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comparison src/zamikongine/glslang/glslang.nim @ 19:b55d6ecde79d

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did: introduce scene graph, meshs and generic vertex buffers
author Sam <sam@basx.dev>
date Mon, 09 Jan 2023 11:04:19 +0700
parents src/glslang/glslang.nim@bb2a7d3a7003
children
comparison
equal deleted inserted replaced
18:90e117952f74 19:b55d6ecde79d
1 import glslang_c_interface
2 import glslang_c_shader_types
3
4 export
5 glslang_stage_t,
6 glslang_initialize_process,
7 glslang_finalize_process
8
9 type
10 ShaderVersion = enum
11 ES_VERSION = 100
12 DESKTOP_VERSION = 110
13
14 proc compileGLSLToSPIRV*(stage: glslang_stage_t, shaderSource: string, fileName: string): seq[uint32] =
15 var input = glslang_input_t(
16 stage: stage,
17 language: GLSLANG_SOURCE_GLSL,
18 client: GLSLANG_CLIENT_VULKAN,
19 client_version: GLSLANG_TARGET_VULKAN_1_2,
20 target_language: GLSLANG_TARGET_SPV,
21 target_language_version: GLSLANG_TARGET_SPV_1_5,
22 code: cstring(shaderSource),
23 default_version: ord(DESKTOP_VERSION),
24 default_profile: GLSLANG_CORE_PROFILE,
25 force_default_version_and_profile: false.cint,
26 forward_compatible: false.cint,
27 messages: GLSLANG_MSG_DEBUG_INFO_BIT,
28 resource: glslang_default_resource(),
29 )
30
31 var shader = glslang_shader_create(addr(input))
32
33 if not bool(glslang_shader_preprocess(shader, addr(input))):
34 echo "GLSL preprocessing failed " & fileName
35 echo glslang_shader_get_info_log(shader)
36 echo glslang_shader_get_info_debug_log(shader)
37 echo input.code
38 glslang_shader_delete(shader)
39 return
40
41 if not bool(glslang_shader_parse(shader, addr(input))):
42 echo "GLSL parsing failed " & fileName
43 echo glslang_shader_get_info_log(shader)
44 echo glslang_shader_get_info_debug_log(shader)
45 echo glslang_shader_get_preprocessed_code(shader)
46 glslang_shader_delete(shader)
47 return
48
49 var program: ptr glslang_program_t = glslang_program_create()
50 glslang_program_add_shader(program, shader)
51
52 if not bool(glslang_program_link(program, ord(GLSLANG_MSG_SPV_RULES_BIT) or ord(GLSLANG_MSG_VULKAN_RULES_BIT))):
53 echo "GLSL linking failed " & fileName
54 echo glslang_program_get_info_log(program)
55 echo glslang_program_get_info_debug_log(program)
56 glslang_program_delete(program)
57 glslang_shader_delete(shader)
58 return
59
60 glslang_program_SPIRV_generate(program, stage)
61
62 result = newSeq[uint32](glslang_program_SPIRV_get_size(program))
63 glslang_program_SPIRV_get(program, addr(result[0]))
64
65 var spirv_messages: cstring = glslang_program_SPIRV_get_messages(program)
66 if spirv_messages != nil:
67 echo "(%s) %s\b", fileName, spirv_messages
68
69 glslang_program_delete(program)
70 glslang_shader_delete(shader)
71
72 template checkGlslangResult*(call: untyped) =
73 let value = call
74 if value != 1:
75 raise newException(Exception, "glgslang error: " & astToStr(call) & " returned " & $value)