Indeed, in full screen, with "Stretch to display" disabled, PPSSPP will crop the picture instead of displaying black bars, as I said in a previous post 
You can request for a feature in this thread.

You can request for a feature in this thread.
♦ Intel Core i7-6700HQ | 16 GB RAM | NVIDIA GeForce GTX 960M | Debian Testing
♦ Intel Core i7-2630QM | 4 GB RAM | NVIDIA GeForce GT 540M | Debian Testing
♦ PSP-3004 | 6.60 PRO-C2
♦ Intel Core i7-2630QM | 4 GB RAM | NVIDIA GeForce GT 540M | Debian Testing
♦ PSP-3004 | 6.60 PRO-C2


