convert method

Implementation

@override
Buffer<int> convert(
  List<int> input, {
  PixelFormat<int, void> format = abgr8888,
}) {
  final Uint32List view;
  if (input is TypedDataList<int>) {
    view = input.buffer.asUint32List();
  } else {
    view = Uint32List.fromList(input);
  }
  final width = view[0];
  final height = view[1];
  final output = IntPixels(width, height, format: format);

  // Reverse of the above encoding.
  var word = 0;
  var bit = 0;
  var offset = 2;
  for (var i = 0; i < output.data.length; i++) {
    if (bit == 0) {
      word = view[offset];
      offset++;
    }
    output.data[i] = (word & 1) == 0 ? format.zero : format.max;
    word >>= 1;
    bit++;
    if (bit == 32) {
      bit = 0;
    }
  }

  return output;
}