1 /*

     2  * Copyright (C) 2010 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 LayerBackedDrawingArea_h

    27 #define LayerBackedDrawingArea_h

    28 

    29 #if USE(ACCELERATED_COMPOSITING)

    30 

    31 #include "DrawingArea.h"

    32 #include "RunLoop.h"

    33 #include <WebCore/IntPoint.h>

    34 #include <WebCore/GraphicsLayerClient.h>

    35 

    36 #if PLATFORM(MAC)

    37 #include <wtf/RetainPtr.h>

    38 #ifdef __OBJC__

    39 @class CALayer;

    40 #else

    41 class CALayer;

    42 #endif

    43 typedef struct __WKCARemoteLayerClientRef *WKCARemoteLayerClientRef;

    44 #endif

    45 

    46 namespace WebCore {

    47     class GraphicsContext;

    48     class GraphicsLayer;

    49     class IntRect;

    50 }

    51 

    52 namespace WebKit {

    53 

    54 class LayerBackedDrawingArea : public DrawingArea, private WebCore::GraphicsLayerClient {

    55 public:

    56     LayerBackedDrawingArea(WebPage*);

    57     virtual ~LayerBackedDrawingArea();

    58 

    59     virtual void invalidateWindow(const WebCore::IntRect& rect, bool immediate);

    60     virtual void invalidateContentsAndWindow(const WebCore::IntRect& rect, bool immediate);

    61     virtual void invalidateContentsForSlowScroll(const WebCore::IntRect& rect, bool immediate);

    62     virtual void scroll(const WebCore::IntSize& scrollDelta, const WebCore::IntRect& rectToScroll, const WebCore::IntRect& clipRect);

    63     virtual void setNeedsDisplay(const WebCore::IntRect&);

    64     virtual void display();

    65 

    66     virtual void attachCompositingContext();

    67     virtual void detachCompositingContext();

    68     virtual void setRootCompositingLayer(WebCore::GraphicsLayer*);

    69     virtual void scheduleCompositingLayerSync();

    70     virtual void syncCompositingLayers();

    71 

    72     virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder&);

    73 

    74 private:

    75 

    76     // GraphicsLayerClient

    77     virtual void notifyAnimationStarted(const WebCore::GraphicsLayer*, double /*time*/) { }

    78     virtual void notifySyncRequired(const WebCore::GraphicsLayer*) { }

    79 public:

    80     virtual void paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext&, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& inClip);

    81 private:

    82     virtual bool showDebugBorders() const;

    83     virtual bool showRepaintCounter() const;

    84 

    85     void scheduleDisplay();

    86     

    87     // CoreIPC message handlers.

    88     void setSize(const WebCore::IntSize& viewSize);

    89     void suspendPainting();

    90     void resumePainting();

    91     void didUpdate();

    92     

    93     void platformInit();

    94     void platformClear();

    95 

    96 #if PLATFORM(MAC)

    97     void setUpUpdateLayoutRunLoopObserver();

    98     void scheduleUpdateLayoutRunLoopObserver();

    99     void removeUpdateLayoutRunLoopObserver();

   100 

   101     static void updateLayoutRunLoopObserverCallback(CFRunLoopObserverRef, CFRunLoopActivity, void*);

   102     void updateLayoutRunLoopObserverFired();

   103 #endif

   104 

   105     RunLoop::Timer<LayerBackedDrawingArea> m_syncTimer;

   106 

   107     OwnPtr<WebCore::GraphicsLayer> m_backingLayer;

   108 #if PLATFORM(MAC)

   109 #if HAVE(HOSTED_CORE_ANIMATION)

   110     RetainPtr<WKCARemoteLayerClientRef> m_remoteLayerRef;

   111 #endif

   112     RetainPtr<CFRunLoopObserverRef> m_updateLayoutRunLoopObserver;

   113 #endif

   114 

   115     bool m_attached;

   116     bool m_shouldPaint;

   117 };

   118 

   119 } // namespace WebKit

   120 

   121 #endif // USE(ACCELERATED_COMPOSITING)

   122 

   123 #endif // LayerBackedDrawingArea_h