/*

SDL - Simple DirectMedia Layer

Copyright (C) 2008 Edgar Simo

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

slouken@libsdl.org

*/

#include "SDL_config.h"

#ifdef SDL_HAPTIC_DINPUT

#include "SDL_haptic.h"

#include "../SDL_syshaptic.h"

#include "SDL_joystick.h"

#include "../../joystick/SDL_sysjoystick.h" /* For the real SDL_Joystick */

/*#include "../../joystick/win32/SDL_sysjoystick_c.h"*/ /* For joystick hwdata */

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#include <dinput.h>

#include <dxerr9.h> /* From DirectX SDK 9c */

#ifdef _MSC_VER

# pragma comment (lib, "dxerr9.lib")

#endif /* _MSC_VER */

/* an ISO hack for VisualC++ */

#ifdef _MSC_VER

#define snprintf _snprintf

#endif /* _MSC_VER */

#define MAX_HAPTICS 32

/*

* List of available haptic devices.

*/

static struct

{

DIDEVICEINSTANCE instance;

SDL_Haptic *haptic;

} SDL_hapticlist[MAX_HAPTICS];

/*

* Haptic system hardware data.

*/

struct haptic_hwdata

{

LPDIRECTINPUTDEVICE2 device;

DIDEVCAPS capabilities;

};

/*

* Haptic system effect data.

*/

struct haptic_hweffect

{

DIEFFECT effect;

};

/*

* Internal stuff.

*/

static LPDIRECTINPUT dinput = NULL;

/*

* External stuff.

*/

extern HINSTANCE SDL_Instance;

extern HWND SDL_Window;

/*

* Prototypes.

*/

static BOOL CALLBACK EnumHapticsCallback(const DIDEVICEINSTANCE * pdidInstance, VOID * pContext);

/*

* Like SDL_SetError but for DX error codes.

*/

static void

DI_SetError(const char *str, HRESULT err)

{

SDL_SetError( "Haptic: %s - %s: %s", str,

DXGetErrorString9(err),

DXGetErrorDescription9(err));

}

/*

* Initializes the haptic subsystem.

*/

int

SDL_SYS_HapticInit(void)

{

HRESULT ret;

if (dinput != NULL) { /* Already open. */

SDL_SetError("Haptic: SubSystem already open.");

return -1;

}

/* Clear all the memory. */

SDL_memset(SDL_hapticlist, 0, sizeof(SDL_hapticlist));

SDL_numhaptics = 0;

ret = CoInitialize(NULL);

if (FAILED(ret)) {

DI_SetError("Coinitialize",ret);

return -1;

}

ret = CoCreateInstance(&CLSID_DirectInput, NULL, CLSCTX_INPROC_SERVER,

&IID_IDirectInput, &dinput);

if (FAILED(ret)) {

DI_SetError("CoCreateInstance",ret);

return -1;

}

/* Because we used CoCreateInstance, we need to Initialize it, first. */

ret = IDirectInput_Initialize(dinput, SDL_Instance, DIRECTINPUT_VERSION);

if (FAILED(ret)) {

DI_SetError("Initializing DirectInput device",ret);

return -1;

}

/* Look for haptic devices. */

ret = IDirectInput_EnumDevices( dinput,

DIDEVTYPE_DEVICE,

EnumHapticsCallback,

NULL, DIEDFL_FORCEFEEDBACK | DIEDFL_ATTACHEDONLY);

if (FAILED(ret)) {

DI_SetError("Enumerating DirectInput devices",ret);

return -1;

}

return SDL_numhaptics;

}

/*

* Callback to find the haptic devices.

*/

static BOOL CALLBACK

EnumHapticsCallback(const DIDEVICEINSTANCE * pdidInstance, VOID * pContext)

{

memcpy(&SDL_hapticlist[SDL_numhaptics].instance, pdidInstance,

sizeof(DIDEVICEINSTANCE));

SDL_numhaptics++;

if (SDL_numhaptics >= MAX_HAPTICS)

return DIENUM_STOP;

return DIENUM_CONTINUE;

}

/*

* Return the name of a haptic device, does not need to be opened.

