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Fix Wallpaper File Lock #3986

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Merged
merged 9 commits into from
Sep 19, 2025
Merged

Fix Wallpaper File Lock #3986

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80c283a
Improve code quality
Jack251970 Sep 17, 2025
5c16b86
Fix file lock during file stream
Jack251970 Sep 17, 2025
83f02f5
Use log error & Improve returned color
Jack251970 Sep 17, 2025
60ec9b5
Use OnLoaded to ensure the wallpaper file is not locked
Jack251970 Sep 17, 2025
354b04b
Add code comments
Jack251970 Sep 17, 2025
e50a277
Update code comments
Jack251970 Sep 17, 2025
fc2e3fe
Improve ImageLoader performance
Jack251970 Sep 18, 2025
9a597f2
Disable cache feature
Jack251970 Sep 18, 2025
bbc12ec
Revert "Disable cache feature"
Jack251970 Sep 18, 2025
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32 changes: 20 additions & 12 deletions Flow.Launcher/Helper/WallpaperPathRetrieval.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
Expand All @@ -16,7 +17,7 @@ public static class WallpaperPathRetrieval

private const int MaxCacheSize = 3;
private static readonly Dictionary<(string, DateTime), ImageBrush> WallpaperCache = new();
private static readonly object CacheLock = new();
private static readonly Lock CacheLock = new();

public static Brush GetWallpaperBrush()
{
Expand All @@ -31,7 +32,7 @@ public static Brush GetWallpaperBrush()
var wallpaperPath = Win32Helper.GetWallpaperPath();
if (string.IsNullOrEmpty(wallpaperPath) || !File.Exists(wallpaperPath))
{
App.API.LogInfo(ClassName, $"Wallpaper path is invalid: {wallpaperPath}");
App.API.LogError(ClassName, $"Wallpaper path is invalid: {wallpaperPath}");
var wallpaperColor = GetWallpaperColor();
return new SolidColorBrush(wallpaperColor);
}
Expand All @@ -47,17 +48,22 @@ public static Brush GetWallpaperBrush()
return cachedWallpaper;
}
}

using var fileStream = File.OpenRead(wallpaperPath);
var decoder = BitmapDecoder.Create(fileStream, BitmapCreateOptions.DelayCreation, BitmapCacheOption.None);
var frame = decoder.Frames[0];
var originalWidth = frame.PixelWidth;
var originalHeight = frame.PixelHeight;

int originalWidth, originalHeight;
// Use `using ()` instead of `using var` sentence here to ensure the wallpaper file is not locked
using (var fileStream = File.OpenRead(wallpaperPath))
{
var decoder = BitmapDecoder.Create(fileStream, BitmapCreateOptions.DelayCreation, BitmapCacheOption.None);
var frame = decoder.Frames[0];
originalWidth = frame.PixelWidth;
originalHeight = frame.PixelHeight;
}

if (originalWidth == 0 || originalHeight == 0)
{
App.API.LogInfo(ClassName, $"Failed to load bitmap: Width={originalWidth}, Height={originalHeight}");
return new SolidColorBrush(Colors.Transparent);
App.API.LogError(ClassName, $"Failed to load bitmap: Width={originalWidth}, Height={originalHeight}");
var wallpaperColor = GetWallpaperColor();
return new SolidColorBrush(wallpaperColor);
}

// Calculate the scaling factor to fit the image within 800x600 while preserving aspect ratio
Expand All @@ -70,7 +76,9 @@ public static Brush GetWallpaperBrush()
// Set DecodePixelWidth and DecodePixelHeight to resize the image while preserving aspect ratio
var bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.CacheOption = BitmapCacheOption.OnLoad; // Use OnLoaded to ensure the wallpaper file is not locked
bitmap.UriSource = new Uri(wallpaperPath);
bitmap.CreateOptions = BitmapCreateOptions.IgnoreColorProfile;
bitmap.DecodePixelWidth = decodedPixelWidth;
bitmap.DecodePixelHeight = decodedPixelHeight;
bitmap.EndInit();
Expand Down Expand Up @@ -104,13 +112,13 @@ public static Brush GetWallpaperBrush()

private static Color GetWallpaperColor()
{
RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Colors", false);
using var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Colors", false);
var result = key?.GetValue("Background", null);
if (result is string strResult)
{
try
{
var parts = strResult.Trim().Split(new[] { ' ' }, 3).Select(byte.Parse).ToList();
var parts = strResult.Trim().Split([' '], 3).Select(byte.Parse).ToList();
return Color.FromRgb(parts[0], parts[1], parts[2]);
}
catch (Exception ex)
Expand Down
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