public TileRange DownloadTiles(TileRange tiles, ImageryProvider provider)
{
if (provider is ITileGenerator generator)
{
// download tiles
using (TimeSpanBlock timer = new TimeSpanBlock("Tile generation", _logger))
{
// Max download threads defined in provider
var parallelOptions = new ParallelOptions()
{
MaxDegreeOfParallelism = provider.MaxDegreeOfParallelism
};
var range = tiles.TilesInfo.ToList();
_logger?.LogInformation($"Generating {range.Count} tiles with {provider.Name} generator...");
Parallel.ForEach(range, parallelOptions, tile =>
{
var contentbytes = generator.GenerateTile(tile.X, tile.Y, tile.Zoom);
tiles.Add(new MapTile(contentbytes, provider.TileSize, null, tile));
}
);
}
}
else
{
// download tiles
Stopwatch swDownload = Stopwatch.StartNew();
_logger?.LogTrace("Starting images download");
// Max download threads defined in provider
var parallelOptions = new ParallelOptions()
{
MaxDegreeOfParallelism = provider.MaxDegreeOfParallelism
};
var range = tiles.TilesInfo.ToList();
_logger?.LogInformation($"Downloading {range.Count} tiles...");
Parallel.ForEach(range, parallelOptions, tile =>
{
Uri tileUri = BuildUri(provider, tile.X, tile.Y, tile.Zoom);
var contentBytes = cache.GetTile(tileUri, provider, tile);
tiles.Add(new MapTile(contentBytes, provider.TileSize, tileUri, tile));
}
);
swDownload.Stop();
_logger?.LogInformation($"DownloadImages done in : {swDownload.Elapsed:g}");
}
return(tiles);
}
public TileRange DownloadTiles(TileRange tiles, ImageryProvider provider)
{
Stopwatch sw = Stopwatch.StartNew();
int intervalMs = 1000;
if (provider is ITileGenerator generator)
{
// download tiles
using (TimeSpanBlock timer = new TimeSpanBlock("Tile generation", _logger))
{
// Max download threads defined in provider
var parallelOptions = new ParallelOptions()
{
MaxDegreeOfParallelism = provider.MaxDegreeOfParallelism
};
var range = tiles.TilesInfo.ToList();
_logger?.LogInformation($"Generating {range.Count} tiles with {provider.Name} generator...");
Parallel.ForEach(range, parallelOptions, tile =>
{
var contentbytes = generator.GenerateTile(tile.X, tile.Y, tile.Zoom);
tiles.Add(new MapTile(contentbytes, provider.TileSize, null, tile));
}
);
}
}
else
{
// download tiles
Stopwatch swDownload = Stopwatch.StartNew();
_logger?.LogTrace("Starting images download");
// Max download threads defined in provider
var parallelOptions = new ParallelOptions()
{
MaxDegreeOfParallelism = provider.MaxDegreeOfParallelism
};
var range = tiles.TilesInfo.ToList();
int numTilesDownloaded = 0;
_logger?.LogInformation($"Downloading {range.Count} tiles...");
try
{
Parallel.ForEach(range, parallelOptions, (tile, state) =>
{
Uri tileUri = BuildUri(provider, tile.X, tile.Y, tile.Zoom);
var contentBytes = cache.GetTile(tileUri, provider, tile);
tiles.Add(new MapTile(contentBytes, provider.TileSize, tileUri, tile));
Interlocked.Increment(ref numTilesDownloaded);
if (sw.ElapsedMilliseconds > intervalMs)
{
_logger.LogInformation($"{numTilesDownloaded:N0}/{range.Count:N0} tiles downloaded...");
sw.Restart();
}
}
);
}
catch (AggregateException ex)
{
throw ex.GetInnerMostException();
}
catch (Exception)
{
throw;
}
swDownload.Stop();
_logger?.LogInformation($"DownloadImages done in : {swDownload.Elapsed:g}");
}
return(tiles);
}