/
SDL_joystick.c
1923 lines (1641 loc) · 53.6 KB
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
/* This is the joystick API for Simple DirectMedia Layer */
#include "SDL.h"
26
#include "SDL_atomic.h"
27
28
29
30
31
32
33
34
#include "SDL_events.h"
#include "SDL_sysjoystick.h"
#include "SDL_assert.h"
#include "SDL_hints.h"
#if !SDL_EVENTS_DISABLED
#include "../events/SDL_events_c.h"
#endif
35
#include "../video/SDL_sysvideo.h"
36
#include "hidapi/SDL_hidapijoystick_c.h"
38
39
/* This is included in only one place because it has a large static list of controllers */
#include "controller_type.h"
41
42
#ifdef __WIN32__
/* Needed for checking for input remapping programs */
43
#include "../core/windows/SDL_windows.h"
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
#undef UNICODE /* We want ASCII functions */
#include <tlhelp32.h>
#endif
static SDL_JoystickDriver *SDL_joystick_drivers[] = {
#if defined(SDL_JOYSTICK_DINPUT) || defined(SDL_JOYSTICK_XINPUT)
&SDL_WINDOWS_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_LINUX
&SDL_LINUX_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_IOKIT
&SDL_DARWIN_JoystickDriver,
#endif
#if defined(__IPHONEOS__) || defined(__TVOS__)
&SDL_IOS_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_ANDROID
&SDL_ANDROID_JoystickDriver,
#endif
65
66
67
#ifdef SDL_JOYSTICK_EMSCRIPTEN
&SDL_EMSCRIPTEN_JoystickDriver,
#endif
68
69
70
#ifdef SDL_JOYSTICK_HAIKU
&SDL_HAIKU_JoystickDriver,
#endif
71
72
73
#ifdef SDL_JOYSTICK_USBHID /* !!! FIXME: "USBHID" is a generic name, and doubly-confusing with HIDAPI next to it. This is the *BSD interface, rename this. */
&SDL_BSD_JoystickDriver,
#endif
74
75
76
77
78
79
80
#ifdef SDL_JOYSTICK_HIDAPI
&SDL_HIDAPI_JoystickDriver,
#endif
#if defined(SDL_JOYSTICK_DUMMY) || defined(SDL_JOYSTICK_DISABLED)
&SDL_DUMMY_JoystickDriver
#endif
};
81
82
static SDL_bool SDL_joystick_allows_background_events = SDL_FALSE;
static SDL_Joystick *SDL_joysticks = NULL;
83
static SDL_bool SDL_updating_joystick = SDL_FALSE;
84
static SDL_mutex *SDL_joystick_lock = NULL; /* This needs to support recursive locks */
85
static SDL_atomic_t SDL_next_joystick_instance_id;
86
87
static int SDL_joystick_player_count = 0;
static SDL_JoystickID *SDL_joystick_players = NULL;
90
SDL_LockJoysticks(void)
91
92
93
94
95
96
{
if (SDL_joystick_lock) {
SDL_LockMutex(SDL_joystick_lock);
}
}
98
SDL_UnlockJoysticks(void)
99
100
101
102
103
104
{
if (SDL_joystick_lock) {
SDL_UnlockMutex(SDL_joystick_lock);
}
}
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
static int
SDL_FindFreePlayerIndex()
{
int player_index;
for (player_index = 0; player_index < SDL_joystick_player_count; ++player_index) {
if (SDL_joystick_players[player_index] == -1) {
return player_index;
}
}
return player_index;
}
static int
SDL_GetPlayerIndexForJoystickID(SDL_JoystickID instance_id)
{
int player_index;
for (player_index = 0; player_index < SDL_joystick_player_count; ++player_index) {
if (instance_id == SDL_joystick_players[player_index]) {
break;
}
}
if (player_index == SDL_joystick_player_count) {
player_index = -1;
}
return player_index;
}
static SDL_JoystickID
SDL_GetJoystickIDForPlayerIndex(int player_index)
{
if (player_index < 0 || player_index >= SDL_joystick_player_count) {
return -1;
}
return SDL_joystick_players[player_index];
}
static SDL_bool
SDL_SetJoystickIDForPlayerIndex(int player_index, SDL_JoystickID instance_id)
{
SDL_JoystickID existing_instance = SDL_GetJoystickIDForPlayerIndex(player_index);
SDL_JoystickDriver *driver;
int device_index;
if (player_index < 0) {
return SDL_FALSE;
}
if (player_index >= SDL_joystick_player_count) {
SDL_JoystickID *new_players = (SDL_JoystickID *)SDL_realloc(SDL_joystick_players, (player_index + 1)*sizeof(*SDL_joystick_players));
if (!new_players) {
SDL_OutOfMemory();
return SDL_FALSE;
}
SDL_joystick_players = new_players;
161
162
SDL_memset(&SDL_joystick_players[SDL_joystick_player_count], 0xFF, (player_index - SDL_joystick_player_count + 1) * sizeof(SDL_joystick_players[0]));
