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/*
* Copyright (C) 2012 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 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 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 Canvas2DLayerBridge_h
#define Canvas2DLayerBridge_h
#include "GraphicsContext3D.h"
#include "ImageBuffer.h" // For DeferralMode enum.
#include "IntSize.h"
#include "SkDeferredCanvas.h"
#include <public/WebExternalTextureLayer.h>
#include <public/WebExternalTextureLayerClient.h>
#include <wtf/DoublyLinkedList.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/RefPtr.h>
namespace WebKit {
class WebGraphicsContext3D;
}
namespace WebCore {
class LayerChromium;
class Canvas2DLayerBridge : public WebKit::WebExternalTextureLayerClient, public SkDeferredCanvas::NotificationClient, public DoublyLinkedListNode<Canvas2DLayerBridge> {
WTF_MAKE_NONCOPYABLE(Canvas2DLayerBridge);
public:
static PassOwnPtr<Canvas2DLayerBridge> create(PassRefPtr<GraphicsContext3D> context, const IntSize& size, DeferralMode deferralMode, unsigned textureId)
{
return adoptPtr(new Canvas2DLayerBridge(context, size, deferralMode, textureId));
}
virtual ~Canvas2DLayerBridge();
// WebKit::WebExternalTextureLayerClient implementation.
virtual unsigned prepareTexture(WebKit::WebTextureUpdater&) OVERRIDE;
virtual WebKit::WebGraphicsContext3D* context() OVERRIDE;
// SkDeferredCanvas::NotificationClient implementation
virtual void prepareForDraw() OVERRIDE;
virtual void storageAllocatedForRecordingChanged(size_t) OVERRIDE;
virtual void flushedDrawCommands() OVERRIDE;
virtual void skippedPendingDrawCommands() OVERRIDE;
// Methods used by Canvas2DLayerManager
virtual size_t freeMemoryIfPossible(size_t); // virtual for mocking
virtual void flush(); // virtual for mocking
virtual size_t storageAllocatedForRecording(); // virtual for faking
size_t bytesAllocated() const {return m_bytesAllocated;}
void limitPendingFrames();
SkCanvas* skCanvas(SkDevice*);
WebKit::WebLayer* layer();
void contextAcquired();
unsigned backBufferTexture();
protected:
Canvas2DLayerBridge(PassRefPtr<GraphicsContext3D>, const IntSize&, DeferralMode, unsigned textureId);
SkDeferredCanvas* deferredCanvas();
DeferralMode m_deferralMode;
bool m_useDoubleBuffering;
unsigned m_frontBufferTexture;
unsigned m_backBufferTexture;
IntSize m_size;
SkCanvas* m_canvas;
OwnPtr<WebKit::WebExternalTextureLayer> m_layer;
RefPtr<GraphicsContext3D> m_context;
size_t m_bytesAllocated;
bool m_didRecordDrawCommand;
int m_framesPending;
friend class WTF::DoublyLinkedListNode<Canvas2DLayerBridge>;
Canvas2DLayerBridge* m_next;
Canvas2DLayerBridge* m_prev;
};
}
#endif
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