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#!/bin/bash
#
# Wrapper around xrandr to set screen resolution.
#
# Parameters
BASENAME="`basename $0`"
RESOLUTION="$1"
INTERFACE="$2"
#XRES="$1"
#YRES="$2"
#INTERFACE="$3"
# Check
#if [ -z "$Y" ]; then
if [ -z "$RESOLUTION" ]; then
#echo "usage: $BASENAME <x-res> <y-res> <interface>"
echo "usage: $BASENAME <x-res>x<y-res> <interface>"
echo "example:"
echo ""
echo " $BASENAME HDMI-2 1680x1050"
echo ""
echo "for simpler usage, try xrandr directly, like:"
echo ""
echo " xrandr --output HDMI-2 --mode 1680x1050"
echo ""
echo "Available screens and resolutions"
echo "---------------------------------"
echo ""
xrandr
exit 1
elif ! which cvt &> /dev/null; then
echo "please install cvt from xserver-xorg-core"
exit 1
elif ! which xrandr &> /dev/null; then
echo "please install xrandr from x11-xserver-utils"
exit 1
fi
# Parse resolution
XRES="`echo $RESOLUTION | cut -d 'x' -f 1`"
YRES="`echo $RESOLUTION | cut -d 'x' -f 2`"
# Check resolution
if [ -z "$XRES" ]; then
echo "$BASENAME: invalid value for x-res"
exit 1
elif [ -z "$YRES" ]; then
echo "$BASENAME: invalid value for y-res"
exit 1
fi
# Get modeline and interface
MODELINE="`cvt $XRES $YRES | grep -v '^#' | sed -e 's/^Modeline //'`"
NAME="`echo $MODELINE | cut -d ' ' -f 1 | sed -e 's/"//g'`"
# Fallback to the first connected interface found
if [ -z "$INTERFACE" ]; then
INTERFACE="`xrandr | grep " connected" | cut -d ' ' -f 1 | head -1`"
fi
# Apply
xrandr --newmode $MODELINE &> /dev/null
xrandr --addmode $INTERFACE $NAME
xrandr --output $INTERFACE --mode $NAME
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