[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 #19 from Thomas Freitag <Thomas.Freitag at alfa.de> ---
Created attachment 97906
  --> https://bugs.freedesktop.org/attachment.cgi?id=97906&action=edit
solves blend mode problem in CYMK and DeviceN for separable blend modes

This patch fixes the incorrect output for patch "N" if using the overprint
parameter, and if using the overprint parameter we get the correct output as
expected in the eci documentation.

BTW, it also solves nearly every regression in patch "S" to "Z" and patch "G",
if the overprint parameter is used because then the PDF is rendered in DeviceN
bitmap and the blend modes now are applied correctly!

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