[Webkit-unassigned] [Bug 94013] New: When zooming in page, borders with em units scale up too much

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=94013

           Summary: When zooming in page, borders with em units scale up
                    too much
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://jsfiddle.net/m6cFE/1/
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: markus.magnuson at gmail.com


Created an attachment (id=158392)
 --> (https://bugs.webkit.org/attachment.cgi?id=158392&action=review)
Screenshot showing the incorrect zoom behavior of a 1em content box with a 1em border.

1. Go to http://jsfiddle.net/m6cFE/1/
2. Zoom in the page a few times (e.g. cmd+)
3. The 1em content box will have scaled up correctly, but the 1em border will incorrectly have scaled up too much.

Since both content box and border is 1em, they should scale the same amount when zooming. Instead, the border scales up too much.

Attached is a screenshot showing the 1em content box with a 1em border, with page zoom at 125% (approximately, since I can't find out how to see the current zoom level in Safari/WebKit).

Obviously the border has become larger than the content box, even though they should be the same.

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