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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  *           (C) 2006 Allan Sandfeld Jensen (kde (at) carewolf.com)
      6  *           (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com)
      7  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
      8  * Copyright (C) 2010 Google Inc. All rights reserved.
      9  *
     10  * This library is free software; you can redistribute it and/or
     11  * modify it under the terms of the GNU Library General Public
     12  * License as published by the Free Software Foundation; either
     13  * version 2 of the License, or (at your option) any later version.
     14  *
     15  * This library is distributed in the hope that it will be useful,
     16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     18  * Library General Public License for more details.
     19  *
     20  * You should have received a copy of the GNU Library General Public License
     21  * along with this library; see the file COPYING.LIB.  If not, write to
     22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     23  * Boston, MA 02110-1301, USA.
     24  *
     25  */
     26 
     27 #include "config.h"
     28 #include "RenderImage.h"
     29 
     30 #include "Frame.h"
     31 #include "GraphicsContext.h"
     32 #include "HTMLAreaElement.h"
     33 #include "HTMLImageElement.h"
     34 #include "HTMLInputElement.h"
     35 #include "HTMLMapElement.h"
     36 #include "HTMLNames.h"
     37 #include "HitTestResult.h"
     38 #include "Page.h"
     39 #include "RenderLayer.h"
     40 #include "RenderView.h"
     41 #include "SelectionController.h"
     42 #include "TextRun.h"
     43 #include <wtf/UnusedParam.h>
     44 
     45 #ifdef ANDROID_LAYOUT
     46 #include "Settings.h"
     47 #endif
     48 
     49 #if ENABLE(WML)
     50 #include "WMLImageElement.h"
     51 #include "WMLNames.h"
     52 #endif
     53 
     54 using namespace std;
     55 
     56 namespace WebCore {
     57 
     58 using namespace HTMLNames;
     59 
     60 RenderImage::RenderImage(Node* node)
     61     : RenderReplaced(node, IntSize(0, 0))
     62     , m_needsToSetSizeForAltText(false)
     63 {
     64     updateAltText();
     65 
     66     view()->frameView()->setIsVisuallyNonEmpty();
     67 }
     68 
     69 RenderImage::~RenderImage()
     70 {
     71     ASSERT(m_imageResource);
     72     m_imageResource->shutdown();
     73 }
     74 
     75 void RenderImage::setImageResource(PassOwnPtr<RenderImageResource> imageResource)
     76 {
     77     ASSERT(!m_imageResource);
     78     m_imageResource = imageResource;
     79     m_imageResource->initialize(this);
     80 }
     81 
     82 // If we'll be displaying either alt text or an image, add some padding.
     83 static const unsigned short paddingWidth = 4;
     84 static const unsigned short paddingHeight = 4;
     85 
     86 // Alt text is restricted to this maximum size, in pixels.  These are
     87 // signed integers because they are compared with other signed values.
     88 static const float maxAltTextWidth = 1024;
     89 static const int maxAltTextHeight = 256;
     90 
     91 IntSize RenderImage::imageSizeForError(CachedImage* newImage) const
     92 {
     93     ASSERT_ARG(newImage, newImage);
     94     ASSERT_ARG(newImage, newImage->image());
     95 
     96     // imageSize() returns 0 for the error image. We need the true size of the
     97     // error image, so we have to get it by grabbing image() directly.
     98     return IntSize(paddingWidth + newImage->image()->width() * style()->effectiveZoom(), paddingHeight + newImage->image()->height() * style()->effectiveZoom());
     99 }
    100 
    101 // Sets the image height and width to fit the alt text.  Returns true if the
    102 // image size changed.
    103 bool RenderImage::setImageSizeForAltText(CachedImage* newImage /* = 0 */)
    104 {
    105     IntSize imageSize;
    106     if (newImage && newImage->image())
    107         imageSize = imageSizeForError(newImage);
    108     else if (!m_altText.isEmpty() || newImage) {
    109         // If we'll be displaying either text or an image, add a little padding.
