void ShaderD3D::parseVaryings(ShHandle compiler)
{
if (!mTranslatedSource.empty())
{
const std::vector<sh::Varying> *varyings = ShGetVaryings(compiler);
ASSERT(varyings);
mVaryings = *varyings;
for (size_t varyingIndex = 0; varyingIndex < varyings->size(); varyingIndex++)
{
mPackedVaryings.push_back(PackedVarying(mVaryings[varyingIndex]));
}
mUsesMultipleRenderTargets = mTranslatedSource.find("GL_USES_MRT") != std::string::npos;
mUsesFragColor = mTranslatedSource.find("GL_USES_FRAG_COLOR") != std::string::npos;
mUsesFragData = mTranslatedSource.find("GL_USES_FRAG_DATA") != std::string::npos;
mUsesFragCoord = mTranslatedSource.find("GL_USES_FRAG_COORD") != std::string::npos;
mUsesFrontFacing = mTranslatedSource.find("GL_USES_FRONT_FACING") != std::string::npos;
mUsesPointSize = mTranslatedSource.find("GL_USES_POINT_SIZE") != std::string::npos;
mUsesPointCoord = mTranslatedSource.find("GL_USES_POINT_COORD") != std::string::npos;
mUsesDepthRange = mTranslatedSource.find("GL_USES_DEPTH_RANGE") != std::string::npos;
mUsesFragDepth = mTranslatedSource.find("GL_USES_FRAG_DEPTH") != std::string::npos;
mUsesDiscardRewriting = mTranslatedSource.find("ANGLE_USES_DISCARD_REWRITING") != std::string::npos;
mUsesNestedBreak = mTranslatedSource.find("ANGLE_USES_NESTED_BREAK") != std::string::npos;
mUsesDeferredInit = mTranslatedSource.find("ANGLE_USES_DEFERRED_INIT") != std::string::npos;
mRequiresIEEEStrictCompiling = mTranslatedSource.find("ANGLE_REQUIRES_IEEE_STRICT_COMPILING") != std::string::npos;
}
}
static bool getSymbolInfo(ShHandle compiler, ANGLEShaderSymbolType symbolType, Vector<ANGLEShaderSymbol>& symbols)
{
switch (symbolType) {
case SHADER_SYMBOL_TYPE_UNIFORM: {
auto uniforms = ShGetUniforms(compiler);
if (!uniforms)
return false;
for (const auto& uniform : *uniforms)
getSymbolInfo(uniform, symbolType, symbols);
break;
}
case SHADER_SYMBOL_TYPE_VARYING: {
auto varyings = ShGetVaryings(compiler);
if (!varyings)
return false;
for (const auto& varying : *varyings)
getSymbolInfo(varying, symbolType, symbols);
break;
}
case SHADER_SYMBOL_TYPE_ATTRIBUTE: {
auto attributes = ShGetAttributes(compiler);
if (!attributes)
return false;
for (const auto& attribute : *attributes)
getSymbolInfo(attribute, symbolType, symbols);
break;
}
default:
ASSERT_NOT_REACHED();
return false;
}
return true;
}
void ShaderD3D::parseVaryings(void *compiler)
{
if (!mHlsl.empty())
{
const std::vector<sh::Varying> *varyings = ShGetVaryings(compiler);
ASSERT(varyings);
for (size_t varyingIndex = 0; varyingIndex < varyings->size(); varyingIndex++)
{
mVaryings.push_back(gl::PackedVarying((*varyings)[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;
}
}
bool
ShaderValidator::FindVaryingMappedNameByUserName(const std::string& userName,
const std::string** const out_mappedName) const
{
const std::vector<sh::Varying>& attribs = *ShGetVaryings(mHandle);
for (auto itr = attribs.begin(); itr != attribs.end(); ++itr) {
if (itr->name == userName) {
*out_mappedName = &(itr->mappedName);
return true;
}
}
return false;
}
bool
ShaderValidator::FindVaryingByMappedName(const std::string& mappedName,
std::string* const out_userName,
bool* const out_isArray) const
{
const std::vector<sh::Varying>& varyings = *ShGetVaryings(mHandle);
for (auto itr = varyings.begin(); itr != varyings.end(); ++itr) {
const sh::ShaderVariable* found;
if (!itr->findInfoByMappedName(mappedName, &found, out_userName))
