Hyprland - Pixelated your screen when locking

Dependencies:

• grim: to take screenshot.
• ImageMagick: to edit image.

• Create script ~/.local/bin/lock_screen.sh with content:

  #!/bin/bash
  
  # Take screenshot
  grim /tmp/screen.png
  
  # Pixelate it
  convert /tmp/screen.png -scale 10% -scale 1000% /tmp/screen.png
  
  # Optional: Add a overlay image at center
  # convert /tmp/screen.png <your_image> -gravity center -composite -matte /tmp/screen.png
  
  # Lock screen
  hyprlock

• Add execute permission:

  chmod +x ~/.local/bin/lock_screen.sh

• Edit ~/.config/hypr/hyprlock.conf to use /tmp/screen.png for background:

  background {
      path = /tmp/screen.png
  }

• Edit ~/.config/hypr/hyprland.conf to use lock_screen.sh when press Window+L:

  # Lock screen when press $mainMod + L
  bind = $mainMod, L, exec, ~/.local/bin/lock_screen.sh

• Edit ~/.config/hypr/hypridle.conf to use lock_screen.sh for lock command:

  general {
      lock_cmd = pidof hyprlock | ~/.local/bin/lock_screen.sh
      before_sleep_cmd = loginctl lock-session
      after_sleep_cmd = hyprctl dispatch dpms on
  }
  
  listener {
      timeout = 300
      on-timeout = loginctl lock-session
  }
  
  listener {
      timeout = 360
      on-timeout = hyprctl dispatch dpms off
      on-resume = hyprctl dispatch dpms on
  }