SDL_sysjoystick.m File Reference

#include "../../SDL_internal.h"
#include "SDL_sysjoystick_c.h"
#include "SDL_config_iphoneos.h"
#include "SDL_assert.h"
#include "SDL_events.h"
#include "SDL_joystick.h"
#include "SDL_hints.h"
#include "SDL_stdinc.h"
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
#include "../../events/SDL_events_c.h"
#import <CoreMotion/CoreMotion.h>

Include dependency graph for SDL_sysjoystick.m:

Go to the source code of this file.

Functions
static SDL_JoystickDeviceItem *	GetDeviceForIndex (int device_index)
static void	IOS_AddMFIJoystickDevice (SDL_JoystickDeviceItem *device, GCController *controller)
static void	IOS_AddJoystickDevice (GCController *controller, SDL_bool accelerometer)
static SDL_JoystickDeviceItem *	IOS_RemoveJoystickDevice (SDL_JoystickDeviceItem *device)
static int	IOS_JoystickInit (void)
static int	IOS_JoystickGetCount (void)
static void	IOS_JoystickDetect (void)
static const char *	IOS_JoystickGetDeviceName (int device_index)
static int	IOS_JoystickGetDevicePlayerIndex (int device_index)
static SDL_JoystickGUID	IOS_JoystickGetDeviceGUID (int device_index)
static SDL_JoystickID	IOS_JoystickGetDeviceInstanceID (int device_index)
static int	IOS_JoystickOpen (SDL_Joystick *joystick, int device_index)
static void	IOS_AccelerometerUpdate (SDL_Joystick *joystick)
static void	IOS_MFIJoystickUpdate (SDL_Joystick *joystick)
static int	IOS_JoystickRumble (SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms)
static void	IOS_JoystickUpdate (SDL_Joystick *joystick)
static void	IOS_JoystickClose (SDL_Joystick *joystick)
static void	IOS_JoystickQuit (void)

Variables
static const char *	accelerometerName = "iOS Accelerometer"
static CMMotionManager *	motionManager = nil
static SDL_JoystickDeviceItem *	deviceList = NULL
static int	numjoysticks = 0
int	SDL_AppleTVRemoteOpenedAsJoystick = 0
SDL_JoystickDriver	SDL_IOS_JoystickDriver

Function Documentation

static SDL_JoystickDeviceItem* GetDeviceForIndex ( int  device_index )

static

Definition at line 64 of file SDL_sysjoystick.m.

References device, deviceList, i, recDevice::next, and NULL.

Referenced by IOS_JoystickGetDeviceGUID(), IOS_JoystickGetDeviceInstanceID(), IOS_JoystickGetDeviceName(), and IOS_JoystickOpen().

{
    SDL_JoystickDeviceItem *device = deviceList;
    int i = 0;

    while (i < device_index) {
        if (device == NULL) {
            return NULL;
        }
        device = device->next;
        i++;
    }

    return device;
}

static void IOS_AccelerometerUpdate ( SDL_Joystick *  joystick )

static

Definition at line 435 of file SDL_sysjoystick.m.

References motionManager, SDL_IPHONE_MAX_GFORCE, SDL_max, SDL_min, and SDL_PrivateJoystickAxis().

Referenced by IOS_JoystickUpdate().

{
#if !TARGET_OS_TV
    const float maxgforce = SDL_IPHONE_MAX_GFORCE;
    const SInt16 maxsint16 = 0x7FFF;
    CMAcceleration accel;

    @autoreleasepool {
        if (!motionManager.isAccelerometerActive) {
            return;
        }

        accel = motionManager.accelerometerData.acceleration;
    }

    /*
     Convert accelerometer data from floating point to Sint16, which is what
     the joystick system expects.

     To do the conversion, the data is first clamped onto the interval
     [-SDL_IPHONE_MAX_G_FORCE, SDL_IPHONE_MAX_G_FORCE], then the data is multiplied
     by MAX_SINT16 so that it is mapped to the full range of an Sint16.

     You can customize the clamped range of this function by modifying the
     SDL_IPHONE_MAX_GFORCE macro in SDL_config_iphoneos.h.

