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Vulkan: Compute shader support

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This commit is contained in:
Stenzek
2016-12-09 22:23:04 +10:00
parent 02f887ede0
commit 5fbc63fbcf
11 changed files with 507 additions and 13 deletions
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46
Source/Core/VideoBackends/Vulkan/ShaderCompiler.cpp
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@ -35,7 +35,7 @@ static const TBuiltInResource* GetCompilerResourceLimits();
// Compile a shader to SPIR-V via glslang
static bool CompileShaderToSPV(SPIRVCodeVector* out_code, EShLanguage stage,
const char* stage_filename, const char* source_code,
size_t source_code_length, bool prepend_header);
size_t source_code_length, const char* header, size_t header_length);
// Regarding the UBO bind points, we subtract one from the binding index because
// the OpenGL backend requires UBO #0 for non-block uniforms (at least on NV).
@ -73,9 +73,32 @@ static const char SHADER_HEADER[] = R"(
#define gl_VertexID gl_VertexIndex
#define gl_InstanceID gl_InstanceIndex
)";
static const char COMPUTE_SHADER_HEADER[] = R"(
// Target GLSL 4.5.
#version 450 core
// All resources are packed into one descriptor set for compute.
#define UBO_BINDING(packing, x) layout(packing, set = 0, binding = (0 + x))
#define SAMPLER_BINDING(x) layout(set = 0, binding = (1 + x))
#define TEXEL_BUFFER_BINDING(x) layout(set = 0, binding = (5 + x))
#define IMAGE_BINDING(format, x) layout(format, set = 0, binding = (7 + x))
// hlsl to glsl function translation
#define float2 vec2
#define float3 vec3
#define float4 vec4
#define uint2 uvec2
#define uint3 uvec3
#define uint4 uvec4
#define int2 ivec2
#define int3 ivec3
#define int4 ivec4
#define frac fract
#define lerp mix
)";
bool CompileShaderToSPV(SPIRVCodeVector* out_code, EShLanguage stage, const char* stage_filename,
const char* source_code, size_t source_code_length, bool prepend_header)
const char* source_code, size_t source_code_length, const char* header,
size_t header_length)
{
if (!InitializeGlslang())
return false;
@ -91,10 +114,10 @@ bool CompileShaderToSPV(SPIRVCodeVector* out_code, EShLanguage stage, const char
std::string full_source_code;
const char* pass_source_code = source_code;
int pass_source_code_length = static_cast<int>(source_code_length);
if (prepend_header)
if (header_length > 0)
{
full_source_code.reserve(sizeof(SHADER_HEADER) + source_code_length);
full_source_code.append(SHADER_HEADER, sizeof(SHADER_HEADER) - 1);
full_source_code.reserve(header_length + source_code_length);
full_source_code.append(header, header_length);
full_source_code.append(source_code, source_code_length);
pass_source_code = full_source_code.c_str();
pass_source_code_length = static_cast<int>(full_source_code.length());
@ -318,21 +341,28 @@ bool CompileVertexShader(SPIRVCodeVector* out_code, const char* source_code,
size_t source_code_length, bool prepend_header)
{
return CompileShaderToSPV(out_code, EShLangVertex, "vs", source_code, source_code_length,
prepend_header);
SHADER_HEADER, sizeof(SHADER_HEADER) - 1);
}
bool CompileGeometryShader(SPIRVCodeVector* out_code, const char* source_code,
size_t source_code_length, bool prepend_header)
{
return CompileShaderToSPV(out_code, EShLangGeometry, "gs", source_code, source_code_length,
prepend_header);
SHADER_HEADER, sizeof(SHADER_HEADER) - 1);
}
bool CompileFragmentShader(SPIRVCodeVector* out_code, const char* source_code,
size_t source_code_length, bool prepend_header)
{
return CompileShaderToSPV(out_code, EShLangFragment, "ps", source_code, source_code_length,
prepend_header);
SHADER_HEADER, sizeof(SHADER_HEADER) - 1);
}
bool CompileComputeShader(SPIRVCodeVector* out_code, const char* source_code,
size_t source_code_length, bool prepend_header)
{
return CompileShaderToSPV(out_code, EShLangCompute, "cs", source_code, source_code_length,
COMPUTE_SHADER_HEADER, sizeof(COMPUTE_SHADER_HEADER) - 1);
}
} // namespace ShaderCompiler