[Openicc] colord Printing Plans, CPD and Gutenprint role of PPD

[Jan-Peter Homann]

Hello Richard and all,
First you write "the PPD is never changed"
For the use case "Importing new settings witth assigned bundled 
profiles" you write that CUPS reads the PPD file, when the printer is 
connected.

This doesn´t go together in my head.. (may be I´m too dumb...)

If we have the ability to export and import driver settings with 
assigned /bundled profiles, such settings will never be part of a 
standard PPD. We also should be able to handle the case of several 
sources, which may offer driver settings with assigned /bundled 
profiles. (Imagine e.g. different media vendors offering profiles for 
their media).

So for me, it is still unclear, how we handle this use case with CUPS 
and colord and the printing GUI.

******
We should at least agree, if the proposed direction should be somekind 
of dynamic updating of PPDs, or if handling of driver settings and 
assigned / bundled profiles should be handled outside the PPD.
******



Lets imagine concentrate to speed up implementation with a PPD based 
approach for describing driver settings and assigned profiles which will 
be public available in distros soon.

We than discover, that updating the PPD after importing driver settings 
with bundled profiles is quite complicated. Another approach where the 
driver talks directly with colord would be better and will be 
implemented in a second step.

After implementing the second appoach, the users will be quite 
disorientated about such changes.


Best regards
Jan-Peter



Am 28.02.11 15:51, schrieb Richard Hughes:
> On 28 February 2011 14:32, Jan-Peter Homann<homann at colormanagement.de>  wrote:
>> Richards answers are seeming not be constent to me, either:
>> - updated settings and assigned profiles need updating of the PPD, or
>> - The PPD is used for static parameters only. Driver settings and profiles
>> are handled beside the PPD
> The PPD is never changed. If the PPD specifies an ICC profile (very
> rare) then we add that, but most PPDs don't contain any ICC profile
> links at all. So we support the "soft" profiles from the PPD, but also
> support the "hard" profiles from the user.
>
>> - importing new settings in the printer driver with assigned / bundled
>> profiles,
> CUPS reads the PPD file when the printer is connected and add the
> profiles to colord.
>
>


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