private void CalculateSaturationBrush()
{
LinearGradientBrush linearGradientBrush = new LinearGradientBrush();
linearGradientBrush.StartPoint = new Point(0, 0);
linearGradientBrush.EndPoint = new Point(1, 0);
GradientStop startGS = new GradientStop();
HSL hsl = new HSL(Hue, 0, 0.5);
RGB rgb = ColorModelConverter.HSLtoRGB(hsl);
startGS.Color = new Color()
{
R = (byte)rgb.Red, G = (byte)rgb.Green, B = (byte)rgb.Blue, A = 255
};
startGS.Offset = 0.0;
linearGradientBrush.GradientStops.Add(startGS);
GradientStop endGS = new GradientStop();
hsl = new HSL(Hue, 1, 0.5);
rgb = ColorModelConverter.HSLtoRGB(hsl);
endGS.Color = new Color()
{
R = (byte)rgb.Red, G = (byte)rgb.Green, B = (byte)rgb.Blue, A = 255
};
endGS.Offset = 1.0;
linearGradientBrush.GradientStops.Add(endGS);
SaturationBrush = linearGradientBrush;
}
public void Process()
{
Image.Source = backupImage.Source;
foreach (Transform transform in transforms)
{
TransformedBitmap tb = new TransformedBitmap();
tb.BeginInit();
tb.Source = (BitmapSource)Image.Source;
tb.Transform = transform;
tb.EndInit();
Image.Source = tb;
}
WriteableBitmap source = new WriteableBitmap((BitmapSource)Image.Source);
WriteableBitmap dest = new WriteableBitmap((BitmapSource)Image.Source);
try
{
dest.Lock();
unsafe
{
IntPtr sourceBuffer = source.BackBuffer;
IntPtr destBuffer = dest.BackBuffer;
byte * sourcepbuffer = (byte *)sourceBuffer.ToPointer();
byte * destpbuffer = (byte *)destBuffer.ToPointer();
int Stride = dest.BackBufferStride;
int height = dest.PixelHeight;
Parallel.For(0, dest.PixelWidth, x =>
{
for (int y = 0; y < height; y++)
{
int loc = y * Stride + x * 4;
RGB rgb = new RGB();
rgb.Blue = sourcepbuffer[loc];
rgb.Green = sourcepbuffer[loc + 1];
rgb.Red = sourcepbuffer[loc + 2];
HSL hsl = ColorModelConverter.RGBtoHSL(rgb);
SetHue(hsl);
SetLightness(hsl);
SetSaturation(hsl);
rgb = ColorModelConverter.HSLtoRGB(hsl);
SetContrast(rgb);
destpbuffer[loc] = rgb.Blue;
destpbuffer[loc + 1] = rgb.Green;
destpbuffer[loc + 2] = rgb.Red;
}
});
dest.AddDirtyRect(new Int32Rect(0, 0, dest.PixelWidth, dest.PixelHeight));
}
}
finally
{
dest.Unlock();
}
Image.Source = dest;
}