kc3-lang/angle/src/compiler/BlockLayoutEncoder.h

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• Author : Jamie Madill
  Date : 2013-06-20 11:55:55
  Hash : 440dc749
  Message : Redesign the code that uses block layouts to use a generic base class. The cleaner code also has the benefit of allowing us to separate the HLSL-specific parts out of the shader validator. TRAC #23083 Signed-off-by: Nicolas Capens Signed-off-by: Shannon Woods Authored-by: Jamie Madill

• src/compiler/BlockLayoutEncoder.h

• //
  // Copyright (c) 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.
  //
  
  #ifndef TRANSLATOR_COMMON_BLOCKLAYOUTENCODER_H_
  #define TRANSLATOR_COMMON_BLOCKLAYOUTENCODER_H_
  
  #include <vector>
  
  namespace sh
  {
  
  struct Uniform;
  struct BlockMemberInfo;
  
  class BlockLayoutEncoder
  {
    public:
      BlockLayoutEncoder(std::vector<BlockMemberInfo> *blockInfoOut);
  
      void encodeFields(const std::vector<Uniform> &fields);
      void encodeType(const Uniform &uniform);
      size_t getBlockSize() { return mCurrentOffset * ComponentSize; }
  
      static const size_t ComponentSize = 4u;
      static const unsigned int RegisterSize = 4u;
  
    protected:
      size_t mCurrentOffset;
  
      void nextRegister();
  
      virtual void enterAggregateType() = 0;
      virtual void exitAggregateType() = 0;
      virtual void getBlockLayoutInfo(const Uniform &uniform, int *arrayStrideOut, int *matrixStrideOut) = 0;
      virtual void advanceOffset(const Uniform &uniform, int arrayStride, int matrixStride) = 0;
  
    private:
      std::vector<BlockMemberInfo> *mBlockInfoOut;
  };
  
  // Block layout according to the std140 block layout
  // See "Standard Uniform Block Layout" in Section 2.11.6 of the OpenGL ES 3.0 specification
  
  class Std140BlockEncoder : public BlockLayoutEncoder
  {
    public:
      Std140BlockEncoder(std::vector<BlockMemberInfo> *blockInfoOut);
  
    protected:
      virtual void enterAggregateType();
      virtual void exitAggregateType();
      virtual void getBlockLayoutInfo(const Uniform &uniform, int *arrayStrideOut, int *matrixStrideOut);
      virtual void advanceOffset(const Uniform &uniform, int arrayStride, int matrixStride);
  };
  
  }
  
  #endif // TRANSLATOR_COMMON_BLOCKLAYOUTENCODER_H_