void SVGRenderSupport::computeContainerBoundingBoxes(const RenderElement* container, FloatRect& objectBoundingBox, bool& objectBoundingBoxValid, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox)
{
objectBoundingBox = FloatRect();
objectBoundingBoxValid = false;
strokeBoundingBox = FloatRect();
// When computing the strokeBoundingBox, we use the repaintRects of the container's children so that the container's stroke includes
// the resources applied to the children (such as clips and filters). This allows filters applied to containers to correctly bound
// the children, and also improves inlining of SVG content, as the stroke bound is used in that situation also.
for (RenderObject* current = container->firstChild(); current; current = current->nextSibling()) {
if (current->isSVGHiddenContainer())
continue;
const AffineTransform& transform = current->localToParentTransform();
if (transform.isIdentity()) {
updateObjectBoundingBox(objectBoundingBox, objectBoundingBoxValid, current, current->objectBoundingBox());
strokeBoundingBox.unite(current->repaintRectInLocalCoordinates());
} else {
updateObjectBoundingBox(objectBoundingBox, objectBoundingBoxValid, current, transform.mapRect(current->objectBoundingBox()));
strokeBoundingBox.unite(transform.mapRect(current->repaintRectInLocalCoordinates()));
}
}
repaintBoundingBox = strokeBoundingBox;
}
void SVGLayoutSupport::computeContainerBoundingBoxes(const LayoutObject* container, FloatRect& objectBoundingBox, bool& objectBoundingBoxValid, FloatRect& strokeBoundingBox, FloatRect& paintInvalidationBoundingBox)
{
objectBoundingBox = FloatRect();
objectBoundingBoxValid = false;
strokeBoundingBox = FloatRect();
// When computing the strokeBoundingBox, we use the paintInvalidationRects of the container's children so that the container's stroke includes
// the resources applied to the children (such as clips and filters). This allows filters applied to containers to correctly bound
// the children, and also improves inlining of SVG content, as the stroke bound is used in that situation also.
for (LayoutObject* current = container->slowFirstChild(); current; current = current->nextSibling()) {
if (current->isSVGHiddenContainer())
continue;
// Don't include elements in the union that do not layout.
if (current->isSVGShape() && toLayoutSVGShape(current)->isShapeEmpty())
continue;
const AffineTransform& transform = current->localToParentTransform();
updateObjectBoundingBox(objectBoundingBox, objectBoundingBoxValid, current,
transform.mapRect(current->objectBoundingBox()));
strokeBoundingBox.unite(transform.mapRect(current->paintInvalidationRectInLocalCoordinates()));
}
paintInvalidationBoundingBox = strokeBoundingBox;
}
