+void
+set_video_mode() {
+ Uint32 flag;
+
+ // Attempt to get the required video size
+ flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
+ if(opt_fullscreen) flag |= SDL_FULLSCREEN;
+ surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
+}
+
+void
+toggle_fullscreen() {
+ opt_fullscreen = 1 - opt_fullscreen;
+ set_video_mode();
+}
+
+