create_video_bitmap(3alleg4) [debian man page]

create_video_bitmap(3alleg4)					  Allegro manual				      create_video_bitmap(3alleg4)

NAME

       create_video_bitmap - Creates a video memory bitmap. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       BITMAP *create_video_bitmap(int width, int height);

DESCRIPTION

       Allocates  a  video  memory  bitmap  of the specified size. This can be used to allocate offscreen video memory for storing source graphics
       ready for a hardware accelerated blitting operation, or to create multiple video memory pages  which  can  then	be  displayed  by  calling
       show_video_bitmap().  Read the introduction of this chapter for a comparison with other types of bitmaps and other specific details.

       Warning:  video memory bitmaps are usually allocated from the same space as the screen bitmap, so they may overlap with it; it is therefore
       not a good idea to use the global screen at the same time as any surfaces returned by this function.

RETURN VALUE

       Returns a pointer to the bitmap on success, or NULL if you have run out of video ram. Remember to destroy this bitmap before any subsequent
       call to set_gfx_mode().

SEE ALSO

       create_bitmap(3alleg4),	 create_bitmap_ex(3alleg4),  create_system_bitmap(3alleg4),  create_sub_bitmap(3alleg4),  destroy_bitmap(3alleg4),
       screen(3alleg4),     show_video_bitmap(3alleg4),      gfx_capabilities(3alleg4),      is_video_bitmap(3alleg4),	    clear_bitmap(3alleg4),
       clear_to_color(3alleg4), ex3buf(3alleg4), exaccel(3alleg4), exflip(3alleg4), exupdate(3alleg4)

Allegro 							   version 4.4.2				      create_video_bitmap(3alleg4)

exupdate(3alleg4)                                                 Allegro manual                                                 exupdate(3alleg4)

NAME

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

SYNOPSIS

       #include <allegro.h>

       Example exupdate

DESCRIPTION

       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.

SEE ALSO

       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_bit-
       map(3alleg4),  desktop_palette(3alleg4),  destroy_bitmap(3alleg4),  enable_triple_buffer(3alleg4),  fixcos(3alleg4),  fixed(3alleg4),  fix-
       mul(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),   key-
       pressed(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 4.4.2                                                 exupdate(3alleg4)