bool
WebGLProgram::ValidateAfterTentativeLink(nsCString* const out_linkLog) const
{
const auto& linkInfo = mMostRecentLinkInfo;
// Check if the attrib name conflicting to uniform name
for (const auto& attrib : linkInfo->attribs) {
const auto& attribName = attrib.mActiveInfo->mBaseUserName;
for (const auto& uniform : linkInfo->uniforms) {
const auto& uniformName = uniform->mActiveInfo->mBaseUserName;
if (attribName == uniformName) {
*out_linkLog = nsPrintfCString("Attrib name conflicts with uniform name:"
" %s",
attribName.BeginReading());
return false;
}
}
}
std::map<uint32_t, const webgl::AttribInfo*> attribsByLoc;
for (const auto& attrib : linkInfo->attribs) {
const auto& elemType = attrib.mActiveInfo->mElemType;
const auto numUsedLocs = NumUsedLocationsByElemType(elemType);
for (uint32_t i = 0; i < numUsedLocs; i++) {
const uint32_t usedLoc = attrib.mLoc + i;
const auto res = attribsByLoc.insert({usedLoc, &attrib});
const bool& didInsert = res.second;
if (!didInsert) {
const auto& aliasingName = attrib.mActiveInfo->mBaseUserName;
const auto& itrExisting = res.first;
const auto& existingInfo = itrExisting->second;
const auto& existingName = existingInfo->mActiveInfo->mBaseUserName;
*out_linkLog = nsPrintfCString("Attrib \"%s\" aliases locations used by"
" attrib \"%s\".",
aliasingName.BeginReading(),
existingName.BeginReading());
return false;
}
}
}
return true;
}
bool
WebGLProgram::ValidateAfterTentativeLink(nsCString* const out_linkLog) const
{
const auto& linkInfo = mMostRecentLinkInfo;
const auto& gl = mContext->gl;
// Check if the attrib name conflicting to uniform name
for (const auto& attrib : linkInfo->attribs) {
const auto& attribName = attrib.mActiveInfo->mBaseUserName;
for (const auto& uniform : linkInfo->uniforms) {
const auto& uniformName = uniform->mActiveInfo->mBaseUserName;
if (attribName == uniformName) {
*out_linkLog = nsPrintfCString("Attrib name conflicts with uniform name:"
" %s",
attribName.BeginReading());
return false;
}
}
}
std::map<uint32_t, const webgl::AttribInfo*> attribsByLoc;
for (const auto& attrib : linkInfo->attribs) {
const auto& elemType = attrib.mActiveInfo->mElemType;
const auto numUsedLocs = NumUsedLocationsByElemType(elemType);
for (uint32_t i = 0; i < numUsedLocs; i++) {
const uint32_t usedLoc = attrib.mLoc + i;
const auto res = attribsByLoc.insert({usedLoc, &attrib});
const bool& didInsert = res.second;
if (!didInsert) {
const auto& aliasingName = attrib.mActiveInfo->mBaseUserName;
const auto& itrExisting = res.first;
const auto& existingInfo = itrExisting->second;
const auto& existingName = existingInfo->mActiveInfo->mBaseUserName;
*out_linkLog = nsPrintfCString("Attrib \"%s\" aliases locations used by"
" attrib \"%s\".",
aliasingName.BeginReading(),
existingName.BeginReading());
return false;
}
}
}
// Forbid:
// * Unrecognized varying name
// * Duplicate varying name
// * Too many components for specified buffer mode
if (mNextLink_TransformFeedbackVaryings.size()) {
GLuint maxComponentsPerIndex = 0;
switch (mNextLink_TransformFeedbackBufferMode) {
case LOCAL_GL_INTERLEAVED_ATTRIBS:
gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS,
&maxComponentsPerIndex);
break;
case LOCAL_GL_SEPARATE_ATTRIBS:
gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS,
&maxComponentsPerIndex);
break;
default:
MOZ_CRASH("`bufferMode`");
}
std::vector<size_t> componentsPerVert;
std::set<const WebGLActiveInfo*> alreadyUsed;
for (const auto& wideUserName : mNextLink_TransformFeedbackVaryings) {
if (!componentsPerVert.size() ||
mNextLink_TransformFeedbackBufferMode == LOCAL_GL_SEPARATE_ATTRIBS)
{
componentsPerVert.push_back(0);
}
////
const WebGLActiveInfo* curInfo = nullptr;
for (const auto& info : linkInfo->transformFeedbackVaryings) {
const NS_ConvertASCIItoUTF16 info_wideUserName(info->mBaseUserName);
if (info_wideUserName == wideUserName) {
curInfo = info.get();
break;
}
}
if (!curInfo) {
const NS_LossyConvertUTF16toASCII asciiUserName(wideUserName);
*out_linkLog = nsPrintfCString("Transform feedback varying \"%s\" not"
" found.",
asciiUserName.BeginReading());
return false;
}
const auto insertResPair = alreadyUsed.insert(curInfo);
const auto& didInsert = insertResPair.second;
if (!didInsert) {
const NS_LossyConvertUTF16toASCII asciiUserName(wideUserName);
*out_linkLog = nsPrintfCString("Transform feedback varying \"%s\""
" specified twice.",
asciiUserName.BeginReading());
return false;
}
////
size_t varyingComponents = NumComponents(curInfo->mElemType);
varyingComponents *= curInfo->mElemCount;
auto& totalComponentsForIndex = *(componentsPerVert.rbegin());
totalComponentsForIndex += varyingComponents;
if (totalComponentsForIndex > maxComponentsPerIndex) {
const NS_LossyConvertUTF16toASCII asciiUserName(wideUserName);
*out_linkLog = nsPrintfCString("Transform feedback varying \"%s\""
" pushed `componentsForIndex` over the"
" limit of %u.",
asciiUserName.BeginReading(),
maxComponentsPerIndex);
return false;
}
}
linkInfo->componentsPerTFVert.swap(componentsPerVert);
}
return true;
}
