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annotate semicongine/vulkan/shader.nim @ 1139:114f395b9144

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did: finish refactoring and updated all tests accordingly
author sam <sam@basx.dev>
date Sat, 08 Jun 2024 14:58:25 +0700
parents 02e1d2658ff5
children
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1 import std/typetraits
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2 import std/os
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3 import std/enumerate
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4 import std/logging
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5 import std/hashes
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6 import std/strformat
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7 import std/strutils
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8
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9 import ../core
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10 import ./device
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11
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12 const DEFAULT_SHADER_VERSION = 450
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13 const DEFAULT_SHADER_ENTRYPOINT = "main"
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14
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15 let logger = newConsoleLogger()
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16 addHandler(logger)
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17
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18 type
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19 ShaderModule* = object
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20 device: Device
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21 vk*: VkShaderModule
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22 stage*: VkShaderStageFlagBits
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23 configuration*: ShaderConfiguration
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24 ShaderConfiguration* = object
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25 name*: string
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26 vertexBinary: seq[uint32]
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27 fragmentBinary: seq[uint32]
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28 entrypoint: string
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29 inputs*: seq[ShaderAttribute]
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30 intermediates*: seq[ShaderAttribute]
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31 outputs*: seq[ShaderAttribute]
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32 uniforms*: seq[ShaderAttribute]
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33 samplers*: seq[ShaderAttribute]
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34
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35 proc `$`*(shader: ShaderConfiguration): string =
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36 shader.name
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37 # &"Inputs: {shader.inputs}, Uniforms: {shader.uniforms}, Samplers: {shader.samplers}"
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38
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39 proc compileGlslToSPIRV(stage: VkShaderStageFlagBits, shaderSource: string, entrypoint: string): seq[uint32] {.compileTime.} =
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40 func stage2string(stage: VkShaderStageFlagBits): string {.compileTime.} =
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41 case stage
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42 of VK_SHADER_STAGE_VERTEX_BIT: "vert"
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43 of VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT: "tesc"
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44 of VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT: "tese"
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45 of VK_SHADER_STAGE_GEOMETRY_BIT: "geom"
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46 of VK_SHADER_STAGE_FRAGMENT_BIT: "frag"
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47 of VK_SHADER_STAGE_COMPUTE_BIT: "comp"
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48 else: ""
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49
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50 when defined(nimcheck): # will not run if nimcheck is running
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51 return result
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52
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53 let
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54 stagename = stage2string(stage)
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55 shaderHash = hash(shaderSource)
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56 shaderfile = getTempDir() / &"shader_{shaderHash}.{stagename}"
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58
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59 if not shaderfile.fileExists:
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60 echo "shader of type ", stage, ", entrypoint ", entrypoint
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61 for i, line in enumerate(shaderSource.splitlines()):
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62 echo " ", i + 1, " ", line
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63 var glslExe = currentSourcePath.parentDir.parentDir.parentDir / "tools" / "glslangValidator"
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64 when defined(windows):
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65 glslExe = glslExe & "." & ExeExt
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66 let command = &"{glslExe} --entry-point {entrypoint} -V --stdin -S {stagename} -o {shaderfile}"
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67 echo "run: ", command
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68 discard StaticExecChecked(
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69 command = command,
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70 input = shaderSource
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71 )
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72 else:
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73 echo &"shaderfile {shaderfile} is up-to-date"
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74
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75 when defined(mingw) and defined(linux): # required for crosscompilation, path separators get messed up
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76 let shaderbinary = staticRead shaderfile.replace("\\", "/")
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77 else:
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78 let shaderbinary = staticRead shaderfile
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79
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80 var i = 0
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81 while i < shaderbinary.len:
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82 result.add(
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83 (uint32(shaderbinary[i + 0]) shl 0) or
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84 (uint32(shaderbinary[i + 1]) shl 8) or
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85 (uint32(shaderbinary[i + 2]) shl 16) or
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86 (uint32(shaderbinary[i + 3]) shl 24)
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87 )
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88 i += 4
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89
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90 proc compileGlslCode(
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91 stage: VkShaderStageFlagBits,
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92 inputs: openArray[ShaderAttribute] = [],
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93 uniforms: openArray[ShaderAttribute] = [],
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94 samplers: openArray[ShaderAttribute] = [],
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95 outputs: openArray[ShaderAttribute] = [],
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96 version = DEFAULT_SHADER_VERSION,
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97 entrypoint = DEFAULT_SHADER_ENTRYPOINT,
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98 main: string
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99 ): seq[uint32] {.compileTime.} =
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100
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101 let code = @[&"#version {version}", "#extension GL_EXT_scalar_block_layout : require", ""] &
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102 (if inputs.len > 0: inputs.GlslInput() & @[""] else: @[]) &
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103 (if uniforms.len > 0: uniforms.GlslUniforms(binding = 0) & @[""] else: @[]) &
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104 (if samplers.len > 0: samplers.GlslSamplers(basebinding = if uniforms.len > 0: 1 else: 0) & @[""] else: @[]) &
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105 (if outputs.len > 0: outputs.GlslOutput() & @[""] else: @[]) &
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106 @[&"void {entrypoint}(){{"] &
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107 main &
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108 @[&"}}"]
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109 compileGlslToSPIRV(stage, code.join("\n"), entrypoint)
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110
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111 proc CreateShaderConfiguration*(
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112 name: string,
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113 inputs: openArray[ShaderAttribute] = [],
