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| 1 /* | |
| 2 * Copyright (C) 2013 Google 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 are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "sky/engine/config.h" | |
| 32 #include "sky/engine/core/rendering/ImageQualityController.h" | |
| 33 | |
| 34 #include "sky/engine/core/frame/FrameView.h" | |
| 35 #include "sky/engine/core/frame/LocalFrame.h" | |
| 36 #include "sky/engine/platform/graphics/GraphicsContext.h" | |
| 37 | |
| 38 namespace blink { | |
| 39 | |
| 40 static const double cLowQualityTimeThreshold = 0.500; // 500 ms | |
| 41 | |
| 42 static ImageQualityController* gImageQualityController = 0; | |
| 43 | |
| 44 ImageQualityController* ImageQualityController::imageQualityController() | |
| 45 { | |
| 46 if (!gImageQualityController) | |
| 47 gImageQualityController = new ImageQualityController; | |
| 48 | |
| 49 return gImageQualityController; | |
| 50 } | |
| 51 | |
| 52 void ImageQualityController::remove(RenderObject* renderer) | |
| 53 { | |
| 54 if (gImageQualityController) { | |
| 55 gImageQualityController->objectDestroyed(renderer); | |
| 56 if (gImageQualityController->isEmpty()) { | |
| 57 delete gImageQualityController; | |
| 58 gImageQualityController = 0; | |
| 59 } | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 bool ImageQualityController::has(RenderObject* renderer) | |
| 64 { | |
| 65 return gImageQualityController && gImageQualityController->m_objectLayerSize
Map.contains(renderer); | |
| 66 } | |
| 67 | |
| 68 InterpolationQuality ImageQualityController::chooseInterpolationQuality(Graphics
Context* context, RenderObject* object, Image* image, const void* layer, const L
ayoutSize& layoutSize) | |
| 69 { | |
| 70 if (object->style()->imageRendering() == ImageRenderingPixelated | |
| 71 && image | |
| 72 && (layoutSize.width() > image->width() || layoutSize.height() > image->
height() || layoutSize == image->size())) { | |
| 73 return InterpolationNone; | |
| 74 } | |
| 75 | |
| 76 if (InterpolationDefault == InterpolationLow) | |
| 77 return InterpolationLow; | |
| 78 | |
| 79 if (shouldPaintAtLowQuality(context, object, image, layer, layoutSize)) | |
| 80 return InterpolationLow; | |
| 81 | |
| 82 // For images that are potentially animated we paint them at medium quality. | |
| 83 if (image && image->maybeAnimated()) | |
| 84 return InterpolationMedium; | |
| 85 | |
| 86 return InterpolationDefault; | |
| 87 } | |
| 88 | |
| 89 ImageQualityController::~ImageQualityController() | |
| 90 { | |
| 91 // This will catch users of ImageQualityController that forget to call clean
Up. | |
| 92 ASSERT(!gImageQualityController || gImageQualityController->isEmpty()); | |
| 93 } | |
| 94 | |
| 95 // FIXME(sky): m_liveResizeOptimizationIsActive is never set to true. | |
| 96 ImageQualityController::ImageQualityController() | |
| 97 : m_timer(this, &ImageQualityController::highQualityRepaintTimerFired) | |
| 98 , m_animatedResizeIsActive(false) | |
| 99 , m_liveResizeOptimizationIsActive(false) | |
| 100 { | |
| 101 } | |
| 102 | |
| 103 void ImageQualityController::removeLayer(RenderObject* object, LayerSizeMap* inn
erMap, const void* layer) | |
| 104 { | |
| 105 if (innerMap) { | |
| 106 innerMap->remove(layer); | |
| 107 if (innerMap->isEmpty()) | |
| 108 objectDestroyed(object); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 void ImageQualityController::set(RenderObject* object, LayerSizeMap* innerMap, c
onst void* layer, const LayoutSize& size) | |
| 113 { | |
| 114 if (innerMap) | |
| 115 innerMap->set(layer, size); | |
| 116 else { | |
| 117 LayerSizeMap newInnerMap; | |
| 118 newInnerMap.set(layer, size); | |
| 119 m_objectLayerSizeMap.set(object, newInnerMap); | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 void ImageQualityController::objectDestroyed(RenderObject* object) | |
| 124 { | |
| 125 m_objectLayerSizeMap.remove(object); | |
| 126 if (m_objectLayerSizeMap.isEmpty()) { | |
| 127 m_animatedResizeIsActive = false; | |
| 128 m_timer.stop(); | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 void ImageQualityController::highQualityRepaintTimerFired(Timer<ImageQualityCont
roller>*) | |
| 133 { | |
| 134 if (!m_animatedResizeIsActive && !m_liveResizeOptimizationIsActive) | |
