https://bugs.kde.org/show_bug.cgi?id=205596

           Summary: Incorrect rendering of decoration buttons when
                    compositing is enabled
           Product: kwin
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kwin@kde.org
        ReportedBy: hugo.pereira@free.fr


Version:            (using Devel)
Compiler:          gcc 4.4.1 
OS:                Linux
Installed from:    Compiled sources

Many decorations (namely: keramik, laptop, modern system, quartz, redmond, and
web) have incorrect button rendering when compositing is enabled.
The "black" portions of the buttons are "see-through": one can see the
window/or background that is behind, through the button, as if it was actually
a "hole" in the window.

I think it is an issue with painting a "QBitmap" on the decoration, probably
related to using ARGB. Other decorations, which do not use QBitmap do not have
the problem.

Might be a Qt problem. (using qt4.5.2)

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