void PollForJoystickInput(int cpad)
{
int joyid = conf->get_joyid(cpad);
if (!JoystickIdWithinBounds(joyid)) return;
SDL_JoystickUpdate();
for (int i = 0; i < MAX_KEYS; i++)
{
JoystickInfo* pjoy = s_vjoysticks[joyid];
switch (type_of_joykey(cpad, i))
{
case PAD_JOYBUTTONS:
{
int value = SDL_JoystickGetButton((pjoy)->GetJoy(), key_to_button(cpad, i));
if (value)
key_status->press(cpad, i);
else
key_status->release(cpad, i);
break;
}
case PAD_HAT:
{
int value = SDL_JoystickGetHat((pjoy)->GetJoy(), key_to_axis(cpad, i));
// key_to_hat_dir and SDL_JoystickGetHat are a 4 bits bitmap, one for each directions. Only 1 bit can be high for
// key_to_hat_dir. SDL_JoystickGetHat handles diagonal too (2 bits) so you must check the intersection
// '&' not only equality '=='. -- Gregory
if (key_to_hat_dir(cpad, i) & value)
key_status->press(cpad, i);
else
key_status->release(cpad, i);
break;
}
case PAD_AXIS:
{
int value = pjoy->GetAxisFromKey(cpad, i);
bool sign = key_to_axis_sign(cpad, i);
bool full_axis = key_to_axis_type(cpad, i);
if (IsAnalogKey(i)) {
if (abs(value) > pjoy->GetDeadzone())
key_status->press(cpad, i, value);
else
key_status->release(cpad, i);
} else {
if (full_axis) {
value += 0x8000;
if (value > pjoy->GetDeadzone())
key_status->press(cpad, i, min(value/256 , 0xFF));
else
key_status->release(cpad, i);
} else {
if (sign && (-value > pjoy->GetDeadzone()))
key_status->press(cpad, i, min(-value /128, 0xFF));
else if (!sign && (value > pjoy->GetDeadzone()))
key_status->press(cpad, i, min(value /128, 0xFF));
else
key_status->release(cpad, i);
}
}
}
default: break;
}
}
}
