25 lines
652 B
Bash
25 lines
652 B
Bash
|
#!/bin/bash
|
||
|
|
|
||
|
|
# Don't start a new transition if the previous one isn't done yet
|
||
|
|
pgrep -u $UID -x xbacklight >/dev/null && exit
|
||
|
|
|
||
|
|
# Calculate new target brightness
|
||
|
|
current_brightness=$(xbacklight -get)
|
||
|
|
case $1 in
|
||
|
|
up)
|
||
|
|
target=$((current_brightness * 15 / 10))
|
||
|
|
[ $target -ne $current_brightness ] || target=$((target + 1))
|
||
|
|
;;
|
||
|
|
down)
|
||
|
|
target=$((current_brightness * 10 / 15))
|
||
|
|
[ $target -ne $current_brightness ] || target=$((target - 1))
|
||
|
|
;;
|
||
|
|
esac
|
||
|
|
|
||
|
|
# Boundaries: can't go higher than 100% or lower than 1%
|
||
|
|
[ $target -le 1 ] && target=1
|
||
|
|
[ $target -ge 100 ] && target=100
|
||
|
|
|
||
|
|
# Smoothly set the new brightness
|
||
|
|
xbacklight -time 100 -fps 42 -set $target
|