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78
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1 import std/os
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2 import std/sugar
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3 import std/algorithm
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4 import std/strformat
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5 import std/strutils
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6 import std/sequtils
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7 import std/streams
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8 import std/tables
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9 import httpClient
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10 import std/xmlparser
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11 import std/xmltree
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12
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13 type
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14 FileContent = seq[string]
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15
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16 const
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17 TYPEMAP = {
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18 "void": "void",
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19 "char": "char",
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20 "float": "float32",
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21 "double": "float64",
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22 "int8_t": "int8",
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23 "uint8_t": "uint8",
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24 "int16_t": "int16",
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25 "uint16_t": "uint16",
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26 "int32_t": "int32",
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27 "uint32_t": "uint32",
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28 "uint64_t": "uint64",
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29 "int64_t": "int64",
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30 "size_t": "csize_t",
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31 "int": "cint",
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32 "void*": "pointer",
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33 "char*": "cstring",
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34 "ptr char": "cstring",
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35 "ptr void": "pointer",
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36 "VK_DEFINE_HANDLE": "VkHandle",
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37 "VK_DEFINE_NON_DISPATCHABLE_HANDLE": "VkNonDispatchableHandle",
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38 }.toTable
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39 PLATFORM_HEADER_MAP = {
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79
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40 "X11/Xlib.h": @["xlib", "xlib_xrandr"],
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41 "X11/extensions/Xrandr.h": @["xlib_xrandr"],
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42 "wayland-client.h": @["wayland"],
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43 "windows.h": @["win32"],
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44 "xcb/xcb.h": @["xcb"],
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45 "directfb.h": @["directfb"],
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46 "zircon/types.h": @["fuchsia"],
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47 "ggp_c/vulkan_types.h": @["ggp"],
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48 "screen/screen.h": @["screen"],
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49 "nvscisync.h": @["sci"],
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50 "nvscibuf.h": @["sci"],
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51 "vk_video/vulkan_video_codec_h264std.h": @["provisional"],
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52 "vk_video/vulkan_video_codec_h264std_decode.h": @["provisional"],
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53 "vk_video/vulkan_video_codec_h264std_encode.h": @["provisional"],
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54 "vk_video/vulkan_video_codec_h265std.h": @["provisional"],
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55 "vk_video/vulkan_video_codec_h265std_decode.h": @["provisional"],
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56 "vk_video/vulkan_video_codec_h265std_encode.h": @["provisional"],
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78
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57 }.toTable
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58 MAP_KEYWORD = {
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59 "object": "theobject",
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60 "type": "thetype",
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61 }.toTable
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79
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62 SPECIAL_DEPENDENCIES = {
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63 "VK_NV_ray_tracing": "VK_KHR_ray_tracing_pipeline",
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64 }.toTable
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78
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65
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66 # helpers
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67 func mapType(typename: string): auto =
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68 TYPEMAP.getOrDefault(typename.strip(), typename.strip()).strip(chars={'_'})
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69 func mapName(thename: string): auto =
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70 MAP_KEYWORD.getOrDefault(thename.strip(), thename.strip()).strip(chars={'_'})
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71 func smartParseInt(value: string): int =
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72 if value.startsWith("0x"):
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73 parseHexInt(value)
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74 else:
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75 parseInt(value)
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76 func hasAttr(node: XmlNode, attr: string): bool = node.attr(attr) != ""
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77 func tableSorted(table: Table[int, string]): seq[(int, string)] =
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78 result = toSeq(table.pairs)
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79 result.sort((a, b) => cmp(a[0], b[0]))
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80
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81 # serializers
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82 func serializeEnum(node: XmlNode, root: XmlNode): seq[string] =
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83 let name = node.attr("name")
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84 if name == "":
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85 return result
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86
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87 # find additional enum defintion in feature definitions
