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/*
* Copyright (C) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TextureManager_h
#define TextureManager_h
#include "GraphicsContext3D.h"
#include "IntRect.h"
#include "IntSize.h"
#include <wtf/HashMap.h>
#include <wtf/ListHashSet.h>
namespace WebCore {
typedef int TextureToken;
class TextureManager : public Noncopyable {
public:
static PassOwnPtr<TextureManager> create(GraphicsContext3D* context, size_t memoryLimitBytes, int maxTextureSize)
{
return adoptPtr(new TextureManager(context, memoryLimitBytes, maxTextureSize));
}
TextureToken getToken();
void releaseToken(TextureToken);
bool hasTexture(TextureToken);
unsigned requestTexture(TextureToken, IntSize, unsigned textureFormat, bool* newTexture = 0);
void protectTexture(TextureToken);
void unprotectTexture(TextureToken);
bool isProtected(TextureToken);
private:
TextureManager(GraphicsContext3D*, size_t memoryLimitBytes, int maxTextureSize);
struct TextureInfo {
IntSize size;
unsigned format;
unsigned textureId;
bool isProtected;
};
bool reduceMemoryToLimit(size_t);
void addTexture(TextureToken, TextureInfo);
void removeTexture(TextureToken, TextureInfo);
RefPtr<GraphicsContext3D> m_context;
typedef HashMap<TextureToken, TextureInfo> TextureMap;
TextureMap m_textures;
ListHashSet<TextureToken> m_textureLRUSet;
size_t m_memoryLimitBytes;
size_t m_memoryUseBytes;
int m_maxTextureSize;
TextureToken m_nextToken;
};
}
#endif
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