1/* 2 * Copyright (C) 2008, 2011, 2012, 2013 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. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef CSSImageGeneratorValue_h 27#define CSSImageGeneratorValue_h 28 29#include "CSSValue.h" 30#include "FloatSize.h" 31#include "FloatSizeHash.h" 32#include "Timer.h" 33#include <wtf/HashCountedSet.h> 34 35namespace WebCore { 36 37class CachedImage; 38class CachedResourceLoader; 39class GeneratedImage; 40class Image; 41class RenderElement; 42class StyleResolver; 43 44class CSSImageGeneratorValue : public CSSValue { 45public: 46 ~CSSImageGeneratorValue(); 47 48 void addClient(RenderElement*); 49 void removeClient(RenderElement*); 50 51 PassRefPtr<Image> image(RenderElement*, const FloatSize&); 52 53 bool isFixedSize() const; 54 FloatSize fixedSize(const RenderElement*); 55 56 bool isPending() const; 57 bool knownToBeOpaque(const RenderElement*) const; 58 59 void loadSubimages(CachedResourceLoader*); 60 61protected: 62 CSSImageGeneratorValue(ClassType); 63 64 GeneratedImage* cachedImageForSize(FloatSize); 65 void saveCachedImageForSize(FloatSize, PassRefPtr<GeneratedImage>); 66 const HashCountedSet<RenderElement*>& clients() const { return m_clients; } 67 68 // Helper functions for Crossfade and Filter. 69 static CachedImage* cachedImageForCSSValue(CSSValue*, CachedResourceLoader*); 70 static bool subimageIsPending(CSSValue*); 71 72private: 73 class CachedGeneratedImage { 74 public: 75 CachedGeneratedImage(CSSImageGeneratorValue&, FloatSize, PassRefPtr<GeneratedImage>); 76 GeneratedImage* image() { return m_image.get(); } 77 void puntEvictionTimer() { m_evictionTimer.restart(); } 78 79 private: 80 void evictionTimerFired(); 81 82 CSSImageGeneratorValue& m_owner; 83 FloatSize m_size; 84 RefPtr<GeneratedImage> m_image; 85 DeferrableOneShotTimer m_evictionTimer; 86 }; 87 88 friend class CachedGeneratedImage; 89 void evictCachedGeneratedImage(FloatSize); 90 91 HashCountedSet<RenderElement*> m_clients; 92 HashMap<FloatSize, std::unique_ptr<CachedGeneratedImage>> m_images; 93}; 94 95CSS_VALUE_TYPE_CASTS(CSSImageGeneratorValue, isImageGeneratorValue()) 96 97} // namespace WebCore 98 99#endif // CSSImageGeneratorValue_h 100