SDL  2.0
SDL_joystick.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../SDL_internal.h"
22 
23 /* This is the joystick API for Simple DirectMedia Layer */
24 
25 #include "SDL.h"
26 #include "SDL_events.h"
27 #include "SDL_sysjoystick.h"
28 #include "SDL_assert.h"
29 #include "SDL_hints.h"
30 
31 #if !SDL_EVENTS_DISABLED
32 #include "../events/SDL_events_c.h"
33 #endif
34 
36 static SDL_Joystick *SDL_joysticks = NULL;
37 static SDL_Joystick *SDL_updating_joystick = NULL;
38 
39 static void
40 SDL_JoystickAllowBackgroundEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
41 {
42  if (hint && *hint == '1') {
44  } else {
46  }
47 }
48 
49 int
51 {
52  int status;
53 
54  /* See if we should allow joystick events while in the background */
57 
58 #if !SDL_EVENTS_DISABLED
60  return -1;
61  }
62 #endif /* !SDL_EVENTS_DISABLED */
63 
64  status = SDL_SYS_JoystickInit();
65  if (status >= 0) {
66  status = 0;
67  }
68  return (status);
69 }
70 
71 /*
72  * Count the number of joysticks attached to the system
73  */
74 int
76 {
77  return SDL_SYS_NumJoysticks();
78 }
79 
80 /*
81  * Get the implementation dependent name of a joystick
82  */
83 const char *
84 SDL_JoystickNameForIndex(int device_index)
85 {
86  if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
87  SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
88  return (NULL);
89  }
90  return (SDL_SYS_JoystickNameForDeviceIndex(device_index));
91 }
92 
93 /*
94  * Open a joystick for use - the index passed as an argument refers to
95  * the N'th joystick on the system. This index is the value which will
96  * identify this joystick in future joystick events.
97  *
98  * This function returns a joystick identifier, or NULL if an error occurred.
99  */
100 SDL_Joystick *
101 SDL_JoystickOpen(int device_index)
102 {
103  SDL_Joystick *joystick;
104  SDL_Joystick *joysticklist;
105  const char *joystickname = NULL;
106 
107  if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
108  SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
109  return (NULL);
110  }
111 
112  joysticklist = SDL_joysticks;
113  /* If the joystick is already open, return it
114  * it is important that we have a single joystick * for each instance id
115  */
116  while (joysticklist) {
117  if (SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == joysticklist->instance_id) {
118  joystick = joysticklist;
119  ++joystick->ref_count;
120  return (joystick);
121  }
122  joysticklist = joysticklist->next;
123  }
124 
125  /* Create and initialize the joystick */
126  joystick = (SDL_Joystick *) SDL_malloc((sizeof *joystick));
127  if (joystick == NULL) {
128  SDL_OutOfMemory();
129  return NULL;
130  }
131 
132  SDL_memset(joystick, 0, (sizeof *joystick));
133  if (SDL_SYS_JoystickOpen(joystick, device_index) < 0) {
134  SDL_free(joystick);
135  return NULL;
136  }
137 
138  joystickname = SDL_SYS_JoystickNameForDeviceIndex(device_index);
139  if (joystickname)
140  joystick->name = SDL_strdup(joystickname);
141  else
142  joystick->name = NULL;
143 
144  if (joystick->naxes > 0) {
145  joystick->axes = (Sint16 *) SDL_malloc
146  (joystick->naxes * sizeof(Sint16));
147  }
148  if (joystick->nhats > 0) {
149  joystick->hats = (Uint8 *) SDL_malloc
150  (joystick->nhats * sizeof(Uint8));
151  }
152  if (joystick->nballs > 0) {
153  joystick->balls = (struct balldelta *) SDL_malloc
154  (joystick->nballs * sizeof(*joystick->balls));
155  }
156  if (joystick->nbuttons > 0) {
157  joystick->buttons = (Uint8 *) SDL_malloc
158  (joystick->nbuttons * sizeof(Uint8));
159  }
160  if (((joystick->naxes > 0) && !joystick->axes)
161  || ((joystick->nhats > 0) && !joystick->hats)
162  || ((joystick->nballs > 0) && !joystick->balls)
163  || ((joystick->nbuttons > 0) && !joystick->buttons)) {
164  SDL_OutOfMemory();
165  SDL_JoystickClose(joystick);
166  return NULL;
167  }
168  if (joystick->axes) {
169  SDL_memset(joystick->axes, 0, joystick->naxes * sizeof(Sint16));
170  }
171  if (joystick->hats) {
172  SDL_memset(joystick->hats, 0, joystick->nhats * sizeof(Uint8));
173  }
174  if (joystick->balls) {
175  SDL_memset(joystick->balls, 0,
176  joystick->nballs * sizeof(*joystick->balls));
177  }
178  if (joystick->buttons) {
179  SDL_memset(joystick->buttons, 0, joystick->nbuttons * sizeof(Uint8));
180  }
181  joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
182 
183  /* Add joystick to list */
184  ++joystick->ref_count;
185  /* Link the joystick in the list */
186  joystick->next = SDL_joysticks;
187  SDL_joysticks = joystick;
188 
189  SDL_SYS_JoystickUpdate(joystick);
190 
191  return (joystick);
192 }
193 
194 
195 /*
196  * Checks to make sure the joystick is valid.
