pandory500/SDL-mirror
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Final merge of Google Summer of Code 2008 work...

Browse source 
Force Feedback for SDL
by Edgar Simo, mentored by Ryan C. Gordon

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403159
This commit is contained in:
Sam Lantinga 2008-08-25 09:55:03 +00:00
parent 0aca811202
commit 4fd9c25fe6
29 changed files with 6642 additions and 165 deletions
Download patch file Download diff file Expand all files Collapse all files

698
src/haptic/SDL_haptic.c Normal file
View file

@ -0,0 +1,698 @@
/*
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"
#include "SDL_syshaptic.h"
#include "../joystick/SDL_joystick_c.h" /* For SDL_PrivateJoystickValid */
Uint8 SDL_numhaptics = 0;
SDL_Haptic **SDL_haptics = NULL;
/*
* Initializes the Haptic devices.
*/
int
SDL_HapticInit(void)
{
int arraylen;
int status;
SDL_numhaptics = 0;
status = SDL_SYS_HapticInit();
if (status >= 0) {
arraylen = (status + 1) * sizeof(*SDL_haptics);
SDL_haptics = (SDL_Haptic **) SDL_malloc(arraylen);
if (SDL_haptics == NULL) { /* Out of memory. */
SDL_numhaptics = 0;
} else {
SDL_memset(SDL_haptics, 0, arraylen);
SDL_numhaptics = status;
}
status = 0;
}
return status;
}
/*
* Checks to see if the haptic device is valid
*/
static int
ValidHaptic(SDL_Haptic * haptic)
{
int i;
int valid;
valid = 0;
for (i = 0; i < SDL_numhaptics; i++) {
if (SDL_haptics[i] == haptic) {
valid = 1;
break;
}
}
return valid;
}
/*
* Returns the number of available devices.
*/
int
SDL_NumHaptics(void)
{
return SDL_numhaptics;
}
/*
* Gets the name of a Haptic device by index.
*/
const char *
SDL_HapticName(int device_index)
{
if ((device_index < 0) || (device_index >= SDL_numhaptics)) {
SDL_SetError("Haptic: There are %d haptic devices available",
SDL_numhaptics);
return NULL;
}
return SDL_SYS_HapticName(device_index);
}
/*
* 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->index = device_index;
if (SDL_SYS_HapticOpen(haptic) < 0) {
SDL_free(haptic);
return NULL;
}
/* 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);
/* Add haptic to list */
++haptic->ref_count;
for (i = 0; SDL_haptics[i]; i++)
/* Skip to next haptic */ ;
SDL_haptics[i] = haptic;
return haptic;
}
/*
* Returns 1 if the device has been opened.
*/
int
SDL_HapticOpened(int device_index)
{
int i, opened;
opened = 0;
for (i = 0; SDL_haptics[i]; i++) {
if (SDL_haptics[i]->index == (Uint8) device_index) {
opened = 1;
break;
}
}
return opened;
}
/*
* Returns the index to a haptic device.
*/
int
SDL_HapticIndex(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
return haptic->index;
}
/*
* Returns SDL_TRUE if mouse is haptic, SDL_FALSE if it isn't.
*/
int
SDL_MouseIsHaptic(void)
{
if (SDL_SYS_HapticMouse() < 0)
return SDL_FALSE;
return SDL_TRUE;
}
/*
* Returns the haptic device if mouse is haptic or NULL elsewise.
*/
SDL_Haptic *
SDL_HapticOpenFromMouse(void)
{
int device_index;
device_index = SDL_SYS_HapticMouse();
if (device_index < 0) {
SDL_SetError("Haptic: Mouse isn't a haptic device.");
return NULL;
}
return SDL_HapticOpen(device_index);
}
/*
* Returns SDL_TRUE if joystick has haptic features.
*/
int
SDL_JoystickIsHaptic(SDL_Joystick * joystick)
{
int ret;
/* Must be a valid joystick */
if (!SDL_PrivateJoystickValid(&joystick)) {
return -1;
}
ret = SDL_SYS_JoystickIsHaptic(joystick);
if (ret > 0)
return SDL_TRUE;
else if (ret == 0)
return SDL_FALSE;
else
return -1;
}
/*
* Opens a haptic device from a joystick.
*/
SDL_Haptic *
SDL_HapticOpenFromJoystick(SDL_Joystick * joystick)
{
int i;
SDL_Haptic *haptic;
/* Must be a valid joystick */
if (!SDL_PrivateJoystickValid(&joystick)) {
return NULL;
}
/* Joystick must be haptic */
if (SDL_SYS_JoystickIsHaptic(joystick) <= 0) {
return NULL;
}
/* Check to see if joystick's haptic is already open */
for (i = 0; SDL_haptics[i]; i++) {
if (SDL_SYS_JoystickSameHaptic(SDL_haptics[i], joystick)) {
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(SDL_Haptic));
if (SDL_SYS_HapticOpenFromJoystick(haptic, joystick) < 0) {
SDL_free(haptic);
return NULL;
}
/* Add haptic to list */
++haptic->ref_count;
for (i = 0; SDL_haptics[i]; i++)
/* Skip to next haptic */ ;
SDL_haptics[i] = haptic;
return haptic;
}
/*
* Closes a SDL_Haptic device.
