Mercurial > sdl-ios-xcode
annotate src/joystick/SDL_joystick.c @ 1795:398ac0f88e4d
Fixed bug #220
The AltiVec blitters don't compile, since they require __VEC__ to be enabled in
order for the compiler to understand "vector" and friends (i.e. do AltiVec)
But you don't want to turn AltiVec on globally, since then the code would only
run on a G4 (there are already runtime tests, before using the AltiVec
variants)
The solution here is to enable AltiVec locally, for the actual AltiVec code.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 09 May 2006 15:09:47 +0000 |
| parents | 97d0966f4bf7 |
| children | 782fd950bd46 c121d94672cb 6bdec986f2f6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* This is the joystick API for Simple DirectMedia Layer */ | |
| 25 | |
| 26 #include "SDL_events.h" | |
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27 #include "SDL_sysjoystick.h" |
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28 #include "SDL_joystick_c.h" |
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29 #if !SDL_EVENTS_DISABLED |
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30 #include "../events/SDL_events_c.h" |
| 0 | 31 #endif |
| 32 | |
| 33 /* This is used for Quake III Arena */ | |
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34 #if SDL_EVENTS_DISABLED |
| 0 | 35 #define SDL_Lock_EventThread() |
| 36 #define SDL_Unlock_EventThread() | |
| 37 #endif | |
| 38 | |
| 39 Uint8 SDL_numjoysticks = 0; | |
| 40 SDL_Joystick **SDL_joysticks = NULL; | |
| 41 static SDL_Joystick *default_joystick = NULL; | |
| 42 | |
| 43 int SDL_JoystickInit(void) | |
| 44 { | |
| 45 int arraylen; | |
| 46 int status; | |
| 47 | |
| 48 SDL_numjoysticks = 0; | |
| 49 status = SDL_SYS_JoystickInit(); | |
| 50 if ( status >= 0 ) { | |
| 51 arraylen = (status+1)*sizeof(*SDL_joysticks); | |
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52 SDL_joysticks = (SDL_Joystick **)SDL_malloc(arraylen); |
| 0 | 53 if ( SDL_joysticks == NULL ) { |
| 54 SDL_numjoysticks = 0; | |
| 55 } else { | |
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56 SDL_memset(SDL_joysticks, 0, arraylen); |
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57 SDL_numjoysticks = status; |
| 0 | 58 } |
| 59 status = 0; | |
| 60 } | |
| 61 default_joystick = NULL; | |
| 62 return(status); | |
| 63 } | |
| 64 | |
| 65 /* | |
| 66 * Count the number of joysticks attached to the system | |
| 67 */ | |
| 68 int SDL_NumJoysticks(void) | |
| 69 { | |
| 70 return SDL_numjoysticks; | |
| 71 } | |
| 72 | |
| 73 /* | |
| 74 * Get the implementation dependent name of a joystick | |
| 75 */ | |
| 76 const char *SDL_JoystickName(int device_index) | |
| 77 { | |
| 78 if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) { | |
| 79 SDL_SetError("There are %d joysticks available", | |
| 80 SDL_numjoysticks); | |
| 81 return(NULL); | |
| 82 } | |
| 83 return(SDL_SYS_JoystickName(device_index)); | |
| 84 } | |
| 85 | |
| 86 /* | |
| 87 * Open a joystick for use - the index passed as an argument refers to | |
| 88 * the N'th joystick on the system. This index is the value which will | |
| 89 * identify this joystick in future joystick events. | |
| 90 * | |
