init

README.md

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+```
+ ┏━┓┳  o┏┓┓┏━┓┳ ┳┳  ┏━┓┏━┓┳┏ 
+ ┃ ┳┃  ┃ ┃ ┃  ┃━┫┃  ┃ ┃┃  ┣┻┓
+ ┇━┛┇━┛┇ ┇ ┗━┛┇ ┻┇━┛┛━┛┗━┛┇ ┛
+
+```
+
+glitchlock: a glitch art themed randomized lockscreen. powered by i3lock-color.
+
+![glitchlock preview](https://raw.githubusercontent.com/xero/glitchlock/master/preview.gif)
+
+(note, the lock screen is **NOT** animated. this gif is just a few examples of it's random output)
+
+## table of contents
+* [about](#about)
+* [how it works](#how-it-works)
+* [security](#security)
+* [requirements](#requirements)
+* [customize](#customize)
+* [more](#more)
+
+### about
+
+i do [glitch art](https://x-ero.tumblr.com) for fun. i was messing around w/ one of my shell scripts and though: this would make a cool lockscreen! after a bit of research and refactoring here we are.
+
+### how it works
+
+the application takes a screenshot. then datamoshes it. optionally overlays an image (one for each display) then uses that image as the background for the lockscreen.
+
+### security
+
+this lockscreen has the potential for information leakage, since it uses a screenshot of your active screen. it made this for fun and personal use, please take care and weigh your opsec and threat models before deciding to use this. 
+
+a workaround i like is setting up your screen very nicely w/o any secret info in it and taking a screenshot. then replace line #9 in the script (`scrot /tmp/lock.png`) with a command to move your pre-setup screenshot into place (e.g. `mv ~/lib/img/lock.png /tmp/lock.png`) then let the script randomly glitch that image out everytime.
+
+### requirements
+
+* i3lock-color
+	* the "ricing" fork of the lockscreen application
+	* https://github.com/PandorasFox/i3lock-color
+* scrot
+	* the premiere nix screen shot tool
+	* https://github.com/dreamer/scrot
+* imagemagick
+	* image manipulation toolkit
+	* https://github.com/ImageMagick/ImageMagick
+
+if you're using arch they can all be installed from the community and aur repos:
+
+`yaourt -S i3lock-color-git scrot imagemagick`
+
+### customize
+
+if called alone, the script will take a screenshot and glitch it. but you can optionally pass an environment variable named  `GLITCHICON` to the app and it will center that image on each display and overlay it on the glitched image.
+
+an example of calling the script on `MOD4+ESC` using [sxhkd](https://github.com/baskerville/sxhkd)
+
+```
+# lockscreen
+mod4 + Escape
+ GLITCHICON=/home/x0/src/glitchlock/stop.png /home/x0/bin/glitchlock
+```
+
+### more
+
+* https://0w.nz
+* https://xero.nu
+* https://nixers.net
+* https://git.io/.files
+* https://reddit.com/r/unixporn

glitchlock

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+#!/bin/bash
+# ┏━┓┳  o┏┓┓┏━┓┳ ┳┳  ┏━┓┏━┓┳┏ 
+# ┃ ┳┃  ┃ ┃ ┃  ┃━┫┃  ┃ ┃┃  ┣┻┓
+# ┇━┛┇━┛┇ ┇ ┗━┛┇ ┻┇━┛┛━┛┗━┛┇ ┛
+#
+# author: xero <x@xero.nu> http://xero.nu
+# requires: i3lock-color, imagemagick, scrot
+
+scrot /tmp/lock.png
+convert /tmp/lock.png /tmp/lock.jpg
+file=/tmp/lock.jpg
+
+function datamosh() {
+	fileSize=$(wc -c < "$file")
+	headerSize=1000
+	skip=$(shuf -i "$headerSize"-"$fileSize" -n 1)
+	count=$(shuf -i 1-10 -n 1)
+	for i in $(seq 1 $count);do byteStr=$byteStr'\x'$(shuf -i 0-255 -n 1); done;   
+	printf $byteStr | dd of="$file" bs=1 seek=$skip count=$count conv=notrunc >/dev/null 2>&1
+}
+
+steps=$(shuf -i 40-70 -n 1)
+for i in $(seq 1 $steps);do datamosh "$file"; done
+
+GLITCHICON=${GLITCHICON:=""}
+PARAM=(--bar-indicator --bar-position h --bar-direction 1 --redraw-thread -t "" \
+	--bar-step 50 --bar-width 250 --bar-base-width 50 --bar-max-height 100 --bar-periodic-step 50 \
+	--bar-color 00000077 --keyhlcolor 00666666 --ringvercolor cc87875f --wrongcolor ffff0000 \
+	--veriftext="" --wrongtext="" --noinputtext="" )
+
+LOCK=()
+while read LINE
+do
+	if [[ "$LINE" =~ ([0-9]+)x([0-9]+)\+([0-9]+)\+([0-9]+) ]]; then
+		W=${BASH_REMATCH[1]}
+		H=${BASH_REMATCH[2]}
+		Xoff=${BASH_REMATCH[3]}
+		Yoff=${BASH_REMATCH[4]}
+		if [ ! -z "$GLITCHICON" ]; then
+			IW=`identify -ping -format '%w' $GLITCHICON`
+			IH=`identify -ping -format '%h' $GLITCHICON`
+			MIDXi=$(($W / 2 + $Xoff - $IW / 2))
+			MIDYi=$(($H / 2 + $Yoff - $IH / 2))
+			LOCK+=($GLITCHICON -geometry +$MIDXi+$MIDYi -composite)
+		fi
+	fi
+done <<<"$(xrandr)"
+
+convert /tmp/lock.jpg /tmp/lock.png >/dev/null 2>&1
+rm /tmp/lock.jpg
+file=/tmp/lock.png
+
+convert "$file" "${LOCK[@]}" "$file"
+
+i3lock -n "${PARAM[@]}" -i "$file" > /dev/null 2>&1