Add calibration_matrix config option

Can be used to change the orientation of a touchscreen.

Example usage with swaymsg:

    # identity
    swaymsg input type:touch calibration_matrix '"1 0 0 0 1 0"'

    # 90 degree clockwise
    swaymsg input type:touch calibration_matrix '"0 -1 1 1 0 0"'

    # 180 degree clockwise
    swaymsg input type:touch calibration_matrix '"-1 0 1 0 -1 1"'

    # 270 degree clockwise
    swaymsg input type:touch calibration_matrix '"0 1 0 -1 0 1"'

Documentation:

    https://wayland.freedesktop.org/libinput/doc/latest/absolute-axes.html#calibration-of-absolute-devices

1 files changed, 3 insertions, 0 deletions

diff --git a/sway/sway-input.5.scd b/sway/sway-input.5.scd
index be173c45..4fb14fd2 100644
--- a/sway/sway-input.5.scd
+++ b/sway/sway-input.5.scd
@@ -97,6 +97,9 @@ The following commands may only be used in the configuration file.
 *input* <identifier> accel_profile adaptive|flat
         Sets the pointer acceleration profile for the specified input device.
 
+*input* <identifier> calibration_matrix <6 space-separated floating point values>
+        Sets the calibtration matrix.
+
 *input* <identifier> click_method none|button_areas|clickfinger
         Changes the click method for the specified device.