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#!/bin/sh
xbacklight -$1 $2 -time 50 -steps 5 2>/dev/null && exit
red=16
green=18
blue=1A
getbl() { bl=$(doas ddcutil getvcp $red | sed 's/.*current value =\s*\([0-9]*\).*/\1/'); } # Get brightness of red channel so we only have to grab one
case "$1" in
dec)
getbl
[ $bl = 0 ] && exit
bl=$(( bl - $2 ))
[ $bl -lt 0 ] && bl=0
;;
inc)
getbl
[ $bl = 100 ] && exit
bl=$(( bl + $2 ))
[ $bl -gt 100 ] && bl=100
;;
set)
bl=$2
[ $bl -lt 0 ] || [ $bl -gt 100 ] && echo "Invalid value" && exit
;;
*)
echo "Invalid option" && exit
;;
esac
for color in $red $green $blue; do doas ddcutil setvcp $color $bl; done
#dwmsbup 20
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