197  */
198 int
199 SDL_PrivateJoystickValid(SDL_Joystick * joystick)
200 {
201  int valid;
202 
203  if (joystick == NULL) {
204  SDL_SetError("Joystick hasn't been opened yet");
205  valid = 0;
206  } else {
207  valid = 1;
208  }
209 
210  return valid;
211 }
212 
213 /*
214  * Get the number of multi-dimensional axis controls on a joystick
215  */
216 int
217 SDL_JoystickNumAxes(SDL_Joystick * joystick)
218 {
219  if (!SDL_PrivateJoystickValid(joystick)) {
220  return (-1);
221  }
222  return (joystick->naxes);
223 }
224 
225 /*
226  * Get the number of hats on a joystick
227  */
228 int
229 SDL_JoystickNumHats(SDL_Joystick * joystick)
230 {
231  if (!SDL_PrivateJoystickValid(joystick)) {
232  return (-1);
233  }
234  return (joystick->nhats);
235 }
236 
237 /*
238  * Get the number of trackballs on a joystick
239  */
240 int
241 SDL_JoystickNumBalls(SDL_Joystick * joystick)
242 {
243  if (!SDL_PrivateJoystickValid(joystick)) {
244  return (-1);
245  }
246  return (joystick->nballs);
247 }
248 
249 /*
250  * Get the number of buttons on a joystick
251  */
252 int
253 SDL_JoystickNumButtons(SDL_Joystick * joystick)
254 {
255  if (!SDL_PrivateJoystickValid(joystick)) {
256  return (-1);
257  }
258  return (joystick->nbuttons);
259 }
260 
261 /*
262  * Get the current state of an axis control on a joystick
263  */
264 Sint16
265 SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis)
266 {
267  Sint16 state;
268 
269  if (!SDL_PrivateJoystickValid(joystick)) {
270  return (0);
271  }
272  if (axis < joystick->naxes) {
273  state = joystick->axes[axis];
274  } else {
275  SDL_SetError("Joystick only has %d axes", joystick->naxes);
276  state = 0;
277  }
278  return (state);
279 }
280 
281 /*
282  * Get the current state of a hat on a joystick
283  */
284 Uint8
285 SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
286 {
287  Uint8 state;
288 
289  if (!SDL_PrivateJoystickValid(joystick)) {
290  return (0);
291  }
292  if (hat < joystick->nhats) {
293  state = joystick->hats[hat];
294  } else {
295  SDL_SetError("Joystick only has %d hats", joystick->nhats);
296  state = 0;
297  }
298  return (state);
299 }
300 
301 /*
302  * Get the ball axis change since the last poll
303  */
304 int
305 SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy)
306 {
307  int retval;
308 
309  if (!SDL_PrivateJoystickValid(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  return SDL_SetError("Joystick only has %d balls", joystick->nballs);
325  }
326  return (retval);
327 }
328 
329 /*
330  * Get the current state of a button on a joystick
331  */
332 Uint8
333 SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
334 {
335  Uint8 state;
336 
337  if (!SDL_PrivateJoystickValid(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  * Return if the joystick in question is currently attached to the system,
351  * \return SDL_FALSE if not plugged in, SDL_TRUE if still present.
