Updated for multihead systems

This update takes one separate screenshot per display connected, apply all the effects, merge the padlock image and stich them in order to have one padlock image per screen

.config/i3/lock.sh

@@ -1,13 +1,26 @@
 #!/bin/bash
+#!/bin/bash
 
 # Approximate timeout rate in milliseconds (checked every 5 seconds).
 timeout="10000"
 
-# Take a screenshot:
-scrot /tmp/screen.png
+# Take a screenshot of every screen available:
+xdpyinfo -ext XINERAMA | sed '/^  head #/!d;s///' |
+{
+  while IFS=' :x@,' read i w h x y; do
+    INDEX=$i
+    import -window root -crop ${w}x$h+$x+$y /tmp/head_$i.png
+  done
 
-# Add the lock to the swirled and blurred image:
-[[ -f ~/.config/i3/lock.png ]] && convert /tmp/screen.png -paint 1 -swirl 360  ~/.config/i3/lock.png -gravity center -composite -matte /tmp/screen.png
+# Add the lock to the swirled and blurred images:
+  for i in `seq 0 ${INDEX}`;
+    do
+      convert /tmp/head_${i}.png -paint 1 -swirl 360 ~/.config/i3/lock.png -gravity center -composite -matte /tmp/head_${i}.png;
+    done
+}
+
+#Combine all screen images into one big image
+convert +append /tmp/head_*.png /tmp/screen.png
 
 # Pause music (mocp and mpd):
 mocp -P