no, it's not possible to blur the foreground of inactive windows now

you can try to achieve something like this by using inversion in opacity rules and blur exclusions to give all inactive windows opacity and blur, idk how it'll look tho

@rajansaini691 I would be happy to review such PR. If you are going to do it, please implement it for the experimental backends. I think it should be pretty easily achievable.

@mighty9245 Thanks. I'll probably just directly implement it, then.

@yshui Awesome! Which branch should I use? Is it the next branch? Also, I'm trying to think of a good function name; how does blur_fg sound? Should the current blur be left as-is, or should it be refactored to blur_bg?

@rajansaini691 next is the current development head.

I think it should be possible to reuse most of the current implementation for blurring as is and just change the sampling source. No need to re-implement the actual blurring magic. 😉
Actual window rendering in the experimental backends is done in render_all_new() in backend.c. You can find the different compositing steps there as a starting point.