[Marble-devel] Using Marble library with Qt Embedded

Wed May 23 14:17:34 UTC 2012

I tried that also but I'm really not lucky : whatever the map theme I 
choose to load in Marble widget, it crashes. So it doesn't seem to be 
related neither.

Regards,
-- 
Jérémie Scheer
Software Engineer
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26
Armadeus Systems - A new vision of the embedded world
http://www.armadeus.com

On 05/23/2012 03:51 PM, Dennis Nienhüser wrote:
> Hi,
>
> can you try whether using the plain.dgml theme 
> ("earth/plain/plain.dgml") instead of openstreetmap.dgml helps? This 
> map theme does not have any texture layers. The texture layers make 
> use of threads as well.
>
> Regards,
> Dennis
>
> Am 23.05.2012 15:36, schrieb Jeremie Scheer:
>> Hi,
>>
>> Thank you for your answer.
>>
>> Unfortunately it doesn't seem to be the plugins that cause the thread 
>> issue.
>> I tried what you suggested me to do but I always run into the same 
>> error with QMutex.
>>
>> It is the same error that makes my application crash in a Qt Virtual 
>> Framebuffer or on ARM platform.
>>
>> Regards,
>> -- 
>> Jérémie Scheer
>> Software Engineer
>> Tel: +33 (0)9 72 29 41 44
>> Fax: +33 (0)9 72 28 79 26
>> Armadeus Systems - A new vision of the embedded world
>> http://www.armadeus.com
>>
>>
>> On 05/23/2012 01:25 PM, Dennis Nienhüser wrote:
>>> I started looking into it yesterday but Qt Embedded wasn't compiling 
>>> on my system due to some known bug where glib and webkit interfere.
>>>
>>> I'd suggest trying to move all marble plugins away first (just 
>>> remove them from lib/marble/plugins in the installation directory of 
>>> marble) and see if that changes things. Might be some threading 
>>> issue, the parser plugins working on startup for example run in 
>>> their own thread each.
>>>
>>> Regards,
>>> Dennis
>>>
>>> Am 23.05.2012 11:12, schrieb Jeremie Scheer:
>>>> Any idea ?
>>>>
>>>> Is it simply possible to use Marble in a Qt Virtual Framebuffer 
>>>> with Qt Embedded ?
>>>>
>>>> I think it should be, because I found this link on the Internet 
>>>> http://wm161.net/2008/07/26/marble-under-qtembedded-linux/ . A 
>>>> little bit old but it shows that Marble could run under Qt Embedded.
>>>>
>>>> I can't see what is the origin of the bug because I've no QThread 
>>>> or QMutex in my application. It can only come from the compilation 
>>>> of Marble...
>>>>
>>>> My Qt Embedded is configured like this:
>>>>
>>>>     configure -embedded x86_64 -no-cups -no-nis -depths 16,18 -qvfb
>>>>     -prefix /usr/local/Trolltech/QtEmbedded-4.7.2 -glib
>>>>     -confirm-license -qt-sql-sqlite
>>>>
>>>>
>>>> And I configure Marble to build against Qt like this:
>>>>
>>>>     PATH=/usr/local/Trolltech/QtEmbedded-4.7.2/bin:$PATH cmake
>>>>     -DQTONLY=ON ../marble_qvfb/
>>>>
>>>>
>>>> Regards,
>>>>
>>>> Jérémie SCHEER
>>>>
>>>>
>>>> On 05/22/2012 04:13 PM, Jeremie Scheer wrote:
>>>>> Hi,
>>>>>
>>>>> I'm currently trying to use a Marble library built against _Qt 
>>>>> 4.7.4 Embedded x86_.
>>>>>
>>>>> My application using Marble is built against the same Qt and is 
>>>>> running in a Qt Virtual Framebuffer with a QWS Server.
>>>>>
>>>>> In the Qt project file, I simply added : /LIBS = -lmarblewidget/ 
>>>>> to link with Marble. And when running the application, I defined 
>>>>> the environment variable /LD_LIBRARY_PATH=/usr/local/lib/ where 
>>>>> Marble libraries are installed.
>>>>>
>>>>> The problem is : when I run the application, before any 
>>>>> instruction can be executed, it crashes on :
>>>>>
>>>>> QMutex::lock: Deadlock detected in thread 0x7f1fe30bb740
>>>>>
>>>>>
>>>>> Here is my application code :
>>>>>
>>>>>     #include <QtGui/QApplication>
>>>>>     #include <marble/MarbleWidget.h>
>>>>>     #include <marble/MarbleModel.h>
>>>>>     #include <marble/global.h>
>>>>>     #include <QWSServer>
>>>>>
>>>>>     using namespace Marble;
>>>>>
>>>>>     int main(int argc, char** argv)
>>>>>     {
>>>>>         QApplication app(argc,argv);
>>>>>         QWSServer *sw =  QWSServer::instance ();
>>>>>
>>>>>         // Create a Marble QWidget without a parent
>>>>>         MarbleWidget *mapWidget = new MarbleWidget();
>>>>>
>>>>>         // Load the OpenStreetMap map
>>>>>        
>>>>>     mapWidget->setMapThemeId("earth/openstreetmap/openstreetmap.dgml");
>>>>>         mapWidget->setProjection(Mercator);
>>>>>
>>>>>         mapWidget->show();
>>>>>
>>>>>         return app.exec();
>>>>>     }
>>>>>
>>>>>
>>>>> If I build the same application (without the QWS Server) and 
>>>>> Marble against Qt x86, it works well.
>>>>>
>>>>> Is there anything I did wrong with Qt Embedded ?
>>>>>
>>>>> Thanks,
>>>>> -- 
>>>>> Jérémie Scheer
>>>>> Software Engineer
>>>>> Tel: +33 (0)9 72 29 41 44
>>>>> Fax: +33 (0)9 72 28 79 26
>>>>> ARMadeus Systems - A new vision of the embedded world
>>>>> http://www.armadeus.com
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Marble-devel mailing list
>>>>> Marble-devel at kde.org
>>>>> https://mail.kde.org/mailman/listinfo/marble-devel
>>>>
>>>>
>>>> -- 
>>>> Jérémie Scheer
>>>> Software Engineer
>>>> Tel: +33 (0)9 72 29 41 44
>>>> Fax: +33 (0)9 72 28 79 26
>>>> ARMadeus Systems - A new vision of the embedded world
>>>> http://www.armadeus.com
>>>>
>>>>
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>>>> Marble-devel at kde.org
>>>> https://mail.kde.org/mailman/listinfo/marble-devel
>>>
>>>
>>>
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>>
>>
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>
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