将IntPtr转换为bitmapimage

本文关键字：bitmapimage 转换 IntPtr | 更新日期: 2023-09-27 18:13:03

我使用twain_32进行扫描，在twainLib.TransferPictures中使用DibToBitmap.FormHDib(hbitmap)从IntPtr获得bitmapsource，但我想要bitmapimage。

我想将IntPtr bitmapsource直接转换为bitmapimage，而不是使其成为bitmapsource然后是bitmapimage

将IntPtr转换为bitmapimage

      [DllImport("Kernel32.dll", CharSet = CharSet.Unicode)]
      private static extern IntPtr GlobalLock(IntPtr hMem);
        [DllImport("GdiPlus.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
        private static extern int GdipCreateBitmapFromGdiDib(IntPtr pBIH, IntPtr pPix, out IntPtr pBitmap);
                public static Bitmap BitmapFromDIB(IntPtr pDIB)
                {
                    IntPtr pPix = (IntPtr)((int)pDIB + 40);
                    IntPtr pBmp = IntPtr.Zero;
                    int status = GdipCreateBitmapFromGdiDib(pDIB, pPix, out pBmp);
                    MethodInfo mi = typeof(Bitmap).GetMethod("FromGDIplus", BindingFlags.Static | BindingFlags.NonPublic);
                    Bitmap bmp = (Bitmap)mi.Invoke(null, new object[] { pBmp });
                    if ((status == 0) && (pBmp != IntPtr.Zero)) return bmp;
                    else return null;
                }
 //   ******
    case TwainCommand.TransferReady:
    {
     ArrayList pics = tw.TransferPictures();
     IntPtr img = (IntPtr)pics[i];
     PicForm newpic = new PicForm();
     var ptrLocked = GlobalLock(img);//lockedptr to image
     newpic.pBox.Image = BitmapFromDIB(ptrLocked); 
     newpic.MdiParent = this;
     int picnum = i + 1;
     newpic.Text = "Picture " + picnumber.ToString();
     newpic.Show();
    }

使用位图构造方法

Bitmap newBitmap = new Bitmap(width, height, Stride, PixelFormat, bitmapSource);

既然你问的是BitmapSource，你的问题被标记为WPF，这里有一个方法来避免使用System.Drawing.Bitmap:

Imaging.CreateBitmapSourceFromHBitmap(imagePointer, IntPtr.Zero, Int32Rect.Empty, 
    BitmapSizeOptions.FromEmptyOptions());

你需要使用System.Windows.Interop。

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