On Wed, 2018-04-11 at 09:49 +0200, Olivier Fourdan wrote:

> What are the risks of landing it? It would break for hardware/driver
> which are not supported yet anyway?

The code it adds basically only runs on NVIDIA's drivers, since nobody
else supports EGL_KHR_streams (as far as I'm aware, at least). Mesa
doesn't seem to have any interest in adding it, and even if they did
we'd probably prefer to keep using gbm there as the streams approach is
intrinsically one more blit, at least as written.

So the risks are low. The benefit is Xwayland could use glamor instead
of fb. Which you'd think would be a win, as I'm told NVIDIA's GL is
pretty good. In practice it's kind of a wash at the moment. It's
possible that's because glamor is doing something naive in its renderer
or its streams usage, or due to a bug in NVIDIA's driver.

- ajax
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