1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QPIXMAPCACHE_H
5#define QPIXMAPCACHE_H
6
7#include <QtGui/qtguiglobal.h>
8#include <QtGui/qpixmap.h>
9
10QT_BEGIN_NAMESPACE
11
12
13class Q_GUI_EXPORT QPixmapCache
14{
15public:
16 class KeyData;
17 class Q_GUI_EXPORT Key
18 {
19 public:
20 Key();
21 Key(const Key &other);
22 Key(Key &&other) noexcept : d(other.d) { other.d = nullptr; }
23 Key &operator =(Key &&other) noexcept { swap(other); return *this; }
24 ~Key();
25 bool operator ==(const Key &key) const;
26 inline bool operator !=(const Key &key) const
27 { return !operator==(key); }
28 Key &operator =(const Key &other);
29
30 void swap(Key &other) noexcept { qt_ptr_swap(lhs&: d, rhs&: other.d); }
31 bool isValid() const noexcept;
32
33 private:
34 friend size_t qHash(const QPixmapCache::Key &k, size_t seed = 0) noexcept
35 { return k.hash(seed); }
36 size_t hash(size_t seed) const noexcept;
37
38 KeyData *d;
39 friend class QPMCache;
40 friend class QPixmapCache;
41 };
42
43 static int cacheLimit();
44 static void setCacheLimit(int);
45 static bool find(const QString &key, QPixmap *pixmap);
46 static bool find(const Key &key, QPixmap *pixmap);
47 static bool insert(const QString &key, const QPixmap &pixmap);
48 static Key insert(const QPixmap &pixmap);
49#if QT_DEPRECATED_SINCE(6, 6)
50 QT_DEPRECATED_VERSION_X_6_6("Use remove(key), followed by key = insert(pixmap).")
51 QT_GUI_INLINE_SINCE(6, 6)
52 static bool replace(const Key &key, const QPixmap &pixmap);
53#endif
54 static void remove(const QString &key);
55 static void remove(const Key &key);
56 static void clear();
57};
58Q_DECLARE_SHARED(QPixmapCache::Key)
59
60#if QT_DEPRECATED_SINCE(6, 6)
61#if QT_GUI_INLINE_IMPL_SINCE(6, 6)
62bool QPixmapCache::replace(const Key &key, const QPixmap &pixmap)
63{
64 if (!key.isValid())
65 return false;
66 remove(key);
67 const_cast<Key&>(key) = insert(pixmap);
68 return key.isValid();
69}
70#endif // QT_GUI_INLINE_IMPL_SINCE(6, 6)
71#endif // QT_DEPRECATED_SINCE(6, 6)
72
73QT_END_NAMESPACE
74
75#endif // QPIXMAPCACHE_H
76

source code of qtbase/src/gui/image/qpixmapcache.h