dlls/dinput/effect_linuxinput.c

   1 /*              DirectInput Linux Event Device Effect
   2  *
   3  * Copyright 2005 Daniel Remenak
   4  *
   5  * Thanks to Google's Summer of Code Program (2005)
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23
  24 #ifdef HAVE_STRUCT_FF_EFFECT_DIRECTION
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #ifdef HAVE_LINUX_INPUT_H
  29 #  include <linux/input.h>
  30 #endif
  31 #include <errno.h>
  32 #ifdef HAVE_UNISTD_H
  33 #  include <unistd.h>
  34 #endif
  35 #include <math.h>
  36 #include "wine/debug.h"
  37 #include "wine/unicode.h"
  38 #include "windef.h"
  39 #include "winbase.h"
  40 #include "winerror.h"
  41 #include "dinput.h"
  42
  43 #include "device_private.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(dinput);
  46
  47 static const IDirectInputEffectVtbl LinuxInputEffectVtbl;
  48 typedef struct LinuxInputEffectImpl LinuxInputEffectImpl;
  49 struct LinuxInputEffectImpl
  50 {
  51     const void *lpVtbl;
  52     LONG        ref;
  53     GUID        guid;
  54
  55     /* Effect data */
  56     struct ff_effect effect;
  57
  58     /* Parent device */
  59     int*        fd;
  60 };
  61
  62
  63 /******************************************************************************
  64  *      DirectInputEffect Functional Helper
  65  */
  66
  67 static DWORD _typeFromGUID(REFGUID guid)
  68 {
  69     if (IsEqualGUID(guid, &GUID_ConstantForce)) {
  70         return DIEFT_CONSTANTFORCE;
  71     } else if (IsEqualGUID(guid, &GUID_Square)
  72             || IsEqualGUID(guid, &GUID_Sine)
  73             || IsEqualGUID(guid, &GUID_Triangle)
  74             || IsEqualGUID(guid, &GUID_SawtoothUp)
  75             || IsEqualGUID(guid, &GUID_SawtoothDown)) {
  76         return DIEFT_PERIODIC;
  77     } else if (IsEqualGUID(guid, &GUID_RampForce)) {
  78         return DIEFT_RAMPFORCE;
  79     } else if (IsEqualGUID(guid, &GUID_Spring)
  80             || IsEqualGUID(guid, &GUID_Damper)
  81             || IsEqualGUID(guid, &GUID_Inertia)
  82             || IsEqualGUID(guid, &GUID_Friction)) {
  83         return DIEFT_CONDITION;
  84     } else if (IsEqualGUID(guid, &GUID_CustomForce)) {
  85         return DIEFT_CUSTOMFORCE;
  86     } else {
  87         WARN("GUID (%s) is not a known force type\n", _dump_dinput_GUID(guid));
  88         return 0;
  89     }
  90 }
  91
  92
  93 /******************************************************************************
  94  *      DirectInputEffect debug helpers
  95  */
  96
  97 static void _dump_DIEFFECT_flags(DWORD dwFlags)
  98 {
  99     if (TRACE_ON(dinput)) {
 100         unsigned int   i;
 101         static const struct {
 102             DWORD       mask;
 103             const char  *name;
 104         } flags[] = {
 105 #define FE(x) { x, #x}
 106             FE(DIEFF_CARTESIAN),
 107             FE(DIEFF_OBJECTIDS),
 108             FE(DIEFF_OBJECTOFFSETS),
 109             FE(DIEFF_POLAR),
 110             FE(DIEFF_SPHERICAL)
 111 #undef FE
 112         };
 113         for (i = 0; i < (sizeof(flags) / sizeof(flags[0])); i++)
 114             if (flags[i].mask & dwFlags)
 115                 DPRINTF("%s ", flags[i].name);
 116         DPRINTF("\n");
 117     }
 118 }
 119
 120 static void _dump_DIENVELOPE(LPDIENVELOPE env)
 121 {
 122     if (env->dwSize != sizeof(DIENVELOPE)) {
 123         WARN("Non-standard DIENVELOPE structure size (%ld instead of %d).\n",
 124              env->dwSize, sizeof(DIENVELOPE));
 125     }
 126     TRACE("Envelope has attack (level: %ld time: %ld), fade (level: %ld time: %ld)\n",
 127           env->dwAttackLevel, env->dwAttackTime, env->dwFadeLevel, env->dwFadeTime);
 128 }
 129
 130 static void _dump_DICONSTANTFORCE(LPDICONSTANTFORCE frc)
 131 {
 132     TRACE("Constant force has magnitude %ld\n", frc->lMagnitude);
 133 }
 134
 135 static void _dump_DIPERIODIC(LPDIPERIODIC frc)
 136 {
 137     TRACE("Periodic force has magnitude %ld, offset %ld, phase %ld, period %ld\n",
 138           frc->dwMagnitude, frc->lOffset, frc->dwPhase, frc->dwPeriod);
 139 }
 140
 141 static void _dump_DIRAMPFORCE(LPDIRAMPFORCE frc)
 142 {
 143     TRACE("Ramp force has start %ld, end %ld\n",
 144           frc->lStart, frc->lEnd);
 145 }
 146
 147 static void _dump_DICONDITION(LPDICONDITION frc)
