Clip an image in a specific shape .NET

Question

I have a page in my MVC4 project where user can add its company logo using the file upload control. These images/logos are then shown on map in mobile application. We need to cr

Answer 1

You can use SetClip function with the Region as parameter:

https://msdn.microsoft.com/en-us/library/x1zb278e(v=vs.110).aspx

So you need to create Graphics object from Bitmap, set clip with the shape of your flag and then draw image on that Graphics object. That's all.

Answer 2

  // Following code derives a cutout bitmap using a
  // scizzor path as a clipping region (like Paint would do)
  // Result bitmap has a minimal suitable size, pixels outside 
  // the clipping path will be white.

  public static Bitmap ApplyScizzors(Bitmap bmpSource, List<PointF> pScizzor)
    {
        GraphicsPath graphicsPath = new GraphicsPath();   // specified Graphicspath          
        graphicsPath.AddPolygon(pScizzor.ToArray());      // add the Polygon
        var rectCutout = graphicsPath.GetBounds();        // find rectangular range           
        Matrix m = new Matrix();
        m.Translate(-rectCutout.Left, -rectCutout.Top);   // translate clip to (0,0)
        graphicsPath.Transform(m);
        Bitmap bmpCutout = new Bitmap((int)(rectCutout.Width), (int)(rectCutout.Height));  // target
        Graphics graphicsCutout = Graphics.FromImage(bmpCutout);
        graphicsCutout.Clip = new Region(graphicsPath);
        graphicsCutout.DrawImage(bmpSource, (int)(-rectCutout.Left), (int)(-rectCutout.Top)); // draw
        graphicsPath.Dispose();
        graphicsCutout.Dispose();
        return bmpCutout;
    }