Those pictures are from TMNT Amazing Adventures #11
This is the closest canon thing we have about Donnie’s room.
But if you read this issue, you find out Donnie and Raph share the same room, while in the version of the Nick cartoon, Raph sleeps alone in his own room. Anyway, it’s something …
P.S: If there are no photos of April in Donnie’s room, it can’t be Donnie’s room at all