Mercurial > sdl-ios-xcode
comparison src/joystick/windows/SDL_mmjoystick.c @ 5062:e8916fe9cfc8
Fixed bug #925
Changed "win32" to "windows"
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 20 Jan 2011 18:04:05 -0800 |
parents | src/joystick/win32/SDL_mmjoystick.c@f7b03b6838cb |
children | 327f181542f1 |
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5061:9e9940eae455 | 5062:e8916fe9cfc8 |
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1 /* | |
2 SDL - Simple DirectMedia Layer | |
3 Copyright (C) 1997-2010 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 #ifdef SDL_JOYSTICK_WINMM | |
25 | |
26 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */ | |
27 | |
28 #define WIN32_LEAN_AND_MEAN | |
29 #include <windows.h> | |
30 #include <mmsystem.h> | |
31 #include <regstr.h> | |
32 | |
33 #include "SDL_events.h" | |
34 #include "SDL_joystick.h" | |
35 #include "../SDL_sysjoystick.h" | |
36 #include "../SDL_joystick_c.h" | |
37 | |
38 #define MAX_JOYSTICKS 16 | |
39 #define MAX_AXES 6 /* each joystick can have up to 6 axes */ | |
40 #define MAX_BUTTONS 32 /* and 32 buttons */ | |
41 #define AXIS_MIN -32768 /* minimum value for axis coordinate */ | |
42 #define AXIS_MAX 32767 /* maximum value for axis coordinate */ | |
43 /* limit axis to 256 possible positions to filter out noise */ | |
44 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) | |
45 #define JOY_BUTTON_FLAG(n) (1<<n) | |
46 | |
47 | |
48 /* array to hold joystick ID values */ | |
49 static UINT SYS_JoystickID[MAX_JOYSTICKS]; | |
50 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS]; | |
51 static char *SYS_JoystickName[MAX_JOYSTICKS]; | |
52 | |
53 /* The private structure used to keep track of a joystick */ | |
54 struct joystick_hwdata | |
55 { | |
56 /* joystick ID */ | |
57 UINT id; | |
58 | |
59 /* values used to translate device-specific coordinates into | |
60 SDL-standard ranges */ | |
61 struct _transaxis | |
62 { | |
63 int offset; | |
64 float scale; | |
65 } transaxis[6]; | |
66 }; | |
67 | |
68 /* Convert a Windows Multimedia API return code to a text message */ | |
69 static void SetMMerror(char *function, int code); | |
70 | |
71 | |
72 static char * | |
73 GetJoystickName(int index, const char *szRegKey) | |
74 { | |
75 /* added 7/24/2004 by Eckhard Stolberg */ | |
76 /* | |
77 see if there is a joystick for the current | |
78 index (1-16) listed in the registry | |
79 */ | |
80 char *name = NULL; | |
81 HKEY hTopKey; | |
82 HKEY hKey; | |
83 DWORD regsize; | |
84 LONG regresult; | |
85 char regkey[256]; | |
86 char regvalue[256]; | |
87 char regname[256]; | |
88 | |
89 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s\\%s", | |
90 REGSTR_PATH_JOYCONFIG, szRegKey, REGSTR_KEY_JOYCURR); | |
91 hTopKey = HKEY_LOCAL_MACHINE; | |
92 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); | |
93 if (regresult != ERROR_SUCCESS) { | |
94 hTopKey = HKEY_CURRENT_USER; | |
95 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); | |
96 } | |
97 if (regresult != ERROR_SUCCESS) { | |
98 return NULL; | |
99 } | |
100 | |
101 /* find the registry key name for the joystick's properties */ | |
102 regsize = sizeof(regname); | |
103 SDL_snprintf(regvalue, SDL_arraysize(regvalue), "Joystick%d%s", index + 1, | |
104 REGSTR_VAL_JOYOEMNAME); | |
105 regresult = | |
106 RegQueryValueExA(hKey, regvalue, 0, 0, (LPBYTE) regname, ®size); | |
