[Poppler-bugs] [Bug 68593] Vectorial image is not rendered correctly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68593

--- Comment #6 from Thomas Freitag <Thomas.Freitag at alfa.de> ---
Created attachment 121620
  --> https://bugs.freedesktop.org/attachment.cgi?id=121620&action=edit
Rendered and output in CMYK

(In reply to Andrés Gómez García from comment #5)
> The rendering is much better but the blue gradient (+ multiply blend) is
> clearly not the expected one. This is much greyer.

Oh, I see. But I fear that is beyond the scope of poppler if You compile it
just in RGB modus. Since the colors are a wild mix between RGB, CMYK and LAB,
the missing of icc profiles and the usage of blending modes we will never reach
exact the same color than acrobat, which uses it's own color management. And
even the screenshot you attached from acrobat 9 on linux differs a lot from
acrobat reader DC on windows.

But if I configure poppler to enable CMYK (not available in cairo, but in
splash)
./configure --enable-cmyk
and then call
./utils/pdftoppm -jpegcmyk -cropbox 68593.open/igalia\ header\ proof.pdf
output/igalia-cmyk.jpg

I get the attached result which is a little bit more blue

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