Re: Inadequate ColorSync support.
Re: Inadequate ColorSync support.
- Subject: Re: Inadequate ColorSync support.
- From: Graeme Gill <email@hidden>
- Date: Thu, 20 Nov 2003 14:39:21 +1100
John Fieber wrote:
>
(k) A more standard print panel the user to select a per-job
>
parameters. It would have a drop down menu with something like:
>
>
Auto (driver decides)
>
None (disable color management, REALLY)
>
list of installed profiles
>
...
>
"Other..."
Designing such a system is a little more complicated than it
appears. What do you really mean by "None" ?
There are devices out there with 7 or more native inks (CMYKcmk, or CMYKOGcm)
for instance, and handling such device spaces is not very well standardized.
Neither the rasterizers, file formats, printer driver APIs nor
profiling software handle this sort of thing in a dependable way,
if at all. In most printing systems, such "special" device colors are
handled deep within the driver or device itself, just before, or as part
of the screening sub-system. Would you really want "None" to mean
CMYKcmk or CMYKOGcm at the current point in time ?
I would suspect that what you want for "None" at present, is actually
the support of a "pseudo" device colorspace such as CMYK, where the
driver takes care of the separation into CMYKcmy, since the handling
of CMYK is very well supported in terms of rasterizers, file formats
and color calibration software. The missing link appears to be at the
print driver API level. [To be fair, I haven't looked at the relevant
APIs in Windows and Mac recently.] If the operating system vendors would
expand the print driver API to allow the print driver to negotiate with the
application amongst a choice of "Native" spaces (Including possibly pseudo
devices spaces such as a CMYK, as well as truly native spaces),
then we might see a better range of interpretable tools that allow
better control over printed color.
Graeme Gill.
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