Expose the scene graph publically through a QSGEngine class

This change wraps QSGRenderContext and QSGContext in a new QSGEngine
class, and expose a public interface of QSGRenderer through a
QSGAbstractRenderer to make it usable on a standalone window or FBO.

Change-Id: I2d41187472424f5ea64650a006bcd61f2711f6b9
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/quick/scenegraph/util/qsgengine_p.h b/src/quick/scenegraph/util/qsgengine_p.h
new file mode 100644
index 0000000000..a7e1599fd5
--- /dev/null
+++ b/src/quick/scenegraph/util/qsgengine_p.h
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQuick 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 QSGENGINE_P_H
+#define QSGENGINE_P_H
+
+#include "qsgengine.h"
+#include <private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QSGContext;
+class QSGRenderContext;
+
+class QSGEnginePrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QSGEngine)
+
+public:
+    QSGEnginePrivate();
+
+    QScopedPointer<QSGContext> sgContext;
+    QScopedPointer<QSGRenderContext> sgRenderContext;
+};
+
+QT_END_NAMESPACE
+
+#endif // QSGENGINE_P_H