src/haptic/darwin/SDL_syshaptic.c
author Edgar Simo <bobbens@gmail.com>
Tue, 15 Jul 2008 17:35:06 +0000
branchgsoc2008_force_feedback
changeset 2522 0877146be013
parent 2521 7aa91c21ce5f
child 2527 924a32719b6f
permissions -rw-r--r--
Now compiles cleanly (has yet to work though).
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 2008 Edgar Simo
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#ifdef SDL_HAPTIC_IOKIT
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#include "SDL_haptic.h"
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#include "../SDL_syshaptic.h"
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#include "SDL_joystick.h"
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#include "../../joystick/SDL_sysjoystick.h" /* For the real SDL_Joystick */
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/*#include "../../joystick/dawrin/SDL_sysjoystick_c.h"*/ /* For joystick hwdata */ 
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#include <IOKit/IOKitLib.h>
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#include <IOKit/hid/IOHIDKeys.h>
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#include <ForceFeedback/ForceFeedback.h>
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#include <ForceFeedback/ForceFeedbackConstants.h>
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#define MAX_HAPTICS  32
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/*
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 * List of available haptic devices.
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 */
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static struct
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{
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   io_service_t dev;
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   SDL_Haptic *haptic;
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} SDL_hapticlist[MAX_HAPTICS];
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/*
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 * Haptic system hardware data.
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 */
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struct haptic_hwdata
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{
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   FFDeviceObjectReference device; /* Hardware device. */
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};
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/*
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 * Haptic system effect data.
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 */
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struct haptic_hweffect
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{
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   FFEffectObjectReference ref; /* Reference. */
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   struct FFEFFECT effect; /* Hardware effect. */
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};
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/*
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 * Initializes the haptic subsystem.
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 */
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int
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SDL_SYS_HapticInit(void)
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{
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   int numhaptics;
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   IOReturn result;
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   io_iterator_t iter;
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   CFDictionaryRef match;
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   io_service_t device;
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   /* Get HID devices. */
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   match = IOServiceMatching(kIOHIDDeviceKey);
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   if (match == NULL) {
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      SDL_SetError("Haptic: Failed to get IOServiceMatching.");
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      return -1;
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   }
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   /* Now search I/O Registry for matching devices. */
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   result = IOServiceGetMatchingServices(kIOMasterPortDefault, match, &iter);
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   if (result != kIOReturnSuccess) {
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      SDL_SetError("Haptic: Couldn't create a HID object iterator.");
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      return -1;
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   }
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   /* IOServiceGetMatchingServices consumes dictionary. */
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   numhaptics = 0;
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   while ((device = IOIteratorNext(iter)) != IO_OBJECT_NULL) {
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      /* Check for force feedback. */
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      if (FFIsForceFeedback(device) == FF_OK) {
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         SDL_hapticlist[numhaptics].dev = device;
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         SDL_hapticlist[numhaptics].haptic = NULL;
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         numhaptics++;
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      }
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      /* Reached haptic limit. */
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      if (numhaptics >= MAX_HAPTICS)
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         break;
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   }
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   IOObjectRelease(iter);
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   return numhaptics;
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}
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/*
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 * Return the name of a haptic device, does not need to be opened.
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 */
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const char *
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SDL_SYS_HapticName(int index)
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{
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   return NULL;
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}
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#define FF_TEST(ff, s) \
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if (features.supportedEffects & ff) supported |= s
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/*
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 * Gets supported features.