352  */
353 SDL_bool
354 SDL_JoystickGetAttached(SDL_Joystick * joystick)
355 {
356  if (!SDL_PrivateJoystickValid(joystick)) {
357  return SDL_FALSE;
358  }
359 
360  return SDL_SYS_JoystickAttached(joystick);
361 }
362 
363 /*
364  * Get the instance id for this opened joystick
365  */
367 SDL_JoystickInstanceID(SDL_Joystick * joystick)
368 {
369  if (!SDL_PrivateJoystickValid(joystick)) {
370  return (-1);
371  }
372 
373  return (joystick->instance_id);
374 }
375 
376 /*
377  * Find the SDL_Joystick that owns this instance id
378  */
379 SDL_Joystick *
381 {
382  SDL_Joystick *joystick = SDL_joysticks;
383  while (joystick) {
384  if (joystick->instance_id == joyid) {
385  return joystick;
386  }
387  joystick = joystick->next;
388  }
389 
390  return NULL;
391 }
392 
393 /*
394  * Get the friendly name of this joystick
395  */
396 const char *
397 SDL_JoystickName(SDL_Joystick * joystick)
398 {
399  if (!SDL_PrivateJoystickValid(joystick)) {
400  return (NULL);
401  }
402 
403  return (joystick->name);
404 }
405 
406 /*
407  * Close a joystick previously opened with SDL_JoystickOpen()
408  */
409 void
410 SDL_JoystickClose(SDL_Joystick * joystick)
411 {
412  SDL_Joystick *joysticklist;
413  SDL_Joystick *joysticklistprev;
414 
415  if (!joystick) {
416  return;
417  }
418 
419  /* First decrement ref count */
420  if (--joystick->ref_count > 0) {
421  return;
422  }
423 
424  if (joystick == SDL_updating_joystick) {
425  return;
426  }
427 
428  SDL_SYS_JoystickClose(joystick);
429  joystick->hwdata = NULL;
430 
431  joysticklist = SDL_joysticks;
432  joysticklistprev = NULL;
433  while (joysticklist) {
434  if (joystick == joysticklist) {
435  if (joysticklistprev) {
436  /* unlink this entry */
437  joysticklistprev->next = joysticklist->next;
438  } else {
439  SDL_joysticks = joystick->next;
440  }
441  break;
442  }
443  joysticklistprev = joysticklist;
444  joysticklist = joysticklist->next;
445  }
446 
447  SDL_free(joystick->name);
448 
449  /* Free the data associated with this joystick */
450  SDL_free(joystick->axes);
451  SDL_free(joystick->hats);
452  SDL_free(joystick->balls);
453  SDL_free(joystick->buttons);
454  SDL_free(joystick);
455 }
456 
457 void
459 {
460  /* Make sure we're not getting called in the middle of updating joysticks */
462 
463  /* Stop the event polling */
464  while (SDL_joysticks) {
465  SDL_joysticks->ref_count = 1;
467  }
468 
469  /* Quit the joystick setup */
471 
472 #if !SDL_EVENTS_DISABLED
474 #endif
475 }
476 
477 
478 static SDL_bool
480 {
482  return SDL_FALSE;
483  }
484 
486  if (SDL_GetKeyboardFocus() == NULL) {
487  /* Video is initialized and we don't have focus, ignore the event. */
488  return SDL_TRUE;
489  } else {
490  return SDL_FALSE;
491  }
492  }
493 
494  /* Video subsystem wasn't initialized, always allow the event */
495  return SDL_FALSE;
496 }
497 
498 /* These are global for SDL_sysjoystick.c and SDL_events.c */
499 
500 int
501 SDL_PrivateJoystickAxis(SDL_Joystick * joystick, Uint8 axis, Sint16 value)
502 {
503  int posted;
504 
505  /* Make sure we're not getting garbage or duplicate events */
506  if (axis >= joystick->naxes) {
507  return 0;
508  }
509  if (value == joystick->axes[axis]) {
510  return 0;
511  }
512 
513  /* We ignore events if we don't have keyboard focus, except for centering
514  * events.
