private static Tuple<ColorRGB, string> SafeConvert(ColorRGBFull rgb, ColorRGB result)
{
if (IsOutside(rgb))
{
return Tuple.Create(result, $"Cannot convert colors. Approximated by ({result.R}, {result.G}, {result.B})");
}
return Tuple.Create(result, string.Empty);
}
public static Tuple<ColorRGB, string> ToRGBFromXYZ(ColorRGBFull rgb)
{
var result = Colors.ToRGBFromXYZ(rgb);
return SafeConvert(rgb, result);
}
private static bool IsOutside(ColorRGBFull rgb)
{
return
(rgb.R + Epsilon) < 0 ||
(rgb.G + Epsilon) < 0 ||
(rgb.B + Epsilon) < 0 ||
(rgb.R - Epsilon) > 1 ||
(rgb.G - Epsilon) > 1 ||
(rgb.B - Epsilon) > 1;
}
public static ColorXYZFull ToXYZ(ColorRGBFull rgb)
{
var r = InverseGammaCorrection(rgb.R);
var g = InverseGammaCorrection(rgb.G);
var b = InverseGammaCorrection(rgb.B);
var xyz = Multiply(RGBToXYZ, r, g, b);
return new ColorXYZFull(xyz.R, xyz.G, xyz.B);
}
public static Tuple<ColorHSVFull, string> ToHSVFromXYZ(ColorRGBFull rgb)
{
var result = Colors.ToHSVFromXYZ(rgb);
if (IsOutside(rgb))
{
return Tuple.Create(result, $"Cannot convert colors. Approximated by ~({result.Hue:##0.000}, {result.Saturation:0.000}, {result.Value:0.000})");
}
return Tuple.Create(result, string.Empty);
}
public static ColorRGB ToRGBFromXYZ(ColorRGBFull rgb)
{
var r = Clamp(rgb.R);
var g = Clamp(rgb.G);
var b = Clamp(rgb.B);
r = GammaCorrect(r);
g = GammaCorrect(g);
b = GammaCorrect(b);
r *= ColorRGB.MaxValue;
g *= ColorRGB.MaxValue;
b *= ColorRGB.MaxValue;
return new ColorRGB((int)Math.Round(r), (int)Math.Round(g), (int)Math.Round(b));
}
public static ColorRGB ToRGBFromXYZUniform(ColorRGBFull rgb)
{
var r = Clamp(rgb.R / 100.0);
var g = Clamp(rgb.G / 100.0);
var b = Clamp(rgb.B / 100.0);
var max = Math.Max(r, Math.Max(g, b));
r /= max;
g /= max;
b /= max;
r = GammaCorrect(r);
g = GammaCorrect(g);
b = GammaCorrect(b);
r *= ColorRGB.MaxValue;
g *= ColorRGB.MaxValue;
b *= ColorRGB.MaxValue;
return new ColorRGB((int)Math.Round(r), (int)Math.Round(g), (int)Math.Round(b));
}
public static ColorRGB ToRGB(ColorRGBFull rgb)
{
var r = Math.Round(Clamp(rgb.R) * ColorRGB.MaxValue);
var g = Math.Round(Clamp(rgb.G) * ColorRGB.MaxValue);
var b = Math.Round(Clamp(rgb.B) * ColorRGB.MaxValue);
return new ColorRGB((int)r, (int)g, (int)b);
}
public static ColorHSVFull ToHSVFromXYZ(ColorRGBFull rgb)
{
var r = Clamp(rgb.R);
var g = Clamp(rgb.G);
var b = Clamp(rgb.B);
r = GammaCorrect(r);
g = GammaCorrect(g);
b = GammaCorrect(b);
return ToHSV(new ColorRGBFull(r, g, b));
}
public static ColorHSVFull ToHSV(ColorRGBFull rgb)
{
var min = Math.Min(rgb.R, Math.Min(rgb.G, rgb.B));
var max = Math.Max(rgb.R, Math.Max(rgb.G, rgb.B));
if (min == max)
{
return new ColorHSVFull(0, 0, min);
}
else
{
var f =
rgb.R == min ? rgb.G - rgb.B :
rgb.G == min ? rgb.B - rgb.R :
rgb.R - rgb.G;
var i =
rgb.R == min ? 3 :
rgb.G == min ? 5 :
1;
var hue = (i - f / (max - min)) * 60.0 % 360.0;
var saturation = (max - min) / max;
var value = max;
return new ColorHSVFull(hue, saturation, value);
}
}
public static uint GetBytes(ColorRGBFull rgb)
{
return GetBytes(ToRGB(rgb));
}
public static ColorRGBFull Clamp(ColorRGBFull rgb)
{
var r = Clamp(rgb.R);
var g = Clamp(rgb.G);
var b = Clamp(rgb.B);
return new ColorRGBFull(r, g, b);
}
