest->text_num = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3167 for(i = 0; i != source->text_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3168 CERROR_TRY_RETURN(lodepng_add_text(dest, source->text_keys[i], source->text_strings[i]));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3169 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3170 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3171 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3172
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3173 static unsigned lodepng_add_text_sized(LodePNGInfo* info, const char* key, const char* str, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3174 char new_keys = (char)(lodepng_realloc(info->text_keys, sizeof(char) (info->text_num + 1)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3175 char new_strings = (char)(lodepng_realloc(info->text_strings, sizeof(char) (info->text_num + 1)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3176
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3177 if(new_keys) info->text_keys = new_keys;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3178 if(new_strings) info->text_strings = new_strings;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3179
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3180 if(!new_keys \|\| !new_strings) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3181
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3182 ++info->text_num;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3183 info->text_keys[info->text_num - 1] = alloc_string(key);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3184 info->text_strings[info->text_num - 1] = alloc_string_sized(str, size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3185 if(!info->text_keys[info->text_num - 1] \|\| !info->text_strings[info->text_num - 1]) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3186
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3187 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3188 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3189
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3190 unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3191 return lodepng_add_text_sized(info, key, str, lodepng_strlen(str));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3192 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3193
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3194 void lodepng_clear_text(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3195 LodePNGText_cleanup(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3196 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3197
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3198 /******************************************************************************/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3199
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3200 static void LodePNGIText_init(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3201 info->itext_num = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3202 info->itext_keys = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3203 info->itext_langtags = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3204 info->itext_transkeys = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3205 info->itext_strings = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3206 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3207
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3208 static void LodePNGIText_cleanup(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3209 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3210 for(i = 0; i != info->itext_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3211 string_cleanup(&info->itext_keys[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3212 string_cleanup(&info->itext_langtags[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3213 string_cleanup(&info->itext_transkeys[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3214 string_cleanup(&info->itext_strings[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3215 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3216 lodepng_free(info->itext_keys);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3217 lodepng_free(info->itext_langtags);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3218 lodepng_free(info->itext_transkeys);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3219 lodepng_free(info->itext_strings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3220 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3221
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3222 static unsigned LodePNGIText_copy(LodePNGInfo* dest, const LodePNGInfo* source) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3223 size_t i = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3224 dest->itext_keys = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3225 dest->itext_langtags = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3226 dest->itext_transkeys = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3227 dest->itext_strings = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3228 dest->itext_num = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3229 for(i = 0; i != source->itext_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3230 CERROR_TRY_RETURN(lodepng_add_itext(dest, source->itext_keys[i], source->itext_langtags[i],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3231 source->itext_transkeys[i], source->itext_strings[i]));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3232 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3233 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3234 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3235
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3236 void lodepng_clear_itext(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3237 LodePNGIText_cleanup(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3238 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3239
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3240 static unsigned lodepng_add_itext_sized(LodePNGInfo* info, const char* key, const char* langtag,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3241 const char* transkey, const char* str, size_t size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3242 char new_keys = (char)(lodepng_realloc(info->itext_keys, sizeof(char) (info->itext_num + 1)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3243 char new_langtags = (char)(lodepng_realloc(info->itext_langtags, sizeof(char) (info->itext_num + 1)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3244 char new_transkeys = (char)(lodepng_realloc(info->itext_transkeys, sizeof(char) (info->itext_num + 1)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3245 char new_strings = (char)(lodepng_realloc(info->itext_strings, sizeof(char) (info->itext_num + 1)));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3246
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3247 if(new_keys) info->itext_keys = new_keys;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3248 if(new_langtags) info->itext_langtags = new_langtags;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3249 if(new_transkeys) info->itext_transkeys = new_transkeys;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3250 if(new_strings) info->itext_strings = new_strings;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3251
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3252 if(!new_keys \|\| !new_langtags \|\| !new_transkeys \|\| !new_strings) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3253
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3254 ++info->itext_num;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3255
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3256 info->itext_keys[info->itext_num - 1] = alloc_string(key);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3257 info->itext_langtags[info->itext_num - 1] = alloc_string(langtag);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3258 info->itext_transkeys[info->itext_num - 1] = alloc_string(transkey);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3259 info->itext_strings[info->itext_num - 1] = alloc_string_sized(str, size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3260
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3261 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3262 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3263
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3264 unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3265 const char* transkey, const char* str) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3266 return lodepng_add_itext_sized(info, key, langtag, transkey, str, lodepng_strlen(str));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3267 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3268
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3269 /* same as set but does not delete */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3270 static unsigned lodepng_assign_icc(LodePNGInfo* info, const char* name, const unsigned char* profile, unsigned profile_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3271 if(profile_size == 0) return 100; /invalid ICC profile size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3272
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3273 info->iccp_name = alloc_string(name);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3274 info->iccp_profile = (unsigned char*)lodepng_malloc(profile_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3275
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3276 if(!info->iccp_name \|\| !info->iccp_profile) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3277
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3278 lodepng_memcpy(info->iccp_profile, profile, profile_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3279 info->iccp_profile_size = profile_size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3280
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3281 return 0; /ok/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3282 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3283
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3284 unsigned lodepng_set_icc(LodePNGInfo* info, const char* name, const unsigned char* profile, unsigned profile_size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3285 if(info->iccp_name) lodepng_clear_icc(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3286 info->iccp_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3287
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3288 return lodepng_assign_icc(info, name, profile, profile_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3289 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3290
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3291 void lodepng_clear_icc(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3292 string_cleanup(&info->iccp_name);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3293 lodepng_free(info->iccp_profile);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3294 info->iccp_profile = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3295 info->iccp_profile_size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3296 info->iccp_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3297 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3298 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3299
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3300 void lodepng_info_init(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3301 lodepng_color_mode_init(&info->color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3302 info->interlace_method = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3303 info->compression_method = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3304 info->filter_method = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3305 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3306 info->background_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3307 info->background_r = info->background_g = info->background_b = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3308
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3309 LodePNGText_init(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3310 LodePNGIText_init(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3311
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3312 info->time_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3313 info->phys_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3314
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3315 info->gama_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3316 info->chrm_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3317 info->srgb_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3318 info->iccp_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3319 info->iccp_name = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3320 info->iccp_profile = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3321
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3322 info->sbit_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3323 info->sbit_r = info->sbit_g = info->sbit_b = info->sbit_a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3324
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3325 LodePNGUnknownChunks_init(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3326 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3327 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3328
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3329 void lodepng_info_cleanup(LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3330 lodepng_color_mode_cleanup(&info->color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3331 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3332 LodePNGText_cleanup(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3333 LodePNGIText_cleanup(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3334
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3335 lodepng_clear_icc(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3336
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3337 LodePNGUnknownChunks_cleanup(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3338 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3339 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3340
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3341 unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3342 lodepng_info_cleanup(dest);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3343 lodepng_memcpy(dest, source, sizeof(LodePNGInfo));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3344 lodepng_color_mode_init(&dest->color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3345 CERROR_TRY_RETURN(lodepng_color_mode_copy(&dest->color, &source->color));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3346
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3347 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3348 CERROR_TRY_RETURN(LodePNGText_copy(dest, source));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3349 CERROR_TRY_RETURN(LodePNGIText_copy(dest, source));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3350 if(source->iccp_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3351 CERROR_TRY_RETURN(lodepng_assign_icc(dest, source->iccp_name, source->iccp_profile, source->iccp_profile_size));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3352 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3353
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3354 LodePNGUnknownChunks_init(dest);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3355 CERROR_TRY_RETURN(LodePNGUnknownChunks_copy(dest, source));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3356 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3357 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3358 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3359
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3360 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3361
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3362 /index: bitgroup index, bits: bitgroup size(1, 2 or 4), in: bitgroup value, out: octet array to add bits to/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3363 static void addColorBits(unsigned char* out, size_t index, unsigned bits, unsigned in) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3364 unsigned m = bits == 1 ? 7 : bits == 2 ? 3 : 1; /8 / bits - 1/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3365 /p = the partial index in the byte, e.g. with 4 palettebits it is 0 for first half or 1 for second half/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3366 unsigned p = index & m;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3367 in &= (1u << bits) - 1u; /filter out any other bits of the input value/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3368 in = in << (bits * (m - p));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3369 if(p == 0) out[index * bits / 8u] = in;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3370 else out[index * bits / 8u] \|= in;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3371 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3372
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3373 typedef struct ColorTree ColorTree;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3374
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3375 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3376 One node of a color tree
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3377 This is the data structure used to count the number of unique colors and to get a palette
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3378 index for a color. It's like an octree, but because the alpha channel is used too, each
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3379 node has 16 instead of 8 children.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3380 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3381 struct ColorTree {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3382 ColorTree* children[16]; /up to 16 pointers to ColorTree of next level/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3383 int index; /the payload. Only has a meaningful value if this is in the last level/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3384 };
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3385
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3386 static void color_tree_init(ColorTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3387 lodepng_memset(tree->children, 0, 16 * sizeof(*tree->children));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3388 tree->index = -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3389 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3390
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3391 static void color_tree_cleanup(ColorTree* tree) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3392 int i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3393 for(i = 0; i != 16; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3394 if(tree->children[i]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3395 color_tree_cleanup(tree->children[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3396 lodepng_free(tree->children[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3397 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3398 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3399 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3400
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3401 /returns -1 if color not present, its index otherwise/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3402 static int color_tree_get(ColorTree* tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3403 int bit = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3404 for(bit = 0; bit < 8; ++bit) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3405 int i = 8 * ((r >> bit) & 1) + 4 * ((g >> bit) & 1) + 2 * ((b >> bit) & 1) + 1 * ((a >> bit) & 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3406 if(!tree->children[i]) return -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3407 else tree = tree->children[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3408 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3409 return tree ? tree->index : -1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3410 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3411
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3412 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3413 static int color_tree_has(ColorTree* tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3414 return color_tree_get(tree, r, g, b, a) >= 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3415 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3416 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3417
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3418 /*color is not allowed to already exist.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3419 Index should be >= 0 (it's signed to be compatible with using -1 for "doesn't exist")
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3420 Returns error code, or 0 if ok*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3421 static unsigned color_tree_add(ColorTree* tree,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3422 unsigned char r, unsigned char g, unsigned char b, unsigned char a, unsigned index) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3423 int bit;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3424 for(bit = 0; bit < 8; ++bit) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3425 int i = 8 * ((r >> bit) & 1) + 4 * ((g >> bit) & 1) + 2 * ((b >> bit) & 1) + 1 * ((a >> bit) & 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3426 if(!tree->children[i]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3427 tree->children[i] = (ColorTree*)lodepng_malloc(sizeof(ColorTree));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3428 if(!tree->children[i]) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3429 color_tree_init(tree->children[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3430 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3431 tree = tree->children[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3432 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3433 tree->index = (int)index;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3434 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3435 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3436
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3437 /put a pixel, given its RGBA color, into image of any color type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3438 static unsigned rgba8ToPixel(unsigned char* out, size_t i,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3439 const LodePNGColorMode* mode, ColorTree* tree /for palette/,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3440 unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3441 if(mode->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3442 unsigned char gray = r; /((unsigned short)r + g + b) / 3u;/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3443 if(mode->bitdepth == 8) out[i] = gray;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3444 else if(mode->bitdepth == 16) out[i * 2 + 0] = out[i * 2 + 1] = gray;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3445 else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3446 /take the most significant bits of gray/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3447 gray = ((unsigned)gray >> (8u - mode->bitdepth)) & ((1u << mode->bitdepth) - 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3448 addColorBits(out, i, mode->bitdepth, gray);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3449 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3450 } else if(mode->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3451 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3452 out[i * 3 + 0] = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3453 out[i * 3 + 1] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3454 out[i * 3 + 2] = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3455 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3456 out[i * 6 + 0] = out[i * 6 + 1] = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3457 out[i * 6 + 2] = out[i * 6 + 3] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3458 out[i * 6 + 4] = out[i * 6 + 5] = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3459 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3460 } else if(mode->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3461 int index = color_tree_get(tree, r, g, b, a);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3462 if(index < 0) return 82; /color not in palette/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3463 if(mode->bitdepth == 8) out[i] = index;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3464 else addColorBits(out, i, mode->bitdepth, (unsigned)index);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3465 } else if(mode->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3466 unsigned char gray = r; /((unsigned short)r + g + b) / 3u;/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3467 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3468 out[i * 2 + 0] = gray;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3469 out[i * 2 + 1] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3470 } else if(mode->bitdepth == 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3471 out[i * 4 + 0] = out[i * 4 + 1] = gray;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3472 out[i * 4 + 2] = out[i * 4 + 3] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3473 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3474 } else if(mode->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3475 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3476 out[i * 4 + 0] = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3477 out[i * 4 + 1] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3478 out[i * 4 + 2] = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3479 out[i * 4 + 3] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3480 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3481 out[i * 8 + 0] = out[i * 8 + 1] = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3482 out[i * 8 + 2] = out[i * 8 + 3] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3483 out[i * 8 + 4] = out[i * 8 + 5] = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3484 out[i * 8 + 6] = out[i * 8 + 7] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3485 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3486 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3487
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3488 return 0; /no error/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3489 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3490
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3491 /put a pixel, given its RGBA16 color, into image of any color 16-bitdepth type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3492 static void rgba16ToPixel(unsigned char* out, size_t i,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3493 const LodePNGColorMode* mode,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3494 unsigned short r, unsigned short g, unsigned short b, unsigned short a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3495 if(mode->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3496 unsigned short gray = r; /((unsigned)r + g + b) / 3u;/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3497 out[i * 2 + 0] = (gray >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3498 out[i * 2 + 1] = gray & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3499 } else if(mode->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3500 out[i * 6 + 0] = (r >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3501 out[i * 6 + 1] = r & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3502 out[i * 6 + 2] = (g >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3503 out[i * 6 + 3] = g & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3504 out[i * 6 + 4] = (b >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3505 out[i * 6 + 5] = b & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3506 } else if(mode->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3507 unsigned short gray = r; /((unsigned)r + g + b) / 3u;/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3508 out[i * 4 + 0] = (gray >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3509 out[i * 4 + 1] = gray & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3510 out[i * 4 + 2] = (a >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3511 out[i * 4 + 3] = a & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3512 } else if(mode->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3513 out[i * 8 + 0] = (r >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3514 out[i * 8 + 1] = r & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3515 out[i * 8 + 2] = (g >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3516 out[i * 8 + 3] = g & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3517 out[i * 8 + 4] = (b >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3518 out[i * 8 + 5] = b & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3519 out[i * 8 + 6] = (a >> 8) & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3520 out[i * 8 + 7] = a & 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3521 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3522 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3523
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3524 /Get RGBA8 color of pixel with index i (y width + x) from the raw image with given color type.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3525 static void getPixelColorRGBA8(unsigned char* r, unsigned char* g,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3526 unsigned char* b, unsigned char* a,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3527 const unsigned char* in, size_t i,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3528 const LodePNGColorMode* mode) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3529 if(mode->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3530 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3531 r = g = *b = in[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3532 if(mode->key_defined && r == mode->key_r) a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3533 else *a = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3534 } else if(mode->bitdepth == 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3535 r = g = b = in[i 2 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3536 if(mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r) *a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3537 else *a = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3538 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3539 unsigned highest = ((1U << mode->bitdepth) - 1U); /highest possible value for this bit depth/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3540 size_t j = i * mode->bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3541 unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3542 r = g = b = (value 255) / highest;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3543 if(mode->key_defined && value == mode->key_r) *a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3544 else *a = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3545 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3546 } else if(mode->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3547 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3548 r = in[i 3 + 0]; g = in[i 3 + 1]; b = in[i 3 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3549 if(mode->key_defined && r == mode->key_r && g == mode->key_g && b == mode->key_b) a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3550 else *a = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3551 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3552 r = in[i 6 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3553 g = in[i 6 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3554 b = in[i 6 + 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3555 if(mode->key_defined && 256U * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3556 && 256U * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3557 && 256U * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b) *a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3558 else *a = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3559 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3560 } else if(mode->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3561 unsigned index;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3562 if(mode->bitdepth == 8) index = in[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3563 else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3564 size_t j = i * mode->bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3565 index = readBitsFromReversedStream(&j, in, mode->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3566 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3567 /out of bounds of palette not checked: see lodepng_color_mode_alloc_palette./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3568 r = mode->palette[index 4 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3569 g = mode->palette[index 4 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3570 b = mode->palette[index 4 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3571 a = mode->palette[index 4 + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3572 } else if(mode->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3573 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3574 r = g = b = in[i 2 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3575 a = in[i 2 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3576 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3577 r = g = b = in[i 4 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3578 a = in[i 4 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3579 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3580 } else if(mode->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3581 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3582 r = in[i 4 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3583 g = in[i 4 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3584 b = in[i 4 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3585 a = in[i 4 + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3586 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3587 r = in[i 8 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3588 g = in[i 8 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3589 b = in[i 8 + 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3590 a = in[i 8 + 6];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3591 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3592 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3593 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3594
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3595 /*Similar to getPixelColorRGBA8, but with all the for loops inside of the color
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3596 mode test cases, optimized to convert the colors much faster, when converting
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3597 to the common case of RGBA with 8 bit per channel. buffer must be RGBA with
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3598 enough memory.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3599 static void getPixelColorsRGBA8(unsigned char* LODEPNG_RESTRICT buffer, size_t numpixels,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3600 const unsigned char* LODEPNG_RESTRICT in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3601 const LodePNGColorMode* mode) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3602 unsigned num_channels = 4;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3603 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3604 if(mode->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3605 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3606 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3607 buffer[0] = buffer[1] = buffer[2] = in[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3608 buffer[3] = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3609 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3610 if(mode->key_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3611 buffer -= numpixels * num_channels;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3612 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3613 if(buffer[0] == mode->key_r) buffer[3] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3614 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3615 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3616 } else if(mode->bitdepth == 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3617 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3618 buffer[0] = buffer[1] = buffer[2] = in[i * 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3619 buffer[3] = mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r ? 0 : 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3620 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3621 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3622 unsigned highest = ((1U << mode->bitdepth) - 1U); /highest possible value for this bit depth/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3623 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3624 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3625 unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3626 buffer[0] = buffer[1] = buffer[2] = (value * 255) / highest;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3627 buffer[3] = mode->key_defined && value == mode->key_r ? 0 : 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3628 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3629 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3630 } else if(mode->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3631 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3632 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3633 lodepng_memcpy(buffer, &in[i * 3], 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3634 buffer[3] = 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3635 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3636 if(mode->key_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3637 buffer -= numpixels * num_channels;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3638 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3639 if(buffer[0] == mode->key_r && buffer[1]== mode->key_g && buffer[2] == mode->key_b) buffer[3] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3640 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3641 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3642 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3643 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3644 buffer[0] = in[i * 6 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3645 buffer[1] = in[i * 6 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3646 buffer[2] = in[i * 6 + 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3647 buffer[3] = mode->key_defined
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3648 && 256U * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3649 && 256U * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3650 && 256U * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b ? 0 : 255;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3651 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3652 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3653 } else if(mode->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3654 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3655 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3656 unsigned index = in[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3657 /out of bounds of palette not checked: see lodepng_color_mode_alloc_palette./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3658 lodepng_memcpy(buffer, &mode->palette[index * 4], 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3659 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3660 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3661 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3662 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3663 unsigned index = readBitsFromReversedStream(&j, in, mode->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3664 /out of bounds of palette not checked: see lodepng_color_mode_alloc_palette./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3665 lodepng_memcpy(buffer, &mode->palette[index * 4], 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3666 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3667 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3668 } else if(mode->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3669 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3670 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3671 buffer[0] = buffer[1] = buffer[2] = in[i * 2 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3672 buffer[3] = in[i * 2 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3673 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3674 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3675 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3676 buffer[0] = buffer[1] = buffer[2] = in[i * 4 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3677 buffer[3] = in[i * 4 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3678 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3679 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3680 } else if(mode->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3681 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3682 lodepng_memcpy(buffer, in, numpixels * 4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3683 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3684 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3685 buffer[0] = in[i * 8 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3686 buffer[1] = in[i * 8 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3687 buffer[2] = in[i * 8 + 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3688 buffer[3] = in[i * 8 + 6];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3689 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3690 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3691 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3692 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3693
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3694 /Similar to getPixelColorsRGBA8, but with 3-channel RGB output./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3695 static void getPixelColorsRGB8(unsigned char* LODEPNG_RESTRICT buffer, size_t numpixels,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3696 const unsigned char* LODEPNG_RESTRICT in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3697 const LodePNGColorMode* mode) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3698 const unsigned num_channels = 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3699 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3700 if(mode->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3701 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3702 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3703 buffer[0] = buffer[1] = buffer[2] = in[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3704 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3705 } else if(mode->bitdepth == 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3706 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3707 buffer[0] = buffer[1] = buffer[2] = in[i * 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3708 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3709 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3710 unsigned highest = ((1U << mode->bitdepth) - 1U); /highest possible value for this bit depth/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3711 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3712 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3713 unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3714 buffer[0] = buffer[1] = buffer[2] = (value * 255) / highest;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3715 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3716 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3717 } else if(mode->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3718 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3719 lodepng_memcpy(buffer, in, numpixels * 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3720 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3721 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3722 buffer[0] = in[i * 6 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3723 buffer[1] = in[i * 6 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3724 buffer[2] = in[i * 6 + 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3725 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3726 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3727 } else if(mode->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3728 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3729 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3730 unsigned index = in[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3731 /out of bounds of palette not checked: see lodepng_color_mode_alloc_palette./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3732 lodepng_memcpy(buffer, &mode->palette[index * 4], 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3733 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3734 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3735 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3736 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3737 unsigned index = readBitsFromReversedStream(&j, in, mode->bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3738 /out of bounds of palette not checked: see lodepng_color_mode_alloc_palette./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3739 lodepng_memcpy(buffer, &mode->palette[index * 4], 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3740 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3741 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3742 } else if(mode->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3743 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3744 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3745 buffer[0] = buffer[1] = buffer[2] = in[i * 2 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3746 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3747 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3748 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3749 buffer[0] = buffer[1] = buffer[2] = in[i * 4 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3750 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3751 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3752 } else if(mode->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3753 if(mode->bitdepth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3754 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3755 lodepng_memcpy(buffer, &in[i * 4], 3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3756 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3757 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3758 for(i = 0; i != numpixels; ++i, buffer += num_channels) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3759 buffer[0] = in[i * 8 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3760 buffer[1] = in[i * 8 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3761 buffer[2] = in[i * 8 + 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3762 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3763 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3764 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3765 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3766
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3767 /Get RGBA16 color of pixel with index i (y width + x) from the raw image with
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3768 given color type, but the given color type must be 16-bit itself.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3769 static void getPixelColorRGBA16(unsigned short* r, unsigned short* g, unsigned short* b, unsigned short* a,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3770 const unsigned char* in, size_t i, const LodePNGColorMode* mode) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3771 if(mode->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3772 r = g = b = 256 in[i * 2 + 0] + in[i * 2 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3773 if(mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r) *a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3774 else *a = 65535;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3775 } else if(mode->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3776 r = 256u in[i * 6 + 0] + in[i * 6 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3777 g = 256u in[i * 6 + 2] + in[i * 6 + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3778 b = 256u in[i * 6 + 4] + in[i * 6 + 5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3779 if(mode->key_defined
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3780 && 256u * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3781 && 256u * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3782 && 256u * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b) *a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3783 else *a = 65535;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3784 } else if(mode->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3785 r = g = b = 256u in[i * 4 + 0] + in[i * 4 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3786 a = 256u in[i * 4 + 2] + in[i * 4 + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3787 } else if(mode->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3788 r = 256u in[i * 8 + 0] + in[i * 8 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3789 g = 256u in[i * 8 + 2] + in[i * 8 + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3790 b = 256u in[i * 8 + 4] + in[i * 8 + 5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3791 a = 256u in[i * 8 + 6] + in[i * 8 + 7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3792 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3793 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3794
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3795 unsigned lodepng_convert(unsigned char* out, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3796 const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3797 unsigned w, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3798 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3799 ColorTree tree;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3800 size_t numpixels = (size_t)w * (size_t)h;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3801 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3802
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3803 if(mode_in->colortype == LCT_PALETTE && !mode_in->palette) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3804 return 107; /* error: must provide palette if input mode is palette */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3805 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3806
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3807 if(lodepng_color_mode_equal(mode_out, mode_in)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3808 size_t numbytes = lodepng_get_raw_size(w, h, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3809 lodepng_memcpy(out, in, numbytes);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3810 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3811 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3812
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3813 if(mode_out->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3814 size_t palettesize = mode_out->palettesize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3815 const unsigned char* palette = mode_out->palette;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3816 size_t palsize = (size_t)1u << mode_out->bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3817 /*if the user specified output palette but did not give the values, assume
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3818 they want the values of the input color type (assuming that one is palette).