| 91 * This function returns a joystick identifier, or NULL if an error occurred. | |
| 92 */ | |
| 93 SDL_Joystick *SDL_JoystickOpen(int device_index) | |
| 94 { | |
| 95 int i; | |
| 96 SDL_Joystick *joystick; | |
| 97 | |
| 98 if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) { | |
| 99 SDL_SetError("There are %d joysticks available", | |
| 100 SDL_numjoysticks); | |
| 101 return(NULL); | |
| 102 } | |
| 103 | |
| 104 /* If the joystick is already open, return it */ | |
| 105 for ( i=0; SDL_joysticks[i]; ++i ) { | |
| 106 if ( device_index == SDL_joysticks[i]->index ) { | |
| 107 joystick = SDL_joysticks[i]; | |
| 108 ++joystick->ref_count; | |
| 109 return(joystick); | |
| 110 } | |
| 111 } | |
| 112 | |
| 113 /* Create and initialize the joystick */ | |
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114 joystick = (SDL_Joystick *)SDL_malloc((sizeof *joystick)); |
| 0 | 115 if ( joystick != NULL ) { |
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116 SDL_memset(joystick, 0, (sizeof *joystick)); |
| 0 | 117 joystick->index = device_index; |
| 118 if ( SDL_SYS_JoystickOpen(joystick) < 0 ) { | |
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119 SDL_free(joystick); |
| 0 | 120 joystick = NULL; |
| 121 } else { | |
| 122 if ( joystick->naxes > 0 ) { | |
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123 joystick->axes = (Sint16 *)SDL_malloc |
| 0 | 124 (joystick->naxes*sizeof(Sint16)); |
| 125 } | |
| 126 if ( joystick->nhats > 0 ) { | |
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127 joystick->hats = (Uint8 *)SDL_malloc |
| 0 | 128 (joystick->nhats*sizeof(Uint8)); |
| 129 } | |
| 130 if ( joystick->nballs > 0 ) { | |
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131 joystick->balls = (struct balldelta *)SDL_malloc |
| 0 | 132 (joystick->nballs*sizeof(*joystick->balls)); |
| 133 } | |
| 134 if ( joystick->nbuttons > 0 ) { | |
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135 joystick->buttons = (Uint8 *)SDL_malloc |
| 0 | 136 (joystick->nbuttons*sizeof(Uint8)); |
| 137 } | |
| 138 if ( ((joystick->naxes > 0) && !joystick->axes) | |
| 139 || ((joystick->nhats > 0) && !joystick->hats) | |
| 140 || ((joystick->nballs > 0) && !joystick->balls) | |
| 141 || ((joystick->nbuttons > 0) && !joystick->buttons)) { | |
| 142 SDL_OutOfMemory(); | |
| 143 SDL_JoystickClose(joystick); | |
| 144 joystick = NULL; | |
| 145 } | |
| 146 if ( joystick->axes ) { | |
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147 SDL_memset(joystick->axes, 0, |
| 0 | 148 joystick->naxes*sizeof(Sint16)); |
| 149 } | |
| 150 if ( joystick->hats ) { | |
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151 SDL_memset(joystick->hats, 0, |
| 0 | 152 joystick->nhats*sizeof(Uint8)); |
| 153 } | |
| 154 if ( joystick->balls ) { | |
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155 SDL_memset(joystick->balls, 0, |
| 0 | 156 joystick->nballs*sizeof(*joystick->balls)); |
| 157 } | |
| 158 if ( joystick->buttons ) { | |
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159 SDL_memset(joystick->buttons, 0, |
| 0 | 160 joystick->nbuttons*sizeof(Uint8)); |
| 161 } | |
| 162 } | |
| 163 } | |
| 164 if ( joystick ) { | |
| 165 /* Add joystick to list */ | |
| 166 ++joystick->ref_count; | |
