to make the problem clear I post some screenshots:
scummvm, hq3x, without aspect ratio

scummvm, hq3x, aspect ratio

dosbox, hq3x, without aspect ratio, resolution 1680x1050

dosbox, hq3x, aspect ratio, resolution 1680x1050

in scummvm I can't choose a resolution directly (but in dosbox I can) so I get those really annoying black borders (top, buttom).
is there a possibility maybe with the configs of scummvm to solve the problem or @the devs to implement such a feature like in dosbox?
btw the problem doesn't appear with no scaler and hq2x. but I don't wanna miss hq3x.