*/
void
SDL_HapticClose(SDL_Haptic * haptic)
{
int i;
/* Must be valid */
if (!ValidHaptic(haptic)) {
return;
}
/* Check if it's still in use */
if (--haptic->ref_count < 0) {
return;
}
/* Close it, properly removing effects if needed */
for (i = 0; i < haptic->neffects; i++) {
if (haptic->effects[i].hweffect != NULL) {
SDL_HapticDestroyEffect(haptic, i);
}
}
SDL_SYS_HapticClose(haptic);
/* Remove from the list */
for (i = 0; SDL_haptics[i]; ++i) {
if (haptic == SDL_haptics[i]) {
SDL_haptics[i] = NULL;
SDL_memcpy(&SDL_haptics[i], &SDL_haptics[i + 1],
(SDL_numhaptics - i) * sizeof(haptic));
break;
}
}
/* Free */
SDL_free(haptic);
}
/*
* Cleans up after the subsystem.
*/
void
SDL_HapticQuit(void)
{
SDL_SYS_HapticQuit();
if (SDL_haptics != NULL) {
SDL_free(SDL_haptics);
SDL_haptics = NULL;
}
SDL_numhaptics = 0;
}
/*
* Returns the number of effects a haptic device has.
*/
int
SDL_HapticNumEffects(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
return haptic->neffects;
}
/*
* Returns the number of effects a haptic device can play.
*/
int
SDL_HapticNumEffectsPlaying(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
return haptic->nplaying;
}
/*
* Returns supported effects by the device.
*/
unsigned int
SDL_HapticQuery(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
return haptic->supported;
}
/*
* Returns the number of axis on the device.
*/
int
SDL_HapticNumAxes(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
return haptic->naxes;
}
/*
* Checks to see if the device can support the effect.
*/
int
SDL_HapticEffectSupported(SDL_Haptic * haptic, SDL_HapticEffect * effect)
{
if (!ValidHaptic(haptic)) {
return -1;
}
if ((haptic->supported & effect->type) != 0)
return SDL_TRUE;
return SDL_FALSE;
}
/*
* Creates a new haptic effect.
*/
int
SDL_HapticNewEffect(SDL_Haptic * haptic, SDL_HapticEffect * effect)
{
int i;
/* Check for device validity. */
if (!ValidHaptic(haptic)) {
return -1;
}
/* Check to see if effect is supported */
if (SDL_HapticEffectSupported(haptic, effect) == SDL_FALSE) {
SDL_SetError("Haptic: Effect not supported by haptic device.");
return -1;
}
/* See if there's a free slot */
for (i = 0; i < haptic->neffects; i++) {
if (haptic->effects[i].hweffect == NULL) {
/* Now let the backend create the real effect */
if (SDL_SYS_HapticNewEffect(haptic, &haptic->effects[i], effect)
!= 0) {
return -1; /* Backend failed to create effect */
}
SDL_memcpy(&haptic->effects[i].effect, effect,
sizeof(SDL_HapticEffect));
return i;
}
}
SDL_SetError("Haptic: Device has no free space left.");
return -1;
}
/*
* Checks to see if an effect is valid.
*/
static int
ValidEffect(SDL_Haptic * haptic, int effect)
{
if ((effect < 0) || (effect >= haptic->neffects)) {
SDL_SetError("Haptic: Invalid effect identifier.");
return 0;
}
return 1;
}
/*
* Updates an effect.
*/
int
SDL_HapticUpdateEffect(SDL_Haptic * haptic, int effect,
SDL_HapticEffect * data)
{
if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
return -1;
}
/* Can't change type dynamically. */
if (data->type != haptic->effects[effect].effect.type) {
SDL_SetError("Haptic: Updating effect type is illegal.");
return -1;
}
/* Updates the effect */
if (SDL_SYS_HapticUpdateEffect(haptic, &haptic->effects[effect], data) <
0) {
return -1;
}
SDL_memcpy(&haptic->effects[effect].effect, data,
sizeof(SDL_HapticEffect));
return 0;
}
/*
* Runs the haptic effect on the device.
*/
int
SDL_HapticRunEffect(SDL_Haptic * haptic, int effect, Uint32 iterations)
{
if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
return -1;
}
/* Run the effect */
if (SDL_SYS_HapticRunEffect(haptic, &haptic->effects[effect], iterations)
< 0) {
return -1;
}
return 0;
}
/*
* Stops the haptic effect on the device.
*/
int
SDL_HapticStopEffect(SDL_Haptic * haptic, int effect)
{
if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
return -1;
}
/* Stop the effect */
if (SDL_SYS_HapticStopEffect(haptic, &haptic->effects[effect]) < 0) {
return -1;
}
return 0;
}
/*
* Gets rid of a haptic effect.
*/
void
SDL_HapticDestroyEffect(SDL_Haptic * haptic, int effect)
{
if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
return;
}
/* Not allocated */
if (haptic->effects[effect].hweffect == NULL) {
return;
}
SDL_SYS_HapticDestroyEffect(haptic, &haptic->effects[effect]);
}
/*
* Gets the status of a haptic effect.
*/
int
SDL_HapticGetEffectStatus(SDL_Haptic * haptic, int effect)
{
if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
return -1;
}
if ((haptic->supported & SDL_HAPTIC_STATUS) == 0) {
SDL_SetError("Haptic: Device does not support status queries.");
return -1;
}
return SDL_SYS_HapticGetEffectStatus(haptic, &haptic->effects[effect]);
}
/*
* Sets the global gain of the device.
*/
int
SDL_HapticSetGain(SDL_Haptic * haptic, int gain)
{
const char *env;
int real_gain, max_gain;
if (!ValidHaptic(haptic)) {
return -1;
}
if ((haptic->supported & SDL_HAPTIC_GAIN) == 0) {
SDL_SetError("Haptic: Device does not support setting gain.");
return -1;
}
if ((gain < 0) || (gain > 100)) {
SDL_SetError("Haptic: Gain must be between 0 and 100.");
return -1;
}
/* We use the envvar to get the maximum gain. */
env = SDL_getenv("SDL_HAPTIC_GAIN_MAX");
if (env != NULL) {
max_gain = SDL_atoi(env);
/* Check for sanity. */
if (max_gain < 0)
max_gain = 0;
else if (max_gain > 100)
max_gain = 100;
/* We'll scale it linearly with SDL_HAPTIC_GAIN_MAX */
real_gain = (gain * max_gain) / 100;
} else {
real_gain = gain;
}
if (SDL_SYS_HapticSetGain(haptic, real_gain) < 0) {
return -1;
}
return 0;
}
/*
* Makes the device autocenter, 0 disables.