     Once converted to Sint16, the accelerometer data no longer has coherent
     units. You can convert the data back to units of g-force by multiplying
     it in your application's code by SDL_IPHONE_MAX_GFORCE / 0x7FFF.
     */

    /* clamp the data */
    accel.x = SDL_min(SDL_max(accel.x, -maxgforce), maxgforce);
    accel.y = SDL_min(SDL_max(accel.y, -maxgforce), maxgforce);
    accel.z = SDL_min(SDL_max(accel.z, -maxgforce), maxgforce);

    /* pass in data mapped to range of SInt16 */
    SDL_PrivateJoystickAxis(joystick, 0,  (accel.x / maxgforce) * maxsint16);
    SDL_PrivateJoystickAxis(joystick, 1, -(accel.y / maxgforce) * maxsint16);
    SDL_PrivateJoystickAxis(joystick, 2,  (accel.z / maxgforce) * maxsint16);
#endif /* !TARGET_OS_TV */
}

static void IOS_AddJoystickDevice ( GCController *  controller, SDL_bool  accelerometer  )

static

Definition at line 157 of file SDL_sysjoystick.m.

References recDevice::accelerometer, accelerometerName, recDevice::controller, SDL_JoystickGUID::data, device, deviceList, recDevice::guid, recDevice::instance_id, IOS_AddMFIJoystickDevice(), recDevice::name, recDevice::naxes, recDevice::nbuttons, recDevice::next, recDevice::nhats, NULL, numjoysticks, SDL_calloc, SDL_free, SDL_GetHintBoolean, SDL_GetNextJoystickInstanceID(), SDL_HINT_TV_REMOTE_AS_JOYSTICK, SDL_memcpy, SDL_min, SDL_PrivateJoystickAdded(), SDL_strdup, SDL_strlen, and SDL_TRUE.

Referenced by IOS_JoystickInit().

{
    SDL_JoystickDeviceItem *device = deviceList;

#if TARGET_OS_TV
    if (!SDL_GetHintBoolean(SDL_HINT_TV_REMOTE_AS_JOYSTICK, SDL_TRUE)) {
        /* Ignore devices that aren't actually controllers (e.g. remotes), they'll be handled as keyboard input */
        if (controller && !controller.extendedGamepad && !controller.gamepad && controller.microGamepad) {
            return;
        }
    }
#endif

    while (device != NULL) {
        if (device->controller == controller) {
            return;
        }
        device = device->next;
    }

    device = (SDL_JoystickDeviceItem *) SDL_calloc(1, sizeof(SDL_JoystickDeviceItem));
    if (device == NULL) {
        return;
    }

    device->accelerometer = accelerometer;
    device->instance_id = SDL_GetNextJoystickInstanceID();

    if (accelerometer) {
#if TARGET_OS_TV
        SDL_free(device);
        return;
#else
        device->name = SDL_strdup(accelerometerName);
        device->naxes = 3; /* Device acceleration in the x, y, and z axes. */
        device->nhats = 0;
        device->nbuttons = 0;

        /* Use the accelerometer name as a GUID. */
        SDL_memcpy(&device->guid.data, device->name, SDL_min(sizeof(SDL_JoystickGUID), SDL_strlen(device->name)));
#endif /* TARGET_OS_TV */
    } else if (controller) {
        IOS_AddMFIJoystickDevice(device, controller);
    }

    if (deviceList == NULL) {
        deviceList = device;
    } else {
        SDL_JoystickDeviceItem *lastdevice = deviceList;
        while (lastdevice->next != NULL) {
            lastdevice = lastdevice->next;
        }
        lastdevice->next = device;
    }

    ++numjoysticks;

    SDL_PrivateJoystickAdded(device->instance_id);
}

static void IOS_AddMFIJoystickDevice ( SDL_JoystickDeviceItem *  device, GCController *  controller  )

static

Definition at line 81 of file SDL_sysjoystick.m.

References recDevice::controller, SDL_JoystickGUID::data, recDevice::guid, recDevice::name, recDevice::naxes, recDevice::nbuttons, recDevice::nhats, NULL, SDL_FALSE, SDL_GetHintBoolean, SDL_HARDWARE_BUS_BLUETOOTH, SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION, SDL_strdup, and SDL_SwapLE16.

