The first step is to associate an ICC profile to each screen. This can be done using xicc, from xicc-0.1.tar.gz. Simply run this specifiying the path to the relevant ICC profile and it will set the atom on the root window of the default screen (multi-screen support will be implemented next). For example:

$ xicc ~/tmp/ICM/ibmtplcd.icm

ibmtplcd.icm is the profile for the IBM ThinkPad LCDs.

Then patch Eye Of Gnome with this patch. Now when EoG opens a JPEG image which describes the colour space using the standard EXIF properties White Point and Primary Chromaticities it will create a profile on the fly, and when the image is displayed the profile for the screen is obtained and the image corrected.

There is a lot to do yet:

• Read embedded ICC profiles from JPEG and PNG files
• Read the whitepoint/chromatic information from PNG files
• Cache the profile from the screen
• Make xicc multi-screen aware

But it does work! I'll write a small specification for the atom I'm using shortly.

NP: Mrs. Cruff, Mr. Scruff