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OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

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Alexandre Quessy

OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

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)

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,
--
Alexandre Quessy
http://alexandre.quessy.net/

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Stefan Sauer

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

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
> 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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Vincent Torri

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Alexandre Quessy

> 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.

You can also try Evas [1], which supports OpenGL, among other backends.
I've written a gstreamer sink for it.

regards

Vincent Torri

[1] http://www.enlightenment.org/

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Alexandre Quessy

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Stefan Sauer

Hello,

2010/4/19 Stefan Kost <[hidden email]>:

> 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.

aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
setting xwindow id
Close
aalex@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@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@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
setting xwindow id
Close
aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
setting xwindow id
Close
aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
setting xwindow id
Close
aalex@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,
>>
>
>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>

--
Alexandre Quessy
http://alexandre.quessy.net/

------------------------------------------------------------------------------
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proactively, and fine-tune applications for parallel performance.
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Alexandre Quessy

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Vincent Torri

2010/4/19 Vincent Torri <[hidden email]>:

>
>
>> 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.
>
> You can also try Evas [1], which supports OpenGL, among other backends.
> I've written a gstreamer sink for it.

Hello Vincent,
That might be interesting for my application, even though the toolkit
I know best so far is GTK+.
Have you got some example code for an OpenGL application in Evas?

Thanks,
Alexandre

>
> regards
>
> Vincent Torri
>
> [1] http://www.enlightenment.org/
>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>

Filippo

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Alexandre Quessy

On Tue, Apr 20, 2010 at 9:34 AM, Alexandre Quessy <[hidden email]> wrote:

>> Please tell use which example is unstable for you and what is the exact
>> error. As such gstreamer and gtk is a solid team.
>
> 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.
>

If I recall correctly those examples were never updated after gtk
moved to client-side-windows.
With that gtk+ changes you can never be sure that a gdkwindow is bound
to a X11 handle unless you call gdk_window_ensure_native().
That's most probably the reason for the errors you are getting, it
doesn't have anything to do with opengl.

Hope this helps,
Filippo

------------------------------------------------------------------------------
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Vincent Torri

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Alexandre Quessy

Hey,

On Tue, 20 Apr 2010, Alexandre Quessy wrote:

> 2010/4/19 Vincent Torri <[hidden email]>:

>> You can also try Evas [1], which supports OpenGL, among other backends.
>> I've written a gstreamer sink for it.
>
> Hello Vincent,
> That might be interesting for my application, even though the toolkit
> I know best so far is GTK+.
> Have you got some example code for an OpenGL application in Evas?

Here it is:

http://pastebin.ca/1869233

Evas is a canvas. You add objects on it. The example above creates a
window with a canvas in it, and it add 2 rectangles, one white of size the
window, another yellow one.

OpenGL is used to accelerate the 2d rendering. It is not used here to (and
it can't) create 3d objects.

To use the software engine, change line line 14 by:

ee = ecore_evas_new ("software_xlib", 10, 10, 200, 200, NULL);

That example uses the low level API. There is another higher level API,
more closed to what a toolkit should provide.

Vincent Torri

------------------------------------------------------------------------------
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Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
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Stefan Sauer

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Alexandre Quessy

Alexandre Quessy wrote:

> Hello,
>
> 2010/4/19 Stefan Kost <[hidden email]>:
>
>> 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@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@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@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@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@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,
>>>
>>>
>> ------------------------------------------------------------------------------
>> Download Intel® Parallel Studio Eval
>> Try the new software tools for yourself. Speed compiling, find bugs
>> proactively, and fine-tune applications for parallel performance.
>> See why Intel Parallel Studio got high marks during beta.
>> http://p.sf.net/sfu/intel-sw-dev
>> _______________________________________________
>> gstreamer-devel mailing list
>> [hidden email]
>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>
>>
>
>
>
>

------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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sledge hammer

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Alexandre Quessy

Are you using AIGLX? I had similar problems when I had turned on "desktop effects"...

