Flutter

[lattice0]

I've been designing a Rust library for usage with Flutter. I see that you're doing Kotlin/Java <-> Rust here, but you mention Flutter.

Is there a plan to make a template for Flutter? Because there are 2 methods to consider: FFI vs Plugin call. Since plugin calls are very slow, FFI should be prefered, but what to do when Rust needs JNI objects? You can't pass them through Flutter's FFI

[ivnsch]

There are other repos with Flutter templates (which you probably have found by now). I don't see a need to make another one.

Just to clarify, why would Rust need JNI objects when using (C based) FFI? As far I understand, with Flutter you use C FFI for everything, so you don't have to touch JNI at all.

Sorry for the late reply, for some reason I was not subscribed to all the notifications and didn't see this.

[lattice0]

There are other repos with Flutter templates (which you probably have found by now). I don't see a need to make another one.

Just to clarify, why would Rust need JNI objects when using (C based) FFI? As far I understand, with Flutter you use C FFI for everything, so you don't have to touch JNI at all.

Sorry for the late reply, for some reason I was not subscribed to all the notifications and didn't see this.

Sometimes you need to call C code through plugin calls through JNI. For example, getting a C pointer to an opengl renderer so I can pass to the Rust library via FFI

[ivnsch]

I'd solve this kind of situation at library level, i.e. the native (Android in this case) library used in the plugin would have a dedicated Rust binary with the JNI bindings. It would be invisible at plugin/Flutter level.