[Webkit-unassigned] [Bug 167456] New: Element with a backdrop-filter and a mask may not correctly mask the backdrop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=167456

            Bug ID: 167456
           Summary: Element with a backdrop-filter and a mask may not
                    correctly mask the backdrop
    Classification: Unclassified
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: graouts at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

We did some work in this area already as part of https://bugs.webkit.org/show_bug.cgi?id=142662, but there is a case where an element with both a "backdrop-filter" and a "mask" may not correctly clip the backdrop layer. This happens mostly on WK1 but can happen infrequently on WK2 as well.

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