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 COMPUTER, 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 COMPUTER, 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 "GeneratorGeneratedImage.h" 31#include "IntSizeHash.h" 32#include "Timer.h" 33#include <wtf/HashCountedSet.h> 34#include <wtf/RefPtr.h> 35 36namespace WebCore { 37 38class CachedResourceLoader; 39class GeneratorGeneratedImage; 40class RenderObject; 41class StyleResolver; 42 43class CSSImageGeneratorValue : public CSSValue { 44public: 45 ~CSSImageGeneratorValue(); 46 47 void addClient(RenderObject*); 48 void removeClient(RenderObject*); 49 50 PassRefPtr<Image> image(RenderObject*, const IntSize&); 51 52 bool isFixedSize() const; 53 IntSize fixedSize(const RenderObject*); 54 55 bool isPending() const; 56 bool knownToBeOpaque(const RenderObject*) const; 57 58 void loadSubimages(CachedResourceLoader*); 59 60protected: 61 CSSImageGeneratorValue(ClassType); 62 63 GeneratorGeneratedImage* cachedImageForSize(IntSize); 64 void saveCachedImageForSize(IntSize, PassRefPtr<GeneratorGeneratedImage>); 65 const HashCountedSet<RenderObject*>& clients() const { return m_clients; } 66 67private: 68 class CachedGeneratedImage { 69 public: 70 CachedGeneratedImage(CSSImageGeneratorValue&, IntSize, PassRefPtr<GeneratorGeneratedImage>); 71 GeneratorGeneratedImage* image() { return m_image.get(); } 72 void puntEvictionTimer() { m_evictionTimer.restart(); } 73 74 private: 75 void evictionTimerFired(DeferrableOneShotTimer<CachedGeneratedImage>*); 76 77 CSSImageGeneratorValue& m_owner; 78 IntSize m_size; 79 RefPtr<GeneratorGeneratedImage> m_image; 80 DeferrableOneShotTimer<CachedGeneratedImage> m_evictionTimer; 81 }; 82 83 friend class CachedGeneratedImage; 84 void evictCachedGeneratedImage(IntSize); 85 86 HashCountedSet<RenderObject*> m_clients; 87 HashMap<IntSize, OwnPtr<CachedGeneratedImage> > m_images; 88}; 89 90} // namespace WebCore 91 92#endif // CSSImageGeneratorValue_h 93