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diff --git a/modules/render/render_osg_viewer.h b/modules/render/render_osg_viewer.h
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+++ b/modules/render/render_osg_viewer.h
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+/*
+ * render_osg_viewer.h -  renders a single view on to a single scene
+ *
+ *  Copyright (c) 2018 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: Zong Wei <wei.zong@intel.com>
+ */
+
+#ifndef XCAM_OSG_RENDER_VIEWER_H
+#define XCAM_OSG_RENDER_VIEWER_H
+
+#include <osgViewer/Viewer>
+#include <osgViewer/ViewerEventHandlers>
+#include <osgGA/StandardManipulator>
+
+#include <interface/data_types.h>
+#include <interface/stitcher.h>
+#include <xcam_mutex.h>
+#include <xcam_thread.h>
+
+namespace XCam {
+
+class RenderOsgModel;
+
+class RenderOsgViewer
+    : public Thread
+{
+public:
+
+    explicit RenderOsgViewer ();
+
+    virtual ~RenderOsgViewer ();
+
+    osgViewer::Viewer *get_viewer () {
+        return _viewer;
+    }
+
+    void set_camera_manipulator (osg::ref_ptr<osgGA::StandardManipulator> &manipulator);
+
+    void add_model (SmartPtr<RenderOsgModel> &model);
+    void validate_model_groups ();
+
+    void start_render ();
+    void stop_render ();
+
+protected:
+    virtual bool loop ();
+
+private:
+    XCAM_DEAD_COPY (RenderOsgViewer);
+    XCamReturn initialize ();
+
+private:
+    osg::ref_ptr<osgViewer::Viewer> _viewer;
+    SmartPtr<RenderOsgModel> _model_groups;
+    bool _initialized;
+};
+
+} // namespace XCam
+
+#endif // XCAM_OSG_RENDER_VIEWER_H