FloatSize SVGImagePainter::computeImageViewportSize() const {
DCHECK(m_layoutSVGImage.imageResource()->hasImage());
if (toSVGImageElement(m_layoutSVGImage.element())
->preserveAspectRatio()
->currentValue()
->align() != SVGPreserveAspectRatio::kSvgPreserveaspectratioNone)
return m_layoutSVGImage.objectBoundingBox().size();
ImageResourceContent* cachedImage =
m_layoutSVGImage.imageResource()->cachedImage();
// Images with preserveAspectRatio=none should force non-uniform scaling. This
// can be achieved by setting the image's container size to its viewport size
// (i.e. concrete object size returned by the default sizing algorithm.) See
// https://www.w3.org/TR/SVG/single-page.html#coords-PreserveAspectRatioAttribute
// and https://drafts.csswg.org/css-images-3/#default-sizing.
// Avoid returning the size of the broken image.
if (cachedImage->errorOccurred())
return FloatSize();
if (cachedImage->getImage()->isSVGImage())
return toSVGImage(cachedImage->getImage())
->concreteObjectSize(m_layoutSVGImage.objectBoundingBox().size());
return FloatSize(cachedImage->getImage()->size());
}
static Image* renderableImageForCSSValue(CSSValue* value,
const LayoutObject& layoutObject) {
ImageResourceContent* cachedImage =
cachedImageForCSSValue(value, layoutObject.document());
if (!cachedImage || cachedImage->errorOccurred() ||
cachedImage->getImage()->isNull())
return nullptr;
return cachedImage->getImage();
}
static void writeImageToDataObject(DataObject* dataObject,
Element* element,
const KURL& url) {
// Shove image data into a DataObject for use as a file
ImageResourceContent* cachedImage = getImageResourceContent(element);
if (!cachedImage || !cachedImage->getImage() || !cachedImage->isLoaded())
return;
RefPtr<SharedBuffer> imageBuffer = cachedImage->getImage()->data();
if (!imageBuffer || !imageBuffer->size())
return;
String imageExtension = cachedImage->getImage()->filenameExtension();
ASSERT(!imageExtension.isEmpty());
// Determine the filename for the file contents of the image.
String filename = cachedImage->response().suggestedFilename();
if (filename.isEmpty())
filename = url.lastPathComponent();
String fileExtension;
if (filename.isEmpty()) {
filename = element->getAttribute(HTMLNames::altAttr);
} else {
// Strip any existing extension. Assume that alt text is usually not a
// filename.
int extensionIndex = filename.reverseFind('.');
if (extensionIndex != -1) {
fileExtension = filename.substring(extensionIndex + 1);
filename.truncate(extensionIndex);
}
}
if (!fileExtension.isEmpty() && fileExtension != imageExtension) {
String imageMimeType =
MIMETypeRegistry::getMIMETypeForExtension(imageExtension);
ASSERT(imageMimeType.startsWith("image/"));
// Use the file extension only if it has imageMimeType: it's untrustworthy
// otherwise.
if (imageMimeType ==
MIMETypeRegistry::getMIMETypeForExtension(fileExtension))
imageExtension = fileExtension;
}
imageExtension = "." + imageExtension;
validateFilename(filename, imageExtension);
dataObject->addSharedBuffer(filename + imageExtension, imageBuffer);
}
FloatSize LayoutSVGImage::calculateObjectSize() const {
ImageResourceContent* cachedImage = m_imageResource->cachedImage();
if (!cachedImage || cachedImage->errorOccurred())
return m_objectBoundingBox.size();
FloatSize intrinsicSize = FloatSize(cachedImage->getImage()->size());
if (styleRef().width().isAuto() && styleRef().height().isAuto())
return intrinsicSize;
if (styleRef().height().isAuto())
return FloatSize(
m_objectBoundingBox.width(),
resolveHeightForRatio(m_objectBoundingBox.width(), intrinsicSize));
DCHECK(styleRef().width().isAuto());
return FloatSize(
resolveWidthForRatio(m_objectBoundingBox.height(), intrinsicSize),
m_objectBoundingBox.height());
}