[Poppler-bugs] [Bug 79019] pdftoppm and pdfimages produce a pale image for an ICC based CMYK colorspace image

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79019

--- Comment #1 from Thomas Freitag <Thomas.Freitag at alfa.de> ---
Created attachment 99510
  --> https://bugs.freedesktop.org/attachment.cgi?id=99510&action=edit
use alt colorspace to get CMYK values for an ICC based CMYK colorspace

The reason for the pale image is that GfxICCBasedColorSpace::getCMYK() uses the
cms transformation to get RGB values and the convert it back to CMYK even for a
ICC based CMYK colorspace instead of just returning the CMYK values itself. 

This patch solves that.

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