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

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• Author : Jamie Madill
  Date : 2013-08-30 13:21:09
  Hash : 86a97a1a
  Message : Use the proper register count for structs in HLSL uniforms and varyings. We must respect HLSL packing rules when uploading structs to D3D. TRAC #23748 Signed-off-by: Geoff Lang Signed-off-by: Nicolas Capens

• 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>
  #define GL_APICALL
  #include <GLES3/gl3.h>
  #include <GLES2/gl2.h>
  
  namespace sh
  {
  
  struct ShaderVariable;
  struct InterfaceBlockField;
  struct BlockMemberInfo;
  
  class BlockLayoutEncoder
  {
    public:
      BlockLayoutEncoder(std::vector<BlockMemberInfo> *blockInfoOut);
  
      void encodeInterfaceBlockFields(const std::vector<InterfaceBlockField> &fields);
      void encodeInterfaceBlockField(const InterfaceBlockField &field);
      void encodeType(GLenum type, unsigned int arraySize, bool isRowMajorMatrix);
      size_t getBlockSize() const { return mCurrentOffset * BytesPerComponent; }
  
      static const size_t BytesPerComponent = 4u;
      static const unsigned int ComponentsPerRegister = 4u;
  
    protected:
      size_t mCurrentOffset;
  
      void nextRegister();
  
      virtual void enterAggregateType() = 0;
      virtual void exitAggregateType() = 0;
      virtual void getBlockLayoutInfo(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int *arrayStrideOut, int *matrixStrideOut) = 0;
      virtual void advanceOffset(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, 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(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int *arrayStrideOut, int *matrixStrideOut);
      virtual void advanceOffset(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int arrayStride, int matrixStride);
  };
  
  }
  
  #endif // TRANSLATOR_COMMON_BLOCKLAYOUTENCODER_H_