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

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• Hash : a718c1e0
  Author :
  Date : 2014-07-02T15:31:22
  

  Use shader variable types for variable collection.
  
  Retire the old TVariableInfoList structure, and use the new
  objects which we will expose more directly through the API.
  
  BUG=angle:466
  
  Change-Id: I999a97369bfb67cf73cd659c4fe885b41429d304
  Reviewed-on: https://chromium-review.googlesource.com/205839
  Tested-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Nicolas Capens <capn@chromium.org>
  

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• src/compiler/translator/VariablePacker.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 _VARIABLEPACKER_INCLUDED_
  #define _VARIABLEPACKER_INCLUDED_
  
  #include <vector>
  #include "compiler/translator/VariableInfo.h"
  
  class VariablePacker {
   public:
      // Returns true if the passed in variables pack in maxVectors following
      // the packing rules from the GLSL 1.017 spec, Appendix A, section 7.
      template <typename VarT>
      bool CheckVariablesWithinPackingLimits(unsigned int maxVectors,
                                             const std::vector<VarT> &in_variables);
  
      // Gets how many components in a row a data type takes.
      static int GetNumComponentsPerRow(sh::GLenum type);
  
      // Gets how many rows a data type takes.
      static int GetNumRows(sh::GLenum type);
  
    private:
      static const int kNumColumns = 4;
      static const unsigned kColumnMask = (1 << kNumColumns) - 1;
  
      unsigned makeColumnFlags(int column, int numComponentsPerRow);
      void fillColumns(int topRow, int numRows, int column, int numComponentsPerRow);
      bool searchColumn(int column, int numRows, int* destRow, int* destSize);
  
      int topNonFullRow_;
      int bottomNonFullRow_;
      int maxRows_;
      std::vector<unsigned> rows_;
  };
  
  #endif // _VARIABLEPACKER_INCLUDED_
  

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