[poppler] DeviceN support in splash

Thomas Freitag Thomas.Freitag at kabelmail.de
Sun Apr 1 22:31:26 PDT 2012

Am 01.04.2012 22:09, schrieb Leonard Rosenthol:
> On 4/1/12 1:32 AM, "Thomas Freitag"<Thomas.Freitag at kabelmail.de>  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.

> Leonard
> _______________________________________________
> poppler mailing list
> poppler at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/poppler
> .

More information about the poppler mailing list