int main(int argc, char *argv[])
{
int i, j;
char ** tmp_argv;
tmp_argv = (char **) malloc(sizeof(char *) * (argc + 1));
if (tmp_argv == NULL) {
return(0);
}
/*
* assume strict order: <options, ...> <files, ...> and
* each option and its argument are specified without intervening spaces
* such as '-I/dir' or '-otmp.i' (not '-I /dir' nor '-o tmp.i').
*/
for (i = 0; i < argc; ++i) {
tmp_argv[i] = argv[i]; /* copy options */
if ( (*argv[i] != '-')
&& (*argv[i] != '/')
&& (i > 0)) {
break;
}
}
/* this works only if called function does not manipulate pointer array! */
/*
* Note that mcpp no longer uses freopen() since 2008/04/20, so you can
* output multiple input to different files, though this sample output
* to stdout, which may be redirected.
*/
for (j = i; i < argc; ++i) {
int retval;
char * result;
clock_t start, finish;
tmp_argv[j] = argv[i]; /* process each file */
fprintf(stderr, "\n%s\n", argv[i]);
start = clock(); /* get start time */
#if OUT2MEM /* Use memory buffer */
mcpp_use_mem_buffers( 1); /* enable memory output */
retval = mcpp_lib_main(j + 1, tmp_argv); /* call MCPP */
result = mcpp_get_mem_buffer( OUT); /* get the output */
if (result)
fputs( result, stdout);
result = mcpp_get_mem_buffer( ERR); /* get the diagnostics */
if (result)
fputs( result, stderr);
#if 0 /* debug output is the same with normal output by default */
result = mcpp_get_mem_buffer( DBG); /* get the debug output */
if (result)
fputs( result, stdout); /* appended to output */
#endif
#else /* Normal output to file */
retval = mcpp_lib_main(j + 1, tmp_argv);
#endif
finish = clock(); /* get finish time */
fprintf(stderr, "\nReturned status:%d, Elapsed time: %.3f seconds.\n",
retval, (double)(finish - start) / (double)CLOCKS_PER_SEC);
}
free(tmp_argv);
return(0);
}
// ------------------------------------------------------------------------------------------
//! Generates the HLSL shader Byte code.
//! @param ShaderByteCodeOutputStream Output for the shader code.
//! @param ShaderParsedData Parsed shader data, produced by @ref HLSLParser
//! @param ShaderType Type of the shader to generate code.
//! @param ShaderEntryName Name of the shader entry point.
//! @param ShaderTargetPlatform Target platform for the GLSL code.
void GLSLCompiler::GenerateAndCompileShader(UniquePtr<OutputStream> const& ShaderByteCodeOutputStream
, HLSLScope const* const ShaderParsedData, IGraphicsShaderType const ShaderType, String const& ShaderEntryName
, DHLSLShaderCrossCompilerTarget const ShaderTargetPlatform)
{
StringBuilder GLSLGeneratorBuilder;
GLSLGenerator().GenerateShader(GLSLGeneratorBuilder, ShaderParsedData, ShaderEntryName, ShaderTargetPlatform, ShaderType);
// Now we need just preprocess generated code to reduce loading time.
StringBuilder GLSLPreprocessedBuilder;
GLSLPreprocessedBuilder.Append(GLSLInsertations::GLSLCopyright);
GLSLPreprocessedBuilder.Append(GLSLInsertations::GLSLPreambule[ShaderTargetPlatform - DHLSL_CC_TARGET_GLSL430]);
// We use MCPP preprocessor because it is faster than our one.
//! @todo Implement temporary files access here.
String const MCPPSourceFilePath = "a.tmp";// Path::GetTemporaryFileName();
String const MCPPOutputFilePath = "b.tmp";// Path::GetTemporaryFileName();
CStr const MCPPArguments[] = { nullptr, "-P", MCPPSourceFilePath.CStr(), MCPPOutputFilePath.CStr() };
// Saving output to some temporary file to make is accessible from MCPP
FileOutputStream MCPPSourceFile(/*MCPPSourceFilePath*/L"a.tmp");
MCPPSourceFile.Write(GLSLGeneratorBuilder.CStr(), GLSLGeneratorBuilder.GetLength(), sizeof(Char));
MCPPSourceFile.Close();
{
// MCPP is not thread-safe.
// CriticalSection static MCPPCriticalSection;
// ScopedCriticalSection MCPPLock(MCPPCriticalSection);
int const MCPPResult = mcpp_lib_main(GD_ARRAY_LENGTH(MCPPArguments), const_cast<char**>(&MCPPArguments[0]));
GD_DEBUG_ASSERT(MCPPResult == 0, "Failed to preprocess shader source.");
}
// Reading MCPP result.
{
FileInputStream MCPPOutputFile(/*MCPPOutputFilePath*/L"b.tmp");
SizeTp const GLSLPreprocessedBuilderPos = GLSLPreprocessedBuilder.GetLength();
GLSLPreprocessedBuilder.Resize(GLSLPreprocessedBuilder.GetLength() + (UInt32) MCPPOutputFile.GetLength());
MCPPOutputFile.Read(GLSLPreprocessedBuilder.CStr() + GLSLPreprocessedBuilderPos, MCPPOutputFile.GetLength(), 1);
MCPPOutputFile.Close();
GLSLPreprocessedBuilder.Append('\0');
GD_DEBUG_ASSERT(::remove(MCPPSourceFilePath.CStr()) == 0, "Failed to remove mcpp source file.");
GD_DEBUG_ASSERT(::remove(MCPPOutputFilePath.CStr()) == 0, "Failed to remove mcpp output file.");
}
// Trying to optimize the GLSL code..
