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Update TileImageLoader.cs

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ClemensFischer 2025-08-20 22:46:03 +02:00
parent e725be654b
commit 05824e603b
1 changed files with 41 additions and 32 deletions
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73
MapControl/Shared/TileImageLoader.cs
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@ -82,43 +82,52 @@ namespace MapControl
/// </summary> /// </summary>
public async Task LoadTilesAsync(IEnumerable<Tile> tiles, TileSource tileSource, string cacheName, IProgress<double> progress, CancellationToken cancellationToken) public async Task LoadTilesAsync(IEnumerable<Tile> tiles, TileSource tileSource, string cacheName, IProgress<double> progress, CancellationToken cancellationToken)
{ {
using (var semaphore = new SemaphoreSlim(MaxLoadTasks, MaxLoadTasks)) var pendingTiles = tiles.Where(tile => tile.IsPending).ToList();
if (pendingTiles.Count > 0)
{ {
var pendingTiles = tiles.Where(tile => tile.IsPending).ToList(); var progressCount = 0;
var tileCount = 0;
async Task LoadTile(Tile tile) if (Cache == null || tileSource.UriTemplate == null || !tileSource.UriTemplate.StartsWith("http"))
{ {
try cacheName = null; // disable tile image caching
{
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
return;
}
tile.IsPending = false;
progress?.Report((double)++tileCount / pendingTiles.Count);
Logger?.LogTrace("[{thread}] Loading tile image {zoom}/{column}/{row}", Environment.CurrentManagedThreadId, tile.ZoomLevel, tile.Column, tile.Row);
var requestCancellationToken = RequestCancellationEnabled ? cancellationToken : CancellationToken.None;
try
{
await LoadTileImage(tile, tileSource, cacheName, requestCancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
Logger?.LogError(ex, "Failed loading tile image {zoom}/{column}/{row}", tile.ZoomLevel, tile.Column, tile.Row);
}
semaphore.Release();
} }
await Task.WhenAll(pendingTiles.Select(LoadTile)); using (var semaphore = new SemaphoreSlim(MaxLoadTasks, MaxLoadTasks))
{
async Task LoadTile(Tile tile)
{
try
{
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
return;
}
tile.IsPending = false;
progress?.Report((double)++progressCount / pendingTiles.Count);
Logger?.LogTrace("[{thread}] Loading tile image {zoom}/{column}/{row}", Environment.CurrentManagedThreadId, tile.ZoomLevel, tile.Column, tile.Row);
try
{
var requestCancellationToken = RequestCancellationEnabled ? cancellationToken : CancellationToken.None;
await LoadTileImage(tile, tileSource, cacheName, requestCancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
Logger?.LogError(ex, "Failed loading tile image {zoom}/{column}/{row}", tile.ZoomLevel, tile.Column, tile.Row);
}
semaphore.Release();
}
await Task.WhenAll(pendingTiles.Select(tile => Task.Run(async () => await LoadTile(tile))));
}
if (cancellationToken.IsCancellationRequested) if (cancellationToken.IsCancellationRequested)
{ {