    110         imageSize = IntSize(paddingWidth, paddingHeight);
    111     }
    112 
    113     // we have an alt and the user meant it (its not a text we invented)
    114     if (!m_altText.isEmpty()) {
    115         const Font& font = style()->font();
    116         IntSize textSize(min(font.width(TextRun(m_altText.characters(), m_altText.length())), maxAltTextWidth), min(font.fontMetrics().height(), maxAltTextHeight));
    117         imageSize = imageSize.expandedTo(textSize);
    118     }
    119 
    120     if (imageSize == intrinsicSize())
    121         return false;
    122 
    123     setIntrinsicSize(imageSize);
    124     return true;
    125 }
    126 
    127 void RenderImage::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
    128 {
    129     RenderReplaced::styleDidChange(diff, oldStyle);
    130     if (m_needsToSetSizeForAltText) {
    131         if (!m_altText.isEmpty() && setImageSizeForAltText(m_imageResource->cachedImage()))
    132             imageDimensionsChanged(true /* imageSizeChanged */);
    133         m_needsToSetSizeForAltText = false;
    134     }
    135 }
    136 
    137 void RenderImage::imageChanged(WrappedImagePtr newImage, const IntRect* rect)
    138 {
    139     if (documentBeingDestroyed())
    140         return;
    141 
    142     if (hasBoxDecorations() || hasMask())
    143         RenderReplaced::imageChanged(newImage, rect);
    144 
    145     if (!m_imageResource)
    146         return;
    147 
    148     if (newImage != m_imageResource->imagePtr() || !newImage)
    149         return;
    150 
    151     bool imageSizeChanged = false;
    152 
    153     // Set image dimensions, taking into account the size of the alt text.
    154     if (m_imageResource->errorOccurred()) {
    155         if (!m_altText.isEmpty() && document()->isPendingStyleRecalc()) {
    156             ASSERT(node());
    157             if (node()) {
    158                 m_needsToSetSizeForAltText = true;
    159                 node()->setNeedsStyleRecalc(SyntheticStyleChange);
    160             }
    161             return;
    162         }
    163         imageSizeChanged = setImageSizeForAltText(m_imageResource->cachedImage());
    164     }
    165 
    166     imageDimensionsChanged(imageSizeChanged, rect);
    167 }
    168 
    169 void RenderImage::imageDimensionsChanged(bool imageSizeChanged, const IntRect* rect)
    170 {
    171     bool shouldRepaint = true;
    172 
    173     if (m_imageResource->imageSize(style()->effectiveZoom()) != intrinsicSize() || imageSizeChanged) {
    174         if (!m_imageResource->errorOccurred())
    175             setIntrinsicSize(m_imageResource->imageSize(style()->effectiveZoom()));
    176 
    177         // In the case of generated image content using :before/:after, we might not be in the
    178         // render tree yet.  In that case, we don't need to worry about check for layout, since we'll get a
    179         // layout when we get added in to the render tree hierarchy later.
    180         if (containingBlock()) {
    181             // lets see if we need to relayout at all..
    182             int oldwidth = width();
    183             int oldheight = height();
    184             if (!preferredLogicalWidthsDirty())
    185                 setPreferredLogicalWidthsDirty(true);
    186             computeLogicalWidth();
    187             computeLogicalHeight();
    188 
    189             if (imageSizeChanged || width() != oldwidth || height() != oldheight) {
    190                 shouldRepaint = false;
    191                 if (!selfNeedsLayout())
    192                     setNeedsLayout(true);
    193             }
    194 
    195             setWidth(oldwidth);
    196             setHeight(oldheight);
    197         }
    198     }
    199 
    200     if (shouldRepaint) {
    201         IntRect repaintRect;
    202         if (rect) {
    203             // The image changed rect is in source image coordinates (pre-zooming),
    204             // so map from the bounds of the image to the contentsBox.
    205             repaintRect = enclosingIntRect(mapRect(*rect, FloatRect(FloatPoint(), m_imageResource->imageSize(1.0f)), contentBoxRect()));
    206             // Guard against too-large changed rects.
    207             repaintRect.intersect(contentBoxRect());
    208         } else
    209             repaintRect = contentBoxRect();
    210 
    211         repaintRectangle(repaintRect);
    212 
    213 #if USE(ACCELERATED_COMPOSITING)
    214         if (hasLayer()) {
    215             // Tell any potential compositing layers that the image needs updating.