*/

const char *

SDL_SYS_HapticName(int index)

{

return SDL_hapticlist[index].instance.tszProductName;

}

/*

* Callback to get all supported effects.

*/

#define EFFECT_TEST(e,s) \

haptic->supported |= (s)

static BOOL CALLBACK

{

/* Prepare the haptic device. */

SDL_Haptic *haptic = (SDL_Haptic*) pv;

haptic->supported = 0;

/* Get supported. */

EFFECT_TEST(GUID_Spring, SDL_HAPTIC_SPRING);

EFFECT_TEST(GUID_Damper, SDL_HAPTIC_DAMPER);

EFFECT_TEST(GUID_Inertia, SDL_HAPTIC_INERTIA);

EFFECT_TEST(GUID_Friction, SDL_HAPTIC_FRICTION);

EFFECT_TEST(GUID_ConstantForce, SDL_HAPTIC_CONSTANT);

EFFECT_TEST(GUID_CustomForce, SDL_HAPTIC_CUSTOM);

EFFECT_TEST(GUID_Sine, SDL_HAPTIC_SINE);

EFFECT_TEST(GUID_Square, SDL_HAPTIC_SQUARE);

EFFECT_TEST(GUID_Triangle, SDL_HAPTIC_TRIANGLE);

EFFECT_TEST(GUID_SawtoothUp, SDL_HAPTIC_SAWTOOTHUP);

EFFECT_TEST(GUID_SawtoothDown, SDL_HAPTIC_SAWTOOTHDOWN);

EFFECT_TEST(GUID_RampForce, SDL_HAPTIC_RAMP);

/* Check for more. */

return DIENUM_CONTINUE;

}

/*

* Opens the haptic device from the file descriptor.

*

* Steps:

* - Open temporary DirectInputDevice interface.

* - Create DirectInputDevice2 interface.

* - Release DirectInputDevice interface.

* - Acquire exclusiveness.

* - Reset actuators.

* - Get supported featuers.

*/

static int

SDL_SYS_HapticOpenFromInstance(SDL_Haptic * haptic, DIDEVICEINSTANCE instance)

{

HRESULT ret;

LPDIRECTINPUTDEVICE device;

DIPROPDWORD dipdw;

/* Allocate the hwdata */

haptic->hwdata = (struct haptic_hwdata *)

SDL_malloc(sizeof(*haptic->hwdata));

if (haptic->hwdata == NULL) {

SDL_OutOfMemory();

goto creat_err;

}

SDL_memset(haptic->hwdata, 0, sizeof(*haptic->hwdata));

/* Open the device */

ret = IDirectInput_CreateDevice( dinput, &instance.guidInstance,

&device, NULL );

if (FAILED(ret)) {

DI_SetError("Creating DirectInput device",ret);

goto creat_err;

}

/* Now get the IDirectInputDevice2 interface, instead. */

ret = IDirectInputDevice_QueryInterface( device,

&IID_IDirectInputDevice2,

/* Done with the temporary one now. */

IDirectInputDevice_Release(device);

if (FAILED(ret)) {

DI_SetError("Querying DirectInput interface",ret);

goto creat_err;

}

/* Acquire the device. */

ret = IDirectInputDevice2_Acquire(haptic->hwdata->device);

if (FAILED(ret)) {

DI_SetError("Acquiring DirectInput device",ret);

goto query_err;

}

/* Grab it exclusively to use force feedback stuff. */

ret =IDirectInputDevice2_SetCooperativeLevel( haptic->hwdata->device,

SDL_Window,

DISCL_EXCLUSIVE | DISCL_BACKGROUND );

if (FAILED(ret)) {

DI_SetError("Setting cooperative level to exclusive",ret);

goto acquire_err;

