Hi,
On Mon, May 07, 2001 at 08:05:40PM +0200, Oliver Rauch wrote:
> In fact this is not defined very fine in the standard.
> But after a close look to the sources of scanimage/xscanimage/xsane
> it looks like all frontends do handle it the same.
> So we should mention in the standard that the also last sane_read
> that reutrns valid image data has to return with SANE_STATUS_GOOD.
It's not very clear but the standard mentions:
"The number of bytes returned is stored in *len. A backend must set
this to zero when the call fails (i.e., when a status other
than SANE_STATUS_GOOD is returned)"
So you can't return data if you don't return SANE_STATUS_GOOD.
Bye,
Henning
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