/// <summary>
/// Converts a WPF HSL color to an RGB color
/// </summary>
/// <param name="hslColor">The HSL color to convert.</param>
/// <returns>An RGB color object equivalent to the HSL color object passed in.</returns>
public static Color HlsToRgb(ColorHls hlsColor)
{
return(HlsToRgb(hlsColor.H, hlsColor.L, hlsColor.S, hlsColor.A));
}
public static ColorHls RgbToHls(Color rgbColor)
{
// Initialize result
var hlsColor = new ColorHls();
// Convert RGB values to percentages
double r = (double)rgbColor.R / 255;
var g = (double)rgbColor.G / 255;
var b = (double)rgbColor.B / 255;
var a = (double)rgbColor.A / 255;
// Find min and max RGB values
var min = Math.Min(r, Math.Min(g, b));
var max = Math.Max(r, Math.Max(g, b));
var delta = max - min;
/* If max and min are equal, that means we are dealing with
* a shade of gray. So we set H and S to zero, and L to either
* max or min (it doesn't matter which), and then we exit. */
//Special case: Gray
if (max == min)
{
hlsColor.H = 0;
hlsColor.S = 0;
hlsColor.L = max;
return hlsColor;
}
/* If we get to this point, we know we don't have a shade of gray. */
// Set L
hlsColor.L = (min + max) / 2;
// Set S
if (hlsColor.L < 0.5)
{
hlsColor.S = delta / (max + min);
}
else
{
hlsColor.S = delta / (2.0 - max - min);
}
// Set H
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;
// Set A
hlsColor.A = a;
// Set return value
return hlsColor;
}
public static ColorHls RgbToHls(Color rgbColor)
{
// Initialize result
var hlsColor = new ColorHls();
// Convert RGB values to percentages
double r = (double)rgbColor.R / 255;
var g = (double)rgbColor.G / 255;
var b = (double)rgbColor.B / 255;
var a = (double)rgbColor.A / 255;
// Find min and max RGB values
var min = Math.Min(r, Math.Min(g, b));
var max = Math.Max(r, Math.Max(g, b));
var delta = max - min;
/* If max and min are equal, that means we are dealing with
* a shade of gray. So we set H and S to zero, and L to either
* max or min (it doesn't matter which), and then we exit. */
//Special case: Gray
if (max == min)
{
hlsColor.H = 0;
hlsColor.S = 0;
hlsColor.L = max;
return(hlsColor);
}
/* If we get to this point, we know we don't have a shade of gray. */
// Set L
hlsColor.L = (min + max) / 2;
// Set S
if (hlsColor.L < 0.5)
{
hlsColor.S = delta / (max + min);
}
else
{
hlsColor.S = delta / (2.0 - max - min);
}
// Set H
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;
}
// Set A
hlsColor.A = a;
// Set return value
return(hlsColor);
}
/// <summary>
/// Converts a WPF HSL color to an RGB color
/// </summary>
/// <param name="hslColor">The HSL color to convert.</param>
/// <returns>An RGB color object equivalent to the HSL color object passed in.</returns>
public static Color HlsToRgb(ColorHls hlsColor)
{
return HlsToRgb(hlsColor.H, hlsColor.L, hlsColor.S, hlsColor.A);
}