}

/* Reset all actuators - just in case. */

ret = IDirectInputDevice2_SendForceFeedbackCommand( haptic->hwdata->device,

DISFFC_RESET );

if (FAILED(ret)) {

DI_SetError("Resetting device",ret);

goto acquire_err;

}

/* Enabling actuators. */

ret = IDirectInputDevice2_SendForceFeedbackCommand( haptic->hwdata->device,

DISFFC_SETACTUATORSON );

if (FAILED(ret)) {

DI_SetError("Enabling actuators",ret);

goto acquire_err;

}

/* Get capabilities. */

ret = IDirectInputDevice2_GetCapabilities( haptic->hwdata->device,

if (FAILED(ret)) {

DI_SetError("Getting device capabilities",ret);

goto acquire_err;

}

/* Get supported effects. */

ret = IDirectInputDevice2_EnumEffects( haptic->hwdata->device,

DI_EffectCallback, haptic, DIEFT_ALL );

if (FAILED(ret)) {

DI_SetError("Enumerating supported effects",ret);

goto acquire_err;

}

if (haptic->supported == 0) { /* Error since device supports nothing. */

SDL_SetError("Haptic: Internal error on finding supported effects.");

goto acquire_err;

}

/* Check autogain and autocenter. */

dipdw.diph.dwSize = sizeof(DIPROPDWORD);

dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);

dipdw.diph.dwObj = 0;

dipdw.diph.dwHow = DIPH_DEVICE;

dipdw.dwData = 10000;

ret = IDirectInputDevice2_SetProperty( haptic->hwdata->device,

DIPROP_FFGAIN, &dipdw.diph );

if (FAILED(ret)) {

if (ret != DIERR_UNSUPPORTED) {

DI_SetError("Checking gain",ret);

goto acquire_err;

}

}

else { /* Gain is supported. */

haptic->supported |= SDL_HAPTIC_GAIN;

}

dipdw.dwData = DIPROPAUTOCENTER_OFF;

ret = IDirectInputDevice2_SetProperty( haptic->hwdata->device,

DIPROP_AUTOCENTER, &dipdw.diph );

if (FAILED(ret)) {

if (ret != DIERR_UNSUPPORTED) {

DI_SetError("Checking autocenter",ret);

goto acquire_err;

}

}

else { /* Autocenter is supported. */

haptic->supported |= SDL_HAPTIC_AUTOCENTER;

}

/* Check maximum effects. */

haptic->neffects = 128; /* TODO actually figure this out. */

haptic->nplaying = 128;

/* Prepare effects memory. */

haptic->effects = (struct haptic_effect *)

SDL_malloc(sizeof(struct haptic_effect) * haptic->neffects);

if (haptic->effects == NULL) {

SDL_OutOfMemory();

goto acquire_err;

}

/* Clear the memory */

SDL_memset(haptic->effects, 0,

sizeof(struct haptic_effect) * haptic->neffects);

return 0;

/* Error handling */

acquire_err:

IDirectInputDevice2_Unacquire(haptic->hwdata->device);

query_err:

IDirectInputDevice2_Release(haptic->hwdata->device);

creat_err:

if (haptic->hwdata != NULL) {

free(haptic->hwdata);

haptic->hwdata = NULL;

}

return -1;

}

/*

* Opens a haptic device for usage.

*/

int

SDL_SYS_HapticOpen(SDL_Haptic * haptic)

{

return SDL_SYS_HapticOpenFromInstance( haptic,

SDL_hapticlist[haptic->index].instance );

}

/*

* Opens a haptic device from first mouse it finds for usage.

*/

int

SDL_SYS_HapticMouse(void)

{

return -1;

}

/*

* Checks to see if a joystick has haptic features.

*/

int

SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick)

{

return SDL_FALSE;

}

/*

* Checks to see if the haptic device and joystick and in reality the same.

