prepare for multiple apps

2026-04-06 12:23:11 +02:00
parent bd1600e8dc
commit 5afc323f04
904 changed files with 29 additions and 29 deletions
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'dart:ui';
+
+class EquatableImage {
+  Image? _value;
+  final int _imageHash;
+  bool _isDisposed = false;
+
+  EquatableImage(Image value, {required int hash})
+    : _value = value,
+      _imageHash = hash;
+
+  /// The underlying ui.Image. Returns null if disposed.
+  Image? get value => _isDisposed ? null : _value;
+
+  /// Whether this image has been disposed.
+  bool get isDisposed => _isDisposed;
+
+  /// Disposes the underlying ui.Image to free GPU memory.
+  /// This is safe to call multiple times.
+  void dispose() {
+    if (_isDisposed) return;
+    _isDisposed = true;
+    // Delay disposal to allow widgets to finish rendering
+    Future.delayed(const Duration(seconds: 3), () {
+      _value?.dispose();
+      _value = null;
+    });
+  }
+
+  @override
+  int get hashCode => _imageHash.hashCode;
+
+  @override
+  bool operator ==(Object other) {
+    return other is EquatableImage && other._imageHash == _imageHash;
+  }
+}