[Webkit-unassigned] [Bug 221788] New: clip-path does not update dynamically when svg path changes if using GPU rendering

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221788

            Bug ID: 221788
           Summary: clip-path does not update dynamically when svg path
                    changes if using GPU rendering
           Product: WebKit
           Version: Safari 14
          Hardware: Mac (Apple Silicon)
                OS: macOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jonathan at tumult.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 420072

  --> https://bugs.webkit.org/attachment.cgi?id=420072&action=review

Reproduction document

If a CSS clip-path is set to an element that uses a SVG id, changing the "d" component does not update the clip path immediately when the element uses GPU acceleration (via transform:rotateY(0deg).

If you resize the window or do something to force redrawing, it will show up correctly.  Not using GPU rendering also will make this work.  It is not a problem on Chrome/Firefox.

I've attached a reproduction case. Click the shape to get the clip path to change. After clicking, do something like resize the window and you'll see it change then.

This affects content made with Tumult Hype [https://tumult.com/hype/].

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