Colin's git trees - cmccabe-bin/blob - hdmi-dimmer.sh

   1 #!/usr/bin/env bash
   2
   3 usage() {
   4     cat << EOF
   5 hdmi-dimmer.sh: dims an HDMI screen using xrandr.
   6
   7 usage: hdmi-dimmer.sh [brightness]
   8     where brightness is a float from 0.0 to 1.0
   9
  10 example: hdmi-dimmer.sh 0.5
  11 EOF
  12     exit 0
  13 }
  14
  15 [ $# -lt 1 ] && usage
  16 BRIGHTNESS="${1}"
  17 [ "x$BRIGHTNESS" == "x-h" ] && usage
  18 [ "x$BRIGHTNESS" == "x--help" ] && usage
  19
  20 set -x
  21 set -e
  22 xrandr --output HDMI1 --brightness "${BRIGHTNESS}"