[sane-devel] test backend & SANE_INFO_INEXACT

Ralph Little skelband at gmail.com
Wed Jun 9 19:38:35 BST 2021


On Wed, Jun 9, 2021 at 10:04 AM Jeff <jffry at posteo.net> wrote:

> There is a gscan2pdf user with a Fujitsu scanner who has found a bug in
> gscan2pdf:
> https://sourceforge.net/p/gscan2pdf/mailman/message/37297482/
> I'm guessing it is a corner case to do with the scanner setting
> SANE_INFO_INEXACT when the user sets most geometry options.
> I am having trouble reproducing the problem locally because I don't have
> a similar scanner, and my HP doesn't set SANE_INFO_INEXACT.
> The test backend has an option "read-return-value", allowing frontend
> developers to test statuses, but I can't find a similar option for info
> values.
> Is there some other way of testing info values in frontends?
> If not, is there a maintainer for the test backend?
> If so, would you be able to add such an option?
> If not, would you be open to a patch to add such an option?
> Regards
> Jeff
Probably the best bet would be to add another int test control option that
sets a different value to the one selected (val + 1?) and returns
SANE_INFO_INEXACT. I will have a look this lunchtime to see if I can bash a
patch together.

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