kc3-lang/angle/src/compiler/translator/ScalarizeVecAndMatConstructorArgs.h

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• Hash : cd68fe79
  Author :
  Date : 2014-07-11T10:45:44
  

  Add a compiler option to rewrite vec/mat constructors
  
  If one of the parameters is a vec/mat, expand it into scalars.
  
  This is to work around Linux NVIDIA/AMD and Mac NVIDIA driver bugs.
  
  BUG=angle:695
  TEST=webgl conformance test
  
  Change-Id: I35e1e25167d99f873dcb03bfb57a30e84b1aeed5
  Reviewed-on: https://chromium-review.googlesource.com/207479
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Tested-by: Zhenyao Mo <zmo@chromium.org>
  

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• src/compiler/translator/ScalarizeVecAndMatConstructorArgs.h

• //
  // Copyright (c) 2002-2014 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_TRANSLATOR_SCALARIZE_VEC_AND_MAT_CONSTRUCTOR_ARGS_H_
  #define COMPILER_TRANSLATOR_SCALARIZE_VEC_AND_MAT_CONSTRUCTOR_ARGS_H_
  
  #include "compiler/translator/intermediate.h"
  
  class ScalarizeVecAndMatConstructorArgs : public TIntermTraverser
  {
    public:
      ScalarizeVecAndMatConstructorArgs()
          : mTempVarCount(0) {}
  
    protected:
      virtual bool visitAggregate(Visit visit, TIntermAggregate *node);
  
    private:
      void scalarizeArgs(TIntermAggregate *aggregate,
                         bool scalarizeVector, bool scalarizeMatrix);
  
      // If we have the following code:
      //   mat4 m(0);
      //   vec4 v(1, m);
      // We will rewrite to:
      //   mat4 m(0);
      //   mat4 _webgl_tmp_mat_0 = m;
      //   vec4 v(1, _webgl_tmp_mat_0[0][0], _webgl_tmp_mat_0[0][1], _webgl_tmp_mat_0[0][2]);
      // This function is to create nodes for "mat4 _webgl_tmp_mat_0 = m;" and insert it to
      // the code sequence.
      // Return the temporary variable name.
      TString createTempVariable(TIntermTyped *original);
  
      std::vector<TIntermSequence> mSequenceStack;
      int mTempVarCount;
  };
  
  #endif  // COMPILER_TRANSLATOR_SCALARIZE_VEC_AND_MAT_CONSTRUCTOR_ARGS_H_
  

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