Referenced by IOS_AddJoystickDevice().

{
#ifdef SDL_JOYSTICK_MFI
    const Uint16 VENDOR_APPLE = 0x05AC;
    Uint16 *guid16 = (Uint16 *)device->guid.data;
    Uint16 vendor = 0;
    Uint16 product = 0;
    Uint16 version = 0;
    Uint8 subtype = 0;

    const char *name = NULL;
    /* Explicitly retain the controller because SDL_JoystickDeviceItem is a
     * struct, and ARC doesn't work with structs. */
    device->controller = (__bridge GCController *) CFBridgingRetain(controller);

    if (controller.vendorName) {
        name = controller.vendorName.UTF8String;
    }

    if (!name) {
        name = "MFi Gamepad";
    }

    device->name = SDL_strdup(name);

    if (controller.extendedGamepad) {
        vendor = VENDOR_APPLE;
        product = 1;
        subtype = 1;
        device->naxes = 6; /* 2 thumbsticks and 2 triggers */
        device->nhats = 1; /* d-pad */
        device->nbuttons = 7; /* ABXY, shoulder buttons, pause button */
    } else if (controller.gamepad) {
        vendor = VENDOR_APPLE;
        product = 2;
        subtype = 2;
        device->naxes = 0; /* no traditional analog inputs */
        device->nhats = 1; /* d-pad */
        device->nbuttons = 7; /* ABXY, shoulder buttons, pause button */
    }
#if TARGET_OS_TV
    else if (controller.microGamepad) {
        vendor = VENDOR_APPLE;
        product = 3;
        subtype = 3;
        device->naxes = 2; /* treat the touch surface as two axes */
        device->nhats = 0; /* apparently the touch surface-as-dpad is buggy */
        device->nbuttons = 3; /* AX, pause button */

        controller.microGamepad.allowsRotation = SDL_GetHintBoolean(SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION, SDL_FALSE);
    }
#endif /* TARGET_OS_TV */

    /* We only need 16 bits for each of these; space them out to fill 128. */
    /* Byteswap so devices get same GUID on little/big endian platforms. */
    *guid16++ = SDL_SwapLE16(SDL_HARDWARE_BUS_BLUETOOTH);
    *guid16++ = 0;
    *guid16++ = SDL_SwapLE16(vendor);
    *guid16++ = 0;
    *guid16++ = SDL_SwapLE16(product);
    *guid16++ = 0;
    *guid16++ = SDL_SwapLE16(version);
    *guid16++ = 0;

    /* Note that this is an MFI controller and what subtype it is */
    device->guid.data[14] = 'm';
    device->guid.data[15] = subtype;

    /* This will be set when the first button press of the controller is
     * detected. */
    controller.playerIndex = -1;

#endif /* SDL_JOYSTICK_MFI */
}

static void IOS_JoystickClose ( SDL_Joystick *  joystick )

static

Definition at line 655 of file SDL_sysjoystick.m.

References recDevice::accelerometer, recDevice::controller, device, recDevice::joystick, NULL, recDevice::remote, and SDL_AppleTVRemoteOpenedAsJoystick.

{
    SDL_JoystickDeviceItem *device = joystick->hwdata;

    if (device == NULL) {
        return;
    }

    device->joystick = NULL;

    @autoreleasepool {
        if (device->accelerometer) {
#if !TARGET_OS_TV
            [motionManager stopAccelerometerUpdates];
#endif /* !TARGET_OS_TV */
        } else if (device->controller) {
#ifdef SDL_JOYSTICK_MFI
            GCController *controller = device->controller;
            controller.controllerPausedHandler = nil;
            controller.playerIndex = -1;
#endif
        }
    }
    if (device->remote) {
        --SDL_AppleTVRemoteOpenedAsJoystick;
    }
}

static void IOS_JoystickDetect ( void  )

static

Definition at line 350 of file SDL_sysjoystick.m.

{
}

static int IOS_JoystickGetCount ( void  )

static

Definition at line 344 of file SDL_sysjoystick.m.

References numjoysticks.

