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@csivanich /lock.sh
Last active Jun 29, 2018

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i3 Blurred Lock Screen
#!/bin/bash
# i3lock blurred screen inspired by /u/patopop007 and the blog post
# http://plankenau.com/blog/post-10/gaussianlock
# Timings are on an Intel i7-2630QM @ 2.00GHz
# Dependencies:
# imagemagick
# i3lock
# scrot (optional but default)
IMAGE=/tmp/i3lock.png
SCREENSHOT="scrot $IMAGE" # 0.46s
# Alternate screenshot method with imagemagick. NOTE: it is much slower
# SCREENSHOT="import -window root $IMAGE" # 1.35s
# Here are some imagemagick blur types
# Uncomment one to use, if you have multiple, the last one will be used
# All options are here: http://www.imagemagick.org/Usage/blur/#blur_args
#BLURTYPE="0x5" # 7.52s
#BLURTYPE="0x2" # 4.39s
#BLURTYPE="5x2" # 3.80s
BLURTYPE="2x8" # 2.90s
#BLURTYPE="2x3" # 2.92s
# Get the screenshot, add the blur and lock the screen with it
$SCREENSHOT
convert $IMAGE -blur $BLURTYPE $IMAGE
i3lock -i $IMAGE
rm $IMAGE
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masoncodes Mar 21, 2016

this worked for me! 👍

this worked for me! 👍

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z3t0 Mar 22, 2016

how are the time measurements done?

z3t0 commented Mar 22, 2016

how are the time measurements done?

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masoncodes Mar 22, 2016

@z3t0 probably a stopwatch or something...

@z3t0 probably a stopwatch or something...

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bechampion Apr 29, 2016

I like it but it takes a bit of time to blur ...bit insecure

I like it but it takes a bit of time to blur ...bit insecure

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greenbagels Jul 22, 2016

You can use imagemagick's import command to screencap as well, reducing the number of required packages.

You can use imagemagick's import command to screencap as well, reducing the number of required packages.

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Chabam Mar 10, 2017

A quick suggestion to improve the time to render the blurred image, you could reduce the size of the screen cap before applying the blur:
convert $IMAGE -resize 50%
convert $IMAGE -blur $BLURTYPE $IMAGE
Then put back to 200% to get back to orginal size
convert $IMAGE -resize 200%

Chabam commented Mar 10, 2017

A quick suggestion to improve the time to render the blurred image, you could reduce the size of the screen cap before applying the blur:
convert $IMAGE -resize 50%
convert $IMAGE -blur $BLURTYPE $IMAGE
Then put back to 200% to get back to orginal size
convert $IMAGE -resize 200%

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ilthegan Sep 11, 2017

Thanks !!!
Inspired from this project, here a little boost i3lock++

Thanks !!!
Inspired from this project, here a little boost i3lock++

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darddan Feb 22, 2018

I know it's been some time since you published this gist. I used this method until today, but because I use an older computer it would take me 2-5 seconds to take the screenshot, add the effect and then run the i3lock. i3lock-blur flickers and doesnt work in my computer.
I've forked scrot and added a blur option and an option to add an icon here: darddan/scrot
Running scrot -B 5 -i icon.png output.png generates a blurred screenshot with an icon over it in about 300 milliseconds.

darddan commented Feb 22, 2018

I know it's been some time since you published this gist. I used this method until today, but because I use an older computer it would take me 2-5 seconds to take the screenshot, add the effect and then run the i3lock. i3lock-blur flickers and doesnt work in my computer.
I've forked scrot and added a blur option and an option to add an icon here: darddan/scrot
Running scrot -B 5 -i icon.png output.png generates a blurred screenshot with an icon over it in about 300 milliseconds.

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