/// <summary> /// Toggles brightness between light mode and dark mode. /// </summary> /// <param name="value">The source color value collection.</param> /// <param name="level">The relative saturation level.</param> /// <returns>The color toggled.</returns> public static IEnumerable <Color> ToggleBrightness(IEnumerable <Color> value, RelativeBrightnessLevels level) => value?.Select(ele => ToggleBrightness(ele));
/// <summary>
/// Toggles brightness between light mode and dark mode.
/// </summary>
/// <param name="value">The source color value.</param>
/// <param name="level">The relative saturation level.</param>
/// <returns>The color toggled.</returns>
public static Color ToggleBrightness(Color value, RelativeBrightnessLevels level)
{
var max = Maths.Arithmetic.Max(value.R, value.G, value.B);
var min = Maths.Arithmetic.Min(value.R, value.G, value.B);
var high = 255 - max;
var delta = high - min;
switch (level)
{
case RelativeBrightnessLevels.Switch:
break;
case RelativeBrightnessLevels.High:
if (high <= min)
{
return(value);
}
break;
case RelativeBrightnessLevels.Low:
if (high >= min)
{
return(value);
}
break;
case RelativeBrightnessLevels.Middle:
{
if (high == min)
{
return(value);
}
return(Color.FromArgb(
value.A,
ToChannel(value.R + delta / 2f),
ToChannel(value.G + delta / 2f),
ToChannel(value.B + delta / 2f)));
}
case RelativeBrightnessLevels.Exposure:
if (high == 0)
{
return(value);
}
delta = high;
break;
case RelativeBrightnessLevels.Shadow:
if (min == 0)
{
return(value);
}
delta = -min;
break;
default:
return(value);
}
return(Color.FromArgb(value.A, value.R + delta, value.G + delta, value.B + delta));
}