SDL_joystick_player_count = player_index + 1;
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
}
SDL_joystick_players[player_index] = instance_id;
/* Update the driver with the new index */
device_index = SDL_JoystickGetDeviceIndexFromInstanceID(instance_id);
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
driver->SetDevicePlayerIndex(device_index, player_index);
}
/* Move any existing joystick to another slot */
if (existing_instance >= 0) {
SDL_SetJoystickIDForPlayerIndex(SDL_FindFreePlayerIndex(), existing_instance);
}
return SDL_TRUE;
}
180
static void SDLCALL
181
182
183
184
185
186
187
188
189
190
191
192
SDL_JoystickAllowBackgroundEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
if (hint && *hint == '1') {
SDL_joystick_allows_background_events = SDL_TRUE;
} else {
SDL_joystick_allows_background_events = SDL_FALSE;
}
}
int
SDL_JoystickInit(void)
{
193
int i, status;
195
196
SDL_GameControllerInitMappings();
197
198
199
200
201
/* Create the joystick list lock */
if (!SDL_joystick_lock) {
SDL_joystick_lock = SDL_CreateMutex();
}
202
203
204
205
206
207
208
209
210
211
/* See if we should allow joystick events while in the background */
SDL_AddHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
#if !SDL_EVENTS_DISABLED
if (SDL_InitSubSystem(SDL_INIT_EVENTS) < 0) {
return -1;
}
#endif /* !SDL_EVENTS_DISABLED */
212
213
214
215
216
status = -1;
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
if (SDL_joystick_drivers[i]->Init() >= 0) {
status = 0;
}
218
return status;
219
220
221
222
223
224
225
226
}
/*
* Count the number of joysticks attached to the system
*/
int
SDL_NumJoysticks(void)
{
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
int i, total_joysticks = 0;
SDL_LockJoysticks();
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
total_joysticks += SDL_joystick_drivers[i]->GetCount();
}
SDL_UnlockJoysticks();
return total_joysticks;
}
/*
* Return the next available joystick instance ID
* This may be called by drivers from multiple threads, unprotected by any locks
*/
SDL_JoystickID SDL_GetNextJoystickInstanceID()
{
return SDL_AtomicIncRef(&SDL_next_joystick_instance_id);
}
/*
* Get the driver and device index for an API device index
* This should be called while the joystick lock is held, to prevent another thread from updating the list
*/
SDL_bool
SDL_GetDriverAndJoystickIndex(int device_index, SDL_JoystickDriver **driver, int *driver_index)
{
int i, num_joysticks, total_joysticks = 0;
if (device_index >= 0) {
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
num_joysticks = SDL_joystick_drivers[i]->GetCount();
if (device_index < num_joysticks) {
*driver = SDL_joystick_drivers[i];
*driver_index = device_index;
return SDL_TRUE;
}
device_index -= num_joysticks;
total_joysticks += num_joysticks;
}
}
SDL_SetError("There are %d joysticks available", total_joysticks);
return SDL_FALSE;
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
/*
* Perform any needed fixups for joystick names
*/
static const char *
SDL_FixupJoystickName(const char *name)
{
if (name) {
const char *skip_prefix = "NVIDIA Corporation ";
if (SDL_strncmp(name, skip_prefix, SDL_strlen(skip_prefix)) == 0) {
name += SDL_strlen(skip_prefix);
}
}
return name;
}
288
289
290
291
292
293
/*
* Get the implementation dependent name of a joystick
*/
const char *
SDL_JoystickNameForIndex(int device_index)
{
294
295
296
297
298
299
SDL_JoystickDriver *driver;
const char *name = NULL;
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
name = SDL_FixupJoystickName(driver->GetDeviceName(device_index));
301
302
303
304
SDL_UnlockJoysticks();
/* FIXME: Really we should reference count this name so it doesn't go away after unlock */
return name;
307
308
309
/*
* Get the player index of a joystick, or -1 if it's not available
*/
310
311
312
int
SDL_JoystickGetDevicePlayerIndex(int device_index)
{
313
int player_index;
314
315
SDL_LockJoysticks();
316
player_index = SDL_GetPlayerIndexForJoystickID(SDL_JoystickGetDeviceInstanceID(device_index));