> Date: Tue, 20 Apr 2010 03:34:02 -0400
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [gst-devel] OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx
>
> Hello,
>
> 2010/4/19 Stefan Kost <[hidden email]>:
> > 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.
>
>
> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@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@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@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$ ./gtkxoverlay
> setting xwindow id
> Close
> aalex@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,
> >>
> >
> >
> > ------------------------------------------------------------------------------
> > Download Intel® Parallel Studio Eval
> > Try the new software tools for yourself. Speed compiling, find bugs
> > proactively, and fine-tune applications for parallel performance.
> > See why Intel Parallel Studio got high marks during beta.
> > http://p.sf.net/sfu/intel-sw-dev
> > _______________________________________________
> > gstreamer-devel mailing list
> > [hidden email]
> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
> >
>
>
>
> --
> Alexandre Quessy
> http://alexandre.quessy.net/
>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

Το email σας και πολλά ακόμα εν κινήσει. Αποκτήστε δωρεάν το Windows Live Hotmail. Εγγραφείτε τώρα.
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
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Alexandre Quessy

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

2010/4/20 sledge hammer <[hidden email]>:
> Are you using AIGLX? I had similar problems when I had turned on "desktop
> effects"...
>

I don't use "Desktop effects", no. My hardware is a Nvidia that seems
fully accelerated.

a

>> Date: Tue, 20 Apr 2010 03:34:02 -0400
>> From: [hidden email]
>> To: [hidden email]
>> Subject: Re: [gst-devel] OpenGL context: GTK X overlay v/s SDL v/s Clutter
>> v/s Wx
>>
>> Hello,
>>
>> 2010/4/19 Stefan Kost <[hidden email]>:
>> > 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.
>>
>>
>> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$
>> ./gtkxoverlay
>> setting xwindow id
>> Close
>> aalex@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@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@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$
>> ./gtkxoverlay
>> setting xwindow id
>> Close
>> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$
>> ./gtkxoverlay
>> setting xwindow id
>> Close
>> aalex@plouf:~/src/gst-plugins-gl/tests/examples/gtk/gtkxoverlay$
>> ./gtkxoverlay
>> setting xwindow id
>> Close
>> aalex@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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>> http://alexandre.quessy.net/
>>
>>
>> ------------------------------------------------------------------------------
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Alexandre Quessy

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

In reply to this post by Filippo

Hello,

2010/4/20 Filippo Argiolas <[hidden email]>:

> On Tue, Apr 20, 2010 at 9:34 AM, Alexandre Quessy <[hidden email]> wrote:
>>> Please tell use which example is unstable for you and what is the exact
>>> error. As such gstreamer and gtk is a solid team.
>>
>> 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.
>>
>
> If I recall correctly those examples were never updated after gtk
> moved to client-side-windows.
> With that gtk+ changes you can never be sure that a gdkwindow is bound
> to a X11 handle unless you call gdk_window_ensure_native().
> That's most probably the reason for the errors you are getting, it
> doesn't have anything to do with opengl.

It seems like this is the reason to my problems. I would have saved a
few weeks if they had been updated... Anyways, thanks for telling us!

Maybe someone should fix the GTK examples?

Thanks,
Alex

>
> Hope this helps,
> Filippo
>
> ------------------------------------------------------------------------------
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> Try the new software tools for yourself. Speed compiling, find bugs
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http://alexandre.quessy.net/

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Filippo

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

On Wed, Apr 21, 2010 at 6:20 PM, Alexandre Quessy <[hidden email]> wrote:
>> If I recall correctly those examples were never updated after gtk
>> moved to client-side-windows.
>> With that gtk+ changes you can never be sure that a gdkwindow is bound
>> to a X11 handle unless you call gdk_window_ensure_native().
>> That's most probably the reason for the errors you are getting, it
>> doesn't have anything to do with opengl.
>
> It seems like this is the reason to my problems. I would have saved a
> few weeks if they had been updated... Anyways, thanks for telling us!

I'm truly sorry if this caused you such problems. We, in gst-gl,
discussed about it for a while, there is also an open bug in bugzilla
with the reasons of the issues you were seeing and the proper way to
solve it. Somehow this went out of my radar and no one else bothered
to fix it.
Anyway it's not like gst-gl is actively maintained and constantly
updated, it's a bit more than an experiment and you shouldn't really
count on its code as the state of art way of implementing things.
GstXOverlay docs is the correct source of information to look at, it's
updated and contains detailed sample code to start from.

