kc3-lang/angle/src/common/blocklayout.h

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• Hash : 9fba2ba0
  Author :
  Date : 2014-04-22T14:21:00
  

  Fix GCC Release build.
  
  The release build was complaining about a missing size_t definition
  in blocklayout.h.
  
  BUG=angle:568
  
  Change-Id: I9757f3ac45627a2a73d4f90cc507f8620674820e
  Reviewed-on: https://chromium-review.googlesource.com/196290
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

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• src/common/blocklayout.h

• //
  // Copyright (c) 2013-2014 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.
  //
  // blocklayout.h:
  //   Methods and classes related to uniform layout and packing in GLSL and HLSL.
  //
  
  #ifndef COMMON_BLOCKLAYOUT_H_
  #define COMMON_BLOCKLAYOUT_H_
  
  #include <vector>
  #define GL_APICALL
  #include <GLES3/gl3.h>
  #include <GLES2/gl2.h>
  #include <cstddef>
  
  namespace gl
  {
  
  struct ShaderVariable;
  struct InterfaceBlockField;
  struct BlockMemberInfo;
  struct Uniform;
  struct Varying;
  
  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);
  };
  
  // Block layout packed according to the default D3D11 register packing rules
  // See http://msdn.microsoft.com/en-us/library/windows/desktop/bb509632(v=vs.85).aspx
  
  class HLSLBlockEncoder : public BlockLayoutEncoder
  {
    public:
      HLSLBlockEncoder(std::vector<BlockMemberInfo> *blockInfoOut);
  
      virtual void enterAggregateType();
      virtual void exitAggregateType();
  
    protected:
      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);
  };
  
  // This method assigns values to the variable's "registerIndex" and "elementIndex" fields.
  // "elementIndex" is only used for structures.
  void HLSLVariableGetRegisterInfo(unsigned int baseRegisterIndex, Uniform *variable);
  
  // This method returns the number of used registers for a ShaderVariable. It is dependent on the HLSLBlockEncoder
  // class to count the number of used registers in a struct (which are individually packed according to the same rules).
  unsigned int HLSLVariableRegisterCount(const Varying &variable);
  unsigned int HLSLVariableRegisterCount(const Uniform &variable);
  
  }
  
  #endif // COMMON_BLOCKLAYOUT_H_
  

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