public TileRangeCollection GetTileRanges(Bounds bounds, ZoomRange zoomLevel)
{
TileRangeCollection tileRangeCollection = new TileRangeCollection();
for (int i = zoomLevel.MinZoom; i <= zoomLevel.MaxZoom; i++)
{
tileRangeCollection.TileRanges.Add(TileRangeCalculator.GetTiles(bounds, i));
}
return(tileRangeCollection);
}
public new Task Download(TileRangeCollection tileRangeCollection, Action <int, int, int, byte[]> tileReceivedCallback)
{
BlockingCollection <MergedTile> tiles = new BlockingCollection <MergedTile>(100);
Task producerTask = Task.Run(() =>
{
int index = 0;
foreach (TileRange tileRange in tileRangeCollection.TileRanges)
{
foreach (TileIndex tileIndex in tileRange.TileIndexes)
{
tiles.Add(new MergedTile()
{
ZoomLevel = tileRange.ZoomLevel,
TileRow = tileIndex.TileRow,
TileColumn = tileIndex.TileColumn,
Urls = new[]
{
string.Format(TileServerUrls[index % TileServerUrls.Count], tileRange.ZoomLevel + 1,
tileIndex.TileColumn * 2, tileIndex.TileRow * 2),
string.Format(TileServerUrls[index % TileServerUrls.Count], tileRange.ZoomLevel + 1,
(tileIndex.TileColumn * 2) + 1, tileIndex.TileRow * 2),
string.Format(TileServerUrls[index % TileServerUrls.Count], tileRange.ZoomLevel + 1,
tileIndex.TileColumn * 2, (tileIndex.TileRow * 2) + 1),
string.Format(TileServerUrls[index % TileServerUrls.Count], tileRange.ZoomLevel + 1,
(tileIndex.TileColumn * 2) + 1, (tileIndex.TileRow * 2) + 1),
},
});
index++;
}
}
})
.ContinueWith(task => tiles.CompleteAdding());
IList <Task> tasks = new List <Task>();
for (int i = 0; i < 8; i++)
{
Task task = Task.Run(async() =>
{
using (HttpClient httpClient = new HttpClient())
{
foreach (MergedTile tile in tiles.GetConsumingEnumerable())
{
async Task <byte[]> NewFunction(string url, HttpClient httpClient2)
{
using (HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, url))
{
request.Headers.Add("user-agent",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36");
HttpResponseMessage httpResponseMessage = await httpClient2.SendAsync(request);
if (!httpResponseMessage.IsSuccessStatusCode)
{
using (Image <Rgba32> image = new Image <Rgba32>(512, 512))
{
image.Mutate(x => x.BackgroundColor(new Rgba32(253, 253, 253)));
using (MemoryStream memoryStream = new MemoryStream())
{
if (url.EndsWith("png"))
{
image.SaveAsPng(memoryStream);
}
else
{
image.SaveAsJpeg(memoryStream);
}
return(memoryStream.ToArray());
}
}
}
using (Stream contentStream = await httpResponseMessage.Content.ReadAsStreamAsync())
using (MemoryStream memoryStream = new MemoryStream())
{
await contentStream.CopyToAsync(memoryStream);
return(memoryStream.ToArray());
}
}
}
byte[] topLeft = await NewFunction(tile.Urls[0], httpClient);
byte[] topRight = await NewFunction(tile.Urls[1], httpClient);
byte[] bottomLeft = await NewFunction(tile.Urls[2], httpClient);
byte[] bottomRight = await NewFunction(tile.Urls[3], httpClient);
using (Image <Rgba32> image = new Image <Rgba32>(512, 512))
{
image.Mutate(o =>
{
using (Image <Rgba32> topLeftImage = Image.Load(topLeft, new JpegDecoder()))
using (Image <Rgba32> topRightImage = Image.Load(topRight, new JpegDecoder()))
using (Image <Rgba32> bottomLeftImage = Image.Load(bottomLeft, new JpegDecoder()))
using (Image <Rgba32> bottomRightImage = Image.Load(bottomRight, new JpegDecoder()))
{
o.DrawImage(topLeftImage, 1, new SixLabors.Primitives.Point(0, 0));
o.DrawImage(topRightImage, 1, new SixLabors.Primitives.Point(256, 0));
o.DrawImage(bottomLeftImage, 1, new SixLabors.Primitives.Point(0, 256));
o.DrawImage(bottomRightImage, 1, new SixLabors.Primitives.Point(256, 256));
}
});
using (MemoryStream memoryStream = new MemoryStream())
{
image.SaveAsJpeg(memoryStream);
tileReceivedCallback(tile.ZoomLevel, tile.TileRow, tile.TileColumn, memoryStream.ToArray());
}
}
}
}
});
tasks.Add(task);
}
return(Task.WhenAll(tasks));
}
public Task Download(TileRangeCollection tileRangeCollection, Action <int, int, int, byte[]> tileReceivedCallback)
{
BlockingCollection <Tile> tiles = new BlockingCollection <Tile>(100);
Task.Run(() =>
{
int index = 0;
foreach (TileRange tileRange in tileRangeCollection.TileRanges)
{
foreach (TileIndex tileIndex in tileRange.TileIndexes)
{
tiles.Add(new Tile
{
ZoomLevel = tileRange.ZoomLevel,
TileRow = tileIndex.TileRow,
TileColumn = tileIndex.TileColumn,
Url = string.Format(TileServerUrls[index % TileServerUrls.Count], tileRange.ZoomLevel, tileIndex.TileColumn,
tileIndex.TileRow),
});
index++;
}
}
})
.ContinueWith(task => tiles.CompleteAdding());
IList <Task> tasks = new List <Task>();
for (int i = 0; i < 4; i++)
{
Task task = Task.Run(async() =>
{
using (HttpClient client = new HttpClient())
{
foreach (Tile tile in tiles.GetConsumingEnumerable())
{
using (HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, tile.Url))
{
request.Headers.Add("user-agent",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36");
HttpResponseMessage response = await client.SendAsync(request);
if (!response.IsSuccessStatusCode)
{
throw new HttpRequestException(response.ReasonPhrase);
}
using (Stream contentStream = await response.Content.ReadAsStreamAsync())
using (MemoryStream memoryStream = new MemoryStream())
{
// Reduce jpg size
////Image<Rgba32> image = Image.Load(contentStream, new JpegDecoder());
////image.SaveAsJpeg(memoryStream, new JpegEncoder { Quality = 30, Subsample = JpegSubsample.Ratio444 });
await contentStream.CopyToAsync(memoryStream);
tileReceivedCallback(tile.ZoomLevel, tile.TileRow, tile.TileColumn, memoryStream.ToArray());
}
}
}
}
});
tasks.Add(task);
}
return(Task.WhenAll(tasks));
}