*/
int
SDL_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter)
{
if (!ValidHaptic(haptic)) {
return -1;
}
if ((haptic->supported & SDL_HAPTIC_AUTOCENTER) == 0) {
SDL_SetError("Haptic: Device does not support setting autocenter.");
return -1;
}
if ((autocenter < 0) || (autocenter > 100)) {
SDL_SetError("Haptic: Autocenter must be between 0 and 100.");
return -1;
}
if (SDL_SYS_HapticSetAutocenter(haptic, autocenter) < 0) {
return -1;
}
return 0;
}
/*
* Pauses the haptic device.
*/
int
SDL_HapticPause(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
if ((haptic->supported & SDL_HAPTIC_PAUSE) == 0) {
SDL_SetError("Haptic: Device does not support setting pausing.");
return -1;
}
return SDL_SYS_HapticPause(haptic);
}
/*
* Unpauses the haptic device.
*/
int
SDL_HapticUnpause(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
if ((haptic->supported & SDL_HAPTIC_PAUSE) == 0) {
return 0; /* Not going to be paused, so we pretend it's unpaused. */
}
return SDL_SYS_HapticUnpause(haptic);
}
/*
* Stops all the currently playing effects.
*/
int
SDL_HapticStopAll(SDL_Haptic * haptic)
{
if (!ValidHaptic(haptic)) {
return -1;
}
return SDL_SYS_HapticStopAll(haptic);
}

201
src/haptic/SDL_syshaptic.h Normal file
View file

@ -0,0 +1,201 @@
/*
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"
#include "SDL_haptic.h"
/*
* Number of haptic devices on the system.
*/
extern Uint8 SDL_numhaptics;
struct haptic_effect
{
SDL_HapticEffect effect; /* The current event */
struct haptic_hweffect *hweffect; /* The hardware behind the event */
};
/*
* The real SDL_Haptic struct.
*/
struct _SDL_Haptic
{
Uint8 index; /* Stores index it is attached to */
struct haptic_effect *effects; /* Allocated effects */
int neffects; /* Maximum amount of effects */
int nplaying; /* Maximum amount of effects to play at the same time */
unsigned int supported; /* Supported effects */
int naxes; /* Number of axes on the device. */
struct haptic_hwdata *hwdata; /* Driver dependent */
int ref_count; /* Count for multiple opens */
};
/*
* Scans the system for haptic devices.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticInit(void);
/*
* Gets the device dependent name of the haptic device
*/
extern const char *SDL_SYS_HapticName(int index);
/*
* Opens the haptic device for usage. The haptic device should have
* the index value set previously.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticOpen(SDL_Haptic * haptic);
/*
* Returns the index of the haptic core pointer or -1 if none is found.
*/
int SDL_SYS_HapticMouse(void);
/*
* Checks to see if the joystick has haptic capabilities.
*
* Returns >0 if haptic capabilities are detected, 0 if haptic
* capabilities aren't detected and -1 on error.
*/
extern int SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick);
/*
* Opens the haptic device for usage using the same device as
* the joystick.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic,
SDL_Joystick * joystick);
/*
* Checks to see if haptic device and joystick device are the same.
*
* Returns 1 if they are the same, 0 if they aren't.
*/
extern int SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic,
SDL_Joystick * joystick);
/*
* Closes a haptic device after usage.
*/
extern void SDL_SYS_HapticClose(SDL_Haptic * haptic);
/*
* Performs a cleanup on the haptic subsystem.
*/
extern void SDL_SYS_HapticQuit(void);
/*
* Creates a new haptic effect on the haptic device using base
* as a template for the effect.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticNewEffect(SDL_Haptic * haptic,
struct haptic_effect *effect,
SDL_HapticEffect * base);
/*
* Updates the haptic effect on the haptic device using data
* as a template.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticUpdateEffect(SDL_Haptic * haptic,
struct haptic_effect *effect,
SDL_HapticEffect * data);
/*
* Runs the effect on the haptic device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticRunEffect(SDL_Haptic * haptic,
struct haptic_effect *effect,
Uint32 iterations);
/*
* Stops the effect on the haptic device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticStopEffect(SDL_Haptic * haptic,
struct haptic_effect *effect);
/*
* Cleanups up the effect on the haptic device.
*/
extern void SDL_SYS_HapticDestroyEffect(SDL_Haptic * haptic,
struct haptic_effect *effect);
/*
* Queries the device for the status of effect.
*
* Returns 0 if device is stopped, >0 if device is playing and
* -1 on error.
*/
extern int SDL_SYS_HapticGetEffectStatus(SDL_Haptic * haptic,
struct haptic_effect *effect);
/*
* Sets the global gain of the haptic device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticSetGain(SDL_Haptic * haptic, int gain);
/*
* Sets the autocenter feature of the haptic device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter);
/*
* Pauses the haptic device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticPause(SDL_Haptic * haptic);
/*
* Unpauses the haptic device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticUnpause(SDL_Haptic * haptic);
/*
* Stops all the currently playing haptic effects on the device.
*
* Returns 0 on success, -1 on error.
