[Openicc] New feature to help calibrate drop sizes

[Robert Krawitz]

I've checked in a new dither algorithm named "Drop Size Segmented"
that's intended to help in calibrating drop sizes.

The way it works is that the 0-65535 range is segmented, based on the
number of significant bits in the drop size.  So for the usual 3 drop
size (00, 01, 10, 11), it's segmented into four ranges: 0-16383,
16384-32767, 32768-49151, and 49152-65535.  In the first range, drop
size 0 is printed; in the second range drop size 1, and so forth.

This only works when Raw color correction is selected (no density or
gamma correction at all); if Drop Size Segmented color correction is
selected in any other color correction mode, ordered dithering is used
instead.

-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lpf at uunet.uu.net
Project lead for Gutenprint   --    http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
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