[cups] iOS 15 AirPrint changes

[Jeff Dyck]

Anyone had a look at iOS 15 with a CUPS server yet?  I tried on Friday and it seems iOS has made some big changes to printing this time around, some good but a few issues have come up for me that I’m wondering if anyone else has looked at?

On the positive side, there are a more printer features supported.

On a test Xerox Altalink B8155 shared from CUPS 2.3.3, I get the following new / changed options:

- Paper size: with a huge list of possible page sizes, including things like envelopes
- Orientation: landscape or portrait
- Media and quality:
	- Feed from => Auto, Tray 1 - 5
	- Media Type => Auto, Card stock, Envelope, Labels, Letterhead, etc
	- Print Quality => Draft - Normal - Best
- Finishing Options (Options like staple and hole punch move from a root level check box to a more detailed submenu) 
	- Staple => None, Single (top left), Single (bottom left), Double (left), Double (top)
	- Punch = > None, Double (left), Double (top), Triple (left), Triple (top)
	- Output bins => Right, Auto, Center, Left

Unfortunately, there are also a couple of issues:

- Unlike previous versions of iOS, I don’t get asked for user name / password when I try to print.  Instead I get a dialog saying: Account information required for “printer name” Enter the account information in the print options.  I can’t find anywhere to enter these credentials though, so currently I cannot print.  

- With the new Paper size options, it doesn’t choose something like Letter as the default pages size.  On a test Xerox Altalink B8155 it chooses an Envelope size, and an on a test Altalink C8055 it chooses B6.  I can’t currently print so it may save this after the first time, but currently every time I go to the print dialog I have to redo this choice.

Jeff