Commit | Line | Data |
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e14743d1 | 1 | /* |
2 | SDL - Simple DirectMedia Layer | |
3 | Copyright (C) 1997-2009 Sam Lantinga | |
4 | ||
5 | This library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
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 | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with this library; if not, write to the Free Software | |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | ||
19 | Sam Lantinga | |
20 | slouken@libsdl.org | |
21 | */ | |
22 | #include "SDL_config.h" | |
23 | ||
24 | /* This is the joystick API for Simple DirectMedia Layer */ | |
25 | ||
26 | #include "SDL_events.h" | |
27 | #include "SDL_sysjoystick.h" | |
28 | #include "SDL_joystick_c.h" | |
29 | #if !SDL_EVENTS_DISABLED | |
30 | #include "../events/SDL_events_c.h" | |
31 | #endif | |
32 | ||
33 | /* This is used for Quake III Arena */ | |
34 | #if SDL_EVENTS_DISABLED | |
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); | |
52 | SDL_joysticks = (SDL_Joystick **)SDL_malloc(arraylen); | |
53 | if ( SDL_joysticks == NULL ) { | |
54 | SDL_numjoysticks = 0; | |
55 | } else { | |
56 | SDL_memset(SDL_joysticks, 0, arraylen); | |
57 | SDL_numjoysticks = status; | |
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 */ | |
114 | joystick = (SDL_Joystick *)SDL_malloc((sizeof *joystick)); | |
115 | if ( !joystick ) { | |
116 | return(NULL); | |
117 | } | |
118 | ||
119 | SDL_memset(joystick, 0, (sizeof *joystick)); | |
120 | joystick->index = device_index; | |
121 | if ( SDL_SYS_JoystickOpen(joystick) < 0 ) { | |
122 | SDL_free(joystick); | |
123 | return(NULL); | |
124 | } | |
125 | ||
126 | if ( joystick->naxes > 0 ) { | |
127 | joystick->axes = (Sint16 *)SDL_malloc | |
128 | (joystick->naxes*sizeof(Sint16)); | |
129 | } | |
130 | if ( joystick->nhats > 0 ) { | |
131 | joystick->hats = (Uint8 *)SDL_malloc | |
132 | (joystick->nhats*sizeof(Uint8)); | |
133 | } | |
134 | if ( joystick->nballs > 0 ) { | |
135 | joystick->balls = (struct balldelta *)SDL_malloc | |
136 | (joystick->nballs*sizeof(*joystick->balls)); | |
137 | } | |
138 | if ( joystick->nbuttons > 0 ) { | |
139 | joystick->buttons = (Uint8 *)SDL_malloc | |
140 | (joystick->nbuttons*sizeof(Uint8)); | |
141 | } | |
142 | if ( ((joystick->naxes > 0) && !joystick->axes) | |
143 | || ((joystick->nhats > 0) && !joystick->hats) | |
144 | || ((joystick->nballs > 0) && !joystick->balls) | |
145 | || ((joystick->nbuttons > 0) && !joystick->buttons)) { | |
146 | SDL_OutOfMemory(); | |
147 | SDL_JoystickClose(joystick); | |
148 | return(NULL); | |
149 | } | |
150 | ||
151 | if ( joystick->axes ) { | |
152 | SDL_memset(joystick->axes, 0, | |
153 | joystick->naxes*sizeof(Sint16)); | |
154 | } | |
155 | if ( joystick->hats ) { | |
156 | SDL_memset(joystick->hats, 0, | |
157 | joystick->nhats*sizeof(Uint8)); | |
158 | } | |
159 | if ( joystick->balls ) { | |
160 | SDL_memset(joystick->balls, 0, | |
161 | joystick->nballs*sizeof(*joystick->balls)); | |
162 | } | |
163 | if ( joystick->buttons ) { | |
