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