RESOLVED FIXED311144
Add support for font-synthesis-style: oblique-only 
https://bugs.webkit.org/show_bug.cgi?id=311144
Summary Add support for font-synthesis-style: oblique-only
Brent Fulgham
Reported 2026-03-30 16:16:59 PDT
The CSS Fonts 4 specification adds an 'oblique-only' value for the font-synthesis-style property. When set, it blocks italic-to-oblique face fallback in the font selection algorithm and prevents italic synthesis, while still permitting oblique synthesis from normal faces. This missing longhand was the reason we were failing imported/w3c/web-platform-tests/css/css-fonts/font-synthesis-style-oblique-only.html
Attachments
Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2026-03-30 16:26:06 PDT
<rdar://problem/173730766>
Brent Fulgham
Comment 2 2026-03-30 16:34:39 PDT
See https://drafts.csswg.org/css-fonts-4/#font-synthesis-style
Brent Fulgham
Comment 3 2026-03-30 16:42:41 PDT
Pull request: https://github.com/WebKit/WebKit/pull/61727
EWS
Comment 4 2026-04-01 18:21:59 PDT
Committed 310409@main (671f52fa7c41): <https://commits.webkit.org/310409@main> Reviewed commits have been landed. Closing PR #61727 and removing active labels.
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