Rgba.fromHsla constructor

Rgba.fromHsla(Hsla hsla)

Implementation

factory Rgba.fromHsla(Hsla hsla) {
  // Convert to Rgba.
  // See site <http://easyrgb.com/index.php?X=MATH> for good documentation
  // and color conversion routines.

  var h = hsla.hue;
  var s = hsla.saturation;
  var l = hsla.lightness;
  var a = hsla.alpha;

  int r;
  int g;
  int b;

  if (s == 0) {
    r = (l * 255).round().toInt();
    g = r;
    b = r;
  } else {
    num var2;

    if (l < 0.5) {
      var2 = l * (1 + s);
    } else {
      var2 = (l + s) - (s * l);
    }
    var var1 = 2 * l - var2;

    r = (255 * Rgba._hueToRGB(var1, var2, h + (1 / 3))).round().toInt();
    g = (255 * Rgba._hueToRGB(var1, var2, h)).round().toInt();
    b = (255 * Rgba._hueToRGB(var1, var2, h - (1 / 3))).round().toInt();
  }

  return Rgba(r, g, b, a);
}