bool RenderSVGImage::updateImageViewport()
{
SVGImageElement* image = toSVGImageElement(element());
FloatRect oldBoundaries = m_objectBoundingBox;
bool updatedViewport = false;
SVGLengthContext lengthContext(image);
m_objectBoundingBox = FloatRect(image->xCurrentValue().value(lengthContext), image->yCurrentValue().value(lengthContext), image->widthCurrentValue().value(lengthContext), image->heightCurrentValue().value(lengthContext));
// Images with preserveAspectRatio=none should force non-uniform scaling. This can be achieved
// by setting the image's container size to its intrinsic size.
// See: http://www.w3.org/TR/SVG/single-page.html, 7.8 The ‘preserveAspectRatio’ attribute.
if (image->preserveAspectRatioCurrentValue().align() == SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE) {
if (ImageResource* cachedImage = m_imageResource->cachedImage()) {
LayoutSize intrinsicSize = cachedImage->imageSizeForRenderer(0, style()->effectiveZoom());
if (intrinsicSize != m_imageResource->imageSize(style()->effectiveZoom())) {
m_imageResource->setContainerSizeForRenderer(roundedIntSize(intrinsicSize));
updatedViewport = true;
}
}
}
if (oldBoundaries != m_objectBoundingBox) {
if (!updatedViewport)
m_imageResource->setContainerSizeForRenderer(enclosingIntRect(m_objectBoundingBox).size());
updatedViewport = true;
m_needsBoundariesUpdate = true;
}
return updatedViewport;
}
void RenderSVGImage::paintForeground(PaintInfo& paintInfo)
{
RefPtr<Image> image = m_imageResource->image();
FloatRect destRect = m_objectBoundingBox;
FloatRect srcRect(0, 0, image->width(), image->height());
SVGImageElement* imageElement = toSVGImageElement(element());
imageElement->preserveAspectRatioCurrentValue().transformRect(destRect, srcRect);
bool useLowQualityScaling = false;
if (style()->svgStyle()->bufferedRendering() != BR_STATIC)
useLowQualityScaling = ImageQualityController::imageQualityController()->shouldPaintAtLowQuality(paintInfo.context, this, image.get(), image.get(), LayoutSize(destRect.size()));
paintInfo.context->drawImage(image.get(), destRect, srcRect, CompositeSourceOver, DoNotRespectImageOrientation, useLowQualityScaling);
}