#!/bin/sh

# set system dpi to the minimal dpi among all connected monitors


xrandr | awk '
BEGIN {
    MIN_DPI=99999999
}
$2 == "connected" {
    if (match($0, / ([0-9]+)x([0-9]+)\+([0-9]+)\+([0-9]+) /, m1) &&
        match($0, / ([0-9]+)mm x ([0-9]+)mm$/, m2)) {
        DPI=m1[1]*25.4/m2[1]
        if (DPI < MIN_DPI) MIN_DPI=DPI
    }
}
END {
    printf "Xft.dpi: %i", MIN_DPI+0.5
}
' | xrdb -merge

nitrogen --restore