*/
extern int SDL_SYS_HapticStopAll(SDL_Haptic * haptic);

1317
src/haptic/darwin/SDL_syshaptic.c Normal file
View file

File diff suppressed because it is too large Load diff

194
src/haptic/dummy/SDL_syshaptic.c Normal file
View file

@ -0,0 +1,194 @@
/*
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"
#if defined(SDL_HAPTIC_DUMMY) || defined(SDL_HAPTIC_DISABLED)
#include "SDL_haptic.h"
#include "../SDL_syshaptic.h"
static int
SDL_SYS_LogicError(void)
{
SDL_SetError("Logic error: No haptic devices available.");;
}
int
SDL_SYS_HapticInit(void)
{
return 0;
}
const char *
SDL_SYS_HapticName(int index)
{
SDL_SYS_LogicError();
return NULL;
}
int
SDL_SYS_HapticOpen(SDL_Haptic * haptic)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticMouse(void)
{
return -1;
}
int
SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick)
{
return 0;
}
int
SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic, SDL_Joystick * joystick)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic, SDL_Joystick * joystick)
{
return 0;
}
void
SDL_SYS_HapticClose(SDL_Haptic * haptic)
{
return;
}
void
SDL_SYS_HapticQuit(void)
{
return;
}
int
SDL_SYS_HapticNewEffect(SDL_Haptic * haptic,
struct haptic_effect *effect, SDL_HapticEffect * base)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticUpdateEffect(SDL_Haptic * haptic,
struct haptic_effect *effect,
SDL_HapticEffect * data)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticRunEffect(SDL_Haptic * haptic, struct haptic_effect *effect,
Uint32 iterations)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticStopEffect(SDL_Haptic * haptic, struct haptic_effect *effect)
{
SDL_SYS_LogicError();
return -1;
}
void
SDL_SYS_HapticDestroyEffect(SDL_Haptic * haptic, struct haptic_effect *effect)
{
SDL_SYS_LogicError();
return;
}
int
SDL_SYS_HapticGetEffectStatus(SDL_Haptic * haptic,
struct haptic_effect *effect)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticSetGain(SDL_Haptic * haptic, int gain)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticPause(SDL_Haptic * haptic)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticUnpause(SDL_Haptic * haptic)
{
SDL_SYS_LogicError();
return -1;
}
int
SDL_SYS_HapticStopAll(SDL_Haptic * haptic)
{
SDL_SYS_LogicError();
return -1;
}
#endif /* SDL_HAPTIC_DUMMY || SDL_HAPTIC_DISABLED */

956
src/haptic/linux/SDL_syshaptic.c Normal file
View file

@ -0,0 +1,956 @@
/*
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_LINUX
#include "SDL_haptic.h"
#include "../SDL_syshaptic.h"
#include "SDL_joystick.h"
#include "../../joystick/SDL_sysjoystick.h" /* For the real SDL_Joystick */
#include "../../joystick/linux/SDL_sysjoystick_c.h" /* For joystick hwdata */
#include <unistd.h> /* close */
#include <linux/input.h> /* Force feedback linux stuff. */
#include <fcntl.h> /* O_RDWR */
#include <limits.h> /* INT_MAX */
#include <errno.h> /* errno, strerror */
#include <math.h> /* atan2 */
/* Just in case. */
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
#define MAX_HAPTICS 32 /* It's doubtful someone has more then 32 evdev */
/*
* List of available haptic devices.
*/
static struct
{
char *fname; /* Dev path name (like /dev/input/event1) */
SDL_Haptic *haptic; /* Assosciated haptic. */
} SDL_hapticlist[MAX_HAPTICS];
/*
* Haptic system hardware data.
*/
struct haptic_hwdata
{
int fd; /* File descriptor of the device. */
char *fname; /* Points to the name in SDL_hapticlist. */
};
/*
* Haptic system effect data.
*/
struct haptic_hweffect
{
struct ff_effect effect; /* The linux kernel effect structure. */
};
#define test_bit(nr, addr) \
(((1UL << ((nr) & 31)) & (((const unsigned int *) addr)[(nr) >> 5])) != 0)
#define EV_TEST(ev,f) \
if (test_bit((ev), features)) ret |= (f);
/*
* Test whether a device has haptic properties.
* Returns available properties or 0 if there are none.
*/
static int
EV_IsHaptic(int fd)
{
unsigned int ret;
unsigned long features[1 + FF_MAX / sizeof(unsigned long)];
/* Ask device for what it has. */
ret = 0;
if (ioctl(fd, EVIOCGBIT(EV_FF, sizeof(features)), features) < 0) {
SDL_SetError("Haptic: Unable to get device's features: %s",
strerror(errno));
return -1;
}
/* Convert supported features to SDL_HAPTIC platform-neutral features. */
EV_TEST(FF_CONSTANT, SDL_HAPTIC_CONSTANT);
EV_TEST(FF_SINE, SDL_HAPTIC_SINE);
EV_TEST(FF_SQUARE, SDL_HAPTIC_SQUARE);
EV_TEST(FF_TRIANGLE, SDL_HAPTIC_TRIANGLE);
EV_TEST(FF_SAW_UP, SDL_HAPTIC_SAWTOOTHUP);
EV_TEST(FF_SAW_DOWN, SDL_HAPTIC_SAWTOOTHDOWN);
EV_TEST(FF_RAMP, SDL_HAPTIC_RAMP);
EV_TEST(FF_SPRING, SDL_HAPTIC_SPRING);
EV_TEST(FF_FRICTION, SDL_HAPTIC_FRICTION);
EV_TEST(FF_DAMPER, SDL_HAPTIC_DAMPER);
EV_TEST(FF_INERTIA, SDL_HAPTIC_INERTIA);
EV_TEST(FF_CUSTOM, SDL_HAPTIC_CUSTOM);
EV_TEST(FF_GAIN, SDL_HAPTIC_GAIN);
EV_TEST(FF_AUTOCENTER, SDL_HAPTIC_AUTOCENTER);
/* Return what it supports. */
return ret;
}
/*
* Tests whether a device is a mouse or not.
