1 /* 2 * Copyright (C) 2012 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 StyleFetchedImageSet_h 27 #define StyleFetchedImageSet_h 28 29 #include "core/fetch/ImageResourceClient.h" 30 #include "core/fetch/ResourcePtr.h" 31 #include "core/rendering/style/StyleImage.h" 32 #include "platform/geometry/LayoutSize.h" 33 34 namespace WebCore { 35 36 class ImageResource; 37 class CSSImageSetValue; 38 39 // This class keeps one cached image and has access to a set of alternatives. 40 41 class StyleFetchedImageSet FINAL : public StyleImage, private ImageResourceClient { 42 WTF_MAKE_FAST_ALLOCATED; 43 public: create(ImageResource * image,float imageScaleFactor,CSSImageSetValue * value)44 static PassRefPtr<StyleFetchedImageSet> create(ImageResource* image, float imageScaleFactor, CSSImageSetValue* value) 45 { 46 return adoptRef(new StyleFetchedImageSet(image, imageScaleFactor, value)); 47 } 48 virtual ~StyleFetchedImageSet(); 49 50 virtual PassRefPtrWillBeRawPtr<CSSValue> cssValue() const OVERRIDE; 51 52 // FIXME: This is used by StyleImage for equals comparison, but this implementation 53 // only looks at the image from the set that we have loaded. I'm not sure if that is 54 // meaningful enough or not. data()55 virtual WrappedImagePtr data() const OVERRIDE { return m_bestFitImage.get(); } 56 clearImageSetValue()57 void clearImageSetValue() { m_imageSetValue = 0; } 58 59 virtual bool canRender(const RenderObject&, float multiplier) const OVERRIDE; 60 virtual bool isLoaded() const OVERRIDE; 61 virtual bool errorOccurred() const OVERRIDE; 62 virtual LayoutSize imageSize(const RenderObject*, float multiplier) const OVERRIDE; 63 virtual bool imageHasRelativeWidth() const OVERRIDE; 64 virtual bool imageHasRelativeHeight() const OVERRIDE; 65 virtual void computeIntrinsicDimensions(const RenderObject*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) OVERRIDE; 66 virtual bool usesImageContainerSize() const OVERRIDE; 67 virtual void setContainerSizeForRenderer(const RenderObject*, const IntSize&, float) OVERRIDE; 68 virtual void addClient(RenderObject*) OVERRIDE; 69 virtual void removeClient(RenderObject*) OVERRIDE; 70 virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) const OVERRIDE; imageScaleFactor()71 virtual float imageScaleFactor() const OVERRIDE { return m_imageScaleFactor; } 72 virtual bool knownToBeOpaque(const RenderObject*) const OVERRIDE; cachedImage()73 virtual ImageResource* cachedImage() const OVERRIDE { return m_bestFitImage.get(); } 74 75 private: 76 StyleFetchedImageSet(ImageResource*, float imageScaleFactor, CSSImageSetValue*); 77 78 ResourcePtr<ImageResource> m_bestFitImage; 79 float m_imageScaleFactor; 80 81 // FIXME: oilpan: Change to RawPtrWillBeMember when moving this class onto oilpan heap. 82 // Also add "if !ENABLE(OILPAN)" around clearImageSetValue above as well as around its 83 // caller since it should not be needed once both of the objects are on the heap and 84 // oilpan is enabled. 85 CSSImageSetValue* m_imageSetValue; // Not retained; it owns us. 86 }; 87 88 DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleFetchedImageSet, isImageResourceSet()); 89 90 } // namespace WebCore 91 92 #endif // StyleFetchedImageSet_h 93