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annotate svk/generate.nim @ 1480:0b302531f5c5

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did: continue on vulkan nim api generator
author sam <sam@basx.dev>
date Mon, 21 Apr 2025 01:31:55 +0700
parents 172ac338f820
children a99f3227130c
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1 import std/strtabs
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2 import std/syncio
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3 import std/xmltree
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4 import std/tables
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5 import std/options
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6 import std/sequtils
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7 import std/strutils
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8 import std/strformat
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9 import std/xmlparser
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10 import std/os
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11 import std/osproc
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12 import std/paths
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13
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14 # helpers
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15 func smartParseInt(value: string): int =
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16 if value.startsWith("0x"):
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17 parseHexInt(value)
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18 else:
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19 parseInt(value)
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20
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21 const TYPEMAP = {
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22 "void": "void",
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23 "char": "char",
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24 "float": "float32",
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25 "double": "float64",
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26 "int8_t": "int8",
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27 "uint8_t": "uint8",
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28 "int16_t": "int16",
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29 "uint16_t": "uint16",
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30 "int32_t": "int32",
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31 "uint32_t": "uint32",
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32 "uint64_t": "uint64",
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33 "int64_t": "int64",
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34 "size_t": "csize_t",
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35 "int": "cint",
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36 "void*": "pointer",
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37 "char*": "cstring",
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38 "ptr char": "cstring",
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39 "ptr void": "pointer",
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40 # "VK_DEFINE_HANDLE": "VkHandle", # not required, can directly defined as a distinct pointer, (in C is a pointer to an empty struct type)
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41 # "VK_DEFINE_NON_DISPATCHABLE_HANDLE": "VkNonDispatchableHandle", # same here
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42 }.toTable
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43
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44 # load xml
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45 let xml = (system.currentSourcePath.parentDir() / "vk.xml").loadXml()
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46 let platforms = xml.findAll("platforms")[0]
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47 let types = xml.findAll("types")[0]
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48 let xmlenums = xml.findAll("enums")
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49 let commands = xml.findAll("commands")[0]
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50 let features = xml.findAll("feature") # features has extends="<ENUM>"
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51 let extensions = xml.findAll("extensions")[0] # extensions has extends="<ENUM>"
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52 let formats = xml.findAll("formats")[0]
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53
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54 # gather all enums
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55
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56 type
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57 EnumEntry = object
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58 name: string
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59 value: string
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60
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61 EnumDef = object
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62 name: string
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63 values: seq[EnumEntry]
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64 isBitmask: bool
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65
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66 ConstantDef = object
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67 name: string
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68 datatype: string
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69 value: string
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70
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71 var consts: seq[ConstantDef]
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72 var enums: Table[string, EnumDef]
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73
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74 func addValue(edef: var EnumDef, n: XmlNode) =
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75 if n.attr("deprecated") != "aliased" and n.attr("alias") == "":
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76 if n.attr("name") in edef.values.mapIt(it.name):
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77 return
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78 if n.attr("name").endsWith("_EXT") and
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79 n.attr("name")[0 ..< ^4] in edef.values.mapIt(it.name):
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80 return
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81
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82 var value = ""
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83 if n.attr("value") != "":
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84 value = n.attr("value")
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85 elif n.attr("bitpos") != "":
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86 value = $(1 shl parseInt(n.attr("bitpos")))
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87 elif n.attr("offset") != "":
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88 var enumBase = 1000000000
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89 if n.attr("extnumber") != "":
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90 enumBase += (smartParseInt(n.attr("extnumber")) - 1) * 1000
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91 var v = smartParseInt(n.attr("offset")) + enumBase
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92 if n.attr("dir") == "-":
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93 v = -v
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94 value = $(v)
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95
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96 edef.values.add EnumEntry(name: n.attr("name"), value: value)
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97
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98 func memberDecl(n: XmlNode): string =
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99 for i in 0 ..< n.len:
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100 if n[i].kind == xnElement and n[i].tag == "comment":
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101 n.delete(i)
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102 break
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103 assert n.tag == "member"
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104 debugecho n.toSeq, " ", n.len
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105 if n.len == 2:
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106 return &"{n[1][0].text}: {n[0][0]}"
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107 elif n.len == 3:
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108 if n[1].kind == xnElement and n[1].tag == "name":
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109 return
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110 &"{n[1][0].text}: array[{n[2].text[1 ..< ^1]}, {TYPEMAP.getOrDefault(n[0][0].text, n[0][0].text)}]]"
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111 else:
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112 assert n[1].text.strip() == "*"
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113 return &"{n[2][0].text}: ptr {n[0][0].text}"
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114 elif n.len == 4:
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115 if n[0].text.strip() in ["struct", "const struct"]:
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116 return &"{n[3][0].text}: ptr {n[1][0].text}"
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117 else:
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118 assert n[2].text.strip() in ["*", "* const *", "* const*"]
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119 return &"?"