515  */
517  if ((value > 0 && value >= joystick->axes[axis]) ||
518  (value < 0 && value <= joystick->axes[axis])) {
519  return 0;
520  }
521  }
522 
523  /* Update internal joystick state */
524  joystick->axes[axis] = value;
525 
526  /* Post the event, if desired */
527  posted = 0;
528 #if !SDL_EVENTS_DISABLED
531  event.type = SDL_JOYAXISMOTION;
532  event.jaxis.which = joystick->instance_id;
533  event.jaxis.axis = axis;
534  event.jaxis.value = value;
535  posted = SDL_PushEvent(&event) == 1;
536  }
537 #endif /* !SDL_EVENTS_DISABLED */
538  return (posted);
539 }
540 
541 int
542 SDL_PrivateJoystickHat(SDL_Joystick * joystick, Uint8 hat, Uint8 value)
543 {
544  int posted;
545 
546  /* Make sure we're not getting garbage or duplicate events */
547  if (hat >= joystick->nhats) {
548  return 0;
549  }
550  if (value == joystick->hats[hat]) {
551  return 0;
552  }
553 
554  /* We ignore events if we don't have keyboard focus, except for centering
555  * events.
556  */
558  if (value != SDL_HAT_CENTERED) {
559  return 0;
560  }
561  }
562 
563  /* Update internal joystick state */
564  joystick->hats[hat] = value;
565 
566  /* Post the event, if desired */
567  posted = 0;
568 #if !SDL_EVENTS_DISABLED
571  event.jhat.type = SDL_JOYHATMOTION;
572  event.jhat.which = joystick->instance_id;
573  event.jhat.hat = hat;
574  event.jhat.value = value;
575  posted = SDL_PushEvent(&event) == 1;
576  }
577 #endif /* !SDL_EVENTS_DISABLED */
578  return (posted);
579 }
580 
581 int
582 SDL_PrivateJoystickBall(SDL_Joystick * joystick, Uint8 ball,
583  Sint16 xrel, Sint16 yrel)
584 {
585  int posted;
586 
587  /* Make sure we're not getting garbage events */
588  if (ball >= joystick->nballs) {
589  return 0;
590  }
591 
592  /* We ignore events if we don't have keyboard focus. */
594  return 0;
595  }
596 
597  /* Update internal mouse state */
598  joystick->balls[ball].dx += xrel;
599  joystick->balls[ball].dy += yrel;
600 
601  /* Post the event, if desired */
602  posted = 0;
603 #if !SDL_EVENTS_DISABLED
606  event.jball.type = SDL_JOYBALLMOTION;
607  event.jball.which = joystick->instance_id;
608  event.jball.ball = ball;
609  event.jball.xrel = xrel;
610  event.jball.yrel = yrel;
611  posted = SDL_PushEvent(&event) == 1;
612  }
613 #endif /* !SDL_EVENTS_DISABLED */
614  return (posted);
615 }
616 
617 int
619 {
620  int posted;
621 #if !SDL_EVENTS_DISABLED
623 
624  switch (state) {
625  case SDL_PRESSED:
626  event.type = SDL_JOYBUTTONDOWN;
627  break;
628  case SDL_RELEASED:
629  event.type = SDL_JOYBUTTONUP;
630  break;
631  default:
632  /* Invalid state -- bail */
633  return (0);
634  }
635 #endif /* !SDL_EVENTS_DISABLED */
636 
637  /* Make sure we're not getting garbage or duplicate events */
638  if (button >= joystick->nbuttons) {
639  return 0;
640  }
641  if (state == joystick->buttons[button]) {
642  return 0;
643  }
644 
645  /* We ignore events if we don't have keyboard focus, except for button
646  * release. */
648  if (state == SDL_PRESSED) {
649  return 0;
650  }
651  }
652 
653  /* Update internal joystick state */
654  joystick->buttons[button] = state;
655 
656  /* Post the event, if desired */
657  posted = 0;
658 #if !SDL_EVENTS_DISABLED
659  if (SDL_GetEventState(event.type) == SDL_ENABLE) {
660  event.jbutton.which = joystick->instance_id;
661  event.jbutton.button = button;
662  event.jbutton.state = state;
663  posted = SDL_PushEvent(&event) == 1;
664  }
665 #endif /* !SDL_EVENTS_DISABLED */
666  return (posted);
667 }
668 
669 void
671 {
672  SDL_Joystick *joystick;
