[Webkit-unassigned] [Bug 201681] New: Scaling an element containing a video rasterises other elements such as text and svgs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=201681

            Bug ID: 201681
           Summary: Scaling an element containing a video rasterises other
                    elements such as text and svgs
           Product: WebKit
           Version: Safari 12
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: samuel.wemyss at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 378549

  --> https://bugs.webkit.org/attachment.cgi?id=378549&action=review

Sample testcases of the described bug

Safari rasterises/pixelates all clip-paths, images and vector elements such as svgs and text when there is a video element present, and that element is scaled.

See the sample testcase file attached for a full list of cases where this occurs, it also seems to occur when two elements are seperately scaled but overlap (see the last 2 testcases)

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