*/
static int
EV_IsMouse(int fd)
{
unsigned long argp[40];
/* Ask for supported features. */
if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(argp)), argp) < 0) {
return -1;
}
/* Currently we only test for BTN_MOUSE which can give fake positives. */
if (test_bit(BTN_MOUSE, argp) != 0) {
return 1;
}
return 0;
}
/*
* Initializes the haptic subsystem by finding available devices.
*/
int
SDL_SYS_HapticInit(void)
{
const char joydev_pattern[] = "/dev/input/event%d";
dev_t dev_nums[MAX_HAPTICS];
char path[PATH_MAX];
struct stat sb;
int fd;
int i, j, k;
int duplicate;
int numhaptics;
numhaptics = 0;
/*
* Limit amount of checks to MAX_HAPTICS since we may or may not have
* permission to some or all devices.
*/
i = 0;
for (j = 0; j < MAX_HAPTICS; ++j) {
snprintf(path, PATH_MAX, joydev_pattern, i++);
/* check to see if file exists */
if (stat(path, &sb) != 0)
break;
/* check for duplicates */
duplicate = 0;
for (k = 0; (k < numhaptics) && !duplicate; ++k) {
if (sb.st_rdev == dev_nums[k]) {
duplicate = 1;
}
}
if (duplicate) {
continue;
}
/* try to open */
fd = open(path, O_RDWR, 0);
if (fd < 0)
continue;
#ifdef DEBUG_INPUT_EVENTS
printf("Checking %s\n", path);
#endif
/* see if it works */
if (EV_IsHaptic(fd) > 0) {
SDL_hapticlist[numhaptics].fname = SDL_strdup(path);
SDL_hapticlist[numhaptics].haptic = NULL;
dev_nums[numhaptics] = sb.st_rdev;
++numhaptics;
}
close(fd);
}
return numhaptics;
}
/*
* Gets the name from a file descriptor.
*/
static const char *
SDL_SYS_HapticNameFromFD(int fd)
{
static char namebuf[128];
/* We use the evdev name ioctl. */
if (ioctl(fd, EVIOCGNAME(sizeof(namebuf)), namebuf) <= 0) {
return NULL;
}
return namebuf;
}
/*
* Return the name of a haptic device, does not need to be opened.
*/
const char *
SDL_SYS_HapticName(int index)
{
int fd;
const char *name;
/* Open the haptic device. */
name = NULL;
fd = open(SDL_hapticlist[index].fname, O_RDONLY, 0);
if (fd >= 0) {
name = SDL_SYS_HapticNameFromFD(fd);
if (name == NULL) {
/* No name found, return device character device */
name = SDL_hapticlist[index].fname;
}
}
close(fd);
return name;
}
/*
* Opens the haptic device from the file descriptor.
*/
static int
SDL_SYS_HapticOpenFromFD(SDL_Haptic * haptic, int fd)
{
const char *name;
/* Allocate the hwdata */
haptic->hwdata = (struct haptic_hwdata *)
SDL_malloc(sizeof(*haptic->hwdata));
if (haptic->hwdata == NULL) {
SDL_OutOfMemory();
goto open_err;
}
SDL_memset(haptic->hwdata, 0, sizeof(*haptic->hwdata));
/* Set the data. */
haptic->hwdata->fd = fd;
haptic->supported = EV_IsHaptic(fd);
haptic->naxes = 2; /* Hardcoded for now, not sure if it's possible to find out. */
/* Set the effects */
if (ioctl(fd, EVIOCGEFFECTS, &haptic->neffects) < 0) {
SDL_SetError("Haptic: Unable to query device memory: %s",
strerror(errno));
goto open_err;
}
haptic->nplaying = haptic->neffects; /* Linux makes no distinction. */
haptic->effects = (struct haptic_effect *)
SDL_malloc(sizeof(struct haptic_effect) * haptic->neffects);
if (haptic->effects == NULL) {
SDL_OutOfMemory();
goto open_err;
}
/* Clear the memory */
SDL_memset(haptic->effects, 0,
sizeof(struct haptic_effect) * haptic->neffects);
return 0;
/* Error handling */
open_err:
close(fd);
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)
{
int fd;
int ret;
/* Open the character device */
fd = open(SDL_hapticlist[haptic->index].fname, O_RDWR, 0);
if (fd < 0) {
SDL_SetError("Haptic: Unable to open %s: %s",
SDL_hapticlist[haptic->index], strerror(errno));
return -1;
}
/* Try to create the haptic. */
ret = SDL_SYS_HapticOpenFromFD(haptic, fd); /* Already closes on error. */
if (ret < 0) {
return -1;
}
/* Set the fname. */
haptic->hwdata->fname = SDL_hapticlist[haptic->index].fname;
return 0;
}
/*
* Opens a haptic device from first mouse it finds for usage.
*/
int
SDL_SYS_HapticMouse(void)
{
int fd;
int i;
for (i = 0; i < SDL_numhaptics; i++) {
/* Open the device. */
fd = open(SDL_hapticlist[i].fname, O_RDWR, 0);
if (fd < 0) {
SDL_SetError("Haptic: Unable to open %s: %s",
SDL_hapticlist[i], strerror(errno));
return -1;
}
/* Is it a mouse? */
if (EV_IsMouse(fd)) {
close(fd);
return i;
}
close(fd);
}
return -1;
}
/*
* Checks to see if a joystick has haptic features.