673 
674  joystick = SDL_joysticks;
675  while (joystick) {
676  SDL_Joystick *joysticknext;
677  /* save off the next pointer, the Update call may cause a joystick removed event
678  * and cause our joystick pointer to be freed
679  */
680  joysticknext = joystick->next;
681 
682  SDL_updating_joystick = joystick;
683 
684  SDL_SYS_JoystickUpdate(joystick);
685 
686  if (joystick->force_recentering) {
687  int i;
688 
689  /* Tell the app that everything is centered/unpressed... */
690  for (i = 0; i < joystick->naxes; i++) {
691  SDL_PrivateJoystickAxis(joystick, i, 0);
692  }
693 
694  for (i = 0; i < joystick->nbuttons; i++) {
695  SDL_PrivateJoystickButton(joystick, i, 0);
696  }
697 
698  for (i = 0; i < joystick->nhats; i++) {
700  }
701 
702  joystick->force_recentering = SDL_FALSE;
703  }
704 
706 
707  /* If the joystick was closed while updating, free it here */
708  if (joystick->ref_count <= 0) {
709  SDL_JoystickClose(joystick);
710  }
711 
712  joystick = joysticknext;
713  }
714 
715  /* this needs to happen AFTER walking the joystick list above, so that any
716  dangling hardware data from removed devices can be free'd
717  */
719 }
720 
721 int
723 {
724 #if SDL_EVENTS_DISABLED
725  return SDL_DISABLE;
726 #else
727  const Uint32 event_list[] = {
730  };
731  unsigned int i;
732 
733  switch (state) {
734  case SDL_QUERY:
735  state = SDL_DISABLE;
736  for (i = 0; i < SDL_arraysize(event_list); ++i) {
737  state = SDL_EventState(event_list[i], SDL_QUERY);
738  if (state == SDL_ENABLE) {
739  break;
740  }
741  }
742  break;
743  default:
744  for (i = 0; i < SDL_arraysize(event_list); ++i) {
745  SDL_EventState(event_list[i], state);
746  }
747  break;
748  }
749  return (state);
750 #endif /* SDL_EVENTS_DISABLED */
751 }
752 
753 /* return the guid for this index */
755 {
756  if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
757  SDL_JoystickGUID emptyGUID;
758  SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
759  SDL_zero(emptyGUID);
760  return emptyGUID;
761  }
762  return SDL_SYS_JoystickGetDeviceGUID(device_index);
763 }
764 
765 /* return the guid for this opened device */
766 SDL_JoystickGUID SDL_JoystickGetGUID(SDL_Joystick * joystick)
767 {
768  if (!SDL_PrivateJoystickValid(joystick)) {
769  SDL_JoystickGUID emptyGUID;
770  SDL_zero(emptyGUID);
771  return emptyGUID;
772  }
773  return SDL_SYS_JoystickGetGUID(joystick);
774 }
775 
776 /* convert the guid to a printable string */
777 void SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID)
778 {
779  static const char k_rgchHexToASCII[] = "0123456789abcdef";
780  int i;
781 
782  if ((pszGUID == NULL) || (cbGUID <= 0)) {
783  return;
784  }
785 
786  for (i = 0; i < sizeof(guid.data) && i < (cbGUID-1)/2; i++) {
787  /* each input byte writes 2 ascii chars, and might write a null byte. */
788  /* If we don't have room for next input byte, stop */
789  unsigned char c = guid.data[i];
790 
791  *pszGUID++ = k_rgchHexToASCII[c >> 4];
792  *pszGUID++ = k_rgchHexToASCII[c & 0x0F];
793  }
794  *pszGUID = '\0';
795 }
796 
797 
798 /*-----------------------------------------------------------------------------
799  * Purpose: Returns the 4 bit nibble for a hex character
800  * Input : c -
801  * Output : unsigned char
802  *-----------------------------------------------------------------------------*/
803 static unsigned char nibble(char c)
804 {
805  if ((c >= '0') && (c <= '9')) {
806  return (unsigned char)(c - '0');
807  }
808 
809  if ((c >= 'A') && (c <= 'F')) {
