Supermarkets with an in store baker do the cakes with the printing on them. you can bring in a photo and they will put it on a cake. they basically get it printed onto a thin layer of icing and put that onto the cake. Which country are you in?

If the UK you should have a look at these people thecakedecoratingcompany.co.uk

PS not affiliated in any way :-)

Sometimes the stores will print them for you for a fee.  However, they are not allowed to make copies of any copyrighted/trademarked material. Some have preprinted ones of super heroes. If  not another thing I've done when decorating at home is buy a cheap picture frame and sanitize it put the picture inside and then place that on a cake. Dollar stores usually have cheap plastic ones that you won't have to worry about glass or anything.