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Image loading with cancellation

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ClemensFischer 2025-08-19 23:20:11 +02:00
parent 81eabef257
commit 69bba213f0
13 changed files with 103 additions and 88 deletions
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10
MapControl/Avalonia/ImageLoader.Avalonia.cs
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@ -4,6 +4,7 @@ using Avalonia.Media.Imaging;
using Avalonia.Platform;
using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MapControl
@ -38,17 +39,18 @@ namespace MapControl
}
}
internal static async Task<IImage> LoadMergedImageAsync(Uri uri1, Uri uri2, IProgress<double> progress)
internal static async Task<IImage> LoadMergedImageAsync(Uri uri1, Uri uri2, IProgress<double> progress, CancellationToken cancellationToken)
{
WriteableBitmap mergedBitmap = null;
var p1 = 0d;
var p2 = 0d;
var images = await Task.WhenAll(
LoadImageAsync(uri1, new Progress<double>(p => { p1 = p; progress.Report((p1 + p2) / 2d); })),
LoadImageAsync(uri2, new Progress<double>(p => { p2 = p; progress.Report((p1 + p2) / 2d); })));
LoadImageAsync(uri1, new Progress<double>(p => { p1 = p; progress.Report((p1 + p2) / 2d); }), cancellationToken),
LoadImageAsync(uri2, new Progress<double>(p => { p2 = p; progress.Report((p1 + p2) / 2d); }), cancellationToken));
if (images.Length == 2 &&
if (!cancellationToken.IsCancellationRequested &&
images.Length == 2 &&
images[0] is Bitmap bitmap1 &&
images[1] is Bitmap bitmap2 &&
bitmap1.PixelSize.Height == bitmap2.PixelSize.Height &&