 148 {
 149     TRACE("Condition has offset %ld, pos/neg coefficients %ld and %ld, pos/neg saturations %ld and %ld, deadband %ld\n",
 150           frc->lOffset, frc->lPositiveCoefficient, frc->lNegativeCoefficient,
 151           frc->dwPositiveSaturation, frc->dwNegativeSaturation, frc->lDeadBand);
 152 }
 153
 154 static void _dump_DICUSTOMFORCE(LPDICUSTOMFORCE frc)
 155 {
 156     unsigned int i;
 157     TRACE("Custom force uses %ld channels, sample period %ld.  Has %ld samples at %p.\n",
 158           frc->cChannels, frc->dwSamplePeriod, frc->cSamples, frc->rglForceData);
 159     if (frc->cSamples % frc->cChannels != 0)
 160         WARN("Custom force has a non-integral samples-per-channel count!\n");
 161     if (TRACE_ON(dinput)) {
 162         DPRINTF("Custom force data (time aligned, axes in order):\n");
 163         for (i = 1; i <= frc->cSamples; ++i) {
 164             DPRINTF("%ld ", frc->rglForceData[i]);
 165             if (i % frc->cChannels == 0)
 166                 DPRINTF("\n");
 167         }
 168     }
 169 }
 170
 171 static void _dump_DIEFFECT(LPCDIEFFECT eff, REFGUID guid)
 172 {
 173     unsigned int i;
 174     DWORD type = _typeFromGUID(guid);
 175
 176     TRACE("Dumping DIEFFECT structure:\n");
 177     TRACE("  - dwSize: %ld\n", eff->dwSize);
 178     if ((eff->dwSize != sizeof(DIEFFECT)) && (eff->dwSize != sizeof(DIEFFECT_DX5))) {
 179         WARN("Non-standard DIEFFECT structure size (%ld instead of %d or %d).\n",
 180              eff->dwSize, sizeof(DIEFFECT), sizeof(DIEFFECT_DX5));
 181     }
 182     TRACE("  - dwFlags: %ld\n", eff->dwFlags);
 183     TRACE("    ");
 184     _dump_DIEFFECT_flags(eff->dwFlags);
 185     TRACE("  - dwDuration: %ld\n", eff->dwDuration);
 186     TRACE("  - dwGain: %ld\n", eff->dwGain);
 187     if ((eff->dwGain > 10000) || (eff->dwGain < 0))
 188         WARN("dwGain is out of range (0 - 10,000)\n");
 189     TRACE("  - dwTriggerButton: %ld\n", eff->dwTriggerButton);
 190     TRACE("  - dwTriggerRepeatInterval: %ld\n", eff->dwTriggerRepeatInterval);
 191     TRACE("  - cAxes: %ld\n", eff->cAxes);
 192     TRACE("  - rgdwAxes: %p\n", eff->rgdwAxes);
 193     if (TRACE_ON(dinput)) {
 194         TRACE("    ");
 195         for (i = 0; i < eff->cAxes; ++i)
 196             DPRINTF("%ld ", eff->rgdwAxes[i]);
 197         DPRINTF("\n");
 198     }
 199     TRACE("  - rglDirection: %p\n", eff->rglDirection);
 200     TRACE("  - lpEnvelope: %p\n", eff->lpEnvelope);
 201     TRACE("  - cbTypeSpecificParams: %ld\n", eff->cbTypeSpecificParams);
 202     TRACE("  - lpvTypeSpecificParams: %p\n", eff->lpvTypeSpecificParams);
 203     if (eff->dwSize > sizeof(DIEFFECT_DX5))
 204         TRACE("  - dwStartDelay: %ld\n", eff->dwStartDelay);
 205     if (eff->lpEnvelope != NULL)
 206         _dump_DIENVELOPE(eff->lpEnvelope);
 207     if (type == DIEFT_CONSTANTFORCE) {
 208         if (eff->cbTypeSpecificParams != sizeof(DICONSTANTFORCE)) {
 209             WARN("Effect claims to be a constant force but the type-specific params are the wrong size!\n");
 210         } else {
 211             _dump_DICONSTANTFORCE(eff->lpvTypeSpecificParams);
 212         }
 213     } else if (type == DIEFT_PERIODIC) {
 214         if (eff->cbTypeSpecificParams != sizeof(DIPERIODIC)) {
 215             WARN("Effect claims to be a periodic force but the type-specific params are the wrong size!\n");
 216         } else {
 217             _dump_DIPERIODIC(eff->lpvTypeSpecificParams);
 218         }
 219     } else if (type == DIEFT_RAMPFORCE) {
 220         if (eff->cbTypeSpecificParams != sizeof(DIRAMPFORCE)) {
 221             WARN("Effect claims to be a ramp force but the type-specific params are the wrong size!\n");
 222         } else {
 223             _dump_DIRAMPFORCE(eff->lpvTypeSpecificParams);
 224         }
 225     } else if (type == DIEFT_CONDITION) {
 226         if (eff->cbTypeSpecificParams != sizeof(DICONDITION)) {
 227             WARN("Effect claims to be a condition but the type-specific params are the wrong size!\n");
 228         } else {
 229             _dump_DICONDITION(eff->lpvTypeSpecificParams);
 230         }
 231     } else if (type == DIEFT_CUSTOMFORCE) {
 232         if (eff->cbTypeSpecificParams != sizeof(DICUSTOMFORCE)) {