*/
int
SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick)
{
return EV_IsHaptic(joystick->hwdata->fd);
}
/*
* Checks to see if the haptic device and joystick and in reality the same.
*/
int
SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic, SDL_Joystick * joystick)
{
/* We are assuming linux is using evdev which should trump the old
* joystick methods. */
if (SDL_strcmp(joystick->hwdata->fname, haptic->hwdata->fname) == 0) {
return 1;
}
return 0;
}
/*
* Opens a SDL_Haptic from a SDL_Joystick.
*/
int
SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic, SDL_Joystick * joystick)
{
int i;
int fd;
int ret;
/* Find the joystick in the haptic list. */
for (i = 0; i < MAX_HAPTICS; i++) {
if (SDL_hapticlist[i].fname != NULL) {
if (SDL_strcmp(SDL_hapticlist[i].fname, joystick->hwdata->fname)
== 0) {
haptic->index = i;
}
}
}
fd = open(joystick->hwdata->fname, O_RDWR, 0);
ret = SDL_SYS_HapticOpenFromFD(haptic, fd); /* Already closes on error. */
if (ret < 0) {
return -1;
}
haptic->hwdata->fname = SDL_hapticlist[haptic->index].fname;
return 0;
}
/*
* Closes the haptic device.
*/
void
SDL_SYS_HapticClose(SDL_Haptic * haptic)
{
if (haptic->hwdata) {
/* Free effects. */
SDL_free(haptic->effects);
haptic->effects = NULL;
haptic->neffects = 0;
/* Clean up */
close(haptic->hwdata->fd);
/* Free */
SDL_free(haptic->hwdata);
haptic->hwdata = NULL;
}
/* Clear the rest. */
SDL_memset(haptic, 0, sizeof(SDL_Haptic));
}
/*
* Clean up after system specific haptic stuff
*/
void
SDL_SYS_HapticQuit(void)
{
int i;
for (i = 0; SDL_hapticlist[i].fname != NULL; i++) {
/* Opened and not closed haptics are leaked, this is on purpose.
* Close your haptic devices after usage. */
SDL_free(SDL_hapticlist[i].fname);
}
SDL_hapticlist[0].fname = NULL;
}
/*
* Converts an SDL button to a ff_trigger button.
*/
static Uint16
SDL_SYS_ToButton(Uint16 button)
{
Uint16 ff_button;
ff_button = 0;
/*
* Not sure what the proper syntax is because this actually isn't implemented
* in the current kernel from what I've seen (2.6.26).
*/
if (button != 0) {
ff_button = BTN_GAMEPAD + button - 1;
}
return ff_button;
}
/*
* Returns the ff_effect usable direction from a SDL_HapticDirection.
*/
static Uint16
SDL_SYS_ToDirection(SDL_HapticDirection * dir)
{
Uint32 tmp;
float f; /* Ideally we'd use fixed point math instead of floats... */
switch (dir->type) {
case SDL_HAPTIC_POLAR:
/* Linux directions are inverted. */
tmp = (((18000 + dir->dir[0]) % 36000) * 0xFFFF) / 36000;
return (Uint16) tmp;
case SDL_HAPTIC_CARTESIAN:
/* We must invert "x" and "y" to go clockwise. */
f = atan2(dir->dir[0], dir->dir[1]);
tmp = (int) (f * 18000. / M_PI) % 36000;
tmp = (tmp * 0xFFFF) / 36000;
return (Uint16) tmp;
case SDL_HAPTIC_SPHERICAL:
tmp = (36000 - dir->dir[0]) + 27000; /* Convert to polars */
tmp = (((18000 + tmp) % 36000) * 0xFFFF) / 36000;
return (Uint16) tmp;
default:
SDL_SetError("Haptic: Unsupported direction type.");
return (Uint16) - 1;
}
return 0;
}
#define CLAMP(x) (((x) > 32767) ? 32767 : x)
/*
* Initializes the linux effect struct from a haptic_effect.
* Values above 32767 (for unsigned) are unspecified so we must clamp.
*/
static int
SDL_SYS_ToFFEffect(struct ff_effect *dest, SDL_HapticEffect * src)
{
Uint32 tmp;
SDL_HapticConstant *constant;
SDL_HapticPeriodic *periodic;
SDL_HapticCondition *condition;
SDL_HapticRamp *ramp;
/* Clear up */
SDL_memset(dest, 0, sizeof(struct ff_effect));
switch (src->type) {
case SDL_HAPTIC_CONSTANT:
constant = &src->constant;
/* Header */
dest->type = FF_CONSTANT;
dest->direction = SDL_SYS_ToDirection(&constant->direction);
if (dest->direction == (Uint16) - 1)
return -1;
/* Replay */
dest->replay.length = (constant->length == SDL_HAPTIC_INFINITY) ?
0 : CLAMP(constant->length);
dest->replay.delay = CLAMP(constant->delay);
/* Trigger */
dest->trigger.button = SDL_SYS_ToButton(constant->button);
dest->trigger.interval = CLAMP(constant->interval);
/* Constant */
dest->u.constant.level = constant->level;
/* Envelope */
dest->u.constant.envelope.attack_length =
CLAMP(constant->attack_length);
dest->u.constant.envelope.attack_level =
CLAMP(constant->attack_level);
dest->u.constant.envelope.fade_length = CLAMP(constant->fade_length);
dest->u.constant.envelope.fade_level = CLAMP(constant->fade_level);
break;
case SDL_HAPTIC_SINE:
case SDL_HAPTIC_SQUARE:
case SDL_HAPTIC_TRIANGLE:
case SDL_HAPTIC_SAWTOOTHUP:
case SDL_HAPTIC_SAWTOOTHDOWN:
periodic = &src->periodic;
/* Header */
dest->type = FF_PERIODIC;
dest->direction = SDL_SYS_ToDirection(&periodic->direction);
if (dest->direction == (Uint16) - 1)
return -1;
/* Replay */
dest->replay.length = (periodic->length == SDL_HAPTIC_INFINITY) ?
