Frederik Ramm wrote:
> 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.
-- 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
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