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List:       kwin
Subject:    [Bug 205465] New: Window Decorations don't honor PaintClipper
From:       Michael Zanetti <michael_zanetti () gmx ! net>
Date:       2009-08-28 9:42:30
Message-ID: bug-205465-4790 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=205465

           Summary: Window Decorations don't honor PaintClipper
           Product: kwin
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kwin@kde.org
        ReportedBy: michael_zanetti@gmx.net


Version:            (using KDE 4.3.0)
OS:                Linux
Installed from:    Unlisted Binary Package

The new ARGB decos don't honor clipped regions set by effects using
PaintClipper. Because of this, the decos (but now window contents) are drawn if
a window overlaps a clipped area.

You can reproduce this easily by using the SlideBack effect with a normal
window (e.g. dolphin) and konsole (black color theme). Switch between the two
windows using your mouse. Every once in while (when SlideBack uses the
PaintCliper) you will notice the wrong paint cycles. Theoretically this issue
should show up every time an effect uses PaintClipper.

Related mailing list thread:
http://lists.kde.org/?l=kwin&m=124388283613067&w=2

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