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();
}
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());
}
