[Webkit-unassigned] [Bug 120108] New: Incorrect Z sorting of layers with preserve-3d

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=120108

           Summary: Incorrect Z sorting of layers with preserve-3d
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://desandro.github.io/3dtransforms/examples/cube-0
                    1-steps.html
        OS/Version: Mac OS X 10.8
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: anilsson at rim.com
                CC: anilsson at rim.com


On http://desandro.github.io/3dtransforms/examples/cube-01-steps.html, the elements that form the sides of the cube are listed in order 1, 2, 3, 4, 5, 6 in the HTML source.

Steps to reproduce:
Load http://desandro.github.io/3dtransforms/examples/cube-01-steps.html
Press 2. Rotate faces

Expected:
Face 2 is z sorted in front of 1 after transition ends

Actual:
Face 1 is z sorted in front of 2

Discussion:
We believe the bug is due to Safari not preserving painter's algorithm order of coplanar layers.

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