bool joypad::check_ff_features() {
FFCAPABILITIES features;
HRESULT ret = FFDeviceGetForceFeedbackCapabilities(ff_device, &features);
if (ret == FF_OK && (features.supportedEffects & FFCAP_ET_CONSTANTFORCE)) {
uint32_t val;
ret = FFDeviceGetForceFeedbackProperty(ff_device, FFPROP_FFGAIN, &val, sizeof(val));
if (ret != FF_OK) return false;
int num_axes = features.numFfAxes;
ff_axes = (DWORD *)memalloc(sizeof(DWORD) * num_axes);
ff_directions = (LONG *)memalloc(sizeof(LONG) * num_axes);
for (int i = 0; i < num_axes; i++) {
ff_axes[i] = features.ffAxes[i];
ff_directions[i] = 0;
}
ff_effect.cAxes = num_axes;
ff_effect.rgdwAxes = ff_axes;
ff_effect.rglDirection = ff_directions;
return true;
}
return false;
}
/*
* Gets supported features.
*/
static unsigned int
GetSupportedFeatures(SDL_Haptic * haptic)
{
HRESULT ret;
FFDeviceObjectReference device;
FFCAPABILITIES features;
unsigned int supported;
Uint32 val;
device = haptic->hwdata->device;
ret = FFDeviceGetForceFeedbackCapabilities(device, &features);
if (ret != FF_OK) {
return SDL_SetError("Haptic: Unable to get device's supported features.");
}
supported = 0;
/* Get maximum effects. */
haptic->neffects = features.storageCapacity;
haptic->nplaying = features.playbackCapacity;
/* Test for effects. */
FF_TEST(FFCAP_ET_CONSTANTFORCE, SDL_HAPTIC_CONSTANT);
FF_TEST(FFCAP_ET_RAMPFORCE, SDL_HAPTIC_RAMP);
/* !!! FIXME: put this back when we have more bits in 2.1 */
/* FF_TEST(FFCAP_ET_SQUARE, SDL_HAPTIC_SQUARE); */
FF_TEST(FFCAP_ET_SINE, SDL_HAPTIC_SINE);
FF_TEST(FFCAP_ET_TRIANGLE, SDL_HAPTIC_TRIANGLE);
FF_TEST(FFCAP_ET_SAWTOOTHUP, SDL_HAPTIC_SAWTOOTHUP);
FF_TEST(FFCAP_ET_SAWTOOTHDOWN, SDL_HAPTIC_SAWTOOTHDOWN);
FF_TEST(FFCAP_ET_SPRING, SDL_HAPTIC_SPRING);
FF_TEST(FFCAP_ET_DAMPER, SDL_HAPTIC_DAMPER);
FF_TEST(FFCAP_ET_INERTIA, SDL_HAPTIC_INERTIA);
FF_TEST(FFCAP_ET_FRICTION, SDL_HAPTIC_FRICTION);
FF_TEST(FFCAP_ET_CUSTOMFORCE, SDL_HAPTIC_CUSTOM);
/* Check if supports gain. */
ret = FFDeviceGetForceFeedbackProperty(device, FFPROP_FFGAIN,
&val, sizeof(val));
if (ret == FF_OK) {
supported |= SDL_HAPTIC_GAIN;
} else if (ret != FFERR_UNSUPPORTED) {
return SDL_SetError("Haptic: Unable to get if device supports gain: %s.",
FFStrError(ret));
}
/* Checks if supports autocenter. */
ret = FFDeviceGetForceFeedbackProperty(device, FFPROP_AUTOCENTER,
&val, sizeof(val));
if (ret == FF_OK) {
supported |= SDL_HAPTIC_AUTOCENTER;
} else if (ret != FFERR_UNSUPPORTED) {
return SDL_SetError
("Haptic: Unable to get if device supports autocenter: %s.",
FFStrError(ret));
}
/* Check for axes, we have an artificial limit on axes */
haptic->naxes = ((features.numFfAxes) > 3) ? 3 : features.numFfAxes;
/* Actually store the axes we want to use */
SDL_memcpy(haptic->hwdata->axes, features.ffAxes,
haptic->naxes * sizeof(Uint8));
/* Always supported features. */
supported |= SDL_HAPTIC_STATUS | SDL_HAPTIC_PAUSE;
haptic->supported = supported;
return 0;
}