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

[bugzilla-daemon at freedesktop.org]

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

Andrés Gómez García <agomez at igalia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #7 from Andrés Gómez García <agomez at igalia.com> ---
(In reply to Thomas Freitag from comment #6)
> Created attachment 121620 [details]
> 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.

Yes, you are right. I'm aware of that.

> 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

That actually looks pretty close to what I would be expecting. I'm also aware
that cairo doesn't have CMYK (nor color profile management) so I suppose we can
close this as fixed.

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