static void glDrawElements(void *, GLenum, int, GLenum, const void *);
static void glDrawRangeElements(void *, GLenum, unsigned, unsigned, int, GLenum, const void *);
static void glXSwapBuffers(void *, Display *, GLXDrawable);
static void glDrawElements(void *, GLenum, int, GLenum, const void *);
static void glDrawRangeElements(void *, GLenum, unsigned, unsigned, int, GLenum, const void *);
static void glXSwapBuffers(void *, Display *, GLXDrawable);