dotfiles/.config/redshift/hooks/brightness.sh
2020-02-05 19:42:02 +01:00

61 lines
1.5 KiB
Bash

#!/bin/sh
# Set brightness via xbrightness when redshift status changes
# Set brightness values for each status.
# Range from 0 to 100 is valid
brightness_day="100"
brightness_transition="60"
brightness_night="20"
max=$(cat /sys/class/backlight/intel_backlight/max_brightness)
actual=$(cat /sys/class/backlight/intel_backlight/actual_brightness)
case $1 in
period-changed)
case $3 in
night)
for (( c=$actual; c > $((( $brightness_night * $max / 100))); c-=1 ))
do
echo $c > /sys/class/backlight/intel_backlight/brightness
sleep .2
done
;;
transition)
old="$2"
if [[ "$old" == "none" ]]
then
if [[ $actual -lt $(( $brightness_transition * $max / 100 )) ]]
then
old="night"
else
old="daytime"
fi
fi
case $old in
night)
for (( c=$actual; c < $((( $brightness_transition * $max / 100))); c+=1 ))
do
echo $c > /sys/class/backlight/intel_backlight/brightness
sleep .2
done
;;
daytime)
for (( c=$actual; c > $((( $brightness_transition * $max / 100))); c-=1 ))
do
echo $c > /sys/class/backlight/intel_backlight/brightness
sleep .2
done
;;
esac
;;
daytime)
for (( c=$actual; c < $((( $brightness_day * $max / 100))); c+=1 ))
do
echo $c > /sys/class/backlight/intel_backlight/brightness
sleep .2
done
echo $max > /sys/class/backlight/intel_backlight/brightness
;;
esac
;;
esac