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3819 Note that we never create a new palette ourselves.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3820 if(palettesize == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3821 palettesize = mode_in->palettesize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3822 palette = mode_in->palette;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3823 /*if the input was also palette with same bitdepth, then the color types are also
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3824 equal, so copy literally. This to preserve the exact indices that were in the PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3825 even in case there are duplicate colors in the palette.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3826 if(mode_in->colortype == LCT_PALETTE && mode_in->bitdepth == mode_out->bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3827 size_t numbytes = lodepng_get_raw_size(w, h, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3828 lodepng_memcpy(out, in, numbytes);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3829 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3830 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3831 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3832 if(palettesize < palsize) palsize = palettesize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3833 color_tree_init(&tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3834 for(i = 0; i != palsize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3835 const unsigned char* p = &palette[i * 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3836 error = color_tree_add(&tree, p[0], p[1], p[2], p[3], (unsigned)i);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3837 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3838 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3839 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3841 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3842 if(mode_in->bitdepth == 16 && mode_out->bitdepth == 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3843 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3844 unsigned short r = 0, g = 0, b = 0, a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3845 getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3846 rgba16ToPixel(out, i, mode_out, r, g, b, a);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3847 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3848 } else if(mode_out->bitdepth == 8 && mode_out->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3849 getPixelColorsRGBA8(out, numpixels, in, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3850 } else if(mode_out->bitdepth == 8 && mode_out->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3851 getPixelColorsRGB8(out, numpixels, in, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3852 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3853 unsigned char r = 0, g = 0, b = 0, a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3854 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3855 getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3856 error = rgba8ToPixel(out, i, mode_out, &tree, r, g, b, a);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3857 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3858 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3859 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3860 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3861
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3862 if(mode_out->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3863 color_tree_cleanup(&tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3864 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3865
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3866 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3867 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3868
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3869
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3870 /* Converts a single rgb color without alpha from one type to another, color bits truncated to
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3871 their bitdepth. In case of single channel (gray or palette), only the r channel is used. Slow
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3872 function, do not use to process all pixels of an image. Alpha channel not supported on purpose:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3873 this is for bKGD, supporting alpha may prevent it from finding a color in the palette, from the
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3874 specification it looks like bKGD should ignore the alpha values of the palette since it can use
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3875 any palette index but doesn't have an alpha channel. Idem with ignoring color key. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3876 unsigned lodepng_convert_rgb(
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3877 unsigned* r_out, unsigned* g_out, unsigned* b_out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3878 unsigned r_in, unsigned g_in, unsigned b_in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3879 const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3880 unsigned r = 0, g = 0, b = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3881 unsigned mul = 65535 / ((1u << mode_in->bitdepth) - 1u); /65535, 21845, 4369, 257, 1/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3882 unsigned shift = 16 - mode_out->bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3883
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3884 if(mode_in->colortype == LCT_GREY \|\| mode_in->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3885 r = g = b = r_in * mul;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3886 } else if(mode_in->colortype == LCT_RGB \|\| mode_in->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3887 r = r_in * mul;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3888 g = g_in * mul;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3889 b = b_in * mul;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3890 } else if(mode_in->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3891 if(r_in >= mode_in->palettesize) return 82;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3892 r = mode_in->palette[r_in * 4 + 0] * 257u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3893 g = mode_in->palette[r_in * 4 + 1] * 257u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3894 b = mode_in->palette[r_in * 4 + 2] * 257u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3895 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3896 return 31;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3897 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3898
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3899 /* now convert to output format */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3900 if(mode_out->colortype == LCT_GREY \|\| mode_out->colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3901 *r_out = r >> shift ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3902 } else if(mode_out->colortype == LCT_RGB \|\| mode_out->colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3903 *r_out = r >> shift ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3904 *g_out = g >> shift ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3905 *b_out = b >> shift ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3906 } else if(mode_out->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3907 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3908 /* a 16-bit color cannot be in the palette */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3909 if((r >> 8) != (r & 255) \|\| (g >> 8) != (g & 255) \|\| (b >> 8) != (b & 255)) return 82;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3910 for(i = 0; i < mode_out->palettesize; i++) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3911 unsigned j = i * 4;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3912 if((r >> 8) == mode_out->palette[j + 0] && (g >> 8) == mode_out->palette[j + 1] &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3913 (b >> 8) == mode_out->palette[j + 2]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3914 *r_out = i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3915 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3916 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3917 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3918 return 82;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3919 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3920 return 31;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3921 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3922
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3923 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3924 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3925
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3926 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3927
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3928 void lodepng_color_stats_init(LodePNGColorStats* stats) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3929 /stats/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3930 stats->colored = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3931 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3932 stats->key_r = stats->key_g = stats->key_b = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3933 stats->alpha = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3934 stats->numcolors = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3935 stats->bits = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3936 stats->numpixels = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3937 /settings/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3938 stats->allow_palette = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3939 stats->allow_greyscale = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3940 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3941
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3942 /function used for debug purposes with C++/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3943 /void printColorStats(LodePNGColorStats p) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3944 std::cout << "colored: " << (int)p->colored << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3945 std::cout << "key: " << (int)p->key << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3946 std::cout << "key_r: " << (int)p->key_r << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3947 std::cout << "key_g: " << (int)p->key_g << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3948 std::cout << "key_b: " << (int)p->key_b << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3949 std::cout << "alpha: " << (int)p->alpha << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3950 std::cout << "numcolors: " << (int)p->numcolors << ", ";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3951 std::cout << "bits: " << (int)p->bits << std::endl;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3952 }*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3953
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3954 /Returns how many bits needed to represent given value (max 8 bit)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3955 static unsigned getValueRequiredBits(unsigned char value) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3956 if(value == 0 \|\| value == 255) return 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3957 /The scaling of 2-bit and 4-bit values uses multiples of 85 and 17/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3958 if(value % 17 == 0) return value % 85 == 0 ? 2 : 4;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3959 return 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3960 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3961
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3962 /stats must already have been inited. /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3963 unsigned lodepng_compute_color_stats(LodePNGColorStats* stats,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3964 const unsigned char* in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3965 const LodePNGColorMode* mode_in) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3966 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3967 ColorTree tree;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3968 size_t numpixels = (size_t)w * (size_t)h;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3969 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3970
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3971 /* mark things as done already if it would be impossible to have a more expensive case */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3972 unsigned colored_done = lodepng_is_greyscale_type(mode_in) ? 1 : 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3973 unsigned alpha_done = lodepng_can_have_alpha(mode_in) ? 0 : 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3974 unsigned numcolors_done = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3975 unsigned bpp = lodepng_get_bpp(mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3976 unsigned bits_done = (stats->bits == 1 && bpp == 1) ? 1 : 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3977 unsigned sixteen = 0; /* whether the input image is 16 bit */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3978 unsigned maxnumcolors = 257;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3979 if(bpp <= 8) maxnumcolors = LODEPNG_MIN(257, stats->numcolors + (1u << bpp));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3980
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3981 stats->numpixels += numpixels;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3982
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3983 /if palette not allowed, no need to compute numcolors/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3984 if(!stats->allow_palette) numcolors_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3985
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3986 color_tree_init(&tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3987
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3988 /*If the stats was already filled in from previous data, fill its palette in tree
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3989 and mark things as done already if we know they are the most expensive case already*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3990 if(stats->alpha) alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3991 if(stats->colored) colored_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3992 if(stats->bits == 16) numcolors_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3993 if(stats->bits >= bpp) bits_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3994 if(stats->numcolors >= maxnumcolors) numcolors_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3995
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3996 if(!numcolors_done) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3997 for(i = 0; i < stats->numcolors; i++) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3998 const unsigned char* color = &stats->palette[i * 4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	3999 error = color_tree_add(&tree, color[0], color[1], color[2], color[3], i);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4000 if(error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4001 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4002 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4003
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4004 /Check if the 16-bit input is truly 16-bit/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4005 if(mode_in->bitdepth == 16 && !sixteen) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4006 unsigned short r = 0, g = 0, b = 0, a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4007 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4008 getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4009 if((r & 255) != ((r >> 8) & 255) \|\| (g & 255) != ((g >> 8) & 255) \|\|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4010 (b & 255) != ((b >> 8) & 255) \|\| (a & 255) != ((a >> 8) & 255)) /first and second byte differ/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4011 stats->bits = 16;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4012 sixteen = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4013 bits_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4014 numcolors_done = 1; /counting colors no longer useful, palette doesn't support 16-bit/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4015 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4016 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4017 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4018 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4019
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4020 if(sixteen) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4021 unsigned short r = 0, g = 0, b = 0, a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4022
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4023 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4024 getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4025
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4026 if(!colored_done && (r != g \|\| r != b)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4027 stats->colored = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4028 colored_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4029 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4030
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4031 if(!alpha_done) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4032 unsigned matchkey = (r == stats->key_r && g == stats->key_g && b == stats->key_b);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4033 if(a != 65535 && (a != 0 \|\| (stats->key && !matchkey))) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4034 stats->alpha = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4035 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4036 alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4037 } else if(a == 0 && !stats->alpha && !stats->key) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4038 stats->key = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4039 stats->key_r = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4040 stats->key_g = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4041 stats->key_b = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4042 } else if(a == 65535 && stats->key && matchkey) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4043 /* Color key cannot be used if an opaque pixel also has that RGB color. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4044 stats->alpha = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4045 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4046 alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4047 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4048 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4049 if(alpha_done && numcolors_done && colored_done && bits_done) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4050 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4051
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4052 if(stats->key && !stats->alpha) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4053 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4054 getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4055 if(a != 0 && r == stats->key_r && g == stats->key_g && b == stats->key_b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4056 /* Color key cannot be used if an opaque pixel also has that RGB color. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4057 stats->alpha = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4058 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4059 alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4060 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4061 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4062 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4063 } else /* < 16-bit */ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4064 unsigned char r = 0, g = 0, b = 0, a = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4065 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4066 getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4067
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4068 if(!bits_done && stats->bits < 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4069 /only r is checked, < 8 bits is only relevant for grayscale/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4070 unsigned bits = getValueRequiredBits(r);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4071 if(bits > stats->bits) stats->bits = bits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4072 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4073 bits_done = (stats->bits >= bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4074
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4075 if(!colored_done && (r != g \|\| r != b)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4076 stats->colored = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4077 colored_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4078 if(stats->bits < 8) stats->bits = 8; /PNG has no colored modes with less than 8-bit per channel/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4079 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4080
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4081 if(!alpha_done) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4082 unsigned matchkey = (r == stats->key_r && g == stats->key_g && b == stats->key_b);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4083 if(a != 255 && (a != 0 \|\| (stats->key && !matchkey))) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4084 stats->alpha = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4085 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4086 alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4087 if(stats->bits < 8) stats->bits = 8; /PNG has no alphachannel modes with less than 8-bit per channel/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4088 } else if(a == 0 && !stats->alpha && !stats->key) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4089 stats->key = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4090 stats->key_r = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4091 stats->key_g = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4092 stats->key_b = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4093 } else if(a == 255 && stats->key && matchkey) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4094 /* Color key cannot be used if an opaque pixel also has that RGB color. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4095 stats->alpha = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4096 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4097 alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4098 if(stats->bits < 8) stats->bits = 8; /PNG has no alphachannel modes with less than 8-bit per channel/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4099 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4100 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4101
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4102 if(!numcolors_done) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4103 if(!color_tree_has(&tree, r, g, b, a)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4104 error = color_tree_add(&tree, r, g, b, a, stats->numcolors);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4105 if(error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4106 if(stats->numcolors < 256) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4107 unsigned char* p = stats->palette;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4108 unsigned n = stats->numcolors;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4109 p[n * 4 + 0] = r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4110 p[n * 4 + 1] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4111 p[n * 4 + 2] = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4112 p[n * 4 + 3] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4113 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4114 ++stats->numcolors;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4115 numcolors_done = stats->numcolors >= maxnumcolors;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4116 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4117 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4118
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4119 if(alpha_done && numcolors_done && colored_done && bits_done) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4120 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4121
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4122 if(stats->key && !stats->alpha) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4123 for(i = 0; i != numpixels; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4124 getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4125 if(a != 0 && r == stats->key_r && g == stats->key_g && b == stats->key_b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4126 /* Color key cannot be used if an opaque pixel also has that RGB color. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4127 stats->alpha = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4128 stats->key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4129 alpha_done = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4130 if(stats->bits < 8) stats->bits = 8; /PNG has no alphachannel modes with less than 8-bit per channel/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4131 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4132 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4133 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4134
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4135 /make the stats's key always 16-bit for consistency - repeat each byte twice/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4136 stats->key_r += (stats->key_r << 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4137 stats->key_g += (stats->key_g << 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4138 stats->key_b += (stats->key_b << 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4139 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4140
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4141 cleanup:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4142 color_tree_cleanup(&tree);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4143 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4144 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4145
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4146 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4147 /*Adds a single color to the color stats. The stats must already have been inited. The color must be given as 16-bit
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4148 (with 2 bytes repeating for 8-bit and 65535 for opaque alpha channel). This function is expensive, do not call it for
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4149 all pixels of an image but only for a few additional values. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4150 static unsigned lodepng_color_stats_add(LodePNGColorStats* stats,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4151 unsigned r, unsigned g, unsigned b, unsigned a) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4152 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4153 unsigned char image[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4154 LodePNGColorMode mode;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4155 lodepng_color_mode_init(&mode);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4156 image[0] = r >> 8; image[1] = r; image[2] = g >> 8; image[3] = g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4157 image[4] = b >> 8; image[5] = b; image[6] = a >> 8; image[7] = a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4158 mode.bitdepth = 16;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4159 mode.colortype = LCT_RGBA;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4160 error = lodepng_compute_color_stats(stats, image, 1, 1, &mode);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4161 lodepng_color_mode_cleanup(&mode);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4162 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4163 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4164 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4165
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4166 /*Computes a minimal PNG color model that can contain all colors as indicated by the stats.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4167 The stats should be computed with lodepng_compute_color_stats.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4168 mode_in is raw color profile of the image the stats were computed on, to copy palette order from when relevant.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4169 Minimal PNG color model means the color type and bit depth that gives smallest amount of bits in the output image,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4170 e.g. gray if only grayscale pixels, palette if less than 256 colors, color key if only single transparent color, ...
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4171 This is used if auto_convert is enabled (it is by default).
