正片反冲效果的C解释

Photoshop

• 正片反冲效果的C解释

public unsafe void 反色(Bitmap bmp)
        {
            int w = bmp.Width, h = bmp.Height;
            BitmapData data = bmp.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
            byte* p = (byte*)data.Scan0;
            Action<int> action = Y =>
            {
                byte* py = p + Y * data.Stride;
                for (int X = 0; X < w; X++)
                {
                    *py = (byte)~*py;
                    py++;
                    *py = (byte)~*py;
                    py++;
                    *py = (byte)~*py;
                    py++;
                    py++;
                }
            };
            Parallel.For(0, h, action);
            bmp.UnlockBits(data);
        }