kc3-lang/angle/src/compiler/OutputGLSLBase.h

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• Hash : 5601ea0d
  Author :
  Date : 2011-06-10T18:23:25
  

  Implement ES2 backend for Angle translator.
  
  With this CL, we have the option to select a code output backend: GLSL, GLSL ES, or HLSL.
  
  Note that we always emit the highest supported float precision for fragment shader due to anglebug 168.  Although this is a temporary solution, it's not against GLSL ES spec, because it's ok for implementation to upgrade precision.
  
  Tested with WebGL conformance test suite, GLES2 conformance test suite (only failed 2/1198), and a few webgl demos, including worlds of webgl, aquarium, etc.
  
  anglebug=81
  test=translator emitting correct GLSL ES code when ES2 backend is selected.
  Review URL: http://codereview.appspot.com/4550129
  
  git-svn-id: https://angleproject.googlecode.com/svn/trunk@687 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/compiler/OutputGLSLBase.h

• //
  // Copyright (c) 2002-2011 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.
  //
  
  #ifndef CROSSCOMPILERGLSL_OUTPUTGLSLBASE_H_
  #define CROSSCOMPILERGLSL_OUTPUTGLSLBASE_H_
  
  #include <set>
  
  #include "compiler/ForLoopUnroll.h"
  #include "compiler/intermediate.h"
  #include "compiler/ParseHelper.h"
  
  class TOutputGLSLBase : public TIntermTraverser
  {
  public:
      TOutputGLSLBase(TInfoSinkBase& objSink);
  
  protected:
      TInfoSinkBase& objSink() { return mObjSink; }
      void writeTriplet(Visit visit, const char* preStr, const char* inStr, const char* postStr);
      void writeVariableType(const TType& type);
      virtual bool writeVariablePrecision(TPrecision precision) = 0;
      void writeFunctionParameters(const TIntermSequence& args);
      const ConstantUnion* writeConstantUnion(const TType& type, const ConstantUnion* pConstUnion);
  
      virtual void visitSymbol(TIntermSymbol* node);
      virtual void visitConstantUnion(TIntermConstantUnion* node);
      virtual bool visitBinary(Visit visit, TIntermBinary* node);
      virtual bool visitUnary(Visit visit, TIntermUnary* node);
      virtual bool visitSelection(Visit visit, TIntermSelection* node);
      virtual bool visitAggregate(Visit visit, TIntermAggregate* node);
      virtual bool visitLoop(Visit visit, TIntermLoop* node);
      virtual bool visitBranch(Visit visit, TIntermBranch* node);
  
      void visitCodeBlock(TIntermNode* node);
  
  private:
      TInfoSinkBase& mObjSink;
      bool mDeclaringVariables;
  
      // Structs are declared as the tree is traversed. This set contains all
      // the structs already declared. It is maintained so that a struct is
      // declared only once.
      typedef std::set<TString> DeclaredStructs;
      DeclaredStructs mDeclaredStructs;
  
      ForLoopUnroll mLoopUnroll;
  };
  
  #endif  // CROSSCOMPILERGLSL_OUTPUTGLSLBASE_H_
  

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