*/

int

SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic, SDL_Joystick * joystick)

{

return 0;

}

/*

* Opens a SDL_Haptic from a SDL_Joystick.

*/

int

SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic, SDL_Joystick * joystick)

{

return -1;

}

/*

* Closes the haptic device.

*/

void

SDL_SYS_HapticClose(SDL_Haptic * haptic)

{

if (haptic->hwdata) {

haptic->neffects = 0;

/* Clean up */

IDirectInputDevice2_Unacquire(haptic->hwdata->device);

IDirectInputDevice2_Release(haptic->hwdata->device);

/* Free */

SDL_free(haptic->hwdata);

haptic->hwdata = NULL;

}

}

/*

* Clean up after system specific haptic stuff

*/

void

SDL_SYS_HapticQuit(void)

{

IDirectInput_Release(dinput);

dinput = NULL;

}

/*

* Converts an SDL trigger button to an DIEFFECT trigger button.

*/

static DWORD

DIGetTriggerButton( Uint16 button )

{

DWORD dwTriggerButton;

dwTriggerButton = DIEB_NOTRIGGER;

if (button != 0) {

dwTriggerButton = DIJOFS_BUTTON(button - 1);

}

return dwTriggerButton;

}

/*

* Sets the direction.

*/

static int

{

LONG *rglDir;

/* Handle no axes a part. */

if (naxes == 0) {

effect->rglDirection = NULL;

return 0;

}

/* Has axes. */

rglDir = SDL_malloc( sizeof(LONG) * naxes );

if (rglDir == NULL) {

SDL_OutOfMemory();

return -1;

}

SDL_memset( rglDir, 0, sizeof(LONG) * naxes );

effect->rglDirection = rglDir;

switch (dir->type) {

case SDL_HAPTIC_POLAR:

rglDir[0] = dir->dir[0];

return 0;

case SDL_HAPTIC_CARTESIAN:

rglDir[0] = dir->dir[0];

rglDir[1] = dir->dir[1];

rglDir[2] = dir->dir[2];

return 0;

case SDL_HAPTIC_SPHERICAL:

rglDir[0] = dir->dir[0];

rglDir[1] = dir->dir[1];

rglDir[2] = dir->dir[2];

return 0;

default:

SDL_SetError("Haptic: Unknown direction type.");

return -1;

}

}

#define CONVERT(x) (((x)*10000) / 0xFFFF )

/*

*/

static int

{

int i;

DICONSTANTFORCE *constant;

DIPERIODIC *periodic;

DICONDITION *condition; /* Actually an array of conditions - one per axis. */

DIRAMPFORCE *ramp;

DICUSTOMFORCE *custom;

DIENVELOPE *envelope;

SDL_HapticConstant *hap_constant;

SDL_HapticPeriodic *hap_periodic;

SDL_HapticCondition *hap_condition;

SDL_HapticRamp *hap_ramp;

SDL_HapticCustom *hap_custom;

DWORD *axes;

/* Set global stuff. */

SDL_memset(dest, 0, sizeof(DIEFFECT));

dest->dwSize = sizeof(DIEFFECT); /* Set the structure size. */

dest->dwSamplePeriod = 0; /* Not used by us. */

dest->dwGain = 10000; /* Gain is set globally, not locally. */

/* Envelope. */

if (envelope == NULL) {

SDL_OutOfMemory();

return -1;

}

/* Axes. */

dest->cAxes = haptic->naxes;

if (dest->cAxes > 0) {

axes = SDL_malloc(sizeof(DWORD) * dest->cAxes);

if (axes == NULL) {

SDL_OutOfMemory();

return -1;

}

}

if (dest->cAxes > 2) {

}

dest->rgdwAxes = axes;

}

/* The big type handling switch, even bigger then linux's version. */

switch (src->type) {

case SDL_HAPTIC_CONSTANT:

hap_constant = &src->constant;

if (constant == NULL) {

SDL_OutOfMemory();

return -1;

