On Tue, Aug 01, 2000 at 02:02:14PM -0700, Stephen Williams wrote:
> I just might. How 'bout a JPEG file backend (kinda like the PNG driver)
PNM driver? Good idea, but I wouldn't recommend using the PNM driver
as an example to crib from, except at a very surface level.
> that can read jpeg files and supports passing JFIF or RGB to the app?
Yes, great idea. The proposal for SANE 1.x / 2.x I wrote at
http://www.ecs.soton.ac.uk/~njl98r/code/ suggests that the JFIF
data would be sent in a frame of type
SANE_FRAME_JPEG, a constant with the value 11, but you'd have to
hard-code that in your backend for now I suppose.
Assuming previews (if they're supported at all) are RGB only, to
add support for _FRAME_JPEG to Xsane and so on is not difficult
either, once the JPEG backend exists.
A standard option for JFIF vs RGB (vs G3 ...) would be nice, and
I didn't include one of those in that proposal, mostly because I
hoped I'd get more feedback before continuing :(
What else that you'd want in a "first cut" driver for your hardware
is missing from the revised SANE 1.x as proposed? I have never seen
any other proposals extending 1.0 but it's obviously needed, so I
submit what little I had done for further improvements.
> In the process I would need to take it upon myself to define the file
> format interface and present it to the list. We have a discussion about
> this a while ago (remember?) so maybe I should just shut up and do it?-)
>
> My desk is pretty full (I have my own GPL projects, too:-) but this
> just might qualify as work related, and that would free up some of my
> time.
> --
> Steve Williams "The woods are lovely, dark and deep.
> steve@icarus.com But I have promises to keep,
> steve@picturel.com and lines to code before I sleep,
> http://www.picturel.com And lines to code before I sleep."
>
>
>
> --
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