 233             WARN("Effect claims to be a custom force but the type-specific params are the wrong size!\n");
 234         } else {
 235             _dump_DICUSTOMFORCE(eff->lpvTypeSpecificParams);
 236         }
 237     }
 238 }
 239
 240
 241 /******************************************************************************
 242  *      LinuxInputEffectImpl
 243  */
 244
 245 static ULONG WINAPI LinuxInputEffectImpl_AddRef(
 246         LPDIRECTINPUTEFFECT iface)
 247 {
 248     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 249     return InterlockedIncrement(&(This->ref));
 250 }
 251
 252 static HRESULT WINAPI LinuxInputEffectImpl_Download(
 253         LPDIRECTINPUTEFFECT iface)
 254 {
 255     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 256
 257     TRACE("(this=%p)\n", This);
 258
 259     if (ioctl(*(This->fd), EVIOCSFF, &This->effect) == -1) {
 260         if (errno == ENOMEM) {
 261             return DIERR_DEVICEFULL;
 262         } else {
 263             FIXME("Could not upload effect. Assuming a disconnected device.\n");
 264             return DIERR_INPUTLOST;
 265         }
 266     }
 267
 268     return DI_OK;
 269 }
 270
 271 static HRESULT WINAPI LinuxInputEffectImpl_Escape(
 272         LPDIRECTINPUTEFFECT iface,
 273         LPDIEFFESCAPE pesc)
 274 {
 275     WARN("(this=%p,%p): invalid: no hardware-specific escape codes in this"
 276          " driver!\n", iface, pesc);
 277
 278     return DI_OK;
 279 }
 280
 281 static HRESULT WINAPI LinuxInputEffectImpl_GetEffectGuid(
 282         LPDIRECTINPUTEFFECT iface,
 283         LPGUID pguid)
 284 {
 285     LinuxInputEffectImpl *This = (LinuxInputEffectImpl*)iface;
 286
 287     TRACE("(this=%p,%p)\n", This, pguid);
 288
 289     pguid = &This->guid;
 290
 291     return DI_OK;
 292 }
 293
 294 static HRESULT WINAPI LinuxInputEffectImpl_GetEffectStatus(
 295         LPDIRECTINPUTEFFECT iface,
 296         LPDWORD pdwFlags)
 297 {
 298     TRACE("(this=%p,%p)\n", iface, pdwFlags);
 299
 300     /* linux sends the effect status through an event.
 301      * that event is trapped by our parent joystick driver
 302      * and there is no clean way to pass it back to us. */
 303     FIXME("Not enough information to provide a status.\n");
 304
 305     (*pdwFlags) = 0;
 306
 307     return DI_OK;
 308 }
 309
 310 static HRESULT WINAPI LinuxInputEffectImpl_GetParameters(
 311         LPDIRECTINPUTEFFECT iface,
 312         LPDIEFFECT peff,
 313         DWORD dwFlags)
 314 {
 315     HRESULT diErr = DI_OK;
 316     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 317     TRACE("(this=%p,%p,%ld)\n", This, peff, dwFlags);
 318
 319     /* Major conversion factors are:
 320      * times: millisecond (linux) -> microsecond (windows) (x * 1000)
 321      * forces: scale 0x7FFF (linux) -> scale 10000 (windows) approx ((x / 33) * 10)
 322      * angles: scale 0x7FFF (linux) -> scale 35999 (windows) approx ((x / 33) * 36)
 323      * angle bases: 0 -> -y (down) (linux) -> 0 -> +x (right) (windows)
 324      */
 325
 326     if (dwFlags & DIEP_AXES) {
 327         if (peff->cAxes < 2 /* linuxinput effects always use 2 axes, x and y */)
 328             diErr = DIERR_MOREDATA;
 329         peff->cAxes = 2;
 330         if (diErr)
 331             return diErr;
 332         else {
 333             peff->rgdwAxes[0] = DIJOFS_X;
 334             peff->rgdwAxes[1] = DIJOFS_Y;
 335         }
 336     }
 337
 338     if (dwFlags & DIEP_DIRECTION) {
 339         if (peff->cAxes < 2)
 340             diErr = DIERR_MOREDATA;
 341         peff->cAxes = 2;
 342         if (diErr)
 343             return diErr;
 344         else {
 345             if (peff->dwFlags & DIEFF_CARTESIAN) {
 346                 peff->rglDirection[0] = (long)(sin(M_PI * 3 * This->effect.direction / 0x7FFF) * 1000);
 347                 peff->rglDirection[1] = (long)(cos(M_PI * 3 * This->effect.direction / 0x7FFF) * 1000);
 348             } else {
 349                 /* Polar and spherical coordinates are the same for two or less
 350                  * axes.
 351                  * Note that we also use this case if NO flags are marked.
 352                  * According to MSDN, we should return the direction in the
 353                  * format that it was specified in, if no flags are marked.
