Make QSGNode and friends extensible via a d-pointer

Convert the private void *m_reserved to a d_ptr so as to make QSGNode
inherited classes extensible without breaking binary compatibility.
QSGNode and subclasses do not create a private instance by default.

This is required by a follow-up commit where a new member needs to be
added to QSGSimpleTextureNode. Protected ctors have been added to the
superclasses of QSGSimpleTextureNode in the usual fashion.

Change-Id: I30c5f5d057654145d87f18c34c5d13a6ff5f7b11
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/quick/scenegraph/coreapi/qsgnode_p.h b/src/quick/scenegraph/coreapi/qsgnode_p.h
new file mode 100644
index 0000000000..b0d8088af2
--- /dev/null
+++ b/src/quick/scenegraph/coreapi/qsgnode_p.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB)
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSGNODE_P_H
+#define QSGNODE_P_H
+
+#include <qglobal.h>
+
+QT_BEGIN_NAMESPACE
+
+class QSGNodePrivate
+{
+public:
+    QSGNodePrivate() {}
+    virtual ~QSGNodePrivate() {}
+};
+
+
+class QSGBasicGeometryNodePrivate : public QSGNodePrivate
+{
+public:
+    QSGBasicGeometryNodePrivate()
+        : QSGNodePrivate()
+    {}
+};
+
+
+class QSGGeometryNodePrivate: public QSGBasicGeometryNodePrivate
+{
+public:
+    QSGGeometryNodePrivate()
+        : QSGBasicGeometryNodePrivate()
+    {}
+};
+
+QT_END_NAMESPACE
+
+#endif // QSGNODE_P_H