[cups.development] [printing-driver] Canon CAPT driver - WORK IN PROGRESS

[Alexey Galakhov]

Thank you, I've seen most of that stuff already. Can you please tell me any
links to LBP* open-source Japanese sites? I have someone who can read
Japanese for me.

Existing open-source drivers seem to work for many but not all models.
Canon's driver for LBP-2900 and similar models seem to rely on a
closed-source kernel. My work is heavily based on open-source drivers I
found so far. However, they do "model 0" ("SCoA") printers only, and recent
models of Canon are "model 1", or "Hi-SCoA". They use completely different
compression. The handshaking seems to bethe same, however.

I decided to use foo2xxx route for first (research) time only as it is
easier to use for testing WITHOUT complete printing subsystem. (I just use
"foo2capt < test.pnm" for testing now). I'll convert it into something
that's more correct immediately after getting it to work.

2010/5/24 Hin-Tak Leung <htl10 at users.sourceforge.net>

> You could have asked a lot earlier - The Canon people are one of the main
> group of people behind the openprinting vector printer driver on
> sourceforge.jp .
>
> As for information about the CAPT laser printers, and LBP printers in
> general, there are a few resources; there are a few lbp* printer models in
> gs at the moment; there are also some other open-source drivers on the
> internet from various people for lbp/capt drivers and there are official
> Canon drivers (close-source) on Canon's web site. Unfortunately both of the
> latter (open source drivers on the internet, and closed-source drivers for
> the capt/lbp printers) are available in Japanese and you'll need to read
> Japanese or find somebody who does to read up on it. I don't know about
> specific models and or how simliar they are. These pieces of information are
> not on the linux foundation openprinting web site, mostly because Till
> doesn't do Japanese, and also for the last one, has a policy not to list
> close-source linux drivers. But they are available.
>
> Lastly, please don't go the foo2xxx route - it is just not good practice -
> there are cups raster, ijs, opvp, all trying to have a closer/faster
> co-operation with the rendering upstream.
>
> --- On Sun, 23/5/10, Alexey Galakhov <agalakhov at gmail.com> wrote:
>
> Hello!
>
> I'm working on the driver for Canon so-called CAPT laser printers based on
> reverse engineering. I own a LBP-2900 one. So far, I have something like
> working Hi-SCoA compression and CAPT command i/o. I'm able to print small
> images but, for some reason, the printer stops responding if trying to print
> something that is more than 100 lines in height.
>
>
> I'm looking for any help in debugging my driver, reverse engineering the
> printer and so on.
>
> Everything I wrote is available on Sourceforge at foo2capt.sourceforge.net.
>
>
> With best regards,
> Alex
>
>
>
>
>
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