#!/bin/sh

# Don't try to guess DPI. For a laptop, we don't want the same DPI as
# for an external screen. Just hardcode stuff...
case $(hostname),$(autorandr --current --skip-options gamma) in
    zoro,default)       dpi=144 ;;
    guybrush,default)   dpi=144 ;;
    neo,*)              dpi=192 ;;
    *,*)                dpi=96 ;;
esac

# Get xsettingsd PID
pid=$(xprop -name xsettingsd _NET_WM_PID 2> /dev/null | awk '{print $NF}')

change() {
    # Build xsettingsd.local
    {
        cat  ~/.config/awesome/xsettingsd
        echo Xft/DPI $(( $1*1024 ))
        echo Xft/RGBA \"$( [ $1 -gt 144 ] && echo none || echo rgb )\"
        echo Gdk/WindowScalingFactor $(( $1/96 ))
        echo Gdk/UnscaledDPI $(( $1*1024/($1/96) ))
    } > ~/.xsettingsd

    # Signal xsettingsd
    if [ x"$pid" = x ]; then
        xsettingsd -c ~/.xsettingsd &
    else
        kill -HUP $pid
    fi

    # Also use xrdb for very old stuff (you know, LibreOffice)
    echo Xft.dpi: $dpi | xrdb -merge
}

change $dpi