PdfSharp.Drawing.XGraphics.IntersectClip C# (CSharp) Method

    public void IntersectClip(XGraphicsPath path)
    {
      if (path == null)
        throw new ArgumentNullException("path");

      if (this.drawGraphics)
      {
#if GDI && WPF
        if (this.targetContext == XGraphicTargetContext.GDI)
        {
          //this.gfx.SetClip(path.gdipPath, CombineMode.Intersect);
          this.gfx.SetClip(path.gdipPath, CombineMode.Intersect);
        }
        else
        {
          //this.dc.p.renderer.SetClip(path, XCombineMode.Intersect);
          this.gsStack.Current.SetClip(path.pathGeometry);
        }
#endif
#if GDI && !WPF
        if (this.targetContext == XGraphicTargetContext.GDI)
          this.gfx.SetClip(path.gdipPath, CombineMode.Intersect);
#endif
#if WPF && !GDI
        if (this.targetContext == XGraphicTargetContext.WPF)
          this.gsStack.Current.SetClip(path.pathGeometry);
#endif
      }
      if (this.renderer != null)
        this.renderer.SetClip(path, XCombineMode.Intersect);
    }

    /// <summary>
    /// Demonstrates the use of XGraphics.Transform.
    /// </summary>
    public override void RenderPage(XGraphics gfx)
    {
      base.RenderPage(gfx);

      //XGraphicsState state = gfx.Save();

      gfx.Save();
      gfx.IntersectClip(new XRect(20, 20, 300, 500));
      gfx.DrawRectangle(XBrushes.Yellow, 0, 0, gfx.PageSize.Width, gfx.PageSize.Height);
      gfx.Restore();

      gfx.Save();
      gfx.IntersectClip(new XRect(100, 200, 300, 500));
      gfx.DrawRectangle(XBrushes.LightBlue, 0, 0, gfx.PageSize.Width, gfx.PageSize.Height);

      gfx.DrawLine(XPens.MediumSlateBlue, 0, 0, 150, 200);
      gfx.DrawPolygon(properties.Pen1.Pen, GetPentagram(75, new PointF(150, 200)));


      Matrix matrix = new Matrix();
      //matrix.Scale(2f, 1.5f);
      //matrix.Translate(-200, -400);
      //matrix.Rotate(45);
      //matrix.Translate(200, 400);
      //gfx.Transform = matrix;
      //gfx.TranslateTransform(50, 30);

#if true
      gfx.TranslateTransform(30, 40, XMatrixOrder.Prepend);
      gfx.ScaleTransform(2.0f, 2.0f, XMatrixOrder.Prepend);
      gfx.RotateTransform(15, XMatrixOrder.Prepend);
#else
      gfx.TranslateTransform(30, 40, XMatrixOrder.Append);
      gfx.ScaleTransform(2.0f, 2.0f, XMatrixOrder.Append);
      gfx.RotateTransform(15, XMatrixOrder.Append);
#endif
      bool id = matrix.IsIdentity;
      matrix.Scale(2.0f, 2.0f, MatrixOrder.Prepend);
      //matrix.Translate(30, -50);
      matrix.Rotate(15, MatrixOrder.Prepend);
      //Matrix mtx = gfx.Transform.ToGdiMatrix();
      //gfx.Transform = matrix;

      gfx.DrawLine(XPens.MediumSlateBlue, 0, 0, 150, 200);
      gfx.DrawPolygon(properties.Pen2.Pen, GetPentagram(75, new PointF(150, 200)));

      gfx.Restore();

      gfx.DrawLine(XPens.Red, 0, 0, 1000, 1000);

      gfx.DrawPolygon(XPens.SandyBrown, GetPentagram(75, new PointF(150, 200)));

    }