[Openicc] [Gimp-print-devel] [Printing-architecture] Colour

[edmund ronald]

I would argue that if the Preview.app provides the softproof feature,
then it is caters to color-sophisticated users in the same way as
Photoshop, and probably expects the print system to deliver the
ability to print untagged.  But let's pass on that for a minute.

So, if we tag an image with eg. Generic RGB, it should pass through
the print system unmodded? But is this *should* or is it*does* when
one has an Epson? Will this work with the Epson/Preview combo?
Because if yes, then we can write a script to tag the target image
with GenericRGB, print it out interactively with Preview,  thereby
avoiding Photoshop and its own issues, and hey-presto, target printing
works again and lots of people can sleep better!

Edmund



On Mon, Nov 16, 2009 at 10:33 PM, Michael Sweet <msweet at apple.com> wrote:
> On Nov 16, 2009, at 12:14 AM, edmund ronald wrote:
>>> As for printing "untagged" images from the Preview application, you can't -
>>> Preview does not support this use case, and probably never will.
>>> ___________________________________________________
>>> Michael Sweet, Senior Printing System Engineer
>>
>> Why not? It can do softproofing, so why shouldn't it do target printing?
>
> Because target printing is only done by a very small subset of the Mac OS X user community?
>
> In any case, untagged images get pseudo-tagged with GenericGray/RGB/CMYK when printed, so if your printer driver uses these colorspaces for vendor matching mode (which turns out is most HP, Canon, and Epson inkjets) then you can print RGB target images without extra conversions beyond what the driver does...  The same trick can be done with PostScript printers by selecting one of the Generic color profiles from the Color Matching pane.
>
> (and yes, this is the null-transform path that many have complained about that Photoshop and friends are supposed to turn on automatically...)
>
> ___________________________________________________
> Michael Sweet, Senior Printing System Engineer
>
>
>
>