[feature request] Screen Filters like Nintendo Switch Online GBA Emulator

[rrrcabral]

nintendo recently added Gameboy Advance to Switch Online, and their emulator screen filter is absolutely BEAUTIFUL! really feels like original hardware, pixels no longer appear square and jagged. is there a possibility to extract this and add in the MGBA something just as good?

[MxSelfDestruct]

mGBA includes several shaders, which can be enabled under Tools -> Settings -> Shaders. On Linux, the shader files are located in /usr/share/mgba.

[endrift]

It cannot be extracted, but it might be able to be reproduced. However, I don't have NSO+ so I can't even eyeball it directly like I did when writing the AGB-001 and AGS-001 shades.

[rrrcabral]

this talks out the shader: https://www.polygon.com/guides/23593050/game-boy-advance-nintendo-switch-online-filter-classic-feel

here is a screenshot that i've made from 'WarioWare, Inc.: Mega Microgames': https://www.imagebam.com/view/MEJQ3MY

[rrrcabral]

the Ares emulator(emulator of Wonderswan and NeoGeoPocket) also has a beautiful shader called "phosphorish" that looks like a real screen too

[profi200]

The filters which reproduce the AGB-001 colors the closest are these: https://forums.libretro.com/t/real-gba-and-ds-phat-colors/1540/220 Specifically the "gba-color" shader. Comparison i made a few weeks ago (no color correction vs. gba-color).

The ones Nintendos GBA emu uses on Switch are a trade off between reproducing the colors and saturation if i understand right. So they are by no means accurate. Pokefan531 is trying to reproduce these filters anyway but the current implementation is not completely right yet according to his posts.

[endrift]

I've ported pokefan531's shader over