[Webkit-unassigned] [Bug 191980] New: [GTK] Webkit 2.22.4 Transparency breaks when using non-static element inside fixed container

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191980

            Bug ID: 191980
           Summary: [GTK] Webkit 2.22.4 Transparency breaks when using
                    non-static element inside fixed container
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P3
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hi at liammartens.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 355677

  --> https://bugs.webkit.org/attachment.cgi?id=355677&action=review

Use in transparent Gtk/Webkit combo to reproduce transparency bug

When creating a fully transparent Gtk window and Webkit Web view the transparency goes opaque when using a non-static positioned element inside a fixed positioned element.

For reproduction, the fixed positioned element should be visible (thus should not have a width or height of 0) and the child element should be anything other than static.
For quick setup try using the hudkit sample (https://github.com/anko/hudkit) and load the attached html page. Then toggle #bb2 between static and relative (or absolute / fixed)

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