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List:       kde-core-devel
Subject:    KIO::PreviewJob pixmaps + Qt4.5 crashes
From:       Aleix Pol <aleixpol () kde ! org>
Date:       2009-03-13 0:40:51
Message-ID: 757d9a550903121740m2ef4d3d4yc64d82b5ebc18212 () mail ! gmail ! com
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Hi,
While developing an application we've (me and afiestas) found that there is
some problems while trying to paint QPixmaps that come from a
KIO::PreviewJob. Here I am sending a program that exposes this problem and a
couple of backtraces that might be of some use.

The problem seems to be related to the new Qt 4.5 and its many
--graphicssystem backends since, after some research we've noticed that it
kind of works if we pass as a paremeter "--graphicssystem opengl" (with some
problems), it works perfectly if we put "--grahicssystem <anything>" (yes,
if it is not recognized it works just fine, maybe it is the old X11
environment?) and if we do not put anything or "--graphicssystem raster" it
crashes when the image is resized.

Same happens on both systems tested, both using GNU/Linux environments. This
crash happens also in dolphin (when used with the information panel, because
there is a thumbnail drawn inside), same arguments workaround is applicable
(--graphicssystem).

Is there any additional information needed?

Thanks,
Aleix Pol

backtraces: http://proli.net/meu/kde/backtraces
project: http://proli.net/meu/kde/qpixmap_crash.tar.bz2

[Attachment #3 (text/html)]

Hi,<br>While developing an application we&#39;ve (me and afiestas) found
that there is some problems while trying to paint QPixmaps that come
from a KIO::PreviewJob. Here I am sending a program that exposes this
problem and a couple of backtraces that might be of some use.<br>
<br>The problem seems to be related to the new Qt 4.5 and its many
--graphicssystem backends since, after some research we&#39;ve noticed that
it kind of works if we pass as a paremeter &quot;--graphicssystem opengl&quot;
(with some problems), it works perfectly if we put &quot;--grahicssystem
&lt;anything&gt;&quot; (yes, if it is not recognized it works just fine,
maybe it is the old X11 environment?) and if we do not put anything or
&quot;--graphicssystem raster&quot; it crashes when the image is resized.<br>
<br>Same happens on both systems tested, both using GNU/Linux
environments. This crash happens also in dolphin (when used with the
information panel, because there is a thumbnail drawn inside), same
arguments workaround is applicable (--graphicssystem).<br>
<br>Is there any additional information needed?<br><br>Thanks,<br>Aleix \
Pol<br><br>backtraces: <a \
href="http://proli.net/meu/kde/backtraces">http://proli.net/meu/kde/backtraces</a><br>project: \
<a href="http://proli.net/meu/kde/qpixmap_crash.tar.bz2">http://proli.net/meu/kde/qpixmap_crash.tar.bz2</a><br>




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