HSVColor.fromColor constructor

HSVColor.fromColor(
  1. Color color
)

Creates an HSVColor from an RGB Color.

This constructor does not necessarily round-trip with toColor because of floating point imprecision.

Implementation

factory HSVColor.fromColor(Color color) {
  final double red = color.red / 0xFF;
  final double green = color.green / 0xFF;
  final double blue = color.blue / 0xFF;

  final double max = math.max(red, math.max(green, blue));
  final double min = math.min(red, math.min(green, blue));
  final double delta = max - min;

  final double alpha = color.alpha / 0xFF;
  final double hue = _getHue(red, green, blue, max, delta);
  final double saturation = max == 0.0 ? 0.0 : delta / max;

  return HSVColor.fromAHSV(alpha, hue, saturation, max);
}