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

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• Author : Geoff Lang
  Date : 2013-08-02 11:54:08
  Hash : a36ead4a
  Message : Updated VertexBuffer's getSpaceRequired and storeVertexAttributes methods to return bools and fixed some validation of parameters to prevent under and overflows. TRAC #23643 Signed-off-by: Nicolas Capens Signed-off-by: Shannon Woods Author: Geoff Lang

• 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"
  #include "libGLESv2/renderer/IndexRangeCache.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;
  
      bool mapBuffer(unsigned int size, void** outMappedMemory, unsigned int *streamOffset);
      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);
  
      IndexRangeCache *getIndexRangeCache();
  
    private:
      IndexRangeCache mIndexRangeCache;
  };
  
  }
  
  #endif // LIBGLESV2_RENDERER_INDEXBUFFER_H_