#include <QtOpenGL/qgl.h>
#ifndef QGL_H
class QGLFormat{
   /* Some contents are skipped to improve readability */
   public: enum OpenGLVersionFlag{
      OpenGL_Version_None = 0,
      OpenGL_Version_1_1 = 1,
      OpenGL_Version_1_2 = 2,
      OpenGL_Version_1_3 = 4,
      OpenGL_Version_1_4 = 8,
      OpenGL_Version_1_5 = 16,
      OpenGL_Version_2_0 = 32,
      OpenGL_Version_2_1 = 64,
      OpenGL_ES_Common_Version_1_0 = 128,
      OpenGL_ES_CommonLite_Version_1_0 = 256,
      OpenGL_ES_Common_Version_1_1 = 512,
      OpenGL_ES_CommonLite_Version_1_1 = 1024,
      OpenGL_ES_Version_2_0 = 2048,
   };
   /* ... */
};
#endif // QGL_H