Jonas Ådahl 102aa59ce3 cogl/gl-framebuffer: Move stereo mode state flushing to backend
It's currently only handled by a surface backend framebuffer (assuming
the right GLX extensions are available). While it's theoretically
possible to do the same with the offcreen by having multiple textures,
it's not supported, so leave the FBO variant with a single warning if we
end up there.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1514>
2021-01-30 09:11:46 +00:00
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