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 */
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static unsigned int
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GetSupportedFeatures(FFDeviceObjectReference device,
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                     int *neffects, int *nplaying)
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{
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   HRESULT ret;
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   FFCAPABILITIES features;
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   unsigned int supported;
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   Uint32 val;
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   ret = FFDeviceGetForceFeedbackCapabilities(device, &features);
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   if (ret != FF_OK) {
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      SDL_SetError("Haptic: Unable to get device's supported features.");
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      return 0;
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   }
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   supported = 0;
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   /* Get maximum effects. */
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   *neffects = features.storageCapacity;
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   *nplaying = features.playbackCapacity;
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   /* Test for effects. */
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   FF_TEST(FFCAP_ET_CONSTANTFORCE, SDL_HAPTIC_CONSTANT);
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   FF_TEST(FFCAP_ET_RAMPFORCE,     SDL_HAPTIC_RAMP);
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   FF_TEST(FFCAP_ET_SQUARE,        SDL_HAPTIC_SQUARE);
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   FF_TEST(FFCAP_ET_SINE,          SDL_HAPTIC_SINE);
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   FF_TEST(FFCAP_ET_TRIANGLE,      SDL_HAPTIC_TRIANGLE);
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   FF_TEST(FFCAP_ET_SAWTOOTHUP,    SDL_HAPTIC_SAWTOOTHUP);
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   FF_TEST(FFCAP_ET_SAWTOOTHDOWN,  SDL_HAPTIC_SAWTOOTHDOWN);
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   FF_TEST(FFCAP_ET_SPRING,        SDL_HAPTIC_SPRING);
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   FF_TEST(FFCAP_ET_DAMPER,        SDL_HAPTIC_DAMPER);
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   FF_TEST(FFCAP_ET_INERTIA,       SDL_HAPTIC_INERTIA);
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   FF_TEST(FFCAP_ET_FRICTION,      SDL_HAPTIC_FRICTION);
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   FF_TEST(FFCAP_ET_CUSTOMFORCE,   SDL_HAPTIC_CUSTOM);
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   /* Check if supports gain. */
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   ret = FFDeviceGetForceFeedbackProperty(device, FFPROP_FFGAIN,
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                                          &val, sizeof(val));
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   if (ret == FF_OK) supported |= SDL_HAPTIC_GAIN;
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   else if (ret != FFERR_UNSUPPORTED) {
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      SDL_SetError("Haptic: Unable to get if device supports gain.");
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      return 0;
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   }
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   /* Checks if supports autocenter. */
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   ret = FFDeviceGetForceFeedbackProperty(device, FFPROP_AUTOCENTER,
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                                          &val, sizeof(val));
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   if (ret == FF_OK) supported |= SDL_HAPTIC_AUTOCENTER;
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   else if (ret != FFERR_UNSUPPORTED) {
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      SDL_SetError("Haptic: Unable to get if device supports autocenter.");
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      return 0;
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   }
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   /* Always supported features. */
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   supported |= SDL_HAPTIC_STATUS;
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   return supported;
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}
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/*
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 * Opens the haptic device from the file descriptor.
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 */
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static int
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SDL_SYS_HapticOpenFromService(SDL_Haptic * haptic, io_service_t service)
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{
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   /* Allocate the hwdata */
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   haptic->hwdata = (struct haptic_hwdata *)
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         SDL_malloc(sizeof(*haptic->hwdata));
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   if (haptic->hwdata == NULL) {
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      SDL_OutOfMemory();
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      goto creat_err;
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   }
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   SDL_memset(haptic->hwdata, 0, sizeof(*haptic->hwdata));
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   /* Open the device */
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   if (FFCreateDevice( service, &haptic->hwdata->device ) != FF_OK) {
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      SDL_SetError("Haptic: Unable to create device from service.");
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      goto creat_err;
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   }
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   /* Get supported features. */
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   haptic->supported = GetSupportedFeatures(haptic->hwdata->device,
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                                            &haptic->neffects, &haptic->nplaying);
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   if (haptic->supported == 0) { /* Error since device supports nothing. */
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      goto open_err;
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   }
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   haptic->effects = (struct haptic_effect *)
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         SDL_malloc(sizeof(struct haptic_effect) * haptic->neffects);
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   if (haptic->effects == NULL) {
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      SDL_OutOfMemory();
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      goto open_err;
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   }
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   /* Clear the memory */
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   SDL_memset(haptic->effects, 0,
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         sizeof(struct haptic_effect) * haptic->neffects);
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   return 0;
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   /* Error handling */
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open_err:
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   FFReleaseDevice(haptic->hwdata->device);
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creat_err:
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   if (haptic->hwdata != NULL) {
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      free(haptic->hwdata);
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      haptic->hwdata = NULL;                                              
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   }
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   return -1;
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}
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/*
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 * Opens a haptic device for usage.
