[Webkit-unassigned] [Bug 185816] New: Run clip-path animations on the compositor
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon May 21 00:53:10 PDT 2018
https://bugs.webkit.org/show_bug.cgi?id=185816
Bug ID: 185816
Summary: Run clip-path animations on the compositor
Product: WebKit
Version: Safari Technology Preview
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: CSS
Assignee: webkit-unassigned at lists.webkit.org
Reporter: jaffathecake at gmail.com
http://output.jsbin.com/ticeve/quiet - this is a CSS animation. If you hit the 'jank' button (which causes the event loop to block), the reveal/hide part of the animation stutters.
It's common in UI for a transition to include scale/translation, but also some kind of revealing/hiding.
The former is easy to do entirely on the compositor, and avoid any kind of main thread jank, but the latter isn't.
You can kinda work around it by translating an element within an element that's overflow:hidden, but it gets complicated fast.
Ideally clip-path would work entirely on the compositor, and not jank like the demo page.
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