Compared to Go-Play: Less smooth scaling (i.e. on Gameboy with Odroid-Go)

[NebulaH]

The scaling algorithm used in (at least Gameboy emulation) is less smooth than Go-Play's one
Although it is a very nice feature of retro-esp32 to have 3 scaling modes, the regulare "scale" mode is less clean when compared to the only option available in Go-Play. It is somewhat noticable with a static picture, but very clear when scrolling.

To Reproduce
Using an Odroid-Go: Run a gameboy (color) game in Go-Play and Retro-esp32 v2.5 and notice the unsteady scaling of the screen during scrolling of the latter.

Expected behavior
Maybe I should have looked into the code upfront, but I guess integer-scaling will prevent the described behavior.

Screenshots

Provided, but harder to see than a video.

Additional notes
Thanks for all the excelent work so far!