Mercurial > sdl-ios-xcode
annotate src/joystick/macos/SDL_sysjoystick.c @ 4017:9a451f59b388 SDL-1.2
This looks like it might hit Bugzilla #441, too, so we'll play it safe.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 08 Jul 2007 01:55:46 +0000 |
| parents | 92947e3a18db |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
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24 #ifdef SDL_JOYSTICK_MACOS |
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25 |
| 0 | 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" | |
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35 #include "../SDL_sysjoystick.h" |
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36 #include "../SDL_joystick_c.h" |
| 0 | 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, | |
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70 #if kISpDeviceClass_Gamepad |
| 0 | 71 kISpDeviceClass_Gamepad, |
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72 #endif |
| 0 | 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 } | |
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140 SDL_memcpy(name, &SYS_DevDef[index].deviceName[1], len); |
| 0 | 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 */ | |
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164 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| 0 | 165 if (joystick->hwdata == NULL) |
| 166 { | |
| 167 SDL_OutOfMemory(); | |
| 168 return(-1); | |
| 169 } | |
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170 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
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171 SDL_strlcpy(joystick->hwdata->name, SDL_SYS_JoystickName(index), SDL_arraysize(joystick->hwdata->name)); |
| 0 | 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 | |
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320 #endif /* SDL_JOYSTICK_MACOS */ |