Bug 43739

Summary:	Remove support for ctx.globalCompositeOperation = 'darker'
Product:	WebKit	Reporter:	Ms2ger (he/him; ⌚ UTC+1/+2) <Ms2ger>
Component:	DOM	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	karlcow, kling, mustaf.here
Priority:	P2	Keywords:	BrowserCompat, WPTImpact
Version:	528+ (Nightly build)
Hardware:	All
OS:	All

Description Ms2ger (he/him; ⌚ UTC+1/+2) 2010-08-09 12:44:18 PDT

It was removed from the specification in 2007. [1] Mozilla also removed support. [2]

[1] <http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2007-May/011335.html>
[2] <https://bugzilla.mozilla.org/show_bug.cgi?id=571532>

Comment 1 Mustafizur Rahaman (rahaman) 2011-06-01 00:21:09 PDT

https://bugs.webkit.org/show_bug.cgi?id=48289 was raised for similar issue. If we remove this feature, both of these would be resolved.

Comment 2 Mustafizur Rahaman (rahaman) 2011-06-20 11:20:11 PDT

As per discussion on https://bugs.webkit.org/show_bug.cgi?id=48288, we would not remove "darker" support. We can mark the bug as WONTFIX

Comment 3 Andreas Kling 2011-12-04 05:36:45 PST

Closing per discussion on bug 48288.

Comment 4 Karl Dubost 2023-01-12 21:52:00 PST

This decision was made 10 years ago in Bug 48288. 
I wonder if the compatibility issue has changed 10 years later. 


Given that both Firefox and Chrome do not support it. 
http://wpt.live/html/canvas/element/compositing/2d.composite.operation.darker.html
https://wpt.fyi/results/html/canvas/element/compositing/2d.composite.operation.darker.html