Am 01.04.2012 22:09, schrieb Leonard Rosenthol:
On 4/1/12 1:32 AM, "Thomas Freitag"<[email protected]> wrote:
Am 01.04.2012 06:18, schrieb Leonard Rosenthol:
Are you doing Nchannel as well, or just simple DeviceN?
Hmmh, more or less NChannel only: If I have no Colorants entry for a
spot color (no separation color space), a DeviceN colorspace is still
immediately converted to its alternate colorspace.
If you are using the DeviceN's primary alternate, then you are DeviceN and
NOT Nchannel. Nchannel alternate handling is much more complex, since you
have to evaluate on a colorant by colorant basis.
That's what I told: the primary alternate was always used and is the
fallback of my DeviceN implementation. What I impemented is the Nchannel
alternate handling.
I need the separation
colorspaces to produce the CMYK or RGB bitmap after rendering from the
DeviceN bitmap. But in the first implementation I ignore the
MixingHints, especially because I have no samples for it.
You also need to consider the ink order stuff as well, especially for
overprinting!
Can You provide me an example PDF? Then I can try to make my
implementation even better.
Thanks,
Thomas
Leonard
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