[sane-devel] HP 2400 Status

[Stéphane VOLTZ]

	Hello,

	the HP2400 is no yet supported. There early elements in the genesys backend 
but it won't work. In theory, the 2400 is supposed to be like the 2300, but 
with a 1200 dpi max resolution instead of 600.
	What is left to do is to put the exact values needed in genesys_devices.c . 
These values will have to be found in usb logs of the scanner operating under 
windows.
	Then, you can use all HP2300 constants as a guide to find all the places 
where you'll have to update the code for 2400 handling. Be aware that doing 
such will use the 'old methods' for building slope tables and computing 
exposure. It is worth evaluating the 'new methods' used in the gl841, since 
we may swith the 2300 and MD5345 to it some time in the futur.
	One problem I got with the 2300 was the way it sets the frontend. I couldn't 
get it work like in the usb logs, and fall back to the working current method 
which modelled after the MD5345 method.
	I used usbsniff+ a bunch of awk scripts to decode them. They are appended to 
the message.

Regards,
	Stef
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