On Mon, 18 Dec 2017 14:55:00 +0200 Alexandros Frantzis <alexandros.frant...@collabora.com> wrote:
> wl_pointer, wl_keyboard and wl_touch events currently use a 32-bit > timestamp with millisecond resolution. In some cases, notably latency > measurements, this resolution is too coarse to be useful. > > This protocol provides additional high-resolution timestamps events, > which are emitted before the corresponding input event. Each timestamp > event contains a high-resolution, and ideally higher-accuracy, version > of the 'time' argument of the first subsequent supported input event. > > Clients that care about high-resolution timestamps just need to keep > track of the last timestamp event they receive and associate it with the > next supported input event that arrives. > > Signed-off-by: Alexandros Frantzis <alexandros.frant...@collabora.com> > Reviewed-by: Pekka Paalanen <pekka.paala...@collabora.co.uk> > Acked-by: Jonas Ådahl <jad...@gmail.com> > --- > > Changes in v2: > - Add '...carrying a timestamp...' to better describe the set of subsequent > input events in the timestamp event description. > - Clarify normalization requirements of tv_sec_hi, tv_sec_lo, tv_nsec > timestamp representation. > > Makefile.am | 1 + > unstable/input-timestamps/README | 4 + > .../input-timestamps-unstable-v1.xml | 145 > +++++++++++++++++++++ > 3 files changed, 150 insertions(+) > create mode 100644 unstable/input-timestamps/README > create mode 100644 unstable/input-timestamps/input-timestamps-unstable-v1.xml Cool! I suppose we want to see the Weston implementation patches posted to the list before landing this? Alf, what would you have for the client side of the implementation? Thanks, pq
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