Am 14.09.2012 23:36, schrieb Oncaphillis:
On 09/14/2012 03:46 PM, Thomas Freitag wrote:
Hi Seabstian!
Am 13.09.2012 23:56, schrieb Oncaphillis:
Is it possible to generate CMYK Tiff Images using the poppler
utils ?
I've tried pdftoppm from the latest git pull put it end up somewhere
when in TiffWriter which complains that "Mode 6 is not supported".
As You perhaps already encountered, William created a patch for it (s.
https://bugs.freedesktop.org/show_bug.cgi?id=54896).
Yes -- thank you. The patch worked just fine. It should be included
into the master.
How's about generating bitap images with spot color plains ? Is
that on the road map ?
No, at least not on my roadmap. There are only a very few formats and
programs which support bitmap images with spot color planes. The only
formats for bitmap images I know are TIFF (really seldom used with spot
planes and if a TIFF contains spot planes most programs just ignore it
or complains about it) and PSD (Photoshop native) which has a better
support for it but is even more rarely supported. So it makes no much
sense to create a bitmap image with spot planes.
It's actually not about supporting it in a real file format. But
generating real spot color bitmaps would give great support for
raster image processors for printer devices.
In PSOutputDev (used by pdftops) we already support it, at least with
the level3 option and my DeviceN patch for postscript commited a few
month ago. The only open point is when a PDF page use transparencies AND
spot colors, because in the moment it is converted to a CMYK bitmap with
splash with a poor support for overprint. It would be quite easy to use
here now the DeviceN mode in splash, too and overprint the resulting
CMYK bitmap with the spot color planes. I could do that if anybody is
interested in it and provide some good samples for testing.
Cheers,
Thomas
Thanks for the reply
Sebastian
.
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