IPP

Current Status

• Send and receive IPP payload.
• Generate PWG Raster data.
• Print hard-coded bitmap using APIs above.

TODO

• Run-length encode bitmap to reduce size.
• Check printer attributes and generate rasters in a format appropriate for the printer.
• Implement an API that abstracts the protocol for ease of use.

About IPP and Driverless Printing

There are some specifications based upon IPP.

• AirPrint: Transfers page data with Apple Raster (image/urf), JPEG, and PDF.
• IPP Everywhere: Transfers page data with PWG Raster, JPEG, and PDF.
• Mopria: Transfers page data with PCLm (raster-only PDF subset), PWG Raster, and PDF.
• Wi-Fi Direct Print Services: Transfers page data with PCLm, PWG Raster, and PDF.

We should be able to get supported format by calling Get-Printer-Attributes, so I expect that driverless printing could be implemented by treating printers that support these standards as regular IPP devices.

Reference

• RFC 8010: Internet Printing Protocol/1.1: Encoding and Transport
• RFC 8011: Internet Printing Protocol/1.1: Model and Semantics
• PWG5102.4: PWG Raster Format [PDF]
• CUPS Raster Format (PWG Raster is subset of CUPS Raster v2))
• PWG Raster sample files
• PWG5101.1: PWG Media Standardized Names 2.0 [PDF]
• Driverless Printing Standards And their PDLS