    216             layer()->contentChanged(RenderLayer::ImageChanged);
    217         }
    218 #endif
    219     }
    220 }
    221 
    222 void RenderImage::notifyFinished(CachedResource* newImage)
    223 {
    224     if (!m_imageResource)
    225         return;
    226 
    227     if (documentBeingDestroyed())
    228         return;
    229 
    230 #if USE(ACCELERATED_COMPOSITING)
    231     if (newImage == m_imageResource->cachedImage() && hasLayer()) {
    232         // tell any potential compositing layers
    233         // that the image is done and they can reference it directly.
    234         layer()->contentChanged(RenderLayer::ImageChanged);
    235     }
    236 #else
    237     UNUSED_PARAM(newImage);
    238 #endif
    239 }
    240 
    241 void RenderImage::paintReplaced(PaintInfo& paintInfo, int tx, int ty)
    242 {
    243     int cWidth = contentWidth();
    244     int cHeight = contentHeight();
    245     int leftBorder = borderLeft();
    246     int topBorder = borderTop();
    247     int leftPad = paddingLeft();
    248     int topPad = paddingTop();
    249 
    250     GraphicsContext* context = paintInfo.context;
    251 
    252     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred()) {
    253         if (paintInfo.phase == PaintPhaseSelection)
    254             return;
    255 
    256         if (cWidth > 2 && cHeight > 2) {
    257             // Draw an outline rect where the image should be.
    258 #ifdef ANDROID_FIX // see http://b/issue?id=2052757
    259             context->save();
    260 #endif
    261             context->setStrokeStyle(SolidStroke);
    262             context->setStrokeColor(Color::lightGray, style()->colorSpace());
    263             context->setFillColor(Color::transparent, style()->colorSpace());
    264             context->drawRect(IntRect(tx + leftBorder + leftPad, ty + topBorder + topPad, cWidth, cHeight));
    265 #ifdef ANDROID_FIX // see http://b/issue?id=2052757
    266             context->restore();
    267 #endif
    268 
    269             bool errorPictureDrawn = false;
    270             int imageX = 0;
    271             int imageY = 0;
    272             // When calculating the usable dimensions, exclude the pixels of
    273             // the ouline rect so the error image/alt text doesn't draw on it.
    274             int usableWidth = cWidth - 2;
    275             int usableHeight = cHeight - 2;
    276 
    277             RefPtr<Image> image = m_imageResource->image();
    278 
    279             if (m_imageResource->errorOccurred() && !image->isNull() && usableWidth >= image->width() && usableHeight >= image->height()) {
    280                 // Center the error image, accounting for border and padding.
    281                 int centerX = (usableWidth - image->width()) / 2;
    282                 if (centerX < 0)
    283                     centerX = 0;
    284                 int centerY = (usableHeight - image->height()) / 2;
    285                 if (centerY < 0)
    286                     centerY = 0;
    287                 imageX = leftBorder + leftPad + centerX + 1;
    288                 imageY = topBorder + topPad + centerY + 1;
    289                 context->drawImage(image.get(), style()->colorSpace(), IntPoint(tx + imageX, ty + imageY));
    290                 errorPictureDrawn = true;
    291             }
    292 
    293             if (!m_altText.isEmpty()) {
    294                 String text = document()->displayStringModifiedByEncoding(m_altText);
    295                 context->setFillColor(style()->visitedDependentColor(CSSPropertyColor), style()->colorSpace());
    296                 int ax = tx + leftBorder + leftPad;
    297                 int ay = ty + topBorder + topPad;
    298                 const Font& font = style()->font();
    299                 const FontMetrics& fontMetrics = font.fontMetrics();
    300                 int ascent = fontMetrics.ascent();
    301 
    302                 // Only draw the alt text if it'll fit within the content box,
    303                 // and only if it fits above the error image.