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88 var values: Table[int, string]
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89 for feature in root.findAll("feature"):
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90 for require in feature.findAll("require"):
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91 for theenum in require.findAll("enum"):
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92 if theenum.attr("extends") == name:
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93 if theenum.hasAttr("offset"):
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94 let enumBase = 1000000000 + (smartParseInt(theenum.attr("extnumber")) - 1) * 1000
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95 var value = smartParseInt(theenum.attr("offset")) + enumBase
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96 if theenum.attr("dir") == "-":
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97 value = -value
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98 values[value] = theenum.attr("name")
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99 elif theenum.hasAttr("value"):
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100 var value = smartParseInt(theenum.attr("value"))
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101 if theenum.attr("dir") == "-":
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102 value = -value
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103 values[value] = theenum.attr("name")
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104 elif theenum.hasAttr("bitpos"):
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105 var value = smartParseInt(theenum.attr("bitpos"))
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106 if theenum.attr("dir") == "-":
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107 value = -value
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108 values[value] = theenum.attr("name")
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109 elif theenum.hasAttr("alias"):
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110 discard
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111 else:
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112 raise newException(Exception, &"Unknown extension value: {feature}\nvalue:{theenum}")
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113 # find additional enum defintion in extension definitions
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114 for extension in root.findAll("extension"):
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115 let extensionNumber = parseInt(extension.attr("number"))
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116 let enumBase = 1000000000 + (extensionNumber - 1) * 1000
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117 for require in extension.findAll("require"):
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118 for theenum in require.findAll("enum"):
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119 if theenum.attr("extends") == name:
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120 if theenum.hasAttr("offset"):
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121 if theenum.hasAttr("extnumber"):
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122 let otherBase = 1000000000 + (smartParseInt(theenum.attr("extnumber")) - 1) * 1000
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123 var value = smartParseInt(theenum.attr("offset")) + otherBase
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124 if theenum.attr("dir") == "-":
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125 value = -value
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126 values[value] = theenum.attr("name")
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127 else:
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128 var value = smartParseInt(theenum.attr("offset")) + enumBase
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129 if theenum.attr("dir") == "-":
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130 value = -value
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131 values[value] = theenum.attr("name")
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132 elif theenum.hasAttr("value"):
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133 var value = smartParseInt(theenum.attr("value"))
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134 if theenum.attr("dir") == "-":
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135 value = -value
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136 values[value] = theenum.attr("name")
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137 elif theenum.hasAttr("bitpos"):
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138 var value = smartParseInt(theenum.attr("bitpos"))
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139 if theenum.attr("dir") == "-":
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140 value = -value
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141 values[value] = theenum.attr("name")
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142 elif theenum.hasAttr("alias"):
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143 discard
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144 else:
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145 raise newException(Exception, &"Unknown extension value: {extension}\nvalue:{theenum}")
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146
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147 # generate enums
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148 if node.attr("type") == "enum":
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149 for value in node.findAll("enum"):
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150 if value.hasAttr("alias"):
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151 continue
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152 if value.attr("value").startsWith("0x"):
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153 values[parseHexInt(value.attr("value"))] = value.attr("name")
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154 else:
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155 values[smartParseInt(value.attr("value"))] = value.attr("name")
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156 if values.len > 0:
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157 result.add " " & name & "* {.size: sizeof(cint).} = enum"
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158 for (value, name) in tableSorted(values):
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159 let enumEntry = &" {name} = {value}"
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160 result.add enumEntry
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161
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162 # generate bitsets (normal enums in the C API, but bitfield-enums in Nim)
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163 elif node.attr("type") == "bitmask":
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164 for value in node.findAll("enum"):
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79
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165 if value.hasAttr("bitpos"):
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166 values[smartParseInt(value.attr("bitpos"))] = value.attr("name")
