[PATCH] Extend wl_surface protocol

[James Courtier-Dutton]

On Nov 2, 2013 11:40 PM, "Axel Davy" <axel.davy at ens.fr> wrote:
>
> Here is another proposition to extend the protocol
> to allow video players to control better the time at
> which frames hit the screen.
>
> Contrary to the original proposition:
>
http://lists.freedesktop.org/archives/wayland-devel/2013-October/011496.html
>
> I do not separate the new request in another interface.
>
> The first request: presentation_time is only an indication to the
compositor,
> and the hit request is a similar feedback to the frame request, but the
> notification is when the frame hit the screen. That's why I don't think it
> should be difficult for some compositors to implement it, and don't feel
the
> need to separate it in another interface.
>
> The requests were designed to help implement the Present extension for
> XWayland. However the Present extension use Microseconds times, instead
> of Milliseconds.
>
> Any feedback is appreciated.
>
> I'm not English native, so if you feel some sentence are incorrect,
> please help me to correct them.
>
Just one question. Which clock is being used. Ideally a monotony one, or
even better, a configurable one. We would normally not want these
timestamps affected by the user changing the system time.

James
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