rust-objc VS tigr

If you find dealing with the Obj-C bindings a bit daunting (I would), I'd recommend you use the objc crate. That will like you dive into the details of creating and updating Mac windows without having to figure out how to call Objective C from Rust.

There is https://github.com/SSheldon/rust-objc which is abandoned.

On macOS, per-window capture is actually exceedingly easy and officially supported by Apple, either including window shadows or not. I'm not aware of any crate for doing it cross-platform, but the way to do it on macOS is documented all over the Internet and the bindings you need are in the objc and core-graphics crates.

That looks like Objective C, not C. You can call Objective C methods from Rust via the objc crate.

TIGR

I think Tigr is probably the easiest plug-and-play solution. But if I don't need moving or interactive graphics, I usually just output SVG images (no library needed).

reminds me of TIGR, but simpler (but also without hardware acceleration/shaders, but also with sound)

Delighful, works at first try and the code looks well organized.

    git clone https://github.com/erkkah/tigr.git

In addition to the other options, you can look at small windowing libraries in other languages. For example TIGR has pretty straightforward Mac code using pure C (you'll need to have some understanding of the ObjC object model and the way it's exposed to C though).

I found TIGR to be the most pain-free way to just get graphics on the screen. It includes basic shape and font rendering.

I've found that the quickest and simplest solution to render graphics is Tigr.