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

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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.cpp

• //
  // 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.
  //
  
  #include "compiler/MapLongVariableNames.h"
  
  namespace {
  
  TString mapLongName(int id, const TString& name, bool global)
  {
      ASSERT(name.size() > MAX_SHORTENED_IDENTIFIER_SIZE);
      TStringStream stream;
      stream << "webgl_";
      if (global)
          stream << "g";
      stream << id << "_";
      stream << name.substr(0, MAX_SHORTENED_IDENTIFIER_SIZE - stream.str().size());
      return stream.str();
  }
  
  MapLongVariableNames* gMapLongVariableNamesInstance = NULL;
  
  }  // anonymous namespace
  
  MapLongVariableNames::MapLongVariableNames()
      : refCount(0)
  {
  }
  
  MapLongVariableNames::~MapLongVariableNames()
  {
  }
  
  // static
  MapLongVariableNames* MapLongVariableNames::GetInstance()
  {
      if (gMapLongVariableNamesInstance == NULL)
          gMapLongVariableNamesInstance = new MapLongVariableNames;
      gMapLongVariableNamesInstance->refCount++;
      return gMapLongVariableNamesInstance;
  }
  
  void MapLongVariableNames::Release()
  {
      ASSERT(gMapLongVariableNamesInstance == this);
      ASSERT(refCount > 0);
      refCount--;
      if (refCount == 0) {
          delete gMapLongVariableNamesInstance;
          gMapLongVariableNamesInstance = NULL;
      }
  }
  
  void MapLongVariableNames::visitSymbol(TIntermSymbol* symbol)
  {
      ASSERT(symbol != NULL);
      if (symbol->getSymbol().size() > MAX_SHORTENED_IDENTIFIER_SIZE) {
          switch (symbol->getQualifier()) {
            case EvqVaryingIn:
            case EvqVaryingOut:
            case EvqInvariantVaryingIn:
            case EvqInvariantVaryingOut:
            case EvqUniform:
              symbol->setSymbol(
                  mapLongGlobalName(symbol->getSymbol()));
              break;
            default:
              symbol->setSymbol(
                  mapLongName(symbol->getId(), symbol->getSymbol(), false));
              break;
          };
      }
  }
  
  bool MapLongVariableNames::visitLoop(Visit, TIntermLoop* node)
  {
      if (node->getInit())
          node->getInit()->traverse(this);
      return true;
  }
  
  TString MapLongVariableNames::mapLongGlobalName(const TString& name)
  {
      std::map<std::string, std::string>::const_iterator it = longGlobalNameMap.find(name.c_str());
      if (it != longGlobalNameMap.end())
          return (*it).second.c_str();
  
      int id = longGlobalNameMap.size();
      TString mappedName = mapLongName(id, name, true);
      longGlobalNameMap.insert(
          std::map<std::string, std::string>::value_type(name.c_str(), mappedName.c_str()));
      return mappedName;
  }