New mode generator for xrandr.

xrandr.sh

#!/bin/bash

# MIT License
#
# Copyright (c) 2021 Vladislav Kulbatski
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

# Use user resolution if provided
if [[ -z "$@" ]]; then
  arg="1920 1200 60"
else
  arg="$@"
fi

# Arguments validation
if [[ $(($(echo $arg | grep -o "\s" | wc --chars) / 2 )) -ne 2 ]]; then
  echo "Invalid Parameters. You need to specify parameters in the format \"width height refreshRate\""
  echo "For example setResolution \"1920 1080 60\""
  exit
fi

# Define xrandr variables
modename=$(echo $arg | sed 's/\s/_/g')
display=$(xrandr | grep -Po '.+(?=\sconnected)')

# Create new mode
if [[ "$(xrandr|grep $modename)" = "" ]]; then
  xrandr --newmode $modename $(gtf $(echo $arg) | grep -oP '(?<="\s\s).+') &&
  xrandr --addmode $display $modename
fi

# Activate the mode
xrandr --output $display --mode $modename 2>/dev/null

# Confirm 0 exit
if [[ $? -eq 0 ]]; then
  echo "Display changed successfully to $arg"
fi