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Fix Preview in Welcome Window & Wallpaper Retriever Improvement #3398

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Merged
merged 2 commits into from
Mar 29, 2025
Merged

Fix Preview in Welcome Window & Wallpaper Retriever Improvement #3398

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9ac9ec8
- Fix Preview in WelcomePage
onesounds Mar 29, 2025
c685075
Code quality & Lock & Bitmap memory & Registry access improvement
Jack251970 Mar 29, 2025
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99 changes: 63 additions & 36 deletions Flow.Launcher/Helper/WallpaperPathRetrieval.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,6 @@ namespace Flow.Launcher.Helper;
public static class WallpaperPathRetrieval
{
private static readonly int MAX_CACHE_SIZE = 3;

private static readonly Dictionary<(string, DateTime), ImageBrush> wallpaperCache = new();

public static Brush GetWallpaperBrush()
Expand All @@ -27,46 +26,73 @@ public static Brush GetWallpaperBrush()
try
{
var wallpaperPath = Win32Helper.GetWallpaperPath();
if (wallpaperPath is not null && File.Exists(wallpaperPath))
if (string.IsNullOrEmpty(wallpaperPath) || !File.Exists(wallpaperPath))
{
// Since the wallpaper file name can be the same (TranscodedWallpaper),
// we need to add the last modified date to differentiate them
var dateModified = File.GetLastWriteTime(wallpaperPath);
wallpaperCache.TryGetValue((wallpaperPath, dateModified), out var cachedWallpaper);
if (cachedWallpaper != null)
{
return cachedWallpaper;
}
App.API.LogInfo(nameof(WallpaperPathRetrieval), $"Wallpaper path is invalid: {wallpaperPath}");
var wallpaperColor = GetWallpaperColor();
return new SolidColorBrush(wallpaperColor);
}

// Since the wallpaper file name can be the same (TranscodedWallpaper),
// we need to add the last modified date to differentiate them
var dateModified = File.GetLastWriteTime(wallpaperPath);
wallpaperCache.TryGetValue((wallpaperPath, dateModified), out var cachedWallpaper);
if (cachedWallpaper != null)
{
App.API.LogInfo(nameof(WallpaperPathRetrieval), "Using cached wallpaper");
return cachedWallpaper;
}

// We should not dispose the memory stream since the bitmap is still in use
var memStream = new MemoryStream(File.ReadAllBytes(wallpaperPath));
var bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = memStream;
bitmap.EndInit();

if (bitmap.PixelWidth == 0 || bitmap.PixelHeight == 0)
{
App.API.LogInfo(nameof(WallpaperPathRetrieval), $"Failed to load bitmap: Width={bitmap.PixelWidth}, Height={bitmap.PixelHeight}");
return new SolidColorBrush(Colors.Transparent);
}

var originalWidth = bitmap.PixelWidth;
var originalHeight = bitmap.PixelHeight;

// Calculate the scaling factor to fit the image within 800x600 while preserving aspect ratio
double widthRatio = 800.0 / originalWidth;
double heightRatio = 600.0 / originalHeight;
double scaleFactor = Math.Min(widthRatio, heightRatio);

int decodedPixelWidth = (int)(originalWidth * scaleFactor);
int decodedPixelHeight = (int)(originalHeight * scaleFactor);

// We should not dispose the memory stream since the bitmap is still in use
var memStream = new MemoryStream(File.ReadAllBytes(wallpaperPath));
var bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = memStream;
bitmap.DecodePixelWidth = 800;
bitmap.DecodePixelHeight = 600;
bitmap.EndInit();
bitmap.Freeze(); // Make the bitmap thread-safe
var wallpaperBrush = new ImageBrush(bitmap) { Stretch = Stretch.UniformToFill };
wallpaperBrush.Freeze(); // Make the brush thread-safe

// Manage cache size
if (wallpaperCache.Count >= MAX_CACHE_SIZE)
// Set DecodePixelWidth and DecodePixelHeight to resize the image while preserving aspect ratio
bitmap = new BitmapImage();
bitmap.BeginInit();
memStream.Seek(0, SeekOrigin.Begin); // Reset stream position
bitmap.StreamSource = memStream;
bitmap.DecodePixelWidth = decodedPixelWidth;
bitmap.DecodePixelHeight = decodedPixelHeight;
bitmap.EndInit();
bitmap.Freeze(); // Make the bitmap thread-safe
var wallpaperBrush = new ImageBrush(bitmap) { Stretch = Stretch.UniformToFill };
wallpaperBrush.Freeze(); // Make the brush thread-safe

// Manage cache size
if (wallpaperCache.Count >= MAX_CACHE_SIZE)
{
// Remove the oldest wallpaper from the cache
var oldestCache = wallpaperCache.Keys.OrderBy(k => k.Item2).FirstOrDefault();
if (oldestCache != default)
{
// Remove the oldest wallpaper from the cache
var oldestCache = wallpaperCache.Keys.OrderBy(k => k.Item2).FirstOrDefault();
if (oldestCache != default)
{
wallpaperCache.Remove(oldestCache);
}
wallpaperCache.Remove(oldestCache);
}

wallpaperCache.Add((wallpaperPath, dateModified), wallpaperBrush);
return wallpaperBrush;
}

var wallpaperColor = GetWallpaperColor();
return new SolidColorBrush(wallpaperColor);
wallpaperCache.Add((wallpaperPath, dateModified), wallpaperBrush);
return wallpaperBrush;

}
catch (Exception ex)
{
Expand All @@ -86,8 +112,9 @@ private static Color GetWallpaperColor()
var parts = strResult.Trim().Split(new[] { ' ' }, 3).Select(byte.Parse).ToList();
return Color.FromRgb(parts[0], parts[1], parts[2]);
}
catch
catch (Exception ex)
{
App.API.LogException(nameof(WallpaperPathRetrieval), "Error parsing wallpaper color", ex);
}
}

Expand Down
4 changes: 2 additions & 2 deletions Flow.Launcher/Resources/Pages/WelcomePage1.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -110,8 +110,8 @@
<Border.Background>
<LinearGradientBrush StartPoint="0 0" EndPoint="1 1">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.0" Color="#1494df" />
<GradientStop Offset="1.0" Color="#1073bd" />
<GradientStop Offset="0.0" Color="#2A4D8C" />
<GradientStop Offset="1.0" Color="#1E3160" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Border.Background>
Expand Down
2 changes: 1 addition & 1 deletion Flow.Launcher/Resources/Pages/WelcomePage2.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@
HorizontalAlignment="Center"
VerticalAlignment="Center"
Orientation="Horizontal">
<Border Width="450" Style="{DynamicResource WindowBorderStyle}">
<Border Width="450" Style="{DynamicResource PreviewWindowBorderStyle}">
<Border Style="{DynamicResource WindowRadius}">
<Grid>
<Grid.RowDefinitions>
Expand Down
6 changes: 3 additions & 3 deletions Flow.Launcher/Resources/Pages/WelcomePage5.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -58,10 +58,10 @@

<Border Grid.Row="0" HorizontalAlignment="Stretch">
<Border.Background>
<LinearGradientBrush StartPoint="0 0" EndPoint="1 1">
<LinearGradientBrush StartPoint="0 1" EndPoint="0 0">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.0" Color="#7b83eb" />
<GradientStop Offset="1.0" Color="#555dc0" />
<GradientStop Offset="0.0" Color="#E5F3F7" />
<GradientStop Offset="1.0" Color="#FAFAFD" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Border.Background>
Expand Down
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