    304                 TextRun textRun(text.characters(), text.length());
    305                 int textWidth = font.width(textRun);
    306                 if (errorPictureDrawn) {
    307                     if (usableWidth >= textWidth && fontMetrics.height() <= imageY)
    308                         context->drawText(font, textRun, IntPoint(ax, ay + ascent));
    309                 } else if (usableWidth >= textWidth && cHeight >= fontMetrics.height())
    310                     context->drawText(font, textRun, IntPoint(ax, ay + ascent));
    311             }
    312         }
    313     } else if (m_imageResource->hasImage() && cWidth > 0 && cHeight > 0) {
    314         RefPtr<Image> img = m_imageResource->image(cWidth, cHeight);
    315         if (!img || img->isNull())
    316             return;
    317 
    318 #if PLATFORM(MAC)
    319         if (style()->highlight() != nullAtom && !paintInfo.context->paintingDisabled())
    320             paintCustomHighlight(tx - x(), ty - y(), style()->highlight(), true);
    321 #endif
    322 
    323         IntSize contentSize(cWidth, cHeight);
    324         IntRect rect(IntPoint(tx + leftBorder + leftPad, ty + topBorder + topPad), contentSize);
    325         paintIntoRect(context, rect);
    326     }
    327 }
    328 
    329 void RenderImage::paint(PaintInfo& paintInfo, int tx, int ty)
    330 {
    331     RenderReplaced::paint(paintInfo, tx, ty);
    332 
    333     if (paintInfo.phase == PaintPhaseOutline)
    334         paintAreaElementFocusRing(paintInfo);
    335 }
    336 
    337 void RenderImage::paintAreaElementFocusRing(PaintInfo& paintInfo)
    338 {
    339     Document* document = this->document();
    340 
    341     if (document->printing() || !document->frame()->selection()->isFocusedAndActive())
    342         return;
    343 
    344     if (paintInfo.context->paintingDisabled() && !paintInfo.context->updatingControlTints())
    345         return;
    346 
    347     Node* focusedNode = document->focusedNode();
    348     if (!focusedNode || !focusedNode->hasTagName(areaTag))
    349         return;
    350 
    351     HTMLAreaElement* areaElement = static_cast<HTMLAreaElement*>(focusedNode);
    352     if (areaElement->imageElement() != node())
    353         return;
    354 
    355     // Even if the theme handles focus ring drawing for entire elements, it won't do it for
    356     // an area within an image, so we don't call RenderTheme::supportsFocusRing here.
    357 
    358     Path path = areaElement->computePath(this);
    359     if (path.isEmpty())
    360         return;
    361 
    362     // FIXME: Do we need additional code to clip the path to the image's bounding box?
    363 
    364     RenderStyle* areaElementStyle = areaElement->computedStyle();
    365     unsigned short outlineWidth = areaElementStyle->outlineWidth();
    366     if (!outlineWidth)
    367         return;
    368 
    369     paintInfo.context->drawFocusRing(path, outlineWidth,
    370         areaElementStyle->outlineOffset(),
    371         areaElementStyle->visitedDependentColor(CSSPropertyOutlineColor));
    372 }
    373 
    374 void RenderImage::areaElementFocusChanged(HTMLAreaElement* element)
    375 {
    376     ASSERT_UNUSED(element, element->imageElement() == node());
    377 
    378     // It would be more efficient to only repaint the focus ring rectangle
    379     // for the passed-in area element. That would require adding functions
    380     // to the area element class.
