Future<bool> bitmap(int x, int y, int width, int height, int color, Iterable<int> bytes, {int background, bool xmb: false})

Draw normal or xmb bitmap (1 bit, 8 pixels per byte.)

This will break up large bitmaps in to multiple batches of grouped scanlines. The future returned completes with the success of all work.

Source 

Future<bool> bitmap(
    int x, int y, int width, int height, int color, Iterable<int> bytes,
    {int background, bool xmb: false}) {
  // num pixels wide / 8 pixels per byte.
  int scan = (width / 8).ceil();

  // either 49 or 47 bytes for per-packet data (sucks).
  int linesPer =
      (ArdProto.maxDataLength - ((background == null) ? 10 : 12)) ~/ scan;
  var work = [];
  for (int i = 0; i < height; i += linesPer) {
    var h = (height - i).clamp(0, linesPer);
    proto.log("scan: $i height: $h");
    var fut = proto.write(
        (background == null ? 15 : 16) + (xmb ? 2 : 0),
        _s2b(x)
          ..addAll(_s2b(y + i))
          ..addAll(_s2b(width))
          ..addAll(_s2b(h))
          ..addAll(_s2b(color))
          ..addAll(background == null ? const <int>[] : _s2b(background))
          ..addAll(bytes.skip(scan * i).take(h * scan)));
    work.add(fut);
  }
  return Future.wait(work).then((work) => work.every((e) => e == true));
}