flutter canvas draw image
import 'dart:async';
import 'dart:typed_data';
import 'dart:ui' as UI;
import 'package:flutter/services.dart';
Future<UI.Image> loadUiImage(String imageAssetPath) async {
final ByteData data = await rootBundle.load(imageAssetPath);
final Completer<UI.Image> completer = Completer();
UI.decodeImageFromList(Uint8List.view(data.buffer), (UI.Image img) {
return completer.complete(img);
});
return completer.future;
}