[Webkit-unassigned] [Bug 115873] New: [CSS Regions] Transformed content in named flows using 2D transform that overflows region box is clipped

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=115873

           Summary: [CSS Regions] Transformed content in named flows using
                    2D transform that overflows region box is clipped
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dalcala at adobe.com


Transformed content in named flows using 2D transform that overflows region box is clipped.  I couldn't find anything in the spec that says the source content that is transformed should be clipped.  By default, the overflow content should show.

Reproduction steps:
Open the attached file scaleY-webkit-bug-region-clipping2.html in a browser that supports regions (Chrome Canary or WebKit Nightly) on Windows or Mac.

Actual Results:
You see a 100px x 100px green square.  The bottom half of the green rectangle is getting clipped by the region div. 

Expected Results:
You should see a 100px x 200px green rectangle – the source content that overflows the region is not clipped by the region.  See scaleY-webkit-bug-region-clipping2-no-region.html for how it should look. Or, if you remove the transform (scaleY-webkit-bug-region-clipping2-no-transform.html), you can see that the source content that overflows the region also is not clipped by the region.

Workaround:
None

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