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LPrint - A Label Printer Application

LPrint implements printing for a variety of common label and receipt printers connected via network or USB. Features include:

  • A single executable handles spooling, status, and server functionality.
  • Multiple printer support.
  • Each printer implements an IPP Everywhere™ print service and is compatible with the driverless printing support in Android™, Chrome OS™, iOS®, Linux®, macOS®, and Windows® 10/11 clients.
  • Each printer can support options such as label modes, tear-off offsets, media tracking, media top offset, print darkness, resolution, roll selection, and speed.
  • Each printer can directly print "raw", Apple/PWG Raster, and/or PNG files.
  • Each printer automatically recovers from out-of-media, power loss, and disconnected/bad cable issues.

For more information, see the file "DOCUMENTATION.md", the man pages in the "man" directory, and/or the LPrint project page at https://www.msweet.org/lprint.

Note: Please use the Github issue tracker to report issues or request features/improvements in LPrint:

https://github.com/michaelrsweet/lprint/issues

Requirements

LPrint depends on:

  • A POSIX-compliant "make" program (both GNU and BSD make are known to work),
  • A C99 compiler (both Clang and GCC are known to work),
  • PAPPL 1.1 or later.
  • CUPS 2.2 or later (for libcups).

Supported Printers

The following printers are currently supported:

  • DYMO LabelWriter printers
  • Zebra/Eltron EPL2 printers
  • Zebra ZPL printers

Others will be added as time and access to printers permits.

Standards

Through PAPPL, LPrint implements PWG 5100.14-2013: IPP Everywhere™ and the IPP Label Printing Extensions v1.0 for each printer, and has a partial implementation of PWG 5100.22-2019: IPP System Service v1.0 for managing the print queues and default printer.

Legal Stuff

LPrint is Copyright © 2019-2022 by Michael R Sweet.

LPrint is licensed under the Apache License Version 2.0. See the files "LICENSE" and "NOTICE" for more information.

LPrint is based loosely on the "rastertolabel.c" code from CUPS.