void SVGImagePainter::paintForeground(const PaintInfo& paintInfo) {
const LayoutImageResource* imageResource = m_layoutSVGImage.imageResource();
IntSize imageViewportSize = expandedIntSize(computeImageViewportSize());
if (imageViewportSize.isEmpty())
return;
RefPtr<Image> image = imageResource->image(
imageViewportSize, m_layoutSVGImage.style()->effectiveZoom());
FloatRect destRect = m_layoutSVGImage.objectBoundingBox();
FloatRect srcRect(0, 0, image->width(), image->height());
SVGImageElement* imageElement = toSVGImageElement(m_layoutSVGImage.element());
imageElement->preserveAspectRatio()->currentValue()->transformRect(destRect,
srcRect);
InterpolationQuality interpolationQuality = InterpolationDefault;
interpolationQuality = ImageQualityController::imageQualityController()
->chooseInterpolationQuality(
m_layoutSVGImage, image.get(), image.get(),
LayoutSize(destRect.size()));
InterpolationQuality previousInterpolationQuality =
paintInfo.context.imageInterpolationQuality();
paintInfo.context.setImageInterpolationQuality(interpolationQuality);
paintInfo.context.drawImage(image.get(), destRect, &srcRect);
paintInfo.context.setImageInterpolationQuality(previousInterpolationQuality);
}
void LayoutSVGImage::updateImageContainerSize()
{
ImageResource* cachedImage = m_imageResource->cachedImage();
if (!cachedImage || !cachedImage->usesImageContainerSize())
return;
FloatSize imageViewportSize = computeImageViewportSize(*cachedImage);
if (LayoutSize(imageViewportSize) != m_imageResource->imageSize(styleRef().effectiveZoom())
|| !containerSizeIsSetForLayoutObject(*cachedImage, this)) {
m_imageResource->setContainerSizeForLayoutObject(roundedIntSize(imageViewportSize));
}
}
