240061 2022-05-04 03:32:23 -0700 [css-easing-2] Implement linear(...) easing function for css animations 2023-08-14 03:48:11 -0700 1 1 1 Unclassified WebKit Animations Safari 14 Unspecified Unspecified RESOLVED FIXED https://bugzilla.mozilla.org/show_bug.cgi?id=1764126 https://github.com/w3c/csswg-drafts/pull/6533 https://bugs.webkit.org/show_bug.cgi?id=260136 InRadar P2 Normal --- 1 ntim hi augus.dupin cyb.ai.815 dino graouts graouts jaffathecake joris.bruijnzeels safari-dev webkit-bug-importer oldest_to_newest 1866414 0 ntim 2022-05-04 03:32:23 -0700 There's a draft spec here: https://github.com/w3c/csswg-drafts/pull/6533 ...which I think we could start implementing sometime soon. Quoting that github pull-request: The overall goal is to allow something like: .whatever { animation-timing-function: linear(0, 0.003, 0.013, 0.03, 0.05, 0.08, 0.11, 0.15, 0.2, 0.26, 0.31, 0.38, 0.45, 0.53, 0.62, 0.71, 0.81, 0.9, 0.99, 0.94, 0.89, 0.85, 0.82, 0.79, 0.77, 0.76, 0.752, 0.75, 0.755, 0.77, 0.78, 0.81, 0.84, 0.87, 0.92, 0.97, 0.99, 0.97, 0.95, 0.94, 0.938, 0.94, 0.949, 0.96, 0.99, 0.994, 0.986, 0.985, 0.989, 1 100% 100%); } …which would graph like this: https://user-images.githubusercontent.com/93594/130435372-05471f97-7e33-4876-ac45-cc7073eb1f5c.png And here's a demo of how that would animate: https://static-misc-3.glitch.me/linear-easing/ 1868089 1 webkit-bug-importer 2022-05-11 03:33:13 -0700 <rdar://problem/93088094> 1884623 2 jaffathecake 2022-07-17 04:21:26 -0700 I've pushed the spec for this https://drafts.csswg.org/css-easing-2/#the-linear-easing-function. 1967390 3 hi 2023-07-19 13:26:03 -0700 Pull request: https://github.com/WebKit/WebKit/pull/15936 1967558 4 ews-feeder 2023-07-20 18:33:45 -0700 Committed 266195@main (2b0ebfa3b59e): <https://commits.webkit.org/266195@main> Reviewed commits have been landed. Closing PR #15936 and removing active labels. 1971017 5 graouts 2023-08-14 03:47:46 -0700 I expect the changes made in 266196@main are not dealing with accelerated animations. Indeed, CoreAnimation doesn’t have any native equivalent to linear() so we’ll have to either find something that matches and add code to translate to the CA-native primitive or expand KeyframeEffect::canBeAccelerated() to do something similar to what we do with steps(). I argue for the latter because with the work for threaded animation resolution support for linear() will be free and I think it’s not a good idea to add more CA-specific code. Filed bug 260136.