164 | SDL_memset(joystick->buttons, 0, | |
165 | joystick->nbuttons*sizeof(Uint8)); | |
166 | } | |
167 | ||
168 | /* Add joystick to list */ | |
169 | ++joystick->ref_count; | |
170 | SDL_Lock_EventThread(); | |
171 | for ( i=0; SDL_joysticks[i]; ++i ) | |
172 | /* Skip to next joystick */ ; | |
173 | SDL_joysticks[i] = joystick; | |
174 | SDL_Unlock_EventThread(); | |
175 | ||
176 | return(joystick); | |
177 | } | |
178 | ||
179 | /* | |
180 | * Returns 1 if the joystick has been opened, or 0 if it has not. | |
181 | */ | |
182 | int SDL_JoystickOpened(int device_index) | |
183 | { | |
184 | int i, opened; | |
185 | ||
186 | opened = 0; | |
187 | for ( i=0; SDL_joysticks[i]; ++i ) { | |
188 | if ( SDL_joysticks[i]->index == (Uint8)device_index ) { | |
189 | opened = 1; | |
190 | break; | |
191 | } | |
192 | } | |
193 | return(opened); | |
194 | } | |
195 | ||
196 | static int ValidJoystick(SDL_Joystick **joystick) | |
197 | { | |
198 | int valid; | |
199 | ||
200 | if ( *joystick == NULL ) { | |
201 | *joystick = default_joystick; | |
202 | } | |
203 | if ( *joystick == NULL ) { | |
204 | SDL_SetError("Joystick hasn't been opened yet"); | |
205 | valid = 0; | |
206 | } else { | |
207 | valid = 1; | |
208 | } | |
209 | return valid; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Get the device index of an opened joystick. | |
214 | */ | |
215 | int SDL_JoystickIndex(SDL_Joystick *joystick) | |
216 | { | |
217 | if ( ! ValidJoystick(&joystick) ) { | |
218 | return(-1); | |
219 | } | |
220 | return(joystick->index); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Get the number of multi-dimensional axis controls on a joystick | |
225 | */ | |
226 | int SDL_JoystickNumAxes(SDL_Joystick *joystick) | |
227 | { | |
228 | if ( ! ValidJoystick(&joystick) ) { | |
229 | return(-1); | |
230 | } | |
231 | return(joystick->naxes); | |
232 | } | |
233 | ||
234 | /* | |
235 | * Get the number of hats on a joystick | |
236 | */ | |
237 | int SDL_JoystickNumHats(SDL_Joystick *joystick) | |
238 | { | |
239 | if ( ! ValidJoystick(&joystick) ) { | |
240 | return(-1); | |
241 | } | |
242 | return(joystick->nhats); | |
243 | } | |
244 | ||
245 | /* | |
246 | * Get the number of trackballs on a joystick | |
247 | */ | |
248 | int SDL_JoystickNumBalls(SDL_Joystick *joystick) | |
249 | { | |
250 | if ( ! ValidJoystick(&joystick) ) { | |
251 | return(-1); | |
252 | } | |
253 | return(joystick->nballs); | |
254 | } | |
255 | ||
256 | /* | |
257 | * Get the number of buttons on a joystick | |
258 | */ | |
259 | int SDL_JoystickNumButtons(SDL_Joystick *joystick) | |
260 | { | |
261 | if ( ! ValidJoystick(&joystick) ) { | |
262 | return(-1); | |
263 | } | |
264 | return(joystick->nbuttons); | |
265 | } | |
266 | ||
267 | /* | |
268 | * Get the current state of an axis control on a joystick | |
269 | */ | |
270 | Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis) | |
271 | { | |
272 | Sint16 state; | |
273 | ||
274 | if ( ! ValidJoystick(&joystick) ) { | |
275 | return(0); | |
276 | } | |
277 | if ( axis < joystick->naxes ) { | |
