Hi,
since I badly need scanimage as a commandline tool and there seems to be no
progress on the issue
https://gitlab.com/sane-project/backends/-/issues/642
I would like to try myself to work on a fix. However, I would need some
guidance about where to look in the code.
Could someone give me a hand? Also, every piece information is very welcome!
I don't know, what endeavour I am embarking on and what my
chances will be...
What do you think about my chances?
I've just read the issue for the first time and haven't been involved but I
noticed that you mentioned "Works with all formats (jpeg, tiff, png, pnm)
and with a resolution of 600. scanimage does not crash, the images are not
corrupt." and then provide examples where it does crash.
However, you don't say if you can make it crash with a pnm format output.
If you haven't done so, it might be worth trying to make it crash with a
pnm output.
1) If it never does then it would suggest (to me) that the bug is between
the scanning code and the format conversion code: perhaps the backend
provides information that causes the format conversion code to be
initialised incorrectly for the page size, which causes trouble when data
aligns (or doesn't align) in certain ways.
2) However, if a pnm is produced but is truncated then you know the problem
is with the amount of data that the backend is collecting.
3) If it still crashes in the same way then that could eliminate the file
conversion code and point to a (perhaps) more serious bug in the backend.
Anyway, perhaps this is useful?
Good luck with the debugging.
Best wishes,
@ndy
--
andy...@ashurst.eu.org
http://www.ashurst.eu.org/
0x7EBA75FF
