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To: root@deadline.snafu.de (Andreas S. Wetzel)
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Subject: Re: Need help on writing SCSI scanner driver 
In-reply-to: Your message of "Sat, 02 Aug 1997 12:31:42 +0200."
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Date: Sat, 02 Aug 1997 12:44:21 -0700
From: Amancio Hasty <hasty@rah.star-gate.com>
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I own a UMAX S12 and it works with sane and/or gimp 8)

sane has a graphical frontend and it also provides a plugin for
gimp so you can scan images directly into gimp .

You may want to joing the sane project:
http://www.azstarnet.com/~axplinux/sane/


	Cheers,
	Amancio


>From The Desk Of Andreas S. Wetzel :
> Hi!
> ---
> 
> Some time ago I started to write a high level SCSI driver for my
> AGFA Studio Star scanner. Now I'm facing some minor problems in
> the overall design of the driver code. My imagination of a scanner
> driver has been to have a device that is opened by the application
> software by a open(2) call and than configured to the correct scan
> parameters using ioctls before the scan data is retrieved via one
> or more read(2) calls. The problem in this context seems to be
> that the scanner is in fact able to deliver all the scan data
> at once, but the I/O subsystem seems to split a big read call into
> several 64k segments. Another problem is that the scanner expects
> the READ_SCANNED_DATA SCSI command to have a number of scanlines
> (not bytes) attached, so I will have to convert the number of
> bytes from a read(2) call to a number of scan lines internally
> in the driver code. My question is, if it is possible to read
> in all the scan data at once from the scanner (wheter or not
> it is handed to the user process in 64k segments). In other words,
> I do want to only issue a READ_SCANNED_DATA SCSI command to the
> scanner once, but not everytime a 64k segment is read by the user
> process.
> 
> Thankful for any advice.
> 
> Rergards, Mickey
> 
> -- 
>           (__)     
>           (@@)    Andreas S. Wetzel       Mail: mickey@deadline.snafu.de
>    /-------\/     Utrechter Strasse 41     Web: http://cenotaph.snafu.de/
>   / |     ||      13347 Berlin             Fon: <+4930> 456 066 90
>  *  ||----||      Germany                  Fax: <+4930> 456 066 91/92
>     ~~    ~~
>