Resolution Value Generator

#/bin/bash

WIDTH=1920
HEIGHT=1080
HIRES=0

read -e -p "Please set width px of screen resolution : " WIDTH
read -e -p "Please set height px of screen resolution : " HEIGHT
read -e -p "Do you want to use HiDPI (@2x) ? (y/n) " HIRES

if [ "$HIRES" == "Y" -o "$HIRES" == "y" -o "$HIRES" == "YES" -o "$HIRES" == "yes" ]; then
	HIRES=2
else
  HIRES=1
fi
echo "\nScreen resolution is set to $(($WIDTH*$HIRES)) x $(($HEIGHT*$HIRES))\n"
WIDTH_HEX=$(echo "obase=16; $(($WIDTH*$HIRES))" | bc)
HEIGHT_HEX=$(echo "obase=16; $(($HEIGHT*$HIRES))" | bc)

while [[ ${#WIDTH_HEX} -lt 8 ]]; do
  WIDTH_HEX="0"$WIDTH_HEX
done
while [[ ${#HEIGHT_HEX} -lt 8 ]]; do
  HEIGHT_HEX="0"$HEIGHT_HEX
done

FULL_HEX=$WIDTH_HEX$HEIGHT_HEX"0000000100200000"
echo "Hex value is : "$FULL_HEX

BASE64STRING=$(echo $FULL_HEX | xxd -r -p | base64)
echo "Please set this value in your plist : "$BASE64STRING"\n\n"