#565 fullscreen does not scale to desktop size

[zootus]

I'm testing on a raspberry pi 3 with no Xorg running, console only, 1360x768 HDMI monitor.

This is the conf:
fullscreen=true
fulldouble=false
fullresolution=desktop
or: fullresolution=1360x768

when i try
output=surface or opengl or openglnb
i get original size (too small)

output=overlay DOES scale to maximum
but it uses too much CPU (even without scaling), so emulation stutters (audio too)

Please enable scaling with opengl