| 167 SDL_Lock_EventThread(); | |
| 168 for ( i=0; SDL_joysticks[i]; ++i ) | |
| 169 /* Skip to next joystick */; | |
| 170 SDL_joysticks[i] = joystick; | |
| 171 SDL_Unlock_EventThread(); | |
| 172 } | |
| 173 return(joystick); | |
| 174 } | |
| 175 | |
| 176 /* | |
| 177 * Returns 1 if the joystick has been opened, or 0 if it has not. | |
| 178 */ | |
| 179 int SDL_JoystickOpened(int device_index) | |
| 180 { | |
| 181 int i, opened; | |
| 182 | |
| 183 opened = 0; | |
| 184 for ( i=0; SDL_joysticks[i]; ++i ) { | |
| 185 if ( SDL_joysticks[i]->index == (Uint8)device_index ) { | |
| 186 opened = 1; | |
| 187 break; | |
| 188 } | |
| 189 } | |
| 190 return(opened); | |
| 191 } | |
| 192 | |
| 193 static int ValidJoystick(SDL_Joystick **joystick) | |
| 194 { | |
| 195 int valid; | |
| 196 | |
| 197 if ( *joystick == NULL ) { | |
| 198 *joystick = default_joystick; | |
| 199 } | |
| 200 if ( *joystick == NULL ) { | |
| 201 SDL_SetError("Joystick hasn't been opened yet"); | |
| 202 valid = 0; | |
| 203 } else { | |
| 204 valid = 1; | |
| 205 } | |
| 206 return valid; | |
| 207 } | |
| 208 | |
| 209 /* | |
| 210 * Get the device index of an opened joystick. | |
| 211 */ | |
| 212 int SDL_JoystickIndex(SDL_Joystick *joystick) | |
| 213 { | |
| 214 if ( ! ValidJoystick(&joystick) ) { | |
| 215 return(-1); | |
| 216 } | |
| 217 return(joystick->index); | |
| 218 } | |
| 219 | |
| 220 /* | |
| 221 * Get the number of multi-dimensional axis controls on a joystick | |
| 222 */ | |
| 223 int SDL_JoystickNumAxes(SDL_Joystick *joystick) | |
| 224 { | |
| 225 if ( ! ValidJoystick(&joystick) ) { | |
| 226 return(-1); | |
| 227 } | |
| 228 return(joystick->naxes); | |
| 229 } | |
| 230 | |
| 231 /* | |
| 232 * Get the number of hats on a joystick | |
| 233 */ | |
| 234 int SDL_JoystickNumHats(SDL_Joystick *joystick) | |
| 235 { | |
| 236 if ( ! ValidJoystick(&joystick) ) { | |
| 237 return(-1); | |
| 238 } | |
| 239 return(joystick->nhats); | |
| 240 } | |
| 241 | |
| 242 /* | |
| 243 * Get the number of trackballs on a joystick | |
| 244 */ | |
| 245 int SDL_JoystickNumBalls(SDL_Joystick *joystick) | |
| 246 { | |
| 247 if ( ! ValidJoystick(&joystick) ) { | |
| 248 return(-1); | |
| 249 } | |
| 250 return(joystick->nballs); | |
| 251 } | |
| 252 | |
| 253 /* | |
| 254 * Get the number of buttons on a joystick | |
| 255 */ | |
| 256 int SDL_JoystickNumButtons(SDL_Joystick *joystick) | |
| 257 { | |
| 258 if ( ! ValidJoystick(&joystick) ) { | |
| 259 return(-1); | |
| 260 } | |
| 261 return(joystick->nbuttons); | |
| 262 } | |
| 263 | |
| 264 /* | |
| 265 * Get the current state of an axis control on a joystick | |
| 266 */ | |
| 267 Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis) | |
| 268 { | |
| 269 Sint16 state; | |
| 270 | |
| 271 if ( ! ValidJoystick(&joystick) ) { | |
| 272 return(0); | |
| 273 } | |
| 274 if ( axis < joystick->naxes ) { | |
| 275 state = joystick->axes[axis]; | |
| 276 } else { | |
| 277 SDL_SetError("Joystick only has %d axes", joystick->naxes); | |
| 278 state = 0; | |
| 279 } | |
| 280 return(state); | |
| 281 } | |
| 282 | |
| 283 /* | |
| 284 * Get the current state of a hat on a joystick | |
| 285 */ | |
