#! /bin/sh

function pick_wallpaper
{
     WALLPAPER_BASE="default-"
     X=`LC_ALL=C xdpyinfo|grep dimensions:|head -n 1|cut -dx -f1|egrep -o '[0-9]+'`
     Y=`LC_ALL=C xdpyinfo|grep dimensions:|head -n 1|cut -dx -f2|egrep -o '[0-9]+'`

     if [ $(($X*11/$Y)) -gt 15 ]; then
        WALLPAPER="1920x1200.jpg"
     else
        WALLPAPER="1600x1200.jpg"
     fi
}

pick_wallpaper
echo /usr/share/wallpapers/$WALLPAPER_BASE$WALLPAPER