Allow windows to have a fully transparent background

[itsanonmelody]

I'm not sure if this is already in Niri or has been suggested before since I couldn't find any relevant issue or discussion. I'm interested in having this feature to be able to use desktop companions like On-Together. The way Niri currently behaves is rendering a black background on blank areas that is expected to be transparent.

Here's a screenshot of how things look like right now:

I don't know if this is the WM's responsibility or Xwayland Satellite's. Let me know what you all think.

Related discussions:

• Add clickthrough parameter to windows to allow for floating windows to behave like true HUDs / overlays #2743

[Sempyos]

We do have opacity as seen here
https://yalter.github.io/niri/Configuration%3A-Window-Rules.html#opacity

But if that's xwayland I do not think we can do much here

[Sempyos]

If it's xwayland, we can't really do that

[itsanonmelody]

Oh :C. Where should I suggest this instead?

[Sempyos]

No clue, in general the game should uh just move to Wayland

[itsanonmelody]

Looks like I can launch the game using Wayland through Proton GE. The problem still persists though.

[Sempyos]

That will still not fix it as it's still probably rendered on one big window instead of a layer