107 RegCloseKey(hKey); | |
108 | |
109 if (regresult != ERROR_SUCCESS) { | |
110 return NULL; | |
111 } | |
112 | |
113 /* open that registry key */ | |
114 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s", REGSTR_PATH_JOYOEM, | |
115 regname); | |
116 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); | |
117 if (regresult != ERROR_SUCCESS) { | |
118 return NULL; | |
119 } | |
120 | |
121 /* find the size for the OEM name text */ | |
122 regsize = sizeof(regvalue); | |
123 regresult = | |
124 RegQueryValueExA(hKey, REGSTR_VAL_JOYOEMNAME, 0, 0, NULL, ®size); | |
125 if (regresult == ERROR_SUCCESS) { | |
126 /* allocate enough memory for the OEM name text ... */ | |
127 name = (char *) SDL_malloc(regsize); | |
128 if (name) { | |
129 /* ... and read it from the registry */ | |
130 regresult = RegQueryValueExA(hKey, | |
131 REGSTR_VAL_JOYOEMNAME, 0, 0, | |
132 (LPBYTE) name, ®size); | |
133 } | |
134 } | |
135 RegCloseKey(hKey); | |
136 | |
137 return (name); | |
138 } | |
139 | |
140 /* Function to scan the system for joysticks. | |
141 * This function should set SDL_numjoysticks to the number of available | |
142 * joysticks. Joystick 0 should be the system default joystick. | |
143 * It should return 0, or -1 on an unrecoverable fatal error. | |
144 */ | |
145 int | |
146 SDL_SYS_JoystickInit(void) | |
147 { | |
148 int i; | |
149 int maxdevs; | |
150 int numdevs; | |
151 JOYINFOEX joyinfo; | |
152 JOYCAPS joycaps; | |
153 MMRESULT result; | |
154 | |
155 /* Reset the joystick ID & name mapping tables */ | |
156 for (i = 0; i < MAX_JOYSTICKS; ++i) { | |
157 SYS_JoystickID[i] = 0; | |
158 SYS_JoystickName[i] = NULL; | |
159 } | |
160 | |
161 /* Loop over all potential joystick devices */ | |
162 numdevs = 0; | |
163 maxdevs = joyGetNumDevs(); | |
164 for (i = JOYSTICKID1; i < maxdevs && numdevs < MAX_JOYSTICKS; ++i) { | |
165 | |
166 joyinfo.dwSize = sizeof(joyinfo); | |
167 joyinfo.dwFlags = JOY_RETURNALL; | |
168 result = joyGetPosEx(i, &joyinfo); | |
169 if (result == JOYERR_NOERROR) { | |
170 result = joyGetDevCaps(i, &joycaps, sizeof(joycaps)); | |
171 if (result == JOYERR_NOERROR) { | |
172 SYS_JoystickID[numdevs] = i; | |
173 SYS_Joystick[numdevs] = joycaps; | |
174 SYS_JoystickName[numdevs] = | |
175 GetJoystickName(i, joycaps.szRegKey); | |
176 numdevs++; | |
177 } | |
178 } | |
179 } | |
180 return (numdevs); | |
181 } | |
182 | |
183 /* Function to get the device-dependent name of a joystick */ | |
184 const char * | |
185 SDL_SYS_JoystickName(int index) | |
186 { | |
187 if (SYS_JoystickName[index] != NULL) { | |
188 return (SYS_JoystickName[index]); | |
189 } else { | |
190 return (SYS_Joystick[index].szPname); | |
191 } | |
192 } | |
193 | |
194 /* Function to open a joystick for use. | |
195 The joystick to open is specified by the index field of the joystick. | |
196 This should fill the nbuttons and naxes fields of the joystick structure. | |
197 It returns 0, or -1 if there is an error. | |
198 */ | |
199 int | |
200 SDL_SYS_JoystickOpen(SDL_Joystick * joystick) | |
201 { | |
202 int index, i; | |
203 int caps_flags[MAX_AXES - 2] = | |
204 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV }; | |
205 int axis_min[MAX_AXES], axis_max[MAX_AXES]; | |
206 | |
207 | |
208 /* shortcut */ | |
209 index = joystick->index; | |
210 axis_min[0] = SYS_Joystick[index].wXmin; | |
211 axis_max[0] = SYS_Joystick[index].wXmax; | |
