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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd and/or its subsidiary(-ies).
+** 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 QT3DRENDER_RENDER_RESOURCEACCESSOR_P_H
+#define QT3DRENDER_RENDER_RESOURCEACCESSOR_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/qnodeid.h>
+
+#include <private/qt3drender_global_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QMutex;
+
+namespace Qt3DRender
+{
+namespace Render {
+
+class TextureManager;
+class AttachmentManager;
+class GLTextureManager;
+class EntityManager;
+class NodeManagers;
+
+class RenderBackendResourceAccessor
+{
+public:
+    enum ResourceType {
+        OGLTexture,
+        OutputAttachment,
+        EntityHandle,
+    };
+
+    virtual ~RenderBackendResourceAccessor();
+    virtual bool accessResource(ResourceType type, Qt3DCore::QNodeId nodeId, void **handle, QMutex **lock) = 0;
+};
+
+class QT3DRENDERSHARED_PRIVATE_EXPORT ResourceAccessor : public RenderBackendResourceAccessor
+{
+public:
+    ResourceAccessor(NodeManagers *mgr);
+    bool accessResource(ResourceType type, Qt3DCore::QNodeId nodeId, void **handle, QMutex **lock) Q_DECL_FINAL;
+private:
+    GLTextureManager *m_glTextureManager;
+    TextureManager *m_textureManager;
+    AttachmentManager *m_attachmentManager;
+    EntityManager *m_entityManager;
+};
+
+} // namespace Render
+} // namespace Qt3DRender
+
+QT_END_NAMESPACE
+
+#endif // QT3DRENDER_RENDER_RESOURCEACCESSOR_P_H