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// glslang.cpp
#include "glslang.h"
#include "StandAlone/ResourceLimits.h"
#include "StandAlone/Worklist.h"
#include "glslang/Include/ShHandle.h"
#include "glslang/Include/revision.h"
#include "glslang/Public/ShaderLang.h"
#include "SPIRV/GlslangToSpv.h"
#include "SPIRV/GLSL.std.450.h"
#include "SPIRV/doc.h"
#include "SPIRV/disassemble.h"
#include "../../Slang.h"
#if 0
#include <cstring>
#include <cstdlib>
#include <cctype>
#include <cmath>
#include <array>
#include <memory>
#include <thread>
#endif
#ifdef _WIN32
#include <Windows.h>
#endif
#include <sstream>
// This is a wrapper to allow us to run the `glslang` compiler
// in a controlled fashion.
#define UNLIMITED 9999
static TBuiltInResource gResources =
{
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED, UNLIMITED,
UNLIMITED, UNLIMITED, UNLIMITED,
{ true, true, true, true, true, true, true, true, true, }
};
static void dump(
std::string const& text,
glslang_OutputFunc outputFunc,
void* outputUserData,
FILE* fallbackStream)
{
if( outputFunc )
{
outputFunc(text.c_str(), outputUserData);
}
else
{
fprintf(fallbackStream, "%s", text.c_str());
// also output it for debug purposes
OutputDebugStringA(text.c_str());
}
}
static void dumpDiagnostics(
glslang_CompileRequest* request,
std::string const& log)
{
dump(log, request->diagnosticFunc, request->diagnosticUserData, stderr);
}
extern "C"
_declspec(dllexport)
int glslang_compile(glslang_CompileRequest* request)
{
glslang::InitializeProcess();
EShLanguage glslangStage;
switch( request->slangStage )
{
#define CASE(SP, GL) case SLANG_STAGE_##SP: glslangStage = EShLang##GL; break
CASE(VERTEX, Vertex);
CASE(FRAGMENT, Fragment);
CASE(GEOMETRY, Geometry);
CASE(HULL, TessControl);
CASE(DOMAIN, TessEvaluation);
CASE(COMPUTE, Compute);
#undef CASE
default:
return 1;
}
// TODO: compute glslang stage to use
glslang::TShader* shader = new glslang::TShader(glslangStage);
auto shaderPtr = std::unique_ptr<glslang::TShader>(shader);
glslang::TProgram* program = new glslang::TProgram();
auto programPtr = std::unique_ptr<glslang::TProgram>(program);
int sourceTextLength = (int) strlen(request->sourceText);
shader->setPreamble("#extension GL_GOOGLE_cpp_style_line_directive : require\n");
shader->setStringsWithLengthsAndNames(
&request->sourceText,
&sourceTextLength,
&request->sourcePath,
1);
// Note: this seems required to get past a bug where
// glslang complains about a declaration of `out gl_PerVertex`
// that it (seemingly) *should* allow according to the GLSL-for-Vulkan
// extension.
shader->setAutoMapLocations(true);
// Let's auto-map the bindings too, just because we can
shader->setAutoMapBindings(true);
EShMessages messages = EShMessages(EShMsgSpvRules | EShMsgVulkanRules);
if( !shader->parse(&gResources, 110, false, messages) )
{
dumpDiagnostics(request, shader->getInfoLog());
return 1;
}
program->addShader(shader);
if( !program->link(messages) )
{
dumpDiagnostics(request, program->getInfoLog());
return 1;
}
if( !program->mapIO() )
{
dumpDiagnostics(request, program->getInfoLog());
return 1;
}
for(int stage = 0; stage < EShLangCount; ++stage)
{
auto stageIntermediate = program->getIntermediate((EShLanguage)stage);
if(!stageIntermediate)
continue;
std::vector<unsigned int> spirv;
std::string warningsErrors;
spv::SpvBuildLogger logger;
glslang::GlslangToSpv(*stageIntermediate, spirv, &logger);
dumpDiagnostics(request, logger.getAllMessages());
std::stringstream spirvAsmStream;
spv::Disassemble(spirvAsmStream, spirv);
dump(spirvAsmStream.str(), request->outputFunc, request->outputUserData, stdout);
}
glslang::FinalizeProcess();
return 0;
}
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