Pixel-Composer/shaders/sh_colours_replace/sh_colours_replace.fsh
2023-07-23 20:21:35 +02:00

32 lines
577 B
GLSL

//
// Simple passthrough fragment shader
//
varying vec2 v_vTexcoord;
varying vec4 v_vColour;
uniform vec4 colorFrom[64];
uniform int colorFromAmount;
uniform vec4 colorTo[64];
uniform int colorToAmount;
uniform int useMask;
uniform sampler2D mask;
void main() {
vec4 p = texture2D( gm_BaseTexture, v_vTexcoord );
int index = 0;
float minDist = 999.;
for(int i = 0; i < colorFromAmount; i++ ) {
float dist = distance(p.rgb, colorFrom[i].rgb);
if(dist < minDist) {
minDist = dist;
index = i;
}
}
gl_FragColor = vec4(colorTo[index].rgb, p.a);
}