[PATCH weston 00/25] A new touchscreen calibrator

[Pekka Paalanen]

On Fri, 23 Mar 2018 08:46:46 -0500
Matt Hoosier <matt.hoosier at gmail.com> wrote:

> I am very much in favor of the overall approach on this patch series.
> I've experienced every single one of the problems described in this
> summary, and my company currently resorts to maintaining a hacky
> out-of-tree calibration tool to paper over these problems.

Hi Matt,

that is very heartwarming to hear. Is your tool specifically for Weston
too?

I would be very happy if this proposal fits your needs, and certainly
interested in hearing where it falls short.


Thanks,
pq

> On Fri, Mar 23, 2018 at 7:00 AM, Pekka Paalanen <ppaalanen at gmail.com> wrote:
> > From: Pekka Paalanen <pekka.paalanen at collabora.co.uk>
> >
> > Hi all,
> >
> > the existing touchscreen calibrator in Weston has several problems. This
> > proposal intends to solve them all by introducing a new protocol
> > extension for touchscreen calibration and a new calibrator tool.
> >
> > The benefits of the new tool, which the old tool lacks, are:
> >
> > - You can unambiguously pick a physical touch device to calibrate.
> >
> > - You can be sure your touch events come only from that particular
> >   device, and that you cannot miss touch events even if the current
> >   calibration is horribly wrong.
> >
> > - You can be sure the calibration window (pattern) is shown on the right
> >   output with the right coordinates.
> >
> > - You can unambiguously calibrate even multiple touchscreens that are
> >   all cloned (showing the same image).
> >
> > - You get a libinput style calibation matrix instead of the
> >   WL_CALIBRATION format which depends on output resolution.
> >
> > - You can load a new calibration into the compositor without playing
> >   tricks with udev or restarting the compositor.
> >
> > There is more discussion about the topic at:
> > https://phabricator.freedesktop.org/T7868
> >
> > This patch series depends on the clone mode series:
> > https://patchwork.freedesktop.org/series/32898/
> >
> > There is a full branch available at:
> > https://gitlab.collabora.com/pq/weston/commits/touchcalib-1

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