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| 1 /* | |
| 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) | |
| 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) | |
| 4 * (C) 2000 Dirk Mueller (mueller@kde.org) | |
| 5 * (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com) | |
| 6 * (C) 2006 Samuel Weinig (sam.weinig@gmail.com) | |
| 7 * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All r
ights reserved. | |
| 8 * Copyright (C) 2010 Google Inc. All rights reserved. | |
| 9 * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved. | |
| 10 * | |
| 11 * This library is free software; you can redistribute it and/or | |
| 12 * modify it under the terms of the GNU Library General Public | |
| 13 * License as published by the Free Software Foundation; either | |
| 14 * version 2 of the License, or (at your option) any later version. | |
| 15 * | |
| 16 * This library is distributed in the hope that it will be useful, | |
| 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 19 * Library General Public License for more details. | |
| 20 * | |
| 21 * You should have received a copy of the GNU Library General Public License | |
| 22 * along with this library; see the file COPYING.LIB. If not, write to | |
| 23 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 24 * Boston, MA 02110-1301, USA. | |
| 25 * | |
| 26 */ | |
| 27 | |
| 28 #include "config.h" | |
| 29 #include "core/rendering/RenderImage.h" | |
| 30 | |
| 31 #include "core/HTMLNames.h" | |
| 32 #include "core/editing/FrameSelection.h" | |
| 33 #include "core/fetch/ImageResource.h" | |
| 34 #include "core/fetch/ResourceLoadPriorityOptimizer.h" | |
| 35 #include "core/fetch/ResourceLoader.h" | |
| 36 #include "core/frame/LocalFrame.h" | |
| 37 #include "core/html/HTMLAreaElement.h" | |
| 38 #include "core/html/HTMLImageElement.h" | |
| 39 #include "core/html/HTMLInputElement.h" | |
| 40 #include "core/html/HTMLMapElement.h" | |
| 41 #include "core/layout/HitTestResult.h" | |
| 42 #include "core/layout/Layer.h" | |
| 43 #include "core/layout/PaintInfo.h" | |
| 44 #include "core/layout/TextRunConstructor.h" | |
| 45 #include "core/page/Page.h" | |
| 46 #include "core/paint/ImagePainter.h" | |
| 47 #include "core/rendering/RenderView.h" | |
| 48 #include "core/svg/graphics/SVGImage.h" | |
| 49 #include "platform/fonts/Font.h" | |
| 50 #include "platform/fonts/FontCache.h" | |
| 51 | |
| 52 namespace blink { | |
| 53 | |
| 54 using namespace HTMLNames; | |
| 55 | |
| 56 RenderImage::RenderImage(Element* element) | |
| 57 : RenderReplaced(element, LayoutSize()) | |
| 58 , m_didIncrementVisuallyNonEmptyPixelCount(false) | |
| 59 , m_isGeneratedContent(false) | |
| 60 , m_imageDevicePixelRatio(1.0f) | |
| 61 { | |
| 62 ResourceLoadPriorityOptimizer::resourceLoadPriorityOptimizer()->addLayoutObj
ect(this); | |
| 63 } | |
| 64 | |
| 65 RenderImage* RenderImage::createAnonymous(Document* document) | |
| 66 { | |
| 67 RenderImage* image = new RenderImage(0); | |
| 68 image->setDocumentForAnonymous(document); | |
| 69 return image; | |
| 70 } | |
| 71 | |
| 72 RenderImage::~RenderImage() | |
| 73 { | |
| 74 } | |
| 75 | |
| 76 void RenderImage::destroy() | |
| 77 { | |
| 78 ASSERT(m_imageResource); | |
| 79 m_imageResource->shutdown(); | |
| 80 RenderReplaced::destroy(); | |
| 81 } | |
| 82 | |
| 83 void RenderImage::setImageResource(PassOwnPtr<RenderImageResource> imageResource
) | |
| 84 { | |
| 85 ASSERT(!m_imageResource); | |
| 86 m_imageResource = imageResource; | |
