TASK 51 slice 5: webcam Background section in the Layers properties — Remove/Blur PillToggles (radio-exclusive) + Strength slider; strength changes never blank the webcam (new variant inherits the same-effect frame + bitmap). TASK 51 built (Unit: bg-effects UI)

2026-10-09 10:31:11 -07:00
parent de22983b36
commit 352f117cb2
11 changed files with 169 additions and 49 deletions
@@ -380,14 +380,24 @@ public sealed class CameraManager : IDisposable
        }, DispatcherPriority.Render);
    }

-    // Caller holds _gate.
+    // Caller holds _gate. A new key inherits the last frame + bitmap of a dropped variant with
+    // the SAME effect (a strength change), so neither the stream nor the preview blanks for a
+    // frame while the creator drags the strength slider.
    private static void SyncVariants(CameraSession session, HashSet<WebcamEffectKey> keys)
    {
-        foreach (var stale in session.Effects.Keys.Where(k => !keys.Contains(k)).ToList())
+        var dropped = session.Effects.Where(kv => !keys.Contains(kv.Key)).ToList();
+        foreach (var (stale, _) in dropped)
            session.Effects.Remove(stale);
        foreach (var key in keys)
-            if (!session.Effects.ContainsKey(key))
-                session.Effects[key] = new EffectVariant();
+        {
+            if (session.Effects.ContainsKey(key)) continue;
+            var heir = dropped.FirstOrDefault(kv => kv.Key.Effect == key.Effect).Value;
+            session.Effects[key] = new EffectVariant
+            {
+                LatestFrame = heir?.LatestFrame,
+                PreviewBitmap = heir?.PreviewBitmap,
+            };
+        }
    }

    private void ScheduleEffects(CameraSession session)