SDL.h File Reference

#include "SDL_main.h"
#include "SDL_stdinc.h"
#include "SDL_assert.h"
#include "SDL_atomic.h"
#include "SDL_audio.h"
#include "SDL_clipboard.h"
#include "SDL_cpuinfo.h"
#include "SDL_endian.h"
#include "SDL_error.h"
#include "SDL_events.h"
#include "SDL_filesystem.h"
#include "SDL_gamecontroller.h"
#include "SDL_haptic.h"
#include "SDL_hints.h"
#include "SDL_joystick.h"
#include "SDL_loadso.h"
#include "SDL_log.h"
#include "SDL_messagebox.h"
#include "SDL_metal.h"
#include "SDL_mutex.h"
#include "SDL_power.h"
#include "SDL_render.h"
#include "SDL_rwops.h"
#include "SDL_sensor.h"
#include "SDL_shape.h"
#include "SDL_system.h"
#include "SDL_thread.h"
#include "SDL_timer.h"
#include "SDL_version.h"
#include "SDL_video.h"
#include "SDL_locale.h"
#include "SDL_misc.h"
#include "begin_code.h"
#include "close_code.h"

Include dependency graph for SDL.h:

Go to the source code of this file.

SDL_INIT_*
These are the flags which may be passed to SDL_Init(). You should specify the subsystems which you will be using in your application.
#define	SDL_INIT_TIMER   0x00000001u
#define	SDL_INIT_AUDIO   0x00000010u
#define	SDL_INIT_VIDEO   0x00000020u
#define	SDL_INIT_JOYSTICK   0x00000200u
#define	SDL_INIT_HAPTIC   0x00001000u
#define	SDL_INIT_GAMECONTROLLER   0x00002000u
#define	SDL_INIT_EVENTS   0x00004000u
#define	SDL_INIT_SENSOR   0x00008000u
#define	SDL_INIT_NOPARACHUTE   0x00100000u
#define	SDL_INIT_EVERYTHING
int	SDL_Init (Uint32 flags)
int	SDL_InitSubSystem (Uint32 flags)
void	SDL_QuitSubSystem (Uint32 flags)
Uint32	SDL_WasInit (Uint32 flags)
void	SDL_Quit (void)

Detailed Description

Main include header for the SDL library

Definition in file SDL.h.

Macro Definition Documentation

SDL_INIT_AUDIO

#define SDL_INIT_AUDIO   0x00000010u

Definition at line 81 of file SDL.h.

SDL_INIT_EVENTS

#define SDL_INIT_EVENTS   0x00004000u

Definition at line 86 of file SDL.h.

SDL_INIT_EVERYTHING

#define SDL_INIT_EVERYTHING

Value:

                ( \
                SDL_INIT_TIMER | SDL_INIT_AUDIO | SDL_INIT_VIDEO | SDL_INIT_EVENTS | \
                SDL_INIT_JOYSTICK | SDL_INIT_HAPTIC | SDL_INIT_GAMECONTROLLER | SDL_INIT_SENSOR \
            )

Definition at line 89 of file SDL.h.

SDL_INIT_GAMECONTROLLER

#define SDL_INIT_GAMECONTROLLER   0x00002000u

SDL_INIT_GAMECONTROLLER implies SDL_INIT_JOYSTICK

Definition at line 85 of file SDL.h.

SDL_INIT_HAPTIC

#define SDL_INIT_HAPTIC   0x00001000u

Definition at line 84 of file SDL.h.

SDL_INIT_JOYSTICK

#define SDL_INIT_JOYSTICK   0x00000200u

SDL_INIT_JOYSTICK implies SDL_INIT_EVENTS

Definition at line 83 of file SDL.h.

SDL_INIT_NOPARACHUTE

#define SDL_INIT_NOPARACHUTE   0x00100000u

compatibility; this flag is ignored.

Definition at line 88 of file SDL.h.

SDL_INIT_SENSOR

#define SDL_INIT_SENSOR   0x00008000u

Definition at line 87 of file SDL.h.

SDL_INIT_TIMER

#define SDL_INIT_TIMER   0x00000001u

Definition at line 80 of file SDL.h.

SDL_INIT_VIDEO

#define SDL_INIT_VIDEO   0x00000020u

SDL_INIT_VIDEO implies SDL_INIT_EVENTS

Definition at line 82 of file SDL.h.

Function Documentation

SDL_Init()

int SDL_Init

(

Uint32

flags

)

This function initializes the subsystems specified by flags

Definition at line 299 of file SDL.c.