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4172 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4173 static unsigned auto_choose_color(LodePNGColorMode* mode_out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4174 const LodePNGColorMode* mode_in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4175 const LodePNGColorStats* stats) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4176 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4177 unsigned palettebits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4178 size_t i, n;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4179 size_t numpixels = stats->numpixels;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4180 unsigned palette_ok, gray_ok;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4181
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4182 unsigned alpha = stats->alpha;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4183 unsigned key = stats->key;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4184 unsigned bits = stats->bits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4185
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4186 mode_out->key_defined = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4187
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4188 if(key && numpixels <= 16) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4189 alpha = 1; /too few pixels to justify tRNS chunk overhead/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4190 key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4191 if(bits < 8) bits = 8; /PNG has no alphachannel modes with less than 8-bit per channel/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4192 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4193
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4194 gray_ok = !stats->colored;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4195 if(!stats->allow_greyscale) gray_ok = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4196 if(!gray_ok && bits < 8) bits = 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4197
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4198 n = stats->numcolors;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4199 palettebits = n <= 2 ? 1 : (n <= 4 ? 2 : (n <= 16 ? 4 : 8));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4200 palette_ok = n <= 256 && bits <= 8 && n != 0; /n==0 means likely numcolors wasn't computed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4201 if(numpixels < n * 2) palette_ok = 0; /don't add palette overhead if image has only a few pixels/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4202 if(gray_ok && !alpha && bits <= palettebits) palette_ok = 0; /gray is less overhead/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4203 if(!stats->allow_palette) palette_ok = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4204
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4205 if(palette_ok) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4206 const unsigned char* p = stats->palette;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4207 lodepng_palette_clear(mode_out); /remove potential earlier palette/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4208 for(i = 0; i != stats->numcolors; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4209 error = lodepng_palette_add(mode_out, p[i * 4 + 0], p[i * 4 + 1], p[i * 4 + 2], p[i * 4 + 3]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4210 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4211 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4212
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4213 mode_out->colortype = LCT_PALETTE;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4214 mode_out->bitdepth = palettebits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4215
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4216 if(mode_in->colortype == LCT_PALETTE && mode_in->palettesize >= mode_out->palettesize
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4217 && mode_in->bitdepth == mode_out->bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4218 /If input should have same palette colors, keep original to preserve its order and prevent conversion/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4219 lodepng_color_mode_cleanup(mode_out); /clears palette, keeps the above set colortype and bitdepth fields as-is/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4220 lodepng_color_mode_copy(mode_out, mode_in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4221 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4222 } else /8-bit or 16-bit per channel/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4223 mode_out->bitdepth = bits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4224 mode_out->colortype = alpha ? (gray_ok ? LCT_GREY_ALPHA : LCT_RGBA)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4225 : (gray_ok ? LCT_GREY : LCT_RGB);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4226 if(key) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4227 unsigned mask = (1u << mode_out->bitdepth) - 1u; /stats always uses 16-bit, mask converts it/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4228 mode_out->key_r = stats->key_r & mask;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4229 mode_out->key_g = stats->key_g & mask;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4230 mode_out->key_b = stats->key_b & mask;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4231 mode_out->key_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4232 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4233 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4234
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4235 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4236 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4237
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4238 #endif /* #ifdef LODEPNG_COMPILE_ENCODER */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4239
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4240 /Paeth predictor, used by PNG filter type 4/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4241 static unsigned char paethPredictor(unsigned char a, unsigned char b, unsigned char c) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4242 /* the subtractions of unsigned char cast it to a signed type.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4243 With gcc, short is faster than int, with clang int is as fast (as of april 2023)*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4244 short pa = (b - c) < 0 ? -(b - c) : (b - c);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4245 short pb = (a - c) < 0 ? -(a - c) : (a - c);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4246 /* writing it out like this compiles to something faster than introducing a temp variable*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4247 short pc = (a + b - c - c) < 0 ? -(a + b - c - c) : (a + b - c - c);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4248 /* return input value associated with smallest of pa, pb, pc (with certain priority if equal) */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4249 if(pb < pa) { a = b; pa = pb; }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4250 return (pc < pa) ? c : a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4251 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4252
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4253 /shared values used by multiple Adam7 related functions/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4254
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4255 static const unsigned ADAM7_IX[7] = { 0, 4, 0, 2, 0, 1, 0 }; /x start values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4256 static const unsigned ADAM7_IY[7] = { 0, 0, 4, 0, 2, 0, 1 }; /y start values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4257 static const unsigned ADAM7_DX[7] = { 8, 8, 4, 4, 2, 2, 1 }; /x delta values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4258 static const unsigned ADAM7_DY[7] = { 8, 8, 8, 4, 4, 2, 2 }; /y delta values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4259
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4260 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4261 Outputs various dimensions and positions in the image related to the Adam7 reduced images.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4262 passw: output containing the width of the 7 passes
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4263 passh: output containing the height of the 7 passes
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4264 filter_passstart: output containing the index of the start and end of each
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4265 reduced image with filter bytes
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4266 padded_passstart output containing the index of the start and end of each
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4267 reduced image when without filter bytes but with padded scanlines
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4268 passstart: output containing the index of the start and end of each reduced
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4269 image without padding between scanlines, but still padding between the images
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4270 w, h: width and height of non-interlaced image
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4271 bpp: bits per pixel
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4272 "padded" is only relevant if bpp is less than 8 and a scanline or image does not
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4273 end at a full byte
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4274 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4275 static void Adam7_getpassvalues(unsigned passw[7], unsigned passh[7], size_t filter_passstart[8],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4276 size_t padded_passstart[8], size_t passstart[8], unsigned w, unsigned h, unsigned bpp) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4277 /the passstart values have 8 values: the 8th one indicates the byte after the end of the 7th (= last) pass/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4278 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4279
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4280 /calculate width and height in pixels of each pass/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4281 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4282 passw[i] = (w + ADAM7_DX[i] - ADAM7_IX[i] - 1) / ADAM7_DX[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4283 passh[i] = (h + ADAM7_DY[i] - ADAM7_IY[i] - 1) / ADAM7_DY[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4284 if(passw[i] == 0) passh[i] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4285 if(passh[i] == 0) passw[i] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4286 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4287
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4288 filter_passstart[0] = padded_passstart[0] = passstart[0] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4289 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4290 /if passw[i] is 0, it's 0 bytes, not 1 (no filtertype-byte)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4291 filter_passstart[i + 1] = filter_passstart[i]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4292 + ((passw[i] && passh[i]) ? passh[i] * (1u + (passw[i] * bpp + 7u) / 8u) : 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4293 /bits padded if needed to fill full byte at end of each scanline/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4294 padded_passstart[i + 1] = padded_passstart[i] + passh[i] * ((passw[i] * bpp + 7u) / 8u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4295 /only padded at end of reduced image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4296 passstart[i + 1] = passstart[i] + (passh[i] * passw[i] * bpp + 7u) / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4297 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4298 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4299
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4300 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4301
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4302 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4303 /* / PNG Decoder / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4304 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4305
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4306 /read the information from the header and store it in the LodePNGInfo. return value is error/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4307 unsigned lodepng_inspect(unsigned* w, unsigned* h, LodePNGState* state,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4308 const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4309 unsigned width, height;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4310 LodePNGInfo* info = &state->info_png;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4311 if(insize == 0 \|\| in == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4312 CERROR_RETURN_ERROR(state->error, 48); /error: the given data is empty/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4313 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4314 if(insize < 33) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4315 CERROR_RETURN_ERROR(state->error, 27); /error: the data length is smaller than the length of a PNG header/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4316 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4317
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4318 /when decoding a new PNG image, make sure all parameters created after previous decoding are reset/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4319 /* TODO: remove this. One should use a new LodePNGState for new sessions */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4320 lodepng_info_cleanup(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4321 lodepng_info_init(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4322
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4323 if(in[0] != 137 \|\| in[1] != 80 \|\| in[2] != 78 \|\| in[3] != 71
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4324 \|\| in[4] != 13 \|\| in[5] != 10 \|\| in[6] != 26 \|\| in[7] != 10) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4325 CERROR_RETURN_ERROR(state->error, 28); /error: the first 8 bytes are not the correct PNG signature/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4326 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4327 if(lodepng_chunk_length(in + 8) != 13) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4328 CERROR_RETURN_ERROR(state->error, 94); /error: header size must be 13 bytes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4329 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4330 if(!lodepng_chunk_type_equals(in + 8, "IHDR")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4331 CERROR_RETURN_ERROR(state->error, 29); /error: it doesn't start with a IHDR chunk!/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4332 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4333
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4334 /read the values given in the header/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4335 width = lodepng_read32bitInt(&in[16]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4336 height = lodepng_read32bitInt(&in[20]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4337 /TODO: remove the undocumented feature that allows to give null pointers to width or height/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4338 if(w) *w = width;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4339 if(h) *h = height;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4340 info->color.bitdepth = in[24];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4341 info->color.colortype = (LodePNGColorType)in[25];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4342 info->compression_method = in[26];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4343 info->filter_method = in[27];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4344 info->interlace_method = in[28];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4345
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4346 /errors returned only after the parsing so other values are still output/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4347
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4348 /error: invalid image size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4349 if(width == 0 \|\| height == 0) CERROR_RETURN_ERROR(state->error, 93);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4350 /error: invalid colortype or bitdepth combination/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4351 state->error = checkColorValidity(info->color.colortype, info->color.bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4352 if(state->error) return state->error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4353 /error: only compression method 0 is allowed in the specification/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4354 if(info->compression_method != 0) CERROR_RETURN_ERROR(state->error, 32);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4355 /error: only filter method 0 is allowed in the specification/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4356 if(info->filter_method != 0) CERROR_RETURN_ERROR(state->error, 33);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4357 /error: only interlace methods 0 and 1 exist in the specification/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4358 if(info->interlace_method > 1) CERROR_RETURN_ERROR(state->error, 34);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4359
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4360 if(!state->decoder.ignore_crc) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4361 unsigned CRC = lodepng_read32bitInt(&in[29]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4362 unsigned checksum = lodepng_crc32(&in[12], 17);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4363 if(CRC != checksum) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4364 CERROR_RETURN_ERROR(state->error, 57); /invalid CRC/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4365 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4366 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4367
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4368 return state->error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4369 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4370
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4371 static unsigned unfilterScanline(unsigned char* recon, const unsigned char* scanline, const unsigned char* precon,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4372 size_t bytewidth, unsigned char filterType, size_t length) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4373 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4374 For PNG filter method 0
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4375 unfilter a PNG image scanline by scanline. when the pixels are smaller than 1 byte,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4376 the filter works byte per byte (bytewidth = 1)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4377 precon is the previous unfiltered scanline, recon the result, scanline the current one
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4378 the incoming scanlines do NOT include the filtertype byte, that one is given in the parameter filterType instead
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4379 recon and scanline MAY be the same memory address! precon must be disjoint.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4380 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4381
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4382 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4383 switch(filterType) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4384 case 0:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4385 for(i = 0; i != length; ++i) recon[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4386 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4387 case 1: {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4388 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4389 for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4390 for(i = bytewidth; i != length; ++i, ++j) recon[i] = scanline[i] + recon[j];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4391 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4392 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4393 case 2:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4394 if(precon) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4395 for(i = 0; i != length; ++i) recon[i] = scanline[i] + precon[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4396 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4397 for(i = 0; i != length; ++i) recon[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4398 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4399 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4400 case 3:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4401 if(precon) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4402 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4403 for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i] + (precon[i] >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4404 /* Unroll independent paths of this predictor. A 6x and 8x version is also possible but that adds
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4405 too much code. Whether this speeds up anything depends on compiler and settings. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4406 if(bytewidth >= 4) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4407 for(; i + 3 < length; i += 4, j += 4) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4408 unsigned char s0 = scanline[i + 0], s1 = scanline[i + 1], s2 = scanline[i + 2], s3 = scanline[i + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4409 unsigned char r0 = recon[j + 0], r1 = recon[j + 1], r2 = recon[j + 2], r3 = recon[j + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4410 unsigned char p0 = precon[i + 0], p1 = precon[i + 1], p2 = precon[i + 2], p3 = precon[i + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4411 recon[i + 0] = s0 + ((r0 + p0) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4412 recon[i + 1] = s1 + ((r1 + p1) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4413 recon[i + 2] = s2 + ((r2 + p2) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4414 recon[i + 3] = s3 + ((r3 + p3) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4415 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4416 } else if(bytewidth >= 3) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4417 for(; i + 2 < length; i += 3, j += 3) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4418 unsigned char s0 = scanline[i + 0], s1 = scanline[i + 1], s2 = scanline[i + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4419 unsigned char r0 = recon[j + 0], r1 = recon[j + 1], r2 = recon[j + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4420 unsigned char p0 = precon[i + 0], p1 = precon[i + 1], p2 = precon[i + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4421 recon[i + 0] = s0 + ((r0 + p0) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4422 recon[i + 1] = s1 + ((r1 + p1) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4423 recon[i + 2] = s2 + ((r2 + p2) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4424 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4425 } else if(bytewidth >= 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4426 for(; i + 1 < length; i += 2, j += 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4427 unsigned char s0 = scanline[i + 0], s1 = scanline[i + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4428 unsigned char r0 = recon[j + 0], r1 = recon[j + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4429 unsigned char p0 = precon[i + 0], p1 = precon[i + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4430 recon[i + 0] = s0 + ((r0 + p0) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4431 recon[i + 1] = s1 + ((r1 + p1) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4432 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4433 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4434 for(; i != length; ++i, ++j) recon[i] = scanline[i] + ((recon[j] + precon[i]) >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4435 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4436 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4437 for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4438 for(i = bytewidth; i != length; ++i, ++j) recon[i] = scanline[i] + (recon[j] >> 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4439 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4440 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4441 case 4:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4442 if(precon) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4443 /* Unroll independent paths of this predictor. Whether this speeds up
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4444 anything depends on compiler and settings. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4445 if(bytewidth == 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4446 unsigned char a0, b0 = 0, c0, d0 = 0, a1, b1 = 0, c1, d1 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4447 unsigned char a2, b2 = 0, c2, d2 = 0, a3, b3 = 0, c3, d3 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4448 unsigned char a4, b4 = 0, c4, d4 = 0, a5, b5 = 0, c5, d5 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4449 unsigned char a6, b6 = 0, c6, d6 = 0, a7, b7 = 0, c7, d7 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4450 for(i = 0; i + 7 < length; i += 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4451 c0 = b0; c1 = b1; c2 = b2; c3 = b3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4452 c4 = b4; c5 = b5; c6 = b6; c7 = b7;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4453 b0 = precon[i + 0]; b1 = precon[i + 1]; b2 = precon[i + 2]; b3 = precon[i + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4454 b4 = precon[i + 4]; b5 = precon[i + 5]; b6 = precon[i + 6]; b7 = precon[i + 7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4455 a0 = d0; a1 = d1; a2 = d2; a3 = d3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4456 a4 = d4; a5 = d5; a6 = d6; a7 = d7;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4457 d0 = scanline[i + 0] + paethPredictor(a0, b0, c0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4458 d1 = scanline[i + 1] + paethPredictor(a1, b1, c1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4459 d2 = scanline[i + 2] + paethPredictor(a2, b2, c2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4460 d3 = scanline[i + 3] + paethPredictor(a3, b3, c3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4461 d4 = scanline[i + 4] + paethPredictor(a4, b4, c4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4462 d5 = scanline[i + 5] + paethPredictor(a5, b5, c5);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4463 d6 = scanline[i + 6] + paethPredictor(a6, b6, c6);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4464 d7 = scanline[i + 7] + paethPredictor(a7, b7, c7);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4465 recon[i + 0] = d0; recon[i + 1] = d1; recon[i + 2] = d2; recon[i + 3] = d3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4466 recon[i + 4] = d4; recon[i + 5] = d5; recon[i + 6] = d6; recon[i + 7] = d7;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4467 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4468 } else if(bytewidth == 6) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4469 unsigned char a0, b0 = 0, c0, d0 = 0, a1, b1 = 0, c1, d1 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4470 unsigned char a2, b2 = 0, c2, d2 = 0, a3, b3 = 0, c3, d3 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4471 unsigned char a4, b4 = 0, c4, d4 = 0, a5, b5 = 0, c5, d5 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4472 for(i = 0; i + 5 < length; i += 6) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4473 c0 = b0; c1 = b1; c2 = b2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4474 c3 = b3; c4 = b4; c5 = b5;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4475 b0 = precon[i + 0]; b1 = precon[i + 1]; b2 = precon[i + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4476 b3 = precon[i + 3]; b4 = precon[i + 4]; b5 = precon[i + 5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4477 a0 = d0; a1 = d1; a2 = d2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4478 a3 = d3; a4 = d4; a5 = d5;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4479 d0 = scanline[i + 0] + paethPredictor(a0, b0, c0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4480 d1 = scanline[i + 1] + paethPredictor(a1, b1, c1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4481 d2 = scanline[i + 2] + paethPredictor(a2, b2, c2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4482 d3 = scanline[i + 3] + paethPredictor(a3, b3, c3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4483 d4 = scanline[i + 4] + paethPredictor(a4, b4, c4);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4484 d5 = scanline[i + 5] + paethPredictor(a5, b5, c5);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4485 recon[i + 0] = d0; recon[i + 1] = d1; recon[i + 2] = d2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4486 recon[i + 3] = d3; recon[i + 4] = d4; recon[i + 5] = d5;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4487 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4488 } else if(bytewidth == 4) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4489 unsigned char a0, b0 = 0, c0, d0 = 0, a1, b1 = 0, c1, d1 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4490 unsigned char a2, b2 = 0, c2, d2 = 0, a3, b3 = 0, c3, d3 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4491 for(i = 0; i + 3 < length; i += 4) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4492 c0 = b0; c1 = b1; c2 = b2; c3 = b3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4493 b0 = precon[i + 0]; b1 = precon[i + 1]; b2 = precon[i + 2]; b3 = precon[i + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4494 a0 = d0; a1 = d1; a2 = d2; a3 = d3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4495 d0 = scanline[i + 0] + paethPredictor(a0, b0, c0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4496 d1 = scanline[i + 1] + paethPredictor(a1, b1, c1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4497 d2 = scanline[i + 2] + paethPredictor(a2, b2, c2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4498 d3 = scanline[i + 3] + paethPredictor(a3, b3, c3);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4499 recon[i + 0] = d0; recon[i + 1] = d1; recon[i + 2] = d2; recon[i + 3] = d3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4500 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4501 } else if(bytewidth == 3) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4502 unsigned char a0, b0 = 0, c0, d0 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4503 unsigned char a1, b1 = 0, c1, d1 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4504 unsigned char a2, b2 = 0, c2, d2 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4505 for(i = 0; i + 2 < length; i += 3) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4506 c0 = b0; c1 = b1; c2 = b2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4507 b0 = precon[i + 0]; b1 = precon[i + 1]; b2 = precon[i + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4508 a0 = d0; a1 = d1; a2 = d2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4509 d0 = scanline[i + 0] + paethPredictor(a0, b0, c0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4510 d1 = scanline[i + 1] + paethPredictor(a1, b1, c1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4511 d2 = scanline[i + 2] + paethPredictor(a2, b2, c2);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4512 recon[i + 0] = d0; recon[i + 1] = d1; recon[i + 2] = d2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4513 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4514 } else if(bytewidth == 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4515 unsigned char a0, b0 = 0, c0, d0 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4516 unsigned char a1, b1 = 0, c1, d1 = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4517 for(i = 0; i + 1 < length; i += 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4518 c0 = b0; c1 = b1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4519 b0 = precon[i + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4520 b1 = precon[i + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4521 a0 = d0; a1 = d1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4522 d0 = scanline[i + 0] + paethPredictor(a0, b0, c0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4523 d1 = scanline[i + 1] + paethPredictor(a1, b1, c1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4524 recon[i + 0] = d0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4525 recon[i + 1] = d1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4526 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4527 } else if(bytewidth == 1) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4528 unsigned char a, b = 0, c, d = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4529 for(i = 0; i != length; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4530 c = b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4531 b = precon[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4532 a = d;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4533 d = scanline[i] + paethPredictor(a, b, c);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4534 recon[i] = d;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4535 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4536 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4537 /* Normally not a possible case, but this would handle it correctly */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4538 for(i = 0; i != bytewidth; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4539 recon[i] = (scanline[i] + precon[i]); /paethPredictor(0, precon[i], 0) is always precon[i]/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4540 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4541 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4542 /* finish any remaining bytes */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4543 for(; i != length; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4544 recon[i] = (scanline[i] + paethPredictor(recon[i - bytewidth], precon[i], precon[i - bytewidth]));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4545 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4546 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4547 size_t j = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4548 for(i = 0; i != bytewidth; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4549 recon[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4550 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4551 for(i = bytewidth; i != length; ++i, ++j) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4552 /paethPredictor(recon[i - bytewidth], 0, 0) is always recon[i - bytewidth]/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4553 recon[i] = (scanline[i] + recon[j]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4554 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4555 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4556 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4557 default: return 36; /error: invalid filter type given/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4558 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4559 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4560 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4561
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4562 static unsigned unfilter(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4563 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4564 For PNG filter method 0
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4565 this function unfilters a single image (e.g. without interlacing this is called once, with Adam7 seven times)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4566 out must have enough bytes allocated already, in must have the scanlines + 1 filtertype byte per scanline
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4567 w and h are image dimensions or dimensions of reduced image, bpp is bits per pixel
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4568 in and out are allowed to be the same memory address (but aren't the same size since in has the extra filter bytes)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4569 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4570
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4571 unsigned y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4572 unsigned char* prevline = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4573
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4574 /bytewidth is used for filtering, is 1 when bpp < 8, number of bytes per pixel otherwise/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4575 size_t bytewidth = (bpp + 7u) / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4576 /the width of a scanline in bytes, not including the filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4577 size_t linebytes = lodepng_get_raw_size_idat(w, 1, bpp) - 1u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4578
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4579 for(y = 0; y < h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4580 size_t outindex = linebytes * y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4581 size_t inindex = (1 + linebytes) * y; /the extra filterbyte added to each row/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4582 unsigned char filterType = in[inindex];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4583
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4584 CERROR_TRY_RETURN(unfilterScanline(&out[outindex], &in[inindex + 1], prevline, bytewidth, filterType, linebytes));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4585
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4586 prevline = &out[outindex];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4587 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4588
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4589 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4590 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4591
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4592 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4593 in: Adam7 interlaced image, with no padding bits between scanlines, but between
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4594 reduced images so that each reduced image starts at a byte.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4595 out: the same pixels, but re-ordered so that they're now a non-interlaced image with size w*h
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4596 bpp: bits per pixel
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4597 out has the following size in bits: w * h * bpp.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4598 in is possibly bigger due to padding bits between reduced images.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4599 out must be big enough AND must be 0 everywhere if bpp < 8 in the current implementation
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4600 (because that's likely a little bit faster)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4601 NOTE: comments about padding bits are only relevant if bpp < 8
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4602 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4603 static void Adam7_deinterlace(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4604 unsigned passw[7], passh[7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4605 size_t filter_passstart[8], padded_passstart[8], passstart[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4606 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4607
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4608 Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4609
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4610 if(bpp >= 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4611 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4612 unsigned x, y, b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4613 size_t bytewidth = bpp / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4614 for(y = 0; y < passh[i]; ++y)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4615 for(x = 0; x < passw[i]; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4616 size_t pixelinstart = passstart[i] + (y * passw[i] + x) * bytewidth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4617 size_t pixeloutstart = ((ADAM7_IY[i] + (size_t)y * ADAM7_DY[i]) * (size_t)w
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4618 + ADAM7_IX[i] + (size_t)x * ADAM7_DX[i]) * bytewidth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4619 for(b = 0; b < bytewidth; ++b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4620 out[pixeloutstart + b] = in[pixelinstart + b];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4621 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4622 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4623 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4624 } else /bpp < 8: Adam7 with pixels < 8 bit is a bit trickier: with bit pointers/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4625 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4626 unsigned x, y, b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4627 unsigned ilinebits = bpp * passw[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4628 unsigned olinebits = bpp * w;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4629 size_t obp, ibp; /bit pointers (for out and in buffer)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4630 for(y = 0; y < passh[i]; ++y)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4631 for(x = 0; x < passw[i]; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4632 ibp = (8 * passstart[i]) + (y * ilinebits + x * bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4633 obp = (ADAM7_IY[i] + (size_t)y * ADAM7_DY[i]) * olinebits + (ADAM7_IX[i] + (size_t)x * ADAM7_DX[i]) * bpp;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4634 for(b = 0; b < bpp; ++b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4635 unsigned char bit = readBitFromReversedStream(&ibp, in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4636 setBitOfReversedStream(&obp, out, bit);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4637 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4638 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4639 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4640 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4641 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4642
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4643 static void removePaddingBits(unsigned char* out, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4644 size_t olinebits, size_t ilinebits, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4645 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4646 After filtering there are still padding bits if scanlines have non multiple of 8 bit amounts. They need
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4647 to be removed (except at last scanline of (Adam7-reduced) image) before working with pure image buffers
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4648 for the Adam7 code, the color convert code and the output to the user.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4649 in and out are allowed to be the same buffer, in may also be higher but still overlapping; in must
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4650 have >= ilinebitsh bits, out must have >= olinebitsh bits, olinebits must be <= ilinebits
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4651 also used to move bits after earlier such operations happened, e.g. in a sequence of reduced images from Adam7
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4652 only useful if (ilinebits - olinebits) is a value in the range 1..7
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4653 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4654 unsigned y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4655 size_t diff = ilinebits - olinebits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4656 size_t ibp = 0, obp = 0; /input and output bit pointers/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4657 for(y = 0; y < h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4658 size_t x;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4659 for(x = 0; x < olinebits; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4660 unsigned char bit = readBitFromReversedStream(&ibp, in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4661 setBitOfReversedStream(&obp, out, bit);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4662 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4663 ibp += diff;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4664 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4665 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4666
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4667 /*out must be buffer big enough to contain full image, and in must contain the full decompressed data from
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4668 the IDAT chunks (with filter index bytes and possible padding bits)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4669 return value is error*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4670 static unsigned postProcessScanlines(unsigned char* out, unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4671 unsigned w, unsigned h, const LodePNGInfo* info_png) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4672 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4673 This function converts the filtered-padded-interlaced data into pure 2D image buffer with the PNG's colortype.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4674 Steps:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4675 *) if no Adam7: 1) unfilter 2) remove padding bits (= possible extra bits per scanline if bpp < 8)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4676 *) if adam7: 1) 7x unfilter 2) 7x remove padding bits 3) Adam7_deinterlace
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4677 NOTE: the in buffer will be overwritten with intermediate data!
