[Webkit-unassigned] [Bug 161299] New: When transformed element has a reflection, children with backface-visibility produces opposite effect

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161299

            Bug ID: 161299
           Summary: When transformed element has a reflection, children
                    with backface-visibility produces opposite effect
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nathan at maxmo.net

Created attachment 287230
  --> https://bugs.webkit.org/attachment.cgi?id=287230&action=review
HTML and CSS to reproduce the issue

This came up while I was looking into another bug involving backface visibility. If a containing element has a 3D transform and a reflection, then backface-visibility: hidden produces the reverse effect for contained elements (that is, elements that should be hidden are visible and elements that are visible should be hidden).

The attached HTML file provides an illustration of this. box1 and box3 should be visible (and are if the reflection is removed), while box2 should be hidden (and is if the reflection is removed).

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