[Bug 740012] gl: support opengl3+ core contexts

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740012
  GStreamer | gst-plugins-bad | git

--- Comment #3 from Matthew Waters <ystreet00 at gmail.com> 2014-11-13 14:00:54 UTC ---
(In reply to comment #2)
> This is another subject but looking at the commits I think we should create
> gstgl API for vao's and vbo's . I can see that gstglcolorconvert, gstglfilter
> and gstglimagesink code around this.

For vbo's and gl buffers in general, I was thinking of some GstMemory subclass
so that it might be possible to pass vertex data through elements (It also
future proofs the 3d modelling side of things where that's pretty much all you
deal with).  also related is bug #726412

I'm still undecided on what to do with vao's for the exact same reason as
framebuffers.  They are simply client-side container objects that are not
shareable across contexts and I'm not sure where they fit in with the gstgl API
yet.

> Also out of curiosity, in theory it should be faster but do you actually see
> any measurable performance gain ?

No, we're not push anywhere near enough vertex data to have any performance
impact :)

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