 354                  */
 355                 peff->rglDirection[0] = (This->effect.direction / 33) * 36 + 9000;
 356                 if (peff->rglDirection[0] > 35999)
 357                     peff->rglDirection[0] -= 35999;
 358             }
 359         }
 360     }
 361
 362     if (dwFlags & DIEP_DURATION) {
 363         peff->dwDuration = (DWORD)This->effect.replay.length * 1000;
 364     }
 365
 366     if (dwFlags & DIEP_ENVELOPE) {
 367         struct ff_envelope* env;
 368         if (This->effect.type == FF_CONSTANT) env = &This->effect.u.constant.envelope;
 369         else if (This->effect.type == FF_PERIODIC) env = &This->effect.u.periodic.envelope;
 370         else if (This->effect.type == FF_RAMP) env = &This->effect.u.ramp.envelope;
 371         else env = NULL;
 372         if (env == NULL) {
 373             peff->lpEnvelope = NULL;
 374         } else if (peff->lpEnvelope == NULL) {
 375             return DIERR_INVALIDPARAM;
 376         } else {
 377             peff->lpEnvelope->dwAttackLevel = (env->attack_level / 33) * 10;
 378             peff->lpEnvelope->dwAttackTime = env->attack_length * 1000;
 379             peff->lpEnvelope->dwFadeLevel = (env->fade_level / 33) * 10;
 380             peff->lpEnvelope->dwFadeTime = env->fade_length * 1000;
 381         }
 382     }
 383
 384     if (dwFlags & DIEP_GAIN) {
 385         /* the linux input ff driver apparently has no support
 386          * for setting the device's gain. */
 387         peff->dwGain = DI_FFNOMINALMAX;
 388     }
 389
 390     if (dwFlags & DIEP_SAMPLEPERIOD) {
 391         /* the linux input ff driver has no support for setting
 392          * the playback sample period.  0 means default. */
 393         peff->dwSamplePeriod = 0;
 394     }
 395
 396     if (dwFlags & DIEP_STARTDELAY) {
 397         peff->dwStartDelay = This->effect.replay.delay * 1000;
 398     }
 399
 400     if (dwFlags & DIEP_TRIGGERBUTTON) {
 401         FIXME("LinuxInput button mapping needs redoing; for now, assuming we're using an actual joystick.\n");
 402         peff->dwTriggerButton = DIJOFS_BUTTON(This->effect.trigger.button - BTN_JOYSTICK);
 403     }
 404
 405     if (dwFlags & DIEP_TRIGGERREPEATINTERVAL) {
 406         peff->dwTriggerRepeatInterval = This->effect.trigger.interval * 1000;
 407     }
 408
 409     if (dwFlags & DIEP_TYPESPECIFICPARAMS) {
 410         int expectedsize = 0;
 411         if (This->effect.type == FF_PERIODIC) {
 412             expectedsize = sizeof(DIPERIODIC);
 413         } else if (This->effect.type == FF_CONSTANT) {
 414             expectedsize = sizeof(DICONSTANTFORCE);
 415         } else if (This->effect.type == FF_SPRING
 416                 || This->effect.type == FF_FRICTION
 417                 || This->effect.type == FF_INERTIA
 418                 || This->effect.type == FF_DAMPER) {
 419             expectedsize = sizeof(DICONDITION) * 2;
 420         } else if (This->effect.type == FF_RAMP) {
 421             expectedsize = sizeof(DIRAMPFORCE);
 422         }
 423         if (expectedsize > peff->cbTypeSpecificParams)
 424             diErr = DIERR_MOREDATA;
 425         peff->cbTypeSpecificParams = expectedsize;
 426         if (diErr)
 427             return diErr;
 428         else {
 429             if (This->effect.type == FF_PERIODIC) {
 430                 LPDIPERIODIC tsp = (LPDIPERIODIC)(peff->lpvTypeSpecificParams);
 431                 tsp->dwMagnitude = (This->effect.u.periodic.magnitude / 33) * 10;
 432                 tsp->lOffset = (This->effect.u.periodic.offset / 33) * 10;
 433                 tsp->dwPhase = (This->effect.u.periodic.phase / 33) * 36;
 434                 tsp->dwPeriod = (This->effect.u.periodic.period * 1000);
 435             } else if (This->effect.type == FF_CONSTANT) {
 436                 LPDICONSTANTFORCE tsp = (LPDICONSTANTFORCE)(peff->lpvTypeSpecificParams);
 437                 tsp->lMagnitude = (This->effect.u.constant.level / 33) * 10;
 438             } else if (This->effect.type == FF_SPRING
 439                     || This->effect.type == FF_FRICTION
 440                     || This->effect.type == FF_INERTIA
 441                     || This->effect.type == FF_DAMPER) {
 442                 LPDICONDITION tsp = (LPDICONDITION)(peff->lpvTypeSpecificParams);
 443                 int i;
 444                 for (i = 0; i < 2; ++i) {
 445                     tsp[i].lOffset = (This->effect.u.condition[i].center / 33) * 10;
 446                     tsp[i].lPositiveCoefficient = (This->effect.u.condition[i].right_coeff / 33) * 10;
 447                     tsp[i].lNegativeCoefficient = (This->effect.u.condition[i].left_coeff / 33) * 10;
 448                     tsp[i].dwPositiveSaturation = (This->effect.u.condition[i].right_saturation / 33) * 10;
 449                     tsp[i].dwNegativeSaturation = (This->effect.u.condition[i].left_saturation / 33) * 10;
 450                     tsp[i].lDeadBand = (This->effect.u.condition[i].deadband / 33) * 10;
 451                 }
 452             } else if (This->effect.type == FF_RAMP) {
