ClemensFischer/XAML-Map-Control
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ImageLoader implementation

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This commit is contained in:
ClemensFischer 2025-01-02 13:44:46 +01:00
parent 8c18bb3192
commit f029291413
2 changed files with 21 additions and 11 deletions
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2
MapControl/Shared/ImageLoader.cs
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@ -44,7 +44,7 @@ namespace MapControl
{
var response = await GetHttpResponseAsync(uri, progress);
if (response != null && response.Buffer != null)
if (response?.Buffer != null)
{
image = await LoadImageAsync(response.Buffer);
}

30
MapControl/WinUI/ImageLoader.WinUI.cs
View file

@ -70,17 +70,25 @@ namespace MapControl
return image;
}
internal static async Task<WriteableBitmap> LoadWriteableBitmapAsync(Uri uri)
internal static async Task<WriteableBitmap> LoadWriteableBitmapAsync(Uri uri, IProgress<double> progress)
{
WriteableBitmap bitmap = null;
progress.Report(0d);
try
{
using (var stream = await RandomAccessStreamReference.CreateFromUri(uri).OpenReadAsync())
{
var decoder = await BitmapDecoder.CreateAsync(stream);
var response = await GetHttpResponseAsync(uri, progress);
bitmap = await LoadWriteableBitmapAsync(decoder);
if (response?.Buffer != null)
{
using (var memoryStream = new MemoryStream(response.Buffer))
using (var randomAccessStream = memoryStream.AsRandomAccessStream())
{
var decoder = await BitmapDecoder.CreateAsync(randomAccessStream);
bitmap = await LoadWriteableBitmapAsync(decoder);
}
}
}
catch (Exception ex)
@ -88,16 +96,20 @@ namespace MapControl
Debug.WriteLine($"{nameof(ImageLoader)}: {uri}: {ex.Message}");
}
progress.Report(1d);
return bitmap;
}
internal static async Task<ImageSource> LoadMergedImageAsync(Uri uri1, Uri uri2, IProgress<double> progress)
{
WriteableBitmap mergedBitmap = null;
var p1 = 0d;
var p2 = 0d;
progress?.Report(0d);
var bitmaps = await Task.WhenAll(LoadWriteableBitmapAsync(uri1), LoadWriteableBitmapAsync(uri2));
var bitmaps = await Task.WhenAll(
LoadWriteableBitmapAsync(uri1, new Progress<double>(p => { p1 = p; progress.Report((p1 + p2) / 2d); })),
LoadWriteableBitmapAsync(uri2, new Progress<double>(p => { p2 = p; progress.Report((p1 + p2) / 2d); })));
if (bitmaps.Length == 2 &&
bitmaps[0] != null &&
@ -122,8 +134,6 @@ namespace MapControl
}
}
progress?.Report(1d);
return mergedBitmap;
}
}