[Webkit-unassigned] [Bug 220850] New: Pieces of prior text draw remain when redrawing after updating text properties

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220850

            Bug ID: 220850
           Summary: Pieces of prior text draw remain when redrawing after
                    updating text properties
           Product: WebKit
           Version: Safari 14
          Hardware: Mac (Intel)
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ifiz.dev at gmail.com
                CC: zimmermann at kde.org

Created attachment 418121

  --> https://bugs.webkit.org/attachment.cgi?id=418121&action=review

Consistent reproduction pattern

Redrawing a text element after font family or font size changes can result in pieces of the old draw remaining on screen. 
It mainly seems to occur when the updated text has decreased in size in comparison to before the update.

Resizing the window, removing focus from the window or changing style attributes on the text element will clear the remnants of the old draw. 

This seems to be dependent on the used font, but can be consistently reproduced (see attachment).

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