Apaczer
commented
8 months ago The LDK is an Ingenic device which uses HW scalling by onboard GPU (not preset on our devices), for that they have separate video driver on RA (sdl_dingux_gfx). The other spectrum is Trimui Model S, which rely on picoarch a minimal frontend for libretro cores (think of it as completely different app able to load RetroArch cores) - original author decide to go with custom pixel interpolation method.
Official Miyoo's RetroArch build use sdl_rs90_gfx driver for max performace, thus other pixel mixing. There is an option to load standard sdl driver with bilinear filtering, but it is waaaay slower that semi-linear. For now I suggest for you to try different "Video Filters". maybe they will suit you.
Xtremis77
I was looking at the image quality on devices from more or less around the same time / similar specs, and the LDK Game, and the Model S, are able to do bilinear image interpolation, and smooth filtering, respectively. I really like the blurry, smooth look on my smaller handhelds :)
I've noticed that on the 2.0 beta, there is no bilinear option in RA (only semi-linear in image interpolation). Is there any chance for having bilinear filtering in RA with version 2.0? I don't know how taxing this might be to performance, but seeing that the Model S (which as the same specs as the V90, although with a smaller screen) has a smoothing option, I think it might be worth a shot at asking :)
Thanks for your incredible work!