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/****************************************************************************
**
** Copyright (C) 2012 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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"
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