317
318
319
320
321
SDL_UnlockJoysticks();
return player_index;
}
322
323
324
325
326
327
328
329
/*
* Return true if this joystick is known to have all axes centered at zero
* This isn't generally needed unless the joystick never generates an initial axis value near zero,
* e.g. it's emulating axes with digital buttons
*/
static SDL_bool
SDL_JoystickAxesCenteredAtZero(SDL_Joystick *joystick)
{
330
331
332
static Uint32 zero_centered_joysticks[] = {
MAKE_VIDPID(0x0e8f, 0x3013), /* HuiJia SNES USB adapter */
MAKE_VIDPID(0x05a0, 0x3232), /* 8Bitdo Zero Gamepad */
333
334
335
};
int i;
336
337
Uint32 id = MAKE_VIDPID(SDL_JoystickGetVendor(joystick),
SDL_JoystickGetProduct(joystick));
339
340
/*printf("JOYSTICK '%s' VID/PID 0x%.4x/0x%.4x AXES: %d\n", joystick->name, vendor, product, joystick->naxes);*/
341
342
343
344
345
if (joystick->naxes == 2) {
/* Assume D-pad or thumbstick style axes are centered at 0 */
return SDL_TRUE;
}
346
for (i = 0; i < SDL_arraysize(zero_centered_joysticks); ++i) {
347
if (id == zero_centered_joysticks[i]) {
348
349
350
351
352
353
return SDL_TRUE;
}
}
return SDL_FALSE;
}
354
355
356
357
358
359
360
361
362
363
/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *
SDL_JoystickOpen(int device_index)
{
364
365
SDL_JoystickDriver *driver;
SDL_JoystickID instance_id;
366
367
368
369
SDL_Joystick *joystick;
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
370
SDL_LockJoysticks();
372
373
374
375
376
if (!SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
SDL_UnlockJoysticks();
return NULL;
}
377
378
joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
379
380
* it is important that we have a single joystick * for each instance id
*/
381
instance_id = driver->GetDeviceInstanceID(device_index);
382
while (joysticklist) {
383
if (instance_id == joysticklist->instance_id) {
384
385
joystick = joysticklist;
++joystick->ref_count;
386
SDL_UnlockJoysticks();
387
return joystick;
388
389
390
391
392
}
joysticklist = joysticklist->next;
}
/* Create and initialize the joystick */
393
joystick = (SDL_Joystick *) SDL_calloc(sizeof(*joystick), 1);
394
395
if (joystick == NULL) {
SDL_OutOfMemory();
396
SDL_UnlockJoysticks();
397
398
return NULL;
}
399
400
joystick->driver = driver;
joystick->instance_id = instance_id;
401
joystick->attached = SDL_TRUE;
402
joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
404
if (driver->Open(joystick, device_index) < 0) {
405
SDL_free(joystick);
406
SDL_UnlockJoysticks();
407
408
409
return NULL;
}
410
411
joystickname = driver->GetDeviceName(device_index);
if (joystickname) {
412
joystick->name = SDL_strdup(joystickname);
414
joystick->name = NULL;
415
416
417
}
joystick->guid = driver->GetDeviceGUID(device_index);
418
419
if (joystick->naxes > 0) {
420
joystick->axes = (SDL_JoystickAxisInfo *) SDL_calloc(joystick->naxes, sizeof(SDL_JoystickAxisInfo));
421
422
}
if (joystick->nhats > 0) {
423
joystick->hats = (Uint8 *) SDL_calloc(joystick->nhats, sizeof(Uint8));
424
425
}
if (joystick->nballs > 0) {
426
joystick->balls = (struct balldelta *) SDL_calloc(joystick->nballs, sizeof(*joystick->balls));
427
428
}
if (joystick->nbuttons > 0) {
429
joystick->buttons = (Uint8 *) SDL_calloc(joystick->nbuttons, sizeof(Uint8));
430
431
432
433
434
435
436
}
if (((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
437
SDL_UnlockJoysticks();
438
439
440
return NULL;
}
441
442
443
444
445
446
447
448
449
/* If this joystick is known to have all zero centered axes, skip the auto-centering code */
if (SDL_JoystickAxesCenteredAtZero(joystick)) {
int i;
for (i = 0; i < joystick->naxes; ++i) {
joystick->axes[i].has_initial_value = SDL_TRUE;
}
}
450
451
joystick->is_game_controller = SDL_IsGameController(device_index);
452
453
454
455
456
457
/* Add joystick to list */
++joystick->ref_count;
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
458
SDL_UnlockJoysticks();
460
driver->Update(joystick);
462
return joystick;
463
464
465
466
467
468
}
/*
* Checks to make sure the joystick is valid.