212 axis_min[1] = SYS_Joystick[index].wYmin; | |
213 axis_max[1] = SYS_Joystick[index].wYmax; | |
214 axis_min[2] = SYS_Joystick[index].wZmin; | |
215 axis_max[2] = SYS_Joystick[index].wZmax; | |
216 axis_min[3] = SYS_Joystick[index].wRmin; | |
217 axis_max[3] = SYS_Joystick[index].wRmax; | |
218 axis_min[4] = SYS_Joystick[index].wUmin; | |
219 axis_max[4] = SYS_Joystick[index].wUmax; | |
220 axis_min[5] = SYS_Joystick[index].wVmin; | |
221 axis_max[5] = SYS_Joystick[index].wVmax; | |
222 | |
223 /* allocate memory for system specific hardware data */ | |
224 joystick->hwdata = | |
225 (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); | |
226 if (joystick->hwdata == NULL) { | |
227 SDL_OutOfMemory(); | |
228 return (-1); | |
229 } | |
230 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); | |
231 | |
232 /* set hardware data */ | |
233 joystick->hwdata->id = SYS_JoystickID[index]; | |
234 for (i = 0; i < MAX_AXES; ++i) { | |
235 if ((i < 2) || (SYS_Joystick[index].wCaps & caps_flags[i - 2])) { | |
236 joystick->hwdata->transaxis[i].offset = AXIS_MIN - axis_min[i]; | |
237 joystick->hwdata->transaxis[i].scale = | |
238 (float) (AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]); | |
239 } else { | |
240 joystick->hwdata->transaxis[i].offset = 0; | |
241 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */ | |
242 } | |
243 } | |
244 | |
245 /* fill nbuttons, naxes, and nhats fields */ | |
246 joystick->nbuttons = SYS_Joystick[index].wNumButtons; | |
247 joystick->naxes = SYS_Joystick[index].wNumAxes; | |
248 if (SYS_Joystick[index].wCaps & JOYCAPS_HASPOV) { | |
249 joystick->nhats = 1; | |
250 } else { | |
251 joystick->nhats = 0; | |
252 } | |
253 return (0); | |
254 } | |
255 | |
256 static Uint8 | |
257 TranslatePOV(DWORD value) | |
258 { | |
259 Uint8 pos; | |
260 | |
261 pos = SDL_HAT_CENTERED; | |
262 if (value != JOY_POVCENTERED) { | |
263 if ((value > JOY_POVLEFT) || (value < JOY_POVRIGHT)) { | |
264 pos |= SDL_HAT_UP; | |
265 } | |
266 if ((value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD)) { | |
267 pos |= SDL_HAT_RIGHT; | |
268 } | |
269 if ((value > JOY_POVRIGHT) && (value < JOY_POVLEFT)) { | |
270 pos |= SDL_HAT_DOWN; | |
271 } | |
272 if (value > JOY_POVBACKWARD) { | |
273 pos |= SDL_HAT_LEFT; | |
274 } | |
275 } | |
276 return (pos); | |
277 } | |
278 | |
279 /* Function to update the state of a joystick - called as a device poll. | |
280 * This function shouldn't update the joystick structure directly, | |
281 * but instead should call SDL_PrivateJoystick*() to deliver events | |
282 * and update joystick device state. | |
283 */ | |
284 void | |
285 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick) | |
286 { | |
287 MMRESULT result; | |
288 int i; | |
289 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ, | |
290 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV | |
291 }; | |
292 DWORD pos[MAX_AXES]; | |
293 struct _transaxis *transaxis; | |
294 int value, change; | |
295 JOYINFOEX joyinfo; | |
296 | |
297 joyinfo.dwSize = sizeof(joyinfo); | |
298 joyinfo.dwFlags = JOY_RETURNALL | JOY_RETURNPOVCTS; | |
299 if (!joystick->hats) { | |
300 joyinfo.dwFlags &= ~(JOY_RETURNPOV | JOY_RETURNPOVCTS); | |
301 } | |
302 result = joyGetPosEx(joystick->hwdata->id, &joyinfo); | |
303 if (result != JOYERR_NOERROR) { | |
304 SetMMerror("joyGetPosEx", result); | |
