Gutenprint Printer Application (Native)

Hi,

I have created a Gutenprint Printer Application by retro-fitting 
Gutenprint's CUPS driver into a Printer Application using PAPPL 
(https://github.com/michaelrsweet/pappl) and my CUPS driver retro-fit 
library pappl-retrofit (https://github.com/OpenPrinting/pappl-retrofit):

https://github.com/OpenPrinting/gutenprint-printer-app
https://snapcraft.io/gutenprint-printer-app

Note that this is only an interim effort, as the right way to make a 
Printer Application out of Gutenprint is a native Printer Apoplication, 
not using PPDs, the CUPS filter, and the CUPS backend of Gutenprint, but 
instead, use only PAPPL and libgutenprint. Therefore I will maintain 
this Printer Application only as long as there is no native Gutenprint 
Printer Application from the Gutenprint project, once that is there, I 
will discontinue my Printer Application.

Note that the retro-fit is not perfect, especially due to the restricted 
number of vendor-specific options in PAPPL I could base my Printer 
Application only on the simplified PPDs and not on the expert ones.

I also included the CUPS backend for dye-sub printers but could not 
actually test it.

So please test my Printer Applications on printers which I do not have 
(I only have the HP OfficeJet Pro 8730, which my Gutenprint Printer 
Application sets up as PCL Color Laser). Issue reports and pull requests 
are more than welcome.

Sambhav, still working on a native Gutenprint Printer Application?

I hope my Printer Application will give some inspiration towards the 
development of a native Gutenprint Printer Application.

    Till