 453                 LPDIRAMPFORCE tsp = (LPDIRAMPFORCE)(peff->lpvTypeSpecificParams);
 454                 tsp->lStart = (This->effect.u.ramp.start_level / 33) * 10;
 455                 tsp->lEnd = (This->effect.u.ramp.end_level / 33) * 10;
 456             }
 457         }
 458     }
 459
 460     return diErr;
 461 }
 462
 463 static HRESULT WINAPI LinuxInputEffectImpl_Initialize(
 464         LPDIRECTINPUTEFFECT iface,
 465         HINSTANCE hinst,
 466         DWORD dwVersion,
 467         REFGUID rguid)
 468 {
 469     FIXME("(this=%p,%p,%ld,%s): stub!\n",
 470          iface, hinst, dwVersion, debugstr_guid(rguid));
 471
 472     return DI_OK;
 473 }
 474
 475 static HRESULT WINAPI LinuxInputEffectImpl_QueryInterface(
 476         LPDIRECTINPUTEFFECT iface,
 477         REFIID riid,
 478         void **ppvObject)
 479 {
 480     LinuxInputEffectImpl* This = (LinuxInputEffectImpl*)iface;
 481
 482     TRACE("(this=%p,%s,%p)\n", This, debugstr_guid(riid), ppvObject);
 483
 484     if (IsEqualGUID(&IID_IUnknown, riid) ||
 485         IsEqualGUID(&IID_IDirectInputEffect, riid)) {
 486             LinuxInputEffectImpl_AddRef(iface);
 487             *ppvObject = This;
 488             return 0;
 489     }
 490
 491     TRACE("Unsupported interface!\n");
 492     return E_FAIL;
 493 }
 494
 495 static HRESULT WINAPI LinuxInputEffectImpl_Start(
 496         LPDIRECTINPUTEFFECT iface,
 497         DWORD dwIterations,
 498         DWORD dwFlags)
 499 {
 500     struct input_event event;
 501     LinuxInputEffectImpl* This = (LinuxInputEffectImpl*)iface;
 502
 503     TRACE("(this=%p,%ld,%ld)\n", This, dwIterations, dwFlags);
 504
 505     if (!(dwFlags & DIES_NODOWNLOAD)) {
 506         /* Download the effect if necessary */
 507         if (This->effect.id == -1) {
 508             HRESULT res = LinuxInputEffectImpl_Download(iface);
 509             if (res != DI_OK)
 510                 return res;
 511         }
 512     }
 513
 514     if (dwFlags & DIES_SOLO) {
 515         FIXME("Solo mode requested: should be stopping all effects here!\n");
 516     }
 517
 518     event.type = EV_FF;
 519     event.code = This->effect.id;
 520     event.value = dwIterations;
 521     if (write(*(This->fd), &event, sizeof(event)) == -1) {
 522         FIXME("Unable to write event.  Assuming device disconnected.\n");
 523         return DIERR_INPUTLOST;
 524     }
 525
 526     return DI_OK;
 527 }
 528
 529 static HRESULT WINAPI LinuxInputEffectImpl_SetParameters(
 530         LPDIRECTINPUTEFFECT iface,
 531         LPCDIEFFECT peff,
 532         DWORD dwFlags)
 533 {
 534     LinuxInputEffectImpl* This = (LinuxInputEffectImpl*)iface;
 535     DWORD type = _typeFromGUID(&This->guid);
 536     HRESULT retval = DI_OK;
 537
 538     TRACE("(this=%p,%p,%ld)\n", This, peff, dwFlags);
 539
 540     _dump_DIEFFECT(peff, &This->guid);
 541
 542     if ((dwFlags & !DIEP_NORESTART & !DIEP_NODOWNLOAD & !DIEP_START) == 0) {
 543         /* set everything */
 544         dwFlags = DIEP_AXES | DIEP_DIRECTION | DIEP_DURATION | DIEP_ENVELOPE |
 545             DIEP_GAIN | DIEP_SAMPLEPERIOD | DIEP_STARTDELAY | DIEP_TRIGGERBUTTON |
 546             DIEP_TRIGGERREPEATINTERVAL | DIEP_TYPESPECIFICPARAMS;
 547     }
 548
 549     if (dwFlags & DIEP_AXES) {
 550         /* the linux input effect system only supports one or two axes */
 551         if (peff->cAxes > 2)
 552             return DIERR_INVALIDPARAM;
 553         else if (peff->cAxes < 1)
 554             return DIERR_INCOMPLETEEFFECT;
 555     }
 556
 557     /* some of this may look funky, but it's 'cause the linux driver and directx have
 558      * different opinions about which way direction "0" is.  directx has 0 along the x
 559      * axis (left), linux has it along the y axis (down). */
 560     if (dwFlags & DIEP_DIRECTION) {
 561         if (peff->cAxes == 1) {
 562             if (peff->dwFlags & DIEFF_CARTESIAN) {
 563                 if (dwFlags & DIEP_AXES) {
 564                     if (peff->rgdwAxes[0] == DIJOFS_X && peff->rglDirection[0] >= 0)
 565                         This->effect.direction = 0x4000;
 566                     else if (peff->rgdwAxes[0] == DIJOFS_X && peff->rglDirection[0] < 0)
 567                         This->effect.direction = 0xC000;
 568                     else if (peff->rgdwAxes[0] == DIJOFS_Y && peff->rglDirection[0] >= 0)
 569                         This->effect.direction = 0;
 570                     else if (peff->rgdwAxes[0] == DIJOFS_Y && peff->rglDirection[0] < 0)
 571                         This->effect.direction = 0x8000;
 572                 }
 573             } else {
 574                 /* one-axis effects must use cartesian coords */
 575                 return DIERR_INVALIDPARAM;
 576             }
 577         } else { /* two axes */
 578             if (peff->dwFlags & DIEFF_CARTESIAN) {
 579                 /* avoid divide-by-zero */
 580                 if (peff->rglDirection[1] == 0) {
 581                     if (peff->rglDirection[0] >= 0)
 582                         This->effect.direction = 0x4000;
 583                     else if (peff->rglDirection[0] < 0)
