/
SDL_mmjoystick.c
416 lines (364 loc) · 11 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 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
11
12
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
Lesser General Public License for more details.
14
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
22
23
24
*/
/* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */
25
26
27
28
#include "SDL_windows.h"
#include <mmsystem.h>
#include <regstr.h>
29
#include "SDL_events.h"
30
31
32
33
#include "SDL_joystick.h"
#include "SDL_sysjoystick.h"
#include "SDL_joystick_c.h"
34
#define MAX_JOYSTICKS 16
35
36
37
38
#define MAX_AXES 6 /* each joystick can have up to 6 axes */
#define MAX_BUTTONS 32 /* and 32 buttons */
#define AXIS_MIN -32768 /* minimum value for axis coordinate */
#define AXIS_MAX 32767 /* maximum value for axis coordinate */
39
40
/* limit axis to 256 possible positions to filter out noise */
#define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256)
41
42
43
44
45
46
#define JOY_BUTTON_FLAG(n) (1<<n)
/* array to hold joystick ID values */
static UINT SYS_JoystickID[MAX_JOYSTICKS];
static JOYCAPS SYS_Joystick[MAX_JOYSTICKS];
47
static char *SYS_JoystickName[MAX_JOYSTICKS];
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
/* The private structure used to keep track of a joystick */
struct joystick_hwdata
{
/* joystick ID */
UINT id;
/* values used to translate device-specific coordinates into
SDL-standard ranges */
struct _transaxis {
int offset;
float scale;
} transaxis[6];
};
/* Convert a win32 Multimedia API return code to a text message */
static void SetMMerror(char *function, int code);
67
static char *GetJoystickName(int index, const char *szRegKey)
68
69
70
71
72
73
74
75
76
77
78
79
80
81
{
/* added 7/24/2004 by Eckhard Stolberg */
/*
see if there is a joystick for the current
index (1-16) listed in the registry
*/
char *name = NULL;
HKEY hKey;
DWORD regsize;
LONG regresult;
unsigned char regkey[256];
unsigned char regvalue[256];
unsigned char regname[256];
82
SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s\\%s",
83
84
85
86
87
88
89
90
91
92
93
94
REGSTR_PATH_JOYCONFIG,
szRegKey,
REGSTR_KEY_JOYCURR);
regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE,
(LPTSTR) ®key, 0, KEY_READ, &hKey);
if (regresult == ERROR_SUCCESS)
{
/*
find the registry key name for the
joystick's properties
*/
regsize = sizeof(regname);
95
SDL_snprintf((char *) regvalue, SDL_arraysize(regvalue),
96
"Joystick%d%s", index+1,
97
98
REGSTR_VAL_JOYOEMNAME);
regresult = RegQueryValueExA(hKey,
99
(char *) regvalue, 0, 0, (LPBYTE) ®name,
100
101
102
103
104
(LPDWORD) ®size);
RegCloseKey(hKey);
if (regresult == ERROR_SUCCESS)
{
/* open that registry key */
105
SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s",
106
107
REGSTR_PATH_JOYOEM, regname);
regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE,
108
(char *) regkey, 0, KEY_READ, &hKey);
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
if (regresult == ERROR_SUCCESS)
{
/* find the size for the OEM name text */
regsize = sizeof(regvalue);
regresult =
RegQueryValueExA(hKey,
REGSTR_VAL_JOYOEMNAME,
0, 0, NULL,
(LPDWORD) ®size);
if (regresult == ERROR_SUCCESS)
{
/*
allocate enough memory
for the OEM name text ...
*/
124
name = (char *) SDL_malloc(regsize);
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/* ... and read it from the registry */
regresult =
RegQueryValueExA(hKey,
REGSTR_VAL_JOYOEMNAME, 0, 0,
(LPBYTE) name,
(LPDWORD) ®size);
RegCloseKey(hKey);
}
}
}
}
return(name);
}
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/* Function to scan the system for joysticks.
* This function should set SDL_numjoysticks to the number of available
* joysticks. Joystick 0 should be the system default joystick.
