support for Scrolling/Parallax Background (like on Android)

[NOTtheMessiah]

I recently installed Niri and like it so far, however, before I set up waybar, I had difficulty remembering which workspace I was in (and still do without looking at Waybar). I also had the simultaneous problem of picking an image as a backdrop, when the image I liked was too big or had different proportions than my screen, I was faced with the decision of what to do, to crop it at some point, or convert it to an animation. I recall that on my phone, as I move to different sections of the home screen, the background moves with it, giving a subtle sense of location within a digital workspace, and also allowing me to set overly-wide images as backgrounds without cropping or scaling them.

Having a scrolling background is not something that can be done passively without some information being sent from the compositor to the background daemon, so I'm thinking to have something like this would need to be feature supported by Niri, where it would send to the daemon the relative x/y focus location (such that x,y are between 0 and 1) within all connected workspaces. I think once this is implemented, dynamic background daemons can use this information for use with layered/parallax wallpapers, the same way waybar is informed which workspace one is in.

[YaLTeR]

Hey! I've had this idea for a while, but the main problem is that the scrolling space constantly grows and shrinks as you open, close and resize windows. So I think this could only work with a perfectly looping long wallpaper.