Bug 186154

Summary: Support Images Module Level 4's double-position gradient color stop syntax
Product: WebKit Reporter: Florin Malita <fmalita>
Component: CSSAssignee: Megan Gardner <megan_gardner>
Status: RESOLVED FIXED    
Severity: Enhancement CC: commit-queue, dino, megan_gardner, sabouhallawa, simon.fraser
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch for landing none

Description Florin Malita 2018-05-31 12:00:46 PDT 
CSS Images Module Level 4 extends the gradient color-stop syntax to support specifying two positions [1].  This is equivalent to repeating the color for each position, and comes in handy when defining solid color gradient spans -- e.g.

  red 0%, green 50%, green 100%   =>   red 0%, green 50% 100%

CSSWG has approved double-position color stop syntax for shipping ([2],[3]), and we are considering shipping in Blink [4].  Mozilla is also looking at implementing [5].

I'm opening this bug to get some signals from the WebKit community regarding this feature.

Thanks!


[1] https://drafts.csswg.org/css-images-4/#color-stop-syntax
[2] https://github.com/w3c/csswg-drafts/issues/2439
[3] https://www.w3.org/2018/03/28-css-minutes.html#item07
[4] https://groups.google.com/a/chromium.org/forum/#!topic/Blink-dev/8B9FbeTBIK0
[5] https://bugzilla.mozilla.org/show_bug.cgi?id=1352643
Comment 1 Florin Malita 2018-05-31 12:15:15 PDT 
WPT coverage: https://wpt.fyi/results/css/css-images/gradient/color-stops-parsing.html
Comment 2 Megan Gardner 2018-09-18 13:58:08 PDT 
*** Bug 189640 has been marked as a duplicate of this bug. ***
Comment 3 Megan Gardner 2018-09-18 13:58:56 PDT 
<rdar://problem/44158152>
Comment 4 Megan Gardner 2018-09-18 14:00:51 PDT 
Created attachment 350050 [details]
Patch for landing
Comment 5 WebKit Commit Bot 2018-09-18 14:38:27 PDT 
Comment on attachment 350050 [details]
Patch for landing

Clearing flags on attachment: 350050

Committed r236155: <https://trac.webkit.org/changeset/236155>
Comment 6 WebKit Commit Bot 2018-09-18 14:38:28 PDT 
All reviewed patches have been landed.  Closing bug.