{
    return numjoysticks;
}

static SDL_JoystickGUID IOS_JoystickGetDeviceGUID ( int  device_index )

static

Definition at line 368 of file SDL_sysjoystick.m.

References device, GetDeviceForIndex(), recDevice::guid, and SDL_zero.

{
    SDL_JoystickDeviceItem *device = GetDeviceForIndex(device_index);
    SDL_JoystickGUID guid;
    if (device) {
        guid = device->guid;
    } else {
        SDL_zero(guid);
    }
    return guid;
}

static SDL_JoystickID IOS_JoystickGetDeviceInstanceID ( int  device_index )

static

Definition at line 381 of file SDL_sysjoystick.m.

References device, GetDeviceForIndex(), and recDevice::instance_id.

{
    SDL_JoystickDeviceItem *device = GetDeviceForIndex(device_index);
    return device ? device->instance_id : -1;
}

static const char* IOS_JoystickGetDeviceName ( int  device_index )

static

Definition at line 355 of file SDL_sysjoystick.m.

References device, GetDeviceForIndex(), and recDevice::name.

{
    SDL_JoystickDeviceItem *device = GetDeviceForIndex(device_index);
    return device ? device->name : "Unknown";
}

static int IOS_JoystickGetDevicePlayerIndex ( int  device_index )

static

Definition at line 362 of file SDL_sysjoystick.m.

{
    return -1;
}

static int IOS_JoystickInit ( void  )

static

Definition at line 288 of file SDL_sysjoystick.m.

References sort_controllers::controllers, IOS_AddJoystickDevice(), NULL, SDL_AddHintCallback, SDL_FALSE, SDL_GetHintBoolean, SDL_HINT_ACCELEROMETER_AS_JOYSTICK, SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION, and SDL_TRUE.

{
    @autoreleasepool {
        NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

#if !TARGET_OS_TV
        if (SDL_GetHintBoolean(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, SDL_TRUE)) {
            /* Default behavior, accelerometer as joystick */
            IOS_AddJoystickDevice(nil, SDL_TRUE);
        }
#endif /* !TARGET_OS_TV */

#ifdef SDL_JOYSTICK_MFI
        /* GameController.framework was added in iOS 7. */
        if (![GCController class]) {
            return 0;
        }

        for (GCController *controller in [GCController controllers]) {
            IOS_AddJoystickDevice(controller, SDL_FALSE);
        }

#if TARGET_OS_TV
        SDL_AddHintCallback(SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION,
                            SDL_AppleTVRemoteRotationHintChanged, NULL);
#endif /* TARGET_OS_TV */

        connectObserver = [center addObserverForName:GCControllerDidConnectNotification
                                              object:nil
                                               queue:nil
                                          usingBlock:^(NSNotification *note) {
                                              GCController *controller = note.object;
                                              IOS_AddJoystickDevice(controller, SDL_FALSE);
                                          }];

        disconnectObserver = [center addObserverForName:GCControllerDidDisconnectNotification
                                                 object:nil
                                                  queue:nil
                                             usingBlock:^(NSNotification *note) {
                                                 GCController *controller = note.object;
                                                 SDL_JoystickDeviceItem *device = deviceList;
                                                 while (device != NULL) {
                                                     if (device->controller == controller) {
                                                         IOS_RemoveJoystickDevice(device);
                                                         break;
                                                     }
                                                     device = device->next;
                                                 }
                                             }];
#endif /* SDL_JOYSTICK_MFI */
    }

    return 0;
}

static int IOS_JoystickOpen ( SDL_Joystick *  joystick, int  device_index  )

static

Definition at line 388 of file SDL_sysjoystick.m.

References recDevice::accelerometer, recDevice::controller, device, GetDeviceForIndex(), recDevice::instance_id, recDevice::joystick, motionManager, recDevice::naxes, recDevice::nbuttons, recDevice::nhats, NULL, recDevice::remote, SDL_AppleTVRemoteOpenedAsJoystick, and SDL_SetError.

