MapTile CheckTileInMemory(int m, int n, int level)
{
string key = string.Format(ShortName + "{0:00}{1:0000}{2:0000}", level, m, n);
string path = @"cache\" + Name + @"\" + key + ".jpg";
if (!RamCache.ContainsKey(key)) {
MapTile ct = new MapTile {
Path = path,
Url = GenerateUrl(m, n, level),
LruIndex = 0,
Tile = EmptyTile,
X = m,
Y = n,
Zoom = level
};
RamCache.Add(key, ct);
cacheQueue.Enqueue(ct);
}
if (tileStreamingTask == null) {
tileStreamingTask = new Task(TileStreamingThreadFunc);
tileStreamingTask.Start();
}
RamCache[key].LruIndex = level;
RamCache[key].Time = 0.0f;
return RamCache[key];
}
public bool DownloadTile(MapTile tile)
{
try {
var request = (HttpWebRequest) WebRequest.Create(tile.Url);
request.CachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.CacheIfAvailable);
request.Timeout = TimeoutMs;
request.UserAgent = UserAgent;
request.ReadWriteTimeout = TimeoutMs * 6;
request.Accept = requestAccept;
request.Referer = RefererUrl;
HttpWebResponse response = (HttpWebResponse) request.GetResponse();
if (!Directory.Exists(@"cache\" + Name)) {
Directory.CreateDirectory(@"cache\" + Name);
}
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(response.GetResponseStream());
bitmap.Save(tile.Path, System.Drawing.Imaging.ImageFormat.Jpeg);
return true;
} catch (Exception e) {
#if DEBUG
Log.Warning(e.Message);
#endif
return false;
}
}