#define GLAPI // Define GL_GLEXT_PROTOTYPES so that the OpenGL extension prototypes in // "glext.h" are parsed. #define GL_GLEXT_PROTOTYPES #include <GL/gl.h> // Define GLX_GLXEXT_PROTOTYPES so that the OpenGL GLX extension prototypes in // "glxext.h" are parsed. #define GLX_GLXEXT_PROTOTYPES #include <X11/Xlib.h> #include <X11/Xutil.h> #include <GL/glxext.h>