clients: add a new touchscreen calibrator
The new calibrator uses weston_touch_calibration protocol extension and
provides the following features:
- chooses the physical touch device to be calibrated by DEVPATH or by
the output/head name; device enumeration provided
- the compositor ensures the calibrator window is shown in the correct
position and size
- no matter how wrong the old calibration is, the touch events will
always arrive in the application
- the calibration is complete, not incremental; the received touch
events are guaranteed to be unmodified
- computes a libinput style calibration matrix directly, not the
WL_CALIBRATION format
- supports multiple touch devices: calibrate one device at a time, and
show user feedback on touching a wrong device instead of recording bad
data
- uses four touch point samples: three to compute the calibration, and
one to verify the calibration is roughly correct
- consistent exit codes
- upload the new calibration into the server after successful
and verified calibration
Due to using special touchscreen calibration protocol extension, this
application cannot be tested without touch input from the compositor.
Practically all of the above mentioned are unlike how the old
calibrator client worked.
Co-developed by Louis-Francis and Pekka.
v2:
- improve help() text
- rename wrong_touch_handler() to invalid_touch_handler()
- improve debug prints by adding sample number
- reorganize code into sample funcs vs. touch funcs
- add a state machine to properly process touch and related events
Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
v1 Tested-by: Matt Hoosier <matt.hoosier@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
5 files changed
