Vulkan 中的 HLSL

#version 450

layout (location = 0) in vec3 inPosition;
layout (location = 1) in vec3 inColor;

layout (binding = 0) uniform UBO
{
	mat4 projectionMatrix;
	mat4 modelMatrix;
	mat4 viewMatrix;
} ubo;

layout (location = 0) out vec3 outColor;

void main()
{
	outColor = inColor * float(gl_VertexIndex);
	gl_Position = ubo.projectionMatrix * ubo.viewMatrix * ubo.modelMatrix * vec4(inPosition.xyz, 1.0);
}

struct VSInput
{
[[vk::location(0)]] float3 Position : POSITION0;
[[vk::location(1)]] float3 Color : COLOR0;
};

struct UBO
{
	float4x4 projectionMatrix;
	float4x4 modelMatrix;
	float4x4 viewMatrix;
};

cbuffer ubo : register(b0, space0) { UBO ubo; }

struct VSOutput
{
	float4 Pos : SV_POSITION;
[[vk::location(0)]] float3 Color : COLOR0;
};

VSOutput main(VSInput input, uint VertexIndex : SV_VertexID)
{
	VSOutput output = (VSOutput)0;
	output.Color = input.Color * float(VertexIndex);
	output.Pos = mul(ubo.projectionMatrix, mul(ubo.viewMatrix, mul(ubo.modelMatrix, float4(input.Position.xyz, 1.0))));
	return output;
}

dxc.exe -spirv -T vs_6_0 -E main .\triangle.vert -Fo .\triangle.vert.spv

dxc.exe -spirv -T vs_6_1 -E main .\input.vert -Fo .\output.vert.spv -fspv-extension=SPV_EXT_descriptor_indexing

#include "include/dxc/dxcapi.h"

...

HRESULT hres;

// Initialize DXC library
CComPtr<IDxcLibrary> library;
hres = DxcCreateInstance(CLSID_DxcLibrary, IID_PPV_ARGS(&library));
if (FAILED(hres)) {
	throw std::runtime_error("Could not init DXC Library");
}

// Initialize DXC compiler
CComPtr<IDxcCompiler3> compiler;
hres = DxcCreateInstance(CLSID_DxcCompiler, IID_PPV_ARGS(&compiler));
if (FAILED(hres)) {
	throw std::runtime_error("Could not init DXC Compiler");
}

// Initialize DXC utility
CComPtr<IDxcUtils> utils;
hres = DxcCreateInstance(CLSID_DxcUtils, IID_PPV_ARGS(&utils));
if (FAILED(hres)) {
	throw std::runtime_error("Could not init DXC Utiliy");
}

// Load the HLSL text shader from disk
uint32_t codePage = DXC_CP_ACP;
CComPtr<IDxcBlobEncoding> sourceBlob;
hres = utils->LoadFile(filename.c_str(), &codePage, &sourceBlob);
if (FAILED(hres)) {
	throw std::runtime_error("Could not load shader file");
}

// Select target profile based on shader file extension
LPCWSTR targetProfile{};
size_t idx = filename.rfind('.');
if (idx != std::string::npos) {
	std::wstring extension = filename.substr(idx + 1);
	if (extension == L"vert") {
		targetProfile = L"vs_6_1";
	}
	if (extension == L"frag") {
		targetProfile = L"ps_6_1";
	}
	// Mapping for other file types go here (cs_x_y, lib_x_y, etc.)
}

// Configure the compiler arguments for compiling the HLSL shader to SPIR-V
std::vector<LPCWSTR> arguments = {
	// (Optional) name of the shader file to be displayed e.g. in an error message
	filename.c_str(),
	// Shader main entry point
	L"-E", L"main",
	// Shader target profile
	L"-T", targetProfile,
	// Compile to SPIRV
	L"-spirv"
};

// Compile shader
DxcBuffer buffer{};
buffer.Encoding = DXC_CP_ACP;
buffer.Ptr = sourceBlob->GetBufferPointer();
buffer.Size = sourceBlob->GetBufferSize();

CComPtr<IDxcResult> result{ nullptr };
hres = compiler->Compile(
	&buffer,
	arguments.data(),
	(uint32_t)arguments.size(),
	nullptr,
	IID_PPV_ARGS(&result));

if (SUCCEEDED(hres)) {
	result->GetStatus(&hres);
}

// Output error if compilation failed
if (FAILED(hres) && (result)) {
	CComPtr<IDxcBlobEncoding> errorBlob;
	hres = result->GetErrorBuffer(&errorBlob);
	if (SUCCEEDED(hres) && errorBlob) {
		std::cerr << "Shader compilation failed :\n\n" << (const char*)errorBlob->GetBufferPointer();
		throw std::runtime_error("Compilation failed");
	}
}

// Get compilation result
CComPtr<IDxcBlob> code;
result->GetResult(&code);

// Create a Vulkan shader module from the compilation result
VkShaderModuleCreateInfo shaderModuleCI{};
shaderModuleCI.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
shaderModuleCI.codeSize = code->GetBufferSize();
shaderModuleCI.pCode = (uint32_t*)code->GetBufferPointer();
VkShaderModule shaderModule;
vkCreateShaderModule(device, &shaderModuleCI, nullptr, &shaderModule);