i3lock-multimonitor
This script can be used as an i3 window manager lock script on mutli-monitor setups. It is able to sense the screen resolutions and resizes a given image appropriately for the screens. Next, it applies a blur and dim effect, after which it will render a rectangular image on each screen for the OSD to be projected on.
The idea for this project was shamelessly copied from guimeira's i3lock-fancy-multimonitor.
It uses ImageMagick to resize the background image. You can replace this image to change background.
By using information from xrandr and basic math, this script supports multiple monitor setups, displaying the background image on all screens.
It caches the generated image for different screen sizes and xrandr output. So even though first lock command will take a second to finish, subsequent lock will be lighting fast. This delay may be circumvented by pre-caching images.
Installation
Make sure you have all the dependencies (example on Arch Linux):
$ sudo pacman -S imagemagick i3lock
Copy the lock script along with the images to some place on your system (e.g.: the i3 folder) and give it execution permission:
git clone https://github.com/shikherverma/i3lock-multimonitor.git
cp -r i3lock-multimonitor ~/.i3mm
chmod +x ~/.i3mm/i3lock-multimonitor/lock
Create a key binding on your i3 config file (in this example I'm using $mod+p):
echo "bindsym \$mod+p exec /home/$USER/.i3/i3lock-multimonitor/lock" >> ~/.i3/config
Now reload the i3 config file. By default, the key binding is $mod+Shift+c.
Usage
The script can be invoked in multiple ways.
Cache mode
This will update the image cache but not lock the screen. It may take a few seconds to complete.
$ lock -c /path/to/image.jpg
Lock mode
This will lock the screen. If a cached image already exists, the screen will be locked right away, otherwise an image will be generated and cached.
$ lock -l /path/to/image.jpg
It is always preferable to have the images pre-cached to make the locking as quick and seamless as possible. Also remember that different images are cached for single and multimode setups.