305 return; | |
306 } | |
307 | |
308 /* joystick motion events */ | |
309 pos[0] = joyinfo.dwXpos; | |
310 pos[1] = joyinfo.dwYpos; | |
311 pos[2] = joyinfo.dwZpos; | |
312 pos[3] = joyinfo.dwRpos; | |
313 pos[4] = joyinfo.dwUpos; | |
314 pos[5] = joyinfo.dwVpos; | |
315 | |
316 transaxis = joystick->hwdata->transaxis; | |
317 for (i = 0; i < joystick->naxes; i++) { | |
318 if (joyinfo.dwFlags & flags[i]) { | |
319 value = | |
320 (int) (((float) pos[i] + | |
321 transaxis[i].offset) * transaxis[i].scale); | |
322 change = (value - joystick->axes[i]); | |
323 if ((change < -JOY_AXIS_THRESHOLD) | |
324 || (change > JOY_AXIS_THRESHOLD)) { | |
325 SDL_PrivateJoystickAxis(joystick, (Uint8) i, (Sint16) value); | |
326 } | |
327 } | |
328 } | |
329 | |
330 /* joystick button events */ | |
331 if (joyinfo.dwFlags & JOY_RETURNBUTTONS) { | |
332 for (i = 0; i < joystick->nbuttons; ++i) { | |
333 if (joyinfo.dwButtons & JOY_BUTTON_FLAG(i)) { | |
334 if (!joystick->buttons[i]) { | |
335 SDL_PrivateJoystickButton(joystick, (Uint8) i, | |
336 SDL_PRESSED); | |
337 } | |
338 } else { | |
339 if (joystick->buttons[i]) { | |
340 SDL_PrivateJoystickButton(joystick, (Uint8) i, | |
341 SDL_RELEASED); | |
342 } | |
343 } | |
344 } | |
345 } | |
346 | |
347 /* joystick hat events */ | |
348 if (joyinfo.dwFlags & JOY_RETURNPOV) { | |
349 Uint8 pos; | |
350 | |
351 pos = TranslatePOV(joyinfo.dwPOV); | |
352 if (pos != joystick->hats[0]) { | |
353 SDL_PrivateJoystickHat(joystick, 0, pos); | |
354 } | |
355 } | |
356 } | |
357 | |
358 /* Function to close a joystick after use */ | |
359 void | |
360 SDL_SYS_JoystickClose(SDL_Joystick * joystick) | |
361 { | |
362 if (joystick->hwdata != NULL) { | |
363 /* free system specific hardware data */ | |
364 SDL_free(joystick->hwdata); | |
365 joystick->hwdata = NULL; | |
366 } | |
367 } | |
368 | |
369 /* Function to perform any system-specific joystick related cleanup */ | |
370 void | |
371 SDL_SYS_JoystickQuit(void) | |
372 { | |
373 int i; | |
374 for (i = 0; i < MAX_JOYSTICKS; i++) { | |
375 if (SYS_JoystickName[i] != NULL) { | |
376 SDL_free(SYS_JoystickName[i]); | |
377 SYS_JoystickName[i] = NULL; | |
378 } | |
379 } | |
380 } | |
381 | |
382 | |
383 /* implementation functions */ | |
384 void | |
385 SetMMerror(char *function, int code) | |
386 { | |
387 static char *error; | |
388 static char errbuf[1024]; | |
389 | |
390 errbuf[0] = 0; | |
391 switch (code) { | |
392 case MMSYSERR_NODRIVER: | |
393 error = "Joystick driver not present"; | |
394 break; | |
395 | |
396 case MMSYSERR_INVALPARAM: | |
397 case JOYERR_PARMS: | |
398 error = "Invalid parameter(s)"; | |
399 break; | |
400 | |
401 case MMSYSERR_BADDEVICEID: | |
402 error = "Bad device ID"; | |
403 break; | |
404 | |
405 case JOYERR_UNPLUGGED: | |
406 error = "Joystick not attached"; | |
407 break; | |
408 | |
409 case JOYERR_NOCANDO: | |
410 error = "Can't capture joystick input"; | |
411 break; | |
412 | |
413 default: | |
414 SDL_snprintf(errbuf, SDL_arraysize(errbuf), | |
415 "%s: Unknown Multimedia system error: 0x%x", | |
416 function, code); | |
417 break; | |
418 } | |
419 | |
420 if (!errbuf[0]) { | |
421 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, | |
422 error); | |
423 } | |
424 SDL_SetError("%s", errbuf); | |
425 } | |
426 | |
427 #endif /* SDL_JOYSTICK_WINMM */ | |
428 /* vi: set ts=4 sw=4 expandtab: */ |