Isolate ImageCompressor

import 'dart:io';
import 'dart:isolate';

import 'dart:ui';

import 'package:image/image.dart';

class ImageCompressor{
  ImageCompressor();



  static Future<void> getCompressedImage(SendPort sendPort) async {
    ReceivePort receivePort = ReceivePort();

    sendPort.send(receivePort.sendPort);
    List msg = (await receivePort.first) as List;

    File fileImg = msg[0];
    SendPort replyPort = msg[1];

    Image image = decodeImage(await fileImg.readAsBytes());

    if (image.width > 800) {
      image = copyResize(image, width: 800);
    }

    replyPort.send(image);
  }


  static Future<Image> compressImage(File file) async {
    ReceivePort receivePort = ReceivePort();

    await Isolate.spawn(getCompressedImage, receivePort.sendPort);
    SendPort sendPort = await receivePort.first;

    ReceivePort receivePort2 = ReceivePort();

    sendPort.send([
      file,
      receivePort2.sendPort,
    ]);


    return await receivePort2.first;
  }
}