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167 elif node.attr("name") == "VkVideoEncodeRateControlModeFlagBitsKHR": # special exception, for some reason this has values instead of bitpos
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168 values[smartParseInt(value.attr("value"))] = value.attr("name")
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78
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169 if values.len > 0:
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170 if node.hasAttr("bitwidth"):
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171 result.add " " & name & "* {.size: " & $(smartParseInt(node.attr("bitwidth")) div 8) & ".} = enum"
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172 else:
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173 result.add " " & name & "* {.size: sizeof(cint).} = enum"
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174 for (bitpos, enumvalue) in tableSorted(values):
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175 var value = "00000000000000000000000000000000"# makes the bit mask nicely visible
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176 if node.hasAttr("bitwidth"): # assumes this is always 64
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177 value = value & value
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178 value[^(bitpos + 1)] = '1'
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179 let enumEntry = &" {enumvalue} = 0b{value}"
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180 if not (enumEntry in result): # the specs define duplicate entries for backwards compat
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181 result.add enumEntry
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182 let cApiName = name.replace("FlagBits", "Flags")
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183 if node.hasAttr("bitwidth"): # assumes this is always 64
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184 if values.len > 0:
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185 result.add &"""converter BitsetToNumber*(flags: openArray[{name}]): {cApiName} =
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186 for flag in flags:
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187 result = {cApiName}(uint64(result) or uint(flag))"""
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188 result.add "type"
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189 else:
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190 if values.len > 0:
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191 result.add &"""converter BitsetToNumber*(flags: openArray[{name}]): {cApiName} =
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192 for flag in flags:
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193 result = {cApiName}(uint(result) or uint(flag))"""
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194 result.add "type"
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195
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196 func serializeStruct(node: XmlNode, root: XmlNode): seq[string] =
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197 let name = node.attr("name")
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198 var union = ""
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199 if node.attr("category") == "union":
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79
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200 union = "{.union.} "
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201 result.add &" {name}* {union}= object"
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78
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202 for member in node.findAll("member"):
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203 if not member.hasAttr("api") or member.attr("api") == "vulkan":
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204 let fieldname = member.child("name")[0].text.strip(chars={'_'})
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205 var fieldtype = member.child("type")[0].text.strip(chars={'_'})
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206 if member[member.len - 2].kind == xnText and member[member.len - 2].text.strip() == "*":
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207 fieldtype = &"ptr {mapType(fieldtype)}"
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208 fieldtype = mapType(fieldtype)
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209 result.add &" {mapName(fieldname)}*: {fieldtype}"
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210
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211 func serializeFunctiontypes(api: XmlNode): seq[string] =
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212 for node in api.findAll("type"):
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213 if node.attr("category") == "funcpointer":
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214 let name = node[1][0]
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215 let returntype = mapType(node[0].text[8 .. ^1].split('(', 1)[0])
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216 var params: seq[string]
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217 for i in countup(3, node.len - 1, 2):
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218 var paramname = node[i + 1].text.split(',', 1)[0].split(')', 1)[0]
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219 var paramtype = node[i][0].text
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220 if paramname[0] == '*':
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221 paramname = paramname.rsplit(" ", 1)[1]
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222 paramtype = "ptr " & paramtype
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223 paramname = mapName(paramname)
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224 params.add &"{paramname}: {mapType(paramtype)}"
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225 let paramsstr = params.join(", ")
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79
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226 result.add(&" {name}* = proc({paramsstr}): {returntype} {{.cdecl.}}")
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78
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227
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79
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228 func serializeType(node: XmlNode, headerTypes: Table[string, string]): Table[string, seq[string]] =
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78
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229 if node.attrsLen == 0:
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230 return
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231 if node.attr("requires") == "vk_platform" or node.attr("category") == "include":
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232 return
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233 result["basetypes"] = @[]
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234 result["enums"] = @[]
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235
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236 # include-defined types (in platform headers)
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79
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237 if node.attr("name") in headerTypes:
