kc3-lang/angle/src/libGLESv2/renderer/IndexBuffer.h

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• Hash : bdf2d80f
  Author :
  Date : 2013-02-28T23:16:20
  

  Add precompiled header support for the libGLESv2 project.
  
  TRAC #22518
  
  Signed-off-by: Geoff Lang
  Signed-off-by: Shannon Woods
  Author: Jamie Madill
  
  git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1938 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/libGLESv2/renderer/IndexBuffer.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.
  //
  
  // IndexBuffer.h: Defines the abstract IndexBuffer class and IndexBufferInterface
  // class with derivations, classes that perform graphics API agnostic index buffer operations.
  
  #ifndef LIBGLESV2_RENDERER_INDEXBUFFER_H_
  #define LIBGLESV2_RENDERER_INDEXBUFFER_H_
  
  #include "common/angleutils.h"
  
  namespace rx
  {
  class Renderer;
  
  class IndexBuffer
  {
    public:
      IndexBuffer();
      virtual ~IndexBuffer();
  
      virtual bool initialize(unsigned int bufferSize, GLenum indexType, bool dynamic) = 0;
  
      virtual bool mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory) = 0;
      virtual bool unmapBuffer() = 0;
  
      virtual bool discard() = 0;
  
      virtual GLenum getIndexType() const = 0;
      virtual unsigned int getBufferSize() const = 0;
      virtual bool setSize(unsigned int bufferSize, GLenum indexType) = 0;
  
      unsigned int getSerial() const;
  
    protected:
      void updateSerial();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(IndexBuffer);
  
      unsigned int mSerial;
      static unsigned int mNextSerial;
  };
  
  class IndexBufferInterface
  {
    public:
      IndexBufferInterface(Renderer *renderer, bool dynamic);
      virtual ~IndexBufferInterface();
  
      virtual bool reserveBufferSpace(unsigned int size, GLenum indexType) = 0;
  
      GLenum getIndexType() const;
      unsigned int getBufferSize() const;
  
      unsigned int getSerial() const;
  
      int mapBuffer(unsigned int size, void** outMappedMemory);
      bool unmapBuffer();
  
      IndexBuffer *getIndexBuffer() const;
  
    protected:
      unsigned int getWritePosition() const;
      void setWritePosition(unsigned int writePosition);
  
      bool discard();
  
      bool setBufferSize(unsigned int bufferSize, GLenum indexType);
  
    private:
      DISALLOW_COPY_AND_ASSIGN(IndexBufferInterface);
  
      rx::Renderer *const mRenderer;
  
      IndexBuffer* mIndexBuffer;
  
      unsigned int mWritePosition;
      bool mDynamic;
  };
  
  class StreamingIndexBufferInterface : public IndexBufferInterface
  {
    public:
      StreamingIndexBufferInterface(Renderer *renderer);
      ~StreamingIndexBufferInterface();
  
      virtual bool reserveBufferSpace(unsigned int size, GLenum indexType);
  };
  
  class StaticIndexBufferInterface : public IndexBufferInterface
  {
    public:
      explicit StaticIndexBufferInterface(Renderer *renderer);
      ~StaticIndexBufferInterface();
  
      virtual bool reserveBufferSpace(unsigned int size, GLenum indexType);
  
      unsigned int lookupRange(intptr_t offset, GLsizei count, unsigned int *minIndex, unsigned int *maxIndex);   // Returns the offset into the index buffer, or -1 if not found
      void addRange(intptr_t offset, GLsizei count, unsigned int minIndex, unsigned int maxIndex, unsigned int streamOffset);
  
    private:
      struct IndexRange
      {
          intptr_t offset;
          GLsizei count;
  
          bool operator<(const IndexRange& rhs) const
          {
              if (offset != rhs.offset)
              {
                  return offset < rhs.offset;
              }
              if (count != rhs.count)
              {
                  return count < rhs.count;
              }
              return false;
          }
      };
  
      struct IndexResult
      {
          unsigned int minIndex;
          unsigned int maxIndex;
          unsigned int streamOffset;
      };
  
      std::map<IndexRange, IndexResult> mCache;
  };
  
  }
  
  #endif // LIBGLESV2_RENDERER_INDEXBUFFER_H_

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