/* Given an io_object_t from OSX adds a joystick device to our list if appropriate
*/
int
AddDeviceHelper( io_object_t ioHIDDeviceObject )
{
recDevice *device;
/* build a device record */
device = HIDBuildDevice(ioHIDDeviceObject);
if (!device)
return 0;
/* Filter device list to non-keyboard/mouse stuff */
if ((device->usagePage != kHIDPage_GenericDesktop) ||
((device->usage != kHIDUsage_GD_Joystick &&
device->usage != kHIDUsage_GD_GamePad &&
device->usage != kHIDUsage_GD_MultiAxisController))) {
/* release memory for the device */
HIDDisposeDevice(&device);
DisposePtr((Ptr) device);
return 0;
}
/* Allocate an instance ID for this device */
device->instance_id = ++s_joystick_instance_id;
/* We have to do some storage of the io_service_t for
* SDL_HapticOpenFromJoystick */
if (FFIsForceFeedback(ioHIDDeviceObject) == FF_OK) {
device->ffservice = ioHIDDeviceObject;
} else {
device->ffservice = 0;
}
device->send_open_event = 1;
s_bDeviceAdded = SDL_TRUE;
/* Add device to the end of the list */
if ( !gpDeviceList )
{
gpDeviceList = device;
}
else
{
recDevice *curdevice;
curdevice = gpDeviceList;
while ( curdevice->pNext )
{
curdevice = curdevice->pNext;
}
curdevice->pNext = device;
}
return 1;
}
/* Function to scan the system for joysticks.
* Joystick 0 should be the system default joystick.
* This function should return the number of available joysticks, or -1
* on an unrecoverable fatal error.
*/
int SDL_SYS_JoystickInit(void)
{
IOReturn result = kIOReturnSuccess;
mach_port_t masterPort = NULL;
io_iterator_t hidObjectIterator = NULL;
CFMutableDictionaryRef hidMatchDictionary = NULL;
recDevice *device, *lastDevice;
io_object_t ioHIDDeviceObject = NULL;
SDL_numjoysticks = 0;
if (NULL != gpDeviceList)
{
SDL_SetError("Joystick: Device list already inited.");
return -1;
}
result = IOMasterPort (bootstrap_port, &masterPort);
if (kIOReturnSuccess != result)
{
SDL_SetError("Joystick: IOMasterPort error with bootstrap_port.");
return -1;
}
/* Set up a matching dictionary to search I/O Registry by class name for all HID class devices. */
hidMatchDictionary = IOServiceMatching (kIOHIDDeviceKey);
if ((hidMatchDictionary != NULL))
{
/* Add key for device type (joystick, in this case) to refine the matching dictionary. */
/* NOTE: we now perform this filtering later
UInt32 usagePage = kHIDPage_GenericDesktop;
UInt32 usage = kHIDUsage_GD_Joystick;
CFNumberRef refUsage = NULL, refUsagePage = NULL;
refUsage = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &usage);
CFDictionarySetValue (hidMatchDictionary, CFSTR (kIOHIDPrimaryUsageKey), refUsage);
refUsagePage = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &usagePage);
CFDictionarySetValue (hidMatchDictionary, CFSTR (kIOHIDPrimaryUsagePageKey), refUsagePage);
*/
}
else
{
SDL_SetError("Joystick: Failed to get HID CFMutableDictionaryRef via IOServiceMatching.");
return -1;
}
/*/ Now search I/O Registry for matching devices. */
result = IOServiceGetMatchingServices (masterPort, hidMatchDictionary, &hidObjectIterator);
/* Check for errors */
if (kIOReturnSuccess != result)
{
SDL_SetError("Joystick: Couldn't create a HID object iterator.");
return -1;
}
if (NULL == hidObjectIterator) /* there are no joysticks */
{
gpDeviceList = NULL;
SDL_numjoysticks = 0;
return 0;
}
/* IOServiceGetMatchingServices consumes a reference to the dictionary, so we don't need to release the dictionary ref. */
/* build flat linked list of devices from device iterator */
gpDeviceList = lastDevice = NULL;
while ((ioHIDDeviceObject = IOIteratorNext (hidObjectIterator)))
{
/* build a device record */
device = HIDBuildDevice (ioHIDDeviceObject);
if (!device)
continue;
/* dump device object, it is no longer needed */
result = IOObjectRelease (ioHIDDeviceObject);
// if (KERN_SUCCESS != result)
// HIDReportErrorNum ("IOObjectRelease error with ioHIDDeviceObject.", result);
/* Filter device list to non-keyboard/mouse stuff */
if ( (device->usagePage != kHIDPage_GenericDesktop) ||
((device->usage != kHIDUsage_GD_Joystick &&
device->usage != kHIDUsage_GD_GamePad)) ) {
/* release memory for the device */
HIDDisposeDevice (&device);
DisposePtr((Ptr)device);
continue;
}
/* Add device to the end of the list */
if (lastDevice)
lastDevice->pNext = device;
else
gpDeviceList = device;
lastDevice = device;
}
result = IOObjectRelease (hidObjectIterator); /* release the iterator */
/* Count the total number of devices we found */
device = gpDeviceList;
while (device)
{
SDL_numjoysticks++;
device = device->pNext;
}
return SDL_numjoysticks;
}