    381     repaint();
    382 }
    383 
    384 void RenderImage::paintIntoRect(GraphicsContext* context, const IntRect& rect)
    385 {
    386     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred() || rect.width() <= 0 || rect.height() <= 0)
    387         return;
    388 
    389     RefPtr<Image> img = m_imageResource->image(rect.width(), rect.height());
    390     if (!img || img->isNull())
    391         return;
    392 
    393     HTMLImageElement* imageElt = (node() && node()->hasTagName(imgTag)) ? static_cast<HTMLImageElement*>(node()) : 0;
    394     CompositeOperator compositeOperator = imageElt ? imageElt->compositeOperator() : CompositeSourceOver;
    395     Image* image = m_imageResource->image().get();
    396     bool useLowQualityScaling = shouldPaintAtLowQuality(context, image, image, rect.size());
    397     context->drawImage(m_imageResource->image(rect.width(), rect.height()).get(), style()->colorSpace(), rect, compositeOperator, useLowQualityScaling);
    398 }
    399 
    400 int RenderImage::minimumReplacedHeight() const
    401 {
    402     return m_imageResource->errorOccurred() ? intrinsicSize().height() : 0;
    403 }
    404 
    405 HTMLMapElement* RenderImage::imageMap() const
    406 {
    407     HTMLImageElement* i = node() && node()->hasTagName(imgTag) ? static_cast<HTMLImageElement*>(node()) : 0;
    408     return i ? i->document()->getImageMap(i->fastGetAttribute(usemapAttr)) : 0;
    409 }
    410 
    411 bool RenderImage::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction hitTestAction)
    412 {
    413     HitTestResult tempResult(result.point(), result.topPadding(), result.rightPadding(), result.bottomPadding(), result.leftPadding());
    414     bool inside = RenderReplaced::nodeAtPoint(request, tempResult, x, y, tx, ty, hitTestAction);
    415 
    416     if (tempResult.innerNode() && node()) {
    417         if (HTMLMapElement* map = imageMap()) {
    418             IntRect contentBox = contentBoxRect();
    419             float zoom = style()->effectiveZoom();
    420             int mapX = lroundf((x - tx - this->x() - contentBox.x()) / zoom);
    421             int mapY = lroundf((y - ty - this->y() - contentBox.y()) / zoom);
    422             if (map->mapMouseEvent(mapX, mapY, contentBox.size(), tempResult))
    423                 tempResult.setInnerNonSharedNode(node());
    424         }
    425     }
    426 
    427     if (!inside && result.isRectBasedTest())
    428         result.append(tempResult);
    429     if (inside)
    430         result = tempResult;
    431     return inside;
    432 }
    433 
    434 void RenderImage::updateAltText()
    435 {
    436     if (!node())
    437         return;
    438 
    439     if (node()->hasTagName(inputTag))
    440         m_altText = static_cast<HTMLInputElement*>(node())->altText();
    441     else if (node()->hasTagName(imgTag))
    442         m_altText = static_cast<HTMLImageElement*>(node())->altText();
    443 #if ENABLE(WML)
    444     else if (node()->hasTagName(WMLNames::imgTag))
    445         m_altText = static_cast<WMLImageElement*>(node())->altText();
    446 #endif
    447 }
    448 
    449 bool RenderImage::isLogicalWidthSpecified() const
    450 {
    451     switch (style()->logicalWidth().type()) {
    452         case Fixed:
    453         case Percent:
    454             return true;
    455         case Auto:
    456         case Relative: // FIXME: Shouldn't this case return true?
    457         case Intrinsic:
    458         case MinIntrinsic:
    459             return false;
    460     }
    461     ASSERT(false);
    462     return false;
    463 }
    464 
    465 bool RenderImage::isLogicalHeightSpecified() const
    466 {
    467     switch (style()->logicalHeight().type()) {
    468         case Fixed:
    469         case Percent:
    470             return true;
    471         case Auto:
    472         case Relative: // FIXME: Shouldn't this case return true?
    473         case Intrinsic:
    474         case MinIntrinsic:
    475             return false;
    476     }
    477     ASSERT(false);
    478     return false;
    479 }
    480 
    481 int RenderImage::computeReplacedLogicalWidth(bool includeMaxWidth) const
    482 {
    483     if (m_imageResource->imageHasRelativeWidth())
    484         if (RenderObject* cb = isPositioned() ? container() : containingBlock()) {
    485             if (cb->isBox())
    486                 m_imageResource->setImageContainerSize(IntSize(toRenderBox(cb)->availableWidth(), toRenderBox(cb)->availableHeight()));
    487         }
    488 
    489     int logicalWidth;
    490     if (isLogicalWidthSpecified())
    491         logicalWidth = computeReplacedLogicalWidthUsing(style()->logicalWidth());
    492     else if (m_imageResource->usesImageContainerSize()) {
    493         IntSize size = m_imageResource->imageSize(style()->effectiveZoom());
    494         logicalWidth = style()->isHorizontalWritingMode() ? size.width() : size.height();
    495     } else if (m_imageResource->imageHasRelativeWidth())
    496         logicalWidth = 0; // If the image is relatively-sized, set the width to 0 until there is a set container size.
