From a1f513852ed0fc083b8a8b7546c8129298d098e4 Mon Sep 17 00:00:00 2001
From: Scighost <scighost@outlook.com>
Date: Wed, 17 Jan 2024 10:04:34 +0800
Subject: [PATCH] use image thumbnail to limit memory increase

---
 src/Starward/Controls/CachedImage.cs   | 33 +++++++++++++++++++++++++-
 src/Starward/Pages/ImageViewPage.xaml  |  2 ++
 src/Starward/Pages/ScreenshotPage.xaml |  2 ++
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/src/Starward/Controls/CachedImage.cs b/src/Starward/Controls/CachedImage.cs
index 7a0eb62e7..f3f21296f 100644
--- a/src/Starward/Controls/CachedImage.cs
+++ b/src/Starward/Controls/CachedImage.cs
@@ -1,4 +1,5 @@
 using CommunityToolkit.WinUI.UI.Controls;
+using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Media;
 using Microsoft.UI.Xaml.Media.Imaging;
 using Starward.Services.Cache;
@@ -7,6 +8,8 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
+using Windows.Storage;
+using Windows.Storage.FileProperties;
 
 namespace Starward.Controls;
 
@@ -23,14 +26,42 @@ public static void ClearCache()
     }
 
 
+
+    public bool IsThumbnail
+    {
+        get { return (bool)GetValue(IsThumbnailProperty); }
+        set { SetValue(IsThumbnailProperty, value); }
+    }
+
+    public static readonly DependencyProperty IsThumbnailProperty =
+        DependencyProperty.Register("IsThumbnail", typeof(bool), typeof(CachedImage), new PropertyMetadata(false));
+
+
+
+
     protected override async Task<ImageSource> ProvideCachedResourceAsync(Uri imageUri, CancellationToken token)
     {
         try
         {
-            if (imageUri.Scheme is "ms-appx" or "file")
+            if (imageUri.Scheme is "ms-appx")
             {
                 return new BitmapImage(imageUri);
             }
+            else if (imageUri.Scheme is "file")
+            {
+                if (IsThumbnail)
+                {
+                    StorageFile file = await StorageFile.GetFileFromPathAsync(imageUri.LocalPath);
+                    StorageItemThumbnail thumbnail = await file.GetThumbnailAsync(ThumbnailMode.SingleItem, 240, ThumbnailOptions.UseCurrentScale);
+                    BitmapImage image = new BitmapImage();
+                    await image.SetSourceAsync(thumbnail);
+                    return image;
+                }
+                else
+                {
+                    return new BitmapImage(imageUri);
+                }
+            }
             else
             {
                 if (fileCache.TryGetValue(imageUri, out var uri))
diff --git a/src/Starward/Pages/ImageViewPage.xaml b/src/Starward/Pages/ImageViewPage.xaml
index 6d57b2f54..f65dad142 100644
--- a/src/Starward/Pages/ImageViewPage.xaml
+++ b/src/Starward/Pages/ImageViewPage.xaml
@@ -83,6 +83,8 @@
                 <DataTemplate x:DataType="sm:ScreenshotItem">
                     <sc:CachedImage Height="80"
                                     EnableLazyLoading="True"
+                                    IsCacheEnabled="True"
+                                    IsThumbnail="True"
                                     Source="{x:Bind FullName}" />
                 </DataTemplate>
             </GridView.ItemTemplate>
diff --git a/src/Starward/Pages/ScreenshotPage.xaml b/src/Starward/Pages/ScreenshotPage.xaml
index a659a155c..0a354192f 100644
--- a/src/Starward/Pages/ScreenshotPage.xaml
+++ b/src/Starward/Pages/ScreenshotPage.xaml
@@ -147,6 +147,8 @@
                                                 ui:VisualExtensions.NormalizedCenterPoint="0.5"
                                                 Background="{ThemeResource ControlAltFillColorTertiaryBrush}"
                                                 EnableLazyLoading="True"
+                                                IsCacheEnabled="True"
+                                                IsThumbnail="True"
                                                 Source="{x:Bind FullName}"
                                                 Stretch="UniformToFill">
                                     <animations:Explicit.Animations>