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 <WebCore/Region.h> 32#include <WebCore/RunLoop.h> 33 34namespace WebCore { 35 class GraphicsContext; 36} 37 38namespace WebKit { 39 40class ShareableBitmap; 41class UpdateInfo; 42 43class DrawingAreaImpl : public DrawingArea { 44public: 45 static PassOwnPtr<DrawingAreaImpl> create(WebPage*, const WebPageCreationParameters&); 46 virtual ~DrawingAreaImpl(); 47 48 void layerHostDidFlushLayers(); 49 50private: 51 DrawingAreaImpl(WebPage*, const WebPageCreationParameters&); 52 53 // DrawingArea 54 virtual void setNeedsDisplay() OVERRIDE; 55 virtual void setNeedsDisplayInRect(const WebCore::IntRect&) OVERRIDE; 56 virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta); 57 virtual void pageBackgroundTransparencyChanged() OVERRIDE; 58 virtual void setLayerTreeStateIsFrozen(bool); 59 virtual bool layerTreeStateIsFrozen() const { return m_layerTreeStateIsFrozen; } 60 virtual LayerTreeHost* layerTreeHost() const { return m_layerTreeHost.get(); } 61 virtual void forceRepaint(); 62 virtual bool forceRepaintAsync(uint64_t callbackID); 63 64 virtual void didInstallPageOverlay(PageOverlay*); 65 virtual void didUninstallPageOverlay(PageOverlay*); 66 virtual void setPageOverlayNeedsDisplay(PageOverlay*, const WebCore::IntRect&); 67 virtual void setPageOverlayOpacity(PageOverlay*, float); 68 virtual bool pageOverlayShouldApplyFadeWhenPainting() const; 69 70 virtual void setPaintingEnabled(bool); 71 virtual void updatePreferences(const WebPreferencesStore&) OVERRIDE; 72 73#if USE(ACCELERATED_COMPOSITING) 74 virtual WebCore::GraphicsLayerFactory* graphicsLayerFactory() OVERRIDE; 75 virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) OVERRIDE; 76 virtual void scheduleCompositingLayerFlush() OVERRIDE; 77#endif 78 79#if PLATFORM(MAC) 80 virtual void setLayerHostingMode(uint32_t) OVERRIDE; 81#endif 82 83#if USE(COORDINATED_GRAPHICS) 84 virtual void didReceiveCoordinatedLayerTreeHostMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&); 85#endif 86 87 // CoreIPC message handlers. 88 virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset); 89 virtual void didUpdate(); 90 virtual void suspendPainting(); 91 virtual void resumePainting(); 92 93 virtual void pageCustomRepresentationChanged(); 94 95 void sendDidUpdateBackingStoreState(); 96 97 void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*); 98 void exitAcceleratedCompositingModeSoon(); 99 bool exitAcceleratedCompositingModePending() const { return m_exitCompositingTimer.isActive(); } 100 void exitAcceleratedCompositingMode(); 101 102 void scheduleDisplay(); 103 void displayTimerFired(); 104 void display(); 105 void display(UpdateInfo&); 106 107 uint64_t m_backingStoreStateID; 108 109 WebCore::Region m_dirtyRegion; 110 WebCore::IntRect m_scrollRect; 111 WebCore::IntSize m_scrollOffset; 112 113 // Whether painting is enabled. If painting is disabled, any calls to setNeedsDisplay and scroll are ignored. 114 bool m_isPaintingEnabled; 115 116 // Whether we're currently processing an UpdateBackingStoreState message. 117 bool m_inUpdateBackingStoreState; 118 119 // When true, we should send an UpdateBackingStoreState message instead of any other messages 120 // we normally send to the UI process. 121 bool m_shouldSendDidUpdateBackingStoreState; 122 123 // Whether we're waiting for a DidUpdate message. Used for throttling paints so that the 124 // web process won't paint more frequent than the UI process can handle. 125 bool m_isWaitingForDidUpdate; 126 127 // True between sending the 'enter compositing' messages, and the 'exit compositing' message. 128 bool m_compositingAccordingToProxyMessages; 129 130 // When true, we maintain the layer tree in its current state by not leaving accelerated compositing mode 131 // and not scheduling layer flushes. 132 bool m_layerTreeStateIsFrozen; 133 134 // True when we were asked to exit accelerated compositing mode but couldn't because layer tree 135 // state was frozen. 136 bool m_wantsToExitAcceleratedCompositingMode; 137 138 // Whether painting is suspended. We'll still keep track of the dirty region but we 139 // won't paint until painting has resumed again. 140 bool m_isPaintingSuspended; 141 bool m_alwaysUseCompositing; 142 143 WebCore::RunLoop::Timer<DrawingAreaImpl> m_displayTimer; 144 WebCore::RunLoop::Timer<DrawingAreaImpl> m_exitCompositingTimer; 145 146 // The layer tree host that handles accelerated compositing. 147 RefPtr<LayerTreeHost> m_layerTreeHost; 148}; 149 150} // namespace WebKit 151 152#endif // DrawingAreaImpl_h 153