Home | History | Annotate | Download | only in graphics 
      1 /*
      2  * Copyright (C) 2012 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef Canvas2DLayerBridge_h
     27 #define Canvas2DLayerBridge_h
     28 
     29 #include "SkDeferredCanvas.h"
     30 #include "SkImage.h"
     31 #include "platform/PlatformExport.h"
     32 #include "platform/geometry/IntSize.h"
     33 #include "platform/graphics/GraphicsContext3D.h"
     34 #include "platform/graphics/ImageBufferSurface.h"
     35 #include "public/platform/WebExternalTextureLayer.h"
     36 #include "public/platform/WebExternalTextureLayerClient.h"
     37 #include "public/platform/WebExternalTextureMailbox.h"
     38 #include "wtf/DoublyLinkedList.h"
     39 #include "wtf/PassOwnPtr.h"
     40 #include "wtf/RefCounted.h"
     41 #include "wtf/RefPtr.h"
     42 
     43 namespace blink {
     44 class WebGraphicsContext3D;
     45 }
     46 
     47 class Canvas2DLayerBridgeTest;
     48 
     49 namespace WebCore {
     50 
     51 class PLATFORM_EXPORT Canvas2DLayerBridge : public blink::WebExternalTextureLayerClient, public SkDeferredCanvas::NotificationClient, public DoublyLinkedListNode<Canvas2DLayerBridge>, public RefCounted<Canvas2DLayerBridge> {
     52     WTF_MAKE_NONCOPYABLE(Canvas2DLayerBridge);
     53 public:
     54     static PassRefPtr<Canvas2DLayerBridge> create(const IntSize&, OpacityMode, int msaaSampleCount);
     55     virtual ~Canvas2DLayerBridge();
     56 
     57     // blink::WebExternalTextureLayerClient implementation.
     58     virtual blink::WebGraphicsContext3D* context() OVERRIDE;
     59     virtual bool prepareMailbox(blink::WebExternalTextureMailbox*, blink::WebExternalBitmap*) OVERRIDE;
     60     virtual void mailboxReleased(const blink::WebExternalTextureMailbox&) OVERRIDE;
     61 
     62     // SkDeferredCanvas::NotificationClient implementation
     63     virtual void prepareForDraw() OVERRIDE;
     64     virtual void storageAllocatedForRecordingChanged(size_t) OVERRIDE;
     65     virtual void flushedDrawCommands() OVERRIDE;
     66     virtual void skippedPendingDrawCommands() OVERRIDE;
     67 
     68     // ImageBufferSurface implementation
     69     void willUse();
     70     SkCanvas* canvas() const { return m_canvas.get(); }
     71     bool isValid();
     72     blink::WebLayer* layer() const;
     73     Platform3DObject getBackingTexture();
     74     bool isAccelerated() const { return true; }
     75 
     76     // Methods used by Canvas2DLayerManager
     77     virtual size_t freeMemoryIfPossible(size_t); // virtual for mocking
     78     virtual void flush(); // virtual for mocking
     79     virtual size_t storageAllocatedForRecording(); // virtual for faking
     80     size_t bytesAllocated() const {return m_bytesAllocated;}
     81     void limitPendingFrames();
     82 
     83     void beginDestruction();
     84 
     85 protected:
     86     Canvas2DLayerBridge(PassRefPtr<GraphicsContext3D>, PassOwnPtr<SkDeferredCanvas>, int, OpacityMode);
     87     void setRateLimitingEnabled(bool);
     88 
     89     OwnPtr<SkDeferredCanvas> m_canvas;
     90     OwnPtr<blink::WebExternalTextureLayer> m_layer;
     91     RefPtr<GraphicsContext3D> m_context;
     92     int m_msaaSampleCount;
     93     size_t m_bytesAllocated;
     94     bool m_didRecordDrawCommand;
     95     bool m_surfaceIsValid;
     96     int m_framesPending;
     97     bool m_destructionInProgress;
     98     bool m_rateLimitingEnabled;
     99 
    100     friend class WTF::DoublyLinkedListNode<Canvas2DLayerBridge>;
    101     friend class ::Canvas2DLayerBridgeTest;
    102     Canvas2DLayerBridge* m_next;
    103     Canvas2DLayerBridge* m_prev;
    104 
    105     enum MailboxStatus {
    106         MailboxInUse,
    107         MailboxReleased,
    108         MailboxAvailable,
    109     };
    110 
    111     struct MailboxInfo {
    112         blink::WebExternalTextureMailbox m_mailbox;
    113         SkAutoTUnref<SkImage> m_image;
    114         MailboxStatus m_status;
    115         RefPtr<Canvas2DLayerBridge> m_parentLayerBridge;
    116 
    117         MailboxInfo(const MailboxInfo&);
    118         MailboxInfo() {}
    119     };
    120     MailboxInfo* createMailboxInfo();
    121 
    122     uint32_t m_lastImageId;
    123     Vector<MailboxInfo> m_mailboxes;
    124 };
    125 }
    126 #endif
    127