[Webkit-unassigned] [Bug 61824] New: Does transform-style=flat imply drawing in document order?

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=61824

           Summary: Does transform-style=flat imply drawing in document
                    order?
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: vangelis at chromium.org
                CC: simon.fraser at apple.com, cmarrin at apple.com,
                    jamesr at chromium.org


Should children of an element with -webkit-transform-style set to flat draw in document order or be depth sorted?  

Safari depth sorts whereas Chrome's compositor doesn't. My take is that unless the transform-style of the parent is set to preserves-3d, children should be drawn in their document (or z-index) order but I don't think the spec is clear about this.

This page demonstrates the difference:

http://dl.dropbox.com/u/2176065/perspective/index.html#album-4

(you'll need to mouse over the covers on the right to get them to flip around)

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