{
    return SDL_InitSubSystem(flags);
}

References SDL_InitSubSystem().

SDL_InitSubSystem()

int SDL_InitSubSystem

(

Uint32

flags

)

This function initializes specific SDL subsystems

Subsystem initialization is ref-counted, you must call SDL_QuitSubSystem() for each SDL_InitSubSystem() to correctly shutdown a subsystem manually (or call SDL_Quit() to force shutdown). If a subsystem is already loaded then this call will increase the ref-count and return.

Definition at line 148 of file SDL.c.

{
    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_THREAD_OS2
    SDL_OS2TLSAlloc(); /* thread/os2/SDL_systls.c */
#endif
 
#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");
#endif
    }
 
    /* Initialize the video subsystem */
    if ((flags & SDL_INIT_VIDEO)){
#if !SDL_VIDEO_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_VIDEO)) {
            if (SDL_VideoInit(NULL) < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_VIDEO);
#else
        return SDL_SetError("SDL not built with video support");
#endif
    }
 
    /* Initialize the audio subsystem */
    if ((flags & SDL_INIT_AUDIO)){
#if !SDL_AUDIO_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_AUDIO)) {
            if (SDL_AudioInit(NULL) < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_AUDIO);
#else
        return SDL_SetError("SDL not built with audio support");
#endif
    }
 
    /* Initialize the joystick subsystem */
    if ((flags & SDL_INIT_JOYSTICK)){
#if !SDL_JOYSTICK_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_JOYSTICK)) {
           if (SDL_JoystickInit() < 0) {
               return (-1);
           }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_JOYSTICK);
#else
        return SDL_SetError("SDL not built with joystick support");
#endif
    }
 
    if ((flags & SDL_INIT_GAMECONTROLLER)){
#if !SDL_JOYSTICK_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_GAMECONTROLLER)) {
            if (SDL_GameControllerInit() < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_GAMECONTROLLER);
#else
        return SDL_SetError("SDL not built with joystick support");
#endif
    }
 
    /* Initialize the haptic subsystem */
    if ((flags & SDL_INIT_HAPTIC)){
#if !SDL_HAPTIC_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_HAPTIC)) {
            if (SDL_HapticInit() < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_HAPTIC);
#else
        return SDL_SetError("SDL not built with haptic (force feedback) support");
#endif
    }
 
    /* Initialize the sensor subsystem */
    if ((flags & SDL_INIT_SENSOR)){
#if !SDL_SENSOR_DISABLED
        if (SDL_PrivateShouldInitSubsystem(SDL_INIT_SENSOR)) {
            if (SDL_SensorInit() < 0) {
                return (-1);
            }
        }
        SDL_PrivateSubsystemRefCountIncr(SDL_INIT_SENSOR);
#else
        return SDL_SetError("SDL not built with sensor support");
#endif
    }
 
    return (0);
}

References NULL, SDL_AudioInit, SDL_ClearError, SDL_EventsInit(), SDL_GameControllerInit(), SDL_HapticInit(), SDL_INIT_AUDIO, SDL_INIT_EVENTS, SDL_INIT_GAMECONTROLLER, SDL_INIT_HAPTIC, SDL_INIT_JOYSTICK, SDL_INIT_SENSOR, SDL_INIT_TIMER, SDL_INIT_VIDEO, SDL_JoystickInit(), SDL_MainIsReady, SDL_PrivateShouldInitSubsystem(), SDL_PrivateSubsystemRefCountIncr(), SDL_SensorInit(), SDL_SetError, SDL_TicksInit(), SDL_TimerInit(), and SDL_VideoInit.

Referenced by SDL_Init().

SDL_Quit()

void SDL_Quit

(

void

)

This function cleans up all initialized subsystems. You should call it upon all exit conditions.

Definition at line 89 of file SDL_dynapi_procs.h.

References SDL_AssertionsQuit(), SDL_bInMainQuit, SDL_ClearHints, SDL_FALSE, SDL_INIT_EVERYTHING, SDL_LogResetPriorities, SDL_memset, SDL_QuitSubSystem(), SDL_SubsystemRefCount, SDL_TicksQuit(), and SDL_TRUE.

SDL_QuitSubSystem()

void SDL_QuitSubSystem

(

Uint32

flags

)

This function cleans up specific SDL subsystems

Definition at line 305 of file SDL.c.

