Provided by: allegro4-doc_4.4.3.1-1_all bug


       exupdate  -  Supporting  different screen update methods in a single program. Allegro game
       programming library.


       #include <allegro.h>

       Example exupdate


       This program demonstrates how to support  double  buffering,  page  flipping,  and  triple
       buffering  as  options  within  a single program, and how to make things run at a constant
       rate no matter what the speed of your computer. You have to  use  this  example  from  the
       command  line  to  specify  as first parameter a number which represents the type of video
       update you want: 1 for double buffering with memory bitmaps, 2 for page  flipping,  3  for
       triple  buffering  and  4  for  double buffering with system bitmaps. After this, a dialog
       allows you to select a  screen  resolution  and  finally  you  will  see  a  kaleidoscopic
       animation, along with a frames per second counter on the top left of the screen.


       BITMAP(3alleg4),  END_OF_FUNCTION(3alleg4),  END_OF_MAIN(3alleg4), LOCK_FUNCTION(3alleg4),
       LOCK_VARIABLE(3alleg4),    PALETTE(3alleg4),     SCREEN_H(3alleg4),     SCREEN_W(3alleg4),
       acquire_bitmap(3alleg4),           allegro_error(3alleg4),          allegro_init(3alleg4),
       allegro_message(3alleg4),           bitmap_color_depth(3alleg4),            blit(3alleg4),
       clear_bitmap(3alleg4),        create_bitmap(3alleg4),       create_system_bitmap(3alleg4),
       create_video_bitmap(3alleg4),      desktop_palette(3alleg4),      destroy_bitmap(3alleg4),
       enable_triple_buffer(3alleg4),     fixcos(3alleg4),    fixed(3alleg4),    fixmul(3alleg4),
       fixsin(3alleg4),         fixtoi(3alleg4),         font(3alleg4),          ftofix(3alleg4),
       generate_332_palette(3alleg4),   gfx_capabilities(3alleg4),   gfx_mode_select_ex(3alleg4),
       install_int_ex(3alleg4),        install_keyboard(3alleg4),         install_mouse(3alleg4),
       install_timer(3alleg4),      keypressed(3alleg4),     line(3alleg4),     makecol(3alleg4),
       poll_scroll(3alleg4),       release_bitmap(3alleg4),        request_video_bitmap(3alleg4),
       screen(3alleg4),  set_color_depth(3alleg4),  set_gfx_mode(3alleg4),  set_palette(3alleg4),
       show_video_bitmap(3alleg4),          textout_ex(3alleg4),          textprintf_ex(3alleg4),
       triangle(3alleg4), vsync(3alleg4), xor_mode(3alleg4)