Silverlight 引路蜂二维图形库示例:显示位图

类Graphics2D同样提供了绘制位图的方法，drawImage(). 下面的例子显示卫星地图。卫星地图有卫星照片和道路名称组合而成，所选的原始图像，可以参见

http://www.mapdigit.com/guidebeemap/maptile.php?type=MICROSOFTSATELLITE&x=7&y=4&z=14    maptile_7_4.jpg
http://www.mapdigit.com/guidebeemap/maptile.php?type=MICROSOFTSATELLITE&x=6&y=4&z=14  maptile_6_4.jpg
http://www.mapdigit.com/guidebeemap/maptile.php?type=GOOGLEHYBRID&x=7&y=4&z=14  maptile_7_4.png
http://www.mapdigit.com/guidebeemap/maptile.php?type=GOOGLEHYBRID&x=6&y=4&z=14  maptile_6_4.png

private void DrawMap()
{
 BitmapImage img = new BitmapImage();
 img.CreateOptions = BitmapCreateOptions.None;
 string path = "/SilverlightGraphics2DDemo;component/map/maptile_6_4.jpg";
 Stream s = Application.GetResourceStream(new Uri(path, UriKind.Relative)).Stream;
 img.SetSource(s);
 WriteableBitmap writeableBitmap = new WriteableBitmap(img);
 graphics2D.Clear(Color.White);
 graphics2D.DrawImage(writeableBitmap.Pixels, 256, 256, 0, 0);
 
 path = "/SilverlightGraphics2DDemo;component/map/maptile_7_4.jpg";
 s = Application.GetResourceStream(new Uri(path, UriKind.Relative)).Stream;
 img.SetSource(s);
 writeableBitmap = new WriteableBitmap(img);
 graphics2D.DrawImage(writeableBitmap.Pixels, 256, 256,256,0);
 
 path = "/SilverlightGraphics2DDemo;component/map/maptile_6_4.png";
 s = Application.GetResourceStream(new Uri(path, UriKind.Relative)).Stream;
 img.SetSource(s);
 writeableBitmap = new WriteableBitmap(img);
 graphics2D.DrawImage(writeableBitmap.Pixels, 256, 256, 0, 0);
 
 path = "/SilverlightGraphics2DDemo;component/map/maptile_7_4.png";
 s = Application.GetResourceStream(new Uri(path, UriKind.Relative)).Stream;
 img.SetSource(s);
 writeableBitmap = new WriteableBitmap(img);
 graphics2D.DrawImage(writeableBitmap.Pixels, 256, 256, 256, 0);
}