Re: [Qemu-devel] [RfC PATCH 0/3] sdl2: add opengl rendering support

[Gerd Hoffmann]

  Hi,

> Consider mutli-head for a minute. There could be a scenario where we
> want to allow 3d usage in one head, but not in the other head. This
> might in turn mean we would want to enable opengl in one display
> backend but not the other, depending on which head was connected.
> eg so only one tenant gets exclusive usage of the 3d features.
> A single -global wouldn't allow that to be done.

Would be more multi-seat, but yes, obscure but valid use case.

See reply to paolo, when splitting UI initialization into two stages
this should be doable with a per-UI option.

cheers,
  Gerd