}

/* Specifics */

constant->lMagnitude = CONVERT(hap_constant->level);

dest->lpvTypeSpecificParams = constant;

/* Generics */

dest->dwDuration = hap_constant->length * 1000; /* In microseconds. */

dest->dwTriggerRepeatInterval = hap_constant->interval;

dest->dwStartDelay = hap_constant->delay * 1000; /* In microseconds. */

/* Direction. */

if (SDL_SYS_SetDirection(dest, &hap_constant->direction, dest->cAxes) < 0) {

return -1;

}

/* Envelope */

if ((hap_constant->attack_length==0) && (hap_constant->fade_length==0)) {

SDL_free(dest->lpEnvelope);

dest->lpEnvelope = NULL;

}

else {

envelope->dwAttackLevel = CONVERT(hap_constant->attack_level);

envelope->dwAttackTime = hap_constant->attack_length * 1000;

envelope->dwFadeLevel = CONVERT(hap_constant->fade_level);

envelope->dwFadeTime = hap_constant->fade_length * 1000;

}

break;

case SDL_HAPTIC_SINE:

case SDL_HAPTIC_SQUARE:

case SDL_HAPTIC_TRIANGLE:

case SDL_HAPTIC_SAWTOOTHUP:

case SDL_HAPTIC_SAWTOOTHDOWN:

hap_periodic = &src->periodic;

if (periodic == NULL) {

SDL_OutOfMemory();

return -1;

}

/* Specifics */

periodic->dwMagnitude = CONVERT(hap_periodic->magnitude);

periodic->lOffset = CONVERT(hap_periodic->offset);

periodic->dwPhase = hap_periodic->phase;

periodic->dwPeriod = hap_periodic->period * 1000;

dest->lpvTypeSpecificParams = periodic;

/* Generics */

dest->dwDuration = hap_periodic->length * 1000; /* In microseconds. */

dest->dwTriggerRepeatInterval = hap_periodic->interval;

dest->dwStartDelay = hap_periodic->delay * 1000; /* In microseconds. */

/* Direction. */

if (SDL_SYS_SetDirection(dest, &hap_periodic->direction, dest->cAxes) < 0) {

return -1;

}

/* Envelope */

if ((hap_periodic->attack_length==0) && (hap_periodic->fade_length==0)) {

SDL_free(dest->lpEnvelope);

dest->lpEnvelope = NULL;

}

else {

envelope->dwAttackLevel = CONVERT(hap_periodic->attack_level);

envelope->dwAttackTime = hap_periodic->attack_length * 1000;

envelope->dwFadeLevel = CONVERT(hap_periodic->fade_level);

envelope->dwFadeTime = hap_periodic->fade_length * 1000;

}

break;

case SDL_HAPTIC_SPRING:

case SDL_HAPTIC_DAMPER:

case SDL_HAPTIC_INERTIA:

case SDL_HAPTIC_FRICTION:

hap_condition = &src->condition;

if (condition == NULL) {

SDL_OutOfMemory();

return -1;

}

/* Specifics */

condition[i].lOffset = CONVERT(hap_condition->center[i]);

condition[i].lPositiveCoefficient = CONVERT(hap_condition->right_coeff[i]);

condition[i].lNegativeCoefficient = CONVERT(hap_condition->left_coeff[i]);

condition[i].dwPositiveSaturation = CONVERT(hap_condition->right_sat[i]);

condition[i].dwNegativeSaturation = CONVERT(hap_condition->left_sat[i]);

condition[i].lDeadBand = CONVERT(hap_condition->deadband[i]);

}

dest->lpvTypeSpecificParams = condition;