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 */
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int
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SDL_SYS_HapticOpen(SDL_Haptic * haptic)
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{
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   return SDL_SYS_HapticOpenFromService(haptic,
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                SDL_hapticlist[haptic->index].dev);
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}
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/*
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 * Opens a haptic device from first mouse it finds for usage.
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 */
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int
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SDL_SYS_HapticMouse(void)
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{
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   return -1;
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}
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/*
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 * Checks to see if a joystick has haptic features.
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 */
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int
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SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick)
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{
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   return SDL_FALSE;
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}
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   273
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/*
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 * Checks to see if the haptic device and joystick and in reality the same.
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 */
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int
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SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic, SDL_Joystick * joystick)
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{
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   if (SDL_strcmp(joystick->name,haptic->name)==0) {
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      return 1;
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   }
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   return 0;
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}
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/*
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 * Opens a SDL_Haptic from a SDL_Joystick.
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 */
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int
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SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic, SDL_Joystick * joystick)
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{
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   return -1;
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}
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/*
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 * Closes the haptic device.
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 */
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void
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SDL_SYS_HapticClose(SDL_Haptic * haptic)
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{
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   int i;
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   304
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   305
   if (haptic->hwdata) {
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   306
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      /* Clean up */
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      FFReleaseDevice(haptic->hwdata->device);
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   309
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      /* Free */
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      SDL_free(haptic->hwdata);
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      haptic->hwdata = NULL;
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   313
      for (i=0; i<haptic->neffects; i++) {
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   314
         if (haptic->effects[i].hweffect != NULL)
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            SDL_free(haptic->effects[i].hweffect->effect.lpvTypeSpecificParams);
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   316
      }
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      SDL_free(haptic->effects);
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      haptic->neffects = 0;
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   319
   }
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   320
}
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   321
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   322
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   323
/* 
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   324
 * Clean up after system specific haptic stuff
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   325
 */
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   326
void
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   327
SDL_SYS_HapticQuit(void)
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   328
{
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   329
   int i;
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   330
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   331
   for (i=0; i < SDL_numhaptics; i++) {
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   332
      IOObjectRelease(SDL_hapticlist[i].dev);
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   333
      /* TODO free effects. */
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   334
   }
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   335
}
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   336
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   337
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   338
/*
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 * Sets the direction.