| 286 Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat) | |
| 287 { | |
| 288 Uint8 state; | |
| 289 | |
| 290 if ( ! ValidJoystick(&joystick) ) { | |
| 291 return(0); | |
| 292 } | |
| 293 if ( hat < joystick->nhats ) { | |
| 294 state = joystick->hats[hat]; | |
| 295 } else { | |
| 296 SDL_SetError("Joystick only has %d hats", joystick->nhats); | |
| 297 state = 0; | |
| 298 } | |
| 299 return(state); | |
| 300 } | |
| 301 | |
| 302 /* | |
| 303 * Get the ball axis change since the last poll | |
| 304 */ | |
| 305 int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy) | |
| 306 { | |
| 307 int retval; | |
| 308 | |
| 309 if ( ! ValidJoystick(&joystick) ) { | |
| 310 return(-1); | |
| 311 } | |
| 312 | |
| 313 retval = 0; | |
| 314 if ( ball < joystick->nballs ) { | |
| 315 if ( dx ) { | |
| 316 *dx = joystick->balls[ball].dx; | |
| 317 } | |
| 318 if ( dy ) { | |
| 319 *dy = joystick->balls[ball].dy; | |
| 320 } | |
| 321 joystick->balls[ball].dx = 0; | |
| 322 joystick->balls[ball].dy = 0; | |
| 323 } else { | |
| 324 SDL_SetError("Joystick only has %d balls", joystick->nballs); | |
| 325 retval = -1; | |
| 326 } | |
| 327 return(retval); | |
| 328 } | |
| 329 | |
| 330 /* | |
| 331 * Get the current state of a button on a joystick | |
| 332 */ | |
| 333 Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button) | |
| 334 { | |
| 335 Uint8 state; | |
| 336 | |
| 337 if ( ! ValidJoystick(&joystick) ) { | |
| 338 return(0); | |
| 339 } | |
| 340 if ( button < joystick->nbuttons ) { | |
| 341 state = joystick->buttons[button]; | |
| 342 } else { | |
| 343 SDL_SetError("Joystick only has %d buttons",joystick->nbuttons); | |
| 344 state = 0; | |
| 345 } | |
| 346 return(state); | |
| 347 } | |
| 348 | |
| 349 /* | |
| 350 * Close a joystick previously opened with SDL_JoystickOpen() | |
| 351 */ | |
| 352 void SDL_JoystickClose(SDL_Joystick *joystick) | |
| 353 { | |
| 354 int i; | |
| 355 | |
| 356 if ( ! ValidJoystick(&joystick) ) { | |
| 357 return; | |
| 358 } | |
| 359 | |
| 360 /* First decrement ref count */ | |
| 361 if ( --joystick->ref_count > 0 ) { | |
| 362 return; | |
| 363 } | |
| 364 | |
| 365 /* Lock the event queue - prevent joystick polling */ | |
| 366 SDL_Lock_EventThread(); | |
| 367 | |
| 368 if ( joystick == default_joystick ) { | |
| 369 default_joystick = NULL; | |
| 370 } | |
| 371 SDL_SYS_JoystickClose(joystick); | |
| 372 | |
| 373 /* Remove joystick from list */ | |
| 374 for ( i=0; SDL_joysticks[i]; ++i ) { | |
| 375 if ( joystick == SDL_joysticks[i] ) { | |
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376 SDL_memcpy(&SDL_joysticks[i], &SDL_joysticks[i+1], |
| 0 | 377 (SDL_numjoysticks-i)*sizeof(joystick)); |
| 378 break; | |
| 379 } | |
| 380 } | |
| 381 | |
| 382 /* Let the event thread keep running */ | |
| 383 SDL_Unlock_EventThread(); | |
| 384 | |
| 385 /* Free the data associated with this joystick */ | |
| 386 if ( joystick->axes ) { | |
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387 SDL_free(joystick->axes); |
| 0 | 388 } |
| 389 if ( joystick->hats ) { | |
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390 SDL_free(joystick->hats); |
| 0 | 391 } |
| 392 if ( joystick->balls ) { | |
