#!/bin/bash

# xrandr2
#
# prints out the xrandr size number that is equal to or smaller than/closest to
# the specified (desired) X and Y screen resolution.
#
# example: xrandr -s $(xrandr2 1152 864)

set -eu

X=$1
Y=$2

xrandr | awk "
        /^[ \*][0-9]/ {
                if (\$2 <= $X && \$4 <= $Y) {
                        print \$1
                        exit
                }
        }
        " | tr -c -d '[0-9]'