[Openicc] [Gimp-print-devel] Common Printing Dialog: PPD extension specs updated

[Kai-Uwe Behrmann]

Am 04.08.08, 23:53 +0200 schrieb Till Kamppeter:
> Hal V. Engel wrote:
> > I don't think this is off topic. After all the thread is about PPD files 
> > and the Common Printing Dialog and Kai-Uwe asked if the cupsICCProfile 
> > part of the PPD specification was going to be implemented in the new 
> > Common Printing Dialog. In addition, the thread mentioned color 
> > management as one of the reasons for a spec change for PPD files. This 
> > seems to me to be right on topic. I also want to know the answer to this 
> > question. Is the new printing dialog going to support color management 
> > and will it be able to make use of cupsICCProfile info from PPD files?
> > 
> > Hal
> > 
> 
> It is a good idea to add the color profile support to the dialog. But 
> are clients able to download the ICC profile from the CUPS server? Would 

It is to be expected that often device profiles will be installed on the 
printer host. Thus they are potentially visible to all users. Then the 
profile might be needed to deploy early colour binding and render a pre 
separated PDF, show a colour matched preview or mark out of gamut colours 
to give precise feedback on the to be expected results.

Users might have created custom profiles and have them locally installed 
and configured. They might want to colour match images later on the 
remote printing host.

If remote colour management shall work a remotely installed profile must 
be exchangeable to allow for a local selected profile. The selected 
profile should be passed by the spooler to the remote *toraster filter.
Whether base-64-UU-encoding is a option for both directions I can not 
answere. I do not know exactly, how data or postscript sequences are 
embedded into the print stream and how they are decoded on the *toraster 
back end side. Even though it would be interessting to know.
I found as well no limitation about data blob sizes in a PPD other than a 
single PPD line not to exceede 255 chars. So there is a hope that ICC 
profiles could be embedded into PPD's.


Otherwise, I found Hal has most things answered already.


kind regards
Kai-Uwe Behrmann
-- 
developing for colour management 
www.behrmann.name + www.oyranos.org


PS: cc'ing to OpenICC