dotfiles/gui/autorandr/postswitch

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#!/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