0 : CLAMP(periodic->length);
dest->replay.delay = CLAMP(periodic->delay);
/* Trigger */
dest->trigger.button = SDL_SYS_ToButton(periodic->button);
dest->trigger.interval = CLAMP(periodic->interval);
/* Periodic */
if (periodic->type == SDL_HAPTIC_SINE)
dest->u.periodic.waveform = FF_SINE;
else if (periodic->type == SDL_HAPTIC_SQUARE)
dest->u.periodic.waveform = FF_SQUARE;
else if (periodic->type == SDL_HAPTIC_TRIANGLE)
dest->u.periodic.waveform = FF_TRIANGLE;
else if (periodic->type == SDL_HAPTIC_SAWTOOTHUP)
dest->u.periodic.waveform = FF_SAW_UP;
else if (periodic->type == SDL_HAPTIC_SAWTOOTHDOWN)
dest->u.periodic.waveform = FF_SAW_DOWN;
dest->u.periodic.period = CLAMP(periodic->period);
dest->u.periodic.magnitude = periodic->magnitude;
dest->u.periodic.offset = periodic->offset;
/* Phase is calculated based of offset from period and then clamped. */
tmp = ((periodic->phase % 36000) * dest->u.periodic.period) / 36000;
dest->u.periodic.phase = CLAMP(tmp);
/* Envelope */
dest->u.periodic.envelope.attack_length =
CLAMP(periodic->attack_length);
dest->u.periodic.envelope.attack_level =
CLAMP(periodic->attack_level);
dest->u.periodic.envelope.fade_length = CLAMP(periodic->fade_length);
dest->u.periodic.envelope.fade_level = CLAMP(periodic->fade_level);
break;
case SDL_HAPTIC_SPRING:
case SDL_HAPTIC_DAMPER:
case SDL_HAPTIC_INERTIA:
case SDL_HAPTIC_FRICTION:
condition = &src->condition;
/* Header */
if (condition->type == SDL_HAPTIC_SPRING)
dest->type = FF_SPRING;
else if (condition->type == SDL_HAPTIC_DAMPER)
dest->type = FF_DAMPER;
else if (condition->type == SDL_HAPTIC_INERTIA)
dest->type = FF_INERTIA;
else if (condition->type == SDL_HAPTIC_FRICTION)
dest->type = FF_FRICTION;
dest->direction = 0; /* Handled by the condition-specifics. */
/* Replay */
dest->replay.length = (condition->length == SDL_HAPTIC_INFINITY) ?
0 : CLAMP(condition->length);
dest->replay.delay = CLAMP(condition->delay);
/* Trigger */
dest->trigger.button = SDL_SYS_ToButton(condition->button);
dest->trigger.interval = CLAMP(condition->interval);
/* Condition */
/* X axis */
dest->u.condition[0].right_saturation =
CLAMP(condition->right_sat[0]);
dest->u.condition[0].left_saturation = CLAMP(condition->left_sat[0]);
dest->u.condition[0].right_coeff = condition->right_coeff[0];
dest->u.condition[0].left_coeff = condition->left_coeff[0];
dest->u.condition[0].deadband = CLAMP(condition->deadband[0]);
dest->u.condition[0].center = condition->center[0];
/* Y axis */
dest->u.condition[1].right_saturation =
CLAMP(condition->right_sat[1]);
dest->u.condition[1].left_saturation = CLAMP(condition->left_sat[1]);
dest->u.condition[1].right_coeff = condition->right_coeff[1];
dest->u.condition[1].left_coeff = condition->left_coeff[1];
dest->u.condition[1].deadband = CLAMP(condition->deadband[1]);
dest->u.condition[1].center = condition->center[1];
/*
* There is no envelope in the linux force feedback api for conditions.
*/
break;
case SDL_HAPTIC_RAMP:
ramp = &src->ramp;
/* Header */
dest->type = FF_RAMP;
dest->direction = SDL_SYS_ToDirection(&ramp->direction);
if (dest->direction == (Uint16) - 1)
return -1;
/* Replay */
dest->replay.length = (ramp->length == SDL_HAPTIC_INFINITY) ?
0 : CLAMP(ramp->length);
dest->replay.delay = CLAMP(ramp->delay);
/* Trigger */
dest->trigger.button = SDL_SYS_ToButton(ramp->button);
dest->trigger.interval = CLAMP(ramp->interval);
/* Ramp */
dest->u.ramp.start_level = ramp->start;
dest->u.ramp.end_level = ramp->end;
/* Envelope */
dest->u.ramp.envelope.attack_length = CLAMP(ramp->attack_length);
dest->u.ramp.envelope.attack_level = CLAMP(ramp->attack_level);
dest->u.ramp.envelope.fade_length = CLAMP(ramp->fade_length);
dest->u.ramp.envelope.fade_level = CLAMP(ramp->fade_level);
break;
default:
SDL_SetError("Haptic: Unknown effect type.");
return -1;
}
return 0;
}
/*
* Creates a new haptic effect.
