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      1 /*
      2  * Copyright (C) 2010 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 
     32 #ifndef ImageLayerChromium_h
     33 #define ImageLayerChromium_h
     34 
     35 #if USE(ACCELERATED_COMPOSITING)
     36 
     37 #include "ContentLayerChromium.h"
     38 #include "PlatformImage.h"
     39 
     40 #if USE(CG)
     41 #include <wtf/RetainPtr.h>
     42 #endif
     43 
     44 namespace WebCore {
     45 
     46 class Image;
     47 
     48 // A Layer that contains only an Image element.
     49 class ImageLayerChromium : public ContentLayerChromium {
     50 public:
     51     static PassRefPtr<ImageLayerChromium> create(GraphicsLayerChromium* owner = 0);
     52 
     53     virtual void paintContentsIfDirty(const IntRect& targetSurfaceRect);
     54     virtual void updateCompositorResources();
     55     virtual bool drawsContent() const { return m_contents; }
     56 
     57     void setContents(Image* image);
     58 
     59 protected:
     60     virtual const char* layerTypeAsString() const { return "ImageLayer"; }
     61 
     62     virtual TransformationMatrix tilingTransform();
     63     virtual IntRect layerBounds() const;
     64 
     65 private:
     66     ImageLayerChromium(GraphicsLayerChromium* owner);
     67 
     68     PlatformImage m_decodedImage;
     69     NativeImagePtr m_imageForCurrentFrame;
     70     RefPtr<Image> m_contents;
     71 };
     72 
     73 }
     74 #endif // USE(ACCELERATED_COMPOSITING)
     75 
     76 #endif
     77