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//
// 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 LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_
#define LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_
#include "common/angleutils.h"
#include "libANGLE/Error.h"
namespace rx
{
class BufferFactoryD3D;
class IndexBuffer : angle::NonCopyable
{
public:
IndexBuffer();
virtual ~IndexBuffer();
virtual gl::Error initialize(unsigned int bufferSize, GLenum indexType, bool dynamic) = 0;
virtual gl::Error mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory) = 0;
virtual gl::Error unmapBuffer() = 0;
virtual gl::Error discard() = 0;
virtual GLenum getIndexType() const = 0;
virtual unsigned int getBufferSize() const = 0;
virtual gl::Error setSize(unsigned int bufferSize, GLenum indexType) = 0;
unsigned int getSerial() const;
protected:
void updateSerial();
private:
unsigned int mSerial;
static unsigned int mNextSerial;
};
class IndexBufferInterface : angle::NonCopyable
{
public:
IndexBufferInterface(BufferFactoryD3D *factory, bool dynamic);
virtual ~IndexBufferInterface();
virtual gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) = 0;
GLenum getIndexType() const;
unsigned int getBufferSize() const;
unsigned int getSerial() const;
gl::Error mapBuffer(unsigned int size, void** outMappedMemory, unsigned int *streamOffset);
gl::Error unmapBuffer();
IndexBuffer *getIndexBuffer() const;
protected:
unsigned int getWritePosition() const;
void setWritePosition(unsigned int writePosition);
gl::Error discard();
gl::Error setBufferSize(unsigned int bufferSize, GLenum indexType);
private:
IndexBuffer *mIndexBuffer;
unsigned int mWritePosition;
bool mDynamic;
};
class StreamingIndexBufferInterface : public IndexBufferInterface
{
public:
explicit StreamingIndexBufferInterface(BufferFactoryD3D *factory);
~StreamingIndexBufferInterface();
gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) override;
};
class StaticIndexBufferInterface : public IndexBufferInterface
{
public:
explicit StaticIndexBufferInterface(BufferFactoryD3D *factory);
~StaticIndexBufferInterface();
gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) override;
};
}
#endif // LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_
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