[Webkit-unassigned] [Bug 265362] New: Element flickers when transitioning boxShadow with large spread value
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Sun Nov 26 22:15:00 PST 2023
https://bugs.webkit.org/show_bug.cgi?id=265362
Bug ID: 265362
Summary: Element flickers when transitioning boxShadow with
large spread value
Product: WebKit
Version: Safari 17
Hardware: Mac (Apple Silicon)
OS: macOS 14
Status: NEW
Severity: Normal
Priority: P2
Component: Layout and Rendering
Assignee: webkit-unassigned at lists.webkit.org
Reporter: bunnnywong at gmail.com
CC: bfulgham at webkit.org, simon.fraser at apple.com,
zalan at apple.com
Created attachment 468761
--> https://bugs.webkit.org/attachment.cgi?id=468761&action=review
a page to reproduce the flickering issue
Element flickers when transitioning `box-shadow` with a large spread value, see the attached html file and screen recording.
This issue happens when the element has non-zero `border-radius` and non-integer `margin`s.
It happens only on macOS 14.
Force using using `PathRoundedRect::Strategy::PreferBezier` for `PathCG::addRoundedRect(const FloatRoundedRect&, PathRoundedRect::Strategy)` seems to work around this issue.
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