* It should return 0, or -1 on an unrecoverable fatal error.
*/
int SDL_SYS_JoystickInit(void)
{
int i;
int maxdevs;
int numdevs;
JOYINFOEX joyinfo;
JOYCAPS joycaps;
MMRESULT result;
numdevs = 0;
maxdevs = joyGetNumDevs();
155
156
157
158
159
if ( maxdevs > MAX_JOYSTICKS ) {
maxdevs = MAX_JOYSTICKS;
}
160
161
162
for ( i = 0; i < MAX_JOYSTICKS; i++ ) {
SYS_JoystickID[i] = JOYSTICKID1 + i;
163
SYS_JoystickName[i] = NULL;
164
165
}
166
167
for ( i = 0; (i < maxdevs); ++i ) {
168
169
170
171
172
173
/* added 8/31/2001 By Vitaliy Mikitchenko */
joyinfo.dwSize = sizeof(joyinfo);
joyinfo.dwFlags = JOY_RETURNALL;
/* end addition */
174
175
176
177
178
179
result = joyGetPosEx(SYS_JoystickID[i], &joyinfo);
if ( result == JOYERR_NOERROR ) {
result = joyGetDevCaps(SYS_JoystickID[i], &joycaps, sizeof(joycaps));
if ( result == JOYERR_NOERROR ) {
SYS_JoystickID[numdevs] = SYS_JoystickID[i];
SYS_Joystick[numdevs] = joycaps;
180
SYS_JoystickName[numdevs] = GetJoystickName(numdevs, joycaps.szRegKey);
181
182
183
184
185
186
187
188
189
190
numdevs++;
}
}
}
return(numdevs);
}
/* Function to get the device-dependent name of a joystick */
const char *SDL_SYS_JoystickName(int index)
{
191
192
if ( SYS_JoystickName[index] != NULL ) {
return(SYS_JoystickName[index]);
193
194
195
} else {
return(SYS_Joystick[index].szPname);
}
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
}
/* Function to open a joystick for use.
The joystick to open is specified by the index field of the joystick.
This should fill the nbuttons and naxes fields of the joystick structure.
It returns 0, or -1 if there is an error.
*/
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
{
int index, i;
int caps_flags[MAX_AXES-2] =
{ JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV };
int axis_min[MAX_AXES], axis_max[MAX_AXES];
/* shortcut */
index = joystick->index;
axis_min[0] = SYS_Joystick[index].wXmin;
axis_max[0] = SYS_Joystick[index].wXmax;
axis_min[1] = SYS_Joystick[index].wYmin;
axis_max[1] = SYS_Joystick[index].wYmax;
axis_min[2] = SYS_Joystick[index].wZmin;
axis_max[2] = SYS_Joystick[index].wZmax;
axis_min[3] = SYS_Joystick[index].wRmin;
axis_max[3] = SYS_Joystick[index].wRmax;
axis_min[4] = SYS_Joystick[index].wUmin;
axis_max[4] = SYS_Joystick[index].wUmax;
axis_min[5] = SYS_Joystick[index].wVmin;
axis_max[5] = SYS_Joystick[index].wVmax;
/* allocate memory for system specific hardware data */
227
joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata));
228
229
230
231
232
if (joystick->hwdata == NULL)
{
SDL_OutOfMemory();
return(-1);
}
233
SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
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
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/* set hardware data */
joystick->hwdata->id = SYS_JoystickID[index];
for ( i = 0; i < MAX_AXES; ++i ) {
if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) {
joystick->hwdata->transaxis[i].offset =
AXIS_MIN - axis_min[i];
joystick->hwdata->transaxis[i].scale =
(float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]);
} else {
joystick->hwdata->transaxis[i].offset = 0;
joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */
}
}
/* fill nbuttons, naxes, and nhats fields */
joystick->nbuttons = SYS_Joystick[index].wNumButtons;
joystick->naxes = SYS_Joystick[index].wNumAxes;
if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) {
joystick->nhats = 1;
} else {
joystick->nhats = 0;
}
return(0);
}
static Uint8 TranslatePOV(DWORD value)
{
Uint8 pos;
pos = SDL_HAT_CENTERED;
if ( value != JOY_POVCENTERED ) {
if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) {
pos |= SDL_HAT_UP;
}
if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) {
pos |= SDL_HAT_RIGHT;
}
if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) {
pos |= SDL_HAT_DOWN;
}
if ( value > JOY_POVBACKWARD ) {
pos |= SDL_HAT_LEFT;
}
}
return(pos);
}
/* Function to update the state of a joystick - called as a device poll.