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   340
 */
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   341
static int
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   342
SDL_SYS_SetDirection( FFEFFECT * effect, SDL_HapticDirection *dir, int axes )
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   343
{
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   344
   LONG *rglDir;
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   345
   dir = SDL_malloc( sizeof(LONG) * axes );
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   346
   if (dir == NULL) {
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   347
      SDL_OutOfMemory();
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   348
      return -1;
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   349
   }
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   350
   SDL_memset( dir, 0, sizeof(LONG) * axes );
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   351
   effect->rglDirection = rglDir;
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   352
bobbens@2520
   353
   switch (dir->type) {
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   354
      case SDL_HAPTIC_POLAR:
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   355
         effect->dwFlags |= FFEFF_POLAR;
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   356
         rglDir[0] = dir->dir[0];
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   357
         return 0;
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   358
      case SDL_HAPTIC_CARTESIAN:
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   359
         effect->dwFlags |= FFEFF_CARTESIAN;
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   360
         rglDir[0] = dir->dir[0];
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   361
         rglDir[1] = dir->dir[1];
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   362
         rglDir[2] = dir->dir[2];
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   363
         return 0;
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   364
      case SDL_HAPTIC_SPHERICAL:
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   365
         effect->dwFlags |= FFEFF_SPHERICAL;
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   366
         rglDir[0] = dir->dir[0];
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   367
         rglDir[1] = dir->dir[1];
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   368
         rglDir[2] = dir->dir[2];
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   369
         return 0;
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   370
bobbens@2520
   371
      default:
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   372
         SDL_SetError("Haptic: Unknown direction type.");
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   373
         return -1;
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   374
   }
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   375
}
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   376
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   377
#define CONVERT(x)   (((x)*10000) / 0xFFFF )
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   378
/*
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   379
 * Creates the FFStruct
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   380
 */
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   381
static int
bobbens@2520
   382
SDL_SYS_ToFFEFFECT( FFEFFECT * dest, SDL_HapticEffect * src )
bobbens@2520
   383
{
bobbens@2520
   384
   FFCONSTANTFORCE *constant;
bobbens@2520
   385
   FFPERIODIC *periodic;
bobbens@2520
   386
   FFCONDITION *condition;
bobbens@2520
   387
   FFRAMPFORCE *ramp;
bobbens@2520
   388
   FFCUSTOMFORCE *custom;
bobbens@2522
   389
   FFENVELOPE *envelope;
bobbens@2520
   390
   SDL_HapticConstant *hap_constant;
bobbens@2521
   391
   SDL_HapticPeriodic *hap_periodic;
bobbens@2520
   392
   SDL_HapticCondition *hap_condition;
bobbens@2520
   393
   SDL_HapticRamp *hap_ramp;
bobbens@2520
   394
bobbens@2520
   395
