protected override void FromRgb(Rgb color)
{
var xyz = color.ToColorSpace <Xyz>();
var x = xyz.X / Xyz.WhiteReference[0];
var y = xyz.Y / Xyz.WhiteReference[1];
var z = xyz.Z / Xyz.WhiteReference[2];
x = x > Xyz.Epsilon ? CubicRoot(x) : (Xyz.Kappa * x + 16) / 116;
y = y > Xyz.Epsilon ? CubicRoot(y) : (Xyz.Kappa * y + 16) / 116;
z = z > Xyz.Epsilon ? CubicRoot(z) : (Xyz.Kappa * z + 16) / 116;
L = System.Math.Max(0, 116 * y - 16);
A = 500 * (x - y);
B = 200 * (y - z);
}
protected override void FromRgb(Rgb color)
{
var r = color.R / 255.0;
var g = color.G / 255.0;
var b = color.B / 255.0;
r = (r > 0.04045 ? System.Math.Pow((r + 0.055) / 1.055, 2.4) : r / 12.92) * 100.0;
g = (g > 0.04045 ? System.Math.Pow((g + 0.055) / 1.055, 2.4) : g / 12.92) * 100.0;
b = (b > 0.04045 ? System.Math.Pow((b + 0.055) / 1.055, 2.4) : b / 12.92) * 100.0;
// TODO: Hard-coded to use sRGB. Update to allow multiple working spaces
X = r * RgbXyzMatrix.SRgb[0, 0] + g * RgbXyzMatrix.SRgb[0, 1] + b * RgbXyzMatrix.SRgb[0, 2];
Y = r * RgbXyzMatrix.SRgb[1, 0] + g * RgbXyzMatrix.SRgb[1, 1] + b * RgbXyzMatrix.SRgb[1, 2];
Z = r * RgbXyzMatrix.SRgb[2, 0] + g * RgbXyzMatrix.SRgb[2, 1] + b * RgbXyzMatrix.SRgb[2, 2];
}
protected override void FromRgb(Rgb color)
{
var xyz = color.ToColorSpace <Xyz>();
var y = xyz.Y / Xyz.WhiteReference[1];
L = y > Xyz.Epsilon ? 116.0 * System.Math.Pow(y, 1.0 / 3.0) - 16.0 : Xyz.Kappa * y;
var targetDenominator = xyz.X + 15.0 * xyz.Y + 3.0 * xyz.Z;
var referenceDenominator = Xyz.WhiteReference[0] + 15.0 * Xyz.WhiteReference[1] + 3.0 * Xyz.WhiteReference[2];
var xTarget = targetDenominator.Equals(0)
? 0
: 4.0 * xyz.X / targetDenominator - 4.0 * Xyz.WhiteReference[0] / referenceDenominator;
var yTarget = targetDenominator.Equals(0)
? 0
: 9.0 * xyz.Y / targetDenominator - 9.0 * Xyz.WhiteReference[1] / referenceDenominator;
U = 13.0 * L * xTarget;
V = 13.0 * L * yTarget;
}
public Yxy(Rgb color)
{
FromRgb(color);
}
public Luv(Rgb color)
{
FromRgb(color);
}
public Cmy(Rgb color)
{
FromRgb(color);
}
protected override void FromRgb(Rgb color)
{
C = 1 - color.R / 255.0;
M = 1 - color.G / 255.0;
Y = 1 - color.B / 255.0;
}
public HunterLab(Rgb color)
{
FromRgb(color);
}
public Hsv(Rgb color)
{
FromRgb(color);
}
public static ColorSpace FromXElement(XElement element)
{
if (element.Name != "ColorSpace")
{
throw new XmlException("XElement name must be \"ColorSpace\"");
}
switch (element.Attribute("Type").Value)
{
case "CMY":
{
var result = new Cmy();
result.FromXNode(element);
return(result);
}
case "CMYK":
{
var result = new Cmyk();
result.FromXNode(element);
return(result);
}
case "HSL":
{
var result = new Hsl();
result.FromXNode(element);
return(result);
}
case "HSV":
{
var result = new Hsv();
result.FromXNode(element);
return(result);
}
case "HunterLAB":
{
var result = new HunterLab();
result.FromXNode(element);
return(result);
}
case "LAB":
{
var result = new Lab();
result.FromXNode(element);
return(result);
}
case "LCH":
{
var result = new Lch();
result.FromXNode(element);
return(result);
}
case "LUV":
{
var result = new Luv();
result.FromXNode(element);
return(result);
}
case "RGB":
{
var result = new Rgb();
result.FromXNode(element);
return(result);
}
case "RGBA":
{
var result = new Rgba();
result.FromXNode(element);
return(result);
}
case "XYZ":
{
var result = new Xyz();
result.FromXNode(element);
return(result);
}
case "YXY":
{
var result = new Yxy();
result.FromXNode(element);
return(result);
}
default:
throw new ArgumentException("Unrecognized ColorSpace type");
}
}
protected abstract void FromRgb(Rgb color);
public Lch(Rgb color)
{
FromRgb(color);
}
public Lab(Rgb color)
{
FromRgb(color);
}
protected override void FromRgb(Rgb color)
{
R = color.R;
G = color.G;
B = color.B;
}