continue;
*out_isArray = found->isArray();
return true;
}
return false;
}
static void PrintActiveVariables(ShHandle compiler)
{
const std::vector<sh::Uniform> *uniforms = ShGetUniforms(compiler);
const std::vector<sh::Varying> *varyings = ShGetVaryings(compiler);
const std::vector<sh::Attribute> *attributes = ShGetAttributes(compiler);
for (size_t varCategory = 0; varCategory < 3; ++varCategory)
{
size_t numVars = 0;
std::string varCategoryName;
if (varCategory == 0)
{
numVars = uniforms->size();
varCategoryName = "uniform";
}
else if (varCategory == 1)
{
numVars = varyings->size();
varCategoryName = "varying";
}
else
{
numVars = attributes->size();
varCategoryName = "attribute";
}
for (size_t i = 0; i < numVars; ++i)
{
const sh::ShaderVariable *var;
if (varCategory == 0)
var = &((*uniforms)[i]);
else if (varCategory == 1)
var = &((*varyings)[i]);
else
var = &((*attributes)[i]);
PrintVariable(varCategoryName, i, *var);
}
printf("\n");
}
}
bool
ShaderValidator::CanLinkTo(const ShaderValidator* prev, nsCString* const out_log) const
{
if (!prev) {
nsPrintfCString error("Passed in NULL prev ShaderValidator.");
*out_log = error;
return false;
}
{
const std::vector<sh::Uniform>* vertPtr = ShGetUniforms(prev->mHandle);
const std::vector<sh::Uniform>* fragPtr = ShGetUniforms(mHandle);
if (!vertPtr || !fragPtr) {
nsPrintfCString error("Could not create uniform list.");
*out_log = error;
return false;
}
for (auto itrFrag = fragPtr->begin(); itrFrag != fragPtr->end(); ++itrFrag) {
for (auto itrVert = vertPtr->begin(); itrVert != vertPtr->end(); ++itrVert) {
if (itrVert->name != itrFrag->name)
continue;
if (!itrVert->isSameUniformAtLinkTime(*itrFrag)) {
nsPrintfCString error("Uniform `%s`is not linkable between"
" attached shaders.",
itrFrag->name.c_str());
*out_log = error;
return false;
}
break;
}
}
}
{
const std::vector<sh::Varying>* vertPtr = ShGetVaryings(prev->mHandle);
const std::vector<sh::Varying>* fragPtr = ShGetVaryings(mHandle);
if (!vertPtr || !fragPtr) {
nsPrintfCString error("Could not create varying list.");
*out_log = error;
return false;
}
nsTArray<ShVariableInfo> staticUseVaryingList;
for (auto itrFrag = fragPtr->begin(); itrFrag != fragPtr->end(); ++itrFrag) {
const ShVariableInfo varInfo = { itrFrag->type,
(int)itrFrag->elementCount() };
static const char prefix[] = "gl_";
if (StartsWith(itrFrag->name, prefix)) {
if (itrFrag->staticUse)
staticUseVaryingList.AppendElement(varInfo);
continue;
}
bool definedInVertShader = false;
bool staticVertUse = false;
for (auto itrVert = vertPtr->begin(); itrVert != vertPtr->end(); ++itrVert) {
if (itrVert->name != itrFrag->name)
continue;
if (!itrVert->isSameVaryingAtLinkTime(*itrFrag)) {
nsPrintfCString error("Varying `%s`is not linkable between"
" attached shaders.",
itrFrag->name.c_str());
*out_log = error;
return false;
}
definedInVertShader = true;
staticVertUse = itrVert->staticUse;
break;
}
if (!definedInVertShader && itrFrag->staticUse) {
nsPrintfCString error("Varying `%s` has static-use in the frag"
" shader, but is undeclared in the vert"
" shader.", itrFrag->name.c_str());
*out_log = error;
return false;
}
if (staticVertUse && itrFrag->staticUse)
staticUseVaryingList.AppendElement(varInfo);
}
if (!ShCheckVariablesWithinPackingLimits(mMaxVaryingVectors,
staticUseVaryingList.Elements(),
staticUseVaryingList.Length()))
{
*out_log = "Statically used varyings do not fit within packing limits. (see"
