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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 "platform/PlatformExport.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/ImageBufferSurface.h"
#include "public/platform/WebExternalTextureLayer.h"
#include "public/platform/WebExternalTextureLayerClient.h"
#include "public/platform/WebExternalTextureMailbox.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/utils/SkDeferredCanvas.h"
#include "wtf/Deque.h"
#include "wtf/DoublyLinkedList.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
class Canvas2DLayerBridgeTest;
namespace blink {
class ImageBuffer;
class WebGraphicsContext3D;
class WebGraphicsContext3DProvider;
class PLATFORM_EXPORT Canvas2DLayerBridge : public WebExternalTextureLayerClient, public SkDeferredCanvas::NotificationClient, public DoublyLinkedListNode<Canvas2DLayerBridge>, public RefCounted<Canvas2DLayerBridge> {
WTF_MAKE_NONCOPYABLE(Canvas2DLayerBridge);
public:
static PassRefPtr<Canvas2DLayerBridge> create(const IntSize&, OpacityMode, int msaaSampleCount);
virtual ~Canvas2DLayerBridge();
// WebExternalTextureLayerClient implementation.
virtual bool prepareMailbox(WebExternalTextureMailbox*, WebExternalBitmap*) override;
virtual void mailboxReleased(const WebExternalTextureMailbox&, bool lostResource) override;
// SkDeferredCanvas::NotificationClient implementation
virtual void prepareForDraw() override;
virtual void storageAllocatedForRecordingChanged(size_t) override;
virtual void flushedDrawCommands() override;
virtual void skippedPendingDrawCommands() override;
// ImageBufferSurface implementation
void finalizeFrame(const FloatRect &dirtyRect);
void willAccessPixels();
SkCanvas* canvas() const { return m_canvas.get(); }
bool checkSurfaceValid();
bool restoreSurface();
WebLayer* layer() const;
Platform3DObject getBackingTexture();
bool isAccelerated() const { return true; }
void setFilterLevel(SkPaint::FilterLevel);
void setIsHidden(bool);
void setImageBuffer(ImageBuffer* imageBuffer) { m_imageBuffer = imageBuffer; }
// 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();
void freeTransientResources();
bool hasTransientResources() const;
bool isHidden() { return m_isHidden; }
void beginDestruction();
PassRefPtr<SkImage> newImageSnapshot();
protected:
Canvas2DLayerBridge(PassOwnPtr<WebGraphicsContext3DProvider>, PassOwnPtr<SkDeferredCanvas>, PassRefPtr<SkSurface>, int, OpacityMode);
void setRateLimitingEnabled(bool);
WebGraphicsContext3D* context();
OwnPtr<SkDeferredCanvas> m_canvas;
RefPtr<SkSurface> m_surface;
OwnPtr<WebExternalTextureLayer> m_layer;
OwnPtr<WebGraphicsContext3DProvider> m_contextProvider;
ImageBuffer* m_imageBuffer;
int m_msaaSampleCount;
size_t m_bytesAllocated;
bool m_didRecordDrawCommand;
bool m_isSurfaceValid;
int m_framesPending;
int m_framesSinceMailboxRelease;
bool m_destructionInProgress;
bool m_rateLimitingEnabled;
SkPaint::FilterLevel m_filterLevel;
bool m_isHidden;
friend class WTF::DoublyLinkedListNode<Canvas2DLayerBridge>;
friend class ::Canvas2DLayerBridgeTest;
Canvas2DLayerBridge* m_next;
Canvas2DLayerBridge* m_prev;
struct MailboxInfo {
WebExternalTextureMailbox m_mailbox;
RefPtr<SkImage> m_image;
RefPtr<Canvas2DLayerBridge> m_parentLayerBridge;
MailboxInfo(const MailboxInfo&);
MailboxInfo() {}
};
uint32_t m_lastImageId;
enum {
// We should normally not have more that two active mailboxes at a time,
// but sometime we may have three due to the async nature of mailbox handling.
MaxActiveMailboxes = 3,
};
Deque<MailboxInfo, MaxActiveMailboxes> m_mailboxes;
GLenum m_lastFilter;
OpacityMode m_opacityMode;
};
} // namespace blink
#endif
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