dotfiles/gui/autorandr/postswitch

#!/bin/sh

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


xrandr | awk '
$2 == "connected" && $3 == "primary" {
    if (match($0, / ([0-9]+)x([0-9]+)\+([0-9]+)\+([0-9]+) (left|right)?/, m1) &&
        match($0, / ([0-9]+)mm x ([0-9]+)mm$/, m2)) {
        DPI=m1[1]*25.4/m2[m1[5]?2:1]*0.8
        printf "Xft.dpi: %i", DPI
    }
}
' | xrdb -merge

nitrogen --restore