[Openicc] Is CUPS the right place for printer color management...

[Chris Murphy]

So considering this, I would not reinvent the wheel. I don't see a problem with *cupsICCProfile. It enables exactly this future potential.

Chris

On Feb 7, 2011, at 3:43 PM, edmund ronald wrote:

> On Mon, Feb 7, 2011 at 10:00 PM, Chris Murphy <lists at colorremedies.com> wrote:
>> 
> 
>> Ask who is going to build the drivers before something else gets
>> implemented. Gutenprint does leverage *cupsICCProfile, although just as
>> defaults for grayscale, RGB and CMYK.
> 
> As I understand things, at the moment we tell Mac OS X that we accept
> its standard handoff workspace (previously Generic RGB) and we have
> Robert's manually constructed behavior that prints files in this
> workspace fairly decently. In the future the printers should be
> profiled for "standard" media, and FOR CONSUMER DEFAULTS we would
> somehow invoke a conversion from  the handoff space by using the
> printer profile. On OS X I think we will be able to continue to
> persuade the OS to do the conversion automagically, in Linux we might
> have some special piece of code to do that if we have to - but this is
> just so we have nice consumer default behavior.
> 
> At the moment, because of the desire to have decent default behaviors,
> the default print settings for Gutenprint do not really exercise a
> modern printer's gamut; this should change in the future, as soon as
> profile conversion can be invoked to render the handoff space data.
> 
> Concerning non-default behavior, for "pro" and "prosumer" printing the
> model I envision is that  the user does profiled printing, via a
> profile, either RGB or CMYK. I don't think we will do any workspace
> conversion, it's up to the user to apply a profile to his data
> somewhere upstream; we don't have the smarts to program the profile
> application ourselves well enough. We will provide some usable
> RGB=>CMYK conversion so that there is a usable RGB workflow.
> 
> I HAVE PERFORMED PRELIMINARY TESTING myself of this "pro" user-model,
> using our existing RGB=CMYK conversion, and can affirm that results on
> current Epson graphics printers will be roughly comparable to what is
> achievable with the present vendor drivers in quality, although there
> might be a very slight gamut advantage with the native Epson drivers.
> Once we go this way -sometime in the future - we would expect to
> supply "decent" canned profiles for this mode for the main Epson
> media, and other media can be profiled by us or profiles can be
> contributed by users TOGETHER WITH THE APPROPRIATE MEDIA SETTINGS.
> 
> Edmund