278 | state = joystick->axes[axis]; | |
279 | } else { | |
280 | SDL_SetError("Joystick only has %d axes", joystick->naxes); | |
281 | state = 0; | |
282 | } | |
283 | return(state); | |
284 | } | |
285 | ||
286 | /* | |
287 | * Get the current state of a hat on a joystick | |
288 | */ | |
289 | Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat) | |
290 | { | |
291 | Uint8 state; | |
292 | ||
293 | if ( ! ValidJoystick(&joystick) ) { | |
294 | return(0); | |
295 | } | |
296 | if ( hat < joystick->nhats ) { | |
297 | state = joystick->hats[hat]; | |
298 | } else { | |
299 | SDL_SetError("Joystick only has %d hats", joystick->nhats); | |
300 | state = 0; | |
301 | } | |
302 | return(state); | |
303 | } | |
304 | ||
305 | /* | |
306 | * Get the ball axis change since the last poll | |
307 | */ | |
308 | int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy) | |
309 | { | |
310 | int retval; | |
311 | ||
312 | if ( ! ValidJoystick(&joystick) ) { | |
313 | return(-1); | |
314 | } | |
315 | ||
316 | retval = 0; | |
317 | if ( ball < joystick->nballs ) { | |
318 | if ( dx ) { | |
319 | *dx = joystick->balls[ball].dx; | |
320 | } | |
321 | if ( dy ) { | |
322 | *dy = joystick->balls[ball].dy; | |
323 | } | |
324 | joystick->balls[ball].dx = 0; | |
325 | joystick->balls[ball].dy = 0; | |
326 | } else { | |
327 | SDL_SetError("Joystick only has %d balls", joystick->nballs); | |
328 | retval = -1; | |
329 | } | |
330 | return(retval); | |
331 | } | |
332 | ||
333 | /* | |
334 | * Get the current state of a button on a joystick | |
335 | */ | |
336 | Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button) | |
337 | { | |
338 | Uint8 state; | |
339 | ||
340 | if ( ! ValidJoystick(&joystick) ) { | |
341 | return(0); | |
342 | } | |
343 | if ( button < joystick->nbuttons ) { | |
344 | state = joystick->buttons[button]; | |
345 | } else { | |
346 | SDL_SetError("Joystick only has %d buttons",joystick->nbuttons); | |
347 | state = 0; | |
348 | } | |
349 | return(state); | |
350 | } | |
351 | ||
352 | /* | |
353 | * Close a joystick previously opened with SDL_JoystickOpen() | |
354 | */ | |
355 | void SDL_JoystickClose(SDL_Joystick *joystick) | |
356 | { | |
357 | int i; | |
358 | ||
359 | if ( ! ValidJoystick(&joystick) ) { | |
360 | return; | |
361 | } | |
362 | ||
363 | /* First decrement ref count */ | |
364 | if ( --joystick->ref_count > 0 ) { | |
365 | return; | |
366 | } | |
367 | ||
368 | /* Lock the event queue - prevent joystick polling */ | |
369 | SDL_Lock_EventThread(); | |
370 | ||
371 | if ( joystick == default_joystick ) { | |
372 | default_joystick = NULL; | |
373 | } | |
374 | SDL_SYS_JoystickClose(joystick); | |
375 | ||
376 | /* Remove joystick from list */ | |
377 | for ( i=0; SDL_joysticks[i]; ++i ) { | |
378 | if ( joystick == SDL_joysticks[i] ) { | |
379 | SDL_memmove(&SDL_joysticks[i], &SDL_joysticks[i+1], | |
380 | (SDL_numjoysticks-i)*sizeof(joystick)); | |
381 | break; | |
382 | } | |
383 | } | |
384 | ||
385 | /* Let the event thread keep running */ | |
386 | SDL_Unlock_EventThread(); | |
387 | ||
