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

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• Hash : 6d40bbdd
  Author :
  Date : 2016-09-30T13:49:38
  

  Split TIntermBlock from TIntermAggregate
  
  The new TIntermBlock node class replaces TIntermAggregate nodes with
  the EOpSequence op. It represents the root node of the tree which is
  a list of declarations and function definitions, and any code blocks
  that can be denoted by curly braces. These include function and loop
  bodies, and if-else branches.
  
  This change enables a bunch of more compile-time type checking, and
  makes the AST code easier to understand and less error-prone.
  
  The PostProcess step that used to be done to ensure that the root node
  is TIntermAggregate is removed in favor of making sure that the root
  node is a TIntermBlock in the glslang.y parsing code.
  
  Intermediate output formatting is improved to print the EOpNull error
  in a clearer way.
  
  After this patch, TIntermAggregate is still used for function
  definitions, function prototypes, function parameter lists, function
  calls, variable and invariant declarations and the comma (sequence)
  operator.
  
  BUG=angleproject:1490
  TEST=angle_unittests, angle_end2end_tests
  
  Change-Id: I04044affff979a11577bc1fe75d747e538b799c8
  Reviewed-on: https://chromium-review.googlesource.com/393726
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Corentin Wallez <cwallez@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_SCALARIZEVECANDMATCONSTRUCTORARGS_H_
  #define COMPILER_TRANSLATOR_SCALARIZEVECANDMATCONSTRUCTORARGS_H_
  
  #include "compiler/translator/IntermNode.h"
  
  class ScalarizeVecAndMatConstructorArgs : public TIntermTraverser
  {
    public:
      ScalarizeVecAndMatConstructorArgs(sh::GLenum shaderType,
                                        bool fragmentPrecisionHigh)
          : TIntermTraverser(true, false, false),
            mTempVarCount(0),
            mShaderType(shaderType),
            mFragmentPrecisionHigh(fragmentPrecisionHigh) {}
  
    protected:
      bool visitAggregate(Visit visit, TIntermAggregate *node) override;
      bool visitBlock(Visit visit, TIntermBlock *node) override;
  
    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> mBlockStack;
      int mTempVarCount;
  
      sh::GLenum mShaderType;
      bool mFragmentPrecisionHigh;
  };
  
  #endif  // COMPILER_TRANSLATOR_SCALARIZEVECANDMATCONSTRUCTORARGS_H_
  

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