JNIEXPORT jint JNICALL Java_at_wisch_joystick_FFJoystick_setGainNative (JNIEnv *env, jclass, jint hapticDeviceIndex, jint gainValue){
int num = SDL_HapticSetGain(ffjoysticks[hapticDeviceIndex], gainValue);
if (num < 0) {
throwException(env, SDL_GetError());
return -18;
}
return num;
}
/*
* Opens a Haptic device.
*/
SDL_Haptic *
SDL_HapticOpen(int device_index)
{
int i;
SDL_Haptic *haptic;
if ((device_index < 0) || (device_index >= SDL_numhaptics)) {
SDL_SetError("Haptic: There are %d haptic devices available",
SDL_numhaptics);
return NULL;
}
/* If the haptic is already open, return it */
for (i = 0; SDL_haptics[i]; i++) {
if (device_index == SDL_haptics[i]->index) {
haptic = SDL_haptics[i];
++haptic->ref_count;
return haptic;
}
}
/* Create the haptic device */
haptic = (SDL_Haptic *) SDL_malloc((sizeof *haptic));
if (haptic == NULL) {
SDL_OutOfMemory();
return NULL;
}
/* Initialize the haptic device */
SDL_memset(haptic, 0, (sizeof *haptic));
haptic->rumble_id = -1;
haptic->index = device_index;
if (SDL_SYS_HapticOpen(haptic) < 0) {
SDL_free(haptic);
return NULL;
}
/* Add haptic to list */
for (i = 0; SDL_haptics[i]; i++)
/* Skip to next haptic */ ;
if (i >= SDL_numhaptics) {
SDL_free(haptic);
SDL_SetError("Haptic: Trying to add device past the number originally detected");
return NULL;
}
SDL_haptics[i] = haptic;
++haptic->ref_count;
/* Disable autocenter and set gain to max. */
if (haptic->supported & SDL_HAPTIC_GAIN)
SDL_HapticSetGain(haptic, 100);
if (haptic->supported & SDL_HAPTIC_AUTOCENTER)
SDL_HapticSetAutocenter(haptic, 0);
return haptic;
}
/*
* Opens a Haptic device.
*/
SDL_Haptic *
SDL_HapticOpen(int device_index)
{
SDL_Haptic *haptic;
SDL_Haptic *hapticlist;
if ((device_index < 0) || (device_index >= SDL_NumHaptics())) {
SDL_SetError("Haptic: There are %d haptic devices available",
SDL_NumHaptics());
return NULL;
}
hapticlist = SDL_haptics;
/* If the haptic is already open, return it
* TODO: Should we create haptic instance IDs like the Joystick API?
*/
while ( hapticlist )
{
if (device_index == hapticlist->index) {
haptic = hapticlist;
++haptic->ref_count;
return haptic;
}
hapticlist = hapticlist->next;
}
/* Create the haptic device */
haptic = (SDL_Haptic *) SDL_malloc((sizeof *haptic));
if (haptic == NULL) {
SDL_OutOfMemory();
return NULL;
}
/* Initialize the haptic device */
SDL_memset(haptic, 0, (sizeof *haptic));
haptic->rumble_id = -1;
haptic->index = device_index;
if (SDL_SYS_HapticOpen(haptic) < 0) {
SDL_free(haptic);
return NULL;
}
/* Add haptic to list */
++haptic->ref_count;
/* Link the haptic in the list */
haptic->next = SDL_haptics;
SDL_haptics = haptic;
/* Disable autocenter and set gain to max. */
if (haptic->supported & SDL_HAPTIC_GAIN)
SDL_HapticSetGain(haptic, 100);
if (haptic->supported & SDL_HAPTIC_AUTOCENTER)
SDL_HapticSetAutocenter(haptic, 0);
return haptic;
}
bool SDL2FFBDevice::setGain(const int gain)
{
if (!m_adjustableGain) {
QMessageBox::warning(nullptr, SDL2DEV_ERR_CAPTION, "Device does not have adjustable gain");
return false;
}
if (gain < 0 || gain > 100) {
QMessageBox::warning(nullptr, SDL2DEV_ERR_CAPTION, "Gain must be within <0; 100>");
return false;
}
if (SDL_HapticSetGain(c_haptic, gain) < 0) {
QMessageBox::warning(nullptr, SDL2DEV_ERR_CAPTION, QString("Unable to set gain:\n%1").arg(SDL_GetError()));
return false;
}
return true;
}