   /* Set global stuff. */
bobbens@2520
   396
   SDL_memset(dest, 0, sizeof(FFEFFECT));
bobbens@2520
   397
   dest->dwSize = sizeof(FFEFFECT); /* Set the structure size. */
bobbens@2520
   398
   dest->dwSamplePeriod = 0; /* Not used by us. */
bobbens@2520
   399
   dest->dwGain = 10000; /* Gain is set globally, not locally. */
bobbens@2522
   400
bobbens@2522
   401
   /* Envelope. */
bobbens@2522
   402
   envelope = SDL_malloc( sizeof(FFENVELOPE) );
bobbens@2522
   403
   if (envelope == NULL) {
bobbens@2522
   404
      SDL_OutOfMemory();
bobbens@2522
   405
      return -1;
bobbens@2522
   406
   }
bobbens@2522
   407
   SDL_memset(envelope, 0, sizeof(FFENVELOPE));
bobbens@2522
   408
   dest->lpEnvelope = envelope;
bobbens@2522
   409
   envelope->dwSize = sizeof(FFENVELOPE); /* Always should be this. */
bobbens@2520
   410
bobbens@2520
   411
   switch (src->type) {
bobbens@2520
   412
      case SDL_HAPTIC_CONSTANT:
bobbens@2520
   413
         hap_constant = &src->constant;
bobbens@2520
   414
         constant = SDL_malloc( sizeof(FFCONSTANTFORCE) );
bobbens@2520
   415
bobbens@2520
   416
         /* Specifics */
bobbens@2520
   417
         constant->lMagnitude = CONVERT(hap_constant->level);
bobbens@2520
   418
         dest->cbTypeSpecificParams = sizeof(FFCONSTANTFORCE); 
bobbens@2520
   419
         dest->lpvTypeSpecificParams = constant;
bobbens@2520
   420
bobbens@2520
   421
         /* Generics */
bobbens@2521
   422
         dest->dwDuration = hap_constant->length * 1000; /* In microseconds. */
bobbens@2520
   423
         dest->dwTriggerButton = FFJOFS_BUTTON(hap_constant->button);
bobbens@2520
   424
         dest->dwTriggerRepeatInterval = hap_constant->interval;
bobbens@2521
   425
         dest->dwStartDelay = hap_constant->delay * 1000; /* In microseconds. */
bobbens@2520
   426
bobbens@2520
   427
         /* Axes */
bobbens@2520
   428
         dest->cAxes = 2; /* TODO handle */
bobbens@2520
   429
         dest->rgdwAxes = 0;
bobbens@2520
   430
bobbens@2520
   431
         /* Direction. */
bobbens@2522
   432
         if (SDL_SYS_SetDirection(dest, &hap_constant->direction, dest->cAxes) < 0) {
bobbens@2520
   433
            return -1;
bobbens@2520
   434
         }
bobbens@2520
   435
         
bobbens@2520
   436
         /* Envelope */
bobbens@2522
   437
         envelope->dwAttackLevel = CONVERT(hap_constant->attack_level);
bobbens@2522
   438
         envelope->dwAttackTime = hap_constant->attack_length * 1000;
bobbens@2522
   439
         envelope->dwFadeLevel = CONVERT(hap_constant->fade_level);
bobbens@2522
   440
         envelope->dwFadeTime = hap_constant->fade_length * 1000;
bobbens@2520
   441
bobbens@2520
   442
         break;
bobbens@2520
   443
bobbens@2520
   444
         /* TODO finish */
bobbens@2520
   445
bobbens@2520
   446
      case SDL_HAPTIC_SINE:
bobbens@2520
   447
      case SDL_HAPTIC_SQUARE:
bobbens@2520
   448
      case SDL_HAPTIC_TRIANGLE:
bobbens@2520
   449
      case SDL_HAPTIC_SAWTOOTHUP:
bobbens@2520
   450
      case SDL_HAPTIC_SAWTOOTHDOWN:
bobbens@2522
   451
         hap_periodic = &src->periodic;
bobbens@2520
   452
bobbens@2520
   453
         break;
bobbens@2520
   454
bobbens@2520
   455
      case SDL_HAPTIC_SPRING:
bobbens@2520
   456
      case SDL_HAPTIC_DAMPER:
bobbens@2520
   457
      case SDL_HAPTIC_INERTIA:
bobbens@2520
   458
      case SDL_HAPTIC_FRICTION:
bobbens@2522
   459
         hap_condition = &src->condition;
bobbens@2520
   460
bobbens@2520
   461
         break;
bobbens@2520
   462
bobbens@2520
   463
      case SDL_HAPTIC_RAMP:
bobbens@2522
   464
         hap_ramp = &src->ramp;
bobbens@2520
   465
bobbens@2520
   466
         break;
bobbens@2520
   467
bobbens@2520
   468
bobbens@2520
   469
      default:
bobbens@2520
   470
         SDL_SetError("Haptic: Unknown effect type.");
bobbens@2520
   471
         return -1;
bobbens@2520
   472
   }
bobbens@2520
   473
bobbens@2520
   474
   return 0;
bobbens@2520
   475
}
bobbens@2520
   476
bobbens@2520
   477
bobbens@2520
   478
/*
bobbens@2520
   479
 * Gets the effect type from the generic SDL haptic effect wrapper.