*/
int
SDL_SYS_HapticNewEffect(SDL_Haptic * haptic, struct haptic_effect *effect,
SDL_HapticEffect * base)
{
struct ff_effect *linux_effect;
/* Allocate the hardware effect */
effect->hweffect = (struct haptic_hweffect *)
SDL_malloc(sizeof(struct haptic_hweffect));
if (effect->hweffect == NULL) {
SDL_OutOfMemory();
return -1;
}
/* Prepare the ff_effect */
linux_effect = &effect->hweffect->effect;
if (SDL_SYS_ToFFEffect(linux_effect, base) != 0) {
goto new_effect_err;
}
linux_effect->id = -1; /* Have the kernel give it an id */
/* Upload the effect */
if (ioctl(haptic->hwdata->fd, EVIOCSFF, linux_effect) < 0) {
SDL_SetError("Haptic: Error uploading effect to the device: %s",
strerror(errno));
goto new_effect_err;
}
return 0;
new_effect_err:
free(effect->hweffect);
effect->hweffect = NULL;
return -1;
}
/*
* Updates an effect.
*
* Note: Dynamically updating the direction can in some cases force
* the effect to restart and run once.
*/
int
SDL_SYS_HapticUpdateEffect(SDL_Haptic * haptic,
struct haptic_effect *effect,
SDL_HapticEffect * data)
{
struct ff_effect linux_effect;
/* Create the new effect */
if (SDL_SYS_ToFFEffect(&linux_effect, data) != 0) {
return -1;
}
linux_effect.id = effect->hweffect->effect.id;
/* See if it can be uploaded. */
if (ioctl(haptic->hwdata->fd, EVIOCSFF, &linux_effect) < 0) {
SDL_SetError("Haptic: Error updating the effect: %s",
strerror(errno));
return -1;
}
/* Copy the new effect into memory. */
SDL_memcpy(&effect->hweffect->effect, &linux_effect,
sizeof(struct ff_effect));
return effect->hweffect->effect.id;
}
/*
* Runs an effect.
*/
int
SDL_SYS_HapticRunEffect(SDL_Haptic * haptic, struct haptic_effect *effect,
Uint32 iterations)
{
struct input_event run;
/* Prepare to run the effect */
run.type = EV_FF;
run.code = effect->hweffect->effect.id;
/* We don't actually have infinity here, so we just do INT_MAX which is pretty damn close. */
run.value = (iterations > INT_MAX) ? INT_MAX : iterations;
if (write(haptic->hwdata->fd, (const void *) &run, sizeof(run)) < 0) {
SDL_SetError("Haptic: Unable to run the effect: %s", strerror(errno));
return -1;
}
return 0;
}
/*
* Stops an effect.
*/
int
SDL_SYS_HapticStopEffect(SDL_Haptic * haptic, struct haptic_effect *effect)
{
struct input_event stop;
stop.type = EV_FF;
stop.code = effect->hweffect->effect.id;
stop.value = 0;
if (write(haptic->hwdata->fd, (const void *) &stop, sizeof(stop)) < 0) {
SDL_SetError("Haptic: Unable to stop the effect: %s",
strerror(errno));
return -1;
}
return 0;
}
/*
* Frees the effect.
*/
void
SDL_SYS_HapticDestroyEffect(SDL_Haptic * haptic, struct haptic_effect *effect)
{
if (ioctl(haptic->hwdata->fd, EVIOCRMFF, effect->hweffect->effect.id) < 0) {
SDL_SetError("Haptic: Error removing the effect from the device: %s",
strerror(errno));
}
SDL_free(effect->hweffect);
effect->hweffect = NULL;
}
/*
* Gets the status of a haptic effect.
*/
int
SDL_SYS_HapticGetEffectStatus(SDL_Haptic * haptic,
struct haptic_effect *effect)
{
#if 0 /* Not supported atm. */
struct input_event ie;
ie.type = EV_FF;
ie.type = EV_FF_STATUS;
ie.code = effect->hweffect->effect.id;
if (write(haptic->hwdata->fd, &ie, sizeof(ie)) < 0) {
SDL_SetError("Haptic: Error getting device status.");
return -1;
}
return 0;
#endif
return -1;
}
/*
* Sets the gain.
*/
int
SDL_SYS_HapticSetGain(SDL_Haptic * haptic, int gain)
{
struct input_event ie;
ie.type = EV_FF;
ie.code = FF_GAIN;
ie.value = (0xFFFFUL * gain) / 100;
if (write(haptic->hwdata->fd, &ie, sizeof(ie)) < 0) {
SDL_SetError("Haptic: Error setting gain: %s", strerror(errno));
return -1;
}
return 0;
}
/*
* Sets the autocentering.
*/
int
SDL_SYS_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter)
{
struct input_event ie;
ie.type = EV_FF;
ie.code = FF_AUTOCENTER;
ie.value = (0xFFFFUL * autocenter) / 100;
if (write(haptic->hwdata->fd, &ie, sizeof(ie)) < 0) {
SDL_SetError("Haptic: Error setting autocenter: %s", strerror(errno));
return -1;
}
return 0;
}
/*
* Pausing is not supported atm by linux.
*/
int
SDL_SYS_HapticPause(SDL_Haptic * haptic)
{
return -1;
}
/*
* Unpausing is not supported atm by linux.
*/
int
SDL_SYS_HapticUnpause(SDL_Haptic * haptic)
{
return -1;
}
/*
* Stops all the currently playing effects.
*/
int
SDL_SYS_HapticStopAll(SDL_Haptic * haptic)
{
int i, ret;
/* Linux does not support this natively so we have to loop. */
for (i = 0; i < haptic->neffects; i++) {
if (haptic->effects[i].hweffect != NULL) {
ret = SDL_SYS_HapticStopEffect(haptic, &haptic->effects[i]);
if (ret < 0) {
SDL_SetError
("Haptic: Error while trying to stop all playing effects.");
return -1;
}
}
}
return 0;
}
#endif /* SDL_HAPTIC_LINUX */

1392
src/haptic/win32/SDL_syshaptic.c Normal file
View file

File diff suppressed because it is too large Load diff