feat: capture fresh image (#10460)

* feat: 使用 AsstAsyncScreencap 的实时截图

---------

Co-authored-by: uye <99072975+ABA2396@users.noreply.github.com>

* feat: 增加空阻塞任务以便调试

* chore: 增加帧率显示

---------

Co-authored-by: zzyyyl <aysyxx53@hotmail.com>

resource/tasks.json

@@ -1,4 +1,9 @@
 {
+    "Block": {
+        "algorithm": "JustReturn",
+        "postDelay": 1000,
+        "next": ["#self"]
+    },
     "SlowlySwipeToTheLeft": {
         "algorithm": "JustReturn",
         "action": "Swipe",

src/MaaCore/Assistant.h

@@ -99,7 +99,7 @@ namespace asst
     public:
         std::shared_ptr<Controller> ctrler() const { return m_ctrler; }
         std::shared_ptr<Status> status() const { return m_status; }
-        bool need_exit() const { return m_thread_idle; }
+        bool need_exit() const { return m_thread_idle && m_running; }
 
     private:
         void append_callback(AsstMsg msg, const json::value& detail);

src/MaaWpfGui/Main/AsstProxy.cs

@@ -194,6 +194,12 @@ namespace MaaWpfGui.Main
             return AsstGetImage(_handle);
         }
 
+        public BitmapImage? AsstGetFreshImage()
+        {
+            MaaService.AsstAsyncScreencap(_handle, true);
+            return AsstGetImage(_handle);
+        }
+
         private readonly MaaService.CallbackDelegate _callback;
 
         /// <summary>
@@ -2599,6 +2605,9 @@ namespace MaaWpfGui.Main
                 ["task_names"] = new JArray
                 {
                     once ? "GachaOnce" : "GachaTenTimes",
+
+                    // TEST
+                    // "Block",
                 },
             };
             AsstTaskId id = AsstAppendTaskWithEncoding("Custom", taskParams);

src/MaaWpfGui/Services/MaaService.cs

@@ -60,6 +60,9 @@ namespace MaaWpfGui.Services
         [DllImport("MaaCore.dll")]
         public static extern bool AsstStop(AsstHandle handle);
 
+        [DllImport("MaaCore.dll")]
+        public static extern unsafe Int32 AsstAsyncScreencap(AsstHandle handle, bool block);
+
         [DllImport("MaaCore.dll")]
         public static extern unsafe ulong AsstGetImage(AsstHandle handle, byte* buff, ulong buffSize);
 

src/MaaWpfGui/ViewModels/UI/RecognizerViewModel.cs

@@ -747,6 +747,14 @@ namespace MaaWpfGui.ViewModels.UI
             set => SetAndNotify(ref _gachaInfo, value);
         }
 
+        private double _gachaScreenFpf;
+
+        public double GachaScreenFpf
+        {
+            get => _gachaScreenFpf;
+            set => SetAndNotify(ref _gachaScreenFpf, value);
+        }
+
         // xaml 中用到了
         // ReSharper disable once UnusedMember.Global
         public void GachaOnce()
@@ -782,15 +790,13 @@ namespace MaaWpfGui.ViewModels.UI
                 return;
             }
 
-            _gachaImageTimer.Interval = TimeSpan.FromMilliseconds(500);
+            _gachaImageTimer.Interval = TimeSpan.FromMilliseconds(10);
             _gachaImageTimer.Tick += RefreshGachaImage;
             _gachaImageTimer.Start();
         }
 
         private readonly DispatcherTimer _gachaImageTimer = new();
 
-        private static readonly object _lock = new();
-
         private BitmapImage? _gachaImage;
 
         public BitmapImage? GachaImage
@@ -799,21 +805,31 @@ namespace MaaWpfGui.ViewModels.UI
             set => SetAndNotify(ref _gachaImage, value);
         }
 
+        private DateTime _lastTipUpdateTime = DateTime.MinValue;
+        private DateTime _lastFpsUpdateTime = DateTime.MinValue;
+        private int _frameCount;
+
         private void RefreshGachaImage(object? sender, EventArgs? e)
         {
-            lock (_lock)
+            GachaImage = Instances.AsstProxy.AsstGetFreshImage();
+
+            var now = DateTime.Now;
+            _frameCount++;
+            if ((now - _lastFpsUpdateTime).TotalSeconds >= 1)
             {
-                var image = Instances.AsstProxy.AsstGetImage();
-                if (GachaImage.IsEqual(image))
-                {
-                    return;
-                }
-
-                GachaImage = image;
-
-                var rd = new Random();
-                GachaInfo = LocalizationHelper.GetString("GachaTip" + rd.Next(1, 18).ToString());
+                GachaScreenFpf = _frameCount / (now - _lastFpsUpdateTime).TotalSeconds;
+                _frameCount = 0;
+                _lastFpsUpdateTime = now;
             }
+
+            if ((now - _lastTipUpdateTime).TotalSeconds < 5)
+            {
+                return;
+            }
+
+            var rd = new Random();
+            GachaInfo = LocalizationHelper.GetString("GachaTip" + rd.Next(1, 18));
+            _lastTipUpdateTime = now;
         }
 
         // DO NOT CHANGE

src/MaaWpfGui/Views/UI/RecognizerView.xaml

@@ -358,12 +358,28 @@
                     Text="{Binding GachaInfo}"
                     TextWrapping="Wrap"
                     Visibility="{c:Binding !GachaShowDisclaimer}" />
-                <Image
+                <Grid
                     Grid.Row="1"
-                    Margin="10"
                     HorizontalAlignment="Center"
                     VerticalAlignment="Center"
-                    Source="{Binding GachaImage}" />
+                    Visibility="{c:Binding !GachaShowDisclaimer}">
+                    <Image
+                        Margin="10"
+                        HorizontalAlignment="Center"
+                        VerticalAlignment="Center"
+                        Source="{Binding GachaImage}" />
+                    <Canvas>
+                        <controls:TextBlock
+                            Canvas.Left="10"
+                            Canvas.Top="10"
+                            HorizontalAlignment="Left"
+                            VerticalAlignment="Top"
+                            FontWeight="Bold"
+                            Foreground="Aquamarine"
+                            Text="{Binding GachaScreenFpf, StringFormat={}{0:F2}}"
+                            Visibility="{c:Binding 'GachaImage != null'}" />
+                    </Canvas>
+                </Grid>
                 <StackPanel
                     Grid.Row="1"
                     HorizontalAlignment="Center"