Home | History | Annotate | Download | only in ca 
      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 LayerTreeHostCA_h
     27 #define LayerTreeHostCA_h
     28 
     29 #include "LayerTreeContext.h"
     30 #include "LayerTreeHost.h"
     31 #include <WebCore/GraphicsLayerClient.h>
     32 #include <wtf/OwnPtr.h>
     33 
     34 namespace WebKit {
     35 
     36 class LayerTreeHostCA : public LayerTreeHost, WebCore::GraphicsLayerClient {
     37 public:
     38     virtual ~LayerTreeHostCA();
     39 
     40 protected:
     41     explicit LayerTreeHostCA(WebPage*);
     42 
     43     WebCore::GraphicsLayer* rootLayer() const { return m_rootLayer.get(); }
     44 
     45     void initialize();
     46     void performScheduledLayerFlush();
     47 
     48     // LayerTreeHost.
     49     virtual void invalidate();
     50     virtual void sizeDidChange(const WebCore::IntSize& newSize);
     51     virtual void forceRepaint();
     52 
     53     // LayerTreeHostCA
     54     virtual void didPerformScheduledLayerFlush();
     55 
     56 private:
     57     // LayerTreeHost.
     58     virtual const LayerTreeContext& layerTreeContext();
     59     virtual void setShouldNotifyAfterNextScheduledLayerFlush(bool);
     60     virtual void setRootCompositingLayer(WebCore::GraphicsLayer*);
     61 
     62     virtual void setNonCompositedContentsNeedDisplay(const WebCore::IntRect&);
     63     virtual void scrollNonCompositedContents(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
     64 
     65     virtual void didInstallPageOverlay();
     66     virtual void didUninstallPageOverlay();
     67     virtual void setPageOverlayNeedsDisplay(const WebCore::IntRect&);
     68 
     69     // GraphicsLayerClient
     70     virtual void notifyAnimationStarted(const WebCore::GraphicsLayer*, double time);
     71     virtual void notifySyncRequired(const WebCore::GraphicsLayer*);
     72     virtual void paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext&, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& clipRect);
     73     virtual bool showDebugBorders() const;
     74     virtual bool showRepaintCounter() const;
     75 
     76     // LayerTreeHostCA
     77     virtual void platformInitialize(LayerTreeContext&) = 0;
     78 
     79     bool flushPendingLayerChanges();
     80 
     81     void createPageOverlayLayer();
     82     void destroyPageOverlayLayer();
     83 
     84     // The context for this layer tree.
     85     LayerTreeContext m_layerTreeContext;
     86 
     87     // Whether the layer tree host is valid or not.
     88     bool m_isValid;
     89 
     90     // Whether we should let the drawing area know the next time we've flushed
     91     // layer tree changes.
     92     bool m_notifyAfterScheduledLayerFlush;
     93 
     94     // The root layer.
     95     OwnPtr<WebCore::GraphicsLayer> m_rootLayer;
     96 
     97     // The layer which contains all non-composited content.
     98     OwnPtr<WebCore::GraphicsLayer> m_nonCompositedContentLayer;
     99 
    100     // The page overlay layer. Will be null if there's no page overlay.
    101     OwnPtr<WebCore::GraphicsLayer> m_pageOverlayLayer;
    102 };
    103 
    104 } // namespace WebKit
    105 
    106 #endif // LayerTreeHostCA_h
    107