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//
// Copyright 2002 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/PackedEnums.h"
#include "common/angleutils.h"
#include "libANGLE/Error.h"
namespace gl
{
class Context;
} // namespace gl
namespace rx
{
class BufferFactoryD3D;
class IndexBuffer : angle::NonCopyable
{
public:
IndexBuffer();
virtual ~IndexBuffer();
virtual angle::Result initialize(const gl::Context *context,
unsigned int bufferSize,
gl::DrawElementsType indexType,
bool dynamic) = 0;
virtual angle::Result mapBuffer(const gl::Context *context,
unsigned int offset,
unsigned int size,
void **outMappedMemory) = 0;
virtual angle::Result unmapBuffer(const gl::Context *context) = 0;
virtual angle::Result discard(const gl::Context *context) = 0;
virtual gl::DrawElementsType getIndexType() const = 0;
virtual unsigned int getBufferSize() const = 0;
virtual angle::Result setSize(const gl::Context *context,
unsigned int bufferSize,
gl::DrawElementsType 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 angle::Result reserveBufferSpace(const gl::Context *context,
unsigned int size,
gl::DrawElementsType indexType) = 0;
gl::DrawElementsType getIndexType() const;
unsigned int getBufferSize() const;
unsigned int getSerial() const;
angle::Result mapBuffer(const gl::Context *context,
unsigned int size,
void **outMappedMemory,
unsigned int *streamOffset);
angle::Result unmapBuffer(const gl::Context *context);
IndexBuffer *getIndexBuffer() const;
protected:
unsigned int getWritePosition() const;
void setWritePosition(unsigned int writePosition);
angle::Result discard(const gl::Context *context);
angle::Result setBufferSize(const gl::Context *context,
unsigned int bufferSize,
gl::DrawElementsType indexType);
private:
IndexBuffer *mIndexBuffer;
unsigned int mWritePosition;
bool mDynamic;
};
class StreamingIndexBufferInterface : public IndexBufferInterface
{
public:
explicit StreamingIndexBufferInterface(BufferFactoryD3D *factory);
~StreamingIndexBufferInterface() override;
angle::Result reserveBufferSpace(const gl::Context *context,
unsigned int size,
gl::DrawElementsType indexType) override;
};
class StaticIndexBufferInterface : public IndexBufferInterface
{
public:
explicit StaticIndexBufferInterface(BufferFactoryD3D *factory);
~StaticIndexBufferInterface() override;
angle::Result reserveBufferSpace(const gl::Context *context,
unsigned int size,
gl::DrawElementsType indexType) override;
};
} // namespace rx
#endif // LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_
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