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4678 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4679 unsigned bpp = lodepng_get_bpp(&info_png->color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4680 if(bpp == 0) return 31; /error: invalid colortype/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4681
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4682 if(info_png->interlace_method == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4683 if(bpp < 8 && w * bpp != ((w * bpp + 7u) / 8u) * 8u) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4684 CERROR_TRY_RETURN(unfilter(in, in, w, h, bpp));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4685 removePaddingBits(out, in, w * bpp, ((w * bpp + 7u) / 8u) * 8u, h);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4686 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4687 /we can immediately filter into the out buffer, no other steps needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4688 else CERROR_TRY_RETURN(unfilter(out, in, w, h, bpp));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4689 } else /interlace_method is 1 (Adam7)/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4690 unsigned passw[7], passh[7]; size_t filter_passstart[8], padded_passstart[8], passstart[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4691 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4692
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4693 Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4694
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4695 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4696 CERROR_TRY_RETURN(unfilter(&in[padded_passstart[i]], &in[filter_passstart[i]], passw[i], passh[i], bpp));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4697 /*TODO: possible efficiency improvement: if in this reduced image the bits fit nicely in 1 scanline,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4698 move bytes instead of bits or move not at all*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4699 if(bpp < 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4700 /*remove padding bits in scanlines; after this there still may be padding
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4701 bits between the different reduced images: each reduced image still starts nicely at a byte*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4702 removePaddingBits(&in[passstart[i]], &in[padded_passstart[i]], passw[i] * bpp,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4703 ((passw[i] * bpp + 7u) / 8u) * 8u, passh[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4704 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4705 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4706
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4707 Adam7_deinterlace(out, in, w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4708 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4709
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4710 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4711 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4712
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4713 static unsigned readChunk_PLTE(LodePNGColorMode* color, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4714 unsigned pos = 0, i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4715 color->palettesize = chunkLength / 3u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4716 if(color->palettesize == 0 \|\| color->palettesize > 256) return 38; /error: palette too small or big/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4717 lodepng_color_mode_alloc_palette(color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4718 if(!color->palette && color->palettesize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4719 color->palettesize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4720 return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4721 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4722
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4723 for(i = 0; i != color->palettesize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4724 color->palette[4 * i + 0] = data[pos++]; /R/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4725 color->palette[4 * i + 1] = data[pos++]; /G/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4726 color->palette[4 * i + 2] = data[pos++]; /B/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4727 color->palette[4 * i + 3] = 255; /alpha/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4728 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4729
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4730 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4731 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4732
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4733 static unsigned readChunk_tRNS(LodePNGColorMode* color, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4734 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4735 if(color->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4736 /error: more alpha values given than there are palette entries/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4737 if(chunkLength > color->palettesize) return 39;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4738
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4739 for(i = 0; i != chunkLength; ++i) color->palette[4 * i + 3] = data[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4740 } else if(color->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4741 /error: this chunk must be 2 bytes for grayscale image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4742 if(chunkLength != 2) return 30;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4743
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4744 color->key_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4745 color->key_r = color->key_g = color->key_b = 256u * data[0] + data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4746 } else if(color->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4747 /error: this chunk must be 6 bytes for RGB image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4748 if(chunkLength != 6) return 41;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4749
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4750 color->key_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4751 color->key_r = 256u * data[0] + data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4752 color->key_g = 256u * data[2] + data[3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4753 color->key_b = 256u * data[4] + data[5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4754 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4755 else return 42; /error: tRNS chunk not allowed for other color models/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4756
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4757 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4758 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4759
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4760
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4761 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4762 /background color chunk (bKGD)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4763 static unsigned readChunk_bKGD(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4764 if(info->color.colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4765 /error: this chunk must be 1 byte for indexed color image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4766 if(chunkLength != 1) return 43;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4767
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4768 /error: invalid palette index, or maybe this chunk appeared before PLTE/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4769 if(data[0] >= info->color.palettesize) return 103;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4770
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4771 info->background_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4772 info->background_r = info->background_g = info->background_b = data[0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4773 } else if(info->color.colortype == LCT_GREY \|\| info->color.colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4774 /error: this chunk must be 2 bytes for grayscale image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4775 if(chunkLength != 2) return 44;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4776
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4777 /the values are truncated to bitdepth in the PNG file/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4778 info->background_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4779 info->background_r = info->background_g = info->background_b = 256u * data[0] + data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4780 } else if(info->color.colortype == LCT_RGB \|\| info->color.colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4781 /error: this chunk must be 6 bytes for grayscale image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4782 if(chunkLength != 6) return 45;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4783
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4784 /the values are truncated to bitdepth in the PNG file/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4785 info->background_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4786 info->background_r = 256u * data[0] + data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4787 info->background_g = 256u * data[2] + data[3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4788 info->background_b = 256u * data[4] + data[5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4789 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4790
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4791 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4792 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4793
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4794 /text chunk (tEXt)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4795 static unsigned readChunk_tEXt(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4796 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4797 char key = 0, str = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4798
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4799 while(!error) /not really a while loop, only used to break on error/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4800 unsigned length, string2_begin;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4801
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4802 length = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4803 while(length < chunkLength && data[length] != 0) ++length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4804 /*even though it's not allowed by the standard, no error is thrown if
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4805 there's no null termination char, if the text is empty*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4806 if(length < 1 \|\| length > 79) CERROR_BREAK(error, 89); /keyword too short or long/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4807
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4808 key = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4809 if(!key) CERROR_BREAK(error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4810
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4811 lodepng_memcpy(key, data, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4812 key[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4813
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4814 string2_begin = length + 1; /skip keyword null terminator/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4815
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4816 length = (unsigned)(chunkLength < string2_begin ? 0 : chunkLength - string2_begin);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4817 str = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4818 if(!str) CERROR_BREAK(error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4819
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4820 lodepng_memcpy(str, data + string2_begin, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4821 str[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4822
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4823 error = lodepng_add_text(info, key, str);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4824
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4825 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4826 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4827
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4828 lodepng_free(key);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4829 lodepng_free(str);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4830
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4831 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4832 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4833
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4834 /compressed text chunk (zTXt)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4835 static unsigned readChunk_zTXt(LodePNGInfo* info, const LodePNGDecoderSettings* decoder,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4836 const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4837 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4838
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4839 /copy the object to change parameters in it/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4840 LodePNGDecompressSettings zlibsettings = decoder->zlibsettings;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4841
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4842 unsigned length, string2_begin;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4843 char *key = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4844 unsigned char* str = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4845 size_t size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4846
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4847 while(!error) /not really a while loop, only used to break on error/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4848 for(length = 0; length < chunkLength && data[length] != 0; ++length) ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4849 if(length + 2 >= chunkLength) CERROR_BREAK(error, 75); /no null termination, corrupt?/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4850 if(length < 1 \|\| length > 79) CERROR_BREAK(error, 89); /keyword too short or long/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4851
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4852 key = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4853 if(!key) CERROR_BREAK(error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4854
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4855 lodepng_memcpy(key, data, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4856 key[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4857
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4858 if(data[length + 1] != 0) CERROR_BREAK(error, 72); /the 0 byte indicating compression must be 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4859
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4860 string2_begin = length + 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4861 if(string2_begin > chunkLength) CERROR_BREAK(error, 75); /no null termination, corrupt?/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4862
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4863 length = (unsigned)chunkLength - string2_begin;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4864 zlibsettings.max_output_size = decoder->max_text_size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4865 /will fail if zlib error, e.g. if length is too small/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4866 error = zlib_decompress(&str, &size, 0, &data[string2_begin],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4867 length, &zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4868 /error: compressed text larger than decoder->max_text_size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4869 if(error && size > zlibsettings.max_output_size) error = 112;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4870 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4871 error = lodepng_add_text_sized(info, key, (char*)str, size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4872 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4873 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4874
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4875 lodepng_free(key);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4876 lodepng_free(str);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4877
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4878 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4879 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4880
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4881 /international text chunk (iTXt)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4882 static unsigned readChunk_iTXt(LodePNGInfo* info, const LodePNGDecoderSettings* decoder,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4883 const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4884 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4885 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4886
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4887 /copy the object to change parameters in it/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4888 LodePNGDecompressSettings zlibsettings = decoder->zlibsettings;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4889
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4890 unsigned length, begin, compressed;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4891 char key = 0, langtag = 0, *transkey = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4892
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4893 while(!error) /not really a while loop, only used to break on error/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4894 /*Quick check if the chunk length isn't too small. Even without check
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4895 it'd still fail with other error checks below if it's too short. This just gives a different error code.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4896 if(chunkLength < 5) CERROR_BREAK(error, 30); /iTXt chunk too short/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4897
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4898 /read the key/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4899 for(length = 0; length < chunkLength && data[length] != 0; ++length) ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4900 if(length + 3 >= chunkLength) CERROR_BREAK(error, 75); /no null termination char, corrupt?/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4901 if(length < 1 \|\| length > 79) CERROR_BREAK(error, 89); /keyword too short or long/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4902
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4903 key = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4904 if(!key) CERROR_BREAK(error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4905
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4906 lodepng_memcpy(key, data, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4907 key[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4908
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4909 /read the compression method/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4910 compressed = data[length + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4911 if(data[length + 2] != 0) CERROR_BREAK(error, 72); /the 0 byte indicating compression must be 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4912
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4913 /*even though it's not allowed by the standard, no error is thrown if
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4914 there's no null termination char, if the text is empty for the next 3 texts*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4915
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4916 /read the langtag/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4917 begin = length + 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4918 length = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4919 for(i = begin; i < chunkLength && data[i] != 0; ++i) ++length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4920
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4921 langtag = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4922 if(!langtag) CERROR_BREAK(error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4923
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4924 lodepng_memcpy(langtag, data + begin, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4925 langtag[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4926
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4927 /read the transkey/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4928 begin += length + 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4929 length = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4930 for(i = begin; i < chunkLength && data[i] != 0; ++i) ++length;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4931
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4932 transkey = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4933 if(!transkey) CERROR_BREAK(error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4934
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4935 lodepng_memcpy(transkey, data + begin, length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4936 transkey[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4937
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4938 /read the actual text/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4939 begin += length + 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4940
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4941 length = (unsigned)chunkLength < begin ? 0 : (unsigned)chunkLength - begin;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4942
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4943 if(compressed) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4944 unsigned char* str = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4945 size_t size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4946 zlibsettings.max_output_size = decoder->max_text_size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4947 /will fail if zlib error, e.g. if length is too small/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4948 error = zlib_decompress(&str, &size, 0, &data[begin],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4949 length, &zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4950 /error: compressed text larger than decoder->max_text_size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4951 if(error && size > zlibsettings.max_output_size) error = 112;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4952 if(!error) error = lodepng_add_itext_sized(info, key, langtag, transkey, (char*)str, size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4953 lodepng_free(str);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4954 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4955 error = lodepng_add_itext_sized(info, key, langtag, transkey, (char*)(data + begin), length);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4956 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4957
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4958 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4959 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4960
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4961 lodepng_free(key);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4962 lodepng_free(langtag);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4963 lodepng_free(transkey);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4964
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4965 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4966 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4967
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4968 static unsigned readChunk_tIME(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4969 if(chunkLength != 7) return 73; /invalid tIME chunk size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4970
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4971 info->time_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4972 info->time.year = 256u * data[0] + data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4973 info->time.month = data[2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4974 info->time.day = data[3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4975 info->time.hour = data[4];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4976 info->time.minute = data[5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4977 info->time.second = data[6];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4978
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4979 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4980 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4981
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4982 static unsigned readChunk_pHYs(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4983 if(chunkLength != 9) return 74; /invalid pHYs chunk size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4984
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4985 info->phys_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4986 info->phys_x = 16777216u * data[0] + 65536u * data[1] + 256u * data[2] + data[3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4987 info->phys_y = 16777216u * data[4] + 65536u * data[5] + 256u * data[6] + data[7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4988 info->phys_unit = data[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4989
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4990 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4991 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4992
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4993 static unsigned readChunk_gAMA(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4994 if(chunkLength != 4) return 96; /invalid gAMA chunk size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4995
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4996 info->gama_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4997 info->gama_gamma = 16777216u * data[0] + 65536u * data[1] + 256u * data[2] + data[3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4998
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	4999 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5000 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5001
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5002 static unsigned readChunk_cHRM(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5003 if(chunkLength != 32) return 97; /invalid cHRM chunk size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5004
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5005 info->chrm_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5006 info->chrm_white_x = 16777216u * data[ 0] + 65536u * data[ 1] + 256u * data[ 2] + data[ 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5007 info->chrm_white_y = 16777216u * data[ 4] + 65536u * data[ 5] + 256u * data[ 6] + data[ 7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5008 info->chrm_red_x = 16777216u * data[ 8] + 65536u * data[ 9] + 256u * data[10] + data[11];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5009 info->chrm_red_y = 16777216u * data[12] + 65536u * data[13] + 256u * data[14] + data[15];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5010 info->chrm_green_x = 16777216u * data[16] + 65536u * data[17] + 256u * data[18] + data[19];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5011 info->chrm_green_y = 16777216u * data[20] + 65536u * data[21] + 256u * data[22] + data[23];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5012 info->chrm_blue_x = 16777216u * data[24] + 65536u * data[25] + 256u * data[26] + data[27];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5013 info->chrm_blue_y = 16777216u * data[28] + 65536u * data[29] + 256u * data[30] + data[31];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5014
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5015 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5016 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5017
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5018 static unsigned readChunk_sRGB(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5019 if(chunkLength != 1) return 98; /invalid sRGB chunk size (this one is never ignored)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5020
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5021 info->srgb_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5022 info->srgb_intent = data[0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5023
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5024 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5025 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5026
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5027 static unsigned readChunk_iCCP(LodePNGInfo* info, const LodePNGDecoderSettings* decoder,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5028 const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5029 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5030 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5031 size_t size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5032 /copy the object to change parameters in it/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5033 LodePNGDecompressSettings zlibsettings = decoder->zlibsettings;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5034
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5035 unsigned length, string2_begin;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5036
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5037 info->iccp_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5038 if(info->iccp_name) lodepng_clear_icc(info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5039
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5040 for(length = 0; length < chunkLength && data[length] != 0; ++length) ;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5041 if(length + 2 >= chunkLength) return 75; /no null termination, corrupt?/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5042 if(length < 1 \|\| length > 79) return 89; /keyword too short or long/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5043
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5044 info->iccp_name = (char*)lodepng_malloc(length + 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5045 if(!info->iccp_name) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5046
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5047 info->iccp_name[length] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5048 for(i = 0; i != length; ++i) info->iccp_name[i] = (char)data[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5049
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5050 if(data[length + 1] != 0) return 72; /the 0 byte indicating compression must be 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5051
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5052 string2_begin = length + 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5053 if(string2_begin > chunkLength) return 75; /no null termination, corrupt?/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5054
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5055 length = (unsigned)chunkLength - string2_begin;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5056 zlibsettings.max_output_size = decoder->max_icc_size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5057 error = zlib_decompress(&info->iccp_profile, &size, 0,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5058 &data[string2_begin],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5059 length, &zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5060 /error: ICC profile larger than decoder->max_icc_size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5061 if(error && size > zlibsettings.max_output_size) error = 113;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5062 info->iccp_profile_size = size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5063 if(!error && !info->iccp_profile_size) error = 100; /invalid ICC profile size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5064 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5065 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5066
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5067 /significant bits chunk (sBIT)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5068 static unsigned readChunk_sBIT(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5069 unsigned bitdepth = (info->color.colortype == LCT_PALETTE) ? 8 : info->color.bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5070 if(info->color.colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5071 /error: this chunk must be 1 bytes for grayscale image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5072 if(chunkLength != 1) return 114;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5073 if(data[0] == 0 \|\| data[0] > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5074 info->sbit_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5075 info->sbit_r = info->sbit_g = info->sbit_b = data[0]; /setting g and b is not required, but sensible/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5076 } else if(info->color.colortype == LCT_RGB \|\| info->color.colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5077 /error: this chunk must be 3 bytes for RGB and palette image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5078 if(chunkLength != 3) return 114;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5079 if(data[0] == 0 \|\| data[1] == 0 \|\| data[2] == 0) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5080 if(data[0] > bitdepth \|\| data[1] > bitdepth \|\| data[2] > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5081 info->sbit_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5082 info->sbit_r = data[0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5083 info->sbit_g = data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5084 info->sbit_b = data[2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5085 } else if(info->color.colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5086 /error: this chunk must be 2 byte for grayscale with alpha image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5087 if(chunkLength != 2) return 114;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5088 if(data[0] == 0 \|\| data[1] == 0) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5089 if(data[0] > bitdepth \|\| data[1] > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5090 info->sbit_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5091 info->sbit_r = info->sbit_g = info->sbit_b = data[0]; /setting g and b is not required, but sensible/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5092 info->sbit_a = data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5093 } else if(info->color.colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5094 /error: this chunk must be 4 bytes for grayscale image/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5095 if(chunkLength != 4) return 114;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5096 if(data[0] == 0 \|\| data[1] == 0 \|\| data[2] == 0 \|\| data[3] == 0) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5097 if(data[0] > bitdepth \|\| data[1] > bitdepth \|\| data[2] > bitdepth \|\| data[3] > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5098 info->sbit_defined = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5099 info->sbit_r = data[0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5100 info->sbit_g = data[1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5101 info->sbit_b = data[2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5102 info->sbit_a = data[3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5103 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5104
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5105 return 0; /* OK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5106 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5107 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5108
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5109 unsigned lodepng_inspect_chunk(LodePNGState* state, size_t pos,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5110 const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5111 const unsigned char* chunk = in + pos;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5112 unsigned chunkLength;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5113 const unsigned char* data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5114 unsigned unhandled = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5115 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5116
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5117 if(pos + 4 > insize) return 30;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5118 chunkLength = lodepng_chunk_length(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5119 if(chunkLength > 2147483647) return 63;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5120 data = lodepng_chunk_data_const(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5121 if(chunkLength + 12 > insize - pos) return 30;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5122
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5123 if(lodepng_chunk_type_equals(chunk, "PLTE")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5124 error = readChunk_PLTE(&state->info_png.color, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5125 } else if(lodepng_chunk_type_equals(chunk, "tRNS")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5126 error = readChunk_tRNS(&state->info_png.color, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5127 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5128 } else if(lodepng_chunk_type_equals(chunk, "bKGD")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5129 error = readChunk_bKGD(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5130 } else if(lodepng_chunk_type_equals(chunk, "tEXt")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5131 error = readChunk_tEXt(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5132 } else if(lodepng_chunk_type_equals(chunk, "zTXt")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5133 error = readChunk_zTXt(&state->info_png, &state->decoder, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5134 } else if(lodepng_chunk_type_equals(chunk, "iTXt")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5135 error = readChunk_iTXt(&state->info_png, &state->decoder, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5136 } else if(lodepng_chunk_type_equals(chunk, "tIME")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5137 error = readChunk_tIME(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5138 } else if(lodepng_chunk_type_equals(chunk, "pHYs")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5139 error = readChunk_pHYs(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5140 } else if(lodepng_chunk_type_equals(chunk, "gAMA")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5141 error = readChunk_gAMA(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5142 } else if(lodepng_chunk_type_equals(chunk, "cHRM")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5143 error = readChunk_cHRM(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5144 } else if(lodepng_chunk_type_equals(chunk, "sRGB")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5145 error = readChunk_sRGB(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5146 } else if(lodepng_chunk_type_equals(chunk, "iCCP")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5147 error = readChunk_iCCP(&state->info_png, &state->decoder, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5148 } else if(lodepng_chunk_type_equals(chunk, "sBIT")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5149 error = readChunk_sBIT(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5150 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5151 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5152 /* unhandled chunk is ok (is not an error) */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5153 unhandled = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5154 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5155
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5156 if(!error && !unhandled && !state->decoder.ignore_crc) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5157 if(lodepng_chunk_check_crc(chunk)) return 57; /invalid CRC/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5158 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5159
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5160 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5161 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5162
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5163 /read a PNG, the result will be in the same color type as the PNG (hence "generic")/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5164 static void decodeGeneric(unsigned char** out, unsigned* w, unsigned* h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5165 LodePNGState* state,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5166 const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5167 unsigned char IEND = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5168 const unsigned char* chunk; /points to beginning of next chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5169 unsigned char* idat; /the data from idat chunks, zlib compressed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5170 size_t idatsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5171 unsigned char* scanlines = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5172 size_t scanlines_size = 0, expected_size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5173 size_t outsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5174
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5175 /for unknown chunk order/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5176 unsigned unknown = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5177 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5178 unsigned critical_pos = 1; /1 = after IHDR, 2 = after PLTE, 3 = after IDAT/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5179 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5180
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5181
