[okular] [Bug 192623] add color management support to Okular

[Tobias Bora]

https://bugs.kde.org/show_bug.cgi?id=192623

--- Comment #4 from Tobias Bora <tobias.bora at gmail.com> ---
So I made a deeper analysis: so Okular does support input ICC profile (but you
need to properly create the pdf, see https://www.color.org/version4pdf.pdf for
a nice example and https://tex.stackexchange.com/a/709430/116348 for creating
them from LaTeX), but my understanding is that it is NOT taking into account
the monitor output ICC profile, so my guess is that it uses a basic sRGB output
profile.

So for instance, in my laptop I have by default a monitor profile created by
KDE (see KDE configuration > color management):
```
$ xprop -display :0.0 -len 14 -root _ICC_PROFILE
_ICC_PROFILE(CARDINAL) = 0, 0, 4, 156, 108, 99, 109, 115, 4, 48, 0, 0, 109, 110
```
Now, this monitor profile will make colors more saturated… but Okular is
apparently not applying the monitor profile, so the color looks like a basic
sRGB output profile. I will attach an example pdf showing the issue, together
with a screenshot comparing with what other tools like Geequie show.

-- 
You are receiving this mail because:
You are the assignee for the bug.