glutSwapInterval(3)		    freeglut		     glutSwapInterval(3)

NAME
     glutSwapInterval  -  controls  synchronization of buffer swaps with display
     (v-sync).

SYNTAX
     void glutSwapInterval(int interval);

ARGUMENTS
     interval  number of vertical blanking periods to wait for before swapping.

DESCRIPTION
     An interval of 0 requests no synchronization, buffers should be swapped im-
     mediately, even if the display device is in the middle of scanning out  the
     previous frame. This may result in visible artifacts (tearing).

     An interval of 1 is the standard v-sync setting. The swap is performed dur-
     ing  the next vertical blanking period, after the current frame is done be-
     ing scanned out to the display. Any other positive interval greater than 1,
     will wait for that many v-blank periods before swapping.

     Negative interval values are for ``adaptive v-sync''. If  drawing	is  com-
     pleted  and the swap is ready to be executed before the target v-blank, the
     swap will be performed at the target v-blank, exactly as if the  `interval`
     was  positive.  If	 the target interval has elapsed and the swap is running
     late, instead of waiting more, the swap will be performed immediately,  un-
     synchronzied with the display.

     Not  all  GL  implementations support all of these semantics. Freeglut will
     attempt to fall-back to the nearest-equivalent supported swap interval.  If
     adaptive  v-sync is not supported, negative values will be flipped to their
     positive equivalent. If running unsynchronized is not possible, an interval
     of 1 will be used instead.

SEE ALSO
     glutSwapBuffers

AUTHOR
     John Tsiombikas (nuclear@mutantstargoat.com)

freeglut			  October 2025		     glutSwapInterval(3)