[Poppler-bugs] [Bug 68986] pdftoppm doesn't render eci_altona-test-suite-v2_technical2_x4.pdf correctly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68986

--- Comment #11 from Thomas Freitag <Thomas.Freitag at alfa.de> ---
A few additional remarks to test "D": 
if pdftoppm is just called with -png, and so splash works internally with RGB,
the result for line 3 of this test (the gray shown squares) is incredible, even
with the solution for bug 34053: there is nearly no difference / contrast in
the gray values.
The reason for this is in my opinion that the background color gray is produced
DeviceCMYK 0.32/0.32/0.32/0.32.
If we compile poppler with #define SPLASH_CMYK 1 and then call pdftoppm with
-png -overprint (only reason for the usage of the overprint option is to force
splask working in CMYK mode) the rendering result is much better.
(in my eyes an additional reason to remove the define and always compile the
SPLASH_CMYK branch!)
Therefore I will not search for a solution!

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