Was it wrapped up... Is the picture framed?
This is realitivly important to the meaning. I mean if he framed it and wrapped it, then he really wanted you to make sure that you looked at it. He knew that it would mean something to you and thus, means that he cares for, at least, your feelings, which makes your friendship more than casual...
But, if he just handed you a pic and said, hey were in it... Keep it. That may not mean so much. But still, if your asking yourself if this guy likes you more than casual friendship..that means that you have, either probably noticed somethings, or that you want it to be more. So my advice..ask him..
Or flirt a bit to get how he reacts to it..make continued eye contact...smile alot at him... ect..
Of course i could just be infering here...