I have noticed that the resolutions of the Gameboy / gbc & Gameboy advance games on the gcw is slighty minimized (smaller) compared to the original. Since the screen is actually bigger than the gb(c) / gba and the resolution higher, isnt there a way to have the true original resolution on the gcw in 164x140 pixels (as original size seen on a computer for exemple, not minimized for the gcw) for the gb(c) and 240x160 for the gba ? And if not would it be possible to have a scale that is closer to the original gba screen ? because the ones in the ReGBA options are far from it.
Here's a picture that explains the problem better :
It is already possible on both emulators. There are plenty of scalers there.
Go to Menu > Video Settings > Upscaler and select the scaler of your choice.
You got plenty of them, ranging from Native (no scaling), multiple upscalers which mantain the aspect ratio, up to stretched fullscreen.
Fastest scalers are the hardware ones.
Go to Menu > Display Settings >Image Scaling and select the scaler of your choice.
You got plenty of them, from Native (no scaling) up to fullscreen (in both aspect ratio and stretch modes). You also got the Hardware option (fastest), which you can cycle between Aspect Ratio and Stretch by pressing Power+A
The GB(C) resolution is 160x144, not 164x140 by the way.