#!/bin/sh
# Copyright (C) 2007,2008 Krzysztof Kozlowski
#   License: GNU General Public License version 2
#            http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# Ostatnia zmiana: 12.03.2008
#
# Turn on/off external VGA - RandR 1.2
#
#

# Settings:
XRANDR="xrandr"
VGA_OUTPUT="VGA"
LVDS_OUTPUT="LVDS"
TV_OUTPUT="TV"

usage () {
  echo "Usage:
  $(basename $0) [-h|-s] [mode options]
    -h                - print help
    -s                - print status
  Mode options:
    -v <on|off|mode>  - turn VGA output off, on (auto or exact mode)
    -l <on|off|mode>  - turn LVDS output off, on (auto or exact mode)
    -t <on|off|mode>  - turn TV output off, on (auto or exact mode)
    -f <NTSC|PAL>     - change TV output format to NTSC or PAL

You can obtain list of supported modes or TV formats with command:
  $(basename $0) -s"
}

if [ $# -lt 1 ]; then
  usage
  exit 127
fi

XRANDR_COMMAND=""
while getopts  "t:f:v:l:hs" flag
do
  case "$flag" in
    h ) usage && exit 0 ;;
    s ) $XRANDR --prop && exit 0 ;;
    v )
      if [ "$OPTARG" == "on" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --output $VGA_OUTPUT --auto"
      elif [ "$OPTARG" == "off" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --output $VGA_OUTPUT --off"
      else
        XRANDR_COMMAND="$XRANDR_COMMAND --output $VGA_OUTPUT --mode $OPTARG"
      fi
      ;;
    l )
      if [ "$OPTARG" == "on" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --output $LVDS_OUTPUT --auto"
      elif [ "$OPTARG" == "off" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --output $LVDS_OUTPUT --off"
      else
        XRANDR_COMMAND="$XRANDR_COMMAND --output $LVDS_OUTPUT --mode $OPTARG"
      fi
      ;;
    t )
      if [ "$OPTARG" == "on" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --output $TV_OUTPUT --auto"
      elif [ "$OPTARG" == "off" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --output $TV_OUTPUT --off"
      else
        XRANDR_COMMAND="$XRANDR_COMMAND --output $TV_OUTPUT --mode $OPTARG"
      fi
      ;;
    f )
      if [ "$OPTARG" == "NTSC" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --set TV_FORMAT NTSC-M"
      elif [ "$OPTARG" == "PAL" ]; then
        XRANDR_COMMAND="$XRANDR_COMMAND --set TV_FORMAT PAL"
      fi
      ;;
  esac
done

if [ "$XRANDR_COMMAND" != "" ]; then
  echo "Executing: $XRANDR $XRANDR_COMMAND ..."
  $XRANDR $XRANDR_COMMAND
  STATUS=$?
else
  usage
  STATUS=127
fi

exit $STATUS