bobbens@2520
   480
 */
bobbens@2520
   481
CFUUIDRef SDL_SYS_HapticEffectType(struct haptic_effect * effect)
bobbens@2520
   482
{
bobbens@2521
   483
   switch (effect->effect.type) {
bobbens@2520
   484
      case SDL_HAPTIC_CONSTANT:
bobbens@2520
   485
         return kFFEffectType_ConstantForce_ID;
bobbens@2520
   486
bobbens@2520
   487
      case SDL_HAPTIC_RAMP:
bobbens@2520
   488
         return kFFEffectType_RampForce_ID;
bobbens@2520
   489
bobbens@2520
   490
      case SDL_HAPTIC_SQUARE:
bobbens@2520
   491
         return kFFEffectType_Square_ID;
bobbens@2520
   492
bobbens@2520
   493
      case SDL_HAPTIC_SINE:
bobbens@2520
   494
         return kFFEffectType_Sine_ID;
bobbens@2520
   495
bobbens@2521
   496
      case SDL_HAPTIC_TRIANGLE:
bobbens@2520
   497
         return kFFEffectType_Triangle_ID;
bobbens@2520
   498
bobbens@2520
   499
      case SDL_HAPTIC_SAWTOOTHUP:
bobbens@2520
   500
         return kFFEffectType_SawtoothUp_ID;
bobbens@2520
   501
bobbens@2520
   502
      case SDL_HAPTIC_SAWTOOTHDOWN:
bobbens@2520
   503
         return kFFEffectType_SawtoothDown_ID;
bobbens@2520
   504
bobbens@2520
   505
      case SDL_HAPTIC_SPRING:
bobbens@2520
   506
         return kFFEffectType_Spring_ID;
bobbens@2520
   507
bobbens@2520
   508
      case SDL_HAPTIC_DAMPER:
bobbens@2520
   509
         return kFFEffectType_Damper_ID;
bobbens@2520
   510
bobbens@2520
   511
      case SDL_HAPTIC_INERTIA:
bobbens@2520
   512
         return kFFEffectType_Inertia_ID;
bobbens@2520
   513
bobbens@2520
   514
      case SDL_HAPTIC_FRICTION:
bobbens@2520
   515
         return kFFEffectType_Friction_ID;
bobbens@2520
   516
bobbens@2520
   517
      case SDL_HAPTIC_CUSTOM:
bobbens@2520
   518
         return kFFEffectType_CustomForce_ID;
bobbens@2520
   519
bobbens@2520
   520
      default:
bobbens@2520
   521
         SDL_SetError("Haptic: Unknown effect type.");
bobbens@2520
   522
         return NULL;
bobbens@2520
   523
   }
bobbens@2520
   524
}
bobbens@2520
   525
bobbens@2520
   526
bobbens@2520
   527
/*
bobbens@2520
   528
 * Creates a new haptic effect.
bobbens@2520
   529
 */
bobbens@2520
   530
int
bobbens@2520
   531
SDL_SYS_HapticNewEffect(SDL_Haptic * haptic, struct haptic_effect * effect,
bobbens@2520
   532
      SDL_HapticEffect * base)
bobbens@2520
   533
{
bobbens@2520
   534
   HRESULT ret;
bobbens@2520
   535
   CFUUIDRef type;
bobbens@2520
   536
bobbens@2520
   537
   /* Alloc the effect. */
bobbens@2520
   538
   effect->hweffect = (struct haptic_hweffect *)
bobbens@2520
   539
         SDL_malloc(sizeof(struct haptic_hweffect));
bobbens@2520
   540
   if (effect->hweffect == NULL) {
bobbens@2520
   541
      SDL_OutOfMemory();
bobbens@2520
   542
      return -1;
bobbens@2520
   543
   }
bobbens@2520
   544
bobbens@2520
   545
   /* Get the type. */
bobbens@2520
   546
   type = SDL_SYS_HapticEffectType(effect);
bobbens@2520
   547
   if (type == NULL) {
bobbens@2520
   548
      SDL_free(effect->hweffect);
bobbens@2520
   549
      effect->hweffect = NULL;
bobbens@2520
   550
      return -1;
bobbens@2520
   551
   }
bobbens@2520
   552
bobbens@2520
   553
   /* Get the effect. */
bobbens@2521
   554
   if (SDL_SYS_ToFFEFFECT( &effect->hweffect->effect, &effect->effect ) < 0) {
bobbens@2520
   555
      /* TODO cleanup alloced stuff. */
bobbens@2520
   556
      return -1;
bobbens@2520
   557
   }
bobbens@2520
   558
bobbens@2520
   559
   ret = FFDeviceCreateEffect( haptic->hwdata->device, type,
bobbens@2520
   560
         &effect->hweffect->effect, &effect->hweffect->ref );
bobbens@2520
   561
}
bobbens@2520
   562
bobbens@2520
   563
bobbens@2520
   564
/*
bobbens@2520
   565
 * Updates an effect.
