void SVGFELightElement::childrenChanged(const ChildChange& change)
{
    SVGElement::childrenChanged(change);

    if (change.source == ChildChangeSourceParser)
        return;
    ContainerNode* parent = parentNode();
    if (!parent)
        return;
    RenderElement* renderer = parent->renderer();
    if (renderer && renderer->isSVGResourceFilterPrimitive())
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
}
void invalidateFilterPrimitiveParent(SVGElement* element)
{
    if (!element)
        return;

    ContainerNode* parent = element->parentNode();

    if (!parent)
        return;

    RenderElement* renderer = parent->renderer();
    if (!renderer || !renderer->isSVGResourceFilterPrimitive())
        return;

    RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer, false);
}
void SVGResourcesCache::clientStyleChanged(RenderElement& renderer, StyleDifference diff, const RenderStyle& newStyle)
{
    if (diff == StyleDifferenceEqual || !renderer.parent())
        return;

    // In this case the proper SVGFE*Element will decide whether the modified CSS properties require a relayout or repaint.
    if (renderer.isSVGResourceFilterPrimitive() && (diff == StyleDifferenceRepaint || diff == StyleDifferenceRepaintIfTextOrBorderOrOutline))
        return;

    // Dynamic changes of CSS properties like 'clip-path' may require us to recompute the associated resources for a renderer.
    // FIXME: Avoid passing in a useless StyleDifference, but instead compare oldStyle/newStyle to see which resources changed
    // to be able to selectively rebuild individual resources, instead of all of them.
    if (rendererCanHaveResources(renderer)) {
        SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
        cache->removeResourcesFromRenderer(renderer);
        cache->addResourcesFromRenderer(renderer, newStyle);
    }

    RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false);

    if (renderer.element() && !renderer.element()->isSVGElement())
        renderer.element()->setNeedsStyleRecalc(SyntheticStyleChange);
}