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 | #ifdef SDL_JOYSTICK_MACOS |
25 | |
26 | /* SDL stuff -- "SDL_sysjoystick.c" |
27 | MacOS joystick functions by Frederick Reitberger |
28 | |
29 | The code that follows is meant for SDL. Use at your own risk. |
30 | */ |
31 | |
32 | #include <InputSprocket.h> |
33 | |
34 | #include "SDL_joystick.h" |
35 | #include "../SDL_sysjoystick.h" |
36 | #include "../SDL_joystick_c.h" |
37 | |
38 | |
39 | /* The max number of joysticks we will detect */ |
40 | #define MAX_JOYSTICKS 16 |
41 | /* Limit ourselves to 32 elements per device */ |
42 | #define kMaxReferences 32 |
43 | |
44 | #define ISpSymmetricAxisToFloat(axis) ((((float) axis) - kISpAxisMiddle) / (kISpAxisMaximum-kISpAxisMiddle)) |
45 | #define ISpAsymmetricAxisToFloat(axis) (((float) axis) / (kISpAxisMaximum)) |
46 | |
47 | |
48 | static ISpDeviceReference SYS_Joysticks[MAX_JOYSTICKS]; |
49 | static ISpElementListReference SYS_Elements[MAX_JOYSTICKS]; |
50 | static ISpDeviceDefinition SYS_DevDef[MAX_JOYSTICKS]; |
51 | |
52 | struct joystick_hwdata |
53 | { |
54 | char name[64]; |
55 | /* Uint8 id;*/ |
56 | ISpElementReference refs[kMaxReferences]; |
57 | /* gonna need some sort of mapping info */ |
58 | }; |
59 | |
60 | |
61 | /* Function to scan the system for joysticks. |
62 | * Joystick 0 should be the system default joystick. |
63 | * This function should return the number of available joysticks, or -1 |
64 | * on an unrecoverable fatal error. |
65 | */ |
66 | int SDL_SYS_JoystickInit(void) |
67 | { |
68 | static ISpDeviceClass classes[4] = { |
69 | kISpDeviceClass_Joystick, |
70 | #if kISpDeviceClass_Gamepad |
71 | kISpDeviceClass_Gamepad, |
72 | #endif |
73 | kISpDeviceClass_Wheel, |
74 | 0 |
75 | }; |
76 | OSErr err; |
77 | int i; |
78 | UInt32 count, numJoysticks; |
79 | |
80 | if ( (Ptr)0 == (Ptr)ISpStartup ) { |
81 | SDL_SetError("InputSprocket not installed"); |
82 | return -1; // InputSprocket not installed |
83 | } |
84 | |
85 | if( (Ptr)0 == (Ptr)ISpGetVersion ) { |
86 | SDL_SetError("InputSprocket not version 1.1 or newer"); |
87 | return -1; // old version of ISp (not at least 1.1) |
88 | } |
89 | |
90 | ISpStartup(); |
91 | |
92 | /* Get all the joysticks */ |
93 | numJoysticks = 0; |
94 | for ( i=0; classes[i]; ++i ) { |
95 | count = 0; |
96 | err = ISpDevices_ExtractByClass( |
97 | classes[i], |
98 | MAX_JOYSTICKS-numJoysticks, |
99 | &count, |
100 | &SYS_Joysticks[numJoysticks]); |
101 | numJoysticks += count; |
102 | } |
103 | |
104 | for(i = 0; i < numJoysticks; i++) |
105 | { |
106 | ISpDevice_GetDefinition( |
107 | SYS_Joysticks[i], sizeof(ISpDeviceDefinition), |
108 | &SYS_DevDef[i]); |
109 | |
110 | err = ISpElementList_New( |
111 | 0, NULL, |
112 | &SYS_Elements[i], 0); |
113 | |
114 | if (err) { |
115 | SDL_OutOfMemory(); |
116 | return -1; |
117 | } |
118 | |
119 | ISpDevice_GetElementList( |
120 | SYS_Joysticks[i], |
121 | &SYS_Elements[i]); |
122 | } |
123 | |
124 | ISpDevices_Deactivate(numJoysticks, SYS_Joysticks); |
125 | |
126 | return numJoysticks; |
127 | } |
128 | |
129 | /* Function to get the device-dependent name of a joystick */ |
130 | const char *SDL_SYS_JoystickName(int index) |
131 | { |
132 | static char name[64]; |
133 | int len; |
134 | |
135 | /* convert pascal string to c-string */ |
136 | len = SYS_DevDef[index].deviceName[0]; |
137 | if ( len >= sizeof(name) ) { |
138 | len = (sizeof(name) - 1); |
139 | } |
140 | SDL_memcpy(name, &SYS_DevDef[index].deviceName[1], len); |
141 | name[len] = '\0'; |
142 | |
143 | return name; |
144 | } |
145 | |
146 | /* Function to open a joystick for use. |
147 | The joystick to open is specified by the index field of the joystick. |
148 | This should fill the nbuttons and naxes fields of the joystick structure. |
149 | It returns 0, or -1 if there is an error. |
150 | */ |
151 | int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) |
152 | { |
153 | int index; |
154 | UInt32 count, gotCount, count2; |
155 | long numAxis, numButtons, numHats, numBalls; |
156 | |
157 | count = kMaxReferences; |
158 | count2 = 0; |
159 | numAxis = numButtons = numHats = numBalls = 0; |
160 | |
161 | index = joystick->index; |
162 | |
