Bug 33320

Summary:	SVG enable-background support missing
Product:	WebKit	Reporter:	Dirk Schulze <krit>
Component:	SVG	Assignee:	Stephen Chenney <schenney>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	eric, grebenshikov.n, jeffschiller, mackyle, rhodovan.u-szeged, schenney, syoichi, thorton, zherczeg, zimmermann
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	PC
OS:	OS X 10.5
Bug Depends on:
Bug Blocks:	6022, 68469, 26389

Description Dirk Schulze 2010-01-07 06:02:09 PST

We should support enable-background. This is mainly neccessary to support other sourceGrapics for filters. But we should implement it in a way, so that we can also use it for SVG Compositing (in SVG 2.0) later.

http://www.w3.org/TR/SVG/filters.html#AccessingBackgroundImage
http://www.w3.org/TR/SVGCompositing/

Comment 1 Dirk Schulze 2010-01-07 11:05:51 PST

We could use repaintRectInLocalCoordinates() of the renderer, where the attribute enable-background is set, create a ImageBuffer and continue further drawings on the context of this ImageBuffer.

Comment 2 Zoltan Herczeg 2012-06-07 21:56:08 PDT

Good idea. Though it is not easy.

Comment 3 Dirk Schulze 2012-06-07 22:36:18 PDT

(In reply to comment #2)
> Good idea. Though it is not easy.

Don't spend to much time at the moment on it. HTML has ti support it as well for Compositing and Blending spec. We will do it hardware accelerated  from the beginning :)

Comment 4 Dirk Schulze 2014-08-15 00:46:31 PDT

We won't support enable-background. The property is deprecated and removed from Filter Effects. Instead we implemented the isolation property. However, accessing the back drop is still not possible yet. This will be the next step. Closing this bug for now.