/* Generics */

dest->dwDuration = hap_condition->length * 1000; /* In microseconds. */

dest->dwTriggerRepeatInterval = hap_condition->interval;

dest->dwStartDelay = hap_condition->delay * 1000; /* In microseconds. */

/* Direction. */

if (SDL_SYS_SetDirection(dest, &hap_condition->direction, dest->cAxes) < 0) {

return -1;

}

/* Envelope */

/* TODO Check is envelope actually used.

envelope->dwAttackLevel = CONVERT(hap_condition->attack_level);

envelope->dwAttackTime = hap_condition->attack_length * 1000;

envelope->dwFadeLevel = CONVERT(hap_condition->fade_level);

envelope->dwFadeTime = hap_condition->fade_length * 1000;

*/

break;

case SDL_HAPTIC_RAMP:

hap_ramp = &src->ramp;

if (ramp == NULL) {

SDL_OutOfMemory();

return -1;

}

/* Specifics */

ramp->lStart = CONVERT(hap_ramp->start);

ramp->lEnd = CONVERT(hap_ramp->end);

dest->lpvTypeSpecificParams = ramp;

/* Generics */

dest->dwDuration = hap_ramp->length * 1000; /* In microseconds. */

dest->dwTriggerRepeatInterval = hap_ramp->interval;

dest->dwStartDelay = hap_ramp->delay * 1000; /* In microseconds. */

/* Direction. */

if (SDL_SYS_SetDirection(dest, &hap_ramp->direction, dest->cAxes) < 0) {

return -1;

}

/* Envelope */

if ((hap_ramp->attack_length==0) && (hap_ramp->fade_length==0)) {

SDL_free(dest->lpEnvelope);

dest->lpEnvelope = NULL;

}

else {

envelope->dwAttackLevel = CONVERT(hap_ramp->attack_level);

envelope->dwAttackTime = hap_ramp->attack_length * 1000;

envelope->dwFadeLevel = CONVERT(hap_ramp->fade_level);

envelope->dwFadeTime = hap_ramp->fade_length * 1000;

}

break;

case SDL_HAPTIC_CUSTOM:

hap_custom = &src->custom;

if (custom == NULL) {

SDL_OutOfMemory();

return -1;

}

/* Specifics */

custom->cChannels = hap_custom->channels;

custom->dwSamplePeriod = hap_custom->period * 1000;

custom->cSamples = hap_custom->samples;

custom->rglForceData = SDL_malloc(sizeof(LONG)*custom->cSamples*custom->cChannels);

for (i=0; i<hap_custom->samples*hap_custom->channels; i++) { /* Copy data. */

custom->rglForceData[i] = CONVERT(hap_custom->data[i]);

}

dest->lpvTypeSpecificParams = custom;

/* Generics */

dest->dwDuration = hap_custom->length * 1000; /* In microseconds. */

dest->dwTriggerRepeatInterval = hap_custom->interval;

dest->dwStartDelay = hap_custom->delay * 1000; /* In microseconds. */

/* Direction. */

if (SDL_SYS_SetDirection(dest, &hap_custom->direction, dest->cAxes) < 0) {

return -1;

}

/* Envelope */

if ((hap_custom->attack_length==0) && (hap_custom->fade_length==0)) {

SDL_free(dest->lpEnvelope);

dest->lpEnvelope = NULL;

}

else {

envelope->dwAttackLevel = CONVERT(hap_custom->attack_level);

envelope->dwAttackTime = hap_custom->attack_length * 1000;

envelope->dwFadeLevel = CONVERT(hap_custom->fade_level);

envelope->dwFadeTime = hap_custom->fade_length * 1000;

}

break;

default:

SDL_SetError("Haptic: Unknown effect type.");

return -1;

}

return 0;

}

/*

*/

static void

if (effect->lpEnvelope != NULL) {

SDL_free(effect->lpEnvelope);

effect->lpEnvelope = NULL;

}

if (effect->rgdwAxes != NULL) {

SDL_free(effect->rgdwAxes);

effect->rgdwAxes = NULL;

}

if (effect->lpvTypeSpecificParams != NULL) {

if (type == SDL_HAPTIC_CUSTOM) { /* Must free the custom data. */

SDL_free(custom->rglForceData);

custom->rglForceData = NULL;

}

SDL_free(effect->lpvTypeSpecificParams);

effect->lpvTypeSpecificParams = NULL;

}

if (effect->rglDirection != NULL) {

SDL_free(effect->rglDirection);

effect->rglDirection = NULL;

}

}

/*

* Gets the effect type from the generic SDL haptic effect wrapper.