 584                         This->effect.direction = 0xC000;
 585                 } else {
 586                     This->effect.direction = (int)(atan(peff->rglDirection[0] / peff->rglDirection[1]) * 0x7FFF / (3 * M_PI));
 587                 }
 588             } else {
 589                 /* Polar and spherical are the same for 2 axes */
 590                 /* Precision is important here, so we do double math with exact constants */
 591                 This->effect.direction = (int)(((double)peff->rglDirection[0] - 90) / 35999) * 0x7FFF;
 592             }
 593         }
 594     }
 595
 596     if (dwFlags & DIEP_DURATION)
 597         This->effect.replay.length = peff->dwDuration / 1000;
 598
 599     if (dwFlags & DIEP_ENVELOPE) {
 600         struct ff_envelope* env;
 601         if (This->effect.type == FF_CONSTANT) env = &This->effect.u.constant.envelope;
 602         else if (This->effect.type == FF_PERIODIC) env = &This->effect.u.periodic.envelope;
 603         else if (This->effect.type == FF_RAMP) env = &This->effect.u.ramp.envelope;
 604         else env = NULL;
 605
 606         if (peff->lpEnvelope == NULL) {
 607             /* if this type had an envelope, reset it
 608              * note that length can never be zero, so we set it to something miniscule */
 609             if (env) {
 610                 env->attack_length = 0x10;
 611                 env->attack_level = 0x7FFF;
 612                 env->fade_length = 0x10;
 613                 env->fade_level = 0x7FFF;
 614             }
 615         } else {
 616             /* did we get passed an envelope for a type that doesn't even have one? */
 617             if (!env) return DIERR_INVALIDPARAM;
 618             /* copy the envelope */
 619             env->attack_length = peff->lpEnvelope->dwAttackTime / 1000;
 620             env->attack_level = (peff->lpEnvelope->dwAttackLevel / 10) * 32;
 621             env->fade_length = peff->lpEnvelope->dwFadeTime / 1000;
 622             env->fade_level = (peff->lpEnvelope->dwFadeLevel / 10) * 32;
 623         }
 624     }
 625
 626     /* Gain and Sample Period settings are not supported by the linux
 627      * event system */
 628     if (dwFlags & DIEP_GAIN)
 629         TRACE("Gain requested but no gain functionality present.\n");
 630
 631     if (dwFlags & DIEP_SAMPLEPERIOD)
 632         TRACE("Sample period requested but no sample period functionality present.\n");
 633
 634     if (dwFlags & DIEP_STARTDELAY)
 635         This->effect.replay.delay = peff->dwStartDelay / 1000;
 636
 637     if (dwFlags & DIEP_TRIGGERBUTTON) {
 638         if (peff->dwTriggerButton != -1) {
 639             FIXME("Linuxinput button mapping needs redoing, assuming we're using a joystick.\n");
 640             FIXME("Trigger button translation not yet implemented!\n");
 641         }
 642         This->effect.trigger.button = 0;
 643     }
 644
 645     if (dwFlags & DIEP_TRIGGERREPEATINTERVAL)
 646         This->effect.trigger.interval = peff->dwTriggerRepeatInterval / 1000;
 647
 648     if (dwFlags & DIEP_TYPESPECIFICPARAMS) {
 649         if (!(peff->lpvTypeSpecificParams))
 650             return DIERR_INCOMPLETEEFFECT;
 651         if (type == DIEFT_PERIODIC) {
 652             LPCDIPERIODIC tsp;
 653             if (peff->cbTypeSpecificParams != sizeof(DIPERIODIC))
 654                 return DIERR_INVALIDPARAM;
 655             tsp = (LPCDIPERIODIC)(peff->lpvTypeSpecificParams);
 656             This->effect.u.periodic.magnitude = (tsp->dwMagnitude / 10) * 32;
 657             This->effect.u.periodic.offset = (tsp->lOffset / 10) * 32;
 658             This->effect.u.periodic.phase = (tsp->dwPhase / 9) * 8; /* == (/ 36 * 32) */
 659             This->effect.u.periodic.period = tsp->dwPeriod / 1000;
 660         } else if (type == DIEFT_CONSTANTFORCE) {
 661             LPCDICONSTANTFORCE tsp;
 662             if (peff->cbTypeSpecificParams != sizeof(DICONSTANTFORCE))
 663                 return DIERR_INVALIDPARAM;
 664             tsp = (LPCDICONSTANTFORCE)(peff->lpvTypeSpecificParams);
 665             This->effect.u.constant.level = (tsp->lMagnitude / 10) * 32;
 666         } else if (type == DIEFT_RAMPFORCE) {
 667             LPCDIRAMPFORCE tsp;
 668             if (peff->cbTypeSpecificParams != sizeof(DIRAMPFORCE))
 669                 return DIERR_INVALIDPARAM;
 670             tsp = (LPCDIRAMPFORCE)(peff->lpvTypeSpecificParams);
 671             This->effect.u.ramp.start_level = (tsp->lStart / 10) * 32;
 672             This->effect.u.ramp.end_level = (tsp->lStart / 10) * 32;
 673         } else if (type == DIEFT_CONDITION) {
 674             LPCDICONDITION tsp = (LPCDICONDITION)(peff->lpvTypeSpecificParams);
 675             if (peff->cbTypeSpecificParams == sizeof(DICONDITION)) {
 676                 /* One condition block.  This needs to be rotated to direction,
 677                  * and expanded to separate x and y conditions. */
 678                 int i;
 679                 double factor[2];
 680                 factor[0] = asin((This->effect.direction * 3.0 * M_PI) / 0x7FFF);
