Proper color management with ICC profiles

[T-3B]

Proper color management with ICC profiles

[phillipberndt]

pqiv uses GTK's own GdkPixbuf for rendering standard file formats, and it looks like it doesn't really support this:

https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/104

Do any Gnome default viewers get this right for you? If yes I could take a look at how they do this.

Does disabling the gdkpixbuf backend fix this for you?

[T-3B]

GdkPixbuf supports ICC profiles.
An example of Gnome viewer supporting this JPG file: "Eye of Gnome"

Does disabling the gdkpixbuf backend fix this for you?
No, as well as disabling everything except wand (ImageMagick)

A "friend of mine" explained me:

the ICC profile is a base64-encoded null-terminated ASCII string icc-profile option key used in gdk_pixbuf_get_option

you can call gdk_pixbuf_get_option("icc-profile") which returns a gchar * string, and then you can use g_base64_decode to get the actual ICC profile buffer which can be fed to lcms2 or something of that form

I don't know many things about all that stuff (sorry), but it feels like it is possible to render this JPG correctly in pqiv.
Thank you for your fast answer!