toPNG method

@override Future<Uint8List> toPNG()

Returns the pixels of this as a PNG data.

Implementation

@override
Future<Uint8List> toPNG() async {
  var blob = await _canvas.toBlob('image/png');

  var reader = FileReader();

  var completer = Completer<Uint8List>();

  reader.onLoadEnd.listen((_) {
    var result = reader.result as List<int>;
    var bytes = result is Uint8List ? result : Uint8List.fromList(result);
    completer.complete(bytes);
  });

  reader.readAsArrayBuffer(blob);

  return completer.future;
}