634493 - SVG filters on HTML elements don't filter the background

Status: RESOLVED INVALID

(Core :: Graphics, enhancement)

Description

[Patrick Walton (:pcwalton)]

If you apply a filter to an HTML element, it doesn't affect things beneath it. IMHO this would be more useful than the current behavior of affecting only the content; often you use SVG filters for things like background elements drawn over a page while a page-modal dialog is up on the screen.

Comment 1

[Robert O'Callahan (:roc) (email my personal email if necessary)]

The SVG spec is quite clear that SVG filters only affect the element. However, there is a "BackgroundImage" feature that lets the filter grab the background and manipulate it. We don't support that feature yet.
http://www.w3.org/TR/SVG/filters.html#AccessingBackgroundImage

Comment 2

[Ali Juma [:ajuma]]

(In reply to Robert O'Callahan (:roc) (Mozilla Corporation) from comment #1)
> The SVG spec is quite clear that SVG filters only affect the element.

Closing based on this comment.