diff options
author | Marc Mutz <marc.mutz@kdab.com> | 2015-04-14 09:37:58 +0200 |
---|---|---|
committer | Marc Mutz <marc.mutz@kdab.com> | 2015-05-26 17:51:47 +0000 |
commit | 16b95b65a6fea501dade6e3f5f1ad48f7dfaa173 (patch) | |
tree | 9e9d8858160bc5a1e066492fff0364ff0b4f778f /src/gui/text | |
parent | 10d53a3f0e09ec2ef437619bb1bb0dbb40f7ee8b (diff) |
Q*GlyphCache: de-inline dtor and export vtable
The destructor is the first virtual method. By not defining it
out-of-line, we provoke multiple copies of vtables, not all of
which can be merged by the linker. If the linker fails, RTTI
such as dynamic_cast and catch-blocks involving the type will
not work.
Additionally, QFontEngineGlyphCache was not exported, and
therefore also not its vtable, making it impossible for
users outside of QtGui to get a unique RTTI for the class.
Change-Id: Ib265945934216bb609629431eb4c71996d4fd39d
Reported-by: Volker Krause <volker.krause@kdab.com>
Task-number: QTBUG-45582
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Diffstat (limited to 'src/gui/text')
-rw-r--r-- | src/gui/text/qfontengineglyphcache.cpp | 43 | ||||
-rw-r--r-- | src/gui/text/qfontengineglyphcache_p.h | 4 | ||||
-rw-r--r-- | src/gui/text/text.pri | 1 |
3 files changed, 46 insertions, 2 deletions
diff --git a/src/gui/text/qfontengineglyphcache.cpp b/src/gui/text/qfontengineglyphcache.cpp new file mode 100644 index 0000000000..f6fdfa3ce3 --- /dev/null +++ b/src/gui/text/qfontengineglyphcache.cpp @@ -0,0 +1,43 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the QtGui module 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 The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/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. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <private/qfontengineglyphcache_p.h> + +QT_BEGIN_NAMESPACE + +// out-of-line to avoid vtable duplication, breaking e.g. RTTI +QFontEngineGlyphCache::~QFontEngineGlyphCache() +{ +} + +QT_END_NAMESPACE diff --git a/src/gui/text/qfontengineglyphcache_p.h b/src/gui/text/qfontengineglyphcache_p.h index 6cf4d2f1ba..def42c22a3 100644 --- a/src/gui/text/qfontengineglyphcache_p.h +++ b/src/gui/text/qfontengineglyphcache_p.h @@ -56,7 +56,7 @@ QT_BEGIN_NAMESPACE -class QFontEngineGlyphCache: public QSharedData +class Q_GUI_EXPORT QFontEngineGlyphCache: public QSharedData { public: QFontEngineGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix) : m_format(format), m_transform(matrix) @@ -64,7 +64,7 @@ public: Q_ASSERT(m_format != QFontEngine::Format_None); } - virtual ~QFontEngineGlyphCache() { } + virtual ~QFontEngineGlyphCache(); QFontEngine::GlyphFormat glyphFormat() const { return m_format; } const QTransform &transform() const { return m_transform; } diff --git a/src/gui/text/text.pri b/src/gui/text/text.pri index 61e239f678..087927549f 100644 --- a/src/gui/text/text.pri +++ b/src/gui/text/text.pri @@ -47,6 +47,7 @@ HEADERS += \ SOURCES += \ text/qfont.cpp \ text/qfontengine.cpp \ + text/qfontengineglyphcache.cpp \ text/qfontsubset.cpp \ text/qfontmetrics.cpp \ text/qfontdatabase.cpp \ |