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List:       kde-bugs-dist
Subject:    [Bug 240354] kwin Window thumbnail upside down in KDE 4.5 beta
From:       Fredrik Höglund  <fredrik () kde ! org>
Date:       2010-06-11 17:35:58
Message-ID: 20100611173558.618A344C79 () immanuel ! kde ! org
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https://bugs.kde.org/show_bug.cgi?id=240354


Fredrik Höglund <fredrik@kde.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |fredrik@kde.org
         Resolution|                            |UPSTREAM




--- Comment #7 from Fredrik Höglund <fredrik kde org>  2010-06-11 19:35:56 ---
(In reply to comment #5)
> I'm not sure, but this happens after I upgrade to kde 4.5 beta, it works quite
> well in kde 4.4.* though..

The code has changed in 4.5. If you have a graphics card with programmable
shaders, KWin will now use a high-quality scaling filter when it generates the
thumbnails.

The problem you are seeing happens when glCopyTexSubImage is used on a
framebuffer object, which it is in the new code. This bug was fixed in Mesa
commit a68e8a4eaadfe2a1e4999d5e378c7d9fa99dc656, but it appears that this
commit is only in the master branch, i.e. the branch that will become Mesa 7.9.

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