AffineTransform SVGLayoutSupport::deprecatedCalculateTransformToLayer(
const LayoutObject* layoutObject) {
AffineTransform transform;
while (layoutObject) {
transform = layoutObject->localToSVGParentTransform() * transform;
if (layoutObject->isSVGRoot())
break;
layoutObject = layoutObject->parent();
}
// Continue walking up the layer tree, accumulating CSS transforms.
// FIXME: this queries layer compositing state - which is not
// supported during layout. Hence, the result may not include all CSS
// transforms.
PaintLayer* layer = layoutObject ? layoutObject->enclosingLayer() : 0;
while (layer && layer->isAllowedToQueryCompositingState()) {
// We can stop at compositing layers, to match the backing resolution.
// FIXME: should we be computing the transform to the nearest composited
// layer, or the nearest composited layer that does not paint into its
// ancestor? I think this is the nearest composited ancestor since we will
// inherit its transforms in the composited layer tree.
if (layer->compositingState() != NotComposited)
break;
if (TransformationMatrix* layerTransform = layer->transform())
transform = layerTransform->toAffineTransform() * transform;
layer = layer->parent();
}
return transform;
}
