/* * Copyright (C) 2011 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef DrawingAreaImpl_h #define DrawingAreaImpl_h #include "DrawingArea.h" #include "LayerTreeHost.h" #include #include namespace WebCore { class GraphicsContext; } namespace WebKit { class ShareableBitmap; class UpdateInfo; class DrawingAreaImpl : public DrawingArea { public: DrawingAreaImpl(WebPage&, const WebPageCreationParameters&); virtual ~DrawingAreaImpl(); void layerHostDidFlushLayers(); private: // DrawingArea virtual void setNeedsDisplay() override; virtual void setNeedsDisplayInRect(const WebCore::IntRect&) override; virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta); virtual void pageBackgroundTransparencyChanged() override; virtual void setLayerTreeStateIsFrozen(bool); virtual bool layerTreeStateIsFrozen() const { return m_layerTreeStateIsFrozen; } virtual LayerTreeHost* layerTreeHost() const { return m_layerTreeHost.get(); } virtual void forceRepaint(); virtual bool forceRepaintAsync(uint64_t callbackID); virtual void didInstallPageOverlay(PageOverlay*); virtual void didUninstallPageOverlay(PageOverlay*); virtual void setPageOverlayNeedsDisplay(PageOverlay*, const WebCore::IntRect&); virtual void setPageOverlayOpacity(PageOverlay*, float); virtual void setPaintingEnabled(bool); virtual void updatePreferences(const WebPreferencesStore&) override; virtual WebCore::GraphicsLayerFactory* graphicsLayerFactory() override; virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) override; virtual void scheduleCompositingLayerFlush() override; virtual void scheduleCompositingLayerFlushImmediately() override; // IPC message handlers. virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset); virtual void didUpdate(); virtual void suspendPainting(); virtual void resumePainting(); void sendDidUpdateBackingStoreState(); void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*); void exitAcceleratedCompositingModeSoon(); bool exitAcceleratedCompositingModePending() const { return m_exitCompositingTimer.isActive(); } void exitAcceleratedCompositingMode(); void scheduleDisplay(); void displayTimerFired(); void display(); void display(UpdateInfo&); uint64_t m_backingStoreStateID; WebCore::Region m_dirtyRegion; WebCore::IntRect m_scrollRect; WebCore::IntSize m_scrollOffset; // Whether painting is enabled. If painting is disabled, any calls to setNeedsDisplay and scroll are ignored. bool m_isPaintingEnabled; // Whether we're currently processing an UpdateBackingStoreState message. bool m_inUpdateBackingStoreState; // When true, we should send an UpdateBackingStoreState message instead of any other messages // we normally send to the UI process. bool m_shouldSendDidUpdateBackingStoreState; // Whether we're waiting for a DidUpdate message. Used for throttling paints so that the // web process won't paint more frequent than the UI process can handle. bool m_isWaitingForDidUpdate; // True between sending the 'enter compositing' messages, and the 'exit compositing' message. bool m_compositingAccordingToProxyMessages; // When true, we maintain the layer tree in its current state by not leaving accelerated compositing mode // and not scheduling layer flushes. bool m_layerTreeStateIsFrozen; // True when we were asked to exit accelerated compositing mode but couldn't because layer tree // state was frozen. bool m_wantsToExitAcceleratedCompositingMode; // Whether painting is suspended. We'll still keep track of the dirty region but we // won't paint until painting has resumed again. bool m_isPaintingSuspended; bool m_alwaysUseCompositing; RunLoop::Timer m_displayTimer; RunLoop::Timer m_exitCompositingTimer; // The layer tree host that handles accelerated compositing. RefPtr m_layerTreeHost; }; } // namespace WebKit #endif // DrawingAreaImpl_h