| 135 return; | |
| 136 m_animatedResizeIsActive = false; | |
| 137 | |
| 138 for (ObjectLayerSizeMap::iterator it = m_objectLayerSizeMap.begin(); it != m
_objectLayerSizeMap.end(); ++it) { | |
| 139 it->key->scheduleVisualUpdate(); | |
| 140 } | |
| 141 | |
| 142 m_liveResizeOptimizationIsActive = false; | |
| 143 } | |
| 144 | |
| 145 void ImageQualityController::restartTimer() | |
| 146 { | |
| 147 m_timer.startOneShot(cLowQualityTimeThreshold, FROM_HERE); | |
| 148 } | |
| 149 | |
| 150 bool ImageQualityController::shouldPaintAtLowQuality(GraphicsContext* context, R
enderObject* object, Image* image, const void *layer, const LayoutSize& layoutSi
ze) | |
| 151 { | |
| 152 // If the image is not a bitmap image, then none of this is relevant and we
just paint at high | |
| 153 // quality. | |
| 154 if (!image || !image->isBitmapImage()) | |
| 155 return false; | |
| 156 | |
| 157 if (object->style()->imageRendering() == ImageRenderingOptimizeContrast) | |
| 158 return true; | |
| 159 | |
| 160 // Look ourselves up in the hashtables. | |
| 161 ObjectLayerSizeMap::iterator i = m_objectLayerSizeMap.find(object); | |
| 162 LayerSizeMap* innerMap = i != m_objectLayerSizeMap.end() ? &i->value : 0; | |
| 163 LayoutSize oldSize; | |
| 164 bool isFirstResize = true; | |
| 165 if (innerMap) { | |
| 166 LayerSizeMap::iterator j = innerMap->find(layer); | |
| 167 if (j != innerMap->end()) { | |
| 168 isFirstResize = false; | |
| 169 oldSize = j->value; | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 const AffineTransform& currentTransform = context->getCTM(); | |
| 174 bool contextIsScaled = !currentTransform.isIdentityOrTranslationOrFlipped(); | |
| 175 | |
| 176 LayoutSize scaledImageSize = currentTransform.mapSize(image->size()); | |
| 177 LayoutSize scaledLayoutSize = currentTransform.mapSize(roundedIntSize(layout
Size)); | |
| 178 | |
| 179 // If the containing FrameView is being resized, paint at low quality until
resizing is finished. | |
| 180 if (m_liveResizeOptimizationIsActive) { | |
| 181 // Live resize has ended, paint in HQ and remove this object from the li
st. | |
| 182 removeLayer(object, innerMap, layer); | |
| 183 return false; | |
| 184 } | |
| 185 | |
| 186 // See crbug.com/382491. This test is insufficient to ensure that there is n
o scale | |
| 187 // applied in the compositor, but it is probably adequate here. In the worst
case we | |
| 188 // draw at high quality when we need not. | |
| 189 if (!contextIsScaled && scaledLayoutSize == scaledImageSize) { | |
| 190 // There is no scale in effect. If we had a scale in effect before, we c
an just remove this object from the list. | |
| 191 removeLayer(object, innerMap, layer); | |
| 192 return false; | |
| 193 } | |
| 194 | |
| 195 // If an animated resize is active, paint in low quality and kick the timer
ahead. | |
| 196 if (m_animatedResizeIsActive) { | |
| 197 set(object, innerMap, layer, scaledLayoutSize); | |
| 198 restartTimer(); | |
| 199 return true; | |
| 200 } | |
| 201 // If this is the first time resizing this image, or its size is the | |
| 202 // same as the last resize, draw at high res, but record the paint | |
| 203 // size and set the timer. | |
| 204 if (isFirstResize || oldSize == scaledLayoutSize) { | |
| 205 restartTimer(); | |
| 206 set(object, innerMap, layer, scaledLayoutSize); | |
| 207 return false; | |
| 208 } | |
| 209 // If the timer is no longer active, draw at high quality and don't | |
| 210 // set the timer. | |
| 211 if (!m_timer.isActive()) { | |
| 212 removeLayer(object, innerMap, layer); | |
| 213 return false; | |
| 214 } | |
| 215 // This object has been resized to two different sizes while the timer | |
| 216 // is active, so draw at low quality, set the flag for animated resizes and | |
| 217 // the object to the list for high quality redraw. | |
| 218 set(object, innerMap, layer, scaledLayoutSize); | |
| 219 m_animatedResizeIsActive = true; | |
| 220 restartTimer(); | |
| 221 return true; | |
| 222 } | |
| 223 | |
| 224 } // namespace blink | |
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Chromium Code Reviews
Issue 860843006:
Delete blink::ImageQualityController (Closed)
Base URL: git@github.com:domokit/mojo.git@master