hsvToHsl function

HSLColor hsvToHsl(
  1. HSVColor color
)

reference: https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_HSL

Implementation

HSLColor hsvToHsl(HSVColor color) {
  double s = 0.0;
  double l = 0.0;
  l = (2 - color.saturation) * color.value / 2;
  if (l != 0) {
    if (l == 1) {
      s = 0.0;
    } else if (l < 0.5) {
      s = color.saturation * color.value / (l * 2);
    } else {
      s = color.saturation * color.value / (2 - l * 2);
    }
  }
  return HSLColor.fromAHSL(
    color.alpha,
    color.hue,
    s.clamp(0.0, 1.0),
    l.clamp(0.0, 1.0),
  );
}