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//
// Copyright (c) 2002-2014 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.
//
// IndexDataManager.h: Defines the IndexDataManager, a class that
// runs the Buffer translation process for index buffers.
#ifndef LIBANGLE_INDEXDATAMANAGER_H_
#define LIBANGLE_INDEXDATAMANAGER_H_
#include <GLES2/gl2.h>
#include "common/angleutils.h"
#include "common/mathutil.h"
#include "libANGLE/Error.h"
#include "libANGLE/renderer/d3d/RendererD3D.h"
namespace
{
enum
{
INITIAL_INDEX_BUFFER_SIZE = 4096 * sizeof(GLuint)
};
}
namespace gl
{
class Buffer;
}
namespace rx
{
class IndexBufferInterface;
class StaticIndexBufferInterface;
class StreamingIndexBufferInterface;
class IndexBuffer;
class BufferD3D;
class RendererD3D;
struct SourceIndexData
{
BufferD3D *srcBuffer;
const void *srcIndices;
unsigned int srcCount;
gl::DrawElementsType srcIndexType;
bool srcIndicesChanged;
};
struct TranslatedIndexData
{
unsigned int startIndex;
unsigned int startOffset; // In bytes
IndexBuffer *indexBuffer;
BufferD3D *storage;
gl::DrawElementsType indexType;
unsigned int serial;
SourceIndexData srcIndexData;
};
class IndexDataManager : angle::NonCopyable
{
public:
explicit IndexDataManager(BufferFactoryD3D *factory);
virtual ~IndexDataManager();
void deinitialize();
angle::Result prepareIndexData(const gl::Context *context,
gl::DrawElementsType srcType,
gl::DrawElementsType dstType,
GLsizei count,
gl::Buffer *glBuffer,
const void *indices,
TranslatedIndexData *translated);
private:
angle::Result streamIndexData(const gl::Context *context,
const void *data,
unsigned int count,
gl::DrawElementsType srcType,
gl::DrawElementsType dstType,
bool usePrimitiveRestartFixedIndex,
TranslatedIndexData *translated);
angle::Result getStreamingIndexBuffer(const gl::Context *context,
gl::DrawElementsType destinationIndexType,
IndexBufferInterface **outBuffer);
using StreamingBuffer = std::unique_ptr<StreamingIndexBufferInterface>;
BufferFactoryD3D *const mFactory;
std::unique_ptr<StreamingIndexBufferInterface> mStreamingBufferShort;
std::unique_ptr<StreamingIndexBufferInterface> mStreamingBufferInt;
};
angle::Result GetIndexTranslationDestType(const gl::Context *context,
GLsizei indexCount,
gl::DrawElementsType indexType,
const void *indices,
bool usePrimitiveRestartWorkaround,
gl::DrawElementsType *destTypeOut);
ANGLE_INLINE bool IsOffsetAligned(gl::DrawElementsType elementType, unsigned int offset)
{
return (offset % gl::GetDrawElementsTypeSize(elementType) == 0);
}
} // namespace rx
#endif // LIBANGLE_INDEXDATAMANAGER_H_
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