| 87 m_imageResource->initialize(this); | |
| 88 } | |
| 89 | |
| 90 void RenderImage::imageChanged(WrappedImagePtr newImage, const IntRect* rect) | |
| 91 { | |
| 92 if (documentBeingDestroyed()) | |
| 93 return; | |
| 94 | |
| 95 if (hasBoxDecorationBackground() || hasMask() || hasShapeOutside()) | |
| 96 RenderReplaced::imageChanged(newImage, rect); | |
| 97 | |
| 98 if (!m_imageResource) | |
| 99 return; | |
| 100 | |
| 101 if (newImage != m_imageResource->imagePtr()) | |
| 102 return; | |
| 103 | |
| 104 // Per the spec, we let the server-sent header override srcset/other sources
of dpr. | |
| 105 // https://github.com/igrigorik/http-client-hints/blob/master/draft-grigorik
-http-client-hints-01.txt#L255 | |
| 106 if (m_imageResource->cachedImage() && m_imageResource->cachedImage()->hasDev
icePixelRatioHeaderValue()) | |
| 107 m_imageDevicePixelRatio = 1 / m_imageResource->cachedImage()->devicePixe
lRatioHeaderValue(); | |
| 108 | |
| 109 if (!m_didIncrementVisuallyNonEmptyPixelCount) { | |
| 110 // At a zoom level of 1 the image is guaranteed to have an integer size. | |
| 111 view()->frameView()->incrementVisuallyNonEmptyPixelCount(flooredIntSize(
m_imageResource->imageSize(1.0f))); | |
| 112 m_didIncrementVisuallyNonEmptyPixelCount = true; | |
| 113 } | |
| 114 | |
| 115 repaintOrMarkForLayout(rect); | |
| 116 } | |
| 117 | |
| 118 void RenderImage::updateIntrinsicSizeIfNeeded(const LayoutSize& newSize) | |
| 119 { | |
| 120 if (m_imageResource->errorOccurred() || !m_imageResource->hasImage()) | |
| 121 return; | |
| 122 setIntrinsicSize(newSize); | |
| 123 } | |
| 124 | |
| 125 void RenderImage::updateInnerContentRect() | |
| 126 { | |
| 127 // Propagate container size to the image resource. | |
| 128 LayoutRect containerRect = replacedContentRect(); | |
| 129 IntSize containerSize(containerRect.width(), containerRect.height()); | |
| 130 if (!containerSize.isEmpty()) | |
| 131 m_imageResource->setContainerSizeForRenderer(containerSize); | |
| 132 } | |
| 133 | |
| 134 void RenderImage::repaintOrMarkForLayout(const IntRect* rect) | |
| 135 { | |
| 136 LayoutSize oldIntrinsicSize = intrinsicSize(); | |
| 137 LayoutSize newIntrinsicSize = m_imageResource->intrinsicSize(style()->effect
iveZoom()); | |
| 138 updateIntrinsicSizeIfNeeded(newIntrinsicSize); | |
| 139 | |
| 140 // In the case of generated image content using :before/:after/content, we m
ight not be | |
| 141 // in the render tree yet. In that case, we just need to update our intrinsi
c size. | |
| 142 // layout() will be called after we are inserted in the tree which will take
care of | |
| 143 // what we are doing here. | |
| 144 if (!containingBlock()) | |
| 145 return; | |
| 146 | |
| 147 bool imageSourceHasChangedSize = oldIntrinsicSize != newIntrinsicSize; | |
| 148 if (imageSourceHasChangedSize) | |
| 149 setPreferredLogicalWidthsDirty(); | |
| 150 | |
| 151 // If the actual area occupied by the image has changed and it is not constr
ained by style then a layout is required. | |
| 152 bool imageSizeIsConstrained = style()->logicalWidth().isSpecified() && style
()->logicalHeight().isSpecified(); | |
| 153 | |
| 154 // FIXME: We only need to recompute the containing block's preferred size if
the containing block's size | |
| 155 // depends on the image's size (i.e., the container uses shrink-to-fit sizin
g). | |
| 156 // There's no easy way to detect that shrink-to-fit is needed, always force
a layout. | |
| 157 bool containingBlockNeedsToRecomputePreferredSize = style()->logicalWidth().
