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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQUICKPIXMAPCACHE_H
#define QQUICKPIXMAPCACHE_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qmutex.h>
#include <QtCore/qurl.h>
#include <QtQuick/qquickimageprovider.h>
#include <private/qquickpixmap_p.h>
QT_BEGIN_NAMESPACE
class QQuickPixmapData;
/*! \internal
A composite key to identify a QQuickPixmapData instance in a QHash.
*/
struct Q_AUTOTEST_EXPORT QQuickPixmapKey
{
const QUrl *url;
const QRect *region;
const QSize *size;
int frame;
QQuickImageProviderOptions options;
};
/*! \internal
A singleton managing the storage and garbage collection of QQuickPixmapData
instances. It's exported only for the sake of autotests, and should not be
manipulated outside qquickpixmap.cpp and qquickpixmapcache.cpp.
*/
class Q_AUTOTEST_EXPORT QQuickPixmapCache : public QObject
{
Q_OBJECT
public:
static QQuickPixmapCache *instance();
~QQuickPixmapCache() override;
void unreferencePixmap(QQuickPixmapData *);
void referencePixmap(QQuickPixmapData *);
void purgeCache();
protected:
void timerEvent(QTimerEvent *) override;
private:
QQuickPixmapCache() = default;
Q_DISABLE_COPY(QQuickPixmapCache)
void shrinkCache(int remove);
int destroyCache();
qsizetype referencedCost() const;
private:
QHash<QQuickPixmapKey, QQuickPixmapData *> m_cache;
mutable QMutex m_cacheMutex; // avoid simultaneous iteration and modification
QQuickPixmapData *m_unreferencedPixmaps = nullptr;
QQuickPixmapData *m_lastUnreferencedPixmap = nullptr;
int m_unreferencedCost = 0;
int m_timerId = -1;
bool m_destroying = false;
friend class QQuickPixmap;
friend class QQuickPixmapData;
friend class tst_qquickpixmapcache;
friend class tst_qquicktext;
friend class tst_qquicktextedit;
};
QT_END_NAMESPACE
#endif // QQUICKPIXMAPCACHE_H
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