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, 13 insertions, 0 deletions

diff --git a/sway/input/input-manager.c b/sway/input/input-manager.c
index a2a1e274..195acc6f 100644
--- a/sway/input/input-manager.c
+++ b/sway/input/input-manager.c
@@ -281,6 +281,13 @@ static void input_manager_libinput_config_touch(
                 log_libinput_config_status(libinput_device_config_send_events_set_mode(
                                         libinput_device, ic->send_events));
         }
+        float *m = ic->calibration_matrix.matrix;
+        if (ic->calibration_matrix.configured) {
+                sway_log(SWAY_DEBUG, "libinput_config_touch(%s) calibration_set_matrix(%f %f %f %f %f %f)",
+                        ic->identifier, m[0], m[1], m[2], m[3], m[4], m[5]);
+                log_libinput_config_status(libinput_device_config_calibration_set_matrix(
+                                        libinput_device, ic->calibration_matrix.matrix));
+        }
 }
 
 static void input_manager_libinput_reset_touch(
@@ -300,6 +307,12 @@ static void input_manager_libinput_reset_touch(
                 input_device->identifier, send_events);
         log_libinput_config_status(libinput_device_config_send_events_set_mode(
                                 libinput_device, send_events));
+        float m[6];
+        libinput_device_config_calibration_get_default_matrix(libinput_device, m);
+        sway_log(SWAY_DEBUG, "libinput_reset_touch(%s) calibration_set_matrix(%f %f %f %f %f %f)",
+                input_device->identifier, m[0], m[1], m[2], m[3], m[4], m[5]);
+        log_libinput_config_status(libinput_device_config_calibration_set_matrix(
+                                libinput_device, m));
 }
 
 static void input_manager_libinput_config_pointer(