zontag/flutter_ffi_demo

a demo project of flutter native interactions through dart:ffi

Readme

This is example project of how to use opencv with flutter::ffi utilities based on the tutorial in the blog post:

"Implementing a Flutter plugin with native OpenCV support via dart::ffi – Part 1"

"Implementing a Flutter plugin with native OpenCV support via dart::ffi – Part 2"

Preparation

Install the latest cmake (minimum version is 3.21.1)

brew install cmake
brew unlink cmake && brew link cmake

Add additional global params to you rc file

export ANDROID_HOME=/Users/$USER/Library/Android/sdk
export ANDROID_NDK_HOME=$ANDROID_HOME/ndk-bundle
export ANDROID_NDK=$ANDROID_NDK_HOME
export NDK=$ANDROID_HOME/ndk/23.0.7599858

Here 23.0.7599858 could be any version > 23.0.75..

Don't forget to switch you console to the new source!!

Prebuild opencv for both platforms

This will take some big amount of time cause we need to build opencv for ios and android for ALL architectures

cd src
sh prebuild.sh

For ios also need to call build.sh from the ios folder

This script will prepare ios framework file that will contain all c++ code. It also should be applied each time you change c++ code and need to check it or iphone

cd src/ios
sh build.sh