[poppler] Implement overprint in qt interface?
Thomas.Freitag at kabelmail.de
Sun Oct 14 10:50:56 PDT 2012
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.
> 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
>> _______________________________________________ poppler mailing
>> list poppler at lists.freedesktop.org
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