On 14.10.2012 17:23, Adam Reichold wrote:
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Hello Thomas,
Thanks for the offer. As I understand it, this simulates how the
actual physical layers of colour would mix in real printing? It does
sound like a sensible feature to me.
No, that's not true. Overprint is a feature already introduced in
PostScript and is also defined in the PDF spec, see i.e. chapter 8.6.7
as an introduction. But there are only a very few free available viewer
which implements it. Beside acrobat reader (and of course poppler :-) )
I only know ghostscript which implements it. And even in ghostscript it
is not well known because overprint works only in subtractive
colorspaces like CMYK, so You have to render in a CMYK-like colorspace
and then convert the result to RGB to see it on the monitor. And this is
what the just uploaded patch does.
Cheers,
Thomas
Why not post the patch to discuss the feature's merits based on that?
Best regards, Adam.
On 14.10.2012 13:47, Thomas Freitag wrote:
Hi folks!
Is there anybody in the community who wants the possibility to
simulate overprint in qt library? With the implementation of
DeviceN support in splash this is quite easy now, so I can upload a
patch. For everybody who doesn't know anything about overprint I
attach three screenshots which shows the implementation in okular.
(This is not fake, I made a small apprentice piece today morning
:-) )
Cheers, Thomas
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