[Poppler-bugs] [Bug 81724] pdfseparate + pdfunite produce different pdftoppm renderings

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81724

--- Comment #23 from Thomas Freitag <Thomas.Freitag at alfa.de> ---
(In reply to Albert Astals Cid from comment #22)
> I get a regression on the rendering of page 134 of
> http://launchpadlibrarian.net/26748206/2001_these_mezouar.pdf when using
> "Don't change OC-references in image and xobject dictionaries with pdfunite"
> when doing pdfseparate + pdfunite
> 
> Can you confirm?

Yes, I can confirm :-D
The patch of comment 21 just looks for dict keys "OC" and treats it as optional
content. But the PDF of comment 22 uses on page 134 a font named "OC" ;-)
So in case of a key "OC" we have to look if it is really an optional content,
which means that it points to an optional content group or an optional content
membership dictionary.

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