StringBuilder GLSLOptimizerBuilder;
/**/if (ShaderTargetPlatform != DHLSL_CC_TARGET_GLSL430 // glsl_optimizer supports only desktop GLSL 140 version. We are using 430...
&& (ShaderType != IGRAPHICS_SHADER_TYPE_VERTEX && ShaderType != IGRAPHICS_SHADER_TYPE_PIXEL)) // glsl_optimizer supports only vertex and pixel shaders...
{
// Optimizing is supported for this shader type and target.
glslopt_target static const IGraphicsGLSLangTargetsTable[] = {
/* DHLSL_CC_TARGET_GLSL430 */ kGlslTargetOpenGL,
/* DHLSL_CC_TARGET_GLSLES3 */ kGlslTargetOpenGLES20,
/* DHLSL_CC_TARGET_GLSLES2 */ kGlslTargetOpenGLES30,
};
glslopt_shader_type static const IGraphicsGLSLangShaderTypesTable[] = {
/* IGRAPHICS_SHADER_TYPE_VERTEX */ kGlslOptShaderVertex,
/* IGRAPHICS_SHADER_TYPE_PIXEL */ kGlslOptShaderFragment,
};
auto const OptimizerContext = glslopt_initialize(IGraphicsGLSLangTargetsTable[ShaderTargetPlatform]);
auto const OptimizedShader = glslopt_optimize(OptimizerContext, IGraphicsGLSLangShaderTypesTable[ShaderType - DHLSL_CC_TARGET_GLSL430]
, GLSLPreprocessedBuilder.CStr(), kGlslOptionSkipPreprocessor);
if (!glslopt_get_status(OptimizedShader))
{
// Shader was not optimized..
// This does not mean that our shader is incorrect, just MESA-based optimizer may not parse
#if 0 // our code correctly.
CStr const ShaderOptimizationLog = glslopt_get_log(OptimizedShader);
throw GLSLCompilerErrorException("shader optimization failed with following log: \n%s", ShaderOptimizationLog);
#endif // if 0
GLSLOptimizerBuilder = Move(GLSLPreprocessedBuilder);
}
else
{
// Shader was optimized..
GLSLOptimizerBuilder.Append(glslopt_get_output(OptimizedShader));
}
glslopt_shader_delete(OptimizedShader);
glslopt_cleanup(OptimizerContext);
}
else
{
// Shader was not optimized - using default version.
GLSLOptimizerBuilder = Move(GLSLPreprocessedBuilder);
}
// No we need to validate our shader..
TBuiltInResource static const GLSLangDefaultResources{ INT_MAX };
EShLanguage static const IGraphicsGLSLangShaderTypesTable[IGRAPHICS_SHADER_TYPES_COUNT] = {
/* IGRAPHICS_SHADER_TYPE_VERTEX */ EShLangVertex,
/* IGRAPHICS_SHADER_TYPE_PIXEL */ EShLangFragment,
/* IGRAPHICS_SHADER_TYPE_GEOMETRY */ EShLangGeometry,
/* IGRAPHICS_SHADER_TYPE_HULL */ EShLangTessControl,
/* IGRAPHICS_SHADER_TYPE_DOMAIN */ EShLangTessEvaluation,
/* IGRAPHICS_SHADER_TYPE_COMPUTE */ EShLangCompute,
/* IGRAPHICS_SHADER_TYPE_UNKNOWN */ EShLangCount,
};
glslang::InitializeProcess();
// Trying to compile our shader..
char const* const GLSLOptimizerBuilderPtr = GLSLOptimizerBuilder.CStr();
glslang::TShader GLSLangShader(IGraphicsGLSLangShaderTypesTable[ShaderType]);
GLSLangShader.setStrings(&GLSLOptimizerBuilderPtr, 1);
if (!GLSLangShader.parse(&GLSLangDefaultResources, 100, true, EShMsgDefault))
{
// Failed to compile our shader.
throw GLSLCompilerErrorException("GLSLang compilation returned errors: \n%s\nGenerated code:\n%s", GLSLangShader.getInfoLog(), GLSLOptimizerBuilderPtr);
}
else
{
#if 0
Debug::Log(GLSLangShader.getInfoLog());
#endif // if 0
}
// Trying to link our shader program..
glslang::TProgram GLSLangProgram;
GLSLangProgram.addShader(&GLSLangShader);
if (!GLSLangProgram.link(EShMsgDefault))
{
throw GLSLCompilerErrorException("GLSLang linking returned errors: \n%s", GLSLangProgram.getInfoLog());
}
else
{
#if 0
Debug::Log(GLSLangProgram.getInfoLog());
#endif // if 0
}
glslang::FinalizeProcess();
ShaderByteCodeOutputStream->Write(GLSLOptimizerBuilder.CStr(), GLSLOptimizerBuilder.GetLength(), sizeof(Char));
}
