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      1 /*
      2  * Copyright (C) 2006 Eric Seidel <eric (at) webkit.org>
      3  * Copyright (C) 2009 Apple Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef SVGImage_h
     28 #define SVGImage_h
     29 
     30 #include "platform/graphics/Image.h"
     31 
     32 namespace WebCore {
     33 
     34 class Element;
     35 class FrameView;
     36 class ImageBuffer;
     37 class Page;
     38 class RenderBox;
     39 class SVGImageChromeClient;
     40 class SVGImageForContainer;
     41 
     42 class SVGImage : public Image {
     43 public:
     44     static PassRefPtr<SVGImage> create(ImageObserver* observer)
     45     {
     46         return adoptRef(new SVGImage(observer));
     47     }
     48 
     49     static bool isInSVGImage(const Element*);
     50 
     51     RenderBox* embeddedContentBox() const;
     52 
     53     virtual bool isSVGImage() const OVERRIDE { return true; }
     54     virtual IntSize size() const OVERRIDE { return m_intrinsicSize; }
     55 
     56     virtual bool currentFrameHasSingleSecurityOrigin() const OVERRIDE;
     57 
     58     virtual bool hasRelativeWidth() const OVERRIDE;
     59     virtual bool hasRelativeHeight() const OVERRIDE;
     60 
     61     virtual void startAnimation(bool /*catchUpIfNecessary*/ = true) OVERRIDE;
     62     virtual void stopAnimation() OVERRIDE;
     63     virtual void resetAnimation() OVERRIDE;
     64 
     65     virtual PassRefPtr<NativeImageSkia> nativeImageForCurrentFrame() OVERRIDE;
     66 
     67 private:
     68     friend class AXRenderObject;
     69     friend class SVGImageChromeClient;
     70     friend class SVGImageForContainer;
     71 
     72     virtual ~SVGImage();
     73 
     74     // Returns the SVG image document's frame.
     75     FrameView* frameView() const;
     76 
     77     virtual String filenameExtension() const OVERRIDE;
     78 
     79     virtual void setContainerSize(const IntSize&) OVERRIDE;
     80     IntSize containerSize() const;
     81     virtual bool usesContainerSize() const OVERRIDE { return true; }
     82     virtual void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) OVERRIDE;
     83 
     84     virtual bool dataChanged(bool allDataReceived) OVERRIDE;
     85 
     86     // FIXME: SVGImages are underreporting decoded sizes and will be unable
     87     // to prune because these functions are not implemented yet.
     88     virtual void destroyDecodedData(bool) OVERRIDE { }
     89 
     90     // FIXME: Implement this to be less conservative.
     91     virtual bool currentFrameKnownToBeOpaque() OVERRIDE { return false; }
     92 
     93     SVGImage(ImageObserver*);
     94     virtual void draw(GraphicsContext*, const FloatRect& fromRect, const FloatRect& toRect, CompositeOperator, blink::WebBlendMode) OVERRIDE;
     95     void drawForContainer(GraphicsContext*, const FloatSize, float, const FloatRect&, const FloatRect&, CompositeOperator, blink::WebBlendMode);
     96     void drawPatternForContainer(GraphicsContext*, const FloatSize, float, const FloatRect&, const FloatSize&, const FloatPoint&,
     97         CompositeOperator, const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing);
     98 
     99     OwnPtr<SVGImageChromeClient> m_chromeClient;
    100     OwnPtr<Page> m_page;
    101     IntSize m_intrinsicSize;
    102 };
    103 
    104 DEFINE_IMAGE_TYPE_CASTS(SVGImage);
    105 
    106 class ImageObserverDisabler {
    107     WTF_MAKE_NONCOPYABLE(ImageObserverDisabler);
    108 public:
    109     ImageObserverDisabler(Image* image)
    110         : m_image(image)
    111     {
    112         ASSERT(m_image->imageObserver());
    113         m_observer = m_image->imageObserver();
    114         m_image->setImageObserver(0);
    115     }
    116 
    117     ~ImageObserverDisabler()
    118     {
    119         m_image->setImageObserver(m_observer);
    120     }
    121 private:
    122     Image* m_image;
    123     ImageObserver* m_observer;
    124 };
    125 
    126 }
    127 
    128 #endif // SVGImage_h
    129