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vsync(3)			 Allegro manual 			vsync(3)

NAME
     vsync - Waits for a vertical retrace to begin. Allegro game programming li-
     brary.

SYNOPSIS
     #include <allegro.h>

     void vsync();

DESCRIPTION
     Waits  for  a vertical retrace to begin. The retrace happens when the elec-
     tron beam in your monitor has reached the bottom of the screen and is  mov-
     ing  back	to  the top ready for another scan. During this short period the
     graphics card isn't sending any data to the monitor, so you can  do  things
     to  it  that  aren't  possible at other times, such as altering the palette
     without causing flickering (snow). Allegro will automatically  wait  for  a
     retrace  before  altering	the  palette  or  doing  any hardware scrolling,
     though, so you don't normally need to bother with this function.

SEE ALSO
     set_palette(3), scroll_screen(3)

Allegro 			  version 4.4.3 			vsync(3)

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