/// <summary>
/// Applies this LightnessFilter to a Bitmap
/// </summary>
/// <param name="bitmap">The bitmap to apply this LightnessFilter to</param>
public unsafe void ApplyToBitmap(Bitmap bitmap)
{
//
// !!! ATENTION: UNSAFE POINTER HANDLING !!!
// !!! WATCH IT WHEN MESSING WITH THIS METHOD !!!
//
if (!Modifying || bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
return;
}
// Lock the bitmap
BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);
int *scan0 = (int *)data.Scan0;
int count = bitmap.Width * bitmap.Height;
float lightF = Lightness / 100.0f;
while (count-- > 0)
{
AhslColor ahsl = AhslColor.FromArgb(*scan0);
float l;
if (Multiply)
{
l = ahsl.Lf * lightF;
}
else
{
l = (Relative ? ahsl.Lf + lightF : lightF);
}
*(scan0++) = new AhslColor(ahsl.Af, ahsl.Hf, ahsl.Sf, l).ToArgb();
}
bitmap.UnlockBits(data);
}
/// <summary>
/// Gets a color with the current active component set to be of the given value
/// </summary>
/// <param name="componentValue">The component value, ranging from [0 - 1]</param>
/// <returns>A color with the current active component set to be of the given value</returns>
protected Color GetColorWithActiveComponentSet(float componentValue)
{
AhslColor retColor = activeColor;
switch (ColorComponent)
{
// Global alpha channel
case ColorSliderComponent.Alpha:
retColor = new AhslColor(componentValue, retColor.Hf, retColor.Sf, retColor.Lf);
break;
// RGB
case ColorSliderComponent.Red:
retColor = AhslColor.FromArgb(retColor.Af, componentValue, retColor.Gf, retColor.Bf);
break;
case ColorSliderComponent.Green:
retColor = AhslColor.FromArgb(retColor.Af, retColor.Rf, componentValue, retColor.Bf);
break;
case ColorSliderComponent.Blue:
retColor = AhslColor.FromArgb(retColor.Af, retColor.Rf, retColor.Gf, componentValue);
break;
// HSL
case ColorSliderComponent.Hue:
retColor = new AhslColor(retColor.Af, componentValue, retColor.Sf, retColor.Lf);
break;
case ColorSliderComponent.Saturation:
retColor = new AhslColor(retColor.Af, retColor.Hf, componentValue, retColor.Lf);
break;
case ColorSliderComponent.Lightness:
retColor = new AhslColor(retColor.Af, retColor.Hf, retColor.Sf, componentValue);
break;
}
if (IgnoreActiveColorAlpha())
{
retColor = new AhslColor(1.0f, retColor.Hf, retColor.Sf, retColor.Lf);
}
/*switch (ColorComponent)
* {
* // Global alpha channel
* case ColorSliderComponent.Alpha:
* retColor.Af = componentValue;
* break;
*
* // RGB
* case ColorSliderComponent.Red:
* retColor = AhslColor.FromArgb(retColor.Af, componentValue, retColor.Gf, retColor.Bf);
* break;
* case ColorSliderComponent.Green:
* retColor = AhslColor.FromArgb(retColor.Af, retColor.Rf, componentValue, retColor.Bf);
* break;
* case ColorSliderComponent.Blue:
* retColor = AhslColor.FromArgb(retColor.Af, retColor.Rf, retColor.Gf, componentValue);
* break;
*
* // HSL
* case ColorSliderComponent.Hue:
* retColor.Hf = componentValue;
* break;
* case ColorSliderComponent.Saturation:
* retColor.Sf = componentValue;
* break;
* case ColorSliderComponent.Lightness:
* retColor.Lf = componentValue;
* break;
* }
*
* if (IgnoreActiveColorAlpha())
* {
* retColor.Af = 1.0f;
* }*/
return(retColor.ToColor());
}
/// <summary>
/// Initializes a new instance of the ColorChangedEventArgs class
/// </summary>
/// <param name="oldColor">The original color before the component was updated</param>
/// <param name="newColor">The new color after the component was updated</param>
/// <param name="componentChanged">The color component that was modified</param>
public ColorChangedEventArgs(AhslColor oldColor, AhslColor newColor, ColorSliderComponent componentChanged)
{
OldColor = oldColor;
NewColor = newColor;
ComponentChanged = componentChanged;
}
