Frederik Ramm wrote:
>
> Hi,
>
> in the SANE spec it says:
>
> > While setting up the device, it is also admissible to call
> > sane_get_parameters() to get an estimate of what the image
> > parameters will look like once image acquisition begins.
>
> Does that mean in the backend I have to calculate the scan width in
> pixels, the bytes per line value, etc. every time the user changes an
> option? Until now, I was planning to do these calculations only once,
> in sane_start, but that would mean that you'll get meaningless results
> from sane_get_parameters() unless sane_start has already been called.
When sane_start has been called sane_egt_parameters has to return
exact values. sane_get_parameters can be called befor sane_start
and in this case the values should be correct too, if they are not exact
that have to be as close as possible to the correct values.
Bye
Oliver
-- Homepage: http://www.rauch-domain.de sane-umax: http://www.rauch-domain.de/sane-umax xsane: http://www.xsane.org E-Mail: mailto:Oliver.Rauch@rauch-domain.de-- Source code, list archive, and docs: http://www.mostang.com/sane/ To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
This archive was generated by hypermail 2b29 : Mon Mar 05 2001 - 13:00:18 PST