Bug 225185 – [Image-Set]: Support Resolution and Type as optional arguments

• Status: RESOLVED
• Resolution: FIXED
• Component: CSS

[Oliver Williams]

Safari seems to not currently support the type option, which allows new image formats like webp to be used while specifying a fall-back image in a more well supported format like jpeg or png. 

background-image: image-set( "foo.avif" type("image/avif"), "foo.jpg" type("image/jpeg") );

The relevant part of spec is here: https://drafts.csswg.org/css-images-4/#image-set-notation

[Radar WebKit Bug Importer]

<rdar://problem/77598590>

[Karl Dubost]

This is failing a couple of tests in 
http://wpt.live/css/css-images/image-set/image-set-computed.sub.html

and has impact on Interop 2023.

[Karl Dubost]

Also:

http://wpt.live/css/css-images/image-set/image-set-type-first-match-rendering.html 
http://wpt.live/css/css-images/image-set/image-set-type-rendering-2.html
http://wpt.live/css/css-images/image-set/image-set-type-rendering-3.html
http://wpt.live/css/css-images/image-set/image-set-type-rendering.html
http://wpt.live/css/css-images/image-set/image-set-type-skip-unsupported-rendering.html

[Ryan Reno]

Resolution is also an optional parameter. As of right now we require resolution like the -webkit-image-set function did.

[Ryan Reno]

*** Bug 251197 has been marked as a duplicate of this bug. ***

[Ryan Reno]

Pull request: https://github.com/WebKit/WebKit/pull/10623

[EWS]

Committed 260796@main (e3554c53fff0): <https://commits.webkit.org/260796@main>

Reviewed commits have been landed. Closing PR #10623 and removing active labels.