gui_set_screen (3) Linux Manual Page
gui_set_screen – Changes the bitmap surface GUI routines draw to. Allegro 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]);