@thi.ng/color/hcy/hcy-rgb.js

Array-based color types, CSS parsing, conversions, transformations, declarative theme generation, gradients, presets

import { clamp01 } from "@thi.ng/math/interval";
import { setC3 } from "@thi.ng/vectors/setc";
import { __ensureAlpha } from "../internal/ensure.js";
import { luminanceRgb } from "../luminance-rgb.js";
import { hueRgb } from "../rgb/hue-rgb.js";
const hcyRgb = (out, src) => {
  const h = src[0];
  let c = src[1];
  const y = src[2];
  const rgb = hueRgb(out || src, h, __ensureAlpha(src[3]));
  const lum = luminanceRgb(rgb);
  if (y < lum) {
    c *= y / lum;
  } else if (lum < 1) {
    c *= (1 - y) / (1 - lum);
  }
  return setC3(
    rgb,
    clamp01((rgb[0] - lum) * c + y),
    clamp01((rgb[1] - lum) * c + y),
    clamp01((rgb[2] - lum) * c + y)
  );
};
export {
  hcyRgb
};