163 | /* allocate memory for system specific hardware data */ |
164 | joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
165 | if (joystick->hwdata == NULL) |
166 | { |
167 | SDL_OutOfMemory(); |
168 | return(-1); |
169 | } |
170 | SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
171 | SDL_strlcpy(joystick->hwdata->name, SDL_SYS_JoystickName(index), SDL_arraysize(joystick->hwdata->name)); |
172 | joystick->name = joystick->hwdata->name; |
173 | |
174 | ISpElementList_ExtractByKind( |
175 | SYS_Elements[index], |
176 | kISpElementKind_Axis, |
177 | count, |
178 | &gotCount, |
179 | joystick->hwdata->refs); |
180 | |
181 | numAxis = gotCount; |
182 | count -= gotCount; |
183 | count2 += gotCount; |
184 | |
185 | ISpElementList_ExtractByKind( |
186 | SYS_Elements[index], |
187 | kISpElementKind_DPad, |
188 | count, |
189 | &gotCount, |
190 | &(joystick->hwdata->refs[count2])); |
191 | |
192 | numHats = gotCount; |
193 | count -= gotCount; |
194 | count2 += gotCount; |
195 | |
196 | ISpElementList_ExtractByKind( |
197 | SYS_Elements[index], |
198 | kISpElementKind_Button, |
199 | count, |
200 | &gotCount, |
201 | &(joystick->hwdata->refs[count2])); |
202 | |
203 | numButtons = gotCount; |
204 | count -= gotCount; |
205 | count2 += gotCount; |
206 | |
207 | joystick->naxes = numAxis; |
208 | joystick->nhats = numHats; |
209 | joystick->nballs = numBalls; |
210 | joystick->nbuttons = numButtons; |
211 | |
212 | ISpDevices_Activate( |
213 | 1, |
214 | &SYS_Joysticks[index]); |
215 | |
216 | return 0; |
217 | } |
218 | |
219 | /* Function to update the state of a joystick - called as a device poll. |
220 | * This function shouldn't update the joystick structure directly, |
221 | * but instead should call SDL_PrivateJoystick*() to deliver events |
222 | * and update joystick device state. |
223 | */ |
224 | void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) |
225 | { |
226 | int i, j; |
227 | ISpAxisData a; |
228 | ISpDPadData b; |
229 | //ISpDeltaData c; |
230 | ISpButtonData d; |
231 | |
232 | for(i = 0, j = 0; i < joystick->naxes; i++, j++) |
233 | { |
234 | Sint16 value; |
235 | |
236 | ISpElement_GetSimpleState( |
237 | joystick->hwdata->refs[j], |
238 | &a); |
239 | value = (ISpSymmetricAxisToFloat(a)* 32767.0); |
240 | if ( value != joystick->axes[i] ) { |
241 | SDL_PrivateJoystickAxis(joystick, i, value); |
242 | } |
243 | } |
244 | |
245 | for(i = 0; i < joystick->nhats; i++, j++) |
246 | { |
247 | Uint8 pos; |
248 | |
249 | ISpElement_GetSimpleState( |
250 | joystick->hwdata->refs[j], |
251 | &b); |
252 | switch(b) { |
253 | case kISpPadIdle: |
254 | pos = SDL_HAT_CENTERED; |
255 | break; |
256 | case kISpPadLeft: |
257 | pos = SDL_HAT_LEFT; |
258 | break; |
259 | case kISpPadUpLeft: |
260 | pos = SDL_HAT_LEFTUP; |
261 | break; |
262 | case kISpPadUp: |
263 | pos = SDL_HAT_UP; |
264 | break; |
265 | case kISpPadUpRight: |
266 | pos = SDL_HAT_RIGHTUP; |
267 | break; |
268 | case kISpPadRight: |
269 | pos = SDL_HAT_RIGHT; |
270 | break; |
271 | case kISpPadDownRight: |
272 | pos = SDL_HAT_RIGHTDOWN; |
273 | break; |
274 | case kISpPadDown: |
275 | pos = SDL_HAT_DOWN; |
276 | break; |
277 | case kISpPadDownLeft: |
278 | pos = SDL_HAT_LEFTDOWN; |
279 | break; |
280 | } |
281 | if ( pos != joystick->hats[i] ) { |
282 | SDL_PrivateJoystickHat(joystick, i, pos); |
283 | } |
284 | } |
285 | |
286 | for(i = 0; i < joystick->nballs; i++, j++) |
287 | { |
288 | /* ignore balls right now */ |
289 | } |
290 | |
291 | for(i = 0; i < joystick->nbuttons; i++, j++) |
292 | { |
293 | ISpElement_GetSimpleState( |
294 | joystick->hwdata->refs[j], |
295 | &d); |
296 | if ( d != joystick->buttons[i] ) { |
297 | SDL_PrivateJoystickButton(joystick, i, d); |
298 | } |
299 | } |
300 | } |
301 | |
302 | /* Function to close a joystick after use */ |
303 | void SDL_SYS_JoystickClose(SDL_Joystick *joystick) |
304 | { |
305 | int index; |
306 | |
307 | index = joystick->index; |
308 | |
309 | ISpDevices_Deactivate( |
310 | 1, |
311 | &SYS_Joysticks[index]); |
312 | } |
313 | |
314 | /* Function to perform any system-specific joystick related cleanup */ |
315 | void SDL_SYS_JoystickQuit(void) |
316 | { |
317 | ISpShutdown(); |
318 | } |
319 | |
320 | #endif /* SDL_JOYSTICK_MACOS */ |