[Openicc] Synchronizing printer driver settings and printer profiles

[Jan-Peter Homann]

Hello to all,
Richards thanks, for the explanation of the Gnome Color Manager.

As  a result I have some more questions:
As Robert wrote, the driver is very important part of the printing 
system. How is the Gnome Color Manager handling the case, if two 
different drivers are available for the same printer ?
Lets assume, both driver vendors delivering a profile for plain paper 
for the same printer with the same qualifiers.
What happens in this case ?

Am I correct, that CUPS currently has no mechanism to automatically 
update an PPD with additional entries (or merge two PPDs) ?

Kai Uwe, am I correct, that Oyranos has already implemented the 
functionality to read ICC Metadata Tag and to extract CUPS qualifiers, 
if they are found inside the ICC-metadata Tag ?
If yes, is there a specification about this Tag ?
If yes, do you think it makes sense, that this Tag should be registerred 
at the ICC Tag registry ?

if yes:
Richard, do you think, that this specifications would fit the needs of 
Gnome Color Manager / colord ?
(So one proper tagged printer profile could be used either with Oyranos 
or Gnome Color Manager...)

Best Regards
Jan-Peter



Am 12.01.12 13:58, schrieb Richard Hughes:
> On 11 January 2012 15:45, Jan-Peter Homann<homann at colormanagement.de>  wrote:
>> E.g. would it possible, that e.g. a vendor for inkjet media could create a
>> set of an ICC-profile and a driver setting, which he offers for download
>> from his website, and which the enduser can import into colord ?
> I think that's too complicated. Lets say in an ideal world, the
> printer vendor cares about providing some good ICC profiles with their
> hardware. For example, Epson have two .icc profiles for a model, one
> for glossy paper, one for plain paper. If they include the following
> metadata in the ICC profile DICT tag:
>
> MAPPING_format=ColorModel.OutputMode.OutputResolution
> MAPPING_qualifier=RGB.Plain.*
>
> Then just clicking on the profile and installing it on the system
> would make the profile be selected for plain paper if the profile is
> associated with a specific printer. This is how the
> gnome-color-manager calibration program will produce profiles for
> printers that have the correct MAPPING data encoded in them so we
> don't have to ask the user what paper type a profile corresponds to.
>
> Of course, the other side of the problem is mapping the profile to the
> device automatically, which we can already do if the ICC profile is
> referenced in the printer PPD file. It uses the same MAPPING_format
> and MAPPING_qualifier formatting and logic, although it's fair to say
> the number of PPD files that reference ICC files is tiny.
>
> It would certainly be possible to add this kind of metadata into the
> profiles as well (MAPPING_device_id?) but is not currently
> implemented. It wouldn't be much work to add.
>
> Richard.
>


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