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120 elif n.len in [5, 6]:
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121 return &"{n[1][0].text}: array[{n[3][0].text}, {n[0][0].text}]"
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122 assert false
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123
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124 for e in xmlenums:
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125 if e.attr("type") == "constants":
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126 for c in e.findAll("enum"):
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127 var value = c.attr("value").strip(chars = {'(', ')'})
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128 consts.add ConstantDef(
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129 name: c.attr("name"), datatype: TYPEMAP[c.attr("type")], value: value
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130 )
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131 elif e.attr("type") == "enum":
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132 var edef = EnumDef(name: e.attr("name"), isBitmask: false)
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133 for ee in e.findAll("enum"):
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134 edef.addValue(ee)
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135 enums[edef.name] = edef
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136 elif e.attr("type") == "bitmask":
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137 var edef = EnumDef(name: e.attr("name"), isBitmask: true)
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138 for ee in e.findAll("enum"):
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139 edef.addValue(ee)
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140 enums[edef.name] = edef
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141
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142 for f in features:
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143 for extendenum in f.findAll("enum"):
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144 if extendenum.attr("extends") != "":
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145 enums[extendenum.attr("extends")].addValue(extendenum)
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146
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147 for extension in extensions.findAll("extension"):
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148 let extNum = extension.attr("number")
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149 for extendenum in extension.findAll("enum"):
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150 if extendenum.attr("extends") != "":
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151 if extendenum.attr("extnumber") == "":
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152 extendenum.attrs["extnumber"] = extNum
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153 enums[extendenum.attr("extends")].addValue(extendenum)
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154
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155 let outPath = (system.currentSourcePath.parentDir() / "api.nim")
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156 let outFile = open(outPath, fmWrite)
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157
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158 # generate core types ===============================================================================
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159 # preamble, much easier to hardcode than to generate from xml
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160 outFile.writeLine """
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161 func VK_MAKE_API_VERSION*(
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162 variant: uint32, major: uint32, minor: uint32, patch: uint32
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163 ): uint32 {.compileTime.} =
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164 (variant shl 29) or (major shl 22) or (minor shl 12) or patch
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165 """
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166
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167 outFile.writeLine "type"
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168 outFile.writeLine """
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169 VkSampleMask = distinct uint32
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170 VkBool32 = distinct uint32
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171 VkFlags = distinct uint32
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172 VkFlags64 = distinct uint64
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173 VkDeviceSize = distinct uint64
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174 VkDeviceAddress = distinct uint64
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175 VkRemoteAddressNV = pointer
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176 """
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177
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178 for t in types:
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179 if t.attr("api") == "vulkansc":
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180 continue
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181 if t.attr("alias") != "":
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182 continue
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183 if t.attr("deprecated") == "true":
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184 continue
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185 if t.attr("category") == "include":
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186 continue
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187 if t.attr("category") == "define":
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188 continue
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189 if t.attr("category") == "bitmask":
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190 if t.len > 0 and t[0].text.startsWith("typedef"):
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191 outFile.writeLine &" {t[2][0].text} = distinct {t[1][0].text}"
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192 elif t.attr("category") == "union":
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193 let n = t.attr("name")
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194 outFile.writeLine &" {n}* {{.union.}} = object"
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195 for member in t.findAll("member"):
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196 outFile.writeLine &" {member.memberDecl()}"
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197 elif t.attr("category") == "handle":
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198 outFile.writeLine &" {t[2][0].text} = distinct pointer"
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199 elif t.attr("category") == "struct":
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200 let n = t.attr("name")
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201 outFile.writeLine &" {n}* = object"
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202 for member in t.findAll("member"):
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203 outFile.writeLine &" {member.memberDecl()}"
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204 # TODO: funcpointer
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205
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206 outFile.writeLine ""
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207
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208 # generate consts ===============================================================================
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209 outFile.writeLine "const"
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210 for c in consts:
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211 var value = c.value
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212 if value.endsWith("U"):
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213 value = value[0 ..^ 2] & "'u32"
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214 elif value.endsWith("ULL"):
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215 value = value[0 ..^ 4] & "'u64"
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216 if value[0] == '~':
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217 value = "not " & value[1 ..^ 1]
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218 outFile.writeLine &" {c.name}*: {c.datatype} = {value}"
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219 outFile.writeLine ""
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220
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221 # generate enums ===============================================================================
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222 outFile.writeLine "type"
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223 for edef in enums.values():
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224 if edef.values.len > 0:
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225 outFile.writeLine &" {edef.name}* {{.size: 4.}} = enum"
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226 for ee in edef.values:
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227 outFile.writeLine &" {ee.name} = {ee.value}"
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228 outFile.writeLine ""
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229
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230 outFile.writeLine """
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231 when defined(linux):
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232 include ../semicongine/rendering/vulkan/platform/xlib
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233 when defined(windows):
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234 include ../semicongine/rendering/vulkan/platform/win32
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235 """
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236
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237 outFile.close()
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238
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239 assert execCmd("nim c " & outPath) == 0