 681                 factor[1] = acos((This->effect.direction * 3.0 * M_PI) / 0x7FFF);
 682                 for (i = 0; i < 2; ++i) {
 683                     This->effect.u.condition[i].center = (int)(factor[i] * (tsp->lOffset / 10) * 32);
 684                     This->effect.u.condition[i].right_coeff = (int)(factor[i] * (tsp->lPositiveCoefficient / 10) * 32);
 685                     This->effect.u.condition[i].left_coeff = (int)(factor[i] * (tsp->lNegativeCoefficient / 10) * 32);
 686                     This->effect.u.condition[i].right_saturation = (int)(factor[i] * (tsp->dwPositiveSaturation / 10) * 32);
 687                     This->effect.u.condition[i].left_saturation = (int)(factor[i] * (tsp->dwNegativeSaturation / 10) * 32);
 688                     This->effect.u.condition[i].deadband = (int)(factor[i] * (tsp->lDeadBand / 10) * 32);
 689                 }
 690             } else if (peff->cbTypeSpecificParams == 2 * sizeof(DICONDITION)) {
 691                 /* Two condition blocks.  Direct parameter copy. */
 692                 int i;
 693                 for (i = 0; i < 2; ++i) {
 694                     This->effect.u.condition[i].center = (tsp[i].lOffset / 10) * 32;
 695                     This->effect.u.condition[i].right_coeff = (tsp[i].lPositiveCoefficient / 10) * 32;
 696                     This->effect.u.condition[i].left_coeff = (tsp[i].lNegativeCoefficient / 10) * 32;
 697                     This->effect.u.condition[i].right_saturation = (tsp[i].dwPositiveSaturation / 10) * 32;
 698                     This->effect.u.condition[i].left_saturation = (tsp[i].dwNegativeSaturation / 10) * 32;
 699                     This->effect.u.condition[i].deadband = (tsp[i].lDeadBand / 10) * 32;
 700                 }
 701             } else {
 702                 return DIERR_INVALIDPARAM;
 703             }
 704         } else {
 705             FIXME("Custom force types are not supported\n");
 706             return DIERR_INVALIDPARAM;
 707         }
 708     }
 709
 710     if (!(dwFlags & DIEP_NODOWNLOAD))
 711         retval = LinuxInputEffectImpl_Download(iface);
 712     if (retval != DI_OK)
 713         return DI_DOWNLOADSKIPPED;
 714
 715     if (dwFlags & DIEP_NORESTART)
 716         TRACE("DIEP_NORESTART: not handled (we have no control of that).\n");
 717
 718     if (dwFlags & DIEP_START)
 719         retval = LinuxInputEffectImpl_Start(iface, 1, 0);
 720     if (retval != DI_OK)
 721         return retval;
 722
 723     return DI_OK;
 724 }
 725
 726 static ULONG WINAPI LinuxInputEffectImpl_Release(
 727         LPDIRECTINPUTEFFECT iface)
 728 {
 729     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 730     ULONG ref = InterlockedDecrement(&(This->ref));
 731
 732     if (ref == 0)
 733         HeapFree(GetProcessHeap(), 0, This);
 734     return ref;
 735 }
 736
 737 static HRESULT WINAPI LinuxInputEffectImpl_Stop(
 738         LPDIRECTINPUTEFFECT iface)
 739 {
 740     struct input_event event;
 741     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 742
 743     TRACE("(this=%p)\n", This);
 744
 745     event.type = EV_FF;
 746     event.code = This->effect.id;
 747     event.value = 0;
 748     /* we don't care about the success or failure of this call */
 749     write(*(This->fd), &event, sizeof(event));
 750
 751     return DI_OK;
 752 }
 753
 754 static HRESULT WINAPI LinuxInputEffectImpl_Unload(
 755         LPDIRECTINPUTEFFECT iface)
 756 {
 757     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 758     TRACE("(this=%p)\n", This);
 759
 760     /* Erase the downloaded effect */
 761     if (ioctl(*(This->fd), EVIOCRMFF, This->effect.id) == -1)
 762         return DIERR_INVALIDPARAM;
 763
 764     /* Mark the effect as deallocated */
 765     This->effect.id = -1;
 766
 767     return DI_OK;
 768 }
 769
 770 /******************************************************************************
 771  *      LinuxInputEffect
 772  */
 773
 774 HRESULT linuxinput_create_effect(
 775         int* fd,
 776         REFGUID rguid,
 777         LPDIRECTINPUTEFFECT* peff)
 778 {
 779     LinuxInputEffectImpl* newEffect = HeapAlloc(GetProcessHeap(),
 780         HEAP_ZERO_MEMORY, sizeof(LinuxInputEffectImpl));
 781     DWORD type = _typeFromGUID(rguid);
 782
 783     newEffect->lpVtbl = &LinuxInputEffectVtbl;
 784     newEffect->ref = 1;
 785     memcpy(&(newEffect->guid), rguid, sizeof(*rguid));
 786     newEffect->fd = fd;
 787
 788     /* set the type.  this cannot be changed over the effect's life. */
 789     switch (type) {
 790         case DIEFT_PERIODIC:
 791             newEffect->effect.type = FF_PERIODIC;
 792             if (IsEqualGUID(rguid, &GUID_Sine)) {
 793                 newEffect->effect.u.periodic.waveform = FF_SINE;
 794             } else if (IsEqualGUID(rguid, &GUID_Triangle)) {
 795                 newEffect->effect.u.periodic.waveform = FF_TRIANGLE;
 796             } else if (IsEqualGUID(rguid, &GUID_Square)) {
 797                 newEffect->effect.u.periodic.waveform = FF_SQUARE;
 798             } else if (IsEqualGUID(rguid, &GUID_SawtoothUp)) {
