distribution/packages/jelos/sources/autostart/common/006-brightness

#!/bin/bash
# SPDX-License-Identifier: Apache-2.0
# Copyright (C) 2021-present Fewtarius (https://github.com/fewtarius)

. /etc/profile

### Variables may need to be device specific here.
BRIGHTNESS=$(get_setting system.brightness)
if [[ ! "${BRIGHTNESS}" =~ [0-9] ]]
then
  BRIGHTNESS=${DEVICE_BRIGHTNESS}
fi

# Ensure user doesn't get "locked out" with super low brightness
if [[ "${BRIGHTNESS}" -lt "3" ]]
then
  BRIGHTNESS=3
fi
BRIGHTNESS=$(printf "%.0f" ${BRIGHTNESS})
if [ "$(cat /sys/class/backlight/backlight/max_brightness)" = 255 ]
then
  printf "%.0f" $(echo "${BRIGHTNESS} * 2.56" | bc) > /sys/class/backlight/backlight/brightness
else
  printf "%.0f" $(echo "${BRIGHTNESS}") > /sys/class/backlight/backlight/brightness
fi
set_setting system.brightness ${BRIGHTNESS}