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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#import <Cocoa/Cocoa.h>
+
+#include "qscroller_p.h"
+
+#ifdef Q_WS_MAC
+
+QPointF QScrollerPrivate::realDpi(int screen)
+{
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    NSArray *nsscreens = [NSScreen screens];
+
+    if (screen < 0 || screen >= int([nsscreens count]))
+        screen = 0;
+
+    NSScreen *nsscreen = [nsscreens objectAtIndex:screen];
+    CGDirectDisplayID display = [[[nsscreen deviceDescription] objectForKey:@"NSScreenNumber"] intValue];
+
+    CGSize mmsize = CGDisplayScreenSize(display);
+    if (mmsize.width > 0 && mmsize.height > 0) {
+        return QPointF(CGDisplayPixelsWide(display) / mmsize.width,
+                       CGDisplayPixelsHigh(display) / mmsize.height) * qreal(25.4);
+    } else {
+        return QPointF();
+    }
+    [pool release];
+}
+
+#endif