meta: Add full variable DPI support

This *should* complete the process of adding full variable DPI support
to an X session. The X DPI is now set dynamically and changes on
resolution change, making this setup easy to deploy to both traditional
and HiDPI environments.

bspwm/.config/bspwm/bspwmrc

@@ -48,8 +48,12 @@ xset s off -dpms
 # Start compton
 compton -b
 
-# Start polybar
-~/.config/polybar/launch.sh main
+# Start polybar and other things based on DPI
+~/.config/xeventbind/on-resolution-change.sh
+
+if hash xeventbind 2>/dev/null; then
+  xeventbind resolution $HOME/.config/xeventbind/on-resolution-change.sh &
+fi
 
 # bspc rules
 bspc rule -a mpv            state=floating

xeventbind/.config/xeventbind/on-resolution-change.sh

@@ -5,6 +5,11 @@ HOST_WIDTH=$(bspc query -T -m | jq '.rectangle.width')
 
 CURSOR_THEME=${XCURSOR_THEME:-breeze_cursors}
 
+# If the DPI is not set, set it to 96 by default
+if [ -z "$(xrdb -query | grep dpi)" ]; then
+  X_DPI=96
+fi
+
 # Determine the DPI based on screen width
 if [ "$HOST_WIDTH" -eq "1920" ]; then
   X_DPI=96

xresources/.Xresources

@@ -1,9 +1,6 @@
 ! New Start: A modern Arch workflow built with an emphasis on functionality.
 ! Copyright (C) 2017-2018 Donovan Glover
 
-! Use 2x (192/96) scaling for 4k (Effectively 1920x1080)
-Xft.dpi: 192
-
 ! Make it easier to distinguish between letters (Required for dpi < 300)
 Xft.hinting: true