public static Color HlsToRgb(HlsColor hlsColor)
{
var rgbColor = new Color();
if (hlsColor.S == 0)
{
rgbColor = Color.FromArgb((int)(hlsColor.A * 255), (int)(hlsColor.L * 255), (int)(hlsColor.L * 255),
(int)(hlsColor.L * 255));
return(rgbColor);
}
double t1;
if (hlsColor.L < 0.5)
{
t1 = hlsColor.L * (1.0 + hlsColor.S);
}
else
{
t1 = hlsColor.L + hlsColor.S - (hlsColor.L * hlsColor.S);
}
double t2 = 2.0 * hlsColor.L - t1;
double h = hlsColor.H / 360;
double tR = h + (1.0 / 3.0);
double r = SetColor(t1, t2, tR);
double tG = h;
double g = SetColor(t1, t2, tG);
double tB = h - (1.0 / 3.0);
double b = SetColor(t1, t2, tB);
rgbColor = Color.FromArgb((int)(hlsColor.A * 255), (int)(r * 255), (int)(g * 255), (int)(b * 255));
return(rgbColor);
}
public static HlsColor RgbToHls(Color rgbColor)
{
var hlsColor = new HlsColor();
double r = (double)rgbColor.R / 255;
double g = (double)rgbColor.G / 255;
double b = (double)rgbColor.B / 255;
double a = (double)rgbColor.A / 255;
double min = Math.Min(r, Math.Min(g, b));
double max = Math.Max(r, Math.Max(g, b));
double delta = max - min;
if (max == min)
{
hlsColor.H = 0;
hlsColor.S = 0;
hlsColor.L = max;
return(hlsColor);
}
hlsColor.L = (min + max) / 2;
if (hlsColor.L < 0.5)
{
hlsColor.S = delta / (max + min);
}
else
{
hlsColor.S = delta / (2.0 - max - min);
}
if (r == max)
{
hlsColor.H = (g - b) / delta;
}
if (g == max)
{
hlsColor.H = 2.0 + (b - r) / delta;
}
if (b == max)
{
hlsColor.H = 4.0 + (r - g) / delta;
}
hlsColor.H *= 60;
if (hlsColor.H < 0)
{
hlsColor.H += 360;
}
hlsColor.A = a;
return(hlsColor);
}
public static Color ApplyTintToRgb(Color color, double tint)
{
HlsColor rgbToHls = RgbToHls(color);
rgbToHls.L = ApplyTintToLum(tint, (float)rgbToHls.L * 255) / 255;
Color hlsToRgb = HlsToRgb(rgbToHls);
return(hlsToRgb);
}
