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//
// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "compiler/translator/ValidateOutputs.h"
#include "compiler/translator/InfoSink.h"
#include "compiler/translator/InitializeParseContext.h"
#include "compiler/translator/ParseContext.h"
ValidateOutputs::ValidateOutputs(TInfoSinkBase& sink, int maxDrawBuffers)
: mSink(sink),
mMaxDrawBuffers(maxDrawBuffers),
mNumErrors(0),
mHasUnspecifiedOutputLocation(false)
{
}
void ValidateOutputs::visitSymbol(TIntermSymbol *symbol)
{
TString name = symbol->getSymbol();
TQualifier qualifier = symbol->getQualifier();
if (mVisitedSymbols.count(name) == 1)
return;
mVisitedSymbols.insert(name);
if (qualifier == EvqFragmentOut)
{
const TType &type = symbol->getType();
const int location = type.getLayoutQualifier().location;
if (mHasUnspecifiedOutputLocation)
{
error(symbol->getLine(), "must explicitly specify all locations when using multiple fragment outputs", name.c_str());
}
else if (location == -1)
{
mHasUnspecifiedOutputLocation = true;
}
else
{
OutputMap::iterator mapEntry = mOutputMap.find(location);
if (mapEntry == mOutputMap.end())
{
const int elementCount = type.isArray() ? type.getArraySize() : 1;
if (location + elementCount > mMaxDrawBuffers)
{
error(symbol->getLine(), "output location must be < MAX_DRAW_BUFFERS", name.c_str());
}
for (int elementIndex = 0; elementIndex < elementCount; elementIndex++)
{
const int offsetLocation = location + elementIndex;
mOutputMap[offsetLocation] = symbol;
}
}
else
{
std::stringstream strstr;
strstr << "conflicting output locations with previously defined output '"
<< mapEntry->second->getSymbol() << "'";
error(symbol->getLine(), strstr.str().c_str(), name.c_str());
}
}
}
}
void ValidateOutputs::error(TSourceLoc loc, const char *reason, const char* token)
{
mSink.prefix(EPrefixError);
mSink.location(loc);
mSink << "'" << token << "' : " << reason << "\n";
mNumErrors++;
}
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