 799                 newEffect->effect.u.periodic.waveform = FF_SAW_UP;
 800             } else if (IsEqualGUID(rguid, &GUID_SawtoothDown)) {
 801                 newEffect->effect.u.periodic.waveform = FF_SAW_DOWN;
 802             }
 803             break;
 804         case DIEFT_CONSTANTFORCE:
 805             newEffect->effect.type = FF_CONSTANT;
 806             break;
 807         case DIEFT_RAMPFORCE:
 808             newEffect->effect.type = FF_RAMP;
 809             break;
 810         case DIEFT_CONDITION:
 811             if (IsEqualGUID(rguid, &GUID_Spring)) {
 812                 newEffect->effect.type = FF_SPRING;
 813             } else if (IsEqualGUID(rguid, &GUID_Friction)) {
 814                 newEffect->effect.type = FF_FRICTION;
 815             } else if (IsEqualGUID(rguid, &GUID_Inertia)) {
 816                 newEffect->effect.type = FF_INERTIA;
 817             } else if (IsEqualGUID(rguid, &GUID_Damper)) {
 818                 newEffect->effect.type = FF_DAMPER;
 819             }
 820             break;
 821         case DIEFT_CUSTOMFORCE:
 822             FIXME("Custom forces are not supported.\n");
 823             HeapFree(GetProcessHeap(), 0, newEffect);
 824             return DIERR_INVALIDPARAM;
 825         default:
 826             FIXME("Unknown force type.\n");
 827             HeapFree(GetProcessHeap(), 0, newEffect);
 828             return DIERR_INVALIDPARAM;
 829     }
 830
 831     /* mark as non-uploaded */
 832     newEffect->effect.id = -1;
 833
 834     *peff = (LPDIRECTINPUTEFFECT)newEffect;
 835
 836     TRACE("Creating linux input system effect (%p) with guid %s\n",
 837           *peff, _dump_dinput_GUID(rguid));
 838
 839     return DI_OK;
 840 }
 841
 842 HRESULT linuxinput_get_info_A(
 843         int fd,
 844         REFGUID rguid,
 845         LPDIEFFECTINFOA info)
 846 {
 847     DWORD type = _typeFromGUID(rguid);
 848
 849     TRACE("(%d, %s, %p) type=%ld\n", fd, _dump_dinput_GUID(rguid), info, type);
 850
 851     if (!info) return E_POINTER;
 852
 853     if (info->dwSize != sizeof(DIEFFECTINFOA)) return DIERR_INVALIDPARAM;
 854
 855     info->guid = *rguid;
 856
 857     info->dwEffType = type;
 858     /* the event device API does not support querying for all these things
 859      * therefore we assume that we have support for them
 860      * that's not as dangerous as it sounds, since drivers are allowed to
 861      * ignore parameters they claim to support anyway */
 862     info->dwEffType |= DIEFT_DEADBAND | DIEFT_FFATTACK | DIEFT_FFFADE
 863                     | DIEFT_POSNEGCOEFFICIENTS | DIEFT_POSNEGSATURATION
 864                     | DIEFT_SATURATION | DIEFT_STARTDELAY;
 865
 866     /* again, assume we have support for everything */
 867     info->dwStaticParams = DIEP_ALLPARAMS;
 868     info->dwDynamicParams = info->dwStaticParams;
 869
 870     /* yes, this is windows behavior (print the GUID_Name for name) */
 871     strcpy((char*)&(info->tszName), _dump_dinput_GUID(rguid));
 872
 873     return DI_OK;
 874 }
 875
 876 HRESULT linuxinput_get_info_W(
 877         int fd,
 878         REFGUID rguid,
 879         LPDIEFFECTINFOW info)
 880 {
 881     DWORD type = _typeFromGUID(rguid);
 882
 883     TRACE("(%d, %s, %p) type=%ld\n", fd, _dump_dinput_GUID(rguid), info, type);
 884
 885     if (!info) return E_POINTER;
 886
 887     if (info->dwSize != sizeof(DIEFFECTINFOW)) return DIERR_INVALIDPARAM;
 888
 889     info->guid = *rguid;
 890
 891     info->dwEffType = type;
 892     /* the event device API does not support querying for all these things
 893      * therefore we assume that we have support for them
 894      * that's not as dangerous as it sounds, since drivers are allowed to
 895      * ignore parameters they claim to support anyway */
 896     info->dwEffType |= DIEFT_DEADBAND | DIEFT_FFATTACK | DIEFT_FFFADE
 897                     | DIEFT_POSNEGCOEFFICIENTS | DIEFT_POSNEGSATURATION
 898                     | DIEFT_SATURATION | DIEFT_STARTDELAY;
 899
 900     /* again, assume we have support for everything */
 901     info->dwStaticParams = DIEP_ALLPARAMS;
 902     info->dwDynamicParams = info->dwStaticParams;
 903
 904     /* yes, this is windows behavior (print the GUID_Name for name) */
 905     MultiByteToWideChar(CP_ACP, 0, _dump_dinput_GUID(rguid), -1,
 906                         (WCHAR*)&(info->tszName), MAX_PATH);
 907
 908     return DI_OK;
 909 }
 910
 911 static const IDirectInputEffectVtbl LinuxInputEffectVtbl = {
 912     LinuxInputEffectImpl_QueryInterface,
 913     LinuxInputEffectImpl_AddRef,
 914     LinuxInputEffectImpl_Release,
 915     LinuxInputEffectImpl_Initialize,
 916     LinuxInputEffectImpl_GetEffectGuid,
 917     LinuxInputEffectImpl_GetParameters,
 918     LinuxInputEffectImpl_SetParameters,
 919     LinuxInputEffectImpl_Start,
 920     LinuxInputEffectImpl_Stop,
 921     LinuxInputEffectImpl_GetEffectStatus,
 922     LinuxInputEffectImpl_Download,
 923     LinuxInputEffectImpl_Unload,
 924     LinuxInputEffectImpl_Escape
 925 };
 926
 927 #endif /* HAVE_STRUCT_FF_EFFECT_DIRECTION */