810  return (unsigned char)(c - 'A' + 0x0a);
811  }
812 
813  if ((c >= 'a') && (c <= 'f')) {
814  return (unsigned char)(c - 'a' + 0x0a);
815  }
816 
817  /* received an invalid character, and no real way to return an error */
818  /* AssertMsg1(false, "Q_nibble invalid hex character '%c' ", c); */
819  return 0;
820 }
821 
822 
823 /* convert the string version of a joystick guid to the struct */
825 {
826  SDL_JoystickGUID guid;
827  int maxoutputbytes= sizeof(guid);
828  size_t len = SDL_strlen(pchGUID);
829  Uint8 *p;
830  size_t i;
831 
832  /* Make sure it's even */
833  len = (len) & ~0x1;
834 
835  SDL_memset(&guid, 0x00, sizeof(guid));
836 
837  p = (Uint8 *)&guid;
838  for (i = 0; (i < len) && ((p - (Uint8 *)&guid) < maxoutputbytes); i+=2, p++) {
839  *p = (nibble(pchGUID[i]) << 4) | nibble(pchGUID[i+1]);
840  }
841 
842  return guid;
843 }
844 
845 
846 /* update the power level for this joystick */
847 void SDL_PrivateJoystickBatteryLevel(SDL_Joystick * joystick, SDL_JoystickPowerLevel ePowerLevel)
848 {
849  joystick->epowerlevel = ePowerLevel;
850 }
851 
852 
853 /* return its power level */
855 {
856  if (!SDL_PrivateJoystickValid(joystick)) {
858  }
859  return joystick->epowerlevel;
860 }
861 
862 
863 /* vi: set ts=4 sw=4 expandtab: */
void SDL_JoystickUpdate(void)
Definition: SDL_joystick.c:670
#define SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS
A variable that lets you enable joystick (and gamecontroller) events even when your app is in the bac...
Definition: SDL_hints.h:334
#define SDL_INIT_EVENTS
Definition: SDL.h:81
int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy)
Definition: SDL_joystick.c:305
int SDL_PrivateJoystickValid(SDL_Joystick *joystick)
Definition: SDL_joystick.c:199
static SDL_Joystick * SDL_updating_joystick
Definition: SDL_joystick.c:37
GLuint GLfloat GLfloat GLfloat x1
SDL_Texture * button
void SDL_JoystickClose(SDL_Joystick *joystick)
Definition: SDL_joystick.c:410
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:155
int SDL_PrivateJoystickHat(SDL_Joystick *joystick, Uint8 hat, Uint8 value)
Definition: SDL_joystick.c:542
int SDL_SYS_NumJoysticks()
#define SDL_QuitSubSystem
int SDL_JoystickInit(void)
Definition: SDL_joystick.c:50
struct xkb_state * state
GLfloat GLfloat p
int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state)
Definition: SDL_joystick.c:618
int SDL_JoystickNumHats(SDL_Joystick *joystick)
Definition: SDL_joystick.c:229
#define SDL_ENABLE
Definition: SDL_events.h:718
#define SDL_InitSubSystem
GLuint const GLchar * name
SDL_Texture * axis
void SDL_SYS_JoystickQuit(void)
#define SDL_GetKeyboardFocus
Uint8 data[16]
Definition: SDL_joystick.h:69
GLenum GLsizei len
int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value)
Definition: SDL_joystick.c:501
SDL_JoystickPowerLevel SDL_JoystickCurrentPowerLevel(SDL_Joystick *joystick)
Definition: SDL_joystick.c:854
SDL_bool
Definition: SDL_stdinc.h:126
SDL_bool retval
const char * SDL_JoystickName(SDL_Joystick *joystick)
Definition: SDL_joystick.c:397
int SDL_JoystickEventState(int state)
Definition: SDL_joystick.c:722
int SDL_PrivateJoystickBall(SDL_Joystick *joystick, Uint8 ball, Sint16 xrel, Sint16 yrel)
Definition: SDL_joystick.c:582
int SDL_NumJoysticks(void)
Definition: SDL_joystick.c:75
static SDL_bool SDL_joystick_allows_background_events
Definition: SDL_joystick.c:35
#define SDL_GetEventState(type)
Definition: SDL_events.h:731
Sint32 SDL_JoystickID
Definition: SDL_joystick.h:72
GLsizei const GLfloat * value
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:139
