// <summary>
#region ILayer Members
/// <summary>
/// Renders the layer
/// </summary>
/// <param name="g">Graphics object reference</param>
/// <param name="map">Map which is rendered</param>
public override void Render(Graphics g, Map map)
{
Bitmap bitmap = null;
try
{
foreach (string key in _TileSetsActive)
{
TileSet tileSet = _TileSets[key];
tileSet.Verify();
List <Envelope> tileExtents = TileExtents.GetTileExtents(tileSet, map.Envelope, map.PixelSize);
if (logger.IsDebugEnabled)
{
logger.DebugFormat("TileCount: {0}", tileExtents.Count);
}
//TODO: Retrieve several tiles at the same time asynchronously to improve performance. PDD.
foreach (Envelope tileExtent in tileExtents)
{
if (bitmap != null)
{
bitmap.Dispose();
}
if ((tileSet.TileCache != null) && (tileSet.TileCache.ContainsTile(tileExtent)))
{
bitmap = tileSet.TileCache.GetTile(tileExtent);
}
else
{
bitmap = WmsGetMap(tileExtent, tileSet);
if ((tileSet.TileCache != null) && (bitmap != null))
{
tileSet.TileCache.AddTile(tileExtent, bitmap);
}
}
if (bitmap != null)
{
PointF destMin = Transform.WorldtoMap(tileExtent.Min(), map);
PointF destMax = Transform.WorldtoMap(tileExtent.Max(), map);
double minX = (int)Math.Round(destMin.X);
double minY = (int)Math.Round(destMax.Y);
double maxX = (int)Math.Round(destMax.X);
double maxY = (int)Math.Round(destMin.Y);
g.DrawImage(bitmap,
new Rectangle((int)minX, (int)minY, (int)(maxX - minX), (int)(maxY - minY)),
0, 0, tileSet.Width, tileSet.Height,
GraphicsUnit.Pixel, _ImageAttributes);
}
}
}
}
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
}
// <summary>
/// Renders the layer
/// </summary>
/// <param name="g">Graphics object reference</param>
/// <param name="map">Map which is rendered</param>
public override void Render(System.Drawing.Graphics g, Map map)
{
System.Drawing.Bitmap bitmap = null;
try
{
foreach (string key in _TileSetsActive)
{
TileSet tileSet = _TileSets[key];
tileSet.Verify();
List <BoundingBox> tileExtents = TileExtents.GetTileExtents(tileSet, map.Envelope, map.PixelSize);
//TODO: Retrieve several tiles at the same time asynchronously to improve performance. PDD.
foreach (BoundingBox tileExtent in tileExtents)
{
if (bitmap != null)
{
bitmap.Dispose();
}
if ((tileSet.TileCache != null) && (tileSet.TileCache.ContainsTile(tileExtent)))
{
bitmap = tileSet.TileCache.GetTile(tileExtent);
}
else
{
bitmap = WmsGetMap(tileExtent, tileSet);
if ((tileSet.TileCache != null) && (bitmap != null))
{
tileSet.TileCache.AddTile(tileExtent, bitmap);
}
}
if (bitmap != null)
{
PointF destMin = SharpMap.Utilities.Transform.WorldtoMap(tileExtent.Min, map);
PointF destMax = SharpMap.Utilities.Transform.WorldtoMap(tileExtent.Max, map);
#region Comment on BorderBug correction
// Even when tiles border to one another without any space between them there are
// seams visible between the tiles in the map image.
// This problem could be resolved with the solution suggested here:
// http://www.codeproject.com/csharp/BorderBug.asp
// The suggested correction value of 0.5f still results in seams in some cases, not so with 0.4999f.
// Also it was necessary to apply Math.Round and Math.Ceiling on the destination rectangle.
// PDD.
#endregion
float correction = 0.4999f;
RectangleF srcRect = new RectangleF(0 - correction, 0 - correction, tileSet.Width, tileSet.Height);
InterpolationMode tempInterpolationMode = g.InterpolationMode;
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
//TODO: Allow custom image attributes for each TileSet.
int x = (int)Math.Round(destMin.X);
int y = (int)Math.Round(destMax.Y);
int width = (int)Math.Round(destMax.X - x);
int height = (int)Math.Round(destMin.Y - y);
g.DrawImage(bitmap, new Rectangle(x, y, width, height),
srcRect.Left, srcRect.Top, srcRect.Width, srcRect.Height,
GraphicsUnit.Pixel, _ImageAttributes);
g.InterpolationMode = tempInterpolationMode; //Put InterpolationMode back so drawing of other layers is not affected.
}
}
}
}
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
}
