private static double GetRelativeUnit(double amount, ColorFunctionUnits units)
{
switch (units)
{
case ColorFunctionUnits.Relative:
return(amount);
case ColorFunctionUnits.Percentage:
return(amount / 100.0);
default:
throw new ArgumentOutOfRangeException(nameof(units));
}
}
public static HsvColor FadeIn(HsvColor hsv, double amount, ColorFunctionUnits units)
{
hsv.Alpha = ChannelOperation(FunctionKind.Increase, hsv.Alpha, amount, units);
return(hsv);
}
public static RgbColor Desaturate(RgbColor rgb, double amount, ColorFunctionUnits units)
{
return(Desaturate(rgb.ToHslColor(), amount, units).ToRgbColor());
}
public static HsvColor Desaturate(HsvColor hsv, double amount, ColorFunctionUnits units)
{
hsv.Saturation = ChannelOperation(FunctionKind.Decrease, hsv.Saturation, amount, units);
return(hsv);
}
public static HsvColor Darken(HsvColor hsv, double amount, ColorFunctionUnits units)
{
return(Darken(hsv.ToHslColor(), amount, units).ToHsvColor());
}
public static HslColor Darken(HslColor hsl, double amount, ColorFunctionUnits units)
{
hsl.Lightness = ChannelOperation(FunctionKind.Decrease, hsl.Lightness, amount, units);
return(hsl);
}
private static double ChannelOperation(FunctionKind functionKind, double channel, double amount, ColorFunctionUnits units)
{
switch (units)
{
case ColorFunctionUnits.Absolute:
return(CalculateFunction(functionKind, channel, amount));
case ColorFunctionUnits.Relative:
return(CalculateFunction(functionKind, channel, channel * amount));
case ColorFunctionUnits.Percentage:
return(CalculateFunction(functionKind, channel, channel * amount / 100.0));
default:
throw new ArgumentOutOfRangeException(nameof(units));
}
}
public static HsvColor Tint(HsvColor color, double amount, ColorFunctionUnits units)
{
return(Mix(RgbWhite, (RgbColor)color, GetRelativeUnit(amount, units)));
}
public static HsvColor Shade(HsvColor color, double amount, ColorFunctionUnits units)
{
return(Mix(RgbBlack, (RgbColor)color, GetRelativeUnit(amount, units)));
}
public static HslColor Saturate(HslColor hsl, double amount, ColorFunctionUnits units)
{
hsl.Saturation = ChannelOperation(FunctionKind.Increase, hsl.Saturation, amount, units);
return(hsl);
}
public static RgbColor Lighten(RgbColor rgb, double amount, ColorFunctionUnits units)
{
return(Lighten(rgb.ToHslColor(), amount, units).ToRgbColor());
}
public static RgbColor FadeOut(RgbColor rgb, double amount, ColorFunctionUnits units)
{
rgb.A = ChannelOperation(FunctionKind.Decrease, rgb.A, amount, units);
return(rgb);
}
public static HslColor FadeOut(HslColor hsl, double amount, ColorFunctionUnits units)
{
hsl.Alpha = ChannelOperation(FunctionKind.Decrease, hsl.Alpha, amount, units);
return(hsl);
}
