Acknowledge compass direction of the photo

I would like to be able to tell the program which way my custom photo is facing, and have the program reflect that, for example, in the way the sun rises and sets, i.e., if the photo faces North, sun should move from right to left. Other compass directions may be more tricky, of course. Take it as a challenge! it would make the whole thing a bit more real. Kudos from a long time user. :)