[C#노트] byte 회전비트맵

public Bitmap Byte2Bitmap(byte[] rawValues, int width, int height)
        {
            //          ，         
            Bitmap bmp = new Bitmap(width, height, PixelFormat.Format8bppIndexed);
            BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, width, height),
                ImageLockMode.WriteOnly, PixelFormat.Format8bppIndexed);

            //      
            int stride = bmpData.Stride; //      
            int offset = stride - width;  //             
            IntPtr iptr = bmpData.Scan0; //   bmpData       
            int scanBytes = stride * height; //  stride  ，           

            //                            
            int posScan = 0, posReal = 0; //           ，          
            byte[] pixelValues = new byte[scanBytes]; ; //         

            for (int x = 0; x < height; x++)
            {
                //             
                for (int y = 0; y < width; y++)
                {
                    pixelValues[posScan++] = rawValues[posReal++];
                }
                posScan += offset; //      ，            “  ” 
            }

            // Marshal Copy  ，               BitmapData 
            System.Runtime.InteropServices.Marshal.Copy(pixelValues, 0, iptr, scanBytes);
            bmp.UnlockBits(bmpData); //        

            //                 ，        
            ColorPalette temPalette;
            using (Bitmap tempBmp = new Bitmap(1, 1, PixelFormat.Format8bppIndexed))
            {
                temPalette = tempBmp.Palette;
            }
            for (int i = 0; i < 256; i++)
            {
                temPalette.Entries[i] = Color.FromArgb(i, i, i);
            }
            bmp.Palette = temPalette;

            return bmp;
        }