將Silverlight中的畫布轉換爲C中的圖像流＃

Question

在Silverlight中，有一個包含線條，矩形，圖像的畫布。 我想從畫布中獲取圖像流。可能嗎？

Answer 1

您可以從https://code.google.com/p/fjcore/獲得開源的FJCore代碼。將FJCore代碼導入您的Silverlight應用程序，然後使用下面的代碼。

 WriteableBitmap wb = new WriteableBitmap(this.canvas1,null); 
     Stream sm = GetBase64Image(wb);  

     public static Stream GetBase64Image(WriteableBitmap bitmap) 
     { 
      int width = bitmap.PixelWidth; 
      int height = bitmap.PixelHeight; 
      int bands = 3; 
      byte[][,] raster = new byte[bands][,]; 

      for (int i = 0; i < bands; i++) 
      { 
       raster[i] = new byte[width, height]; 
      } 

      for (int row = 0; row < height; row++) 
      { 
       for (int column = 0; column < width; column++) 
       { 
        int pixel = bitmap.Pixels[width * row + column]; 
        raster[0][column, row] = (byte)(pixel >> 16); 
        raster[1][column, row] = (byte)(pixel >> 8); 
        raster[2][column, row] = (byte)pixel; 
       } 
      } 

      ColorModel model = new ColorModel { colorspace = ColorSpace.RGB }; 
      FluxJpeg.Core.Image img = new FluxJpeg.Core.Image(model, raster); 
      MemoryStream stream = new MemoryStream(); 
      JpegEncoder encoder = new JpegEncoder(img, 100, stream); 
      encoder.Encode(); 

      return stream; 
     }