*/

REFGUID

SDL_SYS_HapticEffectType(struct haptic_effect * effect)

{

switch (effect->effect.type) {

case SDL_HAPTIC_CONSTANT:

case SDL_HAPTIC_RAMP:

case SDL_HAPTIC_SQUARE:

case SDL_HAPTIC_SINE:

case SDL_HAPTIC_TRIANGLE:

case SDL_HAPTIC_SAWTOOTHUP:

case SDL_HAPTIC_SAWTOOTHDOWN:

case SDL_HAPTIC_SPRING:

case SDL_HAPTIC_DAMPER:

case SDL_HAPTIC_INERTIA:

case SDL_HAPTIC_FRICTION:

case SDL_HAPTIC_CUSTOM:

default:

SDL_SetError("Haptic: Unknown effect type.");

return NULL;

}

}

/*

* Creates a new haptic effect.

*/

int

SDL_SYS_HapticNewEffect(SDL_Haptic * haptic, struct haptic_effect * effect,

SDL_HapticEffect * base)

{

HRESULT ret;

/* Get the type. */

REFGUID type = SDL_SYS_HapticEffectType(effect);

if (type == NULL) {

goto err_hweffect;

}

/* Alloc the effect. */

effect->hweffect = (struct haptic_hweffect *)

SDL_malloc(sizeof(struct haptic_hweffect));

if (effect->hweffect == NULL) {

SDL_OutOfMemory();

goto err_hweffect;

}

/* Get the effect. */

goto err_effectdone;

}

/* Create the actual effect. */

ret = IDirectInputDevice2_CreateEffect(haptic->hwdata->device, type,

&effect->hweffect->effect, &effect->hweffect->ref, NULL);

if (FAILED(ret)) {

DI_SetError("Unable to create effect",ret);

goto err_effectdone;

}

return 0;

err_effectdone:

err_hweffect:

if (effect->hweffect != NULL) {

SDL_free(effect->hweffect);

effect->hweffect = NULL;

}

return -1;

}

/*

* Updates an effect.

*/

int

SDL_SYS_HapticUpdateEffect(SDL_Haptic * haptic,

struct haptic_effect * effect, SDL_HapticEffect * data)

{

HRESULT ret;

DWORD flags;

DIEFFECT temp;

/* Get the effect. */

SDL_memset(&temp, 0, sizeof(DIEFFECT));

if (SDL_SYS_ToDIEFFECT(haptic, &temp, data) < 0) {

goto err_update;

}

/* Set the flags. Might be worthwhile to diff temp with loaded effect and

* only change those parameters. */

flags = DIEP_DIRECTION |

DIEP_DURATION |

DIEP_ENVELOPE |

DIEP_STARTDELAY |

DIEP_TRIGGERBUTTON |

DIEP_TRIGGERREPEATINTERVAL |

DIEP_TYPESPECIFICPARAMS;

/* Create the actual effect. */

if (FAILED(ret)) {

DI_SetError("Unable to update effect",ret);

goto err_update;

}

/* Copy it over. */

SDL_SYS_HapticFreeDIEFFECT(&effect->hweffect->effect, data->type);

SDL_memcpy(&effect->hweffect->effect, &temp, sizeof(DIEFFECT));

return 0;

err_update:

return -1;

}

/*

* Runs an effect.

*/