Having written a few JNI libraries in Rust (jni-rs specifically) myself, I'd argue that it catches & prevents a lot of potential mistakes when using JNI, especially regarding error handling/refs/types. I would pick using jni-rs any day over raw JNI. The simplicity of the C JNI API is also the cause of much pain when your project expands in scope.

I'm not too familiar with the xcode dev environment; could Theos be used instead of the huge xcode bundle? As far as I know, it provides the compilers and frameworks directly.

I’m also one of the maintainers of Theos :)

When you use Theos outside macOS, you have to install a toolchain and SDK. The toolchain is built from LLVM + cctools, and is in fact very similar to the one we use in xtool (I maintain both.) The SDK is hosted on GitHub and I could’ve decided to use this instead of getting the user to supply a copy of Xcode, but the copyright status is iffy; there’s an argument to be made in light of Google v. Oracle but I didn’t want to take any chances.

That makes sense, thanks!

I'm excited for the possibility of this being integrated with multiplatform frameworks like KMP. I wouldn't need to boot up my hackintosh anymore :)

Indeed, the osu! community wrote their own drivers for Wacom and many other drawing tablets: https://github.com/OpenTabletDriver/OpenTabletDriver

They're much more configurable than Wacoms proprietary drivers and also telemetry-free. It's so widely used that they've even been directly integrated into the new osu! lazer client.