michael@0: //
michael@0: // Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: // IndexBuffer.h: Defines the abstract IndexBuffer class and IndexBufferInterface
michael@0: // class with derivations, classes that perform graphics API agnostic index buffer operations.
michael@0: 
michael@0: #ifndef LIBGLESV2_RENDERER_INDEXBUFFER_H_
michael@0: #define LIBGLESV2_RENDERER_INDEXBUFFER_H_
michael@0: 
michael@0: #include "common/angleutils.h"
michael@0: #include "libGLESv2/renderer/IndexRangeCache.h"
michael@0: 
michael@0: namespace rx
michael@0: {
michael@0: class Renderer;
michael@0: 
michael@0: class IndexBuffer
michael@0: {
michael@0:   public:
michael@0:     IndexBuffer();
michael@0:     virtual ~IndexBuffer();
michael@0: 
michael@0:     virtual bool initialize(unsigned int bufferSize, GLenum indexType, bool dynamic) = 0;
michael@0: 
michael@0:     virtual bool mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory) = 0;
michael@0:     virtual bool unmapBuffer() = 0;
michael@0: 
michael@0:     virtual bool discard() = 0;
michael@0: 
michael@0:     virtual GLenum getIndexType() const = 0;
michael@0:     virtual unsigned int getBufferSize() const = 0;
michael@0:     virtual bool setSize(unsigned int bufferSize, GLenum indexType) = 0;
michael@0: 
michael@0:     unsigned int getSerial() const;
michael@0: 
michael@0:   protected:
michael@0:     void updateSerial();
michael@0: 
michael@0:   private:
michael@0:     DISALLOW_COPY_AND_ASSIGN(IndexBuffer);
michael@0: 
michael@0:     unsigned int mSerial;
michael@0:     static unsigned int mNextSerial;
michael@0: };
michael@0: 
michael@0: class IndexBufferInterface
michael@0: {
michael@0:   public:
michael@0:     IndexBufferInterface(Renderer *renderer, bool dynamic);
michael@0:     virtual ~IndexBufferInterface();
michael@0: 
michael@0:     virtual bool reserveBufferSpace(unsigned int size, GLenum indexType) = 0;
michael@0: 
michael@0:     GLenum getIndexType() const;
michael@0:     unsigned int getBufferSize() const;
michael@0: 
michael@0:     unsigned int getSerial() const;
michael@0: 
michael@0:     bool mapBuffer(unsigned int size, void** outMappedMemory, unsigned int *streamOffset);
michael@0:     bool unmapBuffer();
michael@0: 
michael@0:     IndexBuffer *getIndexBuffer() const;
michael@0: 
michael@0:   protected:
michael@0:     unsigned int getWritePosition() const;
michael@0:     void setWritePosition(unsigned int writePosition);
michael@0: 
michael@0:     bool discard();
michael@0: 
michael@0:     bool setBufferSize(unsigned int bufferSize, GLenum indexType);
michael@0: 
michael@0:   private:
michael@0:     DISALLOW_COPY_AND_ASSIGN(IndexBufferInterface);
michael@0: 
michael@0:     rx::Renderer *const mRenderer;
michael@0: 
michael@0:     IndexBuffer* mIndexBuffer;
michael@0: 
michael@0:     unsigned int mWritePosition;
michael@0:     bool mDynamic;
michael@0: };
michael@0: 
michael@0: class StreamingIndexBufferInterface : public IndexBufferInterface
michael@0: {
michael@0:   public:
michael@0:     StreamingIndexBufferInterface(Renderer *renderer);
michael@0:     ~StreamingIndexBufferInterface();
michael@0: 
michael@0:     virtual bool reserveBufferSpace(unsigned int size, GLenum indexType);
michael@0: };
michael@0: 
michael@0: class StaticIndexBufferInterface : public IndexBufferInterface
michael@0: {
michael@0:   public:
michael@0:     explicit StaticIndexBufferInterface(Renderer *renderer);
michael@0:     ~StaticIndexBufferInterface();
michael@0: 
michael@0:     virtual bool reserveBufferSpace(unsigned int size, GLenum indexType);
michael@0: 
michael@0:     IndexRangeCache *getIndexRangeCache();
michael@0: 
michael@0:   private:
michael@0:     IndexRangeCache mIndexRangeCache;
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif // LIBGLESV2_RENDERER_INDEXBUFFER_H_