{
    SDL_JoystickDeviceItem *device = GetDeviceForIndex(device_index);
    if (device == NULL) {
        return SDL_SetError("Could not open Joystick: no hardware device for the specified index");
    }

    joystick->hwdata = device;
    joystick->instance_id = device->instance_id;

    joystick->naxes = device->naxes;
    joystick->nhats = device->nhats;
    joystick->nbuttons = device->nbuttons;
    joystick->nballs = 0;

    device->joystick = joystick;

    @autoreleasepool {
        if (device->accelerometer) {
#if !TARGET_OS_TV
            if (motionManager == nil) {
                motionManager = [[CMMotionManager alloc] init];
            }

            /* Shorter times between updates can significantly increase CPU usage. */
            motionManager.accelerometerUpdateInterval = 0.1;
            [motionManager startAccelerometerUpdates];
#endif /* !TARGET_OS_TV */
        } else {
#ifdef SDL_JOYSTICK_MFI
            GCController *controller = device->controller;
            controller.controllerPausedHandler = ^(GCController *c) {
                if (joystick->hwdata) {
                    ++joystick->hwdata->num_pause_presses;
                }
            };
#endif /* SDL_JOYSTICK_MFI */
        }
    }
    if (device->remote) {
        ++SDL_AppleTVRemoteOpenedAsJoystick;
    }

    return 0;
}

static void IOS_JoystickQuit ( void  )

static

Definition at line 684 of file SDL_sysjoystick.m.

References IOS_RemoveJoystickDevice(), motionManager, NULL, numjoysticks, SDL_DelHintCallback, and SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION.

{
    @autoreleasepool {
#ifdef SDL_JOYSTICK_MFI
        NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

        if (connectObserver) {
            [center removeObserver:connectObserver name:GCControllerDidConnectNotification object:nil];
            connectObserver = nil;
        }

        if (disconnectObserver) {
            [center removeObserver:disconnectObserver name:GCControllerDidDisconnectNotification object:nil];
            disconnectObserver = nil;
        }

#if TARGET_OS_TV
        SDL_DelHintCallback(SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION,
                            SDL_AppleTVRemoteRotationHintChanged, NULL);
#endif /* TARGET_OS_TV */
#endif /* SDL_JOYSTICK_MFI */

        while (deviceList != NULL) {
            IOS_RemoveJoystickDevice(deviceList);
        }

#if !TARGET_OS_TV
        motionManager = nil;
#endif /* !TARGET_OS_TV */
    }

    numjoysticks = 0;
}

static int IOS_JoystickRumble ( SDL_Joystick *  joystick, Uint16  low_frequency_rumble, Uint16  high_frequency_rumble, Uint32  duration_ms  )

static

Definition at line 633 of file SDL_sysjoystick.m.

References SDL_Unsupported.

{
    return SDL_Unsupported();
}

static void IOS_JoystickUpdate ( SDL_Joystick *  joystick )

static

Definition at line 639 of file SDL_sysjoystick.m.

References recDevice::accelerometer, recDevice::controller, device, IOS_AccelerometerUpdate(), IOS_MFIJoystickUpdate(), and NULL.

{
    SDL_JoystickDeviceItem *device = joystick->hwdata;

    if (device == NULL) {
        return;
    }
    
    if (device->accelerometer) {
        IOS_AccelerometerUpdate(joystick);
    } else if (device->controller) {
        IOS_MFIJoystickUpdate(joystick);
    }
}

static void IOS_MFIJoystickUpdate ( SDL_Joystick *  joystick )

static

Definition at line 505 of file SDL_sysjoystick.m.

References sort_controllers::controllers, i, SDL_arraysize, SDL_HAT_CENTERED, SDL_PRESSED, SDL_PrivateJoystickAxis(), SDL_PrivateJoystickButton(), SDL_PrivateJoystickHat(), and SDL_RELEASED.

Referenced by IOS_JoystickUpdate().

