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

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• Author : zmo@google.com
  Date : 2012-01-13 00:29:21
  Hash : 4625d27b
  Message : Long name mapping needs to be consistent between vertex/fragment shaders. For example: varying variables, uniforms. This CL makes MapLongVariableNames a ref-counted singleton and therefore, the map is shared by all shaders. Also, function/variable names changes from Varying to Global because uniforms also need to be consistent, not just varying variables. ANGLEBUG=279 TEST=webgl conformance tests, especially invalid-passed-params.html and glsl-long-variable-names.html Review URL: http://codereview.appspot.com/5539046 git-svn-id: https://angleproject.googlecode.com/svn/trunk@942 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/compiler/MapLongVariableNames.h

• //
  // Copyright (c) 2002-2012 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 COMPILER_MAP_LONG_VARIABLE_NAMES_H_
  #define COMPILER_MAP_LONG_VARIABLE_NAMES_H_
  
  #include "GLSLANG/ShaderLang.h"
  
  #include "compiler/intermediate.h"
  #include "compiler/VariableInfo.h"
  
  // This size does not include '\0' in the end.
  #define MAX_SHORTENED_IDENTIFIER_SIZE 32
  
  // MapLongVariableNames is implemented as a ref-counted singleton.  The first
  // call of GetInstance() will create an instance and return it; latter calls
  // will return the same instance, with ref-count increased.  Release() will
  // reduce the ref-count, and when no more reference, release the instance.
  
  // Traverses intermediate tree to map attributes and uniforms names that are
  // longer than MAX_SHORTENED_IDENTIFIER_SIZE to MAX_SHORTENED_IDENTIFIER_SIZE.
  class MapLongVariableNames : public TIntermTraverser {
  public:
      static MapLongVariableNames* GetInstance();
      void Release();
  
      virtual void visitSymbol(TIntermSymbol*);
      virtual bool visitLoop(Visit, TIntermLoop*);
  
  private:
      MapLongVariableNames();
      virtual ~MapLongVariableNames();
  
      TString mapLongGlobalName(const TString& name);
  
      // Pair of long global varibale name <originalName, mappedName>.
      std::map<std::string, std::string> longGlobalNameMap;
      size_t refCount;
  };
  
  #endif  // COMPILER_MAP_LONG_VARIABLE_NAMES_H_