    497     else
    498         logicalWidth = calcAspectRatioLogicalWidth();
    499 
    500     int minLogicalWidth = computeReplacedLogicalWidthUsing(style()->logicalMinWidth());
    501     int maxLogicalWidth = !includeMaxWidth || style()->logicalMaxWidth().isUndefined() ? logicalWidth : computeReplacedLogicalWidthUsing(style()->logicalMaxWidth());
    502 
    503 #ifdef ANDROID_LAYOUT
    504     logicalWidth = max(minLogicalWidth, min(logicalWidth, maxLogicalWidth));
    505     // in SSR mode, we will fit the image to its container width
    506     if (document()->settings()->layoutAlgorithm() == Settings::kLayoutSSR) {
    507         int cw = containingBlockLogicalWidthForContent();
    508         if (cw && logicalWidth > cw)
    509             logicalWidth = cw;
    510     }
    511     return logicalWidth;
    512 #else
    513     return max(minLogicalWidth, min(logicalWidth, maxLogicalWidth));
    514 #endif
    515 }
    516 
    517 int RenderImage::computeReplacedLogicalHeight() const
    518 {
    519     int logicalHeight;
    520     if (isLogicalHeightSpecified())
    521         logicalHeight = computeReplacedLogicalHeightUsing(style()->logicalHeight());
    522     else if (m_imageResource->usesImageContainerSize()) {
    523         IntSize size = m_imageResource->imageSize(style()->effectiveZoom());
    524         logicalHeight = style()->isHorizontalWritingMode() ? size.height() : size.width();
    525     } else if (m_imageResource->imageHasRelativeHeight())
    526         logicalHeight = 0; // If the image is relatively-sized, set the height to 0 until there is a set container size.
    527     else
    528         logicalHeight = calcAspectRatioLogicalHeight();
    529 
    530     int minLogicalHeight = computeReplacedLogicalHeightUsing(style()->logicalMinHeight());
    531     int maxLogicalHeight = style()->logicalMaxHeight().isUndefined() ? logicalHeight : computeReplacedLogicalHeightUsing(style()->logicalMaxHeight());
    532 
    533 #ifdef ANDROID_LAYOUT
    534     logicalHeight = max(minLogicalHeight, min(logicalHeight, maxLogicalHeight));
    535     // in SSR mode, we will fit the image to its container width
    536     if (logicalHeight && document()->settings()->layoutAlgorithm() == Settings::kLayoutSSR) {
    537         int logicalWidth;
    538         if (isLogicalWidthSpecified())
    539             logicalWidth = computeReplacedLogicalWidthUsing(style()->width());
    540         else
    541             logicalWidth = calcAspectRatioLogicalWidth();
    542         int minLogicalWidth = computeReplacedLogicalWidthUsing(style()->minWidth());
    543         int maxLogicalWidth = style()->maxWidth().value() == undefinedLength ? logicalWidth :
    544             computeReplacedLogicalWidthUsing(style()->maxWidth());
    545         logicalWidth = max(minLogicalWidth, min(logicalWidth, maxLogicalWidth));
    546 
    547         int cw = containingBlockLogicalWidthForContent();
    548         if (cw && logicalWidth && logicalWidth > cw)
    549             logicalHeight = cw * logicalHeight / logicalWidth;   // preserve aspect ratio
    550     }
    551     return logicalHeight;
    552 #else
    553     return max(minLogicalHeight, min(logicalHeight, maxLogicalHeight));
    554 #endif
    555 }
    556 
    557 int RenderImage::calcAspectRatioLogicalWidth() const
    558 {
    559     int intrinsicWidth = intrinsicLogicalWidth();
    560     int intrinsicHeight = intrinsicLogicalHeight();
    561     if (!intrinsicHeight)
    562         return 0;
    563     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred())
    564         return intrinsicWidth; // Don't bother scaling.
    565     return RenderBox::computeReplacedLogicalHeight() * intrinsicWidth / intrinsicHeight;
    566 }
    567 
    568 int RenderImage::calcAspectRatioLogicalHeight() const
    569 {
    570     int intrinsicWidth = intrinsicLogicalWidth();
    571     int intrinsicHeight = intrinsicLogicalHeight();
    572     if (!intrinsicWidth)
    573         return 0;
    574     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred())
    575         return intrinsicHeight; // Don't bother scaling.
    576     return RenderBox::computeReplacedLogicalWidth() * intrinsicHeight / intrinsicWidth;
    577 }
    578 
    579 } // namespace WebCore
    580