*/
470
471
SDL_PrivateJoystickValid(SDL_Joystick * joystick)
{
472
SDL_bool valid;
473
474
475
if (joystick == NULL) {
SDL_SetError("Joystick hasn't been opened yet");
476
valid = SDL_FALSE;
478
valid = SDL_TRUE;
479
480
481
482
483
484
485
486
487
488
489
490
}
return valid;
}
/*
* Get the number of multi-dimensional axis controls on a joystick
*/
int
SDL_JoystickNumAxes(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
493
return joystick->naxes;
494
495
496
497
498
499
500
501
502
}
/*
* Get the number of hats on a joystick
*/
int
SDL_JoystickNumHats(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
505
return joystick->nhats;
506
507
508
509
510
511
512
513
514
}
/*
* Get the number of trackballs on a joystick
*/
int
SDL_JoystickNumBalls(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
517
return joystick->nballs;
518
519
520
521
522
523
524
525
526
}
/*
* Get the number of buttons on a joystick
*/
int
SDL_JoystickNumButtons(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
529
return joystick->nbuttons;
530
531
532
533
534
535
536
537
538
539
540
}
/*
* Get the current state of an axis control on a joystick
*/
Sint16
SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis)
{
Sint16 state;
if (!SDL_PrivateJoystickValid(joystick)) {
542
543
}
if (axis < joystick->naxes) {
544
state = joystick->axes[axis].value;
545
546
547
548
} else {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
state = 0;
}
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
/*
* Get the initial state of an axis control on a joystick
*/
SDL_bool
SDL_JoystickGetAxisInitialState(SDL_Joystick * joystick, int axis, Sint16 *state)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return SDL_FALSE;
}
if (axis >= joystick->naxes) {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
return SDL_FALSE;
}
if (state) {
*state = joystick->axes[axis].initial_value;
}
return joystick->axes[axis].has_initial_value;
}
571
572
573
574
575
576
577
578
579
/*
* Get the current state of a hat on a joystick
*/
Uint8
SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
581
582
583
584
585
586
587
}
if (hat < joystick->nhats) {
state = joystick->hats[hat];
} else {
SDL_SetError("Joystick only has %d hats", joystick->nhats);
state = 0;
}
589
590
591
592
593
594
595
596
597
598
599
}
/*
* Get the ball axis change since the last poll
*/
int
SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy)
{
int retval;
if (!SDL_PrivateJoystickValid(joystick)) {
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
}
retval = 0;
if (ball < joystick->nballs) {
if (dx) {
*dx = joystick->balls[ball].dx;
}
if (dy) {
*dy = joystick->balls[ball].dy;
}
joystick->balls[ball].dx = 0;
joystick->balls[ball].dy = 0;
} else {
return SDL_SetError("Joystick only has %d balls", joystick->nballs);
}
616
return retval;
617
618
619
620
621
622
623
624
625
626
627
}
/*
* Get the current state of a button on a joystick
*/
Uint8
SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
629
630
631
632
633
634
635
}
if (button < joystick->nbuttons) {
state = joystick->buttons[button];
} else {
SDL_SetError("Joystick only has %d buttons", joystick->nbuttons);
state = 0;
}
637
638
639
640
641
642
643
644
645
646
647
648
649
}
/*
* Return if the joystick in question is currently attached to the system,
* \return SDL_FALSE if not plugged in, SDL_TRUE if still present.
*/
SDL_bool
SDL_JoystickGetAttached(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return SDL_FALSE;
}
650
return joystick->attached;
651
652
653
654
655
656
657
658
659
}
/*
* Get the instance id for this opened joystick
*/
SDL_JoystickID
SDL_JoystickInstanceID(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
663
return joystick->instance_id;
667
* Return the SDL_Joystick associated with an instance id.
