1 /* 2 * Copyright (C) 2008 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 "core/css/CSSValue.h" 30 #include "platform/geometry/IntSizeHash.h" 31 #include "wtf/HashCountedSet.h" 32 #include "wtf/RefPtr.h" 33 34 namespace WebCore { 35 36 class ResourceFetcher; 37 class Image; 38 class RenderObject; 39 class StyleResolver; 40 41 struct SizeAndCount { 42 SizeAndCount(IntSize newSize = IntSize(), int newCount = 0) sizeSizeAndCount43 : size(newSize) 44 , count(newCount) 45 { 46 } 47 48 IntSize size; 49 int count; 50 }; 51 52 typedef HashMap<const RenderObject*, SizeAndCount> RenderObjectSizeCountMap; 53 54 class CSSImageGeneratorValue : public CSSValue { 55 public: 56 ~CSSImageGeneratorValue(); 57 58 void addClient(RenderObject*, const IntSize&); 59 void removeClient(RenderObject*); 60 PassRefPtr<Image> image(RenderObject*, const IntSize&); 61 62 bool isFixedSize() const; 63 IntSize fixedSize(const RenderObject*); 64 65 bool isPending() const; 66 bool knownToBeOpaque(const RenderObject*) const; 67 68 void loadSubimages(ResourceFetcher*); 69 traceAfterDispatch(Visitor * visitor)70 void traceAfterDispatch(Visitor* visitor) { CSSValue::traceAfterDispatch(visitor); } 71 72 protected: 73 explicit CSSImageGeneratorValue(ClassType); 74 75 Image* getImage(RenderObject*, const IntSize&); 76 void putImage(const IntSize&, PassRefPtr<Image>); clients()77 const RenderObjectSizeCountMap& clients() const { return m_clients; } 78 79 HashCountedSet<IntSize> m_sizes; // A count of how many times a given image size is in use. 80 RenderObjectSizeCountMap m_clients; // A map from RenderObjects (with entry count) to image sizes. 81 HashMap<IntSize, RefPtr<Image> > m_images; // A cache of Image objects by image size. 82 83 #if ENABLE(OILPAN) 84 // FIXME: Oilpan: when/if we can make the renderer point directly to the CSSImageGenerator value using 85 // a member we don't need to have this hack where we keep a persistent to the instance as long as 86 // there are clients in the RenderObjectSizeCountMap. 87 GC_PLUGIN_IGNORE("366546") 88 OwnPtr<Persistent<CSSImageGeneratorValue> > m_keepAlive; 89 #endif 90 }; 91 92 DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageGeneratorValue, isImageGeneratorValue()); 93 94 } // namespace WebCore 95 96 #endif // CSSImageGeneratorValue_h 97