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238 for platform in PLATFORM_HEADER_MAP[node.attr("requires")]:
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239 let platformfile = "platform/" & platform
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240 if not result.hasKey(platformfile):
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241 result[platformfile] = @[]
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242 result[platformfile].add " " & node.attr("name").strip(chars={'_'}) & " {.header: \"" & node.attr("requires") & "\".} = object"
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78
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243 # generic base types
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244 elif node.attr("category") == "basetype":
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245 let typechild = node.child("type")
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246 let namechild = node.child("name")
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247 if typechild != nil and namechild != nil:
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248 var typename = typechild[0].text
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249 if node[2].kind == xnText and node[2].text.strip() == "*":
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250 typename = &"ptr {typename}"
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251 result["basetypes"].add &" {namechild[0].text}* = {mapType(typename)}"
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252 elif namechild != nil:
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253 result["basetypes"].add &" {namechild[0].text}* = object"
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254 # function pointers need to be handled with structs
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255 elif node.attr("category") == "funcpointer":
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256 discard
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257 # preprocessor defines, ignored
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258 elif node.attr("category") == "define":
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259 discard
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260 # bitmask aliases
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261 elif node.attr("category") == "bitmask":
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262 if node.hasAttr("alias"):
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263 let name = node.attr("name")
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264 let alias = node.attr("alias")
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265 result["enums"].add &" {name}* = {alias}"
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266 # distinct resource ID types aka handles
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267 elif node.attr("category") == "handle":
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268 if not node.hasAttr("alias"):
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269 let name = node.child("name")[0].text
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270 var thetype = mapType(node.child("type")[0].text)
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271 result["basetypes"].add &" {name}* = distinct {thetype}"
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272 # enum aliases
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273 elif node.attr("category") == "enum":
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274 if node.hasAttr("alias"):
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275 let name = node.attr("name")
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276 let alias = node.attr("alias")
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277 result["enums"].add &" {name}* = {alias}"
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278 else:
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279 discard
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280
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79
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281 func serializeCommand(node: XmlNode): (string, string) =
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282 let
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283 proto = node.child("proto")
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284 resulttype = mapType(proto.child("type")[0].text)
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285 name = proto.child("name")[0].text
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286 var params: seq[string]
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287 for param in node:
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288 if param.tag == "param" and param.attr("api") in ["", "vulkan"]:
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289 let fieldname = param.child("name")[0].text.strip(chars={'_'})
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290 var fieldtype = param.child("type")[0].text.strip(chars={'_'})
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291 if param[param.len - 2].kind == xnText and param[param.len - 2].text.strip() == "*":
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292 fieldtype = &"ptr {mapType(fieldtype)}"
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293 fieldtype = mapType(fieldtype)
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294 params.add &"{mapName(fieldname)}: {fieldtype}"
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295 let allparams = params.join(", ")
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296 return (name, &"proc({allparams}): {resulttype} {{.stdcall.}}")
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297
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78
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298
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299 proc update(a: var Table[string, seq[string]], b: Table[string, seq[string]]) =
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300 for k, v in b.pairs:
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301 if not a.hasKey(k):
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302 a[k] = @[]
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303 a[k].add v
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304
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305
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306 proc main() =
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307 if not os.fileExists("vk.xml"):
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308 let client = newHttpClient()
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309 let glUrl = "https://raw.githubusercontent.com/KhronosGroup/Vulkan-Docs/main/xml/vk.xml"
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310 client.downloadFile(glUrl, "vk.xml")
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311
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312 let api = loadXml("vk.xml")
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313
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314 const outdir = "src/vulkan_api/output"
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315 removeDir outdir
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316 createDir outdir
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317 createDir outdir / "platform"
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318
