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| 1 /* | |
| 2 * Copyright (C) 2011 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 "sky/engine/core/css/CSSCrossfadeValue.h" | |
| 27 | |
| 28 #include "sky/engine/core/css/CSSImageValue.h" | |
| 29 #include "sky/engine/core/rendering/RenderObject.h" | |
| 30 #include "sky/engine/core/rendering/style/StyleFetchedImage.h" | |
| 31 #include "sky/engine/platform/graphics/CrossfadeGeneratedImage.h" | |
| 32 #include "sky/engine/wtf/text/StringBuilder.h" | |
| 33 | |
| 34 namespace blink { | |
| 35 | |
| 36 static bool subimageIsPending(CSSValue* value) | |
| 37 { | |
| 38 if (value->isImageValue()) | |
| 39 return toCSSImageValue(value)->cachedOrPendingImage()->isPendingImage(); | |
| 40 | |
| 41 if (value->isImageGeneratorValue()) | |
| 42 return toCSSImageGeneratorValue(value)->isPending(); | |
| 43 | |
| 44 ASSERT_NOT_REACHED(); | |
| 45 | |
| 46 return false; | |
| 47 } | |
| 48 | |
| 49 static bool subimageKnownToBeOpaque(CSSValue* value, const RenderObject* rendere
r) | |
| 50 { | |
| 51 if (value->isImageValue()) | |
| 52 return toCSSImageValue(value)->knownToBeOpaque(renderer); | |
| 53 | |
| 54 if (value->isImageGeneratorValue()) | |
| 55 return toCSSImageGeneratorValue(value)->knownToBeOpaque(renderer); | |
| 56 | |
| 57 ASSERT_NOT_REACHED(); | |
| 58 | |
| 59 return false; | |
| 60 } | |
| 61 | |
| 62 static ImageResource* cachedImageForCSSValue(CSSValue* value, ResourceFetcher* f
etcher) | |
| 63 { | |
| 64 if (!value) | |
| 65 return 0; | |
| 66 | |
| 67 if (value->isImageValue()) { | |
| 68 StyleFetchedImage* styleImageResource = toCSSImageValue(value)->cachedIm
age(fetcher); | |
| 69 if (!styleImageResource) | |
| 70 return 0; | |
| 71 | |
| 72 return styleImageResource->cachedImage(); | |
| 73 } | |
| 74 | |
| 75 if (value->isImageGeneratorValue()) { | |
| 76 toCSSImageGeneratorValue(value)->loadSubimages(fetcher); | |
| 77 // FIXME: Handle CSSImageGeneratorValue (and thus cross-fades with gradi
ents and canvas). | |
| 78 return 0; | |
| 79 } | |
| 80 | |
| 81 ASSERT_NOT_REACHED(); | |
| 82 | |
| 83 return 0; | |
| 84 } | |
| 85 | |
| 86 CSSCrossfadeValue::~CSSCrossfadeValue() | |
| 87 { | |
| 88 if (m_cachedFromImage) | |
| 89 m_cachedFromImage->removeClient(&m_crossfadeSubimageObserver); | |
| 90 if (m_cachedToImage) | |
| 91 m_cachedToImage->removeClient(&m_crossfadeSubimageObserver); | |
| 92 } | |
| 93 | |
| 94 String CSSCrossfadeValue::customCSSText() const | |
| 95 { | |
| 96 StringBuilder result; | |
| 97 result.appendLiteral("-webkit-cross-fade("); | |
| 98 result.append(m_fromValue->cssText()); | |
| 99 result.appendLiteral(", "); | |
| 100 result.append(m_toValue->cssText()); | |
| 101 result.appendLiteral(", "); | |
| 102 result.append(m_percentageValue->cssText()); | |
| 103 result.append(')'); | |
| 104 return result.toString(); | |
| 105 } | |
| 106 | |
| 107 IntSize CSSCrossfadeValue::fixedSize(const RenderObject* renderer) | |
| 108 { | |
| 109 float percentage = m_percentageValue->getFloatValue(); | |
| 110 float inversePercentage = 1 - percentage; | |
| 111 | |
| 112 ResourceFetcher* fetcher = renderer->document().fetcher(); | |
| 113 ImageResource* cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), f
etcher); | |
| 114 ImageResource* cachedToImage = cachedImageForCSSValue(m_toValue.get(), fetch
er); | |
| 115 | |
| 116 if (!cachedFromImage || !cachedToImage) | |
| 117 return IntSize(); | |
| 118 | |
| 119 IntSize fromImageSize = cachedFromImage->imageForRenderer(renderer)->size(); | |
| 120 IntSize toImageSize = cachedToImage->imageForRenderer(renderer)->size(); | |
| 121 | |
| 122 // Rounding issues can cause transitions between images of equal size to ret
urn | |
| 123 // a different fixed size; avoid performing the interpolation if the images
are the same size. | |
| 124 if (fromImageSize == toImageSize) | |
| 125 return fromImageSize; | |