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114 intermediates: openArray[ShaderAttribute] = [],
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115 outputs: openArray[ShaderAttribute] = [],
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116 uniforms: openArray[ShaderAttribute] = [],
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117 samplers: openArray[ShaderAttribute] = [],
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118 version = DEFAULT_SHADER_VERSION,
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119 entrypoint = DEFAULT_SHADER_ENTRYPOINT,
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120 vertexCode: string,
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121 fragmentCode: string,
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122 ): ShaderConfiguration {.compileTime.} =
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123 ShaderConfiguration(
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124 name: name,
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125 vertexBinary: compileGlslCode(
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126 stage = VK_SHADER_STAGE_VERTEX_BIT,
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127 inputs = inputs,
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128 outputs = intermediates,
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129 uniforms = uniforms,
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130 samplers = samplers,
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131 main = vertexCode,
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132 ),
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133 fragmentBinary: compileGlslCode(
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134 stage = VK_SHADER_STAGE_FRAGMENT_BIT,
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135 inputs = intermediates,
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136 outputs = outputs,
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137 uniforms = uniforms,
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138 samplers = samplers,
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139 main = fragmentCode,
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140 ),
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141 entrypoint: entrypoint,
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142 inputs: @inputs,
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143 intermediates: @intermediates,
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144 outputs: @outputs,
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145 uniforms: @uniforms,
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146 samplers: @samplers,
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147 )
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148
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149
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150 proc CreateShaderModules*(
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151 device: Device,
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152 shaderConfiguration: ShaderConfiguration,
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153 ): (ShaderModule, ShaderModule) =
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154 assert device.vk.Valid
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155 assert len(shaderConfiguration.vertexBinary) > 0
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156 assert len(shaderConfiguration.fragmentBinary) > 0
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157
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158 result[0].device = device
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159 result[1].device = device
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160 result[0].configuration = shaderConfiguration
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161 result[1].configuration = shaderConfiguration
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162 result[0].stage = VK_SHADER_STAGE_VERTEX_BIT
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163 result[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT
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164
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165 var createInfoVertex = VkShaderModuleCreateInfo(
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166 sType: VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
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167 codeSize: uint(shaderConfiguration.vertexBinary.len * sizeof(uint32)),
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168 pCode: addr(shaderConfiguration.vertexBinary[0]),
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169 )
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170 checkVkResult vkCreateShaderModule(device.vk, addr(createInfoVertex), nil, addr(result[0].vk))
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171 var createInfoFragment = VkShaderModuleCreateInfo(
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172 sType: VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
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173 codeSize: uint(shaderConfiguration.fragmentBinary.len * sizeof(uint32)),
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174 pCode: addr(shaderConfiguration.fragmentBinary[0]),
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175 )
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176 checkVkResult vkCreateShaderModule(device.vk, addr(createInfoFragment), nil, addr(result[1].vk))
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177
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178 proc GetVertexInputInfo*(
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179 shaderConfiguration: ShaderConfiguration,
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180 bindings: var seq[VkVertexInputBindingDescription],
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181 attributes: var seq[VkVertexInputAttributeDescription],
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182 baseBinding = 0'u32
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183 ): VkPipelineVertexInputStateCreateInfo =
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184 var location = 0'u32
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185 var binding = baseBinding
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186
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187 for attribute in shaderConfiguration.inputs:
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188 bindings.add VkVertexInputBindingDescription(
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189 binding: binding,
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190 stride: uint32(attribute.Size),
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191 inputRate: if attribute.perInstance: VK_VERTEX_INPUT_RATE_INSTANCE else: VK_VERTEX_INPUT_RATE_VERTEX,
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192 )
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193 # allows to submit larger data structures like Mat44, for most other types will be 1
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194 for i in 0 ..< attribute.thetype.NumberOfVertexInputAttributeDescriptors:
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195 attributes.add VkVertexInputAttributeDescription(
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196 binding: binding,
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197 location: location,
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198 format: attribute.thetype.GetVkFormat,
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199 offset: uint32(i * attribute.Size(perDescriptor = true)),
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200 )
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201 location += uint32(attribute.thetype.NLocationSlots)
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202 inc binding
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203
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204 return VkPipelineVertexInputStateCreateInfo(
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205 sType: VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
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206 vertexBindingDescriptionCount: uint32(bindings.len),
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207 pVertexBindingDescriptions: bindings.ToCPointer,
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208 vertexAttributeDescriptionCount: uint32(attributes.len),
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209 pVertexAttributeDescriptions: attributes.ToCPointer,
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210 )
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211
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212
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213 proc GetPipelineInfo*(shader: ShaderModule): VkPipelineShaderStageCreateInfo =
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214 VkPipelineShaderStageCreateInfo(
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215 sType: VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
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216 stage: shader.stage,
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217 module: shader.vk,
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218 pName: cstring(shader.configuration.entrypoint),
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219 )
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220
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221 proc Destroy*(shader: var ShaderModule) =
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222 assert shader.device.vk.Valid
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223 assert shader.vk.Valid
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224 shader.device.vk.vkDestroyShaderModule(shader.vk, nil)
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225 shader.vk.Reset