* This function shouldn't update the joystick structure directly,
* but instead should call SDL_PrivateJoystick*() to deliver events
* and update joystick device state.
*/
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
{
MMRESULT result;
int i;
DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ,
JOY_RETURNR, JOY_RETURNU, JOY_RETURNV };
DWORD pos[MAX_AXES];
struct _transaxis *transaxis;
int value, change;
JOYINFOEX joyinfo;
joyinfo.dwSize = sizeof(joyinfo);
joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS;
if ( ! joystick->hats ) {
joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS);
}
result = joyGetPosEx(joystick->hwdata->id, &joyinfo);
if ( result != JOYERR_NOERROR ) {
SetMMerror("joyGetPosEx", result);
return;
}
/* joystick motion events */
pos[0] = joyinfo.dwXpos;
pos[1] = joyinfo.dwYpos;
pos[2] = joyinfo.dwZpos;
pos[3] = joyinfo.dwRpos;
pos[4] = joyinfo.dwUpos;
pos[5] = joyinfo.dwVpos;
transaxis = joystick->hwdata->transaxis;
for (i = 0; i < joystick->naxes; i++) {
if (joyinfo.dwFlags & flags[i]) {
320
value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale);
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
change = (value - joystick->axes[i]);
if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) {
SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value);
}
}
}
/* joystick button events */
if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) {
for ( i = 0; i < joystick->nbuttons; ++i ) {
if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) {
if ( ! joystick->buttons[i] ) {
SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED);
}
} else {
if ( joystick->buttons[i] ) {
SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED);
}
}
}
}
/* joystick hat events */
if ( joyinfo.dwFlags & JOY_RETURNPOV ) {
Uint8 pos;
pos = TranslatePOV(joyinfo.dwPOV);
if ( pos != joystick->hats[0] ) {
SDL_PrivateJoystickHat(joystick, 0, pos);
}
}
}
/* Function to close a joystick after use */
void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
{
if (joystick->hwdata != NULL) {
/* free system specific hardware data */
359
SDL_free(joystick->hwdata);
360
361
362
363
364
365
}
}
/* Function to perform any system-specific joystick related cleanup */
void SDL_SYS_JoystickQuit(void)
{
366
367
int i;
for (i = 0; i < MAX_JOYSTICKS; i++) {
368
if ( SYS_JoystickName[i] != NULL ) {
369
SDL_free(SYS_JoystickName[i]);
370
371
}
}
372
373
374
375
376
377
378
}
/* implementation functions */
void SetMMerror(char *function, int code)
{
static char *error;
379
static char errbuf[1024];
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
errbuf[0] = 0;
switch (code)
{
case MMSYSERR_NODRIVER:
error = "Joystick driver not present";
break;
case MMSYSERR_INVALPARAM:
case JOYERR_PARMS:
error = "Invalid parameter(s)";
break;
case MMSYSERR_BADDEVICEID:
error = "Bad device ID";
break;
case JOYERR_UNPLUGGED:
error = "Joystick not attached";
break;
case JOYERR_NOCANDO:
error = "Can't capture joystick input";
break;
default:
406
SDL_snprintf(errbuf, SDL_arraysize(errbuf),
407
"%s: Unknown Multimedia system error: 0x%x",
408
409
410
411
412
function, code);
break;
}
if ( ! errbuf[0] ) {
413
SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error);
414
415
416
}
SDL_SetError("%s", errbuf);
}