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al_wait_for_vsync(3)	   Library Functions Manual	  al_wait_for_vsync(3)

NAME
       al_wait_for_vsync - Allegro 5 API

SYNOPSIS
	      #include <allegro5/allegro.h>

	      bool al_wait_for_vsync(void)

DESCRIPTION
       Wait for	the beginning of a vertical retrace.  Some driver/card/monitor
       combinations may	not be capable of this.

       Note  how al_flip_display(3) usually already waits for the vertical re-
       trace, so unless	you are	doing something	special, there is no reason to
       call this function.

       Returns false if	not possible, true if successful.

SEE ALSO
       al_flip_display(3)

Allegro	reference manual				  al_wait_for_vsync(3)

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<https://man.freebsd.org/cgi/man.cgi?query=al_wait_for_vsync&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>

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