diff --git a/Telegram/SourceFiles/qt_functions.cpp b/Telegram/SourceFiles/qt_functions.cpp
new file mode 100644
index 0000000..4a722b8
--- /dev/null
+++ b/Telegram/SourceFiles/qt_functions.cpp
@@ -0,0 +1,94 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file contains some parts 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/* TODO: find a dynamic library with these symbols. */
+
+/* Debian maintainer: this function is taken from qfiledialog.cpp */
+/*
+    Makes a list of filters from ;;-separated text.
+    Used by the mac and windows implementations
+*/
+QStringList qt_make_filter_list(const QString &filter)
+{
+    QString f(filter);
+
+    if (f.isEmpty())
+        return QStringList();
+
+    QString sep(QLatin1String(";;"));
+    int i = f.indexOf(sep, 0);
+    if (i == -1) {
+        if (f.indexOf(QLatin1Char('\n'), 0) != -1) {
+            sep = QLatin1Char('\n');
+            i = f.indexOf(sep, 0);
+        }
+    }
+
+    return f.split(sep);
+}
+
+/* Debian maintainer: this constructor is taken from qtextengine.cpp for TextPainter::drawLine */
+QTextItemInt::QTextItemInt(const QGlyphLayout &g, QFont *font, const QChar *chars_, int numChars, QFontEngine *fe, const QTextCharFormat &format)
+    : flags(0), justified(false), underlineStyle(QTextCharFormat::NoUnderline), charFormat(format),
+      num_chars(numChars), chars(chars_), logClusters(0), f(font),  glyphs(g), fontEngine(fe)
+{
+}
+
+/* Debian maintainer: this method is also taken from qtextengine.cpp */
+// Fix up flags and underlineStyle with given info
+void QTextItemInt::initWithScriptItem(const QScriptItem &si)
+{
+    // explicitly initialize flags so that initFontAttributes can be called
+    // multiple times on the same TextItem
+    flags = 0;
+    if (si.analysis.bidiLevel %2)
+        flags |= QTextItem::RightToLeft;
+    ascent = si.ascent;
+    descent = si.descent;
+
+    if (charFormat.hasProperty(QTextFormat::TextUnderlineStyle)) {
+        underlineStyle = charFormat.underlineStyle();
+    } else if (charFormat.boolProperty(QTextFormat::FontUnderline)
+               || f->d->underline) {
+        underlineStyle = QTextCharFormat::SingleUnderline;
+    }
+
+    // compat
+    if (underlineStyle == QTextCharFormat::SingleUnderline)
+        flags |= QTextItem::Underline;
+
+    if (f->d->overline || charFormat.fontOverline())
+        flags |= QTextItem::Overline;
+    if (f->d->strikeOut || charFormat.fontStrikeOut())
+        flags |= QTextItem::StrikeOut;
+}