namespace ExampleCodeSnippets
{
 [NUnit.Framework.TestFixture]
 public class PolygonSymbolizerTest
 {
 private class ModifiedBasicPolygonSymbolizer : SharpMap.Rendering.Symbolizer.BasicPolygonSymbolizer
 {
 private System.Drawing.Point _oldRenderOrigin;

 public override void Begin(System.Drawing.Graphics g, SharpMap.MapViewport map, int aproximateNumberOfGeometries)
 {
 base.Begin(g, map, aproximateNumberOfGeometries);
 _oldRenderOrigin = g.RenderingOrigin;
 }
 protected override void OnRenderInternal(SharpMap.MapViewport map, GeoAPI.Geometries.IPolygon polygon, System.Drawing.Graphics g)
 {
 var pt = polygon.Centroid;
 g.RenderingOrigin = 
 System.Drawing.Point.Truncate(map.WorldToImage(pt.Coordinate));
 base.OnRenderInternal(map, polygon, g);
 }
 public override void End(System.Drawing.Graphics g, SharpMap.MapViewport map)
 {
 g.RenderingOrigin = _oldRenderOrigin;
 }

 }

 [NUnit.Framework.OneTimeSetUp]
 public void OneTimeSetUp()
 { }

 [NUnit.Framework.Test]
 public void TestPlainPolygonSymbolizer()
 {
 var provider = new SharpMap.Data.Providers.ShapeFile(
 "..\\..\\..\\WinFormSamples\\GeoData\\World\\countries.shp", true);
 var l = new SharpMap.Layers.Symbolizer.PolygonalVectorLayer("Countries", provider);
 l.Symbolizer = new ModifiedBasicPolygonSymbolizer
 {
 Fill = new System.Drawing.Drawing2D.HatchBrush(
 System.Drawing.Drawing2D.HatchStyle.WideDownwardDiagonal, 
 System.Drawing.Color.Red /*,
 System.Drawing.Color.LightPink*/),
 UseClipping = false,
 //Outline = System.Drawing.Pens.AliceBlue
 };

 var m = new SharpMap.Map(new System.Drawing.Size(1440, 1080)) { BackColor = System.Drawing.Color.Cornsilk };
 m.Layers.Add(l);

 m.ZoomToExtents();

 var sw = new System.Diagnostics.Stopwatch();
 var img = m.GetMap();
 
 sw.Start();
 img = m.GetMap();
 img.Save("PolygonSymbolizer-1.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
 sw.Stop();
 System.Console.WriteLine(string.Format("Rendering new method:{0}ms", sw.ElapsedMilliseconds));

 l.Symbolizer = new SharpMap.Rendering.Symbolizer.BasicPolygonSymbolizer()
 {
 Fill = new System.Drawing.Drawing2D.HatchBrush(
 System.Drawing.Drawing2D.HatchStyle.WideDownwardDiagonal,
 System.Drawing.Color.Red/*,
 System.Drawing.Color.LightPink*/),
 UseClipping = false,
 //Outline = System.Drawing.Pens.AliceBlue
 };

 sw.Reset(); sw.Start();
 img = m.GetMap();
 img.Save("PolygonSymbolizer-2.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
 sw.Stop();
 System.Console.WriteLine(string.Format("Rendering new method:{0}ms", sw.ElapsedMilliseconds));
 
 }
 }

}