> Maybe someone should fix the GTK examples?

It's on my TODO list now, but don't count on me doing it anytime soon.
If you want to provide a patch I'll be glad to review it ;)

Sorry again,
Regards,

Filippo

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Alexandre Quessy

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

Hello,

2010/4/21 Filippo Argiolas <[hidden email]>:

> On Wed, Apr 21, 2010 at 6:20 PM, Alexandre Quessy <[hidden email]> wrote:
>>> If I recall correctly those examples were never updated after gtk
>>> moved to client-side-windows.
>>> With that gtk+ changes you can never be sure that a gdkwindow is bound
>>> to a X11 handle unless you call gdk_window_ensure_native().
>>> That's most probably the reason for the errors you are getting, it
>>> doesn't have anything to do with opengl.
>>
>> It seems like this is the reason to my problems. I would have saved a
>> few weeks if they had been updated... Anyways, thanks for telling us!
>
> I'm truly sorry if this caused you such problems. We, in gst-gl,
> discussed about it for a while, there is also an open bug in bugzilla
> with the reasons of the issues you were seeing and the proper way to
> solve it. Somehow this went out of my radar and no one else bothered
> to fix it.

Ok, no worries. :)

> Anyway it's not like gst-gl is actively maintained and constantly
> updated, it's a bit more than an experiment and you shouldn't really
> count on its code as the state of art way of implementing things.
> GstXOverlay docs is the correct source of information to look at, it's
> updated and contains detailed sample code to start from.
>

Is it safe to choose it for new software development?

>> Maybe someone should fix the GTK examples?
>
> It's on my TODO list now, but don't count on me doing it anytime soon.
> If you want to provide a patch I'll be glad to review it ;)
>

Ok, I'll put it on my TODO list too, and we'll see what happens.
Regards,

Alex

> Sorry again,
> Regards,
>
> Filippo
>
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Filippo

Re: OpenGL context: GTK X overlay v/s SDL v/s Clutter v/s Wx

On Thu, Apr 22, 2010 at 4:34 AM, Alexandre Quessy <[hidden email]> wrote:

> Hello,
>
> 2010/4/21 Filippo Argiolas <[hidden email]>:
>> On Wed, Apr 21, 2010 at 6:20 PM, Alexandre Quessy <[hidden email]> wrote:
>>>> If I recall correctly those examples were never updated after gtk
>>>> moved to client-side-windows.
>>>> With that gtk+ changes you can never be sure that a gdkwindow is bound
>>>> to a X11 handle unless you call gdk_window_ensure_native().
>>>> That's most probably the reason for the errors you are getting, it
>>>> doesn't have anything to do with opengl.
>>>
>>> It seems like this is the reason to my problems. I would have saved a
>>> few weeks if they had been updated... Anyways, thanks for telling us!
>>
>> I'm truly sorry if this caused you such problems. We, in gst-gl,
>> discussed about it for a while, there is also an open bug in bugzilla
>> with the reasons of the issues you were seeing and the proper way to
>> solve it. Somehow this went out of my radar and no one else bothered
>> to fix it.
>
> Ok, no worries. :)
>
>> Anyway it's not like gst-gl is actively maintained and constantly
>> updated, it's a bit more than an experiment and you shouldn't really
>> count on its code as the state of art way of implementing things.
>> GstXOverlay docs is the correct source of information to look at, it's
>> updated and contains detailed sample code to start from.
>>
>
> Is it safe to choose it for new software development?

Well, I think it is, IMHO the code needs some big polishing but it
offers great potentials, it will surely stay around for a while or be
eventually replaced by a feature equivalent (using cairo-gl backend)
gst-plugins-cairo.
Just consider it "lazily" maintained, i.e. be prepared to work
yourself on any bug you may find instead of relying on the maintainers
doing it.

Hope this helps,
Regards,

Filippo

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