printEscPosWin32 method

void printEscPosWin32(List<int> data)

Implementation

void printEscPosWin32(List<int> data) {
  final hPrinter = alloc<Pointer>();
  final docInfo = alloc<DOC_INFO_1>();

  final printerNamePtr = printerName.toNativeUtf16(allocator: alloc);
  final docNamePtr = 'ESC/POS Print Job'.toNativeUtf16(allocator: alloc);
  final rawDatatypePtr = 'RAW'.toNativeUtf16(allocator: alloc);

  docInfo.ref.pDocName = PWSTR(docNamePtr);
  docInfo.ref.pOutputFile = PWSTR(nullptr.cast());
  docInfo.ref.pDatatype = PWSTR(rawDatatypePtr);

  if (OpenPrinter(PCWSTR(printerNamePtr), hPrinter, null).value) {
    final printerHandle = PRINTER_HANDLE(hPrinter.value);

    if (StartDocPrinter(printerHandle, 1, docInfo.cast()) != 0) {
      StartPagePrinter(printerHandle);

      final buffer = alloc<Uint8>(data.length);
      buffer.asTypedList(data.length).setAll(0, data);
      final bytesWritten = alloc<Uint32>();

      WritePrinter(
        printerHandle,
        buffer,
        data.length,
        bytesWritten,
      );

      EndPagePrinter(printerHandle);
      EndDocPrinter(printerHandle);
    }

    ClosePrinter(printerHandle);
  }
}