[sane-devel] sane_get_parameters / sample depth

[abel deuring]

Hi all,

I'm currently trying to improve the sane "glue layer" from PIL (Python 
Imaging Library). One of things missing there is support for other 
sample depths than 8. While it's obvious how to implement support for 
line art, I'm become more and more puzzled, if support for other sample 
depths than 1, 8 and 16 is required. We had a discussion about this some 
time ago, but I must admit that I'm too lazy to scan through the mail 
archive in order to get answers to my question...

Could somebody give me a clue about the possible sample depths?

Abel

PS: Next question, if a program/library calling the Sane API must 
support other pixel depths than 1/8/16: How is the data aligned within a 
word / byte? E.g., for sample depth 3, will the possible values be 0, 1, 
2, 3, 4, 5, 6, 7 or 0, 32, 64, 96, 128, 160, 192, 224 ?