Blur Wallpaper on SwayWM using `oguri`

blur.sh

#!/bin/bash

# <Constants>
cache_dir="$HOME/.cache/wallblur"
display_resolution=$(swaymsg -pt get_outputs | grep Current | awk '{print $3}')
# </Constants>


# <Functions>
err() {
	echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $@" >&2
}

gen_blurred_seq () {
	notify-send "Building wallblur cache for "$base_filename""

	clean_cache

	wallpaper_resolution=$(identify -format "%wx%h" $wallpaper)

	err " Display resolution is: ""$display_resolution"""
	err " Wallpaper resolution is: $wallpaper_resolution"

	if [ "$wallpaper_resolution" != "$display_resolution" ]; then
		
		err "Scaling wallpaper to match resolution"
		convert $wallpaper -resize $display_resolution "$cache_dir"/"$filename"0."$extension"
		wallpaper="$cache_dir"/"$filename"0."$extension"
	fi

	for i in $(seq 0 1 5)
	do
		blurred_wallaper=""$cache_dir"/"$filename""$i"."$extension""
		convert -blur 0x$i $wallpaper $blurred_wallaper
		err " > Generating $(basename $blurred_wallaper)"
	done
    err "Generation done"
}


do_blur () {
	for i in 1 2 3 4 5
	do
		blurred_wallaper=""$cache_dir"/"$filename""$i"."$extension""
		ogurictl output eDP-1 --image "$blurred_wallaper" 
        err "$i"
	done
}

do_unblur () {
	for i in $(seq 5 -1 0)
	do
		blurred_wallaper=""$cache_dir"/"$filename""$i"."$extension""
		ogurictl output eDP-1 --image "$blurred_wallaper" 
	done
}

check_wallpaper_changed() {
	pywallpaper="$(grep wallpaper ~/.cache/wal/colors.sh | awk -F "=" '{print $2}')"
	temp_pre=${pywallpaper%\'} 
	temp_post="${temp_pre#\'}" 

	pywallpaper=${temp_post##*/}

	if [ "$pywallpaper" != "$base_filename" ]
	then
		err " Wallpaper changed. Going to update cache"

		wallpaper="$temp_post"
		base_filename=${wallpaper##*/}
		extension="${base_filename##*.}"
		filename="${base_filename%.*}"

		gen_blurred_seq

		prev_state="reset"
	fi
}

clean_cache() {
	if [  "$(ls -A "$cache_dir")" ]; then
		err " * Cleaning existing cache"
		rm -r "$cache_dir"/*
	fi
}
# </Functions>


# Get the current wallpaper location from pywal cache
wallpaper="$1"
temp_pre=${wallpaper%\'} 
wallpaper="${temp_pre#\'}" 
err "Curr wallpaper $wallpaper"

base_filename=${wallpaper##*/}
extension="${base_filename##*.}"
filename="${base_filename%.*}"

err $base_filename
err $extension
err $filename

err $cache_dir

# Create a cache directory if it doesn't exist
if [ ! -d "$cache_dir" ]; then
	err "* Creating cache directory"
	mkdir -p "$cache_dir"
fi

blur_cache=""$cache_dir"/"$filename"0."$extension""

# Generate cached images if no cached images are found
if [ ! -f "$blur_cache" ]
then
	gen_blurred_seq
fi

prev_state="reset"

while :; do

	#check_wallpaper_changed

	#current_workspace="$(xprop -root _NET_CURRENT_DESKTOP | awk '{print $3}')"
	#err $current_workspace

		num_windows="$( swaymsg -t get_tree | jq '[.nodes[] | .nodes[] | select(.. | .focused?) | .. | select(.app_id? or .window_properties?)] | length')"
		err Number of Windows: $num_windows

		# If there are active windows
		if [ "$num_windows" -gt 0 ]; then
			if [ "$prev_state" != "blurred" ]; then
				err " ! Blurring"
				do_blur
			fi
			prev_state="blurred"
		    else # If no windows, unblur
                err "shit"
		    	if [ "$prev_state" != "unblurred" ]; then
		    		err " ! Un-blurring"
		    		do_unblur
		    	fi
		    	prev_state="unblurred"
		fi
        sleep 1
done