/// <summary>
/// Multiplies the Color's Saturation, and Luminance or Brightness by the arguments;
/// and optionally specifies the output Alpha.
/// </summary>
/// <param name="color">The color to transform.</param>
/// <param name="colorTransformMode">Transform mode.</param>
/// <param name="saturationTransform">The transformation multiplier.</param>
/// <param name="brightnessTransform">The transformation multiplier.</param>
/// <param name="outputAlpha">Can optionally specify the Alpha to directly
/// set on the output. If null, then the input <paramref name="color"/>
/// Alpha is used.</param>
/// <returns>RGB Color.</returns>
public static Color TransformSaturationAndValue(
Color color,
ColorTransformMode colorTransformMode,
double saturationTransform,
double brightnessTransform,
byte?outputAlpha = null)
{
double[] hsl = colorTransformMode == ColorTransformMode.Hsl
? SimpleColorTransforms.RgbToHsl(color)
: SimpleColorTransforms.RgbToHsb(color);
if ((SystemMath.Abs(hsl[1]) < SimpleColorTransforms.tolerance) &&
(saturationTransform > 1D))
{
hsl[1] = saturationTransform - 1D;
}
else
{
hsl[1] *= saturationTransform;
}
if ((SystemMath.Abs(hsl[2]) < SimpleColorTransforms.tolerance) &&
(brightnessTransform > 1D))
{
hsl[2] = brightnessTransform - 1D;
}
else
{
hsl[2] *= brightnessTransform;
}
return(colorTransformMode == ColorTransformMode.Hsl
? SimpleColorTransforms.HslToRgb(hsl[0], hsl[1], hsl[2], outputAlpha ?? color.A)
: SimpleColorTransforms.HsbToRgb(hsl[0], hsl[1], hsl[2], outputAlpha ?? color.A));
}
private static extern IntPtr CreateMultiProfileTransform(
[In] IntPtr[] profiles,
uint nProfiles,
[In] uint[] intents,
uint nIntents,
ColorTransformMode flags,
uint indexPreferredCmm);
/// <summary>
/// Multiplies the Color's Luminance or Brightness by the argument;
/// and optionally specifies the output Alpha.
/// </summary>
/// <param name="color">The color to transform.</param>
/// <param name="colorTransformMode">Transform mode.</param>
/// <param name="brightnessTransform">The transformation multiplier.</param>
/// <param name="outputAlpha">Can optionally specify the Alpha to directly
/// set on the output. If null, then the input <paramref name="color"/>
/// Alpha is used.</param>
public static Color TransformBrightness(Color color, ColorTransformMode colorTransformMode, double brightnessTransform, byte?outputAlpha = null)
{
double[] hsl = colorTransformMode == ColorTransformMode.Hsl? ColorUtil.RgBtoHsl(color): ColorUtil.RgBtoHsb(color);
if ((Math.Abs(hsl[2]) < ColorUtil.tolerance) && (brightnessTransform > 1D))
{
hsl[2] = brightnessTransform - 1D;
}
else
{
hsl[2] *= brightnessTransform;
}
return(colorTransformMode == ColorTransformMode.Hsl
? ColorUtil.HsLtoRgb(hsl[0], hsl[1], hsl[2], outputAlpha ?? color.A)
: ColorUtil.HsBtoRgb(hsl[0], hsl[1], hsl[2], outputAlpha ?? color.A));
}
internal static IntPtr CreateColorTransform(ref LogColorSpace colorSpace, IntPtr hDestProfile, IntPtr hTargetProfile, ColorTransformMode transformMode)
{
var hTransform = _CreateColorTransform(ref colorSpace, hDestProfile, hTargetProfile, transformMode);
if (hTransform == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
return(hTransform);
}
private static extern IntPtr _CreateColorTransform(
[In] ref LogColorSpace pLogColorSpace,
[In] IntPtr hDestProfile,
[In] IntPtr hTargetProfile,
[In] ColorTransformMode dwFlags);
