Code Scraps Bitmap GDI+ Interop

using System;
using System.Collections.Generic;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using klManagedImaging;
using System.Drawing;

//Quite Literally - scraps 
//Scraps of Bitmap Interop GDI+ code I did not want to loose.

namespace ImageInterop
{
 [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern int BitBlt(IntPtr hdcDst, int xDst, int yDst, int w, int h, IntPtr hdcSrc, int xSrc, int ySrc, int rop);
        static int SRCCOPY = 0x00CC0020;

        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern bool DeleteObject(IntPtr hObject);

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern int InvalidateRect(IntPtr hwnd, IntPtr rect, int bErase);

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern IntPtr GetDC(IntPtr hwnd);

        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleDC(IntPtr hdc);

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern int ReleaseDC(IntPtr hwnd, IntPtr hdc);

        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern int DeleteDC(IntPtr hdc);

        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);

        [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)]
        public struct BITMAPINFO
        {
            public uint biSize;
            public int biWidth, biHeight;
            public short biPlanes, biBitCount;
            public uint biCompression, biSizeImage;
            public int biXPelsPerMeter, biYPelsPerMeter;
            public uint biClrUsed, biClrImportant;
            [System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 256)]
            public uint[] cols;
        }

        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        static extern IntPtr CreateDIBSection(IntPtr hdc, ref BITMAPINFO bmi, uint Usage, out IntPtr bits, IntPtr hSection, uint dwOffset);
        static uint BI_RGB = 0;
        static uint DIB_RGB_COLORS = 0;
        static uint MAKERGB(int r, int g, int b)
        {
            return ((uint)(b & 255)) | ((uint)((r & 255) << 8)) | ((uint)((g & 255) << 16));
        }


        private void SomeBitmapCode()
        {
            int width = 512;
            int height = 1024;
            int bands = 1;

            Bitmap bmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format8bppIndexed);
            System.Drawing.Imaging.BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
            int stride = bmpData.Stride;
            byte[] rgbValues = new byte[stride* bmp.Height];
            Double[,] greyVal = mat.ToArray( ); 
            int rgbIndexer=0;
            int strideJumpBytes = (stride  - width);
            for (int x = 0; x < greyVal.GetLength(0); x += 1)
            {
                Vector row = mat.RowVector(x);
                for (int y = 0; y < greyVal.GetLength(1); y += 1)
                {
                   rgbValues[rgbIndexer]=  (byte)row[y];
                   rgbIndexer += 1;
                  
                }
                rgbIndexer += strideJumpBytes;
            }     
            
            IntPtr ptr = bmpData.Scan0;
            System.Drawing.Imaging.ColorPalette myPal=bmp.Palette;
            int ncols = 256;
            Color[] colArray = new Color[ncols];
             for (int i = 0; i < ncols; i++) 
            {
                uint col=  MAKERGB(i, i, i);
                System.Drawing.Color myCol =Color.FromArgb( 0, (int)col, (int)col,(int) col );
                 myPal.Entries[i] = myCol;
            }
            bmp.Palette = myPal;

            System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, stride * bmp.Height);
            bmp.UnlockBits(bmpData);
            pictureBox1.Image = bmp;
            bmp.Save("c:/temp/gaussianBitmap.jpg");
             
        }

    class TestManagedImageing
    {
        static void test(string[] args)
        {
            Bitmap img = new Bitmap("C:\\temp\\img.jpg");
            int x0=0;
            int y0=0;
            int w=img.Width;
            int h=img.Height;
            String id = "img";
            System.Drawing.Imaging.PixelFormat format= img.PixelFormat;
            Rectangle rect= new Rectangle(0, 0,w, h);
	        BitmapData bmd=img.LockBits(rect,System.Drawing.Imaging.ImageLockMode.ReadWrite, format);
	        IntPtr data = bmd.Scan0;
	        int bytes = img.Width * img.Height * 3;
		    byte[] _imageBuffer = new byte[bytes];
            IntPtr bmpdata = new IntPtr();
            bmpdata =bmd.Scan0;
		    System.Runtime.InteropServices.Marshal.Copy( bmpdata, _imageBuffer, 0, bytes );
		    img.Save("c:/temp/ippManaged_ProcessedImage.jpg",	System.Drawing.Imaging.ImageFormat.Jpeg);
		    img.UnlockBits( bmd);
	        klImageTile tile = new klImageTile(x0, y0, w, h, id, _imageBuffer);
            klImageOp kliop=new klImageOp();
            kliop.Init("c:\\temp\\out.rts",w,h);
            kliop.OperateTile(tile, "op");
            kliop.OperateTile(tile, "op");

        }
    }
	
}