Bug 245276

Summary:	Update CSS Color parsing and serialization to match the current spec
Product:	WebKit	Reporter:	Sam Weinig <sam>
Component:	CSS	Assignee:	Sam Weinig <sam>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	karlcow, ntim, webkit-bug-importer
Priority:	P2	Keywords:	BrowserCompat, InRadar
Version:	Other
Hardware:	Unspecified
OS:	Unspecified

Description Sam Weinig 2022-09-16 08:31:51 PDT

CSS Color 4 has made a few parsing and serialization changes we should match:

- lch/lab/oklch/oklab all now take percent or number for all the non-hue components (with some new normalization / scaling rules for the percents)
- lch/lab/oklch/oklab all now serialize using the numeric form for all non-hue components.

Since we now want to serialize using the numeric form, we can also use this opportunity to remove the extra multiplications and divisions by 100 for oklch/oklab that we had to keep lightness as a percent, and just always keep it in the numeric form.

Comment 1 Radar WebKit Bug Importer 2022-09-16 08:40:45 PDT

<rdar://problem/100028649>

Comment 2 Sam Weinig 2022-09-16 09:33:51 PDT

Pull request: https://github.com/WebKit/WebKit/pull/4419

Comment 3 Tim Nguyen (:ntim) 2022-09-16 10:17:07 PDT

*** Bug 245134 has been marked as a duplicate of this bug. ***

Comment 4 EWS 2022-09-20 12:04:37 PDT

Committed 254688@main (8913e90d9b69): <https://commits.webkit.org/254688@main>

Reviewed commits have been landed. Closing PR #4419 and removing active labels.