Wpf Image 展示方式 图片处理 显示

Wpf Image 展示方式 图片处理 显示

1、创建Bitmap

   public Bitmap CreateBitmap(int width,int height,int step,IntPtr pdata)
   {
       return new Bitmap(
           width,
           height,
           step,
           System.Drawing.Imaging.PixelFormat.Format8bppIndexed,
           pdata);
   }

2、Bitmap转BitmapSource显示

   public void ShowImg(System.Drawing.Bitmap bitmap)
   {
       IntPtr hBitmap = bitmap.GetHbitmap();
       Img = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
   }

3、Bitmap转BitmapImage显示

   public void ShowImgEx(System.Drawing.Bitmap bitmap)
   {
       MemoryStream ms = new MemoryStream();
       bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
       byte[] bytes = ms.GetBuffer();  //byte[]   bytes=   ms.ToArray(); 这两句都可以
       ms.Close();
       BitmapImage image = new BitmapImage();
       image.BeginInit();
       image.StreamSource = new MemoryStream(bytes);
       image.EndInit();
       Img = image; 
       bitmap.Save("111.bmp",ImageFormat.Bmp);
   }

4、WriteableBitmap 显示

   public void ShowImgEx2(int width, int height, IntPtr pdata)
   {
       var (pixel, palette) = GetPixelFormat(1);
       int bufferLen = width * height;
       BitmapSource? bitmapSource = 
           WriteableBitmap.Create(width, height
           , 96, 96, pixel, palette, pdata, bufferLen, width);
       Img = bitmapSource;
   }