1 /* 2 * Copyright (C) 2011 Apple 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 * 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 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef DrawingAreaImpl_h 27 #define DrawingAreaImpl_h 28 29 #include "DrawingArea.h" 30 #include "LayerTreeHost.h" 31 #include "Region.h" 32 #include "RunLoop.h" 33 34 namespace WebKit { 35 36 class UpdateInfo; 37 38 class DrawingAreaImpl : public DrawingArea { 39 public: 40 static PassOwnPtr<DrawingAreaImpl> create(WebPage*, const WebPageCreationParameters&); 41 virtual ~DrawingAreaImpl(); 42 43 void setLayerHostNeedsDisplay(); 44 void layerHostDidFlushLayers(); 45 46 private: 47 DrawingAreaImpl(WebPage*, const WebPageCreationParameters&); 48 49 // DrawingArea 50 virtual void setNeedsDisplay(const WebCore::IntRect&); 51 virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset); 52 virtual void forceRepaint(); 53 54 virtual void didInstallPageOverlay(); 55 virtual void didUninstallPageOverlay(); 56 virtual void setPageOverlayNeedsDisplay(const WebCore::IntRect&); 57 58 virtual void setRootCompositingLayer(WebCore::GraphicsLayer*); 59 virtual void scheduleCompositingLayerSync(); 60 virtual void syncCompositingLayers(); 61 virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*); 62 63 // CoreIPC message handlers. 64 virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset); 65 virtual void didUpdate(); 66 virtual void suspendPainting(); 67 virtual void resumePainting(); 68 69 void sendDidUpdateBackingStoreState(); 70 71 void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*); 72 void exitAcceleratedCompositingModeSoon(); 73 void exitAcceleratedCompositingMode(); 74 75 void scheduleDisplay(); 76 void displayTimerFired(); 77 void display(); 78 void display(UpdateInfo&); 79 80 uint64_t m_backingStoreStateID; 81 82 Region m_dirtyRegion; 83 WebCore::IntRect m_scrollRect; 84 WebCore::IntSize m_scrollOffset; 85 86 // Whether we're currently processing an UpdateBackingStoreState message. 87 bool m_inUpdateBackingStoreState; 88 89 // When true, we should send an UpdateBackingStoreState message instead of any other messages 90 // we normally send to the UI process. 91 bool m_shouldSendDidUpdateBackingStoreState; 92 93 // Whether we're waiting for a DidUpdate message. Used for throttling paints so that the 94 // web process won't paint more frequent than the UI process can handle. 95 bool m_isWaitingForDidUpdate; 96 97 // Whether painting is suspended. We'll still keep track of the dirty region but we 98 // won't paint until painting has resumed again. 99 bool m_isPaintingSuspended; 100 bool m_alwaysUseCompositing; 101 102 double m_lastDisplayTime; 103 104 RunLoop::Timer<DrawingAreaImpl> m_displayTimer; 105 RunLoop::Timer<DrawingAreaImpl> m_exitCompositingTimer; 106 107 // The layer tree host that handles accelerated compositing. 108 RefPtr<LayerTreeHost> m_layerTreeHost; 109 }; 110 111 } // namespace WebKit 112 113 #endif // DrawingAreaImpl_h 114