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 StyleCachedImageSet_h 27#define StyleCachedImageSet_h 28 29#if ENABLE(CSS_IMAGE_SET) 30 31#include "CachedImageClient.h" 32#include "CachedResourceHandle.h" 33#include "LayoutSize.h" 34#include "StyleImage.h" 35 36namespace WebCore { 37 38class CachedImage; 39class CSSImageSetValue; 40 41// This class keeps one cached image and has access to a set of alternatives. 42 43class StyleCachedImageSet final : public StyleImage, private CachedImageClient { 44 WTF_MAKE_FAST_ALLOCATED; 45public: 46 static PassRefPtr<StyleCachedImageSet> create(CachedImage* image, float imageScaleFactor, CSSImageSetValue* value) 47 { 48 return adoptRef(new StyleCachedImageSet(image, imageScaleFactor, value)); 49 } 50 virtual ~StyleCachedImageSet(); 51 52 virtual CachedImage* cachedImage() const override { return m_bestFitImage.get(); } 53 54 void clearImageSetValue() { m_imageSetValue = nullptr; } 55 56private: 57 virtual PassRefPtr<CSSValue> cssValue() const override; 58 59 // FIXME: This is used by StyleImage for equality comparison, but this implementation 60 // only looks at the image from the set that we have loaded. I'm not sure if that is 61 // meaningful enough or not. 62 virtual WrappedImagePtr data() const override { return m_bestFitImage.get(); } 63 64 virtual bool canRender(const RenderObject*, float multiplier) const override; 65 virtual bool isLoaded() const override; 66 virtual bool errorOccurred() const override; 67 virtual FloatSize imageSize(const RenderElement*, float multiplier) const override; 68 virtual bool imageHasRelativeWidth() const override; 69 virtual bool imageHasRelativeHeight() const override; 70 virtual void computeIntrinsicDimensions(const RenderElement*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override; 71 virtual bool usesImageContainerSize() const override; 72 virtual void setContainerSizeForRenderer(const RenderElement*, const FloatSize&, float) override; 73 virtual void addClient(RenderElement*) override; 74 virtual void removeClient(RenderElement*) override; 75 virtual PassRefPtr<Image> image(RenderElement*, const FloatSize&) const override; 76 virtual float imageScaleFactor() const override { return m_imageScaleFactor; } 77 virtual bool knownToBeOpaque(const RenderElement*) const override; 78 79 StyleCachedImageSet(CachedImage*, float imageScaleFactor, CSSImageSetValue*); 80 81 CachedResourceHandle<CachedImage> m_bestFitImage; 82 float m_imageScaleFactor; 83 CSSImageSetValue* m_imageSetValue; // Not retained; it owns us. 84}; 85 86STYLE_IMAGE_TYPE_CASTS(StyleCachedImageSet, StyleImage, isCachedImageSet) 87 88} // namespace WebCore 89 90#endif // ENABLE(CSS_IMAGE_SET) 91 92#endif // StyleCachedImageSet_h 93