Custom PPSSPP shaders

[LunaMoo]

Color reduction is pretty easy, but nothing fun to see there.
Here:

Code:

#define Red 5.0
#define Green 6.0
#define Blue 5.0

#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif

uniform sampler2D sampler0;
varying vec2 v_texcoord0;

void main() {
    vec3 color = texture2D(sampler0, v_texcoord0.xy).xyz;
    vec3 color_resolution = vec3(Red, Green, Blue);
    vec3 color_bands = floor(color * color_resolution) / (color_resolution - 1.0);
    gl_FragColor.rgb = min(color_bands, 1.0);
    gl_FragColor.a = 1.0;
}

That should result in standard hi color / 16 bit, you can mess around RGB values pretty easily to get different reduction.