/*

Simple DirectMedia Layer

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

#include "../../SDL_internal.h"

/* This is the iOS implementation of the SDL joystick API */

#include "SDL_sysjoystick_c.h"

/* needed for SDL_IPHONE_MAX_GFORCE macro */

#include "SDL_config_iphoneos.h"

#include "SDL_joystick.h"

#include "SDL_hints.h"

#include "SDL_stdinc.h"

#include "../SDL_sysjoystick.h"

#include "../SDL_joystick_c.h"

#if !SDL_EVENTS_DISABLED

#include "../../events/SDL_events_c.h"

#endif

#if !TARGET_OS_TV

#ifdef SDL_JOYSTICK_MFI

#import <GameController/GameController.h>

static id connectObserver = nil;

static id disconnectObserver = nil;

#endif /* SDL_JOYSTICK_MFI */

static SDL_JoystickDeviceItem *deviceList = NULL;

static SDL_JoystickDeviceItem *

GetDeviceForIndex(int device_index)

{

SDL_JoystickDeviceItem *device = deviceList;

int i = 0;

while (i < device_index) {

if (device == NULL) {

return NULL;

}

device = device->next;

i++;

}

return device;

}

static void

{

#ifdef SDL_JOYSTICK_MFI

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 */

}

#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(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

{

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;

}

if (device == NULL) {

return;

}

device->accelerometer = accelerometer;

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)));

}

if (deviceList == NULL) {

deviceList = device;

} else {

SDL_JoystickDeviceItem *lastdevice = deviceList;

while (lastdevice->next != NULL) {

lastdevice = lastdevice->next;

}

lastdevice->next = device;

}

++numjoysticks;

}

{

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_free(device->name);

SDL_free(device);

return next;

}

SDL_AppleTVRemoteRotationHintChanged(void *udata, const char *name, const char *oldValue, const char *newValue)

{

BOOL allowRotation = newValue != NULL && *newValue != '0';

@autoreleasepool {

for (GCController *controller in [GCController controllers]) {

if (controller.microGamepad) {

controller.microGamepad.allowsRotation = allowRotation;

}

}

}

}

#endif /* TARGET_OS_TV */

static int

IOS_JoystickInit(void)

@autoreleasepool {

NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

#ifdef SDL_JOYSTICK_MFI

/* GameController.framework was added in iOS 7. */

if (![GCController class]) {

}

for (GCController *controller in [GCController controllers]) {

}

#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;

}];

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) {

break;

}

device = device->next;

}

}];

#endif /* SDL_JOYSTICK_MFI */

}

}

static int

IOS_JoystickGetCount(void)

{

return numjoysticks;

}

static void

IOS_JoystickDetect(void)

{

}

static const char *

IOS_JoystickGetDeviceName(int device_index)

SDL_JoystickDeviceItem *device = GetDeviceForIndex(device_index);

return device ? device->name : "Unknown";

}

static int

IOS_JoystickGetDevicePlayerIndex(int device_index)

{

return -1;

}

static SDL_JoystickGUID

IOS_JoystickGetDeviceGUID( int device_index )

{

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 int

IOS_JoystickOpen(SDL_Joystick * joystick, int device_index)

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;

device->joystick = joystick;

@autoreleasepool {

if (motionManager == nil) {

motionManager = [[CMMotionManager alloc] init];

}

/* Shorter times between updates can significantly increase CPU usage. */

motionManager.accelerometerUpdateInterval = 0.1;

[motionManager startAccelerometerUpdates];

} else {

#ifdef SDL_JOYSTICK_MFI

GCController *controller = device->controller;

if (joystick->hwdata) {

++joystick->hwdata->num_pause_presses;

}

};

#endif /* SDL_JOYSTICK_MFI */

}

}

if (device->remote) {

++SDL_AppleTVRemoteOpenedAsJoystick;

}

return 0;

}

const float maxgforce = SDL_IPHONE_MAX_GFORCE;

const SInt16 maxsint16 = 0x7FFF;

CMAcceleration accel;

@autoreleasepool {

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 */

}

#ifdef SDL_JOYSTICK_MFI

static Uint8

{

Uint8 hat = 0;

if (dpad.up.isPressed) {

hat |= SDL_HAT_UP;

} else if (dpad.down.isPressed) {

hat |= SDL_HAT_DOWN;

}

if (dpad.left.isPressed) {

hat |= SDL_HAT_LEFT;

} else if (dpad.right.isPressed) {

hat |= SDL_HAT_RIGHT;

}

if (hat == 0) {

return SDL_HAT_CENTERED;

}

return hat;

}

#endif

static void

@autoreleasepool {

GCController *controller = joystick->hwdata->controller;

Uint8 hatstate = SDL_HAT_CENTERED;

int i;

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,

};

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) {

}

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,

};

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++) {

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++) {

}

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;

}

}

}

}

static int

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

{

return SDL_Unsupported();

}

static void

IOS_JoystickUpdate(SDL_Joystick * joystick)

SDL_JoystickDeviceItem *device = joystick->hwdata;

if (device == NULL) {

return;

}

}

static void

IOS_JoystickClose(SDL_Joystick * joystick)

SDL_JoystickDeviceItem *device = joystick->hwdata;

if (device == NULL) {

return;

}

device->joystick = NULL;

} else if (device->controller) {

#ifdef SDL_JOYSTICK_MFI

GCController *controller = device->controller;

controller.controllerPausedHandler = nil;

#endif

}

if (device->remote) {

--SDL_AppleTVRemoteOpenedAsJoystick;

}

}

static void

IOS_JoystickQuit(void)

{

@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) {