[gst-devel] OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

Stefan Kost ensonic at hora-obscura.de
Tue Apr 20 10:30:09 CEST 2010


Alexandre Quessy wrote:
> Hello,
>
> 2010/4/19 Stefan Kost <ensonic at hora-obscura.de>:
>   
>> Alexandre Quessy wrote:
>>     
>>> Hello everyone,
>>> I am still hesitating between SDL, GTK, WxWidgets and Clutter, (not
>>> QT) for creating an OpenGL context for the Toonloop 2.x application.
>>>
>>> So far, I have a prototype in SDL, but I am still unsatisfied about
>>> how SDL 1.2 handles the fullscreen mode on Ubuntu GNU/Linux. I have
>>> done some very satisfying prototype with GtkGLExt regaring the
>>> fullscreen mode, but I still didn't put any Gstreamer video in it. As
>>> for the current GTK examples, they seem to crash very often on my
>>> computers, so I gave them up. I don't want to write an unstable
>>> application! (the error messages says that an X resource is not
>>> available)
>>>
>>>       
>> Please tell use which example is unstable for you and what is the exact
>> error. As such gstreamer and gtk is a solid team.
>>
>> Stefan
>>     
>
> As you can see in the shell log below, setting the X window ID
> sometimes fails. It seems like sometimes the X resource is not
> available. In some cases, the window appears to be grey, and nothing
> happens until the application crashes. Sometimes it works, but
> sometimes it doesn't. I am testing the gtkxoverlay example that is
> shipped with the current Git version of gst-plugins-gl. I am running
> an up-to-date Ubuntu Karmic 9.10 on an Intel Core 2 Duo 2.2 GHz with 2
> Gb of RAM and the Nvidia driver.
>   
There are overlay tests in gst-plugin-base. Please try those as well :)

Stefan

>
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> gtkxoverlay: ../../src/xcb_io.c:176: process_responses: Assertion
> `!(req && current_request && !(((long) (req->sequence) - (long)
> (current_request)) <= 0))' failed.
> Aborted
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> gtkxoverlay: Fatal IO error 11 (Resource temporarily unavailable) on X
> server :0.0.
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex at plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> gtkxoverlay: Fatal IO error 11 (Resource temporarily unavailable) on X
> server :0.0.
>
>
> Regards,
> Alexandre
>
>
>
>   
>>> Before putting 1-2 days in porting the examples to GtkGLExt, I would
>>> like to hear some success stories or advices regarding one of those
>>> toolkits or another. So, does anyone has good reasons to recommend one
>>> or another? Maybe Clutter would be to be considered? I draw my shapes
>>> and textures using some low-level vertex manipulation, and I use GLSL
>>> shaders and such.
>>>
>>> Thanks,
>>>
>>>       
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>>     
>
>
>
>   





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