#!/bin/sh
set -x

IFS="
"

devices="$(xinput list --name-only | grep Wacom)"

setTransform() {
	for d in $devices ; do
		xinput set-prop "$d" --type=float \
			"Coordinate Transformation Matrix" \
			"$@"
	done
}

while [ $# -gt 0 ] ; do case $1 in
	left)
		setTransform \
			0 -1 1 1 0 0 0 0 1
		xrandr -o left
		shift
		;;
	right)
		setTransform \
			0 1 0 -1 0 1 0 0 1
		xrandr -o right
		shift
		;;
	normal)
		setTransform \
			0  0 0 0 0 0 0 0 0
		xrandr -o normal
		shift
		;;
	inverted)
		setTransform \
			-1 0 1 0 -1 1 0 0 1
		xrandr -o inverted
		shift
		;;
	*)
		echo Unknown option "$1";
		shift
		exit 1
	;;
esac ; done