public static bool Saturation(ref Bitmap bmp, double percent)
{
double level = 1.0 + percent / 100;
double baseF = 1.0 - level;
double rF = 0.3086 * baseF;
double gF = 0.6094 * baseF;
double bF = 0.0820 * baseF;
P2PFunc func = new P2PFunc(SaturationFunc);
return P2PCore(ref bmp, func, rF, gF, bF, level, 0, 0, 0);
}
public static bool Luminance(ref Bitmap bmp, int percent)
{
double ll = 255d * percent / 100;
P2PFunc func = new P2PFunc(LuminanceFunc);
return P2PCore(ref bmp, func, ll);
}
public static bool P2PCore(ref Bitmap bmp, P2PFunc func, params double[] param)
{
if (bmp.PixelFormat != PixelFormat.Format24bppRgb)
return false;
int w = bmp.Width;
int h = bmp.Height;
byte r, g, b;
int ir;
BmpProc24 bd = new BmpProc24(bmp);
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++)
{
ir = bd.IndexR(x, y);
r = bd[ir]; g = bd[ir - 1]; b = bd[ir - 2];
func(ref r, ref g, ref b, param);
bd[ir] = r; bd[ir - 1] = g; bd[ir - 2] = b;
}
bd.Dispose();
return true;
}
public static bool Hue(ref Bitmap bmp, int angle)
{
if ((angle < -359) | (angle > 359)) return false;
P2PFunc func = new P2PFunc(HueFunc);
return P2PCore(ref bmp, func, angle);
}
public static bool Invert(ref Bitmap bmp)
{
P2PFunc func = new P2PFunc(InvertFunc);
return P2PCore(ref bmp, func);
}
public static bool GrayScale24(ref Bitmap bmp)
{
P2PFunc func = new P2PFunc(GrayScale24Func);
return P2PCore(ref bmp, func);
}
public static bool Gamma(ref Bitmap bmp, double dGamma)
{
double[] gammaf = new double[256];
for (int i = 0; i < 256; i++)
gammaf[i] = Math.Min(255.0,
Math.Pow((double)(i / 255.0), (1.0 / dGamma)) * 255 + 0.5);
P2PFunc func = new P2PFunc(GammaFunc);
return P2PCore(ref bmp, func, gammaf);
}
public static bool Contrast(ref Bitmap bmp, double factor)
{
if ((factor > 1) || (factor < -1)) return false;
double value = (1 + factor) * (1 + factor);
double[] d = new double[256];
for (int i = 0; i < 256; i++)
d[i] = AdjustByte((i - 127.5) * value + 127.5);
P2PFunc func = new P2PFunc(ContrastFunc);
return P2PCore(ref bmp, func, d);
}
public static bool ColorFilter(ref Bitmap bmp,
double fRed, double fGreen, double fBlue)
{
P2PFunc func = new P2PFunc(ColorFilterFunc);
return P2PCore(ref bmp, func, fRed, fGreen, fBlue);
}
public static bool Brightness(ref Bitmap bmp, double factor)
{
if ((factor < 0) || (factor > 2)) return false;
factor = (factor - 1) * 255;
P2PFunc func = new P2PFunc(BrightnessFunc);
return P2PCore(ref bmp, func, factor);
}
