
These properties now are tagged unions: - ClutterColorimetry: Can be from colorspace or primaries; - ClutterEOTF: Can be from known tf or custom gamma exp (next commit); - ClutterLuminance: Can be defined explicitly or derived; Make the color management protocol use them too. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4020>