[poppler] Implementing overprint in Splash

Thomas Freitag Thomas.Freitag at kabelmail.de
Mon Mar 28 22:41:44 PDT 2011

On 29.03.2011 00:54, Albert Astals Cid wrote:
> A Dilluns, 28 de març de 2011, Thomas Freitag va escriure:
>> Here now a first implementation of overprint in poppler.
>> But beside this open issues the output seems to be quite well and shows
>> a better output.
> Is not clear to me if the mail you sent is just a progress report or you
> actually want the code to be added to poppler (i.e. reviewed and tested).
> Could you clarify that?
I actually want the code to be added to poppler:
a) in splashModeCMYK8 it is all we can do (simulating overprint), and it 
has really big enhancements.
b) implementing splashModeDeviceN will be a bigger project and have to 
wait at least until my next vacation.
c) perhaps one of the front end developper want to create a new option 
"simulate overprint" simular to Acrobat Reader in the meantime?

BTW, if You take my first patch for pdftoppm only as a start point, i.e. 
run it with the new option "-overprint" over Your test suite, and then 
run the overprint implementation patch with the option "-overprint" 
against it, so really a regression test, You'll see the enhancements of 
the overprint patch.

> Thanks,
>    Albert
>> Thomas
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