bytesFromDataUri function

Uint8List? bytesFromDataUri(String dataUri)

Returns Uint8List by decoding dataUri.

Supported encoding:

• base64
• utf8

Implementation

Uint8List? bytesFromDataUri(String dataUri) {
  final match = _dataUriRegExp.matchAsPrefix(dataUri);
  if (match == null) {
    return null;
  }

  final prefix = match[0]!;
  final encoding = match[1];
  final data = dataUri.substring(prefix.length);

  final Uint8List bytes;
  if (encoding == 'base64') {
    bytes = base64.decode(data);
  } else if (encoding == 'utf8') {
    bytes = Uint8List.fromList(data.codeUnits);
  } else {
    return null;
  }

  return bytes.isNotEmpty == true ? bytes : null;
}