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#include "config.h" 27#include "CSSImageGeneratorValue.h" 28 29#include "CSSCanvasValue.h" 30#include "CSSCrossfadeValue.h" 31#include "CSSGradientValue.h" 32#include "Image.h" 33#include "RenderObject.h" 34#include <wtf/text/WTFString.h> 35 36namespace WebCore { 37 38static const double timeToKeepCachedGeneratedImagesInSeconds = 3; 39 40CSSImageGeneratorValue::CSSImageGeneratorValue(ClassType classType) 41 : CSSValue(classType) 42{ 43} 44 45CSSImageGeneratorValue::~CSSImageGeneratorValue() 46{ 47} 48 49void CSSImageGeneratorValue::addClient(RenderObject* renderer) 50{ 51 ASSERT(renderer); 52 ref(); 53 m_clients.add(renderer); 54} 55 56void CSSImageGeneratorValue::removeClient(RenderObject* renderer) 57{ 58 ASSERT(renderer); 59 m_clients.remove(renderer); 60 deref(); 61} 62 63GeneratorGeneratedImage* CSSImageGeneratorValue::cachedImageForSize(IntSize size) 64{ 65 if (size.isEmpty()) 66 return 0; 67 68 CachedGeneratedImage* cachedGeneratedImage = m_images.get(size); 69 if (!cachedGeneratedImage) 70 return 0; 71 72 cachedGeneratedImage->puntEvictionTimer(); 73 return cachedGeneratedImage->image(); 74} 75 76void CSSImageGeneratorValue::saveCachedImageForSize(IntSize size, PassRefPtr<GeneratorGeneratedImage> image) 77{ 78 ASSERT(!m_images.contains(size)); 79 m_images.add(size, adoptPtr(new CachedGeneratedImage(*this, size, image))); 80} 81 82void CSSImageGeneratorValue::evictCachedGeneratedImage(IntSize size) 83{ 84 ASSERT(m_images.contains(size)); 85 m_images.remove(size); 86} 87 88CSSImageGeneratorValue::CachedGeneratedImage::CachedGeneratedImage(CSSImageGeneratorValue& owner, IntSize size, PassRefPtr<GeneratorGeneratedImage> image) 89 : m_owner(owner) 90 , m_size(size) 91 , m_image(image) 92 , m_evictionTimer(this, &CSSImageGeneratorValue::CachedGeneratedImage::evictionTimerFired, timeToKeepCachedGeneratedImagesInSeconds) 93{ 94 m_evictionTimer.restart(); 95} 96 97void CSSImageGeneratorValue::CachedGeneratedImage::evictionTimerFired(DeferrableOneShotTimer<CachedGeneratedImage>*) 98{ 99 // NOTE: This is essentially a "delete this", the object is no longer valid after this line. 100 m_owner.evictCachedGeneratedImage(m_size); 101} 102 103PassRefPtr<Image> CSSImageGeneratorValue::image(RenderObject* renderer, const IntSize& size) 104{ 105 switch (classType()) { 106 case CanvasClass: 107 return static_cast<CSSCanvasValue*>(this)->image(renderer, size); 108 case CrossfadeClass: 109 return static_cast<CSSCrossfadeValue*>(this)->image(renderer, size); 110 case LinearGradientClass: 111 return static_cast<CSSLinearGradientValue*>(this)->image(renderer, size); 112 case RadialGradientClass: 113 return static_cast<CSSRadialGradientValue*>(this)->image(renderer, size); 114 default: 115 ASSERT_NOT_REACHED(); 116 } 117 return 0; 118} 119 120bool CSSImageGeneratorValue::isFixedSize() const 121{ 122 switch (classType()) { 123 case CanvasClass: 124 return static_cast<const CSSCanvasValue*>(this)->isFixedSize(); 125 case CrossfadeClass: 126 return static_cast<const CSSCrossfadeValue*>(this)->isFixedSize(); 127 case LinearGradientClass: 128 return static_cast<const CSSLinearGradientValue*>(this)->isFixedSize(); 129 case RadialGradientClass: 130 return static_cast<const CSSRadialGradientValue*>(this)->isFixedSize(); 131 default: 132 ASSERT_NOT_REACHED(); 133 } 134 return false; 135} 136 137IntSize CSSImageGeneratorValue::fixedSize(const RenderObject* renderer) 138{ 139 switch (classType()) { 140 case CanvasClass: 141 return static_cast<CSSCanvasValue*>(this)->fixedSize(renderer); 142 case CrossfadeClass: 143 return static_cast<CSSCrossfadeValue*>(this)->fixedSize(renderer); 144 case LinearGradientClass: 145 return static_cast<CSSLinearGradientValue*>(this)->fixedSize(renderer); 146 case RadialGradientClass: 147 return static_cast<CSSRadialGradientValue*>(this)->fixedSize(renderer); 148 default: 149 ASSERT_NOT_REACHED(); 150 } 151 return IntSize(); 152} 153 154bool CSSImageGeneratorValue::isPending() const 155{ 156 switch (classType()) { 157 case CrossfadeClass: 158 return static_cast<const CSSCrossfadeValue*>(this)->isPending(); 159 case CanvasClass: 160 return static_cast<const CSSCanvasValue*>(this)->isPending(); 161 case LinearGradientClass: 162 return static_cast<const CSSLinearGradientValue*>(this)->isPending(); 163 case RadialGradientClass: 164 return static_cast<const CSSRadialGradientValue*>(this)->isPending(); 165 default: 166 ASSERT_NOT_REACHED(); 167 } 168 return false; 169} 170 171bool CSSImageGeneratorValue::knownToBeOpaque(const RenderObject* renderer) const 172{ 173 switch (classType()) { 174 case CrossfadeClass: 175 return static_cast<const CSSCrossfadeValue*>(this)->knownToBeOpaque(renderer); 176 case CanvasClass: 177 return false; 178 case LinearGradientClass: 179 return static_cast<const CSSLinearGradientValue*>(this)->knownToBeOpaque(renderer); 180 case RadialGradientClass: 181 return static_cast<const CSSRadialGradientValue*>(this)->knownToBeOpaque(renderer); 182 default: 183 ASSERT_NOT_REACHED(); 184 } 185 return false; 186} 187 188void CSSImageGeneratorValue::loadSubimages(CachedResourceLoader* cachedResourceLoader) 189{ 190 switch (classType()) { 191 case CrossfadeClass: 192 static_cast<CSSCrossfadeValue*>(this)->loadSubimages(cachedResourceLoader); 193 break; 194 case CanvasClass: 195 static_cast<CSSCanvasValue*>(this)->loadSubimages(cachedResourceLoader); 196 break; 197 case LinearGradientClass: 198 static_cast<CSSLinearGradientValue*>(this)->loadSubimages(cachedResourceLoader); 199 break; 200 case RadialGradientClass: 201 static_cast<CSSRadialGradientValue*>(this)->loadSubimages(cachedResourceLoader); 202 break; 203 default: 204 ASSERT_NOT_REACHED(); 205 } 206} 207 208} // namespace WebCore 209