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

       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.

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

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)

Allegro                                           version 4.4.3                                exupdate(3alleg4)

#include<allegro.h>Exampleexupdate