isPercent() || style()->logicalMaxWidth().isPercent() || style()->logicalMinWid
th().isPercent(); | |
| 158 | |
| 159 if (imageSourceHasChangedSize && (!imageSizeIsConstrained || containingBlock
NeedsToRecomputePreferredSize)) { | |
| 160 setNeedsLayoutAndFullPaintInvalidation(); | |
| 161 return; | |
| 162 } | |
| 163 | |
| 164 // The image hasn't changed in size or its style constrains its size, so a p
aint invalidation will suffice. | |
| 165 if (everHadLayout() && !selfNeedsLayout()) { | |
| 166 // The inner content rectangle is calculated during layout, but may need
an update now | |
| 167 // (unless the box has already been scheduled for layout). In order to c
alculate it, we | |
| 168 // may need values from the containing block, though, so make sure that
we're not too | |
| 169 // early. It may be that layout hasn't even taken place once yet. | |
| 170 updateInnerContentRect(); | |
| 171 } | |
| 172 | |
| 173 LayoutRect paintInvalidationRect; | |
| 174 if (rect) { | |
| 175 // The image changed rect is in source image coordinates (without zoom), | |
| 176 // so map from the bounds of the image to the contentsBox. | |
| 177 const FloatSize imageSizeWithoutZoom(m_imageResource->imageSize(1 / styl
e()->effectiveZoom())); | |
| 178 paintInvalidationRect = enclosingIntRect(mapRect(*rect, FloatRect(FloatP
oint(), imageSizeWithoutZoom), contentBoxRect())); | |
| 179 // Guard against too-large changed rects. | |
| 180 paintInvalidationRect.intersect(contentBoxRect()); | |
| 181 } else { | |
| 182 paintInvalidationRect = contentBoxRect(); | |
| 183 } | |
| 184 | |
| 185 { | |
| 186 DisableCompositingQueryAsserts disabler; | |
| 187 // FIXME: We should not allow paint invalidation out of paint invalidati
on state. crbug.com/457415 | |
| 188 DisablePaintInvalidationStateAsserts paintInvalidationAssertDisabler; | |
| 189 invalidatePaintRectangle(paintInvalidationRect); | |
| 190 } | |
| 191 | |
| 192 // Tell any potential compositing layers that the image needs updating. | |
| 193 contentChanged(ImageChanged); | |
| 194 } | |
| 195 | |
| 196 void RenderImage::notifyFinished(Resource* newImage) | |
| 197 { | |
| 198 if (!m_imageResource) | |
| 199 return; | |
| 200 | |
| 201 if (documentBeingDestroyed()) | |
| 202 return; | |
| 203 | |
| 204 invalidateBackgroundObscurationStatus(); | |
| 205 | |
| 206 if (newImage == m_imageResource->cachedImage()) { | |
| 207 // tell any potential compositing layers | |
| 208 // that the image is done and they can reference it directly. | |
| 209 contentChanged(ImageChanged); | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 void RenderImage::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& p
aintOffset) | |
| 214 { | |
| 215 ImagePainter(*this).paintReplaced(paintInfo, paintOffset); | |
| 216 } | |
| 217 | |
| 218 void RenderImage::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffs
et) | |
| 219 { | |
| 220 ImagePainter(*this).paint(paintInfo, paintOffset); | |
| 221 } | |
| 222 | |
| 223 void RenderImage::areaElementFocusChanged(HTMLAreaElement* areaElement) | |
| 224 { | |
| 225 ASSERT(areaElement->imageElement() == node()); | |
| 226 | |
| 227 Path path = areaElement->computePath(this); | |
| 228 if (path.isEmpty()) | |
| 229 return; | |
| 230 | |
| 231 const LayoutStyle* areaElementStyle = areaElement->computedStyle(); | |
| 232 unsigned short outlineWidth = areaElementStyle->outlineWidth(); | |
| 233 | |
| 234 IntRect paintInvalidationRect = enclosingIntRect(path.boundingRect()); | |
| 235 paintInvalidationRect.moveBy(-IntPoint(absoluteContentBoxOffset())); | |
| 236 paintInvalidationRect.inflate(outlineWidth); | |
| 237 | |
| 238 repaintOrMarkForLayout(&paintInvalidationRect); | |
| 239 } | |
| 240 | |
