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//
// Copyright (c) 2002-2010 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.
//
// geometry/IndexDataManager.h: Defines the IndexDataManager, a class that
// runs the Buffer translation process for index buffers.
#ifndef LIBGLESV2_GEOMETRY_INDEXDATAMANAGER_H_
#define LIBGLESV2_GEOMETRY_INDEXDATAMANAGER_H_
#include <vector>
#include <cstddef>
#define GL_APICALL
#include <GLES2/gl2.h>
#include "libGLESv2/Context.h"
namespace gl
{
struct TranslatedIndexData
{
UINT minIndex;
UINT maxIndex;
UINT startIndex;
IDirect3DIndexBuffer9 *indexBuffer;
};
class IndexBuffer
{
public:
IndexBuffer(IDirect3DDevice9 *device, UINT size, D3DFORMAT format);
virtual ~IndexBuffer();
UINT size() const { return mBufferSize; }
virtual void *map(UINT requiredSpace, UINT *offset) = 0;
void unmap();
virtual void reserveSpace(UINT requiredSpace, GLenum type) = 0;
IDirect3DIndexBuffer9 *getBuffer() const;
protected:
IDirect3DDevice9 *const mDevice;
IDirect3DIndexBuffer9 *mIndexBuffer;
UINT mBufferSize;
private:
DISALLOW_COPY_AND_ASSIGN(IndexBuffer);
};
class StreamingIndexBuffer : public IndexBuffer
{
public:
StreamingIndexBuffer(IDirect3DDevice9 *device, UINT initialSize, D3DFORMAT format);
~StreamingIndexBuffer();
void *map(UINT requiredSpace, UINT *offset);
void reserveSpace(UINT requiredSpace, GLenum type);
private:
UINT mWritePosition;
};
class StaticIndexBuffer : public IndexBuffer
{
public:
explicit StaticIndexBuffer(IDirect3DDevice9 *device);
~StaticIndexBuffer();
void *map(UINT requiredSpace, UINT *offset);
void reserveSpace(UINT requiredSpace, GLenum type);
bool lookupType(GLenum type);
UINT lookupRange(intptr_t offset, GLsizei count, UINT *minIndex, UINT *maxIndex); // Returns the offset into the index buffer, or -1 if not found
void addRange(intptr_t offset, GLsizei count, UINT minIndex, UINT maxIndex, UINT streamOffset);
private:
GLenum mCacheType;
struct IndexRange
{
intptr_t offset;
GLsizei count;
UINT minIndex;
UINT maxIndex;
UINT streamOffset;
};
std::vector<IndexRange> mCache;
};
class IndexDataManager
{
public:
IndexDataManager(Context *context, IDirect3DDevice9 *evice);
virtual ~IndexDataManager();
GLenum prepareIndexData(GLenum type, GLsizei count, Buffer *arrayElementBuffer, const void *indices, TranslatedIndexData *translated);
private:
DISALLOW_COPY_AND_ASSIGN(IndexDataManager);
std::size_t typeSize(GLenum type) const;
std::size_t indexSize(D3DFORMAT format) const;
IDirect3DDevice9 *const mDevice;
StreamingIndexBuffer *mStreamingBufferShort;
StreamingIndexBuffer *mStreamingBufferInt;
};
}
#endif // LIBGLESV2_GEOMETRY_INDEXDATAMANAGER_H_
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