struct _cl_event * event
void SDL_free(void *mem)
SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick)
SDL_JoystickGUID SDL_JoystickGetGUID(SDL_Joystick *joystick)
Definition: SDL_joystick.c:766
#define SDL_PushEvent
const GLubyte * c
void SDL_SYS_JoystickDetect()
#define SDL_zero(x)
Definition: SDL_stdinc.h:355
const char * SDL_SYS_JoystickNameForDeviceIndex(int device_index)
SDL_Joystick * SDL_JoystickOpen(int device_index)
Definition: SDL_joystick.c:101
int SDL_JoystickNumAxes(SDL_Joystick *joystick)
Definition: SDL_joystick.c:217
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
SDL_JoystickPowerLevel
Definition: SDL_joystick.h:74
SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick *joystick)
SDL_Joystick * SDL_JoystickFromInstanceID(SDL_JoystickID joyid)
Definition: SDL_joystick.c:380
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
#define SDL_assert(condition)
Definition: SDL_assert.h:167
int SDL_SYS_JoystickInit(void)
SDL_JoystickGUID SDL_JoystickGetDeviceGUID(int device_index)
Definition: SDL_joystick.c:754
SDL_JoystickGUID SDL_JoystickGetGUIDFromString(const char *pchGUID)
Definition: SDL_joystick.c:824
#define SDL_DISABLE
Definition: SDL_events.h:717
#define NULL
Definition: begin_code.h:143
int SDL_JoystickNumBalls(SDL_Joystick *joystick)
Definition: SDL_joystick.c:241
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_Joystick * joystick
#define SDL_SetError
static unsigned char nibble(char c)
Definition: SDL_joystick.c:803
SDL_JoystickID SDL_JoystickInstanceID(SDL_Joystick *joystick)
Definition: SDL_joystick.c:367
#define SDL_strlen
#define SDL_strdup
void SDL_PrivateJoystickBatteryLevel(SDL_Joystick *joystick, SDL_JoystickPowerLevel ePowerLevel)
Definition: SDL_joystick.c:847
#define SDL_EventState
#define SDL_AddHintCallback
int SDL_JoystickNumButtons(SDL_Joystick *joystick)
Definition: SDL_joystick.c:253
void SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID)
Definition: SDL_joystick.c:777
SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index)
static SDL_bool SDL_PrivateJoystickShouldIgnoreEvent()
Definition: SDL_joystick.c:479
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:93
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick, int device_index)
General event structure.
Definition: SDL_events.h:521
#define SDL_malloc
Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button)
Definition: SDL_joystick.c:333
Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat)
Definition: SDL_joystick.c:285
void SDL_JoystickQuit(void)
Definition: SDL_joystick.c:458
static void SDL_JoystickAllowBackgroundEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
Definition: SDL_joystick.c:40
#define SDL_PRESSED
Definition: SDL_events.h:50
#define SDL_QUERY
Definition: SDL_events.h:715
#define SDL_WasInit
#define SDL_HAT_CENTERED
Definition: SDL_joystick.h:207
SDL_bool SDL_JoystickGetAttached(SDL_Joystick *joystick)
Definition: SDL_joystick.c:354
void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
#define SDL_RELEASED
Definition: SDL_events.h:49
SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID(int device_index)
const char * SDL_JoystickNameForIndex(int device_index)
Definition: SDL_joystick.c:84
#define SDL_INIT_VIDEO
Definition: SDL.h:77
#define SDL_memset
int16_t Sint16
A signed 16-bit integer type.
Definition: SDL_stdinc.h:143
Uint32 type
Definition: SDL_events.h:523
static SDL_Joystick * SDL_joysticks
Definition: SDL_joystick.c:36
Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis)
Definition: SDL_joystick.c:265