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393 SDL_free(joystick->balls); |
| 0 | 394 } |
| 395 if ( joystick->buttons ) { | |
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396 SDL_free(joystick->buttons); |
| 0 | 397 } |
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398 SDL_free(joystick); |
| 0 | 399 } |
| 400 | |
| 401 void SDL_JoystickQuit(void) | |
| 402 { | |
| 403 /* Stop the event polling */ | |
| 404 SDL_Lock_EventThread(); | |
| 405 SDL_numjoysticks = 0; | |
| 406 SDL_Unlock_EventThread(); | |
| 407 | |
| 408 /* Quit the joystick setup */ | |
| 409 SDL_SYS_JoystickQuit(); | |
| 410 if ( SDL_joysticks ) { | |
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411 SDL_free(SDL_joysticks); |
| 0 | 412 SDL_joysticks = NULL; |
| 413 } | |
| 414 } | |
| 415 | |
| 416 | |
| 417 /* These are global for SDL_sysjoystick.c and SDL_events.c */ | |
| 418 | |
| 419 int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value) | |
| 420 { | |
| 421 int posted; | |
| 422 | |
| 423 /* Update internal joystick state */ | |
| 424 joystick->axes[axis] = value; | |
| 425 | |
| 426 /* Post the event, if desired */ | |
| 427 posted = 0; | |
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428 #if !SDL_EVENTS_DISABLED |
| 0 | 429 if ( SDL_ProcessEvents[SDL_JOYAXISMOTION] == SDL_ENABLE ) { |
| 430 SDL_Event event; | |
| 431 event.type = SDL_JOYAXISMOTION; | |
| 432 event.jaxis.which = joystick->index; | |
| 433 event.jaxis.axis = axis; | |
| 434 event.jaxis.value = value; | |
| 435 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
| 436 posted = 1; | |
| 437 SDL_PushEvent(&event); | |
| 438 } | |
| 439 } | |
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440 #endif /* !SDL_EVENTS_DISABLED */ |
| 0 | 441 return(posted); |
| 442 } | |
| 443 | |
| 444 int SDL_PrivateJoystickHat(SDL_Joystick *joystick, Uint8 hat, Uint8 value) | |
| 445 { | |
| 446 int posted; | |
| 447 | |
| 448 /* Update internal joystick state */ | |
| 449 joystick->hats[hat] = value; | |
| 450 | |
| 451 /* Post the event, if desired */ | |
| 452 posted = 0; | |
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453 #if !SDL_EVENTS_DISABLED |
| 0 | 454 if ( SDL_ProcessEvents[SDL_JOYHATMOTION] == SDL_ENABLE ) { |
| 455 SDL_Event event; | |
| 456 event.jhat.type = SDL_JOYHATMOTION; | |
| 457 event.jhat.which = joystick->index; | |
| 458 event.jhat.hat = hat; | |
| 459 event.jhat.value = value; | |
| 460 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
| 461 posted = 1; | |
| 462 SDL_PushEvent(&event); | |
| 463 } | |
| 464 } | |
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465 #endif /* !SDL_EVENTS_DISABLED */ |
| 0 | 466 return(posted); |
| 467 } | |
| 468 | |
| 469 int SDL_PrivateJoystickBall(SDL_Joystick *joystick, Uint8 ball, | |
| 470 Sint16 xrel, Sint16 yrel) | |
| 471 { | |
| 472 int posted; | |
| 473 | |
| 474 /* Update internal mouse state */ | |
| 475 joystick->balls[ball].dx += xrel; | |
| 476 joystick->balls[ball].dy += yrel; | |
| 477 | |
| 478 /* Post the event, if desired */ | |
| 479 posted = 0; | |
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480 #if !SDL_EVENTS_DISABLED |
| 0 | 481 if ( SDL_ProcessEvents[SDL_JOYBALLMOTION] == SDL_ENABLE ) { |
| 482 SDL_Event event; | |
