Dart FFI Guide — Calling C/C++ Libraries from Flutter Dart FFI lets you call C/C++ libraries directly from Flutter. Useful for crypto, image processing, ML inference, or any CPU-heavy task where pure Dart is too slow. Basic Setup dependencies : ffi : ^2.1.0 Enter fullscreen mode Exit fullscreen mode import 'dart:ffi' ; import 'package:ffi/ffi.dart' ; // Define C function signature typedef AddNative = Int32 Function ( Int32 a , Int32 b ); typedef AddDart = int Function ( int a , int b ); // Load library final dylib = Platform . isAndroid ? DynamicLibrary . open ( 'libmylib.so' ) : Platform . isIOS ? DynamicLibrary . process () : DynamicLibrary . open ( 'mylib.dll' ); // Bind function final add = dylib .…