Re: was - P700 and P900 full channel support

I checked out the git repo (branch master) and I started reading "The
Developer’s Guide to Gutenprint".
Unfortunately I can not find the printers.xml as mentioned in the guide -
instead ./src/xml/printers/escp2.xml contains the Epson models. Is this the
correct file? Maybe the guide is not up-to-date?

In ./src/xml/printers/escp2.xml the SC-P700 and SC-P900 is not listed. Does
this mean that both models are not supported yet or is it the wrong file?


Am Mo., 1. Nov. 2021 um 23:47 Uhr schrieb Robert Krawitz <[email protected]>:

> On 11/1/21 1:29 AM, Oliver Kowalke wrote:
> >
> >     It should be possible to support this, other than the violet
> channel.  We could support the violet
> >     channel for raw printing (i. e. the user has to do the separations),
> but actually supporting the
> >     violet ink for normal printing would be a fair bit of tuning work
> and would need to be hands-on.  If
> >     you're interested in doing this, be prepared to put a lot of time
> and a fair bit of consumables
> >     into it.
> >
> >     The first thing to do would be to look at
> src/xml/escp2/inks/cmykrb.xml in the Gutenprint source
> >     tree to see an example of what we did for the R1800 and R800, which
> is CMYK+red+blue (which is
> >     actually closer to purple, but Epson calls it blue).  The most
> non-standard part of this is the
> >     <Curves> section, which is a set of transfer curves for each ink
> channel by hue, starting with
> >     blue=0.  I always tested these by printing a rainbow sweep pattern
> and trying to get as good of a
> >     match as I could with ordinary CMY(K).
> >
> >     My thought about this is that we should at least at first only
> support the violet ink in raw mode,
> >     as effectively a spot color.
> >
> > Your description applies to the violett channel?!
> > Because I'm new to print driver development I'd like to start with
> supporting the matte black
> > channel. At least I think it should be easier, right?
> > What  would be your advice to start?
>
> The channel ID for matte black will probably be the same as it is on every
> other printer that uses
> matte black.
>
>
> _______________________________________________
> Gimp-print-devel mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/gimp-print-devel
>

_______________________________________________
Gimp-print-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/gimp-print-devel