180134 2017-11-29 01:53:00 -0800 [WPE] webanimations tests fail 2026-02-05 13:09:38 -0800 1 1 1 Unclassified WebKit WPE WebKit WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 Ms2ger webkit-unassigned aboya bugs-noreply dpino graouts kyle.bavender lmoura zan oldest_to_newest 1375762 0 Ms2ger 2017-11-29 01:53:00 -0800 ... since they were added in r225128. webanimations/left-and-opacity-animation-yields-no-compositing.html [ Failure ] webanimations/opacity-animation-no-longer-composited-upon-completion.html [ Failure ] webanimations/width-and-opacity-separate-animation-yields-no-compositing.html [ Failure ] All in the same way: the -expected file is empty, and the actual result is (GraphicsLayer (anchor 0.00 0.00) (bounds 800.00 600.00) (children 1 (GraphicsLayer (bounds 800.00 600.00) (contentsOpaque 1) ) ) ) 1375785 1 graouts 2017-11-29 05:39:05 -0800 Does WPE support hardware-compositing? 1375859 2 zan 2017-11-29 09:20:50 -0800 It does. I'll check this out on Friday. 1631022 3 lmoura 2020-03-17 20:19:56 -0700 webanimations/opacity-animation.html is also image-failing since added in r255504 1660581 4 dpino 2020-06-08 22:29:35 -0700 webanimations/opacity-animation.html is passing since r262738, likely fixed by r262733. After removing it from test expectations the only test remaining filed under this bug is: webkit.org/b/180134 webanimations/opacity-animation-no-longer-composited-upon-completion.html [ Failure ] 1704384 5 kyle.bavender 2020-11-04 06:21:21 -0800 Ran across a web animations composite issue with opacity out in the wild (https://danielcwilson.com/blog/2020/10/additive-css-animations/ ) on Safari Technology Preview, and noticed the opacity values were not compositing. (Specifically this Pen: https://codepen.io/danwilson/pen/bGpONjp ) — it should be additive and bring the opacity up to 1, is my understanding. If this is not the correct bug for this issue I'm seeing, please point me in the right direction. 1704409 6 graouts 2020-11-04 06:55:35 -0800 @Kyle Bavender: WebKit does not support composite operations yet, see bug 189299. 2178532 7 aboya 2026-02-05 13:09:38 -0800 Closing as fixed by https://bugs.webkit.org/show_bug.cgi?id=306856 since it has been passing since 306711@main was landed.