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 "CSSValue.h" 30 #include "IntSizeHash.h" 31 #include <wtf/HashMap.h> 32 #include <wtf/HashCountedSet.h> 33 #include <wtf/RefPtr.h> 34 35 namespace WebCore { 36 37 class Image; 38 class StyleGeneratedImage; 39 class RenderObject; 40 41 class CSSImageGeneratorValue : public CSSValue { 42 public: 43 virtual ~CSSImageGeneratorValue(); 44 45 void addClient(RenderObject*, const IntSize&); 46 void removeClient(RenderObject*); 47 virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) = 0; 48 49 StyleGeneratedImage* generatedImage(); 50 51 virtual bool isFixedSize() const { return false; } 52 virtual IntSize fixedSize(const RenderObject*) { return IntSize(); } 53 54 protected: 55 CSSImageGeneratorValue(); 56 57 Image* getImage(RenderObject*, const IntSize&); 58 void putImage(const IntSize&, PassRefPtr<Image>); 59 60 typedef pair<IntSize, int> SizeCountPair; 61 typedef HashMap<RenderObject*, SizeCountPair> RenderObjectSizeCountMap; 62 63 HashCountedSet<IntSize> m_sizes; // A count of how many times a given image size is in use. 64 RenderObjectSizeCountMap m_clients; // A map from RenderObjects (with entry count) to image sizes. 65 HashMap<IntSize, RefPtr<Image> > m_images; // A cache of Image objects by image size. 66 67 RefPtr<StyleGeneratedImage> m_image; 68 bool m_accessedImage; 69 70 private: 71 virtual bool isImageGeneratorValue() const { return true; } 72 }; 73 74 } // namespace WebCore 75 76 #endif // CSSImageGeneratorValue_h 77
