Mixbox for C/C++

Usage

#include <stdio.h>
#include "mixbox.h"

int main() {
  unsigned char r1 =   0, g1 = 33,  b1 = 133; // blue
  unsigned char r2 = 252, g2 = 211, b2 = 0;   // yellow
  float t = 0.5;
  unsigned char r, g, b;

  mixbox_lerp(r1, g1, b1,  // first color
              r2, g2, b2,  // second color
              t,           // mixing ratio
              &r, &g, &b); // result

  printf("%d %d %d\n", r, g, b);
}

Mixing Multiple Colors

mixbox_latent z1, z2, z3, z_mix;

mixbox_rgb_to_latent(r1, g1, b1, z1);
mixbox_rgb_to_latent(r2, g2, b2, z2);
mixbox_rgb_to_latent(r3, g3, b3, z3);

for (int i = 0; i < MIXBOX_LATENT_SIZE; i++) {
  // mix 30% of rgb1, 60% of rgb2, and 10% of rgb3
  z_mix[i] = 0.3f*z1[i] + 0.6f*z2[i] + 0.1f*z3[i];
}

mixbox_latent_to_rgb(z_mix, &r, &g, &b);

Pigment Colors

Pigment		RGB	Float RGB	Linear RGB
Cadmium Yellow		254, 236, 0	0.996, 0.925, 0.0	0.991, 0.839, 0.0
Hansa Yellow		252, 211, 0	0.988, 0.827, 0.0	0.973, 0.651, 0.0
Cadmium Orange		255, 105, 0	1.0, 0.412, 0.0	1.0, 0.141, 0.0
Cadmium Red		255, 39, 2	1.0, 0.153, 0.008	1.0, 0.02, 0.001
Quinacridone Magenta		128, 2, 46	0.502, 0.008, 0.18	0.216, 0.001, 0.027
Cobalt Violet		78, 0, 66	0.306, 0.0, 0.259	0.076, 0.0, 0.054
Ultramarine Blue		25, 0, 89	0.098, 0.0, 0.349	0.01, 0.0, 0.1
Cobalt Blue		0, 33, 133	0.0, 0.129, 0.522	0.0, 0.015, 0.235
Phthalo Blue		13, 27, 68	0.051, 0.106, 0.267	0.004, 0.011, 0.058
Phthalo Green		0, 60, 50	0.0, 0.235, 0.196	0.0, 0.045, 0.032
Permanent Green		7, 109, 22	0.027, 0.427, 0.086	0.002, 0.153, 0.008
Sap Green		107, 148, 4	0.42, 0.58, 0.016	0.147, 0.296, 0.001
Burnt Sienna		123, 72, 0	0.482, 0.282, 0.0	0.198, 0.065, 0.0