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+/****************************************************************************
+**
+** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt3D 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DEXTRAS_QTEXT2DENTITY_P_H
+#define QT3DEXTRAS_QTEXT2DENTITY_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <Qt3DCore/private/qentity_p.h>
+#include <Qt3DExtras/private/distancefieldtextrenderer_p.h>
+#include <Qt3DExtras/private/qdistancefieldglyphcache_p.h>
+#include <QFont>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DCore {
+class QScene;
+}
+
+namespace Qt3DRender {
+class QGeometryRenderer;
+class QGeometry;
+class QMaterial;
+class QAttribute;
+class QBuffer;
+}
+
+namespace Qt3DExtras {
+
+class QText2DMaterial;
+class QText2DEntity;
+
+class QText2DEntityPrivate : public Qt3DCore::QEntityPrivate
+{
+public:
+    QText2DEntityPrivate();
+    ~QText2DEntityPrivate();
+
+    Q_DECLARE_PUBLIC(QText2DEntity)
+
+    // keep track of the glyphs currently being displayed,
+    // to guarantee proper glyph ref-counting in the
+    // QDistanceFieldGlyphCache
+    QVector<QGlyphRun> m_currentGlyphRuns;
+    QDistanceFieldGlyphCache *m_glyphCache;
+
+    void setScene(Qt3DCore::QScene *scene) Q_DECL_OVERRIDE;
+
+    QFont m_font;
+    QFont m_scaledFont; // ignore point or pixel size, set to default value
+
+    QColor m_color;
+    QString m_text;
+    float m_width;
+    float m_height;
+
+    QVector<DistanceFieldTextRenderer*> m_renderers;
+
+    float computeActualScale() const;
+
+    void setCurrentGlyphRuns(const QVector<QGlyphRun> &runs);
+    void update();
+
+    struct CacheEntry
+    {
+        QDistanceFieldGlyphCache *glyphCache = nullptr;
+        int count = 0;
+    };
+
+    static QHash<Qt3DCore::QScene *, CacheEntry> m_glyphCacheInstances;
+};
+
+} // namespace Qt3DExtras
+
+QT_END_NAMESPACE
+
+#endif // QT3DEXTRAS_QTEXT2DENTITY_P_H