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//
// Copyright (c) 2002-2010 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.
//
// UnfoldSelect is an AST traverser to output the select operator ?: as if-else statements
//
#include "compiler/UnfoldSelect.h"
#include "compiler/InfoSink.h"
#include "compiler/OutputHLSL.h"
namespace sh
{
UnfoldSelect::UnfoldSelect(TParseContext &context, OutputHLSL *outputHLSL) : mContext(context), mOutputHLSL(outputHLSL)
{
mTemporaryIndex = 0;
}
void UnfoldSelect::traverse(TIntermNode *node)
{
mTemporaryIndex++;
node->traverse(this);
}
bool UnfoldSelect::visitSelection(Visit visit, TIntermSelection *node)
{
TInfoSinkBase &out = mOutputHLSL->getBodyStream();
if (node->usesTernaryOperator())
{
int i = mTemporaryIndex++;
out << mOutputHLSL->typeString(node->getType()) << " t" << i << ";\n";
node->getCondition()->traverse(this);
out << "if(";
node->getCondition()->traverse(mOutputHLSL);
out << ")\n"
"{\n";
node->getTrueBlock()->traverse(this);
out << " t" << i << " = ";
node->getTrueBlock()->traverse(mOutputHLSL);
out << ";\n"
"}\n"
"else\n"
"{\n";
node->getFalseBlock()->traverse(this);
out << " t" << i << " = ";
node->getFalseBlock()->traverse(mOutputHLSL);
out << ";\n"
"}\n";
mTemporaryIndex--;
}
return false;
}
int UnfoldSelect::getTemporaryIndex()
{
return mTemporaryIndex;
}
}
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