public byte GetIntensity(int x, int y)
{
if (!IsLocked)
{
LockBits();
}
// Get start index of the specified pixel
int i = (y * Stride) + x * BytesPerPixel;
if (i > _pixelData.Length - BytesPerPixel)
{
throw new IndexOutOfRangeException();
}
if (BitsPerPixel == 32)
{
// Note: Ignoring Alpha (which is index i)
return(ColorExtensions.GetIntensity(_pixelData[i + 3], _pixelData[i + 2], _pixelData[i + 1]));
}
if (BitsPerPixel == 24)
{
return(ColorExtensions.GetIntensity(_pixelData[i + 2], _pixelData[i + 1], _pixelData[i]));
}
if (BitsPerPixel == 8)
{
return(_pixelData[i]);
}
throw new NotImplementedException();
}
