kc3-lang/angle/src/compiler/translator/InitializeVariables.cpp

Branch : - branch - main - tag -

• Show log

  Commit

• Author : Zhenyao Mo
  Date : 2014-02-11 12:35:01
  Hash : 4a667fe9
  Message : Add an option to initialize varyings without static use in vertex shaders ANGLEBUG=554 TEST=webgl conformance test on mac: shaders-with-varyings.html r=kbr@chromium.org,nicolascapens@chromium.org cc=alokp@chromium.org,shannonwoods@chromium.org Change-Id: I2e692d43fb15f1cf3ade3e398020d1fedb2b32f0 Reviewed-on: https://chromium-review.googlesource.com/185922 Reviewed-by: Zhenyao Mo <zmo@chromium.org> Tested-by: Zhenyao Mo <zmo@chromium.org> Conflicts: src/common/version.h src/compiler/translator/Compiler.cpp Change-Id: If7db13ef345bd6199d4ea0d7786f0de20885f2f3 Reviewed-on: https://chromium-review.googlesource.com/186144 Reviewed-by: Nicolas Capens <nicolascapens@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Zhenyao Mo <zmo@chromium.org> Tested-by: Zhenyao Mo <zmo@chromium.org>

• src/compiler/translator/InitializeVariables.cpp

• //
  // Copyright (c) 2002-2013 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/translator/InitializeVariables.h"
  #include "compiler/translator/compilerdebug.h"
  
  namespace
  {
  
  TIntermConstantUnion* constructFloatConstUnionNode(const TType& type)
  {
      TType myType = type;
      unsigned char size = myType.getNominalSize();
      if (myType.isMatrix())
          size *= size;
      ConstantUnion *u = new ConstantUnion[size];
      for (int ii = 0; ii < size; ++ii)
          u[ii].setFConst(0.0f);
  
      myType.clearArrayness();
      myType.setQualifier(EvqConst);
      TIntermConstantUnion *node = new TIntermConstantUnion(u, myType);
      return node;
  }
  
  TIntermConstantUnion* constructIndexNode(int index)
  {
      ConstantUnion *u = new ConstantUnion[1];
      u[0].setIConst(index);
  
      TType type(EbtInt, EbpUndefined, EvqConst, 1);
      TIntermConstantUnion *node = new TIntermConstantUnion(u, type);
      return node;
  }
  
  }  // namespace anonymous
  
  bool InitializeVariables::visitAggregate(Visit visit, TIntermAggregate* node)
  {
      bool visitChildren = !mCodeInserted;
      switch (node->getOp())
      {
        case EOpSequence:
          break;
        case EOpFunction:
        {
          // Function definition.
          ASSERT(visit == PreVisit);
          if (node->getName() == "main(")
          {
              TIntermSequence &sequence = node->getSequence();
              ASSERT((sequence.size() == 1) || (sequence.size() == 2));
              TIntermAggregate *body = NULL;
              if (sequence.size() == 1)
              {
                  body = new TIntermAggregate(EOpSequence);
                  sequence.push_back(body);
              }
              else
              {
                  body = sequence[1]->getAsAggregate();
              }
              ASSERT(body);
              insertInitCode(body->getSequence());
              mCodeInserted = true;
          }
          break;
        }
        default:
          visitChildren = false;
          break;
      }
      return visitChildren;
  }
  
  void InitializeVariables::insertInitCode(TIntermSequence& sequence)
  {
      for (size_t ii = 0; ii < mVariables.size(); ++ii)
      {
          const InitVariableInfo& varInfo = mVariables[ii];
  
          if (varInfo.type.isArray())
          {
              for (int index = varInfo.type.getArraySize() - 1; index >= 0; --index)
              {
                  TIntermBinary *assign = new TIntermBinary(EOpAssign);
                  sequence.insert(sequence.begin(), assign);
  
                  TIntermBinary *indexDirect = new TIntermBinary(EOpIndexDirect);
                  TIntermSymbol *symbol = new TIntermSymbol(0, varInfo.name, varInfo.type);
                  indexDirect->setLeft(symbol);
                  TIntermConstantUnion *indexNode = constructIndexNode(index);
                  indexDirect->setRight(indexNode);
  
                  assign->setLeft(indexDirect);
  
                  TIntermConstantUnion *zeroConst = constructFloatConstUnionNode(varInfo.type);
                  assign->setRight(zeroConst);
              }
          }
          else
          {
              TIntermBinary *assign = new TIntermBinary(EOpAssign);
              sequence.insert(sequence.begin(), assign);
              TIntermSymbol *symbol = new TIntermSymbol(0, varInfo.name, varInfo.type);
              assign->setLeft(symbol);
              TIntermConstantUnion *zeroConst = constructFloatConstUnionNode(varInfo.type);
              assign->setRight(zeroConst);
          }
  
      }
  }