1:  Response.Clear();

   2:  Response.Expires = 0;

   3:  Response.ContentType = "image/jpeg";

   4:   

   5:  Bitmap canvas = new Bitmap(Server.MapPath("..\\images\\turtle.jpg"));

   6:   

   7:  string mask;

   8:  string backcolor;

   9:  int band = 10;

  10:   

  11:  if (Request.QueryString.Count > 0)

  12:  {

  13:      mask = Request.QueryString["mask"];

  14:      if (!int.TryParse(Request.QueryString["band"], out band))

  15:          band = 10;

  16:      backcolor = Request.QueryString["backcolor"];

  17:  }

  18:  else

  19:  {

  20:      mask = "none";

  21:      backcolor = "Black";

  22:  }

  23:   

  24:   

  25:  Controller pc = new Controller(canvas);

  26:  Bitmap result;

  27:   

  28:  FeatherBuilder fb = new FeatherBuilder(canvas.Width, canvas.Height);

  29:  int width =canvas.Width;

  30:  int height = canvas.Height ;

  31:  fb.BackgroundColor = Color.FromName(backcolor);

  32:   

  33:  // band defines the feather level. 

  34:  fb.Band = band;

  35:   

  36:  // this rectangle defines an area you want to feather the image. It doesn't have to be related to the band value.

  37:  // I just use it in here so I don't need to add one more control to speicify the area. (my laziness)

  38:  Rectangle rect = new Rectangle(band + 20, band + 20, width - (band + 20) * 2, height - (band + 20) * 2);

  39:   

  40:  switch (mask)

  41:  {

  42:      case "Rectangle":

  43:          fb.BuildRectangleMask(rect);

  44:          result = new Bitmap(pc.Feather(fb)); 

  45:          break;

  46:      case "Ellipse":

  47:          fb.BuildEllipseMask(rect);

  48:          result = new Bitmap(pc.Feather(fb)); 

  49:          break;

  50:      case "Polygon":

  51:          int band2 = band * 2;

  52:          // this polygon is a circle, it starts from the top-left point (band2, band2), then go to

  53:          // the top-right point (width-band2, band2), next point will be bottom-right, the last 

  54:          // point is bottom-left. it has 4 points, you can see it is a clockwise circle

  55:          fb.BuildPolygonMask(new Point[]{ new Point(band2, band2), new Point(width-band2, band2), 

  56:              new Point(width-band2, height-band2), new Point(band2, height-band2)});

  57:          result = new Bitmap(pc.Feather(fb)); 

  58:          break;

  59:      default:

  60:          result = new Bitmap(canvas);

  61:          break;

  62:  }

  63:  canvas.Dispose();

  64:  canvas = null;

  65:  pc.Dispose();

  66:  pc = null;

  67:   

  68:  MemoryStream oStream = new MemoryStream();

  69:  result.Save(oStream, ImageFormat.Jpeg);

  70:  Response.BinaryWrite(oStream.ToArray());

  71:   

  72:  result.Dispose();

  73:  result = null;

  74:  Response.End();