using gl context of external app

[Matthew Waters]

On 14/09/15 20:41, Andres Colubri wrote:
> Hi guys,
>
> Thanks for the info. The combination of calls:
>
> GstGLDisplay* display = gst_gl_display_new();
> guintptr context =
> gst_gl_context_get_current_gl_context(GST_GL_HAVE_PLATFORM_CGL);    
> GstGLContext* gstcontext =
> gst_gl_context_new_wrapped(display, context,
> GST_GL_HAVE_PLATFORM_CGL, GST_GL_API_OPENGL);

Shouldn't this be?
s/GST_GL_HAVE_PLATFORM_CGL/GST_GL_PLATFORM_CGL/

> in the bus callback seems like the solution I have been looking for,
> at least on OS X. However, gst_gl_context_get_current_gl_context
> always returns 0, so theres is a problem a problem. Maybe the bus
> callback  is called when the GL context is not current in the calling
> thread.

The gst_gl_context_get_current* family of functions require that the
external context be current in the calling thread for them to work.  The
synchronous bus callback is called from a GStreamer element streaming
thread which is not the main thread.

Cheers
-Matt

> I will also give a try to caopengllayersink once 1.6 is out. 
>
> Cheers,
> Andres
>
>
> On Sun, Sep 6, 2015 at 5:51 AM, Sebastian Dröge
> <sebastian at centricular.com <mailto:sebastian at centricular.com>> wrote:
>
>     On Fr, 2015-09-04 at 11:50 -0400, Andres Colubri wrote:
>     > Hi Matt,
>     >
>     > Cool, thanks for the follow up on OS X. I'm pretty sure that JOGL
>     > doesn't use XQuartz, so it is probably just a NSApp. For Linux and
>     > Windows, it relies on X11 and (if understand the native core
>     > correctly) on the win32 API.
>
>     Note that Matthew also blogged about how to integrate libgstgl with
>     other GL libraries here:
>     http://ystreet00.blogspot.gr/2015/09/gstreamer-16-and-opengl-contexts.html
>
>     Maybe that contains some further useful information for you :)
>
>     > Do you want me to open an issue on the gstreamer tracker requesting
>     > the API enhancement, so at least the discussion is better focused?
>
>     Sounds like a good plan :)
>
>     --
>     Sebastian Dröge, Centricular Ltd · http://www.centricular.com
>
>
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>

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