388 | /* Free the data associated with this joystick */ | |
389 | if ( joystick->axes ) { | |
390 | SDL_free(joystick->axes); | |
391 | } | |
392 | if ( joystick->hats ) { | |
393 | SDL_free(joystick->hats); | |
394 | } | |
395 | if ( joystick->balls ) { | |
396 | SDL_free(joystick->balls); | |
397 | } | |
398 | if ( joystick->buttons ) { | |
399 | SDL_free(joystick->buttons); | |
400 | } | |
401 | SDL_free(joystick); | |
402 | } | |
403 | ||
404 | void SDL_JoystickQuit(void) | |
405 | { | |
d9504f6e RG |
406 | const int numsticks = SDL_numjoysticks; |
407 | int i; | |
408 | ||
e14743d1 | 409 | /* Stop the event polling */ |
410 | SDL_Lock_EventThread(); | |
411 | SDL_numjoysticks = 0; | |
412 | SDL_Unlock_EventThread(); | |
413 | ||
d9504f6e RG |
414 | if (SDL_joysticks != NULL) { |
415 | for (i = 0; i < numsticks; i++) { | |
416 | SDL_Joystick *stick = SDL_joysticks[i]; | |
417 | if (stick && (stick->ref_count >= 1)) { | |
418 | stick->ref_count = 1; | |
419 | SDL_JoystickClose(stick); | |
420 | } | |
421 | } | |
422 | } | |
423 | ||
e14743d1 | 424 | /* Quit the joystick setup */ |
425 | SDL_SYS_JoystickQuit(); | |
426 | if ( SDL_joysticks ) { | |
427 | SDL_free(SDL_joysticks); | |
428 | SDL_joysticks = NULL; | |
429 | } | |
430 | } | |
431 | ||
432 | ||
433 | /* These are global for SDL_sysjoystick.c and SDL_events.c */ | |
434 | ||
435 | int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value) | |
436 | { | |
437 | int posted; | |
438 | ||
439 | /* Update internal joystick state */ | |
440 | joystick->axes[axis] = value; | |
441 | ||
442 | /* Post the event, if desired */ | |
443 | posted = 0; | |
444 | #if !SDL_EVENTS_DISABLED | |
445 | if ( SDL_ProcessEvents[SDL_JOYAXISMOTION] == SDL_ENABLE ) { | |
446 | SDL_Event event; | |
447 | event.type = SDL_JOYAXISMOTION; | |
448 | event.jaxis.which = joystick->index; | |
449 | event.jaxis.axis = axis; | |
450 | event.jaxis.value = value; | |
451 | if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
452 | posted = 1; | |
453 | SDL_PushEvent(&event); | |
454 | } | |
455 | } | |
456 | #endif /* !SDL_EVENTS_DISABLED */ | |
457 | return(posted); | |
458 | } | |
459 | ||
460 | int SDL_PrivateJoystickHat(SDL_Joystick *joystick, Uint8 hat, Uint8 value) | |
461 | { | |
462 | int posted; | |
463 | ||
464 | /* Update internal joystick state */ | |
465 | joystick->hats[hat] = value; | |
466 | ||
467 | /* Post the event, if desired */ | |
468 | posted = 0; | |
469 | #if !SDL_EVENTS_DISABLED | |
470 | if ( SDL_ProcessEvents[SDL_JOYHATMOTION] == SDL_ENABLE ) { | |
471 | SDL_Event event; | |
472 | event.jhat.type = SDL_JOYHATMOTION; | |
473 | event.jhat.which = joystick->index; | |
474 | event.jhat.hat = hat; | |
475 | event.jhat.value = value; | |
476 | if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
477 | posted = 1; | |
478 | SDL_PushEvent(&event); | |
479 | } | |
480 | } | |
481 | #endif /* !SDL_EVENTS_DISABLED */ | |
482 | return(posted); | |
483 | } | |
484 | ||
485 | int SDL_PrivateJoystickBall(SDL_Joystick *joystick, Uint8 ball, | |
486 | Sint16 xrel, Sint16 yrel) | |
