#include <stdio.h>
-#include <stdlib.h>
-#include <QOpenGLContext>
+#include <QGL>
#include <QOffscreenSurface>
-#include <QWindow>
-#include <QGLWidget>
+#include <QOpenGLContext>
+#include <QSurfaceFormat>
+
+class QSurface;
QGLWidget *global_share_widget = nullptr;