cutiepi-rotation-scripts/bin/cutiepi-screen-common

#!/bin/bash

# Ensure that the display variable is set
[ -z "$DISPLAY" ] && export DISPLAY=:0

screen_rotation() {
    cur_rotation=$(xrandr --query --verbose | grep DSI-1 | cut -d ' ' -f 5)
    echo $cur_rotation
}

touchscreen_id() {
    xinput | grep -i 'Capacitive TouchScreen' | grep pointer | sed -r -e 's/.*id=([0-9]+).*/\1/'
}

screen_set_horizontal() {
    xrandr --output DSI-1 --rotate left
    touch_id=$(touchscreen_id)
    xinput set-prop $touch_id "Coordinate Transformation Matrix" 0 -1 1 1 0 0 0 0 1
}

screen_set_vertical() {
    xrandr --output DSI-1 --rotate normal
    touch_id=$(touchscreen_id)
    xinput set-prop $touch_id "Coordinate Transformation Matrix" 1 0 0 0 1 0 0 0 1
}

screen_set_horizontal_inverted() {
    xrandr --output DSI-1 --rotate right
    touch_id=$(touchscreen_id)
    xinput set-prop $touch_id "Coordinate Transformation Matrix" 0 1 0 -1 0 1 0 0 1
}

screen_set_vertical_inverted() {
    xrandr --output DSI-1 --rotate inverted
    touch_id=$(touchscreen_id)
    xinput set-prop $touch_id "Coordinate Transformation Matrix" -1 0 1 0 -1 1 0 0 1
}