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dotfiles/scripts/dpi

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#!/bin/bash
set -eu
# Based on https://github.com/vincentbernat/awesome-configuration/blob/master/bin/xsettingsd-setup
CONF_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
BLUR_STRENGTH=10
CORNER_RADIUS=9
CURSOR_SIZE=16
xrdbget() {
set -o pipefail
xrdb -query | grep -i -m1 "$1" | sed 's/^.*:\s//g' || echo "$2"
}
xsetting_bool() {
case "$1" in
true) echo 1;;
false) echo 0;;
default) echo -1;;
*) echo -1;;
esac
}
if [ -z "$1" ] || [ "$1" -gt 200 ] || [ "$1" -lt 96 ]; then
>&2 printf "Usage\n\t%s: value\n\n value\t Value must be within 96-200 inclusive\n" "$(basename "$0")"
exit 1
fi
dpi=$1
scale=$(( dpi/96 ))
cursor=$(( (dpi*CURSOR_SIZE)/96 ))
# Update picom scale
sed -i -e "s/strength =.*$/strength = $(( (dpi*BLUR_STRENGTH)/96 ));/" \
-e "s/corner-radius =.*$/corner-radius = $(( (dpi*CORNER_RADIUS)/96 ));/" \
"$CONF_DIR/picom/picom.conf" &
# Build xsettingsd.conf
mkdir -p "$CONF_DIR/xsettingsd"
{
cat "$CONF_DIR/xsettingsd.local" 2>/dev/null || :
echo "Xcursor/size $cursor"
echo "Gtk/CursorThemeSize $cursor"
echo "Gtk/CursorThemeName \"$(xrdbget Xcursor.theme Adwaita)\""
echo "Xft/HintStyle \"$(xrdbget Xft.hintstyle hintfull)\""
echo "Xft/Hinting $(xsetting_bool "$(xrdbget Xft.hinting default)")"
echo "Xft/RGBA \"$(xrdbget Xft.rgba rgb)\""
echo "Xft/DPI $(( dpi*1024 ))"
echo "Gdk/WindowScalingFactor $scale"
echo "Gdk/UnscaledDPI $(( dpi*1024/scale ))"
} > "$CONF_DIR/xsettingsd/xsettingsd.conf"
xrdb -merge <<EOF &
Xft.dpi: $dpi
Xcursor.size: $cursor
EOF
xrandr --dpi "$dpi" &
systemctl --user try-reload-or-restart xsettingsd &
wait
systemctl --user try-reload-or-restart \
i3 \
polybar@i3bar &
systemctl --user try-restart \
dunst &
wait