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5182 /* safe output values in case error happens */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5183 *out = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5184 w = h = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5185
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5186 state->error = lodepng_inspect(w, h, state, in, insize); /reads header and resets other parameters in state->info_png/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5187 if(state->error) return;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5188
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5189 if(lodepng_pixel_overflow(w, h, &state->info_png.color, &state->info_raw)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5190 CERROR_RETURN(state->error, 92); /overflow possible due to amount of pixels/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5191 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5192
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5193 /the input filesize is a safe upper bound for the sum of idat chunks size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5194 idat = (unsigned char*)lodepng_malloc(insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5195 if(!idat) CERROR_RETURN(state->error, 83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5196
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5197 chunk = &in[33]; /first byte of the first chunk after the header/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5198
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5199 /*loop through the chunks, ignoring unknown chunks and stopping at IEND chunk.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5200 IDAT data is put at the start of the in buffer*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5201 while(!IEND && !state->error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5202 unsigned chunkLength;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5203 const unsigned char* data; /the data in the chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5204 size_t pos = (size_t)(chunk - in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5205
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5206 /error: next chunk out of bounds of the in buffer/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5207 if(chunk < in \|\| pos + 12 > insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5208 if(state->decoder.ignore_end) break; /other errors may still happen though/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5209 CERROR_BREAK(state->error, 30);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5210 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5211
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5212 /length of the data of the chunk, excluding the 12 bytes for length, chunk type and CRC/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5213 chunkLength = lodepng_chunk_length(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5214 /error: chunk length larger than the max PNG chunk size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5215 if(chunkLength > 2147483647) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5216 if(state->decoder.ignore_end) break; /other errors may still happen though/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5217 CERROR_BREAK(state->error, 63);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5218 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5219
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5220 if(pos + (size_t)chunkLength + 12 > insize \|\| pos + (size_t)chunkLength + 12 < pos) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5221 CERROR_BREAK(state->error, 64); /error: size of the in buffer too small to contain next chunk (or int overflow)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5222 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5223
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5224 data = lodepng_chunk_data_const(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5225
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5226 unknown = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5227
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5228 /IDAT chunk, containing compressed image data/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5229 if(lodepng_chunk_type_equals(chunk, "IDAT")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5230 size_t newsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5231 if(lodepng_addofl(idatsize, chunkLength, &newsize)) CERROR_BREAK(state->error, 95);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5232 if(newsize > insize) CERROR_BREAK(state->error, 95);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5233 lodepng_memcpy(idat + idatsize, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5234 idatsize += chunkLength;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5235 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5236 critical_pos = 3;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5237 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5238 } else if(lodepng_chunk_type_equals(chunk, "IEND")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5239 /IEND chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5240 IEND = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5241 } else if(lodepng_chunk_type_equals(chunk, "PLTE")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5242 /palette chunk (PLTE)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5243 state->error = readChunk_PLTE(&state->info_png.color, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5244 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5245 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5246 critical_pos = 2;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5247 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5248 } else if(lodepng_chunk_type_equals(chunk, "tRNS")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5249 /*palette transparency chunk (tRNS). Even though this one is an ancillary chunk , it is still compiled
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5250 in without 'LODEPNG_COMPILE_ANCILLARY_CHUNKS' because it contains essential color information that
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5251 affects the alpha channel of pixels. */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5252 state->error = readChunk_tRNS(&state->info_png.color, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5253 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5254 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5255 /background color chunk (bKGD)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5256 } else if(lodepng_chunk_type_equals(chunk, "bKGD")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5257 state->error = readChunk_bKGD(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5258 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5259 } else if(lodepng_chunk_type_equals(chunk, "tEXt")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5260 /text chunk (tEXt)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5261 if(state->decoder.read_text_chunks) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5262 state->error = readChunk_tEXt(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5263 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5264 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5265 } else if(lodepng_chunk_type_equals(chunk, "zTXt")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5266 /compressed text chunk (zTXt)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5267 if(state->decoder.read_text_chunks) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5268 state->error = readChunk_zTXt(&state->info_png, &state->decoder, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5269 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5270 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5271 } else if(lodepng_chunk_type_equals(chunk, "iTXt")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5272 /international text chunk (iTXt)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5273 if(state->decoder.read_text_chunks) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5274 state->error = readChunk_iTXt(&state->info_png, &state->decoder, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5275 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5276 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5277 } else if(lodepng_chunk_type_equals(chunk, "tIME")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5278 state->error = readChunk_tIME(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5279 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5280 } else if(lodepng_chunk_type_equals(chunk, "pHYs")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5281 state->error = readChunk_pHYs(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5282 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5283 } else if(lodepng_chunk_type_equals(chunk, "gAMA")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5284 state->error = readChunk_gAMA(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5285 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5286 } else if(lodepng_chunk_type_equals(chunk, "cHRM")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5287 state->error = readChunk_cHRM(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5288 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5289 } else if(lodepng_chunk_type_equals(chunk, "sRGB")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5290 state->error = readChunk_sRGB(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5291 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5292 } else if(lodepng_chunk_type_equals(chunk, "iCCP")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5293 state->error = readChunk_iCCP(&state->info_png, &state->decoder, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5294 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5295 } else if(lodepng_chunk_type_equals(chunk, "sBIT")) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5296 state->error = readChunk_sBIT(&state->info_png, data, chunkLength);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5297 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5298 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5299 } else /it's not an implemented chunk type, so ignore it: skip over the data/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5300 /error: unknown critical chunk (5th bit of first byte of chunk type is 0)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5301 if(!state->decoder.ignore_critical && !lodepng_chunk_ancillary(chunk)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5302 CERROR_BREAK(state->error, 69);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5303 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5304
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5305 unknown = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5306 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5307 if(state->decoder.remember_unknown_chunks) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5308 state->error = lodepng_chunk_append(&state->info_png.unknown_chunks_data[critical_pos - 1],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5309 &state->info_png.unknown_chunks_size[critical_pos - 1], chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5310 if(state->error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5311 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5312 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5313 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5314
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5315 if(!state->decoder.ignore_crc && !unknown) /check CRC if wanted, only on known chunk types/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5316 if(lodepng_chunk_check_crc(chunk)) CERROR_BREAK(state->error, 57); /invalid CRC/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5317 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5318
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5319 if(!IEND) chunk = lodepng_chunk_next_const(chunk, in + insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5320 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5321
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5322 if(!state->error && state->info_png.color.colortype == LCT_PALETTE && !state->info_png.color.palette) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5323 state->error = 106; /* error: PNG file must have PLTE chunk if color type is palette */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5324 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5325
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5326 if(!state->error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5327 /*predict output size, to allocate exact size for output buffer to avoid more dynamic allocation.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5328 If the decompressed size does not match the prediction, the image must be corrupt.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5329 if(state->info_png.interlace_method == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5330 size_t bpp = lodepng_get_bpp(&state->info_png.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5331 expected_size = lodepng_get_raw_size_idat(w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5332 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5333 size_t bpp = lodepng_get_bpp(&state->info_png.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5334 /Adam-7 interlaced: expected size is the sum of the 7 sub-images sizes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5335 expected_size = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5336 expected_size += lodepng_get_raw_size_idat((w + 7) >> 3, (h + 7) >> 3, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5337 if(w > 4) expected_size += lodepng_get_raw_size_idat((w + 3) >> 3, (*h + 7) >> 3, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5338 expected_size += lodepng_get_raw_size_idat((w + 3) >> 2, (h + 3) >> 3, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5339 if(w > 2) expected_size += lodepng_get_raw_size_idat((w + 1) >> 2, (*h + 3) >> 2, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5340 expected_size += lodepng_get_raw_size_idat((w + 1) >> 1, (h + 1) >> 2, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5341 if(w > 1) expected_size += lodepng_get_raw_size_idat((w + 0) >> 1, (*h + 1) >> 1, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5342 expected_size += lodepng_get_raw_size_idat((w + 0), (h + 0) >> 1, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5343 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5344
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5345 state->error = zlib_decompress(&scanlines, &scanlines_size, expected_size, idat, idatsize, &state->decoder.zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5346 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5347 if(!state->error && scanlines_size != expected_size) state->error = 91; /decompressed size doesn't match prediction/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5348 lodepng_free(idat);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5349
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5350 if(!state->error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5351 outsize = lodepng_get_raw_size(w, h, &state->info_png.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5352 out = (unsigned char)lodepng_malloc(outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5353 if(!out) state->error = 83; /alloc fail*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5354 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5355 if(!state->error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5356 lodepng_memset(*out, 0, outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5357 state->error = postProcessScanlines(out, scanlines, w, *h, &state->info_png);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5358 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5359 lodepng_free(scanlines);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5360 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5361
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5362 unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5363 LodePNGState* state,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5364 const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5365 *out = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5366 decodeGeneric(out, w, h, state, in, insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5367 if(state->error) return state->error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5368 if(!state->decoder.color_convert \|\| lodepng_color_mode_equal(&state->info_raw, &state->info_png.color)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5369 /same color type, no copying or converting of data needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5370 /*store the info_png color settings on the info_raw so that the info_raw still reflects what colortype
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5371 the raw image has to the end user*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5372 if(!state->decoder.color_convert) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5373 state->error = lodepng_color_mode_copy(&state->info_raw, &state->info_png.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5374 if(state->error) return state->error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5375 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5376 } else { /color conversion needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5377 unsigned char* data = *out;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5378 size_t outsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5379
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5380 /*TODO: check if this works according to the statement in the documentation: "The converter can convert
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5381 from grayscale input color type, to 8-bit grayscale or grayscale with alpha"*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5382 if(!(state->info_raw.colortype == LCT_RGB \|\| state->info_raw.colortype == LCT_RGBA)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5383 && !(state->info_raw.bitdepth == 8)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5384 return 56; /unsupported color mode conversion/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5385 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5386
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5387 outsize = lodepng_get_raw_size(w, h, &state->info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5388 out = (unsigned char)lodepng_malloc(outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5389 if(!(*out)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5390 state->error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5391 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5392 else state->error = lodepng_convert(*out, data, &state->info_raw,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5393 &state->info_png.color, w, h);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5394 lodepng_free(data);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5395 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5396 return state->error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5397 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5398
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5399 unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5400 size_t insize, LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5401 unsigned error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5402 LodePNGState state;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5403 lodepng_state_init(&state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5404 state.info_raw.colortype = colortype;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5405 state.info_raw.bitdepth = bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5406 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5407 /disable reading things that this function doesn't output/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5408 state.decoder.read_text_chunks = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5409 state.decoder.remember_unknown_chunks = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5410 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5411 error = lodepng_decode(out, w, h, &state, in, insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5412 lodepng_state_cleanup(&state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5413 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5414 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5415
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5416 unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5417 return lodepng_decode_memory(out, w, h, in, insize, LCT_RGBA, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5418 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5419
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5420 unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5421 return lodepng_decode_memory(out, w, h, in, insize, LCT_RGB, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5422 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5423
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5424 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5425 unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5426 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5427 unsigned char* buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5428 size_t buffersize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5429 unsigned error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5430 /* safe output values in case error happens */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5431 *out = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5432 w = h = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5433 error = lodepng_load_file(&buffer, &buffersize, filename);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5434 if(!error) error = lodepng_decode_memory(out, w, h, buffer, buffersize, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5435 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5436 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5437 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5438
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5439 unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5440 return lodepng_decode_file(out, w, h, filename, LCT_RGBA, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5441 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5442
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5443 unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5444 return lodepng_decode_file(out, w, h, filename, LCT_RGB, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5445 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5446 #endif /LODEPNG_COMPILE_DISK/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5447
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5448 void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5449 settings->color_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5450 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5451 settings->read_text_chunks = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5452 settings->remember_unknown_chunks = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5453 settings->max_text_size = 16777216;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5454 settings->max_icc_size = 16777216; /* 16MB is much more than enough for any reasonable ICC profile */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5455 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5456 settings->ignore_crc = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5457 settings->ignore_critical = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5458 settings->ignore_end = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5459 lodepng_decompress_settings_init(&settings->zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5460 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5461
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5462 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5463
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5464 #if defined(LODEPNG_COMPILE_DECODER) \|\| defined(LODEPNG_COMPILE_ENCODER)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5465
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5466 void lodepng_state_init(LodePNGState* state) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5467 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5468 lodepng_decoder_settings_init(&state->decoder);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5469 #endif /LODEPNG_COMPILE_DECODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5470 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5471 lodepng_encoder_settings_init(&state->encoder);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5472 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5473 lodepng_color_mode_init(&state->info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5474 lodepng_info_init(&state->info_png);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5475 state->error = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5476 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5477
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5478 void lodepng_state_cleanup(LodePNGState* state) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5479 lodepng_color_mode_cleanup(&state->info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5480 lodepng_info_cleanup(&state->info_png);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5481 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5482
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5483 void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5484 lodepng_state_cleanup(dest);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5485 dest = source;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5486 lodepng_color_mode_init(&dest->info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5487 lodepng_info_init(&dest->info_png);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5488 dest->error = lodepng_color_mode_copy(&dest->info_raw, &source->info_raw); if(dest->error) return;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5489 dest->error = lodepng_info_copy(&dest->info_png, &source->info_png); if(dest->error) return;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5490 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5491
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5492 #endif /* defined(LODEPNG_COMPILE_DECODER) \|\| defined(LODEPNG_COMPILE_ENCODER) */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5493
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5494 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5495
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5496 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5497 /* / PNG Encoder / */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5498 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5499
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5500
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5501 static unsigned writeSignature(ucvector* out) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5502 size_t pos = out->size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5503 const unsigned char signature[] = {137, 80, 78, 71, 13, 10, 26, 10};
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5504 /8 bytes PNG signature, aka the magic bytes/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5505 if(!ucvector_resize(out, out->size + 8)) return 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5506 lodepng_memcpy(out->data + pos, signature, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5507 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5508 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5509
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5510 static unsigned addChunk_IHDR(ucvector* out, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5511 LodePNGColorType colortype, unsigned bitdepth, unsigned interlace_method) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5512 unsigned char chunk, data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5513 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 13, "IHDR"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5514 data = chunk + 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5515
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5516 lodepng_set32bitInt(data + 0, w); /width/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5517 lodepng_set32bitInt(data + 4, h); /height/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5518 data[8] = (unsigned char)bitdepth; /bit depth/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5519 data[9] = (unsigned char)colortype; /color type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5520 data[10] = 0; /compression method/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5521 data[11] = 0; /filter method/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5522 data[12] = interlace_method; /interlace method/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5523
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5524 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5525 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5526 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5527
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5528 /* only adds the chunk if needed (there is a key or palette with alpha) */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5529 static unsigned addChunk_PLTE(ucvector* out, const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5530 unsigned char* chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5531 size_t i, j = 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5532
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5533 if(info->palettesize == 0 \|\| info->palettesize > 256) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5534 return 68; /invalid palette size, it is only allowed to be 1-256/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5535 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5536
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5537 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, info->palettesize * 3, "PLTE"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5538
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5539 for(i = 0; i != info->palettesize; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5540 /add all channels except alpha channel/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5541 chunk[j++] = info->palette[i * 4 + 0];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5542 chunk[j++] = info->palette[i * 4 + 1];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5543 chunk[j++] = info->palette[i * 4 + 2];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5544 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5545
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5546 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5547 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5548 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5549
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5550 static unsigned addChunk_tRNS(ucvector* out, const LodePNGColorMode* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5551 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5552
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5553 if(info->colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5554 size_t i, amount = info->palettesize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5555 /the tail of palette values that all have 255 as alpha, does not have to be encoded/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5556 for(i = info->palettesize; i != 0; --i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5557 if(info->palette[4 * (i - 1) + 3] != 255) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5558 --amount;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5559 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5560 if(amount) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5561 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, amount, "tRNS"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5562 /add the alpha channel values from the palette/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5563 for(i = 0; i != amount; ++i) chunk[8 + i] = info->palette[4 * i + 3];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5564 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5565 } else if(info->colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5566 if(info->key_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5567 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 2, "tRNS"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5568 chunk[8] = (unsigned char)(info->key_r >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5569 chunk[9] = (unsigned char)(info->key_r & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5570 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5571 } else if(info->colortype == LCT_RGB) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5572 if(info->key_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5573 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 6, "tRNS"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5574 chunk[8] = (unsigned char)(info->key_r >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5575 chunk[9] = (unsigned char)(info->key_r & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5576 chunk[10] = (unsigned char)(info->key_g >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5577 chunk[11] = (unsigned char)(info->key_g & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5578 chunk[12] = (unsigned char)(info->key_b >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5579 chunk[13] = (unsigned char)(info->key_b & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5580 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5581 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5582
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5583 if(chunk) lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5584 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5585 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5586
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5587 static unsigned addChunk_IDAT(ucvector* out, const unsigned char* data, size_t datasize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5588 LodePNGCompressSettings* zlibsettings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5589 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5590 unsigned char* zlib = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5591 size_t zlibsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5592
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5593 error = zlib_compress(&zlib, &zlibsize, data, datasize, zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5594 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5595 error = lodepng_chunk_createv(out, zlibsize, "IDAT", zlib);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5596 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5597 lodepng_free(zlib);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5598 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5599 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5600
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5601 static unsigned addChunk_IEND(ucvector* out) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5602 return lodepng_chunk_createv(out, 0, "IEND", 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5603 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5604
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5605 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5606
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5607 static unsigned addChunk_tEXt(ucvector* out, const char* keyword, const char* textstring) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5608 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5609 size_t keysize = lodepng_strlen(keyword), textsize = lodepng_strlen(textstring);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5610 size_t size = keysize + 1 + textsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5611 if(keysize < 1 \|\| keysize > 79) return 89; /error: invalid keyword size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5612 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, size, "tEXt"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5613 lodepng_memcpy(chunk + 8, keyword, keysize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5614 chunk[8 + keysize] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5615 lodepng_memcpy(chunk + 9 + keysize, textstring, textsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5616 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5617 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5618 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5619
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5620 static unsigned addChunk_zTXt(ucvector* out, const char* keyword, const char* textstring,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5621 LodePNGCompressSettings* zlibsettings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5622 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5623 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5624 unsigned char* compressed = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5625 size_t compressedsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5626 size_t textsize = lodepng_strlen(textstring);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5627 size_t keysize = lodepng_strlen(keyword);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5628 if(keysize < 1 \|\| keysize > 79) return 89; /error: invalid keyword size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5629
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5630 error = zlib_compress(&compressed, &compressedsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5631 (const unsigned char*)textstring, textsize, zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5632 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5633 size_t size = keysize + 2 + compressedsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5634 error = lodepng_chunk_init(&chunk, out, size, "zTXt");
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5635 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5636 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5637 lodepng_memcpy(chunk + 8, keyword, keysize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5638 chunk[8 + keysize] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5639 chunk[9 + keysize] = 0; /compression method: 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5640 lodepng_memcpy(chunk + 10 + keysize, compressed, compressedsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5641 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5642 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5643
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5644 lodepng_free(compressed);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5645 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5646 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5647
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5648 static unsigned addChunk_iTXt(ucvector* out, unsigned compress, const char* keyword, const char* langtag,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5649 const char* transkey, const char* textstring, LodePNGCompressSettings* zlibsettings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5650 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5651 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5652 unsigned char* compressed = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5653 size_t compressedsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5654 size_t textsize = lodepng_strlen(textstring);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5655 size_t keysize = lodepng_strlen(keyword), langsize = lodepng_strlen(langtag), transsize = lodepng_strlen(transkey);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5656
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5657 if(keysize < 1 \|\| keysize > 79) return 89; /error: invalid keyword size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5658
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5659 if(compress) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5660 error = zlib_compress(&compressed, &compressedsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5661 (const unsigned char*)textstring, textsize, zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5662 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5663 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5664 size_t size = keysize + 3 + langsize + 1 + transsize + 1 + (compress ? compressedsize : textsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5665 error = lodepng_chunk_init(&chunk, out, size, "iTXt");
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5666 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5667 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5668 size_t pos = 8;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5669 lodepng_memcpy(chunk + pos, keyword, keysize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5670 pos += keysize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5671 chunk[pos++] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5672 chunk[pos++] = (compress ? 1 : 0); /compression flag/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5673 chunk[pos++] = 0; /compression method: 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5674 lodepng_memcpy(chunk + pos, langtag, langsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5675 pos += langsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5676 chunk[pos++] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5677 lodepng_memcpy(chunk + pos, transkey, transsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5678 pos += transsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5679 chunk[pos++] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5680 if(compress) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5681 lodepng_memcpy(chunk + pos, compressed, compressedsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5682 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5683 lodepng_memcpy(chunk + pos, textstring, textsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5684 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5685 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5686 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5687
