void Shader::parseVaryings(void *compiler)
{
if (!mHlsl.empty())
{
std::vector<Varying> *activeVaryings;
ShGetInfoPointer(compiler, SH_ACTIVE_VARYINGS_ARRAY, reinterpret_cast<void**>(&activeVaryings));
for (size_t varyingIndex = 0; varyingIndex < activeVaryings->size(); varyingIndex++)
{
mVaryings.push_back(PackedVarying((*activeVaryings)[varyingIndex]));
}
mUsesMultipleRenderTargets = mHlsl.find("GL_USES_MRT") != std::string::npos;
mUsesFragColor = mHlsl.find("GL_USES_FRAG_COLOR") != std::string::npos;
mUsesFragData = mHlsl.find("GL_USES_FRAG_DATA") != std::string::npos;
mUsesFragCoord = mHlsl.find("GL_USES_FRAG_COORD") != std::string::npos;
mUsesFrontFacing = mHlsl.find("GL_USES_FRONT_FACING") != std::string::npos;
mUsesPointSize = mHlsl.find("GL_USES_POINT_SIZE") != std::string::npos;
mUsesPointCoord = mHlsl.find("GL_USES_POINT_COORD") != std::string::npos;
mUsesDepthRange = mHlsl.find("GL_USES_DEPTH_RANGE") != std::string::npos;
mUsesFragDepth = mHlsl.find("GL_USES_FRAG_DEPTH") != std::string::npos;
mUsesDiscardRewriting = mHlsl.find("ANGLE_USES_DISCARD_REWRITING") != std::string::npos;
mUsesNestedBreak = mHlsl.find("ANGLE_USES_NESTED_BREAK") != std::string::npos;
}
}
void Shader::compileToHLSL(void *compiler)
{
// ensure we don't pass a NULL source to the compiler
const char *source = "\0";
if (mSource)
{
source = mSource;
}
// ensure the compiler is loaded
initializeCompiler();
int compileOptions = SH_OBJECT_CODE;
std::string sourcePath;
if (perfActive())
{
sourcePath = "";
writeFile(sourcePath.c_str(), source, strlen(source));
compileOptions |= SH_LINE_DIRECTIVES;
}
int result;
if (sourcePath.empty())
{
result = ShCompile(compiler, &source, 1, compileOptions);
}
else
{
const char* sourceStrings[2] =
{
sourcePath.c_str(),
source
};
result = ShCompile(compiler, sourceStrings, 2, compileOptions | SH_SOURCE_PATH);
}
if (result)
{
size_t objCodeLen = 0;
ShGetInfo(compiler, SH_OBJECT_CODE_LENGTH, &objCodeLen);
mHlsl = new char[objCodeLen];
ShGetObjectCode(compiler, mHlsl);
void *activeUniforms;
ShGetInfoPointer(compiler, SH_ACTIVE_UNIFORMS_ARRAY, &activeUniforms);
mActiveUniforms = *(sh::ActiveUniforms*)activeUniforms;
}
else
{
size_t infoLogLen = 0;
ShGetInfo(compiler, SH_INFO_LOG_LENGTH, &infoLogLen);
mInfoLog = new char[infoLogLen];
ShGetInfoLog(compiler, mInfoLog);
TRACE("\n%s", mInfoLog);
}
}
void VertexShader::parseAttributes()
{
const std::string &hlsl = getHLSL();
if (!hlsl.empty())
{
void *activeAttributes;
ShGetInfoPointer(mVertexCompiler, SH_ACTIVE_ATTRIBUTES_ARRAY, &activeAttributes);
mActiveAttributes = *(std::vector<Attribute>*)activeAttributes;
}
}
void FragmentShader::compile()
{
uncompile();
compileToHLSL(mFragmentCompiler);
parseVaryings(mFragmentCompiler);
std::sort(mVaryings.begin(), mVaryings.end(), compareVarying);
const std::string &hlsl = getHLSL();
if (!hlsl.empty())
{
void *activeOutputVariables;
ShGetInfoPointer(mFragmentCompiler, SH_ACTIVE_OUTPUT_VARIABLES_ARRAY, &activeOutputVariables);
mActiveOutputVariables = *(std::vector<Attribute>*)activeOutputVariables;
}
}
void Shader::compileToHLSL(void *compiler)
{
// ensure the compiler is loaded
initializeCompiler();
int compileOptions = SH_OBJECT_CODE;
std::string sourcePath;
if (perfActive())
{
sourcePath = getTempPath();
writeFile(sourcePath.c_str(), mSource.c_str(), mSource.length());
compileOptions |= SH_LINE_DIRECTIVES;
}
int result;
if (sourcePath.empty())
{
const char* sourceStrings[] =
{
mSource.c_str(),
};
result = ShCompile(compiler, sourceStrings, ArraySize(sourceStrings), compileOptions);
}
else
{
const char* sourceStrings[] =
{
sourcePath.c_str(),
mSource.c_str(),
};
result = ShCompile(compiler, sourceStrings, ArraySize(sourceStrings), compileOptions | SH_SOURCE_PATH);
}
size_t shaderVersion = 100;
ShGetInfo(compiler, SH_SHADER_VERSION, &shaderVersion);
mShaderVersion = static_cast<int>(shaderVersion);
if (shaderVersion == 300 && mRenderer->getCurrentClientVersion() < 3)
{
mInfoLog = "GLSL ES 3.00 is not supported by OpenGL ES 2.0 contexts";
TRACE("\n%s", mInfoLog.c_str());
}
else if (result)
{
size_t objCodeLen = 0;
ShGetInfo(compiler, SH_OBJECT_CODE_LENGTH, &objCodeLen);
char* outputHLSL = new char[objCodeLen];
ShGetObjectCode(compiler, outputHLSL);
#ifdef _DEBUG
std::ostringstream hlslStream;
hlslStream << "// GLSL\n";
hlslStream << "//\n";
size_t curPos = 0;
while (curPos != std::string::npos)
{
size_t nextLine = mSource.find("\n", curPos);
size_t len = (nextLine == std::string::npos) ? std::string::npos : (nextLine - curPos + 1);
hlslStream << "// " << mSource.substr(curPos, len);
curPos = (nextLine == std::string::npos) ? std::string::npos : (nextLine + 1);
}
hlslStream << "\n\n";
hlslStream << outputHLSL;
mHlsl = hlslStream.str();
#else
mHlsl = outputHLSL;
#endif
delete[] outputHLSL;
void *activeUniforms;
ShGetInfoPointer(compiler, SH_ACTIVE_UNIFORMS_ARRAY, &activeUniforms);
mActiveUniforms = *(std::vector<Uniform>*)activeUniforms;
void *activeInterfaceBlocks;
ShGetInfoPointer(compiler, SH_ACTIVE_INTERFACE_BLOCKS_ARRAY, &activeInterfaceBlocks);
mActiveInterfaceBlocks = *(std::vector<InterfaceBlock>*)activeInterfaceBlocks;
}
else
{
size_t infoLogLen = 0;
ShGetInfo(compiler, SH_INFO_LOG_LENGTH, &infoLogLen);
char* infoLog = new char[infoLogLen];
ShGetInfoLog(compiler, infoLog);
mInfoLog = infoLog;
TRACE("\n%s", mInfoLog.c_str());
}
}
