static int rgb(int r, int g, int b) {
const double k = (256.0/6.0);
r = R_DIM (r/k, 0, 6);
g = R_DIM (g/k, 0, 6);
b = R_DIM (b/k, 0, 6);
return 16 + (r*36) + (g*6) + b;
}
static int rgb(int r, int g, int b) {
const double k = (255/6);
r = R_DIM (r/k, 0, 5);
g = R_DIM (g/k, 0, 5);
b = R_DIM (b/k, 0, 5);
return 16 + ((r&7)*29) + ((g&7)*12) + (b&7);
}
R_API void r_cons_color (int fg, int r, int g, int b) {
int k;
r = R_DIM (r, 0, 255);
g = R_DIM (g, 0, 255);
b = R_DIM (b, 0, 255);
if (r == g && g == b) { // b&w
k = 232 + (int)(((r+g+b)/3)/10.3);
} else {
r = (int)(r/42.6);
g = (int)(g/42.6);
b = (int)(b/42.6);
k = 16 + (r*36) + (g*6) + b;
}
r_cons_printf ("\x1b[%d;5;%dm", fg? 48: 38, k);
}