TextStream& FEImage::externalRepresentation(TextStream& ts, int indent) const
{
IntSize imageSize;
if (m_image)
imageSize = m_image->size();
else if (LayoutObject* layoutObject = referencedLayoutObject())
imageSize = enclosingIntRect(getLayoutObjectRepaintRect(layoutObject)).size();
writeIndent(ts, indent);
ts << "[feImage";
FilterEffect::externalRepresentation(ts);
ts << " image-size=\"" << imageSize.width() << "x" << imageSize.height() << "\"]\n";
// FIXME: should this dump also object returned by SVGFEImage::image() ?
return ts;
}
sk_sp<SkImageFilter> FEImage::createImageFilter()
{
if (auto* layoutObject = referencedLayoutObject())
return createImageFilterForLayoutObject(*layoutObject);
sk_sp<SkImage> image = m_image ? toSkSp(m_image->imageForCurrentFrame()) : nullptr;
if (!image) {
// "A href reference that is an empty image (zero width or zero height), that fails
// to download, is non-existent, or that cannot be displayed (e.g. because it is
// not in a supported image format) fills the filter primitive subregion with
// transparent black."
return createTransparentBlack();
}
FloatRect srcRect = FloatRect(FloatPoint(), FloatSize(m_image->size()));
FloatRect dstRect = filterPrimitiveSubregion();
m_preserveAspectRatio->transformRect(dstRect, srcRect);
return SkImageSource::Make(std::move(image), srcRect, dstRect, kHigh_SkFilterQuality);
}
PassRefPtr<SkImageFilter> FEImage::createImageFilter(SkiaImageFilterBuilder* builder)
{
if (auto* layoutObject = referencedLayoutObject())
return createImageFilterForLayoutObject(*layoutObject, builder);
FloatRect dstRect = filterPrimitiveSubregion();
RefPtr<SkImage> image = m_image ? m_image->imageForCurrentFrame() : nullptr;
if (!image) {
// "A href reference that is an empty image (zero width or zero height), that fails
// to download, is non-existent, or that cannot be displayed (e.g. because it is
// not in a supported image format) fills the filter primitive subregion with
// transparent black."
return adoptRef(SkPictureImageFilter::Create(nullptr, dstRect));
}
FloatRect srcRect = FloatRect(FloatPoint(), m_image->size());
m_preserveAspectRatio->transformRect(dstRect, srcRect);
return adoptRef(SkImageSource::Create(image.get(), srcRect, dstRect, kHigh_SkFilterQuality));
}
FloatRect FEImage::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
LayoutObject* layoutObject = referencedLayoutObject();
if (!m_image && !layoutObject)
return FloatRect();
FloatRect requestedRect = originalRequestedRect;
if (clipsToBounds())
requestedRect.intersect(maxEffectRect());
FloatRect destRect = getFilter()->mapLocalRectToAbsoluteRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (layoutObject) {
srcRect = getLayoutObjectRepaintRect(layoutObject);
SVGElement* contextNode = toSVGElement(layoutObject->node());
if (contextNode->hasRelativeLengths()) {
// FIXME: This fixes relative lengths but breaks non-relative ones (see crbug/260709).
SVGLengthContext lengthContext(contextNode);
FloatSize viewportSize;
if (lengthContext.determineViewport(viewportSize)) {
srcRect = makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect).mapRect(srcRect);
}
} else {
srcRect = getFilter()->mapLocalRectToAbsoluteRect(srcRect);
srcRect.move(destRect.x(), destRect.y());
}
destRect.intersect(srcRect);
} else {
srcRect = FloatRect(FloatPoint(), FloatSize(m_image->size()));
m_preserveAspectRatio->transformRect(destRect, srcRect);
}
destRect.intersect(requestedRect);
addAbsolutePaintRect(destRect);
return destRect;
}