668
669
*/
SDL_Joystick *
670
SDL_JoystickFromInstanceID(SDL_JoystickID instance_id)
672
673
SDL_Joystick *joystick;
674
SDL_LockJoysticks();
675
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
if (joystick->instance_id == instance_id) {
break;
}
}
SDL_UnlockJoysticks();
return joystick;
}
/**
* Return the SDL_Joystick associated with a player index.
*/
SDL_Joystick *
SDL_JoystickFromPlayerIndex(int player_index)
{
SDL_JoystickID instance_id;
SDL_Joystick *joystick;
SDL_LockJoysticks();
instance_id = SDL_GetJoystickIDForPlayerIndex(player_index);
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
if (joystick->instance_id == instance_id) {
697
break;
700
SDL_UnlockJoysticks();
701
return joystick;
704
705
706
707
708
709
710
/*
* Get the friendly name of this joystick
*/
const char *
SDL_JoystickName(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
714
return SDL_FixupJoystickName(joystick->name);
717
718
719
/**
* Get the player index of an opened joystick, or -1 if it's not available
*/
720
721
722
int
SDL_JoystickGetPlayerIndex(SDL_Joystick * joystick)
{
723
724
int player_index;
725
726
727
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
SDL_LockJoysticks();
player_index = SDL_GetPlayerIndexForJoystickID(joystick->instance_id);
SDL_UnlockJoysticks();
return player_index;
}
/**
* Set the player index of an opened joystick
*/
void
SDL_JoystickSetPlayerIndex(SDL_Joystick * joystick, int player_index)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return;
}
SDL_LockJoysticks();
SDL_SetJoystickIDForPlayerIndex(player_index, joystick->instance_id);
SDL_UnlockJoysticks();
751
752
753
int
SDL_JoystickRumble(SDL_Joystick * joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms)
{
754
755
int result;
756
757
758
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
759
760
761
762
763
764
SDL_LockJoysticks();
result = joystick->driver->Rumble(joystick, low_frequency_rumble, high_frequency_rumble, duration_ms);
SDL_UnlockJoysticks();
return result;
767
768
769
770
771
772
773
774
775
/*
* Close a joystick previously opened with SDL_JoystickOpen()
*/
void
SDL_JoystickClose(SDL_Joystick * joystick)
{
SDL_Joystick *joysticklist;
SDL_Joystick *joysticklistprev;
776
if (!SDL_PrivateJoystickValid(joystick)) {
777
778
779
return;
}
780
SDL_LockJoysticks();
782
783
/* First decrement ref count */
if (--joystick->ref_count > 0) {
784
SDL_UnlockJoysticks();
785
786
787
return;
}
788
if (SDL_updating_joystick) {
789
SDL_UnlockJoysticks();
790
791
792
return;
}
793
joystick->driver->Close(joystick);
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
joystick->hwdata = NULL;
joysticklist = SDL_joysticks;
joysticklistprev = NULL;
while (joysticklist) {
if (joystick == joysticklist) {
if (joysticklistprev) {
/* unlink this entry */
joysticklistprev->next = joysticklist->next;
} else {
SDL_joysticks = joystick->next;
}
break;
}
joysticklistprev = joysticklist;
joysticklist = joysticklist->next;
}
SDL_free(joystick->name);
/* Free the data associated with this joystick */
SDL_free(joystick->axes);
SDL_free(joystick->hats);
SDL_free(joystick->balls);
SDL_free(joystick->buttons);
SDL_free(joystick);
821
SDL_UnlockJoysticks();
822
823
824
825
826
}
void
SDL_JoystickQuit(void)
{
829
/* Make sure we're not getting called in the middle of updating joysticks */
830
SDL_LockJoysticks();
831
832
833
834
835
while (SDL_updating_joystick) {
SDL_UnlockJoysticks();
SDL_Delay(1);
SDL_LockJoysticks();
}
837
838
839
840
841
842
843
/* Stop the event polling */
while (SDL_joysticks) {
SDL_joysticks->ref_count = 1;
SDL_JoystickClose(SDL_joysticks);
}
/* Quit the joystick setup */
844
845
846
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
SDL_joystick_drivers[i]->Quit();
}
848
849
850
851
852
if (SDL_joystick_players) {
SDL_free(SDL_joystick_players);