487 | { | |
488 | int posted; | |
489 | ||
490 | /* Update internal mouse state */ | |
491 | joystick->balls[ball].dx += xrel; | |
492 | joystick->balls[ball].dy += yrel; | |
493 | ||
494 | /* Post the event, if desired */ | |
495 | posted = 0; | |
496 | #if !SDL_EVENTS_DISABLED | |
497 | if ( SDL_ProcessEvents[SDL_JOYBALLMOTION] == SDL_ENABLE ) { | |
498 | SDL_Event event; | |
499 | event.jball.type = SDL_JOYBALLMOTION; | |
500 | event.jball.which = joystick->index; | |
501 | event.jball.ball = ball; | |
502 | event.jball.xrel = xrel; | |
503 | event.jball.yrel = yrel; | |
504 | if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
505 | posted = 1; | |
506 | SDL_PushEvent(&event); | |
507 | } | |
508 | } | |
509 | #endif /* !SDL_EVENTS_DISABLED */ | |
510 | return(posted); | |
511 | } | |
512 | ||
513 | int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state) | |
514 | { | |
515 | int posted; | |
516 | #if !SDL_EVENTS_DISABLED | |
517 | SDL_Event event; | |
518 | ||
519 | switch ( state ) { | |
520 | case SDL_PRESSED: | |
521 | event.type = SDL_JOYBUTTONDOWN; | |
522 | break; | |
523 | case SDL_RELEASED: | |
524 | event.type = SDL_JOYBUTTONUP; | |
525 | break; | |
526 | default: | |
527 | /* Invalid state -- bail */ | |
528 | return(0); | |
529 | } | |
530 | #endif /* !SDL_EVENTS_DISABLED */ | |
531 | ||
532 | /* Update internal joystick state */ | |
533 | joystick->buttons[button] = state; | |
534 | ||
535 | /* Post the event, if desired */ | |
536 | posted = 0; | |
537 | #if !SDL_EVENTS_DISABLED | |
538 | if ( SDL_ProcessEvents[event.type] == SDL_ENABLE ) { | |
539 | event.jbutton.which = joystick->index; | |
540 | event.jbutton.button = button; | |
541 | event.jbutton.state = state; | |
542 | if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
543 | posted = 1; | |
544 | SDL_PushEvent(&event); | |
545 | } | |
546 | } | |
547 | #endif /* !SDL_EVENTS_DISABLED */ | |
548 | return(posted); | |
549 | } | |
550 | ||
551 | void SDL_JoystickUpdate(void) | |
552 | { | |
553 | int i; | |
554 | ||
555 | for ( i=0; SDL_joysticks[i]; ++i ) { | |
556 | SDL_SYS_JoystickUpdate(SDL_joysticks[i]); | |
557 | } | |
558 | } | |
559 | ||
560 | int SDL_JoystickEventState(int state) | |
561 | { | |
562 | #if SDL_EVENTS_DISABLED | |
563 | return SDL_IGNORE; | |
564 | #else | |
565 | const Uint8 event_list[] = { | |
566 | SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYHATMOTION, | |
567 | SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP, | |
568 | }; | |
569 | unsigned int i; | |
570 | ||
571 | switch (state) { | |
572 | case SDL_QUERY: | |
573 | state = SDL_IGNORE; | |
574 | for ( i=0; i<SDL_arraysize(event_list); ++i ) { | |
575 | state = SDL_EventState(event_list[i],SDL_QUERY); | |
576 | if ( state == SDL_ENABLE ) { | |
577 | break; | |
578 | } | |
579 | } | |
580 | break; | |
581 | default: | |
582 | for ( i=0; i<SDL_arraysize(event_list); ++i ) { | |
583 | SDL_EventState(event_list[i], state); | |
584 | } | |
585 | break; | |
586 | } | |
587 | return(state); | |
588 | #endif /* SDL_EVENTS_DISABLED */ | |
589 | } |