1 // 2 // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 // UnfoldSelect is an AST traverser to output the select operator ?: as if-else statements 7 // 8 9 #include "compiler/UnfoldSelect.h" 10 11 #include "compiler/InfoSink.h" 12 #include "compiler/OutputHLSL.h" 13 14 namespace sh 15 { UnfoldSelect(TParseContext & context,OutputHLSL * outputHLSL)16UnfoldSelect::UnfoldSelect(TParseContext &context, OutputHLSL *outputHLSL) : mContext(context), mOutputHLSL(outputHLSL) 17 { 18 mTemporaryIndex = 0; 19 } 20 traverse(TIntermNode * node)21void UnfoldSelect::traverse(TIntermNode *node) 22 { 23 mTemporaryIndex++; 24 node->traverse(this); 25 } 26 visitSelection(Visit visit,TIntermSelection * node)27bool UnfoldSelect::visitSelection(Visit visit, TIntermSelection *node) 28 { 29 TInfoSinkBase &out = mOutputHLSL->getBodyStream(); 30 31 if (node->usesTernaryOperator()) 32 { 33 int i = mTemporaryIndex++; 34 35 out << mOutputHLSL->typeString(node->getType()) << " t" << i << ";\n"; 36 37 node->getCondition()->traverse(this); 38 out << "if("; 39 node->getCondition()->traverse(mOutputHLSL); 40 out << ")\n" 41 "{\n"; 42 node->getTrueBlock()->traverse(this); 43 out << " t" << i << " = "; 44 node->getTrueBlock()->traverse(mOutputHLSL); 45 out << ";\n" 46 "}\n" 47 "else\n" 48 "{\n"; 49 node->getFalseBlock()->traverse(this); 50 out << " t" << i << " = "; 51 node->getFalseBlock()->traverse(mOutputHLSL); 52 out << ";\n" 53 "}\n"; 54 55 mTemporaryIndex--; 56 } 57 58 return false; 59 } 60 getTemporaryIndex()61int UnfoldSelect::getTemporaryIndex() 62 { 63 return mTemporaryIndex; 64 } 65 } 66