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5688 lodepng_free(compressed);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5689 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5690 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5691
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5692 static unsigned addChunk_bKGD(ucvector* out, const LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5693 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5694 if(info->color.colortype == LCT_GREY \|\| info->color.colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5695 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 2, "bKGD"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5696 chunk[8] = (unsigned char)(info->background_r >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5697 chunk[9] = (unsigned char)(info->background_r & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5698 } else if(info->color.colortype == LCT_RGB \|\| info->color.colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5699 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 6, "bKGD"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5700 chunk[8] = (unsigned char)(info->background_r >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5701 chunk[9] = (unsigned char)(info->background_r & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5702 chunk[10] = (unsigned char)(info->background_g >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5703 chunk[11] = (unsigned char)(info->background_g & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5704 chunk[12] = (unsigned char)(info->background_b >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5705 chunk[13] = (unsigned char)(info->background_b & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5706 } else if(info->color.colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5707 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 1, "bKGD"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5708 chunk[8] = (unsigned char)(info->background_r & 255); /palette index/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5709 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5710 if(chunk) lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5711 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5712 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5713
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5714 static unsigned addChunk_tIME(ucvector* out, const LodePNGTime* time) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5715 unsigned char* chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5716 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 7, "tIME"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5717 chunk[8] = (unsigned char)(time->year >> 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5718 chunk[9] = (unsigned char)(time->year & 255);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5719 chunk[10] = (unsigned char)time->month;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5720 chunk[11] = (unsigned char)time->day;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5721 chunk[12] = (unsigned char)time->hour;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5722 chunk[13] = (unsigned char)time->minute;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5723 chunk[14] = (unsigned char)time->second;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5724 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5725 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5726 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5727
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5728 static unsigned addChunk_pHYs(ucvector* out, const LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5729 unsigned char* chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5730 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 9, "pHYs"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5731 lodepng_set32bitInt(chunk + 8, info->phys_x);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5732 lodepng_set32bitInt(chunk + 12, info->phys_y);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5733 chunk[16] = info->phys_unit;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5734 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5735 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5736 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5737
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5738 static unsigned addChunk_gAMA(ucvector* out, const LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5739 unsigned char* chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5740 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 4, "gAMA"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5741 lodepng_set32bitInt(chunk + 8, info->gama_gamma);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5742 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5743 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5744 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5745
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5746 static unsigned addChunk_cHRM(ucvector* out, const LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5747 unsigned char* chunk;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5748 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 32, "cHRM"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5749 lodepng_set32bitInt(chunk + 8, info->chrm_white_x);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5750 lodepng_set32bitInt(chunk + 12, info->chrm_white_y);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5751 lodepng_set32bitInt(chunk + 16, info->chrm_red_x);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5752 lodepng_set32bitInt(chunk + 20, info->chrm_red_y);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5753 lodepng_set32bitInt(chunk + 24, info->chrm_green_x);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5754 lodepng_set32bitInt(chunk + 28, info->chrm_green_y);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5755 lodepng_set32bitInt(chunk + 32, info->chrm_blue_x);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5756 lodepng_set32bitInt(chunk + 36, info->chrm_blue_y);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5757 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5758 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5759 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5760
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5761 static unsigned addChunk_sRGB(ucvector* out, const LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5762 unsigned char data = info->srgb_intent;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5763 return lodepng_chunk_createv(out, 1, "sRGB", &data);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5764 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5765
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5766 static unsigned addChunk_iCCP(ucvector* out, const LodePNGInfo* info, LodePNGCompressSettings* zlibsettings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5767 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5768 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5769 unsigned char* compressed = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5770 size_t compressedsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5771 size_t keysize = lodepng_strlen(info->iccp_name);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5772
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5773 if(keysize < 1 \|\| keysize > 79) return 89; /error: invalid keyword size/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5774 error = zlib_compress(&compressed, &compressedsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5775 info->iccp_profile, info->iccp_profile_size, zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5776 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5777 size_t size = keysize + 2 + compressedsize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5778 error = lodepng_chunk_init(&chunk, out, size, "iCCP");
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5779 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5780 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5781 lodepng_memcpy(chunk + 8, info->iccp_name, keysize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5782 chunk[8 + keysize] = 0; /null termination char/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5783 chunk[9 + keysize] = 0; /compression method: 0/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5784 lodepng_memcpy(chunk + 10 + keysize, compressed, compressedsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5785 lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5786 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5787
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5788 lodepng_free(compressed);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5789 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5790 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5791
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5792 static unsigned addChunk_sBIT(ucvector* out, const LodePNGInfo* info) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5793 unsigned bitdepth = (info->color.colortype == LCT_PALETTE) ? 8 : info->color.bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5794 unsigned char* chunk = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5795 if(info->color.colortype == LCT_GREY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5796 if(info->sbit_r == 0 \|\| info->sbit_r > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5797 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 1, "sBIT"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5798 chunk[8] = info->sbit_r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5799 } else if(info->color.colortype == LCT_RGB \|\| info->color.colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5800 if(info->sbit_r == 0 \|\| info->sbit_g == 0 \|\| info->sbit_b == 0) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5801 if(info->sbit_r > bitdepth \|\| info->sbit_g > bitdepth \|\| info->sbit_b > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5802 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 3, "sBIT"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5803 chunk[8] = info->sbit_r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5804 chunk[9] = info->sbit_g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5805 chunk[10] = info->sbit_b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5806 } else if(info->color.colortype == LCT_GREY_ALPHA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5807 if(info->sbit_r == 0 \|\| info->sbit_a == 0) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5808 if(info->sbit_r > bitdepth \|\| info->sbit_a > bitdepth) return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5809 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 2, "sBIT"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5810 chunk[8] = info->sbit_r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5811 chunk[9] = info->sbit_a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5812 } else if(info->color.colortype == LCT_RGBA) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5813 if(info->sbit_r == 0 \|\| info->sbit_g == 0 \|\| info->sbit_b == 0 \|\| info->sbit_a == 0 \|\|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5814 info->sbit_r > bitdepth \|\| info->sbit_g > bitdepth \|\|
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5815 info->sbit_b > bitdepth \|\| info->sbit_a > bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5816 return 115;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5817 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5818 CERROR_TRY_RETURN(lodepng_chunk_init(&chunk, out, 4, "sBIT"));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5819 chunk[8] = info->sbit_r;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5820 chunk[9] = info->sbit_g;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5821 chunk[10] = info->sbit_b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5822 chunk[11] = info->sbit_a;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5823 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5824 if(chunk) lodepng_chunk_generate_crc(chunk);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5825 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5826 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5827
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5828 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5829
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5830 static void filterScanline(unsigned char* out, const unsigned char* scanline, const unsigned char* prevline,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5831 size_t length, size_t bytewidth, unsigned char filterType) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5832 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5833 switch(filterType) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5834 case 0: /None/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5835 for(i = 0; i != length; ++i) out[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5836 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5837 case 1: /Sub/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5838 for(i = 0; i != bytewidth; ++i) out[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5839 for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - scanline[i - bytewidth];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5840 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5841 case 2: /Up/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5842 if(prevline) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5843 for(i = 0; i != length; ++i) out[i] = scanline[i] - prevline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5844 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5845 for(i = 0; i != length; ++i) out[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5846 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5847 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5848 case 3: /Average/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5849 if(prevline) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5850 for(i = 0; i != bytewidth; ++i) out[i] = scanline[i] - (prevline[i] >> 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5851 for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - ((scanline[i - bytewidth] + prevline[i]) >> 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5852 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5853 for(i = 0; i != bytewidth; ++i) out[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5854 for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - (scanline[i - bytewidth] >> 1);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5855 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5856 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5857 case 4: /Paeth/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5858 if(prevline) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5859 /paethPredictor(0, prevline[i], 0) is always prevline[i]/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5860 for(i = 0; i != bytewidth; ++i) out[i] = (scanline[i] - prevline[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5861 for(i = bytewidth; i < length; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5862 out[i] = (scanline[i] - paethPredictor(scanline[i - bytewidth], prevline[i], prevline[i - bytewidth]));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5863 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5864 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5865 for(i = 0; i != bytewidth; ++i) out[i] = scanline[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5866 /paethPredictor(scanline[i - bytewidth], 0, 0) is always scanline[i - bytewidth]/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5867 for(i = bytewidth; i < length; ++i) out[i] = (scanline[i] - scanline[i - bytewidth]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5868 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5869 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5870 default: return; /invalid filter type given/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5871 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5872 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5873
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5874 /* integer binary logarithm, max return value is 31 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5875 static size_t ilog2(size_t i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5876 size_t result = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5877 if(i >= 65536) { result += 16; i >>= 16; }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5878 if(i >= 256) { result += 8; i >>= 8; }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5879 if(i >= 16) { result += 4; i >>= 4; }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5880 if(i >= 4) { result += 2; i >>= 2; }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5881 if(i >= 2) { result += 1; /i >>= 1;/ }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5882 return result;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5883 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5884
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5885 /* integer approximation for i * log2(i), helper function for LFS_ENTROPY */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5886 static size_t ilog2i(size_t i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5887 size_t l;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5888 if(i == 0) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5889 l = ilog2(i);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5890 /* approximate i*log2(i): l is integer logarithm, ((i - (1u << l)) << 1u)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5891 linearly approximates the missing fractional part multiplied by i */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5892 return i * l + ((i - (1u << l)) << 1u);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5893 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5894
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5895 static unsigned filter(unsigned char* out, const unsigned char* in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5896 const LodePNGColorMode* color, const LodePNGEncoderSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5897 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5898 For PNG filter method 0
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5899 out must be a buffer with as size: h + (w * h * bpp + 7u) / 8u, because there are
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5900 the scanlines with 1 extra byte per scanline
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5901 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5902
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5903 unsigned bpp = lodepng_get_bpp(color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5904 /the width of a scanline in bytes, not including the filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5905 size_t linebytes = lodepng_get_raw_size_idat(w, 1, bpp) - 1u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5906
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5907 /bytewidth is used for filtering, is 1 when bpp < 8, number of bytes per pixel otherwise/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5908 size_t bytewidth = (bpp + 7u) / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5909 const unsigned char* prevline = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5910 unsigned x, y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5911 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5912 LodePNGFilterStrategy strategy = settings->filter_strategy;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5913
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5914 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5915 There is a heuristic called the minimum sum of absolute differences heuristic, suggested by the PNG standard:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5916 * If the image type is Palette, or the bit depth is smaller than 8, then do not filter the image (i.e.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5917 use fixed filtering, with the filter None).
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5918 * (The other case) If the image type is Grayscale or RGB (with or without Alpha), and the bit depth is
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5919 not smaller than 8, then use adaptive filtering heuristic as follows: independently for each row, apply
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5920 all five filters and select the filter that produces the smallest sum of absolute values per row.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5921 This heuristic is used if filter strategy is LFS_MINSUM and filter_palette_zero is true.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5922
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5923 If filter_palette_zero is true and filter_strategy is not LFS_MINSUM, the above heuristic is followed,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5924 but for "the other case", whatever strategy filter_strategy is set to instead of the minimum sum
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5925 heuristic is used.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5926 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5927 if(settings->filter_palette_zero &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5928 (color->colortype == LCT_PALETTE \|\| color->bitdepth < 8)) strategy = LFS_ZERO;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5929
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5930 if(bpp == 0) return 31; /error: invalid color type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5931
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5932 if(strategy >= LFS_ZERO && strategy <= LFS_FOUR) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5933 unsigned char type = (unsigned char)strategy;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5934 for(y = 0; y != h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5935 size_t outindex = (1 + linebytes) * y; /the extra filterbyte added to each row/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5936 size_t inindex = linebytes * y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5937 out[outindex] = type; /filter type byte/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5938 filterScanline(&out[outindex + 1], &in[inindex], prevline, linebytes, bytewidth, type);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5939 prevline = &in[inindex];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5940 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5941 } else if(strategy == LFS_MINSUM) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5942 /adaptive filtering/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5943 unsigned char* attempt[5]; /five filtering attempts, one for each filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5944 size_t smallest = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5945 unsigned char type, bestType = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5946
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5947 for(type = 0; type != 5; ++type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5948 attempt[type] = (unsigned char*)lodepng_malloc(linebytes);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5949 if(!attempt[type]) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5950 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5951
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5952 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5953 for(y = 0; y != h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5954 /try the 5 filter types/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5955 for(type = 0; type != 5; ++type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5956 size_t sum = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5957 filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5958
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5959 /calculate the sum of the result/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5960 if(type == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5961 for(x = 0; x != linebytes; ++x) sum += (unsigned char)(attempt[type][x]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5962 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5963 for(x = 0; x != linebytes; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5964 /*For differences, each byte should be treated as signed, values above 127 are negative
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5965 (converted to signed char). Filtertype 0 isn't a difference though, so use unsigned there.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5966 This means filtertype 0 is almost never chosen, but that is justified.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5967 unsigned char s = attempt[type][x];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5968 sum += s < 128 ? s : (255U - s);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5969 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5970 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5971
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5972 /check if this is smallest sum (or if type == 0 it's the first case so always store the values)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5973 if(type == 0 \|\| sum < smallest) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5974 bestType = type;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5975 smallest = sum;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5976 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5977 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5978
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5979 prevline = &in[y * linebytes];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5980
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5981 /now fill the out values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5982 out[y * (linebytes + 1)] = bestType; /the first byte of a scanline will be the filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5983 for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5984 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5985 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5986
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5987 for(type = 0; type != 5; ++type) lodepng_free(attempt[type]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5988 } else if(strategy == LFS_ENTROPY) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5989 unsigned char* attempt[5]; /five filtering attempts, one for each filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5990 size_t bestSum = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5991 unsigned type, bestType = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5992 unsigned count[256];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5993
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5994 for(type = 0; type != 5; ++type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5995 attempt[type] = (unsigned char*)lodepng_malloc(linebytes);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5996 if(!attempt[type]) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5997 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5998
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	5999 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6000 for(y = 0; y != h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6001 /try the 5 filter types/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6002 for(type = 0; type != 5; ++type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6003 size_t sum = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6004 filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6005 lodepng_memset(count, 0, 256 * sizeof(*count));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6006 for(x = 0; x != linebytes; ++x) ++count[attempt[type][x]];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6007 ++count[type]; /the filter type itself is part of the scanline/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6008 for(x = 0; x != 256; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6009 sum += ilog2i(count[x]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6010 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6011 /check if this is smallest sum (or if type == 0 it's the first case so always store the values)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6012 if(type == 0 \|\| sum > bestSum) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6013 bestType = type;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6014 bestSum = sum;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6015 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6016 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6017
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6018 prevline = &in[y * linebytes];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6019
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6020 /now fill the out values/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6021 out[y * (linebytes + 1)] = bestType; /the first byte of a scanline will be the filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6022 for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6023 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6024 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6025
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6026 for(type = 0; type != 5; ++type) lodepng_free(attempt[type]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6027 } else if(strategy == LFS_PREDEFINED) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6028 for(y = 0; y != h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6029 size_t outindex = (1 + linebytes) * y; /the extra filterbyte added to each row/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6030 size_t inindex = linebytes * y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6031 unsigned char type = settings->predefined_filters[y];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6032 out[outindex] = type; /filter type byte/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6033 filterScanline(&out[outindex + 1], &in[inindex], prevline, linebytes, bytewidth, type);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6034 prevline = &in[inindex];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6035 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6036 } else if(strategy == LFS_BRUTE_FORCE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6037 /*brute force filter chooser.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6038 deflate the scanline after every filter attempt to see which one deflates best.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6039 This is very slow and gives only slightly smaller, sometimes even larger, result*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6040 size_t size[5];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6041 unsigned char* attempt[5]; /five filtering attempts, one for each filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6042 size_t smallest = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6043 unsigned type = 0, bestType = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6044 unsigned char* dummy;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6045 LodePNGCompressSettings zlibsettings;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6046 lodepng_memcpy(&zlibsettings, &settings->zlibsettings, sizeof(LodePNGCompressSettings));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6047 /*use fixed tree on the attempts so that the tree is not adapted to the filtertype on purpose,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6048 to simulate the true case where the tree is the same for the whole image. Sometimes it gives
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6049 better result with dynamic tree anyway. Using the fixed tree sometimes gives worse, but in rare
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6050 cases better compression. It does make this a bit less slow, so it's worth doing this.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6051 zlibsettings.btype = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6052 /*a custom encoder likely doesn't read the btype setting and is optimized for complete PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6053 images only, so disable it*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6054 zlibsettings.custom_zlib = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6055 zlibsettings.custom_deflate = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6056 for(type = 0; type != 5; ++type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6057 attempt[type] = (unsigned char*)lodepng_malloc(linebytes);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6058 if(!attempt[type]) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6059 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6060 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6061 for(y = 0; y != h; ++y) /try the 5 filter types/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6062 for(type = 0; type != 5; ++type) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6063 unsigned testsize = (unsigned)linebytes;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6064 /if(testsize > 8) testsize /= 8;/ /it already works good enough by testing a part of the row/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6065
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6066 filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6067 size[type] = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6068 dummy = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6069 zlib_compress(&dummy, &size[type], attempt[type], testsize, &zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6070 lodepng_free(dummy);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6071 /check if this is smallest size (or if type == 0 it's the first case so always store the values)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6072 if(type == 0 \|\| size[type] < smallest) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6073 bestType = type;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6074 smallest = size[type];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6075 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6076 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6077 prevline = &in[y * linebytes];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6078 out[y * (linebytes + 1)] = bestType; /the first byte of a scanline will be the filter type/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6079 for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6080 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6081 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6082 for(type = 0; type != 5; ++type) lodepng_free(attempt[type]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6083 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6084 else return 88; /* unknown filter strategy */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6085
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6086 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6087 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6088
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6089 static void addPaddingBits(unsigned char* out, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6090 size_t olinebits, size_t ilinebits, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6091 /*The opposite of the removePaddingBits function
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6092 olinebits must be >= ilinebits*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6093 unsigned y;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6094 size_t diff = olinebits - ilinebits;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6095 size_t obp = 0, ibp = 0; /bit pointers/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6096 for(y = 0; y != h; ++y) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6097 size_t x;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6098 for(x = 0; x < ilinebits; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6099 unsigned char bit = readBitFromReversedStream(&ibp, in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6100 setBitOfReversedStream(&obp, out, bit);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6101 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6102 /*obp += diff; --> no, fill in some value in the padding bits too, to avoid
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6103 "Use of uninitialised value of size ###" warning from valgrind*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6104 for(x = 0; x != diff; ++x) setBitOfReversedStream(&obp, out, 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6105 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6106 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6107
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6108 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6109 in: non-interlaced image with size w*h
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6110 out: the same pixels, but re-ordered according to PNG's Adam7 interlacing, with
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6111 no padding bits between scanlines, but between reduced images so that each
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6112 reduced image starts at a byte.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6113 bpp: bits per pixel
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6114 there are no padding bits, not between scanlines, not between reduced images
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6115 in has the following size in bits: w * h * bpp.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6116 out is possibly bigger due to padding bits between reduced images
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6117 NOTE: comments about padding bits are only relevant if bpp < 8
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6118 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6119 static void Adam7_interlace(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6120 unsigned passw[7], passh[7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6121 size_t filter_passstart[8], padded_passstart[8], passstart[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6122 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6123
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6124 Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6125
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6126 if(bpp >= 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6127 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6128 unsigned x, y, b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6129 size_t bytewidth = bpp / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6130 for(y = 0; y < passh[i]; ++y)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6131 for(x = 0; x < passw[i]; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6132 size_t pixelinstart = ((ADAM7_IY[i] + y * ADAM7_DY[i]) * w + ADAM7_IX[i] + x * ADAM7_DX[i]) * bytewidth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6133 size_t pixeloutstart = passstart[i] + (y * passw[i] + x) * bytewidth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6134 for(b = 0; b < bytewidth; ++b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6135 out[pixeloutstart + b] = in[pixelinstart + b];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6136 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6137 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6138 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6139 } else /bpp < 8: Adam7 with pixels < 8 bit is a bit trickier: with bit pointers/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6140 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6141 unsigned x, y, b;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6142 unsigned ilinebits = bpp * passw[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6143 unsigned olinebits = bpp * w;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6144 size_t obp, ibp; /bit pointers (for out and in buffer)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6145 for(y = 0; y < passh[i]; ++y)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6146 for(x = 0; x < passw[i]; ++x) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6147 ibp = (ADAM7_IY[i] + y * ADAM7_DY[i]) * olinebits + (ADAM7_IX[i] + x * ADAM7_DX[i]) * bpp;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6148 obp = (8 * passstart[i]) + (y * ilinebits + x * bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6149 for(b = 0; b < bpp; ++b) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6150 unsigned char bit = readBitFromReversedStream(&ibp, in);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6151 setBitOfReversedStream(&obp, out, bit);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6152 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6153 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6154 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6155 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6156 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6157
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6158 /*out must be buffer big enough to contain uncompressed IDAT chunk data, and in must contain the full image.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6159 return value is error**/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6160 static unsigned preProcessScanlines(unsigned char** out, size_t* outsize, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6161 unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6162 const LodePNGInfo* info_png, const LodePNGEncoderSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6163 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6164 This function converts the pure 2D image with the PNG's colortype, into filtered-padded-interlaced data. Steps:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6165 *) if no Adam7: 1) add padding bits (= possible extra bits per scanline if bpp < 8) 2) filter
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6166 *) if adam7: 1) Adam7_interlace 2) 7x add padding bits 3) 7x filter
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6167 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6168 unsigned bpp = lodepng_get_bpp(&info_png->color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6169 unsigned error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6170
