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      1 /*
      2  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
      3  * Copyright (C) 2013 Apple Inc. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #include "config.h"
     22 #include "core/svg/graphics/SVGImageCache.h"
     23 
     24 #include "core/fetch/ImageResource.h"
     25 #include "core/frame/FrameView.h"
     26 #include "core/html/HTMLImageElement.h"
     27 #include "core/page/Page.h"
     28 #include "core/rendering/svg/RenderSVGRoot.h"
     29 #include "core/svg/graphics/SVGImage.h"
     30 #include "core/svg/graphics/SVGImageForContainer.h"
     31 #include "platform/graphics/GraphicsContext.h"
     32 #include "platform/graphics/ImageBuffer.h"
     33 
     34 namespace WebCore {
     35 
     36 SVGImageCache::SVGImageCache(SVGImage* svgImage)
     37     : m_svgImage(svgImage)
     38 {
     39     ASSERT(m_svgImage);
     40 }
     41 
     42 SVGImageCache::~SVGImageCache()
     43 {
     44     m_imageForContainerMap.clear();
     45 }
     46 
     47 void SVGImageCache::removeClientFromCache(const ImageResourceClient* client)
     48 {
     49     ASSERT(client);
     50     m_imageForContainerMap.remove(client);
     51 }
     52 
     53 void SVGImageCache::setContainerSizeForRenderer(const ImageResourceClient* client, const IntSize& containerSize, float containerZoom)
     54 {
     55     ASSERT(client);
     56     ASSERT(!containerSize.isEmpty());
     57     ASSERT(containerZoom);
     58 
     59     FloatSize containerSizeWithoutZoom(containerSize);
     60     containerSizeWithoutZoom.scale(1 / containerZoom);
     61 
     62     m_imageForContainerMap.set(client, SVGImageForContainer::create(m_svgImage, containerSizeWithoutZoom, containerZoom));
     63 }
     64 
     65 IntSize SVGImageCache::imageSizeForRenderer(const RenderObject* renderer) const
     66 {
     67     IntSize imageSize = m_svgImage->size();
     68     if (!renderer)
     69         return imageSize;
     70 
     71     ImageForContainerMap::const_iterator it = m_imageForContainerMap.find(renderer);
     72     if (it == m_imageForContainerMap.end())
     73         return imageSize;
     74 
     75     RefPtr<SVGImageForContainer> imageForContainer = it->value;
     76     ASSERT(!imageForContainer->size().isEmpty());
     77     return imageForContainer->size();
     78 }
     79 
     80 // FIXME: This doesn't take into account the animation timeline so animations will not
     81 // restart on page load, nor will two animations in different pages have different timelines.
     82 Image* SVGImageCache::imageForRenderer(const RenderObject* renderer)
     83 {
     84     if (!renderer)
     85         return Image::nullImage();
     86 
     87     ImageForContainerMap::iterator it = m_imageForContainerMap.find(renderer);
     88     if (it == m_imageForContainerMap.end())
     89         return Image::nullImage();
     90 
     91     RefPtr<SVGImageForContainer> imageForContainer = it->value;
     92     ASSERT(!imageForContainer->size().isEmpty());
     93 
     94     Node* node = renderer->node();
     95     if (node && isHTMLImageElement(node)) {
     96         const AtomicString& urlString = toHTMLImageElement(node)->imageSourceURL();
     97         KURL url = node->document().completeURL(urlString);
     98         imageForContainer->setURL(url);
     99     }
    100 
    101     return imageForContainer.get();
    102 }
    103 
    104 } // namespace WebCore
    105