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 QICON_P_H
5#define QICON_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtGui/private/qtguiglobal_p.h>
19#include <QtCore/qsize.h>
20#include <QtCore/qlist.h>
21#include <QtGui/qpixmap.h>
22#include <QtGui/qicon.h>
23#include <QtGui/qiconengine.h>
24
25#ifndef QT_NO_ICON
26QT_BEGIN_NAMESPACE
27
28class QIconPrivate
29{
30public:
31 explicit QIconPrivate(QIconEngine *e);
32
33 ~QIconPrivate() {
34 delete engine;
35 }
36
37 static qreal pixmapDevicePixelRatio(qreal displayDevicePixelRatio, const QSize &requestedSize, const QSize &actualSize);
38
39 QIconEngine *engine;
40
41 QAtomicInt ref;
42 int serialNum;
43 int detach_no;
44 bool is_mask;
45
46 static void clearIconCache();
47};
48
49
50struct QPixmapIconEngineEntry
51{
52 QPixmapIconEngineEntry() = default;
53 QPixmapIconEngineEntry(const QPixmap &pm, QIcon::Mode m, QIcon::State s)
54 : pixmap(pm), size(pm.size()), mode(m), state(s) {}
55 QPixmapIconEngineEntry(const QString &file, const QSize &sz, QIcon::Mode m, QIcon::State s)
56 : fileName(file), size(sz), mode(m), state(s) {}
57 QPixmapIconEngineEntry(const QString &file, const QImage &image, QIcon::Mode m, QIcon::State s);
58 QPixmap pixmap;
59 QString fileName;
60 QSize size;
61 QIcon::Mode mode = QIcon::Normal;
62 QIcon::State state = QIcon::Off;
63};
64Q_DECLARE_TYPEINFO(QPixmapIconEngineEntry, Q_RELOCATABLE_TYPE);
65
66inline QPixmapIconEngineEntry::QPixmapIconEngineEntry(const QString &file, const QImage &image, QIcon::Mode m, QIcon::State s)
67 : fileName(file), size(image.size()), mode(m), state(s)
68{
69 pixmap.convertFromImage(img: image);
70}
71
72class Q_GUI_EXPORT QPixmapIconEngine : public QIconEngine {
73public:
74 QPixmapIconEngine();
75 QPixmapIconEngine(const QPixmapIconEngine &);
76 ~QPixmapIconEngine();
77 void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) override;
78 QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
79 QPixmap scaledPixmap(const QSize &size, QIcon::Mode mode, QIcon::State state, qreal scale) override;
80 QPixmapIconEngineEntry *bestMatch(const QSize &size, qreal scale, QIcon::Mode mode, QIcon::State state);
81 QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
82 QList<QSize> availableSizes(QIcon::Mode mode, QIcon::State state) override;
83 void addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state) override;
84 void addFile(const QString &fileName, const QSize &size, QIcon::Mode mode, QIcon::State state) override;
85 bool isNull() override;
86
87 QString key() const override;
88 QIconEngine *clone() const override;
89 bool read(QDataStream &in) override;
90 bool write(QDataStream &out) const override;
91
92 static inline QSize adjustSize(const QSize &expectedSize, QSize size)
93 {
94 if (!size.isNull() && (size.width() > expectedSize.width() || size.height() > expectedSize.height()))
95 size.scale(s: expectedSize, mode: Qt::KeepAspectRatio);
96 return size;
97 }
98
99private:
100 void removePixmapEntry(QPixmapIconEngineEntry *pe)
101 {
102 auto idx = pixmaps.size();
103 while (--idx >= 0) {
104 if (pe == &pixmaps.at(i: idx)) {
105 pixmaps.remove(i: idx);
106 return;
107 }
108 }
109 }
110 QPixmapIconEngineEntry *tryMatch(const QSize &size, qreal scale, QIcon::Mode mode, QIcon::State state);
111 QList<QPixmapIconEngineEntry> pixmaps;
112
113 friend Q_GUI_EXPORT QDataStream &operator<<(QDataStream &s, const QIcon &icon);
114 friend class QIconThemeEngine;
115};
116
117QT_END_NAMESPACE
118#endif //QT_NO_ICON
119#endif // QICON_P_H
120

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