| 483 event.jball.type = SDL_JOYBALLMOTION; | |
| 484 event.jball.which = joystick->index; | |
| 485 event.jball.ball = ball; | |
| 486 event.jball.xrel = xrel; | |
| 487 event.jball.yrel = yrel; | |
| 488 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
| 489 posted = 1; | |
| 490 SDL_PushEvent(&event); | |
| 491 } | |
| 492 } | |
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493 #endif /* !SDL_EVENTS_DISABLED */ |
| 0 | 494 return(posted); |
| 495 } | |
| 496 | |
| 497 int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state) | |
| 498 { | |
| 499 int posted; | |
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500 #if !SDL_EVENTS_DISABLED |
| 0 | 501 SDL_Event event; |
| 502 | |
| 503 switch ( state ) { | |
| 504 case SDL_PRESSED: | |
| 505 event.type = SDL_JOYBUTTONDOWN; | |
| 506 break; | |
| 507 case SDL_RELEASED: | |
| 508 event.type = SDL_JOYBUTTONUP; | |
| 509 break; | |
| 510 default: | |
| 511 /* Invalid state -- bail */ | |
| 512 return(0); | |
| 513 } | |
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514 #endif /* !SDL_EVENTS_DISABLED */ |
| 0 | 515 |
| 516 /* Update internal joystick state */ | |
| 517 joystick->buttons[button] = state; | |
| 518 | |
| 519 /* Post the event, if desired */ | |
| 520 posted = 0; | |
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521 #if !SDL_EVENTS_DISABLED |
| 0 | 522 if ( SDL_ProcessEvents[event.type] == SDL_ENABLE ) { |
| 523 event.jbutton.which = joystick->index; | |
| 524 event.jbutton.button = button; | |
| 525 event.jbutton.state = state; | |
| 526 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
| 527 posted = 1; | |
| 528 SDL_PushEvent(&event); | |
| 529 } | |
| 530 } | |
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531 #endif /* !SDL_EVENTS_DISABLED */ |
| 0 | 532 return(posted); |
| 533 } | |
| 534 | |
| 535 void SDL_JoystickUpdate(void) | |
| 536 { | |
| 537 int i; | |
| 538 | |
| 539 for ( i=0; SDL_joysticks[i]; ++i ) { | |
| 540 SDL_SYS_JoystickUpdate(SDL_joysticks[i]); | |
| 541 } | |
| 542 } | |
| 543 | |
| 544 int SDL_JoystickEventState(int state) | |
| 545 { | |
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546 #if SDL_EVENTS_DISABLED |
| 0 | 547 return SDL_IGNORE; |
| 548 #else | |
| 549 const Uint8 event_list[] = { | |
| 550 SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYHATMOTION, | |
| 551 SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP, | |
| 552 }; | |
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553 unsigned int i; |
| 0 | 554 |
| 555 switch (state) { | |
| 556 case SDL_QUERY: | |
| 557 state = SDL_IGNORE; | |
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558 for ( i=0; i<SDL_arraysize(event_list); ++i ) { |
| 0 | 559 state = SDL_EventState(event_list[i],SDL_QUERY); |
| 560 if ( state == SDL_ENABLE ) { | |
| 561 break; | |
| 562 } | |
| 563 } | |
| 564 break; | |
| 565 default: | |
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566 for ( i=0; i<SDL_arraysize(event_list); ++i ) { |
| 0 | 567 SDL_EventState(event_list[i], state); |
| 568 } | |
| 569 break; | |
| 570 } | |
| 571 return(state); | |
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572 #endif /* SDL_EVENTS_DISABLED */ |
| 0 | 573 } |