public unsafe void XOR()
{
try
{
if ((Current.Width == Prev.Width) && (Current.Height == Prev.Height))
{
int avg = 0;
Data1 = Prev.LockBits(new Rectangle(0, 0, Prev.Width, Prev.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
Data2 = Current.LockBits(new Rectangle(0, 0, Current.Width, Current.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
//BitmapData data3 = result.LockBits(new Rectangle(0, 0, result.Width, result.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
int offset = Data2.Stride - Data2.Width * 4;
byte *ptr1 = (byte *)Data1.Scan0;
byte *ptr2 = (byte *)Data2.Scan0;
//byte* ptr3 = (byte*)data3.Scan0;
for (int y = 0; y < Current.Height; y++)
{
for (int x = 0; x < Current.Width * 4; x++)
{
//http://www.codeproject.com/KB/graphics/quickgrayscale.aspx
//convert pixels to greyscale by averaging the colour components
//Array index 0 is blue, index 1 is green, index 2 is red
avg = (ptr1[0] + ptr1[1] + ptr1[2]) / 3;
ptr1[0] = (byte)avg;
ptr1[1] = (byte)avg;
ptr1[2] = (byte)avg;
avg = (ptr2[0] + ptr2[1] + ptr2[2]) / 3;
ptr2[0] = (byte)avg;
ptr2[1] = (byte)avg;
ptr2[2] = (byte)avg;
//ptr3[0] = (byte)XORCalc(ptr1[0], ptr2[0]);
XORCalc(ptr1[0], ptr2[0]);
ptr1++;
ptr2++;
//ptr3++;
}
ptr1 += offset;
ptr2 += offset;
//ptr3 += offset;
}
Prev.UnlockBits(Data1);
Current.UnlockBits(Data2);
//result.UnlockBits(data3);
}
}
catch (Exception ex)
{
#if DEBUG
Console.Out.WriteLine("XOR Image Processing Error: " + ex.Message);
#endif
Prev.UnlockBits(Data1);
Current.UnlockBits(Data2);
}
}