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26 #ifndef Canvas2DLayerBridge_h
27 #define Canvas2DLayerBridge_h
29 #include "SkDeferredCanvas.h"
31 #include "platform/PlatformExport.h"
32 #include "platform/geometry/IntSize.h"
33 #include "platform/graphics/ImageBufferSurface.h"
34 #include "public/platform/WebExternalTextureLayer.h"
35 #include "public/platform/WebExternalTextureLayerClient.h"
36 #include "public/platform/WebExternalTextureMailbox.h"
37 #include "third_party/khronos/GLES2/gl2.h"
38 #include "wtf/DoublyLinkedList.h"
39 #include "wtf/PassOwnPtr.h"
40 #include "wtf/RefCounted.h"
41 #include "wtf/RefPtr.h"
44 class WebGraphicsContext3D;
45 class WebGraphicsContext3DProvider;
48 class Canvas2DLayerBridgeTest;
54 class PLATFORM_EXPORT Canvas2DLayerBridge : public blink::WebExternalTextureLayerClient, public SkDeferredCanvas::NotificationClient, public DoublyLinkedListNode<Canvas2DLayerBridge>, public RefCounted<Canvas2DLayerBridge> {
55 WTF_MAKE_NONCOPYABLE(Canvas2DLayerBridge);
57 static PassRefPtr<Canvas2DLayerBridge> create(const IntSize&, OpacityMode, int msaaSampleCount);
59 virtual ~Canvas2DLayerBridge();
61 // blink::WebExternalTextureLayerClient implementation.
62 virtual bool prepareMailbox(blink::WebExternalTextureMailbox*, blink::WebExternalBitmap*) OVERRIDE;
63 virtual void mailboxReleased(const blink::WebExternalTextureMailbox&) OVERRIDE;
65 // SkDeferredCanvas::NotificationClient implementation
66 virtual void prepareForDraw() OVERRIDE;
67 virtual void storageAllocatedForRecordingChanged(size_t) OVERRIDE;
68 virtual void flushedDrawCommands() OVERRIDE;
69 virtual void skippedPendingDrawCommands() OVERRIDE;
71 // ImageBufferSurface implementation
73 SkCanvas* canvas() const { return m_canvas.get(); }
74 bool checkSurfaceValid();
75 bool restoreSurface();
76 blink::WebLayer* layer() const;
77 Platform3DObject getBackingTexture();
78 bool isAccelerated() const { return true; }
79 void setIsHidden(bool);
80 void setImageBuffer(ImageBuffer* imageBuffer) { m_imageBuffer = imageBuffer; }
82 // Methods used by Canvas2DLayerManager
83 virtual size_t freeMemoryIfPossible(size_t); // virtual for mocking
84 virtual void flush(); // virtual for mocking
85 virtual size_t storageAllocatedForRecording(); // virtual for faking
86 size_t bytesAllocated() const { return m_bytesAllocated; }
87 void limitPendingFrames();
88 void freeReleasedMailbox();
89 bool hasReleasedMailbox() const;
90 void freeTransientResources();
91 bool hasTransientResources() const;
92 bool isHidden() { return m_isHidden; }
94 void beginDestruction();
97 Canvas2DLayerBridge(PassOwnPtr<blink::WebGraphicsContext3DProvider>, PassOwnPtr<SkDeferredCanvas>, int, OpacityMode);
98 void setRateLimitingEnabled(bool);
99 bool releasedMailboxHasExpired();
100 blink::WebGraphicsContext3D* context();
102 OwnPtr<SkDeferredCanvas> m_canvas;
103 OwnPtr<blink::WebExternalTextureLayer> m_layer;
104 OwnPtr<blink::WebGraphicsContext3DProvider> m_contextProvider;
105 ImageBuffer* m_imageBuffer;
106 int m_msaaSampleCount;
107 size_t m_bytesAllocated;
108 bool m_didRecordDrawCommand;
109 bool m_isSurfaceValid;
111 int m_framesSinceMailboxRelease;
112 bool m_destructionInProgress;
113 bool m_rateLimitingEnabled;
116 friend class WTF::DoublyLinkedListNode<Canvas2DLayerBridge>;
117 friend class ::Canvas2DLayerBridgeTest;
118 Canvas2DLayerBridge* m_next;
119 Canvas2DLayerBridge* m_prev;
128 blink::WebExternalTextureMailbox m_mailbox;
129 RefPtr<SkImage> m_image;
130 MailboxStatus m_status;
131 RefPtr<Canvas2DLayerBridge> m_parentLayerBridge;
133 MailboxInfo(const MailboxInfo&);
136 MailboxInfo* createMailboxInfo();
137 MailboxInfo* releasedMailboxInfo();
139 uint32_t m_lastImageId;
140 Vector<MailboxInfo> m_mailboxes;
141 int m_releasedMailboxInfoIndex;