BitmapReader.Extensions.BitmapExtensions.LoopThroughPixels C# (CSharp) Method

        public static void LoopThroughPixels(this Bitmap bitmap, Action<Point, Color> action)
        {
            Rectangle rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);

            System.Drawing.Imaging.BitmapData bmpData = bitmap.LockBits(
                rect, System.Drawing.Imaging.ImageLockMode.ReadOnly, bitmap.PixelFormat);

            IntPtr ptr = bmpData.Scan0;

            int bytes = bmpData.Stride * bitmap.Height;
            byte[] rgbValues = new byte[bytes];

            Marshal.Copy(ptr, rgbValues, 0, bytes);

            for (int x = 0; x < bitmap.Width; x++)
            {
                for (int y = 0; y < bitmap.Height; y++)
                {
                    int position = (y * bmpData.Stride) + (x * 3);
                    int red = rgbValues[position + 2];
                    int green = rgbValues[position + 1];
                    int blue = rgbValues[position];
                    action.Invoke(new Point(x,y), Color.FromArgb(red, green, blue));
                }
            }
            bitmap.UnlockBits(bmpData);
        }