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// slang-support.cpp
#define _CRT_SECURE_NO_WARNINGS 1
#include "slang-support.h"
#include "options.h"
#include <assert.h>
#include <stdio.h>
namespace renderer_test {
RefPtr<ShaderProgram> ShaderCompiler::compileProgram(
ShaderCompileRequest const& request)
{
SlangCompileRequest* slangRequest = spCreateCompileRequest(slangSession);
spSetCodeGenTarget(slangRequest, target);
spSetTargetProfile(slangRequest, 0,
spFindProfile(slangSession, profile));
// Define a macro so that shader code in a test can detect what language we
// are nominally working with.
char const* langDefine = nullptr;
switch (sourceLanguage)
{
case SLANG_SOURCE_LANGUAGE_GLSL:
spAddPreprocessorDefine(slangRequest, "__GLSL__", "1");
break;
case SLANG_SOURCE_LANGUAGE_SLANG:
spAddPreprocessorDefine(slangRequest, "__SLANG__", "1");
// fall through
case SLANG_SOURCE_LANGUAGE_HLSL:
spAddPreprocessorDefine(slangRequest, "__HLSL__", "1");
break;
default:
assert(!"unexpected");
break;
}
if (passThrough != SLANG_PASS_THROUGH_NONE)
{
spSetPassThrough(slangRequest, passThrough);
}
// Process any additional command-line options specified for Slang using
// the `-xslang <arg>` option to `render-test`.
SLANG_RETURN_NULL_ON_FAIL(spProcessCommandLineArguments(slangRequest, &gOptions.slangArgs[0], gOptions.slangArgCount));
int computeTranslationUnit = 0;
int vertexTranslationUnit = 0;
int fragmentTranslationUnit = 0;
char const* vertexEntryPointName = request.vertexShader.name;
char const* fragmentEntryPointName = request.fragmentShader.name;
char const* computeEntryPointName = request.computeShader.name;
if (sourceLanguage == SLANG_SOURCE_LANGUAGE_GLSL)
{
// GLSL presents unique challenges because, frankly, it got the whole
// compilation model wrong. One aspect of working around this is that
// we will compile the same source file multiple times: once per
// entry point, and we will have different preprocessor definitions
// active in each case.
vertexTranslationUnit = spAddTranslationUnit(slangRequest, sourceLanguage, nullptr);
spAddTranslationUnitSourceString(slangRequest, vertexTranslationUnit, request.source.path, request.source.dataBegin);
spTranslationUnit_addPreprocessorDefine(slangRequest, vertexTranslationUnit, "__GLSL_VERTEX__", "1");
vertexEntryPointName = "main";
fragmentTranslationUnit = spAddTranslationUnit(slangRequest, sourceLanguage, nullptr);
spAddTranslationUnitSourceString(slangRequest, fragmentTranslationUnit, request.source.path, request.source.dataBegin);
spTranslationUnit_addPreprocessorDefine(slangRequest, fragmentTranslationUnit, "__GLSL_FRAGMENT__", "1");
fragmentEntryPointName = "main";
computeTranslationUnit = spAddTranslationUnit(slangRequest, sourceLanguage, nullptr);
spAddTranslationUnitSourceString(slangRequest, computeTranslationUnit, request.source.path, request.source.dataBegin);
spTranslationUnit_addPreprocessorDefine(slangRequest, computeTranslationUnit, "__GLSL_COMPUTE__", "1");
computeEntryPointName = "main";
}
else
{
int translationUnit = spAddTranslationUnit(slangRequest, sourceLanguage, nullptr);
spAddTranslationUnitSourceString(slangRequest, translationUnit, request.source.path, request.source.dataBegin);
vertexTranslationUnit = translationUnit;
fragmentTranslationUnit = translationUnit;
computeTranslationUnit = translationUnit;
}
RefPtr<ShaderProgram> shaderProgram;
Slang::List<const char*> rawTypeNames;
for (auto typeName : request.entryPointTypeArguments)
rawTypeNames.Add(typeName.Buffer());
if (request.computeShader.name)
{
int computeEntryPoint = spAddEntryPointEx(slangRequest, computeTranslationUnit,
computeEntryPointName,
SLANG_STAGE_COMPUTE,
(int)rawTypeNames.Count(),
rawTypeNames.Buffer());
spSetLineDirectiveMode(slangRequest, SLANG_LINE_DIRECTIVE_MODE_NONE);
const SlangResult res = spCompile(slangRequest);
if (auto diagnostics = spGetDiagnosticOutput(slangRequest))
{
fprintf(stderr, "%s", diagnostics);
}
if (SLANG_SUCCEEDED(res))
{
size_t codeSize = 0;
char const* code = (char const*) spGetEntryPointCode(slangRequest, computeEntryPoint, &codeSize);
ShaderProgram::KernelDesc kernelDesc;
kernelDesc.stage = StageType::Compute;
kernelDesc.codeBegin = code;
kernelDesc.codeEnd = code + codeSize;
ShaderProgram::Desc desc;
desc.pipelineType = PipelineType::Compute;
desc.kernels = &kernelDesc;
desc.kernelCount = 1;
shaderProgram = renderer->createProgram(desc);
}
}
else
{
int vertexEntryPoint = spAddEntryPointEx(slangRequest, vertexTranslationUnit, vertexEntryPointName, SLANG_STAGE_VERTEX, (int)rawTypeNames.Count(), rawTypeNames.Buffer());
int fragmentEntryPoint = spAddEntryPointEx(slangRequest, fragmentTranslationUnit, fragmentEntryPointName, SLANG_STAGE_FRAGMENT, (int)rawTypeNames.Count(), rawTypeNames.Buffer());
const SlangResult res = spCompile(slangRequest);
if (auto diagnostics = spGetDiagnosticOutput(slangRequest))
{
// TODO(tfoley): re-enable when I get a logging solution in place
// OutputDebugStringA(diagnostics);
fprintf(stderr, "%s", diagnostics);
}
if (SLANG_SUCCEEDED(res))
{
size_t vertexCodeSize = 0;
char const* vertexCode = (char const*) spGetEntryPointCode(slangRequest, vertexEntryPoint, &vertexCodeSize);
size_t fragmentCodeSize = 0;
char const* fragmentCode = (char const*) spGetEntryPointCode(slangRequest, fragmentEntryPoint, &fragmentCodeSize);
static const int kDescCount = 2;
ShaderProgram::KernelDesc kernelDescs[kDescCount];
kernelDescs[0].stage = StageType::Vertex;
kernelDescs[0].codeBegin = vertexCode;
kernelDescs[0].codeEnd = vertexCode + vertexCodeSize;
kernelDescs[1].stage = StageType::Fragment;
kernelDescs[1].codeBegin = fragmentCode;
kernelDescs[1].codeEnd = fragmentCode + fragmentCodeSize;
ShaderProgram::Desc desc;
desc.pipelineType = PipelineType::Graphics;
desc.kernels = &kernelDescs[0];
desc.kernelCount = kDescCount;
shaderProgram = renderer->createProgram(desc);
}
}
// We clean up the Slang compilation context and result *after*
// we have run the downstream compiler, because Slang
// owns the memory allocation for the generated text, and will
// free it when we destroy the compilation result.
spDestroyCompileRequest(slangRequest);
return shaderProgram;
}
} // renderer_test
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