Opt-in blur for transparent windows

[zopieux]

Hi,

tl;dr does anyone know how to disable background blurring for everything except some list?

The only use I have for background-blurred semi-transparent windows is my terminal emulator. I am therefore trying to configure picom to do the following:

• detect transparent windows and apply opacity; this works fine today
• do not background-blur anything
• in the specific case of a class_g = 'konsole' or name = 'konsole' (something like that), apply background-blurring

picom config has a blur-background-exclude directive, but as the name implies, it's a blocklist/opt-out. I would like it to be opt-in/allowlist instead, with just my terminal emulator selector(s) in that allowlist.

Does anyone have a tip? Thanks a lot!

[vincentbernat]

blur-background-exclude = [
  "class_g != 'konsole' &&
   window_type != 'tooltip' &&
   window_type != 'menu' &&
   window_type != 'popup_menu' &&
   window_type != 'dropdown_menu' &&
   window_type != 'splash' &&
   window_type != 'combo'
];

(I have added more opt-in to show how to extend)

[Flashwalker]

blur-background-exclude = [
  "class_g != 'konsole' &&
  ...
   window_type != 'combo'" # <- HERE
];

(I have added more opt-in to show how to extend)

closing double-quote is missing in you listing

[zopieux]

Well I feel dumb now, did not realize this had more generic boolean logic capabilities. If I failed to find that in the docs, sorry. Otherwise this probably wouldn't hurt to add something about that "DSL". Thanks a lot!