gstreamer_gl (rust) on Windows

[Matthew Waters]

Windows is special in that some drivers cannot share OpenGL resources
while any related OpenGL context is active in any thread.

This means, you would need to deactivate glutin's OpenGL context, do the
share, and then reactivate glutin's OpenGL context.

An example of this is available in the qmlglsink code:
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/blob/main/subprojects/gst-plugins-good/ext/qt/gstqtglutility.cc#L263

Cheers
-Matt

On 1/2/22 09:07, Steven Fontaine via gstreamer-devel wrote:
> Apologies for the double-reply, but here's some extra context for that
> last error that might make it more helpful:
>
> Received error from
> /GstPipeline:pipeline0/GstGLSinkBin:glsinkbin0/GstGLUploadElement:gluploadelement0:
>
>     failed to share contexts through wglShareLists 0xaa
>     (debug: Some("../gst-libs/gst/gl/gstglbasefilter.c(608):
>     gst_gl_base_filter_find_gl_context_unlocked ():
>     /GstPipeline:pipeline0/GstGLSinkBin:glsinkbin0/GstGLUploadElement:gluploadelement0"))
>
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