On Tue, Dec 19, 2017 at 10:15:06AM +0200, Pekka Paalanen wrote: > 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?
The plan is to refresh and clean up the proof-of-concept Weston implementation and propose it. For those interested to take an early look the p-o-c code is at: https://gitlab.collabora.com/alf/weston/commits/zwp-input-timestamps > Alf, what would you have for the client side of the implementation? The weston p-o-c implementation branch includes tests that I think exhibit well the client side use of this protocol, but if that's not sufficient I am happy to add or enhance an example client to use this protocol. Thanks, Alexandros _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/wayland-devel
