[sane-devel] Resolution: range or list?

[Brian Potkin]

I have read

https://alioth-lists.debian.net/pipermail/sane-devel/2016-June/034624.html

and take away from it the idea that the resolution of a device (for
Epson scanners, at least) is exposed to a backend by the device's
firmware. Is there any reason why, if the device reports a resolution
range, a backend might choose to present only a list to the user?

The context is the hpaio backend.

For libsane-hpaio 3.10.6:

root at squeeze:~# scanimage --help -d
hpaio:/usb/psc_1300_series?serial=HU3AFBQ28Y9F | grep resolution
    --resolution 75..600dpi [75]

For libsane-hpaio 3.16.11:

brian at stretch:~$ scanimage --help -d
hpaio:/usb/psc_1300_series?serial=HU3AFBQ28Y9F | grep resolution
    --resolution 75|100|150|200|300|600dpi [75]

Some general indication of why it might be decided not to inform about
the scanner's full capability would be useful.

Regards,

Brian.