| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QQUICKPIXMAPCACHE_H |
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| 5 | #define QQUICKPIXMAPCACHE_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QtCore/qmutex.h> |
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| 19 | #include <QtCore/qurl.h> |
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| 20 | #include <QtQuick/qquickimageprovider.h> |
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| 21 | #include <private/qquickpixmap_p.h> |
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| 22 | |
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| 23 | QT_BEGIN_NAMESPACE |
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| 24 | |
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| 25 | class QQuickPixmapData; |
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| 26 | |
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| 27 | /*! \internal |
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| 28 | A composite key to identify a QQuickPixmapData instance in a QHash. |
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| 29 | */ |
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| 30 | struct Q_AUTOTEST_EXPORT QQuickPixmapKey |
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| 31 | { |
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| 32 | const QUrl *url; |
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| 33 | const QRect *region; |
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| 34 | const QSize *size; |
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| 35 | int frame; |
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| 36 | QQuickImageProviderOptions options; |
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| 37 | }; |
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| 38 | |
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| 39 | /*! \internal |
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| 40 | A singleton managing the storage and garbage collection of QQuickPixmapData |
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| 41 | instances. It's exported only for the sake of autotests, and should not be |
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| 42 | manipulated outside qquickpixmap.cpp and qquickpixmapcache.cpp. |
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| 43 | */ |
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| 44 | class Q_AUTOTEST_EXPORT QQuickPixmapCache : public QObject |
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| 45 | { |
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| 46 | Q_OBJECT |
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| 47 | |
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| 48 | public: |
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| 49 | static QQuickPixmapCache *instance(); |
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| 50 | ~QQuickPixmapCache() override; |
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| 51 | |
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| 52 | void unreferencePixmap(QQuickPixmapData *); |
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| 53 | void referencePixmap(QQuickPixmapData *); |
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| 54 | |
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| 55 | void purgeCache(); |
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| 56 | |
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| 57 | protected: |
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| 58 | void timerEvent(QTimerEvent *) override; |
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| 59 | |
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| 60 | private: |
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| 61 | QQuickPixmapCache() = default; |
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| 62 | Q_DISABLE_COPY(QQuickPixmapCache) |
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| 63 | |
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| 64 | void shrinkCache(int remove); |
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| 65 | int destroyCache(); |
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| 66 | qsizetype referencedCost() const; |
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| 67 | |
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| 68 | private: |
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| 69 | QHash<QQuickPixmapKey, QQuickPixmapData *> m_cache; |
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| 70 | mutable QMutex m_cacheMutex; // avoid simultaneous iteration and modification |
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| 71 | |
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| 72 | QQuickPixmapData *m_unreferencedPixmaps = nullptr; |
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| 73 | QQuickPixmapData *m_lastUnreferencedPixmap = nullptr; |
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| 74 | |
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| 75 | int m_unreferencedCost = 0; |
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| 76 | int m_timerId = -1; |
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| 77 | bool m_destroying = false; |
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| 78 | |
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| 79 | friend class QQuickPixmap; |
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| 80 | friend class QQuickPixmapData; |
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| 81 | friend class tst_qquickpixmapcache; |
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| 82 | friend class tst_qquicktext; |
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| 83 | friend class tst_qquicktextedit; |
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| 84 | }; |
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| 85 | |
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| 86 | QT_END_NAMESPACE |
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| 87 | |
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| 88 | #endif // QQUICKPIXMAPCACHE_H |
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| 89 | |
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