bobbens@2520
   566
 */
bobbens@2520
   567
int SDL_SYS_HapticUpdateEffect(SDL_Haptic * haptic,
bobbens@2520
   568
      struct haptic_effect * effect, SDL_HapticEffect * data)
bobbens@2520
   569
{
bobbens@2520
   570
   /* TODO */
bobbens@2520
   571
   return -1;
bobbens@2520
   572
}
bobbens@2520
   573
bobbens@2520
   574
bobbens@2520
   575
/*
bobbens@2520
   576
 * Runs an effect.
bobbens@2520
   577
 */
bobbens@2520
   578
int
bobbens@2520
   579
SDL_SYS_HapticRunEffect(SDL_Haptic * haptic, struct haptic_effect * effect,
bobbens@2520
   580
                        Uint32 iterations)
bobbens@2520
   581
{
bobbens@2520
   582
   HRESULT ret;
bobbens@2520
   583
   Uint32 iter;
bobbens@2520
   584
bobbens@2520
   585
   /* Check if it's infinite. */
bobbens@2520
   586
   if (iterations == SDL_HAPTIC_INFINITY) {
bobbens@2521
   587
      iter = FF_INFINITE;
bobbens@2520
   588
   }
bobbens@2520
   589
   else
bobbens@2520
   590
      iter = iterations;
bobbens@2520
   591
bobbens@2520
   592
   /* Run the effect. */
bobbens@2520
   593
   ret = FFEffectStart(effect->hweffect->ref, iter, 0);
bobbens@2520
   594
   if (ret != FF_OK) {
bobbens@2520
   595
      SDL_SetError("Haptic: Unable to run the effect.");
bobbens@2520
   596
      return -1;
bobbens@2520
   597
   }
bobbens@2520
   598
bobbens@2520
   599
   return 0;
bobbens@2520
   600
}
bobbens@2520
   601
bobbens@2520
   602
bobbens@2520
   603
/*
bobbens@2520
   604
 * Stops an effect.
bobbens@2520
   605
 */
bobbens@2520
   606
int
bobbens@2520
   607
SDL_SYS_HapticStopEffect(SDL_Haptic * haptic, struct haptic_effect * effect)
bobbens@2520
   608
{
bobbens@2520
   609
   HRESULT ret;
bobbens@2520
   610
bobbens@2520
   611
   ret = FFEffectStop(effect->hweffect->ref);
bobbens@2520
   612
   if (ret != FF_OK) {
bobbens@2520
   613
      SDL_SetError("Haptic: Unable to stop the effect.");
bobbens@2520
   614
      return -1;
bobbens@2520
   615
   }
bobbens@2520
   616
bobbens@2520
   617
   return 0;
bobbens@2520
   618
}
bobbens@2520
   619
bobbens@2520
   620
bobbens@2520
   621
/*
bobbens@2520
   622
 * Frees the effect.
bobbens@2520
   623
 */
bobbens@2520
   624
void
bobbens@2520
   625
SDL_SYS_HapticDestroyEffect(SDL_Haptic * haptic, struct haptic_effect * effect)
bobbens@2520
   626
{
bobbens@2520
   627
   HRESULT ret;
bobbens@2520
   628
bobbens@2520
   629
   ret = FFDeviceReleaseEffect(haptic->hwdata->device, effect->hweffect->ref);
bobbens@2520
   630
   if (ret != FF_OK) {
bobbens@2520
   631
      SDL_SetError("Haptic: Error removing the effect from the device.");
bobbens@2520
   632
   }
bobbens@2520
   633
   SDL_free(effect->hweffect->effect.lpvTypeSpecificParams);
bobbens@2520
   634
   effect->hweffect->effect.lpvTypeSpecificParams = NULL;
bobbens@2520
   635
   SDL_free(effect->hweffect);
bobbens@2520
   636
   effect->hweffect = NULL;
bobbens@2520
   637
}
bobbens@2520
   638
bobbens@2520
   639
bobbens@2520
   640
/*
bobbens@2520
   641
 * Gets the status of a haptic effect.