| 126 | |
| 127 return IntSize(fromImageSize.width() * inversePercentage + toImageSize.width
() * percentage, | |
| 128 fromImageSize.height() * inversePercentage + toImageSize.height() * perc
entage); | |
| 129 } | |
| 130 | |
| 131 bool CSSCrossfadeValue::isPending() const | |
| 132 { | |
| 133 return subimageIsPending(m_fromValue.get()) || subimageIsPending(m_toValue.g
et()); | |
| 134 } | |
| 135 | |
| 136 bool CSSCrossfadeValue::knownToBeOpaque(const RenderObject* renderer) const | |
| 137 { | |
| 138 return subimageKnownToBeOpaque(m_fromValue.get(), renderer) && subimageKnown
ToBeOpaque(m_toValue.get(), renderer); | |
| 139 } | |
| 140 | |
| 141 void CSSCrossfadeValue::loadSubimages(ResourceFetcher* fetcher) | |
| 142 { | |
| 143 ResourcePtr<ImageResource> oldCachedFromImage = m_cachedFromImage; | |
| 144 ResourcePtr<ImageResource> oldCachedToImage = m_cachedToImage; | |
| 145 | |
| 146 m_cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), fetcher); | |
| 147 m_cachedToImage = cachedImageForCSSValue(m_toValue.get(), fetcher); | |
| 148 | |
| 149 if (m_cachedFromImage != oldCachedFromImage) { | |
| 150 if (oldCachedFromImage) | |
| 151 oldCachedFromImage->removeClient(&m_crossfadeSubimageObserver); | |
| 152 if (m_cachedFromImage) | |
| 153 m_cachedFromImage->addClient(&m_crossfadeSubimageObserver); | |
| 154 } | |
| 155 | |
| 156 if (m_cachedToImage != oldCachedToImage) { | |
| 157 if (oldCachedToImage) | |
| 158 oldCachedToImage->removeClient(&m_crossfadeSubimageObserver); | |
| 159 if (m_cachedToImage) | |
| 160 m_cachedToImage->addClient(&m_crossfadeSubimageObserver); | |
| 161 } | |
| 162 | |
| 163 m_crossfadeSubimageObserver.setReady(true); | |
| 164 } | |
| 165 | |
| 166 PassRefPtr<Image> CSSCrossfadeValue::image(RenderObject* renderer, const IntSize
& size) | |
| 167 { | |
| 168 if (size.isEmpty()) | |
| 169 return nullptr; | |
| 170 | |
| 171 ResourceFetcher* fetcher = renderer->document().fetcher(); | |
| 172 ImageResource* cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), f
etcher); | |
| 173 ImageResource* cachedToImage = cachedImageForCSSValue(m_toValue.get(), fetch
er); | |
| 174 | |
| 175 if (!cachedFromImage || !cachedToImage) | |
| 176 return Image::nullImage(); | |
| 177 | |
| 178 Image* fromImage = cachedFromImage->imageForRenderer(renderer); | |
| 179 Image* toImage = cachedToImage->imageForRenderer(renderer); | |
| 180 | |
| 181 if (!fromImage || !toImage) | |
| 182 return Image::nullImage(); | |
| 183 | |
| 184 m_generatedImage = CrossfadeGeneratedImage::create(fromImage, toImage, m_per
centageValue->getFloatValue(), fixedSize(renderer), size); | |
| 185 | |
| 186 return m_generatedImage.release(); | |
| 187 } | |
| 188 | |
| 189 void CSSCrossfadeValue::crossfadeChanged(const IntRect&) | |
| 190 { | |
| 191 RenderObjectSizeCountMap::const_iterator end = clients().end(); | |
| 192 for (RenderObjectSizeCountMap::const_iterator curr = clients().begin(); curr
!= end; ++curr) { | |
| 193 RenderObject* client = const_cast<RenderObject*>(curr->key); | |
| 194 client->imageChanged(static_cast<WrappedImagePtr>(this)); | |
| 195 } | |
| 196 } | |
| 197 | |
| 198 void CSSCrossfadeValue::CrossfadeSubimageObserverProxy::imageChanged(ImageResour
ce*, const IntRect* rect) | |
| 199 { | |
| 200 if (m_ready) | |
| 201 m_ownerValue->crossfadeChanged(*rect); | |
| 202 } | |
| 203 | |
| 204 bool CSSCrossfadeValue::equals(const CSSCrossfadeValue& other) const | |
| 205 { | |
| 206 return compareCSSValuePtr(m_fromValue, other.m_fromValue) | |
| 207 && compareCSSValuePtr(m_toValue, other.m_toValue) | |
| 208 && compareCSSValuePtr(m_percentageValue, other.m_percentageValue); | |
| 209 } | |
| 210 | |
| 211 } // namespace blink | |
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Chromium Code Reviews
Issue 1214633005:
Remove CSS clients of ImageResource (Closed)
Base URL: git@github.com:domokit/mojo.git@master