" GLSL ES Specification 1.0.17, p111)";
return false;
}
}
return true;
}
bool
ShaderValidator::CanLinkTo(const ShaderValidator* prev, nsCString* const out_log) const
{
if (!prev) {
nsPrintfCString error("Passed in NULL prev ShaderValidator.");
*out_log = error;
return false;
}
const auto shaderVersion = ShGetShaderVersion(mHandle);
if (ShGetShaderVersion(prev->mHandle) != shaderVersion) {
nsPrintfCString error("Vertex shader version %d does not match"
" fragment shader version %d.",
ShGetShaderVersion(prev->mHandle),
ShGetShaderVersion(mHandle));
*out_log = error;
return false;
}
{
const std::vector<sh::Uniform>* vertPtr = ShGetUniforms(prev->mHandle);
const std::vector<sh::Uniform>* fragPtr = ShGetUniforms(mHandle);
if (!vertPtr || !fragPtr) {
nsPrintfCString error("Could not create uniform list.");
*out_log = error;
return false;
}
for (auto itrFrag = fragPtr->begin(); itrFrag != fragPtr->end(); ++itrFrag) {
for (auto itrVert = vertPtr->begin(); itrVert != vertPtr->end(); ++itrVert) {
if (itrVert->name != itrFrag->name)
continue;
if (!itrVert->isSameUniformAtLinkTime(*itrFrag)) {
nsPrintfCString error("Uniform `%s` is not linkable between"
" attached shaders.",
itrFrag->name.c_str());
*out_log = error;
return false;
}
break;
}
}
}
{
const auto vertVars = sh::GetInterfaceBlocks(prev->mHandle);
const auto fragVars = sh::GetInterfaceBlocks(mHandle);
if (!vertVars || !fragVars) {
nsPrintfCString error("Could not create uniform block list.");
*out_log = error;
return false;
}
for (const auto& fragVar : *fragVars) {
for (const auto& vertVar : *vertVars) {
if (vertVar.name != fragVar.name)
continue;
if (!vertVar.isSameInterfaceBlockAtLinkTime(fragVar)) {
nsPrintfCString error("Interface block `%s` is not linkable between"
" attached shaders.",
fragVar.name.c_str());
*out_log = error;
return false;
}
break;
}
}
}
const auto& vertVaryings = ShGetVaryings(prev->mHandle);
const auto& fragVaryings = ShGetVaryings(mHandle);
if (!vertVaryings || !fragVaryings) {
nsPrintfCString error("Could not create varying list.");
*out_log = error;
return false;
}
{
std::vector<sh::ShaderVariable> staticUseVaryingList;
for (const auto& fragVarying : *fragVaryings) {
static const char prefix[] = "gl_";
if (StartsWith(fragVarying.name, prefix)) {
if (fragVarying.staticUse) {
staticUseVaryingList.push_back(fragVarying);
}
continue;
}
bool definedInVertShader = false;
bool staticVertUse = false;
for (const auto& vertVarying : *vertVaryings) {
if (vertVarying.name != fragVarying.name)
continue;
if (!vertVarying.isSameVaryingAtLinkTime(fragVarying, shaderVersion)) {
nsPrintfCString error("Varying `%s`is not linkable between"
" attached shaders.",
fragVarying.name.c_str());
*out_log = error;
return false;
}
definedInVertShader = true;
staticVertUse = vertVarying.staticUse;
break;
}
if (!definedInVertShader && fragVarying.staticUse) {
nsPrintfCString error("Varying `%s` has static-use in the frag"
" shader, but is undeclared in the vert"
" shader.", fragVarying.name.c_str());
*out_log = error;
return false;
}
if (staticVertUse && fragVarying.staticUse) {
staticUseVaryingList.push_back(fragVarying);
}
}
if (!ShCheckVariablesWithinPackingLimits(mMaxVaryingVectors,
staticUseVaryingList))
{
*out_log = "Statically used varyings do not fit within packing limits. (see"
" GLSL ES Specification 1.0.17, p111)";
return false;
}
}
if (shaderVersion == 100) {
// Enforce ESSL1 invariant linking rules.