| 241 bool RenderImage::boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance
bleedAvoidance, InlineFlowBox*) const | |
| 242 { | |
| 243 if (!RenderBoxModelObject::boxShadowShouldBeAppliedToBackground(bleedAvoidan
ce)) | |
| 244 return false; | |
| 245 | |
| 246 return !const_cast<RenderImage*>(this)->boxDecorationBackgroundIsKnownToBeOb
scured(); | |
| 247 } | |
| 248 | |
| 249 bool RenderImage::foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect,
unsigned) const | |
| 250 { | |
| 251 if (!m_imageResource->hasImage() || m_imageResource->errorOccurred()) | |
| 252 return false; | |
| 253 if (m_imageResource->cachedImage() && !m_imageResource->cachedImage()->isLoa
ded()) | |
| 254 return false; | |
| 255 if (!contentBoxRect().contains(localRect)) | |
| 256 return false; | |
| 257 EFillBox backgroundClip = style()->backgroundClip(); | |
| 258 // Background paints under borders. | |
| 259 if (backgroundClip == BorderFillBox && style()->hasBorder() && !style()->bor
derObscuresBackground()) | |
| 260 return false; | |
| 261 // Background shows in padding area. | |
| 262 if ((backgroundClip == BorderFillBox || backgroundClip == PaddingFillBox) &&
style()->hasPadding()) | |
| 263 return false; | |
| 264 // Object-position may leave parts of the content box empty, regardless of t
he value of object-fit. | |
| 265 if (style()->objectPosition() != LayoutStyle::initialObjectPosition()) | |
| 266 return false; | |
| 267 // Object-fit may leave parts of the content box empty. | |
| 268 ObjectFit objectFit = style()->objectFit(); | |
| 269 if (objectFit != ObjectFitFill && objectFit != ObjectFitCover) | |
| 270 return false; | |
| 271 // Check for image with alpha. | |
| 272 return m_imageResource->cachedImage() && m_imageResource->cachedImage()->cur
rentFrameKnownToBeOpaque(this); | |
| 273 } | |
| 274 | |
| 275 bool RenderImage::computeBackgroundIsKnownToBeObscured() | |
| 276 { | |
| 277 if (!hasBackground()) | |
| 278 return false; | |
| 279 | |
| 280 LayoutRect paintedExtent; | |
| 281 if (!getBackgroundPaintedExtent(paintedExtent)) | |
| 282 return false; | |
| 283 return foregroundIsKnownToBeOpaqueInRect(paintedExtent, 0); | |
| 284 } | |
| 285 | |
| 286 LayoutUnit RenderImage::minimumReplacedHeight() const | |
| 287 { | |
| 288 return m_imageResource->errorOccurred() ? intrinsicSize().height() : LayoutU
nit(); | |
| 289 } | |
| 290 | |
| 291 HTMLMapElement* RenderImage::imageMap() const | |
| 292 { | |
| 293 HTMLImageElement* i = isHTMLImageElement(node()) ? toHTMLImageElement(node()
) : 0; | |
| 294 return i ? i->treeScope().getImageMap(i->fastGetAttribute(usemapAttr)) : 0; | |
| 295 } | |
| 296 | |
| 297 bool RenderImage::nodeAtPoint(const HitTestRequest& request, HitTestResult& resu
lt, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOf
fset, HitTestAction hitTestAction) | |
| 298 { | |
| 299 HitTestResult tempResult(result.hitTestLocation()); | |
| 300 bool inside = RenderReplaced::nodeAtPoint(request, tempResult, locationInCon
tainer, accumulatedOffset, hitTestAction); | |
| 301 | |
| 302 if (tempResult.innerNode() && node()) { | |
| 303 if (HTMLMapElement* map = imageMap()) { | |
| 304 LayoutRect contentBox = contentBoxRect(); | |
| 305 float scaleFactor = 1 / style()->effectiveZoom(); | |
| 306 LayoutPoint mapLocation = locationInContainer.point() - toLayoutSize
(accumulatedOffset) - locationOffset() - toLayoutSize(contentBox.location()); | |
| 307 mapLocation.scale(scaleFactor, scaleFactor); | |
| 308 | |
| 309 if (map->mapMouseEvent(mapLocation, contentBox.size(), tempResult)) | |
| 310 tempResult.setInnerNonSharedNode(node()); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 if (!inside && result.isRectBasedTest()) | |
| 315 result.append(tempResult); | |
| 316 if (inside) | |
| 317 result = tempResult; | |
