[Openicc] Ghostscript CMS [was: PDF frustration]

[Gerhard Fuernkranz]

Michael Vrhel wrote:
> You bring up an excellent comment with respect to proofing and effects. My inclination is not to get the proofing profile tangled up in Ghostscript. If someone really wants to use one, then the proofing application should really make that adjustment after ghostscript has created the result for the destination profile. That said, I am open to hear arguments to the contrary.

Michael,

IMO one contrary argument is that a subsequent color conversion is very
hard to accomplish if not impossible once gs has rasterized the page to
a bi-level image (in those cases where the halftoning is already done by
gs and not by a subsequent backend - and I guess you don't plan to
discontinue gs' halftoning functionality).

On the other hand it is IMO theoretically possibly to create a let me
call it "proofing output profile", whose B2A tables combine the
transformations PCS -> emulated printer color space (-> PCS) -> actual
printer color space. Proofing could then be easily enabled by supplying
such a profile to gs as output profile, w/o need that gs must be aware
of proofing. I just don't know a readily available tool for building
such a profile [to a limited extend this can be accomplished in two
steps with help of the lcms icclink utility, using the -x option].

Regards,
Gerhard