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6171 if(info_png->interlace_method == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6172 outsize = h + (h ((w * bpp + 7u) / 8u)); /image size plus an extra byte per scanline + possible padding bits/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6173 out = (unsigned char)lodepng_malloc(*outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6174 if(!(out) && (outsize)) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6175
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6176 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6177 /non multiple of 8 bits per scanline, padding bits needed per scanline/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6178 if(bpp < 8 && w * bpp != ((w * bpp + 7u) / 8u) * 8u) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6179 unsigned char* padded = (unsigned char)lodepng_malloc(h ((w * bpp + 7u) / 8u));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6180 if(!padded) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6181 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6182 addPaddingBits(padded, in, ((w * bpp + 7u) / 8u) * 8u, w * bpp, h);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6183 error = filter(*out, padded, w, h, &info_png->color, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6184 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6185 lodepng_free(padded);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6186 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6187 /we can immediately filter into the out buffer, no other steps needed/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6188 error = filter(*out, in, w, h, &info_png->color, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6189 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6190 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6191 } else /interlace_method is 1 (Adam7)/ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6192 unsigned passw[7], passh[7];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6193 size_t filter_passstart[8], padded_passstart[8], passstart[8];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6194 unsigned char* adam7;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6195
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6196 Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6197
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6198 outsize = filter_passstart[7]; /image size plus an extra byte per scanline + possible padding bits*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6199 out = (unsigned char)lodepng_malloc(*outsize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6200 if(!(out)) error = 83; /alloc fail*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6201
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6202 adam7 = (unsigned char*)lodepng_malloc(passstart[7]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6203 if(!adam7 && passstart[7]) error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6204
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6205 if(!error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6206 unsigned i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6207
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6208 Adam7_interlace(adam7, in, w, h, bpp);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6209 for(i = 0; i != 7; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6210 if(bpp < 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6211 unsigned char* padded = (unsigned char*)lodepng_malloc(padded_passstart[i + 1] - padded_passstart[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6212 if(!padded) ERROR_BREAK(83); /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6213 addPaddingBits(padded, &adam7[passstart[i]],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6214 ((passw[i] * bpp + 7u) / 8u) * 8u, passw[i] * bpp, passh[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6215 error = filter(&(*out)[filter_passstart[i]], padded,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6216 passw[i], passh[i], &info_png->color, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6217 lodepng_free(padded);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6218 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6219 error = filter(&(*out)[filter_passstart[i]], &adam7[padded_passstart[i]],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6220 passw[i], passh[i], &info_png->color, settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6221 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6222
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6223 if(error) break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6224 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6225 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6226
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6227 lodepng_free(adam7);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6228 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6229
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6230 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6231 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6232
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6233 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6234 static unsigned addUnknownChunks(ucvector* out, unsigned char* data, size_t datasize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6235 unsigned char* inchunk = data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6236 while((size_t)(inchunk - data) < datasize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6237 CERROR_TRY_RETURN(lodepng_chunk_append(&out->data, &out->size, inchunk));
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6238 out->allocsize = out->size; /fix the allocsize again/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6239 inchunk = lodepng_chunk_next(inchunk, data + datasize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6240 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6241 return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6242 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6243
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6244 static unsigned isGrayICCProfile(const unsigned char* profile, unsigned size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6245 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6246 It is a gray profile if bytes 16-19 are "GRAY", rgb profile if bytes 16-19
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6247 are "RGB ". We do not perform any full parsing of the ICC profile here, other
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6248 than check those 4 bytes to grayscale profile. Other than that, validity of
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6249 the profile is not checked. This is needed only because the PNG specification
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6250 requires using a non-gray color model if there is an ICC profile with "RGB "
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6251 (sadly limiting compression opportunities if the input data is grayscale RGB
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6252 data), and requires using a gray color model if it is "GRAY".
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6253 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6254 if(size < 20) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6255 return profile[16] == 'G' && profile[17] == 'R' && profile[18] == 'A' && profile[19] == 'Y';
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6256 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6257
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6258 static unsigned isRGBICCProfile(const unsigned char* profile, unsigned size) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6259 /* See comment in isGrayICCProfile*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6260 if(size < 20) return 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6261 return profile[16] == 'R' && profile[17] == 'G' && profile[18] == 'B' && profile[19] == ' ';
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6262 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6263 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6264
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6265 unsigned lodepng_encode(unsigned char** out, size_t* outsize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6266 const unsigned char* image, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6267 LodePNGState* state) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6268 unsigned char* data = 0; /uncompressed version of the IDAT chunk data/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6269 size_t datasize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6270 ucvector outv = ucvector_init(NULL, 0);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6271 LodePNGInfo info;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6272 const LodePNGInfo* info_png = &state->info_png;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6273 LodePNGColorMode auto_color;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6274
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6275 lodepng_info_init(&info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6276 lodepng_color_mode_init(&auto_color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6277
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6278 /provide some proper output values if error will happen/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6279 *out = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6280 *outsize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6281 state->error = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6282
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6283 /check input values validity/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6284 if((info_png->color.colortype == LCT_PALETTE \|\| state->encoder.force_palette)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6285 && (info_png->color.palettesize == 0 \|\| info_png->color.palettesize > 256)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6286 /*this error is returned even if auto_convert is enabled and thus encoder could
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6287 generate the palette by itself: while allowing this could be possible in theory,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6288 it may complicate the code or edge cases, and always requiring to give a palette
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6289 when setting this color type is a simpler contract*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6290 state->error = 68; /invalid palette size, it is only allowed to be 1-256/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6291 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6292 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6293 if(state->encoder.zlibsettings.btype > 2) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6294 state->error = 61; /error: invalid btype/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6295 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6296 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6297 if(info_png->interlace_method > 1) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6298 state->error = 71; /error: invalid interlace mode/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6299 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6300 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6301 state->error = checkColorValidity(info_png->color.colortype, info_png->color.bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6302 if(state->error) goto cleanup; /error: invalid color type given/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6303 state->error = checkColorValidity(state->info_raw.colortype, state->info_raw.bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6304 if(state->error) goto cleanup; /error: invalid color type given/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6305
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6306 /* color convert and compute scanline filter types */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6307 lodepng_info_copy(&info, &state->info_png);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6308 if(state->encoder.auto_convert) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6309 LodePNGColorStats stats;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6310 unsigned allow_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6311 lodepng_color_stats_init(&stats);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6312 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6313 if(info_png->iccp_defined &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6314 isGrayICCProfile(info_png->iccp_profile, info_png->iccp_profile_size)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6315 /*the PNG specification does not allow to use palette with a GRAY ICC profile, even
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6316 if the palette has only gray colors, so disallow it.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6317 stats.allow_palette = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6318 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6319 if(info_png->iccp_defined &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6320 isRGBICCProfile(info_png->iccp_profile, info_png->iccp_profile_size)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6321 /the PNG specification does not allow to use grayscale color with RGB ICC profile, so disallow gray./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6322 stats.allow_greyscale = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6323 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6324 #endif /* LODEPNG_COMPILE_ANCILLARY_CHUNKS */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6325 state->error = lodepng_compute_color_stats(&stats, image, w, h, &state->info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6326 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6327 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6328 if(info_png->background_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6329 /the background chunk's color must be taken into account as well/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6330 unsigned r = 0, g = 0, b = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6331 LodePNGColorMode mode16 = lodepng_color_mode_make(LCT_RGB, 16);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6332 lodepng_convert_rgb(&r, &g, &b,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6333 info_png->background_r, info_png->background_g, info_png->background_b, &mode16, &info_png->color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6334 state->error = lodepng_color_stats_add(&stats, r, g, b, 65535);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6335 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6336 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6337 #endif /* LODEPNG_COMPILE_ANCILLARY_CHUNKS */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6338 state->error = auto_choose_color(&auto_color, &state->info_raw, &stats);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6339 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6340 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6341 if(info_png->sbit_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6342 /*if sbit is defined, due to strict requirements of which sbit values can be present for which color modes,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6343 auto_convert can't be done in many cases. However, do support a few cases here.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6344 TODO: more conversions may be possible, and it may also be possible to get a more appropriate color type out of
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6345 auto_choose_color if knowledge about sbit is used beforehand
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6346 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6347 unsigned sbit_max = LODEPNG_MAX(LODEPNG_MAX(LODEPNG_MAX(info_png->sbit_r, info_png->sbit_g),
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6348 info_png->sbit_b), info_png->sbit_a);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6349 unsigned equal = (!info_png->sbit_g \|\| info_png->sbit_g == info_png->sbit_r)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6350 && (!info_png->sbit_b \|\| info_png->sbit_b == info_png->sbit_r)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6351 && (!info_png->sbit_a \|\| info_png->sbit_a == info_png->sbit_r);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6352 allow_convert = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6353 if(info.color.colortype == LCT_PALETTE &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6354 auto_color.colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6355 /* input and output are palette, and in this case it may happen that palette data is
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6356 expected to be copied from info_raw into the info_png */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6357 allow_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6358 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6359 /*going from 8-bit RGB to palette (or 16-bit as long as sbit_max <= 8) is possible
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6360 since both are 8-bit RGB for sBIT's purposes*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6361 if(info.color.colortype == LCT_RGB &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6362 auto_color.colortype == LCT_PALETTE && sbit_max <= 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6363 allow_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6364 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6365 /going from 8-bit RGBA to palette is also ok but only if sbit_a is exactly 8/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6366 if(info.color.colortype == LCT_RGBA && auto_color.colortype == LCT_PALETTE &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6367 info_png->sbit_a == 8 && sbit_max <= 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6368 allow_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6369 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6370 /going from 16-bit RGB(A) to 8-bit RGB(A) is ok if all sbit values are <= 8/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6371 if((info.color.colortype == LCT_RGB \|\| info.color.colortype == LCT_RGBA) && info.color.bitdepth == 16 &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6372 auto_color.colortype == info.color.colortype && auto_color.bitdepth == 8 &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6373 sbit_max <= 8) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6374 allow_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6375 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6376 /*going to less channels is ok if all bit values are equal (all possible values in sbit,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6377 as well as the chosen bitdepth of the result). Due to how auto_convert works,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6378 we already know that auto_color.colortype has less than or equal amount of channels than
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6379 info.colortype. Palette is not used here. This conversion is not allowed if
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6380 info_png->sbit_r < auto_color.bitdepth, because specifically for alpha, non-presence of
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6381 an sbit value heavily implies that alpha's bit depth is equal to the PNG bit depth (rather
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6382 than the bit depths set in the r, g and b sbit values, by how the PNG specification describes
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6383 handling tRNS chunk case with sBIT), so be conservative here about ignoring user input.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6384 if(info.color.colortype != LCT_PALETTE && auto_color.colortype != LCT_PALETTE &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6385 equal && info_png->sbit_r == auto_color.bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6386 allow_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6387 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6388 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6389 #endif
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6390 if(state->encoder.force_palette) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6391 if(info.color.colortype != LCT_GREY && info.color.colortype != LCT_GREY_ALPHA &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6392 (auto_color.colortype == LCT_GREY \|\| auto_color.colortype == LCT_GREY_ALPHA)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6393 /*user speficially forced a PLTE palette, so cannot convert to grayscale types because
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6394 the PNG specification only allows writing a suggested palette in PLTE for truecolor types*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6395 allow_convert = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6396 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6397 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6398 if(allow_convert) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6399 lodepng_color_mode_copy(&info.color, &auto_color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6400 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6401 /also convert the background chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6402 if(info_png->background_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6403 if(lodepng_convert_rgb(&info.background_r, &info.background_g, &info.background_b,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6404 info_png->background_r, info_png->background_g, info_png->background_b, &info.color, &info_png->color)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6405 state->error = 104;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6406 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6407 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6408 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6409 #endif /* LODEPNG_COMPILE_ANCILLARY_CHUNKS */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6410 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6411 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6412 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6413 if(info_png->iccp_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6414 unsigned gray_icc = isGrayICCProfile(info_png->iccp_profile, info_png->iccp_profile_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6415 unsigned rgb_icc = isRGBICCProfile(info_png->iccp_profile, info_png->iccp_profile_size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6416 unsigned gray_png = info.color.colortype == LCT_GREY \|\| info.color.colortype == LCT_GREY_ALPHA;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6417 if(!gray_icc && !rgb_icc) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6418 state->error = 100; /* Disallowed profile color type for PNG */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6419 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6420 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6421 if(gray_icc != gray_png) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6422 /*Not allowed to use RGB/RGBA/palette with GRAY ICC profile or vice versa,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6423 or in case of auto_convert, it wasn't possible to find appropriate model*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6424 state->error = state->encoder.auto_convert ? 102 : 101;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6425 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6426 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6427 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6428 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6429 if(!lodepng_color_mode_equal(&state->info_raw, &info.color)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6430 unsigned char* converted;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6431 size_t size = ((size_t)w * (size_t)h * (size_t)lodepng_get_bpp(&info.color) + 7u) / 8u;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6432
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6433 converted = (unsigned char*)lodepng_malloc(size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6434 if(!converted && size) state->error = 83; /alloc fail/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6435 if(!state->error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6436 state->error = lodepng_convert(converted, image, &info.color, &state->info_raw, w, h);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6437 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6438 if(!state->error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6439 state->error = preProcessScanlines(&data, &datasize, converted, w, h, &info, &state->encoder);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6440 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6441 lodepng_free(converted);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6442 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6443 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6444 state->error = preProcessScanlines(&data, &datasize, image, w, h, &info, &state->encoder);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6445 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6446 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6447
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6448 /* output all PNG chunks */ {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6449 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6450 size_t i;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6451 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6452 /write signature and chunks/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6453 state->error = writeSignature(&outv);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6454 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6455 /IHDR/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6456 state->error = addChunk_IHDR(&outv, w, h, info.color.colortype, info.color.bitdepth, info.interlace_method);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6457 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6458 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6459 /unknown chunks between IHDR and PLTE/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6460 if(info.unknown_chunks_data[0]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6461 state->error = addUnknownChunks(&outv, info.unknown_chunks_data[0], info.unknown_chunks_size[0]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6462 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6463 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6464 /color profile chunks must come before PLTE /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6465 if(info.iccp_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6466 state->error = addChunk_iCCP(&outv, &info, &state->encoder.zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6467 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6468 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6469 if(info.srgb_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6470 state->error = addChunk_sRGB(&outv, &info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6471 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6472 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6473 if(info.gama_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6474 state->error = addChunk_gAMA(&outv, &info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6475 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6476 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6477 if(info.chrm_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6478 state->error = addChunk_cHRM(&outv, &info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6479 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6480 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6481 if(info_png->sbit_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6482 state->error = addChunk_sBIT(&outv, &info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6483 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6484 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6485 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6486 /PLTE/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6487 if(info.color.colortype == LCT_PALETTE) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6488 state->error = addChunk_PLTE(&outv, &info.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6489 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6490 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6491 if(state->encoder.force_palette && (info.color.colortype == LCT_RGB \|\| info.color.colortype == LCT_RGBA)) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6492 /force_palette means: write suggested palette for truecolor in PLTE chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6493 state->error = addChunk_PLTE(&outv, &info.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6494 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6495 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6496 /tRNS (this will only add if when necessary) /
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6497 state->error = addChunk_tRNS(&outv, &info.color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6498 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6499 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6500 /bKGD (must come between PLTE and the IDAt chunks/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6501 if(info.background_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6502 state->error = addChunk_bKGD(&outv, &info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6503 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6504 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6505 /pHYs (must come before the IDAT chunks)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6506 if(info.phys_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6507 state->error = addChunk_pHYs(&outv, &info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6508 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6509 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6510
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6511 /unknown chunks between PLTE and IDAT/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6512 if(info.unknown_chunks_data[1]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6513 state->error = addUnknownChunks(&outv, info.unknown_chunks_data[1], info.unknown_chunks_size[1]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6514 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6515 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6516 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6517 /IDAT (multiple IDAT chunks must be consecutive)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6518 state->error = addChunk_IDAT(&outv, data, datasize, &state->encoder.zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6519 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6520 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6521 /tIME/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6522 if(info.time_defined) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6523 state->error = addChunk_tIME(&outv, &info.time);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6524 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6525 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6526 /tEXt and/or zTXt/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6527 for(i = 0; i != info.text_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6528 if(lodepng_strlen(info.text_keys[i]) > 79) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6529 state->error = 66; /text chunk too large/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6530 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6531 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6532 if(lodepng_strlen(info.text_keys[i]) < 1) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6533 state->error = 67; /text chunk too small/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6534 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6535 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6536 if(state->encoder.text_compression) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6537 state->error = addChunk_zTXt(&outv, info.text_keys[i], info.text_strings[i], &state->encoder.zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6538 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6539 } else {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6540 state->error = addChunk_tEXt(&outv, info.text_keys[i], info.text_strings[i]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6541 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6542 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6543 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6544 /LodePNG version id in text chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6545 if(state->encoder.add_id) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6546 unsigned already_added_id_text = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6547 for(i = 0; i != info.text_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6548 const char* k = info.text_keys[i];
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6549 /* Could use strcmp, but we're not calling or reimplementing this C library function for this use only */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6550 if(k[0] == 'L' && k[1] == 'o' && k[2] == 'd' && k[3] == 'e' &&
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6551 k[4] == 'P' && k[5] == 'N' && k[6] == 'G' && k[7] == '\0') {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6552 already_added_id_text = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6553 break;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6554 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6555 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6556 if(already_added_id_text == 0) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6557 state->error = addChunk_tEXt(&outv, "LodePNG", LODEPNG_VERSION_STRING); /it's shorter as tEXt than as zTXt chunk/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6558 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6559 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6560 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6561 /iTXt/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6562 for(i = 0; i != info.itext_num; ++i) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6563 if(lodepng_strlen(info.itext_keys[i]) > 79) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6564 state->error = 66; /text chunk too large/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6565 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6566 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6567 if(lodepng_strlen(info.itext_keys[i]) < 1) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6568 state->error = 67; /text chunk too small/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6569 goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6570 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6571 state->error = addChunk_iTXt(
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6572 &outv, state->encoder.text_compression,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6573 info.itext_keys[i], info.itext_langtags[i], info.itext_transkeys[i], info.itext_strings[i],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6574 &state->encoder.zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6575 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6576 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6577
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6578 /unknown chunks between IDAT and IEND/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6579 if(info.unknown_chunks_data[2]) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6580 state->error = addUnknownChunks(&outv, info.unknown_chunks_data[2], info.unknown_chunks_size[2]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6581 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6582 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6583 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6584 state->error = addChunk_IEND(&outv);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6585 if(state->error) goto cleanup;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6586 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6587
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6588 cleanup:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6589 lodepng_info_cleanup(&info);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6590 lodepng_free(data);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6591 lodepng_color_mode_cleanup(&auto_color);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6592
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6593 /instead of cleaning the vector up, give it to the output/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6594 *out = outv.data;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6595 *outsize = outv.size;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6596
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6597 return state->error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6598 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6599
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6600 unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize, const unsigned char* image,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6601 unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6602 unsigned error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6603 LodePNGState state;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6604 lodepng_state_init(&state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6605 state.info_raw.colortype = colortype;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6606 state.info_raw.bitdepth = bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6607 state.info_png.color.colortype = colortype;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6608 state.info_png.color.bitdepth = bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6609 lodepng_encode(out, outsize, image, w, h, &state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6610 error = state.error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6611 lodepng_state_cleanup(&state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6612 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6613 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6614
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6615 unsigned lodepng_encode32(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6616 return lodepng_encode_memory(out, outsize, image, w, h, LCT_RGBA, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6617 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6618
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6619 unsigned lodepng_encode24(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6620 return lodepng_encode_memory(out, outsize, image, w, h, LCT_RGB, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6621 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6622
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6623 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6624 unsigned lodepng_encode_file(const char* filename, const unsigned char* image, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6625 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6626 unsigned char* buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6627 size_t buffersize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6628 unsigned error = lodepng_encode_memory(&buffer, &buffersize, image, w, h, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6629 if(!error) error = lodepng_save_file(buffer, buffersize, filename);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6630 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6631 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6632 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6633
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6634 unsigned lodepng_encode32_file(const char* filename, const unsigned char* image, unsigned w, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6635 return lodepng_encode_file(filename, image, w, h, LCT_RGBA, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6636 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6637
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6638 unsigned lodepng_encode24_file(const char* filename, const unsigned char* image, unsigned w, unsigned h) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6639 return lodepng_encode_file(filename, image, w, h, LCT_RGB, 8);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6640 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6641 #endif /LODEPNG_COMPILE_DISK/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6642
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6643 void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6644 lodepng_compress_settings_init(&settings->zlibsettings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6645 settings->filter_palette_zero = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6646 settings->filter_strategy = LFS_MINSUM;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6647 settings->auto_convert = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6648 settings->force_palette = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6649 settings->predefined_filters = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6650 #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6651 settings->add_id = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6652 settings->text_compression = 1;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6653 #endif /LODEPNG_COMPILE_ANCILLARY_CHUNKS/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6654 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6655
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6656 #endif /LODEPNG_COMPILE_ENCODER/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6657 #endif /LODEPNG_COMPILE_PNG/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6658
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6659 #ifdef LODEPNG_COMPILE_ERROR_TEXT
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6660 /*
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6661 This returns the description of a numerical error code in English. This is also
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6662 the documentation of all the error codes.