| 318 return inside; | |
| 319 } | |
| 320 | |
| 321 void RenderImage::layout() | |
| 322 { | |
| 323 RenderReplaced::layout(); | |
| 324 updateInnerContentRect(); | |
| 325 } | |
| 326 | |
| 327 bool RenderImage::updateImageLoadingPriorities() | |
| 328 { | |
| 329 if (!m_imageResource || !m_imageResource->cachedImage() || m_imageResource->
cachedImage()->isLoaded()) | |
| 330 return false; | |
| 331 | |
| 332 LayoutRect viewBounds = viewRect(); | |
| 333 LayoutRect objectBounds = absoluteContentBox(); | |
| 334 | |
| 335 // The object bounds might be empty right now, so intersects will fail since
it doesn't deal | |
| 336 // with empty rects. Use LayoutRect::contains in that case. | |
| 337 bool isVisible; | |
| 338 if (!objectBounds.isEmpty()) | |
| 339 isVisible = viewBounds.intersects(objectBounds); | |
| 340 else | |
| 341 isVisible = viewBounds.contains(objectBounds); | |
| 342 | |
| 343 ResourceLoadPriorityOptimizer::VisibilityStatus status = isVisible ? | |
| 344 ResourceLoadPriorityOptimizer::Visible : ResourceLoadPriorityOptimizer::
NotVisible; | |
| 345 | |
| 346 LayoutRect screenArea; | |
| 347 if (!objectBounds.isEmpty()) { | |
| 348 screenArea = viewBounds; | |
| 349 screenArea.intersect(objectBounds); | |
| 350 } | |
| 351 | |
| 352 ResourceLoadPriorityOptimizer::resourceLoadPriorityOptimizer()->notifyImageR
esourceVisibility(m_imageResource->cachedImage(), status, screenArea); | |
| 353 | |
| 354 return true; | |
| 355 } | |
| 356 | |
| 357 void RenderImage::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, dou
ble& intrinsicRatio) const | |
| 358 { | |
| 359 RenderReplaced::computeIntrinsicRatioInformation(intrinsicSize, intrinsicRat
io); | |
| 360 | |
| 361 // Our intrinsicSize is empty if we're rendering generated images with relat
ive width/height. Figure out the right intrinsic size to use. | |
| 362 if (intrinsicSize.isEmpty() && (m_imageResource->imageHasRelativeWidth() ||
m_imageResource->imageHasRelativeHeight())) { | |
| 363 LayoutObject* containingBlock = isOutOfFlowPositioned() ? container() :
this->containingBlock(); | |
| 364 if (containingBlock->isBox()) { | |
| 365 RenderBox* box = toRenderBox(containingBlock); | |
| 366 intrinsicSize.setWidth(box->availableLogicalWidth().toFloat()); | |
| 367 intrinsicSize.setHeight(box->availableLogicalHeight(IncludeMarginBor
derPadding).toFloat()); | |
| 368 } | |
| 369 } | |
| 370 // Don't compute an intrinsic ratio to preserve historical WebKit behavior i
f we're painting alt text and/or a broken image. | |
| 371 // Video is excluded from this behavior because video elements have a defaul
t aspect ratio that a failed poster image load should not override. | |
| 372 if (m_imageResource && m_imageResource->errorOccurred() && !isVideo()) { | |
| 373 intrinsicRatio = 1; | |
| 374 return; | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 bool RenderImage::needsPreferredWidthsRecalculation() const | |
| 379 { | |
| 380 if (RenderReplaced::needsPreferredWidthsRecalculation()) | |
| 381 return true; | |
| 382 return embeddedContentBox(); | |
| 383 } | |
| 384 | |
| 385 RenderBox* RenderImage::embeddedContentBox() const | |
| 386 { | |
| 387 if (!m_imageResource) | |
| 388 return 0; | |
| 389 | |
| 390 ImageResource* cachedImage = m_imageResource->cachedImage(); | |
| 391 if (cachedImage && cachedImage->image() && cachedImage->image()->isSVGImage(
)) | |
| 392 return toSVGImage(cachedImage->image())->embeddedContentBox(); | |
| 393 | |
| 394 return 0; | |
| 395 } | |
| 396 | |
| 397 } // namespace blink | |
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Chromium Code Reviews
Issue 923953002:
Move rendering/RenderImage* to layout/LayoutImage* (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master