2 * Copyright (C) 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
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11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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26 #ifndef DrawingAreaProxyImpl_h
27 #define DrawingAreaProxyImpl_h
29 #include "BackingStore.h"
30 #include "DrawingAreaProxy.h"
31 #include "LayerTreeContext.h"
32 #include <WebCore/RunLoop.h>
33 #include <wtf/OwnPtr.h>
34 #include <wtf/PassOwnPtr.h>
36 #if ENABLE(TIZEN_WEBKIT2_TILED_AC)
46 class LayerTreeCoordinatorProxy;
48 class DrawingAreaProxyImpl : public DrawingAreaProxy {
50 static PassOwnPtr<DrawingAreaProxyImpl> create(WebPageProxy*);
51 virtual ~DrawingAreaProxyImpl();
53 void paint(BackingStore::PlatformGraphicsContext, const WebCore::IntRect&, WebCore::Region& unpaintedRegion);
55 #if ENABLE(TIZEN_WEBKIT2_TILED_AC)
56 virtual void didSuspendPainting();
60 explicit DrawingAreaProxyImpl(WebPageProxy*);
63 virtual void sizeDidChange();
64 virtual void deviceScaleFactorDidChange();
65 virtual void layerHostingModeDidChange() OVERRIDE;
67 virtual void visibilityDidChange();
68 virtual void setBackingStoreIsDiscardable(bool);
69 virtual void waitForBackingStoreUpdateOnNextPaint();
71 // CoreIPC message handlers
72 virtual void update(uint64_t backingStoreStateID, const UpdateInfo&);
73 virtual void didUpdateBackingStoreState(uint64_t backingStoreStateID, const UpdateInfo&, const LayerTreeContext&);
74 virtual void enterAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext&);
75 virtual void exitAcceleratedCompositingMode(uint64_t backingStoreStateID, const UpdateInfo&);
76 virtual void updateAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext&);
78 void incorporateUpdate(const UpdateInfo&);
80 enum RespondImmediatelyOrNot { DoNotRespondImmediately, RespondImmediately };
81 void backingStoreStateDidChange(RespondImmediatelyOrNot);
82 void sendUpdateBackingStoreState(RespondImmediatelyOrNot);
83 void waitForAndDispatchDidUpdateBackingStoreState();
85 #if USE(ACCELERATED_COMPOSITING)
86 void enterAcceleratedCompositingMode(const LayerTreeContext&);
87 void exitAcceleratedCompositingMode();
88 void updateAcceleratedCompositingMode(const LayerTreeContext&);
90 bool isInAcceleratedCompositingMode() const { return !m_layerTreeContext.isEmpty(); }
92 #if USE(UI_SIDE_COMPOSITING)
93 virtual void setVisibleContentsRect(const WebCore::IntRect& visibleContentsRect, float scale, const WebCore::FloatPoint& trajectory, const WebCore::FloatPoint& accurateVisibleContentsPosition = WebCore::FloatPoint());
94 void didReceiveLayerTreeCoordinatorProxyMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
95 #if ENABLE(TIZEN_CSS_OVERFLOW_SCROLL_ACCELERATION_ON_UI_SIDE)
96 virtual void setVisibleContentsRectForScrollingContentsLayers(const WebCore::IntRect&);
100 bool isInAcceleratedCompositingMode() const { return false; }
103 virtual void pageCustomRepresentationChanged();
105 void discardBackingStoreSoon();
106 void discardBackingStore();
108 // The state ID corresponding to our current backing store. Updated whenever we allocate
109 // a new backing store. Any messages received that correspond to an earlier state are ignored,
110 // as they don't apply to our current backing store.
111 uint64_t m_currentBackingStoreStateID;
113 // The next backing store state ID we will request the web process update to. Incremented
114 // whenever our state changes in a way that will require a new backing store to be allocated.
115 uint64_t m_nextBackingStoreStateID;
117 #if USE(ACCELERATED_COMPOSITING)
118 // The current layer tree context.
119 LayerTreeContext m_layerTreeContext;
122 // Whether we've sent a UpdateBackingStoreState message and are now waiting for a DidUpdateBackingStoreState message.
123 // Used to throttle UpdateBackingStoreState messages so we don't send them faster than the Web process can handle.
124 bool m_isWaitingForDidUpdateBackingStoreState;
126 // For a new Drawing Area don't draw anything until the WebProcess has sent over the first content.
127 bool m_hasReceivedFirstUpdate;
129 bool m_isBackingStoreDiscardable;
130 OwnPtr<BackingStore> m_backingStore;
132 WebCore::RunLoop::Timer<DrawingAreaProxyImpl> m_discardBackingStoreTimer;
135 } // namespace WebKit
137 #endif // DrawingAreaProxyImpl_h