🎉 opencv_dart supports asynchronous now! 🎉

[rainyl]

I am very excited to announce that with the help of @abdelaziz-mahdy , opencv_dart supports asynchronous APIs now!

It's a breaking change and many APIs have been changed, Every API that supports asynchronous is ended by Async, e.g., cv.imread -> cv.imreadAsync.

It's a prerelease, available at https://pub.dev/packages/opencv_dart/versions/1.1.0-dev.1

update your pubspec.yaml to:

...
dependencies:
  ...
  opencv_dart: ^1.1.0-dev.1
  ...
...

to use it. It's experimental, open an issue if you find any bugs, have fun~

Some notes:

• Async APIs do NOT support output patameters, e.g., Mat cvtColor(Mat src, int code, {Mat? dst}) -> Future<Mat> cvtColorAsync(Mat src, int code).
• Use asynchronous API for heavy tasks that may block main/UI thread, use synchronous getters/setters.
• The implementation of Async classes is based on extensions, so you can use both sync and async methods for classes.
• GAPI is not fully supported yet, do not use.
• Get more examples in example and test