Function SDL_InitSubSystem

deps/SDL2/src/SDL.c:141–286

}

int
SDL_InitSubSystem(Uint32 flags)
{
    if (!SDL_MainIsReady) {
        SDL_SetError("Application didn't initialize properly, did you include SDL_main.h in the file containing your main() function?");
        return -1;
    }

    /* Clear the error message */
    SDL_ClearError();

    if ((flags & SDL_INIT_GAMECONTROLLER)) {
        /* game controller implies joystick */
        flags |= SDL_INIT_JOYSTICK;
    }

    if ((flags & (SDL_INIT_VIDEO|SDL_INIT_JOYSTICK))) {
        /* video or joystick implies events */
        flags |= SDL_INIT_EVENTS;
    }

#if SDL_VIDEO_DRIVER_WINDOWS
    if ((flags & (SDL_INIT_HAPTIC|SDL_INIT_JOYSTICK))) {
        if (SDL_HelperWindowCreate() < 0) {
            return -1;
        }
    }
#endif

#if !SDL_TIMERS_DISABLED
    SDL_TicksInit();
#endif

    /* Initialize the event subsystem */
    if ((flags & SDL_INIT_EVENTS)) {
#if !SDL_EVENTS_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_EVENTS)) {
            if (SDL_EventsInit() < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_EVENTS);
#else
        return SDL_SetError("SDL not built with events support");
#endif
    }

    /* Initialize the timer subsystem */
    if ((flags & SDL_INIT_TIMER)){
#if !SDL_TIMERS_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_TIMER)) {
            if (SDL_TimerInit() < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_TIMER);
#else
        return SDL_SetError("SDL not built with timer support");