bobbens@2520
   642
 */
bobbens@2520
   643
int
bobbens@2520
   644
SDL_SYS_HapticGetEffectStatus(SDL_Haptic * haptic, struct haptic_effect * effect)
bobbens@2520
   645
{
bobbens@2520
   646
   HRESULT ret;
bobbens@2520
   647
   FFEffectStatusFlag status;
bobbens@2520
   648
bobbens@2521
   649
   ret = FFEffectGetEffectStatus(effect->hweffect->ref, &status);
bobbens@2520
   650
   if (ret != FF_OK) {
bobbens@2520
   651
      SDL_SetError("Haptic: Unable to get effect status.");
bobbens@2520
   652
      return -1;
bobbens@2520
   653
   }
bobbens@2520
   654
bobbens@2520
   655
   if (status == 0) return SDL_FALSE;
bobbens@2520
   656
   return SDL_TRUE; /* Assume it's playing or emulated. */
bobbens@2520
   657
}
bobbens@2520
   658
bobbens@2520
   659
bobbens@2520
   660
/*
bobbens@2520
   661
 * Sets the gain.
bobbens@2520
   662
 */
bobbens@2520
   663
int
bobbens@2520
   664
SDL_SYS_HapticSetGain(SDL_Haptic * haptic, int gain)
bobbens@2520
   665
{
bobbens@2520
   666
   HRESULT ret;
bobbens@2520
   667
   Uint32 val;
bobbens@2520
   668
bobbens@2520
   669
   val = gain * 100; /* Mac OS X uses 0 to 10,000 */
bobbens@2520
   670
   ret = FFDeviceSetForceFeedbackProperty(haptic->hwdata->device, FFPROP_FFGAIN, &val);
bobbens@2520
   671
   if (ret != FF_OK) {
bobbens@2520
   672
      SDL_SetError("Haptic: Error setting gain.");
bobbens@2520
   673
      return -1;
bobbens@2520
   674
   }
bobbens@2520
   675
bobbens@2520
   676
   return 0;
bobbens@2520
   677
}
bobbens@2520
   678
bobbens@2520
   679
bobbens@2520
   680
/*
bobbens@2520
   681
 * Sets the autocentering.
bobbens@2520
   682
 */
bobbens@2520
   683
int
bobbens@2520
   684
SDL_SYS_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter)
bobbens@2520
   685
{
bobbens@2520
   686
   HRESULT ret;
bobbens@2520
   687
   Uint32 val;
bobbens@2520
   688
bobbens@2520
   689
   /* Mac OS X only has 0 (off) and 1 (on) */
bobbens@2520
   690
   if (autocenter == 0) val = 0;
bobbens@2520
   691
   else val = 1;
bobbens@2520
   692
bobbens@2520
   693
   ret = FFDeviceSetForceFeedbackProperty(haptic->hwdata->device,
bobbens@2521
   694
               FFPROP_AUTOCENTER, &val);
bobbens@2520
   695
   if (ret != FF_OK) {
bobbens@2520
   696
      SDL_SetError("Haptic: Error setting autocenter.");
bobbens@2520
   697
      return -1;
bobbens@2520
   698
   }
bobbens@2520
   699
  
bobbens@2520
   700
   return 0;
bobbens@2520
   701
bobbens@2520
   702
}
bobbens@2520
   703
bobbens@2520
   704
bobbens@2520
   705
#endif /* SDL_HAPTIC_LINUX */