fix editing tiled images

Azaion.Common/Controls/CanvasEditor.cs

@@ -7,6 +7,7 @@ using System.Windows.Media.Imaging;
 using System.Windows.Shapes;
 using Azaion.Common.Database;
 using Azaion.Common.DTO;
+using Azaion.Common.Extensions;
 using MediatR;
 using Color = System.Windows.Media.Color;
 using Image = System.Windows.Controls.Image;
@@ -473,17 +474,16 @@ public class CanvasEditor : Canvas
 
     public void CreateDetections(Annotation annotation, List<DetectionClass> detectionClasses, Size mediaSize)
     {
-        var splitTile = annotation.SplitTile;
         foreach (var detection in annotation.Detections)
         {
             var detectionClass = DetectionClass.FromYoloId(detection.ClassNumber, detectionClasses);
             CanvasLabel canvasLabel;
-            if (splitTile == null)
+            if (!annotation.IsSplit || mediaSize.FitSizeForAI())
                 canvasLabel = new CanvasLabel(detection, RenderSize, mediaSize, detection.Confidence);    
             else
             {
                 canvasLabel = new CanvasLabel(detection, new Size(Constants.AI_TILE_SIZE, Constants.AI_TILE_SIZE), null, detection.Confidence)
-                    .ReframeFromSmall(splitTile);
+                    .ReframeFromSmall(annotation.SplitTile!);
                 
                 //From CurrentMediaSize to Render Size
                 var yoloLabel = new YoloLabel(canvasLabel, mediaSize);

Azaion.Common/Extensions/BitmapExtensions.cs

@@ -26,4 +26,14 @@ public static class BitmapExtensions
 
     public static Color CreateTransparent(this Color color, byte transparency) =>
         Color.FromArgb(transparency, color.R, color.G, color.B);
+
+    public static async Task SaveImage(this BitmapSource bitmap, string path, CancellationToken ct = default)
+    {
+        await using var stream = new FileStream(path, FileMode.Create);
+        var encoder = new JpegBitmapEncoder();
+
+        encoder.Frames.Add(BitmapFrame.Create(bitmap));
+        encoder.Save(stream);
+        await stream.FlushAsync(ct);
+    }
 }

Azaion.Common/Extensions/SizeExtensions.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+namespace Azaion.Common.Extensions;
+
+public static class SizeExtensions
+{
+    public static bool FitSizeForAI(this Size size) =>
+        // Allow to be up to FullHD to save as 1280*1280
+        size.Width <= Constants.AI_TILE_SIZE * 1.5 && size.Height <= Constants.AI_TILE_SIZE * 1.5;
+}