Bug 258947

Summary:	Use composited masking for clip-path which uses an SVG path reference
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Compositing	Assignee:	Simon Fraser (smfr) <simon.fraser>
Status:	NEW ---
Severity:	Normal	CC:	simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 16
Hardware:	Unspecified
OS:	Unspecified

Description Simon Fraser (smfr) 2023-07-06 14:34:48 PDT

For clip-path which references SVG (e.g. `clip-path: url(#foo);`) we currently paint the mask into a masking compositing layer, which is inefficient when we repaint that mask on every frame, as we do on stackoverflow.com.

Comment 1 Radar WebKit Bug Importer 2023-07-06 14:35:06 PDT

<rdar://problem/111870932>

Comment 2 Simon Fraser (smfr) 2023-07-06 14:44:49 PDT

Pull request: https://github.com/WebKit/WebKit/pull/15612