1 /* 2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) 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 TiledDrawingArea_h 27 #define TiledDrawingArea_h 28 29 #if ENABLE(TILED_BACKING_STORE) 30 31 #include "DrawingArea.h" 32 #include "RunLoop.h" 33 #include <WebCore/IntRect.h> 34 #include <wtf/Vector.h> 35 36 namespace WebKit { 37 38 class UpdateChunk; 39 40 class TiledDrawingArea : public DrawingArea { 41 public: 42 explicit TiledDrawingArea(WebPage*); 43 virtual ~TiledDrawingArea(); 44 45 virtual void setNeedsDisplay(const WebCore::IntRect&); 46 virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta); 47 virtual void display(); 48 49 #if USE(ACCELERATED_COMPOSITING) attachCompositingContext()50 virtual void attachCompositingContext() { } detachCompositingContext()51 virtual void detachCompositingContext() { } setRootCompositingLayer(WebCore::GraphicsLayer *)52 virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) { } scheduleCompositingLayerSync()53 virtual void scheduleCompositingLayerSync() { } syncCompositingLayers()54 virtual void syncCompositingLayers() { } 55 #endif 56 57 virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*); 58 59 private: 60 void scheduleDisplay(); 61 62 // CoreIPC message handlers. 63 void setSize(const WebCore::IntSize& viewSize); 64 void suspendPainting(); 65 void resumePainting(); 66 void didUpdate(); 67 void updateTile(int tileID, const WebCore::IntRect& dirtyRect, float scale); 68 69 // Platform overrides 70 void paintIntoUpdateChunk(UpdateChunk*, float scale); 71 72 void tileUpdateTimerFired(); 73 74 WebCore::IntRect m_dirtyRect; 75 bool m_isWaitingForUpdate; 76 bool m_shouldPaint; 77 RunLoop::Timer<TiledDrawingArea> m_displayTimer; 78 79 struct TileUpdate { 80 int tileID; 81 WebCore::IntRect dirtyRect; 82 float scale; 83 }; 84 typedef HashMap<int, TileUpdate> UpdateMap; 85 UpdateMap m_pendingUpdates; 86 RunLoop::Timer<TiledDrawingArea> m_tileUpdateTimer; 87 }; 88 89 } // namespace WebKit 90 91 #endif // TILED_BACKING_STORE 92 93 #endif // TiledDrawingArea_h 94