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64 lines
2 KiB
C++
64 lines
2 KiB
C++
//
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// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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#ifndef COMPILER_TRANSLATOR_EMULATE_PRECISION_H_
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#define COMPILER_TRANSLATOR_EMULATE_PRECISION_H_
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#include "common/angleutils.h"
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#include "compiler/translator/Compiler.h"
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#include "compiler/translator/InfoSink.h"
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#include "compiler/translator/IntermNode.h"
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#include "GLSLANG/ShaderLang.h"
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// This class gathers all compound assignments from the AST and can then write
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// the functions required for their precision emulation. This way there is no
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// need to write a huge number of variations of the emulated compound assignment
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// to every translated shader with emulation enabled.
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class EmulatePrecision : public TLValueTrackingTraverser
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{
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public:
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EmulatePrecision(const TSymbolTable &symbolTable, int shaderVersion);
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void visitSymbol(TIntermSymbol *node) override;
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bool visitBinary(Visit visit, TIntermBinary *node) override;
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bool visitUnary(Visit visit, TIntermUnary *node) override;
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bool visitAggregate(Visit visit, TIntermAggregate *node) override;
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void writeEmulationHelpers(TInfoSinkBase &sink,
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const int shaderVersion,
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const ShShaderOutput outputLanguage);
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private:
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struct TypePair
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{
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TypePair(const char *l, const char *r)
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: lType(l), rType(r) { }
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const char *lType;
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const char *rType;
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};
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struct TypePairComparator
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{
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bool operator() (const TypePair& l, const TypePair& r) const
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{
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if (l.lType == r.lType)
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return l.rType < r.rType;
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return l.lType < r.lType;
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}
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};
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typedef std::set<TypePair, TypePairComparator> EmulationSet;
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EmulationSet mEmulateCompoundAdd;
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EmulationSet mEmulateCompoundSub;
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EmulationSet mEmulateCompoundMul;
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EmulationSet mEmulateCompoundDiv;
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bool mDeclaringVariables;
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};
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#endif // COMPILER_TRANSLATOR_EMULATE_PRECISION_H_
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