{
#if SDL_JOYSTICK_MFI
    @autoreleasepool {
        GCController *controller = joystick->hwdata->controller;
        Uint8 hatstate = SDL_HAT_CENTERED;
        int i;
        int updateplayerindex = 0;

        if (controller.extendedGamepad) {
            GCExtendedGamepad *gamepad = controller.extendedGamepad;

            /* Axis order matches the XInput Windows mappings. */
            Sint16 axes[] = {
                (Sint16) (gamepad.leftThumbstick.xAxis.value * 32767),
                (Sint16) (gamepad.leftThumbstick.yAxis.value * -32767),
                (Sint16) ((gamepad.leftTrigger.value * 65535) - 32768),
                (Sint16) (gamepad.rightThumbstick.xAxis.value * 32767),
                (Sint16) (gamepad.rightThumbstick.yAxis.value * -32767),
                (Sint16) ((gamepad.rightTrigger.value * 65535) - 32768),
            };

            /* Button order matches the XInput Windows mappings. */
            Uint8 buttons[] = {
                gamepad.buttonA.isPressed, gamepad.buttonB.isPressed,
                gamepad.buttonX.isPressed, gamepad.buttonY.isPressed,
                gamepad.leftShoulder.isPressed,
                gamepad.rightShoulder.isPressed,
            };

            hatstate = IOS_MFIJoystickHatStateForDPad(gamepad.dpad);

            for (i = 0; i < SDL_arraysize(axes); i++) {
                /* The triggers (axes 2 and 5) are resting at -32768 but SDL
                 * initializes its values to 0. We only want to make sure the
                 * player index is up to date if the user actually moves an axis. */
                if ((i != 2 && i != 5) || axes[i] != -32768) {
                    updateplayerindex |= (joystick->axes[i].value != axes[i]);
                }
                SDL_PrivateJoystickAxis(joystick, i, axes[i]);
            }

            for (i = 0; i < SDL_arraysize(buttons); i++) {
                updateplayerindex |= (joystick->buttons[i] != buttons[i]);
                SDL_PrivateJoystickButton(joystick, i, buttons[i]);
            }
        } else if (controller.gamepad) {
            GCGamepad *gamepad = controller.gamepad;

            /* Button order matches the XInput Windows mappings. */
            Uint8 buttons[] = {
                gamepad.buttonA.isPressed, gamepad.buttonB.isPressed,
                gamepad.buttonX.isPressed, gamepad.buttonY.isPressed,
                gamepad.leftShoulder.isPressed,
                gamepad.rightShoulder.isPressed,
            };

            hatstate = IOS_MFIJoystickHatStateForDPad(gamepad.dpad);

            for (i = 0; i < SDL_arraysize(buttons); i++) {
                updateplayerindex |= (joystick->buttons[i] != buttons[i]);
                SDL_PrivateJoystickButton(joystick, i, buttons[i]);
            }
        }
#if TARGET_OS_TV
        else if (controller.microGamepad) {
            GCMicroGamepad *gamepad = controller.microGamepad;

            Sint16 axes[] = {
                (Sint16) (gamepad.dpad.xAxis.value * 32767),
                (Sint16) (gamepad.dpad.yAxis.value * -32767),
            };

            for (i = 0; i < SDL_arraysize(axes); i++) {
                updateplayerindex |= (joystick->axes[i].value != axes[i]);
                SDL_PrivateJoystickAxis(joystick, i, axes[i]);
            }

            Uint8 buttons[] = {
                gamepad.buttonA.isPressed,
                gamepad.buttonX.isPressed,
            };

            for (i = 0; i < SDL_arraysize(buttons); i++) {
                updateplayerindex |= (joystick->buttons[i] != buttons[i]);
                SDL_PrivateJoystickButton(joystick, i, buttons[i]);
            }
        }
#endif /* TARGET_OS_TV */

        if (joystick->nhats > 0) {
            updateplayerindex |= (joystick->hats[0] != hatstate);
            SDL_PrivateJoystickHat(joystick, 0, hatstate);
        }

        for (i = 0; i < joystick->hwdata->num_pause_presses; i++) {
            const Uint8 pausebutton = joystick->nbuttons - 1; /* The pause button is always last. */
            SDL_PrivateJoystickButton(joystick, pausebutton, SDL_PRESSED);
            SDL_PrivateJoystickButton(joystick, pausebutton, SDL_RELEASED);
            updateplayerindex = YES;
        }
        joystick->hwdata->num_pause_presses = 0;

        if (updateplayerindex && controller.playerIndex == -1) {
            BOOL usedPlayerIndexSlots[4] = {NO, NO, NO, NO};

