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Viewing changes to Source/WebCore/platform/graphics/chromium/Canvas2DLayerManager.h

  • Committer: Package Import Robot
  • Author(s): Jonathan Riddell
  • Date: 2013-02-18 14:24:18 UTC
  • Revision ID: package-import@ubuntu.com-20130218142418-eon0jmjg3nj438uy
Tags: upstream-2.3
Import upstream version 2.3

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Source/WebCore/platform/graphics/chromium/Canvas2DLayerManager.h
 
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/*
 
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Copyright (C) 2012 Google Inc. All rights reserved.
 
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Redistribution and use in source and binary forms, with or without
 
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modification, are permitted provided that the following conditions
 
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are met:
 
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1.  Redistributions of source code must retain the above copyright
 
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    notice, this list of conditions and the following disclaimer.
 
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2.  Redistributions in binary form must reproduce the above copyright
 
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    notice, this list of conditions and the following disclaimer in the
 
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    documentation and/or other materials provided with the distribution.
 
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THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
 
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 
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DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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*/
 
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#ifndef Canvas2DLayerManager_h
 
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#define Canvas2DLayerManager_h
 
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#include "Canvas2DLayerBridge.h"
 
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#include <public/WebThread.h>
 
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class Canvas2DLayerManagerTest;
 
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namespace WebCore {
 
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class Canvas2DLayerManager : public WebKit::WebThread::TaskObserver {
 
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public:
 
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    static Canvas2DLayerManager& get();
 
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    void init(size_t maxBytesAllocated, size_t targetBytesAllocated);
 
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    virtual ~Canvas2DLayerManager();
 
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    void layerAllocatedStorageChanged(Canvas2DLayerBridge*, intptr_t deltaBytes);
 
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    void layerDidDraw(Canvas2DLayerBridge*);
 
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    void layerToBeDestroyed(Canvas2DLayerBridge*);
 
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private:
 
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    Canvas2DLayerManager();
 
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    // internal methods
 
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    void freeMemoryIfNecessary();
 
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    bool isInList(Canvas2DLayerBridge*);
 
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    void addLayerToList(Canvas2DLayerBridge*);
 
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    void removeLayerFromList(Canvas2DLayerBridge*);
 
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    virtual void willProcessTask() OVERRIDE;
 
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    virtual void didProcessTask() OVERRIDE;
 
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    size_t m_bytesAllocated;
 
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    size_t m_maxBytesAllocated;
 
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    size_t m_targetBytesAllocated;
 
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    bool m_taskObserverActive;
 
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    DoublyLinkedList<Canvas2DLayerBridge> m_layerList;
 
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    friend class ::Canvas2DLayerManagerTest; // for unit testing
 
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};
 
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}
 
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#endif
 
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