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diff --git a/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.h b/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.h
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+++ b/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtGui 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 QPLATFORMBACKINGSTOREOPENGLSUPPORT_H
+#define QPLATFORMBACKINGSTOREOPENGLSUPPORT_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is part of the QPA API and is not meant to be used
+// in applications. Usage of this API may make your code
+// source and binary incompatible with future versions of Qt.
+//
+
+#ifndef QT_NO_OPENGL
+
+#include <QtGui/qtguiglobal.h>
+#include <qpa/qplatformbackingstore.h>
+
+#include <QtGui/QOpenGLContext>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLTextureBlitter;
+class QOpenGLBackingStore;
+
+class QPlatformBackingStoreOpenGLSupport : public QPlatformBackingStoreOpenGLSupportBase
+{
+public:
+    explicit QPlatformBackingStoreOpenGLSupport(QPlatformBackingStore *backingStore) : backingStore(backingStore) {}
+    ~QPlatformBackingStoreOpenGLSupport() override;
+    void composeAndFlush(QWindow *window, const QRegion &region, const QPoint &offset,
+                         QPlatformTextureList *textures, bool translucentBackground) override;
+    GLuint toTexture(const QRegion &dirtyRegion, QSize *textureSize, QPlatformBackingStore::TextureFlags *flags) const override;
+
+private:
+    QPlatformBackingStore *backingStore = nullptr;
+    QScopedPointer<QOpenGLContext> context;
+    mutable GLuint textureId = 0;
+    mutable QSize textureSize;
+    mutable bool needsSwizzle = false;
+    mutable bool premultiplied = false;
+    QOpenGLTextureBlitter *blitter = nullptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_OPENGL
+
+#endif // QPLATFORMBACKINGSTOREOPENGLSUPPORT_H