NAME

       show_video_bitmap  -  Flips  the  hardware  screen  to  use  the specified page. Allegro game programming
       library.

SYNOPSIS

       #include <allegro.h>

       int show_video_bitmap(BITMAP *bitmap);

DESCRIPTION

       Attempts to page flip the hardware screen to display the specified video bitmap object, which must be the
       same  size  as  the  physical  screen, and should have been obtained by calling the create_video_bitmap()
       function.

       Allegro will handle any necessary vertical retrace synchronisation when page flipping, so you don't  need
       to call vsync() before it. This means that show_video_bitmap() has the same time delay effects as vsync()
       by default. This can be adjusted with the  "disable_vsync"  config  key  in  the  [graphics]  section  of
       allegro.cfg. Example:

          int current_page;
          BITMAP *video_page[2];
          ...
          /* Create pages for page flipping */
          video_page[0] = create_video_bitmap(SCREEN_W, SCREEN_H);
          video_page[1] = create_video_bitmap(SCREEN_W, SCREEN_H);
          current_page = 0;
          ...
          /* draw the screen and flip pages */
          draw_screen(video_page[current_page]);
          show_video_bitmap(video_page[current_page]);
          current_page = (current_page+1)%2;
          ...

RETURN VALUE

       Returns zero on success and non-zero on failure.

SEE ALSO

       scroll_screen(3alleg4),       create_video_bitmap(3alleg4),       exaccel(3alleg4),      exflip(3alleg4),
       exupdate(3alleg4)