SDL_joystick_players = NULL;
SDL_joystick_player_count = 0;
}
853
SDL_UnlockJoysticks();
855
856
857
#if !SDL_EVENTS_DISABLED
SDL_QuitSubSystem(SDL_INIT_EVENTS);
#endif
859
860
861
SDL_DelHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
862
if (SDL_joystick_lock) {
863
SDL_mutex *mutex = SDL_joystick_lock;
864
SDL_joystick_lock = NULL;
865
SDL_DestroyMutex(mutex);
867
868
SDL_GameControllerQuitMappings();
869
870
871
872
873
874
875
876
877
878
}
static SDL_bool
SDL_PrivateJoystickShouldIgnoreEvent()
{
if (SDL_joystick_allows_background_events) {
return SDL_FALSE;
}
879
880
881
if (SDL_HasWindows() && SDL_GetKeyboardFocus() == NULL) {
/* We have windows but we don't have focus, ignore the event. */
return SDL_TRUE;
882
883
884
885
886
887
}
return SDL_FALSE;
}
/* These are global for SDL_sysjoystick.c and SDL_events.c */
888
void SDL_PrivateJoystickAdded(SDL_JoystickID device_instance)
890
891
892
893
SDL_JoystickDriver *driver;
int driver_device_index;
int player_index = -1;
int device_index = SDL_JoystickGetDeviceIndexFromInstanceID(device_instance);
894
895
896
if (device_index < 0) {
return;
}
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &driver_device_index)) {
player_index = driver->GetDevicePlayerIndex(driver_device_index);
}
if (player_index < 0 && SDL_IsGameController(device_index)) {
player_index = SDL_FindFreePlayerIndex();
}
if (player_index >= 0) {
SDL_SetJoystickIDForPlayerIndex(player_index, device_instance);
}
SDL_UnlockJoysticks();
#if !SDL_EVENTS_DISABLED
{
SDL_Event event;
914
915
916
917
918
919
event.type = SDL_JOYDEVICEADDED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = device_index;
SDL_PushEvent(&event);
}
920
921
922
923
924
925
926
927
928
929
930
931
932
}
#endif /* !SDL_EVENTS_DISABLED */
}
/*
* If there is an existing add event in the queue, it needs to be modified
* to have the right value for which, because the number of controllers in
* the system is now one less.
*/
static void UpdateEventsForDeviceRemoval()
{
int i, num_events;
SDL_Event *events;
933
SDL_bool isstack;
934
935
936
937
938
939
num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_JOYDEVICEADDED, SDL_JOYDEVICEADDED);
if (num_events <= 0) {
return;
}
940
events = SDL_small_alloc(SDL_Event, num_events, &isstack);
941
942
943
944
945
946
947
948
949
950
if (!events) {
return;
}
num_events = SDL_PeepEvents(events, num_events, SDL_GETEVENT, SDL_JOYDEVICEADDED, SDL_JOYDEVICEADDED);
for (i = 0; i < num_events; ++i) {
--events[i].jdevice.which;
}
SDL_PeepEvents(events, num_events, SDL_ADDEVENT, 0, 0);
951
SDL_small_free(events, isstack);
952
953
954
955
}
void SDL_PrivateJoystickRemoved(SDL_JoystickID device_instance)
{
956
SDL_Joystick *joystick;
957
int player_index;
959
960
961
962
963
964
965
#if !SDL_EVENTS_DISABLED
SDL_Event event;
event.type = SDL_JOYDEVICEREMOVED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = device_instance;
966
SDL_PushEvent(&event);
967
968
969
970
}
UpdateEventsForDeviceRemoval();
#endif /* !SDL_EVENTS_DISABLED */
971
972
973
974
975
976
977
978
979
/* Mark this joystick as no longer attached */
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
if (joystick->instance_id == device_instance) {
joystick->attached = SDL_FALSE;
joystick->force_recentering = SDL_TRUE;
break;
}
}
980
981
982
983
984
985
986
SDL_LockJoysticks();
player_index = SDL_GetPlayerIndexForJoystickID(device_instance);
if (player_index >= 0) {
SDL_joystick_players[player_index] = -1;
}
SDL_UnlockJoysticks();
989
990
991
992
int
SDL_PrivateJoystickAxis(SDL_Joystick * joystick, Uint8 axis, Sint16 value)
{
int posted;
993
SDL_JoystickAxisInfo *info;
994
995
996
997
998
/* Make sure we're not getting garbage or duplicate events */
if (axis >= joystick->naxes) {
return 0;
}
999
1000
info = &joystick->axes[axis];