using System;
using System.Drawing;

namespace shjxCamera
{
    public class ColorPoint : IComparable<ColorPoint>
    {
        public string Tag { get; set; }
        public int R { get; set; }
        public int G { get; set; }
        public int B { get; set; }
        public int Gray { get; set; }
        public int Hue { get; set; }
        public float Saturation { get; set; }
        public float Brightness { get; set; }

        // 计算色相差
        public static int HueDiff(ColorPoint cp1, ColorPoint cp2)
        {
            int a = cp1.Hue;
            int b = cp2.Hue;
            if (a >= b)
            {
                return Math.Min(a - b, b - a + 360);
            }
            else
            {
                return Math.Min(b - a, a - b + 360);
            }
        }

        public ColorPoint(int r, int g, int b, string tag)
        {
            Tag = tag;
            R = r;
            G = g;
            B = b;
            Gray = Math.Min(255, (int)(R * 0.299 + G * 0.587 + B * 0.114));
            Color color = Color.FromArgb(R, G, B);
            Hue = (int)color.GetHue();
            Saturation = color.GetSaturation();
            Brightness = color.GetBrightness();
        }

        public int CompareTo(ColorPoint obj)
        {
            return Hue - obj.Hue;
        }
    }
}