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319 # index all names that are only available on certain platforms
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320 var platformTypes: Table[string, string]
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321 for extension in api.findAll("extension"):
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322 if extension.hasAttr("platform"):
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323 for thetype in extension.findAll("type"):
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324 platformTypes[thetype.attr("name")] = extension.attr("platform")
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325 for command in extension.findAll("command"):
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326 platformTypes[command.attr("name")] = extension.attr("platform")
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327 elif extension.attr("name").startsWith("VK_KHR_video"):
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328 for thetype in extension.findAll("type"):
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79
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329 platformTypes[thetype.attr("name")] = "provisional"
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78
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330 for command in extension.findAll("command"):
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79
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331 platformTypes[command.attr("name")] = "provisional"
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78
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332
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333 var outputFiles = {
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79
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334 "basetypes": @[
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335 "import std/dynlib",
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336 "type",
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337 " VkHandle* = distinct pointer",
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338 " VkNonDispatchableHandle* = distinct pointer",
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339 "when defined(linux):",
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340 " let vulkanLib* = loadLib(\"libvulkan.so.1\")",
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341 "when defined(windows):",
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342 " let vulkanLib* = loadLib(\"vulkan-1.dll\")",
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343 "if vulkanLib == nil:",
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344 " raise newException(Exception, \"Unable to load vulkan library\")",
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345 "type",
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346 ],
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347 "structs": @["type"],
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348 "enums": @["type"],
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349 "commands": @[],
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78
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350 }.toTable
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351
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352 # enums
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353 for thetype in api.findAll("type"):
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354 if thetype.attr("category") == "bitmask" and not thetype.hasAttr("alias") and (not thetype.hasAttr("api") or thetype.attr("api") == "vulkan"):
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355 let name = thetype.child("name")[0].text
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356 outputFiles["enums"].add &" {name}* = distinct VkFlags"
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357 for theenum in api.findAll("enums"):
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358 outputFiles["enums"].add serializeEnum(theenum, api)
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359
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360 # structs and function types need to be in same "type" block to avoid forward-declarations
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361 outputFiles["structs"].add serializeFunctiontypes(api)
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362 for thetype in api.findAll("type"):
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363 if thetype.attr("category") == "struct" or thetype.attr("category") == "union":
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364 var outfile = "structs"
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365 if thetype.attr("name") in platformTypes:
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366 outfile = "platform/" & platformTypes[thetype.attr("name")]
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367 if not (outfile in outputFiles):
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368 outputFiles[outfile] = @[]
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369 outputFiles[outfile].add serializeStruct(thetype, api)
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370
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371 # types
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79
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372 var headerTypes: Table[string, string]
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373 for types in api.findAll("types"):
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374 for thetype in types.findAll("type"):
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375 if thetype.attrsLen == 2 and thetype.hasAttr("requires") and thetype.hasAttr("name") and thetype.attr("requires") != "vk_platform":
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376 let name = thetype.attr("name")
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377 let incld = thetype.attr("requires")
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378 headerTypes[name] = &"{name} {{.header: \"{incld}\".}} = object"
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379
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78
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380 for typesgroup in api.findAll("types"):
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381 for thetype in typesgroup.findAll("type"):
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79
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382 outputFiles.update serializeType(thetype, headerTypes)
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383
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384 # commands aka functions
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385 var varDecls: Table[string, string]
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386 var procLoads: Table[string, string] # procloads need to be packed into feature/extension loader procs
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387 for commands in api.findAll("commands"):
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388 for command in commands.findAll("command"):
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389 if command.attr("api") != "vulkansc":
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390 if command.hasAttr("alias"):