{
#if SDL_THREAD_OS2
    SDL_OS2TLSFree(); /* thread/os2/SDL_systls.c */
#endif
#if defined(__OS2__)
    SDL_OS2Quit();
#endif
 
    /* Shut down requested initialized subsystems */
#if !SDL_SENSOR_DISABLED
    if ((flags & SDL_INIT_SENSOR)) {
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_SENSOR)) {
            SDL_SensorQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_SENSOR);
    }
#endif
 
#if !SDL_JOYSTICK_DISABLED
    if ((flags & SDL_INIT_GAMECONTROLLER)) {
        /* game controller implies joystick */
        flags |= SDL_INIT_JOYSTICK;
 
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_GAMECONTROLLER)) {
            SDL_GameControllerQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_GAMECONTROLLER);
    }
 
    if ((flags & SDL_INIT_JOYSTICK)) {
        /* joystick implies events */
        flags |= SDL_INIT_EVENTS;
 
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_JOYSTICK)) {
            SDL_JoystickQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_JOYSTICK);
    }
#endif
 
#if !SDL_HAPTIC_DISABLED
    if ((flags & SDL_INIT_HAPTIC)) {
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_HAPTIC)) {
            SDL_HapticQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_HAPTIC);
    }
#endif
 
#if !SDL_AUDIO_DISABLED
    if ((flags & SDL_INIT_AUDIO)) {
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_AUDIO)) {
            SDL_AudioQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_AUDIO);
    }
#endif
 
#if !SDL_VIDEO_DISABLED
    if ((flags & SDL_INIT_VIDEO)) {
        /* video implies events */
        flags |= SDL_INIT_EVENTS;
 
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_VIDEO)) {
            SDL_VideoQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_VIDEO);
    }
#endif
 
#if !SDL_TIMERS_DISABLED
    if ((flags & SDL_INIT_TIMER)) {
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_TIMER)) {
            SDL_TimerQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_TIMER);
    }
#endif
 
#if !SDL_EVENTS_DISABLED
    if ((flags & SDL_INIT_EVENTS)) {
        if (SDL_PrivateShouldQuitSubsystem(SDL_INIT_EVENTS)) {
            SDL_EventsQuit();
        }
        SDL_PrivateSubsystemRefCountDecr(SDL_INIT_EVENTS);
    }
#endif
}

References SDL_AudioQuit, SDL_EventsQuit(), SDL_GameControllerQuit(), SDL_HapticQuit(), SDL_INIT_AUDIO, SDL_INIT_EVENTS, SDL_INIT_GAMECONTROLLER, SDL_INIT_HAPTIC, SDL_INIT_JOYSTICK, SDL_INIT_SENSOR, SDL_INIT_TIMER, SDL_INIT_VIDEO, SDL_JoystickQuit(), SDL_OS2Quit(), SDL_PrivateShouldQuitSubsystem(), SDL_PrivateSubsystemRefCountDecr(), SDL_SensorQuit(), SDL_TimerQuit(), and SDL_VideoQuit.

Referenced by SDL_Quit().

SDL_WasInit()

Uint32 SDL_WasInit

(

Uint32

flags

)

This function returns a mask of the specified subsystems which have previously been initialized.

If flags is 0, it returns a mask of all initialized subsystems.

Definition at line 396 of file SDL.c.

{
    int i;
    int num_subsystems = SDL_arraysize(SDL_SubsystemRefCount);
    Uint32 initialized = 0;
 
    /* Fast path for checking one flag */
    if (SDL_HasExactlyOneBitSet32(flags)) {
        int subsystem_index = SDL_MostSignificantBitIndex32(flags);
        return SDL_SubsystemRefCount[subsystem_index] ? flags : 0;
    }
 
    if (!flags) {
        flags = SDL_INIT_EVERYTHING;
    }
 
    num_subsystems = SDL_min(num_subsystems, SDL_MostSignificantBitIndex32(flags) + 1);
 
    /* Iterate over each bit in flags, and check the matching subsystem. */
    for (i = 0; i < num_subsystems; ++i) {
        if ((flags & 1) && SDL_SubsystemRefCount[i] > 0) {
            initialized |= (1 << i);
        }
 
        flags >>= 1;
    }
 
    return initialized;
}

References i, SDL_arraysize, SDL_HasExactlyOneBitSet32(), SDL_INIT_EVERYTHING, SDL_min, SDL_MostSignificantBitIndex32(), and SDL_SubsystemRefCount.