1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>
#include <qfont.h>
#include <private/qfont_p.h>
#include <private/qfontengine_p.h>
class tst_QFontCache : public QObject
{
Q_OBJECT
public:
tst_QFontCache();
virtual ~tst_QFontCache();
private slots:
void clear();
};
QT_BEGIN_NAMESPACE
extern void qt_setQtEnableTestFont(bool value); // qfontdatabase.cpp
#ifdef QT_BUILD_INTERNAL
// qfontengine.cpp
extern void QFontEngine_startCollectingEngines();
extern QList<QFontEngine *> QFontEngine_stopCollectingEngines();
#endif
QT_END_NAMESPACE
tst_QFontCache::tst_QFontCache()
{
}
tst_QFontCache::~tst_QFontCache()
{
}
void tst_QFontCache::clear()
{
#ifdef QT_BUILD_INTERNAL
QFontEngine_startCollectingEngines();
#else
// must not crash, at very least ;)
#endif
QFontEngine *fontEngine = 0;
{
// we're never caching the box (and the "test") font engines
// let's ensure we're not leaking them as well as the cached ones
qt_setQtEnableTestFont(true);
QFont f;
f.setFamily("__Qt__Box__Engine__");
f.exactMatch(); // loads engine
}
{
QFontDatabase db;
QFont f;
f.setStyleHint(QFont::Serif);
const QString familyForHint(f.defaultFamily());
// it should at least return a family that is available
QVERIFY(db.hasFamily(familyForHint));
f.exactMatch(); // loads engine
fontEngine = QFontPrivate::get(f)->engineForScript(QChar::Script_Common);
QVERIFY(fontEngine);
QVERIFY(QFontCache::instance()->engineCacheCount.value(fontEngine) > 0); // ensure it is cached
// acquire the engine to use it somewhere else:
// (e.g. like the we do in QFontSubset() or like QRawFont does in fromFont())
fontEngine->ref.ref();
// cache the engine once again; there is a special case when the engine is cached more than once
QFontCache::instance()->insertEngine(QFontCache::Key(QFontDef(), 0, 0), fontEngine);
}
// use it:
// e.g. fontEngine->stringToCMap(..);
// and whilst it is alive, don't hesitate to add/remove the app-local fonts:
// (QFontDatabase::{add,remove}ApplicationFont() clears the cache)
QFontCache::instance()->clear();
// release the acquired engine:
if (fontEngine) {
if (!fontEngine->ref.deref())
delete fontEngine;
fontEngine = 0;
}
// we may even exit the application now:
QFontCache::instance()->cleanup();
#ifdef QT_BUILD_INTERNAL
QList<QFontEngine *> leakedEngines = QFontEngine_stopCollectingEngines();
for (int i = 0; i < leakedEngines.size(); ++i) qWarning() << i << leakedEngines.at(i) << leakedEngines.at(i)->ref.load();
// and we are not leaking!
QCOMPARE(leakedEngines.size(), 0);
#endif
}
QTEST_MAIN(tst_QFontCache)
#include "tst_qfontcache.moc"
|
