Custom PPSSPP shaders

[LunaMoo]

Just added "Shadeboost" shader to it, should be what you're looking for @vsub :3 in case you want only that, all other shaders can be disabled easily, just edit .fsh which has all the options at the start of the file.
Shadeboost basically allows change of:
-saturation,
-brightness,
-contrast.
As well as changing rgb color intensity.:3
Edit: blah that shadeboost had a bug with color channels (misleading code comments ~ blah;p) /fixed now