From 43a656ee96c37b3d16e5a605ace2904ee4b4726f Mon Sep 17 00:00:00 2001
From: Joe Groocock <me@frebib.net>
Date: Tue, 20 Nov 2018 15:06:09 +0000
Subject: [PATCH] scripts/dpi: add DPI live change script

---
 scripts/dpi | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100755 scripts/dpi

diff --git a/scripts/dpi b/scripts/dpi
new file mode 100755
index 0000000..1f4700d
--- /dev/null
+++ b/scripts/dpi
@@ -0,0 +1,30 @@
+#!/bin/sh
+set -e
+
+# Based on https://github.com/vincentbernat/awesome-configuration/blob/master/bin/xsettingsd-setup
+
+dpi=$1
+
+if [ -z "$1" ]; then
+    >&2 printf "Usage\n\t%s: <dpi>" "$(basename "$0")"
+    exit 1
+fi
+
+CONF_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/xsettingsd"
+
+# Build xsettingsd.local
+{
+    cat $CONF_DIR/xsettingsd.conf 2>/dev/null || true
+    echo Xft/DPI $(( $dpi*1024 ))
+    echo Gdk/WindowScalingFactor $(( $dpi/96 ))
+    echo Gdk/UnscaledDPI $(( $dpi*1024/($dpi/96) ))
+} > $CONF_DIR/xsettingsd.local
+
+pid=$(xprop -name xsettingsd _NET_WM_PID 2> /dev/null | awk '{print $NF}')
+if [ -z "$pid" ]; then
+    xsettingsd -c $CONF_DIR/xsettingsd.local &
+else
+    kill -HUP $pid
+fi
+
+echo Xft.dpi: $dpi | xrdb -merge