gui_set_screen man page on DragonFly

gui_set_screen man page on DragonFly

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gui_set_screen(3)		Allegro manual		     gui_set_screen(3)

NAME
       gui_set_screen - Changes the bitmap surface GUI routines draw to. Alle‐
       gro game programming library.

SYNOPSIS
       #include <allegro.h>

       void gui_set_screen(BITMAP *bmp);

DESCRIPTION
       This function can be used to change the bitmap surface the GUI routines
       draw to. This can be useful if you are using a double buffering or page
       flipping system. Passing NULL will cause the default  surface  (screen)
       to be used again. Example:

	  BITMAP *page[2];

	  /* Allocate two pages of video memory */
	  page[0] = create_video_bitmap(SCREEN_W, SCREEN_H);
	  page[1] = create_video_bitmap(SCREEN_W, SCREEN_H);

	  /* Page flip */
	  show_video_bitmap(page[0]);
	  gui_set_screen(page[0]);

SEE ALSO
       gui_get_screen(3)

Allegro				 version 4.4.2		     gui_set_screen(3)

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