qr static method

List<int> qr(String text, { AlignPos align = AlignPos.center, QRSize size = QRSize.size4, QRCorrection cor = QRCorrection.L, })

Implementation

static List<int> qr(
  String text, {
  AlignPos align = AlignPos.center,
  QRSize size = QRSize.size4,
  QRCorrection cor = QRCorrection.L,
}) {
  List<int> bytes = <int>[];

  const cQrHeader = '\x1D(k';

  String reset = '\x1B@';

  bytes += reset.codeUnits;

  // FN 167. QR Code: Set the size of module
  // pL pH cn fn n
  bytes += cQrHeader.codeUnits + [0x03, 0x00, 0x31, 0x43] + [QRSize.size5.value];

  // FN 169. QR Code: Select the error correction level
  // pL pH cn fn n
  bytes += cQrHeader.codeUnits + [0x03, 0x00, 0x31, 0x45] + [QRCorrection.L.value];

  // FN 180. QR Code: Store the data in the symbol storage area
  List<int> textBytes = latin1.encode(text);
  // pL pH cn fn m
  bytes += cQrHeader.codeUnits + [textBytes.length + 3, 0x00, 0x31, 0x50, 0x30];
  bytes += textBytes;

  // FN 182. QR Code: Transmit the size information of the symbol data in the symbol storage area
  // pL pH cn fn m
  bytes += cQrHeader.codeUnits + [0x03, 0x00, 0x31, 0x52, 0x30];

  // FN 181. QR Code: Print the symbol data in the symbol storage area
  // pL pH cn fn m
  bytes += cQrHeader.codeUnits + [0x03, 0x00, 0x31, 0x51, 0x30];

  return bytes;
}