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391 let name = command.attr("name")
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392 let alias = command.attr("alias")
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393 let thetype = varDecls[alias].split(":", 1)[1].strip()
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394 varDecls[name] = &" {name}*: {thetype}"
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395 procLoads[name] = &" {name} = {alias}"
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396 else:
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397 let (name, thetype) = serializeCommand(command)
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398 varDecls[name] = &" {name}*: {thetype}"
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399 procLoads[name] = &" {name} = cast[{thetype}](checkedSymAddr(vulkanLib, \"{name}\"))"
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400 var declared: seq[string]
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401 var featureloads: seq[string]
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402 for feature in api.findAll("feature"):
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403 if feature.attr("api") in ["vulkan", "vulkan,vulkansc"]:
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404 let name = feature.attr("name")
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405 outputFiles["commands"].add &"# feature {name}"
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406 outputFiles["commands"].add "var"
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407 for command in feature.findAll("command"):
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408 if not (command.attr("name") in declared):
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409 outputFiles["commands"].add varDecls[command.attr("name")]
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410 declared.add command.attr("name")
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411 featureloads.add &"load{name}"
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412 outputFiles["commands"].add &"proc load{name}*() ="
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413 for command in feature.findAll("command"):
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414 outputFiles["commands"].add procLoads[command.attr("name")]
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|
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415 outputFiles["commands"].add ""
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|
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416 outputFiles["commands"].add ["proc loadAll*() ="]
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|
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417 for l in featureloads:
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|
|
418 outputFiles["commands"].add [&" {l}()"]
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|
|
419 outputFiles["commands"].add ""
|
|
|
420
|
|
|
421 # for promoted extensions, dependants need to call the load-function of the promoted feature/extension
|
|
|
422 # use table to store promotions
|
|
|
423 var promotions: Table[string, string]
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|
|
424 for extensions in api.findAll("extensions"):
|
|
|
425 for extension in extensions.findAll("extension"):
|
|
|
426 if extension.hasAttr("promotedto"):
|
|
|
427 promotions[extension.attr("name")] = extension.attr("promotedto")
|
|
|
428
|
|
|
429 var extensionDependencies: Table[string, (seq[string], XmlNode)]
|
|
|
430 var features: seq[string]
|
|
|
431 for feature in api.findAll("feature"):
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|
|
432 features.add feature.attr("name")
|
|
|
433 for extensions in api.findAll("extensions"):
|
|
|
434 for extension in extensions.findAll("extension"):
|
|
|
435 let name = extension.attr("name")
|
|
|
436 extensionDependencies[name] = (@[], extension)
|
|
|
437 if extension.hasAttr("depends"):
|
|
|
438 extensionDependencies[name] = (extension.attr("depends").split("+"), extension)
|
|
|
439 if extension.attr("depends").startsWith("("): # no need for full tree parser, only single place where we can use a feature
|
|
|
440 let dependencies = extension.attr("depends").rsplit({')'}, 1)[1][1 .. ^1].split("+")
|
|
|
441 extensionDependencies[name] = (dependencies, extension)
|
|
|
442 if name in SPECIAL_DEPENDENCIES:
|
|
|
443 extensionDependencies[name][0].add SPECIAL_DEPENDENCIES[name]
|
|
|
444
|
|
|
445 var dependencyOrderedExtensions: OrderedTable[string, XmlNode]
|
|
|
446 while extensionDependencies.len > 0:
|
|
|
447 var delkeys: seq[string]
|
|
|
448 for extensionName, (dependencies, extension) in extensionDependencies.pairs:
|
|
|
449 var missingExtension = false
|
|
|
450 for dep in dependencies:
|
|
|
451 let realdep = promotions.getOrDefault(dep, dep)
|
|
|
452 if not (realdep in dependencyOrderedExtensions) and not (realdep in features):
|
|
|
453 missingExtension = true
|
|
|
454 break
|
|
|
455 if not missingExtension:
|
|
|
456 dependencyOrderedExtensions[extensionName] = extension
|
|
|
457 delkeys.add extensionName
|
|
|
458 for key in delkeys:
|
|
|
459 extensionDependencies.del key
|
|
|
460
|
|
|
461 for extension in dependencyOrderedExtensions.values:
|
|
|
462 if extension.hasAttr("promotedto"): # will be loaded in promoted place
|
|
|
463 continue
|
|
|
464 if extension.attr("supported") in ["", "vulkan", "vulkan,vulkansc"]:
|
|
|
465 var file = "commands"
|
|
|
466 if extension.attr("platform") != "":
|
|
|
467 file = "platform/" & extension.attr("platform")
|
|
|
468 elif extension.attr("name").startsWith("VK_KHR_video"): # hack since we do not include video headers by default
|
|
|
469 file = "platform/provisional"
|
|
|
470 let name = extension.attr("name")
|
|
|
471 if extension.findAll("command").len > 0:
|
|
|
472 outputFiles[file].add &"# extension {name}"
|
|
|
473 outputFiles[file].add "var"
|
|
|
474 for command in extension.findAll("command"):
|
|
|
475 if not (command.attr("name") in declared):
|
|
|
476 outputFiles[file].add varDecls[command.attr("name")]
|
|
|
477 declared.add command.attr("name")
|
|
|
478 outputFiles[file].add &"proc load{name}*() ="
|
|
|
479 var addedFunctionBody = false
|
|
|
480 if extension.hasAttr("depends"):
|
|
|
481 for dependency in extension.attr("depends").split("+"):
|
|
|
482 # need to check since some extensions have no commands and therefore no load-function
|
|
|
483 outputFiles[file].add &" load{promotions.getOrDefault(dependency, dependency)}()"
|
|
|
484 addedFunctionBody = true
|
|
|
485 for command in extension.findAll("command"):
|
|
|
486 outputFiles[file].add procLoads[command.attr("name")]
|
|
|
487 addedFunctionBody = true
|
|
|
488 if not addedFunctionBody:
|
|
|
489 outputFiles[file].add " discard"
|
|
|
490 outputFiles[file].add ""
|
|
|
491
|
|
|
492 var mainout: seq[string]
|
|
|
493 for section in ["basetypes", "enums", "structs", "commands"]:
|
|
|
494 mainout.add outputFiles[section]
|
|
|
495 writeFile outdir / &"types.nim", mainout.join("\n")
|
|
|
496
|
|
78
|
497 for filename, filecontent in outputFiles.pairs:
|
|
79
|
498 if filename.startsWith("platform/"):
|
|
|
499 writeFile outdir / &"{filename}.nim", (@[
|
|
|
500 "import std/dynlib",
|
|
|
501 "import ../types",
|
|
|
502 "type"
|
|
|
503 ] & filecontent).join("\n")
|
|
78
|
504
|
|
|
505 when isMainModule:
|
|
|
506 main()
|