            /* Find the player index of all other connected controllers. */
            for (GCController *c in [GCController controllers]) {
                if (c != controller && c.playerIndex >= 0) {
                    usedPlayerIndexSlots[c.playerIndex] = YES;
                }
            }

            /* Set this controller's player index to the first unused index.
             * FIXME: This logic isn't great... but SDL doesn't expose this
             * concept in its external API, so we don't have much to go on. */
            for (i = 0; i < SDL_arraysize(usedPlayerIndexSlots); i++) {
                if (!usedPlayerIndexSlots[i]) {
                    controller.playerIndex = i;
                    break;
                }
            }
        }
    }
#endif /* SDL_JOYSTICK_MFI */
}

static SDL_JoystickDeviceItem* IOS_RemoveJoystickDevice ( SDL_JoystickDeviceItem *  device )

static

Definition at line 218 of file SDL_sysjoystick.m.

References recDevice::controller, deviceList, recDevice::instance_id, recDevice::joystick, recDevice::name, recDevice::next, NULL, numjoysticks, SDL_free, and SDL_PrivateJoystickRemoved().

Referenced by IOS_JoystickQuit().

{
    SDL_JoystickDeviceItem *prev = NULL;
    SDL_JoystickDeviceItem *next = NULL;
    SDL_JoystickDeviceItem *item = deviceList;

    if (device == NULL) {
        return NULL;
    }

    next = device->next;

    while (item != NULL) {
        if (item == device) {
            break;
        }
        prev = item;
        item = item->next;
    }

    /* Unlink the device item from the device list. */
    if (prev) {
        prev->next = device->next;
    } else if (device == deviceList) {
        deviceList = device->next;
    }

    if (device->joystick) {
        device->joystick->hwdata = NULL;
    }

#ifdef SDL_JOYSTICK_MFI
    @autoreleasepool {
        if (device->controller) {
            /* The controller was explicitly retained in the struct, so it
             * should be explicitly released before freeing the struct. */
            GCController *controller = CFBridgingRelease((__bridge CFTypeRef)(device->controller));
            controller.controllerPausedHandler = nil;
            device->controller = nil;
        }
    }
#endif /* SDL_JOYSTICK_MFI */

    --numjoysticks;

    SDL_PrivateJoystickRemoved(device->instance_id);

    SDL_free(device->name);
    SDL_free(device);

    return next;
}

Variable Documentation

const char* accelerometerName = "iOS Accelerometer"

static

Definition at line 54 of file SDL_sysjoystick.m.

Referenced by IOS_AddJoystickDevice().

SDL_JoystickDeviceItem* deviceList = NULL

static

Definition at line 58 of file SDL_sysjoystick.m.

Referenced by GetDeviceForIndex(), IOS_AddJoystickDevice(), and IOS_RemoveJoystickDevice().

CMMotionManager* motionManager = nil

static

Definition at line 55 of file SDL_sysjoystick.m.

Referenced by IOS_AccelerometerUpdate(), IOS_JoystickOpen(), and IOS_JoystickQuit().

int numjoysticks = 0

static

Definition at line 60 of file SDL_sysjoystick.m.

Referenced by IOS_AddJoystickDevice(), IOS_JoystickGetCount(), IOS_JoystickQuit(), and IOS_RemoveJoystickDevice().

int SDL_AppleTVRemoteOpenedAsJoystick = 0

Definition at line 61 of file SDL_sysjoystick.m.

Referenced by IOS_JoystickClose(), and IOS_JoystickOpen().

SDL_JoystickDriver SDL_IOS_JoystickDriver

Initial value:

{
    IOS_JoystickInit,
    IOS_JoystickGetCount,
    IOS_JoystickDetect,
    IOS_JoystickGetDeviceName,
    IOS_JoystickGetDevicePlayerIndex,
    IOS_JoystickGetDeviceGUID,
    IOS_JoystickGetDeviceInstanceID,
    IOS_JoystickOpen,
    IOS_JoystickRumble,
    IOS_JoystickUpdate,
    IOS_JoystickClose,
    IOS_JoystickQuit,
}

Definition at line 718 of file SDL_sysjoystick.m.