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6663 */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6664 const char* lodepng_error_text(unsigned code) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6665 switch(code) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6666 case 0: return "no error, everything went ok";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6667 case 1: return "nothing done yet"; /the Encoder/Decoder has done nothing yet, error checking makes no sense yet/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6668 case 10: return "end of input memory reached without huffman end code"; /while huffman decoding/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6669 case 11: return "error in code tree made it jump outside of huffman tree"; /while huffman decoding/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6670 case 13: return "problem while processing dynamic deflate block";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6671 case 14: return "problem while processing dynamic deflate block";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6672 case 15: return "problem while processing dynamic deflate block";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6673 /this error could happen if there are only 0 or 1 symbols present in the huffman code:/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6674 case 16: return "invalid code while processing dynamic deflate block";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6675 case 17: return "end of out buffer memory reached while inflating";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6676 case 18: return "invalid distance code while inflating";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6677 case 19: return "end of out buffer memory reached while inflating";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6678 case 20: return "invalid deflate block BTYPE encountered while decoding";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6679 case 21: return "NLEN is not ones complement of LEN in a deflate block";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6680
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6681 /*end of out buffer memory reached while inflating:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6682 This can happen if the inflated deflate data is longer than the amount of bytes required to fill up
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6683 all the pixels of the image, given the color depth and image dimensions. Something that doesn't
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6684 happen in a normal, well encoded, PNG image.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6685 case 22: return "end of out buffer memory reached while inflating";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6686 case 23: return "end of in buffer memory reached while inflating";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6687 case 24: return "invalid FCHECK in zlib header";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6688 case 25: return "invalid compression method in zlib header";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6689 case 26: return "FDICT encountered in zlib header while it's not used for PNG";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6690 case 27: return "PNG file is smaller than a PNG header";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6691 /Checks the magic file header, the first 8 bytes of the PNG file/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6692 case 28: return "incorrect PNG signature, it's no PNG or corrupted";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6693 case 29: return "first chunk is not the header chunk";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6694 case 30: return "chunk length too large, chunk broken off at end of file";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6695 case 31: return "illegal PNG color type or bpp";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6696 case 32: return "illegal PNG compression method";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6697 case 33: return "illegal PNG filter method";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6698 case 34: return "illegal PNG interlace method";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6699 case 35: return "chunk length of a chunk is too large or the chunk too small";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6700 case 36: return "illegal PNG filter type encountered";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6701 case 37: return "illegal bit depth for this color type given";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6702 case 38: return "the palette is too small or too big"; /0, or more than 256 colors/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6703 case 39: return "tRNS chunk before PLTE or has more entries than palette size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6704 case 40: return "tRNS chunk has wrong size for grayscale image";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6705 case 41: return "tRNS chunk has wrong size for RGB image";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6706 case 42: return "tRNS chunk appeared while it was not allowed for this color type";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6707 case 43: return "bKGD chunk has wrong size for palette image";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6708 case 44: return "bKGD chunk has wrong size for grayscale image";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6709 case 45: return "bKGD chunk has wrong size for RGB image";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6710 case 48: return "empty input buffer given to decoder. Maybe caused by non-existing file?";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6711 case 49: return "jumped past memory while generating dynamic huffman tree";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6712 case 50: return "jumped past memory while generating dynamic huffman tree";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6713 case 51: return "jumped past memory while inflating huffman block";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6714 case 52: return "jumped past memory while inflating";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6715 case 53: return "size of zlib data too small";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6716 case 54: return "repeat symbol in tree while there was no value symbol yet";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6717 /*jumped past tree while generating huffman tree, this could be when the
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6718 tree will have more leaves than symbols after generating it out of the
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6719 given lengths. They call this an oversubscribed dynamic bit lengths tree in zlib.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6720 case 55: return "jumped past tree while generating huffman tree";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6721 case 56: return "given output image colortype or bitdepth not supported for color conversion";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6722 case 57: return "invalid CRC encountered (checking CRC can be disabled)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6723 case 58: return "invalid ADLER32 encountered (checking ADLER32 can be disabled)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6724 case 59: return "requested color conversion not supported";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6725 case 60: return "invalid window size given in the settings of the encoder (must be 0-32768)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6726 case 61: return "invalid BTYPE given in the settings of the encoder (only 0, 1 and 2 are allowed)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6727 /LodePNG leaves the choice of RGB to grayscale conversion formula to the user./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6728 case 62: return "conversion from color to grayscale not supported";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6729 /(2^31-1)/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6730 case 63: return "length of a chunk too long, max allowed for PNG is 2147483647 bytes per chunk";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6731 /this would result in the inability of a deflated block to ever contain an end code. It must be at least 1./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6732 case 64: return "the length of the END symbol 256 in the Huffman tree is 0";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6733 case 66: return "the length of a text chunk keyword given to the encoder is longer than the maximum of 79 bytes";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6734 case 67: return "the length of a text chunk keyword given to the encoder is smaller than the minimum of 1 byte";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6735 case 68: return "tried to encode a PLTE chunk with a palette that has less than 1 or more than 256 colors";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6736 case 69: return "unknown chunk type with 'critical' flag encountered by the decoder";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6737 case 71: return "invalid interlace mode given to encoder (must be 0 or 1)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6738 case 72: return "while decoding, invalid compression method encountering in zTXt or iTXt chunk (it must be 0)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6739 case 73: return "invalid tIME chunk size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6740 case 74: return "invalid pHYs chunk size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6741 /length could be wrong, or data chopped off/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6742 case 75: return "no null termination char found while decoding text chunk";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6743 case 76: return "iTXt chunk too short to contain required bytes";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6744 case 77: return "integer overflow in buffer size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6745 case 78: return "failed to open file for reading"; /file doesn't exist or couldn't be opened for reading/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6746 case 79: return "failed to open file for writing";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6747 case 80: return "tried creating a tree of 0 symbols";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6748 case 81: return "lazy matching at pos 0 is impossible";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6749 case 82: return "color conversion to palette requested while a color isn't in palette, or index out of bounds";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6750 case 83: return "memory allocation failed";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6751 case 84: return "given image too small to contain all pixels to be encoded";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6752 case 86: return "impossible offset in lz77 encoding (internal bug)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6753 case 87: return "must provide custom zlib function pointer if LODEPNG_COMPILE_ZLIB is not defined";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6754 case 88: return "invalid filter strategy given for LodePNGEncoderSettings.filter_strategy";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6755 case 89: return "text chunk keyword too short or long: must have size 1-79";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6756 /the windowsize in the LodePNGCompressSettings. Requiring POT(==> & instead of %) makes encoding 12% faster./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6757 case 90: return "windowsize must be a power of two";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6758 case 91: return "invalid decompressed idat size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6759 case 92: return "integer overflow due to too many pixels";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6760 case 93: return "zero width or height is invalid";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6761 case 94: return "header chunk must have a size of 13 bytes";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6762 case 95: return "integer overflow with combined idat chunk size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6763 case 96: return "invalid gAMA chunk size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6764 case 97: return "invalid cHRM chunk size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6765 case 98: return "invalid sRGB chunk size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6766 case 99: return "invalid sRGB rendering intent";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6767 case 100: return "invalid ICC profile color type, the PNG specification only allows RGB or GRAY";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6768 case 101: return "PNG specification does not allow RGB ICC profile on gray color types and vice versa";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6769 case 102: return "not allowed to set grayscale ICC profile with colored pixels by PNG specification";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6770 case 103: return "invalid palette index in bKGD chunk. Maybe it came before PLTE chunk?";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6771 case 104: return "invalid bKGD color while encoding (e.g. palette index out of range)";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6772 case 105: return "integer overflow of bitsize";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6773 case 106: return "PNG file must have PLTE chunk if color type is palette";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6774 case 107: return "color convert from palette mode requested without setting the palette data in it";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6775 case 108: return "tried to add more than 256 values to a palette";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6776 /this limit can be configured in LodePNGDecompressSettings/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6777 case 109: return "tried to decompress zlib or deflate data larger than desired max_output_size";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6778 case 110: return "custom zlib or inflate decompression failed";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6779 case 111: return "custom zlib or deflate compression failed";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6780 /*max text size limit can be configured in LodePNGDecoderSettings. This error prevents
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6781 unreasonable memory consumption when decoding due to impossibly large text sizes.*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6782 case 112: return "compressed text unreasonably large";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6783 /*max ICC size limit can be configured in LodePNGDecoderSettings. This error prevents
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6784 unreasonable memory consumption when decoding due to impossibly large ICC profile*/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6785 case 113: return "ICC profile unreasonably large";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6786 case 114: return "sBIT chunk has wrong size for the color type of the image";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6787 case 115: return "sBIT value out of range";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6788 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6789 return "unknown error code";
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6790 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6791 #endif /LODEPNG_COMPILE_ERROR_TEXT/
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6792
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6793 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6794 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6795 /* // C++ Wrapper // */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6796 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6797 /* ////////////////////////////////////////////////////////////////////////// */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6798
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6799 #ifdef LODEPNG_COMPILE_CPP
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6800 namespace lodepng {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6801
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6802 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6803 unsigned load_file(std::vector<unsigned char>& buffer, const std::string& filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6804 long size = lodepng_filesize(filename.c_str());
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6805 if(size < 0) return 78;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6806 buffer.resize((size_t)size);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6807 return size == 0 ? 0 : lodepng_buffer_file(&buffer[0], (size_t)size, filename.c_str());
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6808 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6809
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6810 /write given buffer to the file, overwriting the file, it doesn't append to it./
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6811 unsigned save_file(const std::vector<unsigned char>& buffer, const std::string& filename) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6812 return lodepng_save_file(buffer.empty() ? 0 : &buffer[0], buffer.size(), filename.c_str());
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6813 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6814 #endif /* LODEPNG_COMPILE_DISK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6815
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6816 #ifdef LODEPNG_COMPILE_ZLIB
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6817 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6818 unsigned decompress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6819 const LodePNGDecompressSettings& settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6820 unsigned char* buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6821 size_t buffersize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6822 unsigned error = zlib_decompress(&buffer, &buffersize, 0, in, insize, &settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6823 if(buffer) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6824 out.insert(out.end(), buffer, &buffer[buffersize]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6825 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6826 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6827 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6828 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6829
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6830 unsigned decompress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6831 const LodePNGDecompressSettings& settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6832 return decompress(out, in.empty() ? 0 : &in[0], in.size(), settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6833 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6834 #endif /* LODEPNG_COMPILE_DECODER */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6835
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6836 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6837 unsigned compress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6838 const LodePNGCompressSettings& settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6839 unsigned char* buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6840 size_t buffersize = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6841 unsigned error = zlib_compress(&buffer, &buffersize, in, insize, &settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6842 if(buffer) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6843 out.insert(out.end(), buffer, &buffer[buffersize]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6844 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6845 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6846 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6847 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6848
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6849 unsigned compress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6850 const LodePNGCompressSettings& settings) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6851 return compress(out, in.empty() ? 0 : &in[0], in.size(), settings);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6852 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6853 #endif /* LODEPNG_COMPILE_ENCODER */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6854 #endif /* LODEPNG_COMPILE_ZLIB */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6855
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6856
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6857 #ifdef LODEPNG_COMPILE_PNG
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6858
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6859 State::State() {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6860 lodepng_state_init(this);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6861 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6862
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6863 State::State(const State& other) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6864 lodepng_state_init(this);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6865 lodepng_state_copy(this, &other);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6866 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6867
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6868 State::~State() {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6869 lodepng_state_cleanup(this);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6870 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6871
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6872 State& State::operator=(const State& other) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6873 lodepng_state_copy(this, &other);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6874 return *this;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6875 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6876
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6877 #ifdef LODEPNG_COMPILE_DECODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6878
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6879 unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const unsigned char* in,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6880 size_t insize, LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6881 unsigned char* buffer = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6882 unsigned error = lodepng_decode_memory(&buffer, &w, &h, in, insize, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6883 if(buffer && !error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6884 State state;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6885 state.info_raw.colortype = colortype;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6886 state.info_raw.bitdepth = bitdepth;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6887 size_t buffersize = lodepng_get_raw_size(w, h, &state.info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6888 out.insert(out.end(), buffer, &buffer[buffersize]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6889 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6890 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6891 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6892 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6893
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6894 unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6895 const std::vector<unsigned char>& in, LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6896 return decode(out, w, h, in.empty() ? 0 : &in[0], (unsigned)in.size(), colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6897 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6898
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6899 unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6900 State& state,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6901 const unsigned char* in, size_t insize) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6902 unsigned char* buffer = NULL;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6903 unsigned error = lodepng_decode(&buffer, &w, &h, &state, in, insize);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6904 if(buffer && !error) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6905 size_t buffersize = lodepng_get_raw_size(w, h, &state.info_raw);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6906 out.insert(out.end(), buffer, &buffer[buffersize]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6907 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6908 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6909 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6910 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6911
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6912 unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6913 State& state,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6914 const std::vector<unsigned char>& in) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6915 return decode(out, w, h, state, in.empty() ? 0 : &in[0], in.size());
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6916 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6917
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6918 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6919 unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const std::string& filename,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6920 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6921 std::vector<unsigned char> buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6922 /* safe output values in case error happens */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6923 w = h = 0;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6924 unsigned error = load_file(buffer, filename);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6925 if(error) return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6926 return decode(out, w, h, buffer, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6927 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6928 #endif /* LODEPNG_COMPILE_DECODER */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6929 #endif /* LODEPNG_COMPILE_DISK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6930
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6931 #ifdef LODEPNG_COMPILE_ENCODER
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6932 unsigned encode(std::vector<unsigned char>& out, const unsigned char* in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6933 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6934 unsigned char* buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6935 size_t buffersize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6936 unsigned error = lodepng_encode_memory(&buffer, &buffersize, in, w, h, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6937 if(buffer) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6938 out.insert(out.end(), buffer, &buffer[buffersize]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6939 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6940 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6941 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6942 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6943
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6944 unsigned encode(std::vector<unsigned char>& out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6945 const std::vector<unsigned char>& in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6946 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6947 if(lodepng_get_raw_size_lct(w, h, colortype, bitdepth) > in.size()) return 84;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6948 return encode(out, in.empty() ? 0 : &in[0], w, h, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6949 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6950
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6951 unsigned encode(std::vector<unsigned char>& out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6952 const unsigned char* in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6953 State& state) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6954 unsigned char* buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6955 size_t buffersize;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6956 unsigned error = lodepng_encode(&buffer, &buffersize, in, w, h, &state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6957 if(buffer) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6958 out.insert(out.end(), buffer, &buffer[buffersize]);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6959 lodepng_free(buffer);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6960 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6961 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6962 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6963
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6964 unsigned encode(std::vector<unsigned char>& out,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6965 const std::vector<unsigned char>& in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6966 State& state) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6967 if(lodepng_get_raw_size(w, h, &state.info_raw) > in.size()) return 84;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6968 return encode(out, in.empty() ? 0 : &in[0], w, h, state);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6969 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6970
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6971 #ifdef LODEPNG_COMPILE_DISK
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6972 unsigned encode(const std::string& filename,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6973 const unsigned char* in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6974 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6975 std::vector<unsigned char> buffer;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6976 unsigned error = encode(buffer, in, w, h, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6977 if(!error) error = save_file(buffer, filename);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6978 return error;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6979 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6980
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6981 unsigned encode(const std::string& filename,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6982 const std::vector<unsigned char>& in, unsigned w, unsigned h,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6983 LodePNGColorType colortype, unsigned bitdepth) {
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6984 if(lodepng_get_raw_size_lct(w, h, colortype, bitdepth) > in.size()) return 84;
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6985 return encode(filename, in.empty() ? 0 : &in[0], w, h, colortype, bitdepth);
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6986 }
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6987 #endif /* LODEPNG_COMPILE_DISK */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6988 #endif /* LODEPNG_COMPILE_ENCODER */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6989 #endif /* LODEPNG_COMPILE_PNG */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6990 } /* namespace lodepng */
44ec744fbedc did: package restructuring according to nimble recommendation for libraries Sam <sam@basx.dev> parents: diff changeset	6991 #endif /LODEPNG_COMPILE_CPP/

Mercurial > games > semicongine

annotate semiconginev2/old/resources/lodepng.c @ 1234:841e12f33c47