/* Function to update the state of a joystick - called as a device poll.
* This function shouldn't update the joystick structure directly,
* but instead should call SDL_PrivateJoystick*() to deliver events
* and update joystick device state.
*/
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
{
recDevice *device = joystick->hwdata;
recElement *element;
SInt32 value;
int i;
if (device->removed) /* device was unplugged; ignore it. */
{
if (device->uncentered)
{
device->uncentered = 0;
/* Tell the app that everything is centered/unpressed... */
for (i = 0; i < device->axes; i++)
SDL_PrivateJoystickAxis(joystick, i, 0);
for (i = 0; i < device->buttons; i++)
SDL_PrivateJoystickButton(joystick, i, 0);
for (i = 0; i < device->hats; i++)
SDL_PrivateJoystickHat(joystick, i, SDL_HAT_CENTERED);
}
return;
}
element = device->firstAxis;
i = 0;
while (element)
{
value = HIDScaledCalibratedValue(device, element, -32768, 32767);
if ( value != joystick->axes[i] )
SDL_PrivateJoystickAxis(joystick, i, value);
element = element->pNext;
++i;
}
element = device->firstButton;
i = 0;
while (element)
{
value = HIDGetElementValue(device, element);
if (value > 1) /* handle pressure-sensitive buttons */
value = 1;
if ( value != joystick->buttons[i] )
SDL_PrivateJoystickButton(joystick, i, value);
element = element->pNext;
++i;
}
element = device->firstHat;
i = 0;
while (element)
{
Uint8 pos = 0;
value = HIDGetElementValue(device, element);
if (element->max == 3) /* 4 position hatswitch - scale up value */
value *= 2;
else if (element->max != 7) /* Neither a 4 nor 8 positions - fall back to default position (centered) */
value = -1;
switch(value)
{
case 0:
pos = SDL_HAT_UP;
break;
case 1:
pos = SDL_HAT_RIGHTUP;
break;
case 2:
pos = SDL_HAT_RIGHT;
break;
case 3:
pos = SDL_HAT_RIGHTDOWN;
break;
case 4:
pos = SDL_HAT_DOWN;
break;
case 5:
pos = SDL_HAT_LEFTDOWN;
break;
case 6:
pos = SDL_HAT_LEFT;
break;
case 7:
pos = SDL_HAT_LEFTUP;
break;
default:
/* Every other value is mapped to center. We do that because some
* joysticks use 8 and some 15 for this value, and apparently
* there are even more variants out there - so we try to be generous.
*/
pos = SDL_HAT_CENTERED;
break;
}
if ( pos != joystick->hats[i] )
SDL_PrivateJoystickHat(joystick, i, pos);
element = element->pNext;
++i;
}
return;
}
/* Function to update the state of a joystick - called as a device poll.
* This function shouldn't update the joystick structure directly,
* but instead should call SDL_PrivateJoystick*() to deliver events
* and update joystick device state.
*/
void
SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
{
recDevice *device = joystick->hwdata;
recElement *element;
SInt32 value, range;
int i;
if ( !device )
return;
if (device->removed) { /* device was unplugged; ignore it. */
recDevice *devicelist = gpDeviceList;
joystick->closed = 1;
joystick->uncentered = 1;
if ( devicelist == device )
{
gpDeviceList = device->pNext;
}
else
{
while ( devicelist->pNext != device )
{
devicelist = devicelist->pNext;
}
devicelist->pNext = device->pNext;
}
DisposePtr((Ptr) device);
joystick->hwdata = NULL;
#if !SDL_EVENTS_DISABLED
SDL_Event event;
event.type = SDL_JOYDEVICEREMOVED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = joystick->instance_id;
if ((SDL_EventOK == NULL)
|| (*SDL_EventOK) (SDL_EventOKParam, &event)) {
SDL_PushEvent(&event);
}
}
#endif /* !SDL_EVENTS_DISABLED */
return;
}
element = device->firstAxis;
i = 0;
while (element) {
value = HIDScaledCalibratedValue(device, element, -32768, 32767);
if (value != joystick->axes[i])
SDL_PrivateJoystickAxis(joystick, i, value);
element = element->pNext;
++i;
}
element = device->firstButton;
i = 0;
while (element) {
value = HIDGetElementValue(device, element);
if (value > 1) /* handle pressure-sensitive buttons */
value = 1;
if (value != joystick->buttons[i])
SDL_PrivateJoystickButton(joystick, i, value);
element = element->pNext;
++i;
}
element = device->firstHat;
i = 0;
while (element) {
Uint8 pos = 0;
range = (element->max - element->min + 1);
value = HIDGetElementValue(device, element) - element->min;
if (range == 4) /* 4 position hatswitch - scale up value */
value *= 2;
else if (range != 8) /* Neither a 4 nor 8 positions - fall back to default position (centered) */
value = -1;
switch (value) {
case 0:
pos = SDL_HAT_UP;
break;
case 1:
pos = SDL_HAT_RIGHTUP;
break;
case 2:
pos = SDL_HAT_RIGHT;
break;
case 3:
pos = SDL_HAT_RIGHTDOWN;
break;
case 4:
pos = SDL_HAT_DOWN;
break;
case 5:
pos = SDL_HAT_LEFTDOWN;
break;
case 6:
pos = SDL_HAT_LEFT;
break;
case 7:
pos = SDL_HAT_LEFTUP;
break;
default:
/* Every other value is mapped to center. We do that because some
* joysticks use 8 and some 15 for this value, and apparently
* there are even more variants out there - so we try to be generous.
*/
pos = SDL_HAT_CENTERED;
break;
}
if (pos != joystick->hats[i])
SDL_PrivateJoystickHat(joystick, i, pos);
element = element->pNext;
++i;
}
return;
}