bool isInvariant_Position = false;
bool isInvariant_PointSize = false;
bool isInvariant_FragCoord = false;
bool isInvariant_PointCoord = false;
for (const auto& varying : *vertVaryings) {
if (varying.name == "gl_Position") {
isInvariant_Position = varying.isInvariant;
} else if (varying.name == "gl_PointSize") {
isInvariant_PointSize = varying.isInvariant;
}
}
for (const auto& varying : *fragVaryings) {
if (varying.name == "gl_FragCoord") {
isInvariant_FragCoord = varying.isInvariant;
} else if (varying.name == "gl_PointCoord") {
isInvariant_PointCoord = varying.isInvariant;
}
}
////
const auto fnCanBuiltInsLink = [](bool vertIsInvariant, bool fragIsInvariant) {
if (vertIsInvariant)
return true;
return !fragIsInvariant;
};
if (!fnCanBuiltInsLink(isInvariant_Position, isInvariant_FragCoord)) {
*out_log = "gl_Position must be invariant if gl_FragCoord is. (see GLSL ES"
" Specification 1.0.17, p39)";
return false;
}
if (!fnCanBuiltInsLink(isInvariant_PointSize, isInvariant_PointCoord)) {
*out_log = "gl_PointSize must be invariant if gl_PointCoord is. (see GLSL ES"
" Specification 1.0.17, p39)";
return false;
}
}
return true;
}
void Shader::compile(Compiler *compiler)
{
mData.mTranslatedSource.clear();
mInfoLog.clear();
mData.mShaderVersion = 100;
mData.mVaryings.clear();
mData.mUniforms.clear();
mData.mInterfaceBlocks.clear();
mData.mActiveAttributes.clear();
mData.mActiveOutputVariables.clear();
ShHandle compilerHandle = compiler->getCompilerHandle(mData.mShaderType);
std::stringstream sourceStream;
std::string sourcePath;
int additionalOptions =
mImplementation->prepareSourceAndReturnOptions(&sourceStream, &sourcePath);
int compileOptions = (SH_OBJECT_CODE | SH_VARIABLES | additionalOptions);
// Some targets (eg D3D11 Feature Level 9_3 and below) do not support non-constant loop indexes
// in fragment shaders. Shader compilation will fail. To provide a better error message we can
// instruct the compiler to pre-validate.
if (mRendererLimitations.shadersRequireIndexedLoopValidation)
{
compileOptions |= SH_VALIDATE_LOOP_INDEXING;
}
std::string sourceString = sourceStream.str();
std::vector<const char *> sourceCStrings;
if (!sourcePath.empty())
{
sourceCStrings.push_back(sourcePath.c_str());
}
sourceCStrings.push_back(sourceString.c_str());
bool result =
ShCompile(compilerHandle, &sourceCStrings[0], sourceCStrings.size(), compileOptions);
if (!result)
{
mInfoLog = ShGetInfoLog(compilerHandle);
TRACE("\n%s", mInfoLog.c_str());
mCompiled = false;
return;
}
mData.mTranslatedSource = ShGetObjectCode(compilerHandle);
#ifndef NDEBUG
// Prefix translated shader with commented out un-translated shader.
// Useful in diagnostics tools which capture the shader source.
std::ostringstream shaderStream;
shaderStream << "// GLSL\n";
shaderStream << "//\n";
size_t curPos = 0;
while (curPos != std::string::npos)
{
size_t nextLine = mData.mSource.find("\n", curPos);
size_t len = (nextLine == std::string::npos) ? std::string::npos : (nextLine - curPos + 1);
shaderStream << "// " << mData.mSource.substr(curPos, len);
curPos = (nextLine == std::string::npos) ? std::string::npos : (nextLine + 1);
}
shaderStream << "\n\n";
shaderStream << mData.mTranslatedSource;
mData.mTranslatedSource = shaderStream.str();
#endif
// Gather the shader information
mData.mShaderVersion = ShGetShaderVersion(compilerHandle);
mData.mVaryings = GetShaderVariables(ShGetVaryings(compilerHandle));
mData.mUniforms = GetShaderVariables(ShGetUniforms(compilerHandle));
mData.mInterfaceBlocks = GetShaderVariables(ShGetInterfaceBlocks(compilerHandle));
if (mData.mShaderType == GL_VERTEX_SHADER)
{
mData.mActiveAttributes = GetActiveShaderVariables(ShGetAttributes(compilerHandle));
}
else
{
ASSERT(mData.mShaderType == GL_FRAGMENT_SHADER);
// TODO(jmadill): Figure out why we only sort in the FS, and if we need to.
std::sort(mData.mVaryings.begin(), mData.mVaryings.end(), CompareShaderVar);
mData.mActiveOutputVariables =
GetActiveShaderVariables(ShGetOutputVariables(compilerHandle));
}
ASSERT(!mData.mTranslatedSource.empty());
mCompiled = mImplementation->postTranslateCompile(compiler, &mInfoLog);
}