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annotate src/joystick/macos/SDL_sysjoystick.c @ 1502:d403a39389da
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 13 Mar 2006 01:16:16 +0000 |
| parents | d910939febfa |
| children | 92947e3a18db |
| 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 |
| 24 /* SDL stuff -- "SDL_sysjoystick.c" | |
| 25 MacOS joystick functions by Frederick Reitberger | |
| 26 | |
| 27 The code that follows is meant for SDL. Use at your own risk. | |
| 28 */ | |
| 29 | |
| 30 #include <InputSprocket.h> | |
| 31 | |
| 32 #include "SDL_joystick.h" | |
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33 #include "../SDL_sysjoystick.h" |
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34 #include "../SDL_joystick_c.h" |
| 0 | 35 |
| 36 | |
| 37 /* The max number of joysticks we will detect */ | |
| 38 #define MAX_JOYSTICKS 16 | |
| 39 /* Limit ourselves to 32 elements per device */ | |
| 40 #define kMaxReferences 32 | |
| 41 | |
| 42 #define ISpSymmetricAxisToFloat(axis) ((((float) axis) - kISpAxisMiddle) / (kISpAxisMaximum-kISpAxisMiddle)) | |
| 43 #define ISpAsymmetricAxisToFloat(axis) (((float) axis) / (kISpAxisMaximum)) | |
| 44 | |
| 45 | |
| 46 static ISpDeviceReference SYS_Joysticks[MAX_JOYSTICKS]; | |
| 47 static ISpElementListReference SYS_Elements[MAX_JOYSTICKS]; | |
| 48 static ISpDeviceDefinition SYS_DevDef[MAX_JOYSTICKS]; | |
| 49 | |
| 50 struct joystick_hwdata | |
| 51 { | |
| 52 char name[64]; | |
| 53 /* Uint8 id;*/ | |
| 54 ISpElementReference refs[kMaxReferences]; | |
| 55 /* gonna need some sort of mapping info */ | |
| 56 }; | |
| 57 | |
| 58 | |
| 59 /* Function to scan the system for joysticks. | |
| 60 * Joystick 0 should be the system default joystick. | |
| 61 * This function should return the number of available joysticks, or -1 | |
| 62 * on an unrecoverable fatal error. | |
| 63 */ | |
| 64 int SDL_SYS_JoystickInit(void) | |
| 65 { | |
| 66 static ISpDeviceClass classes[4] = { | |
| 67 kISpDeviceClass_Joystick, | |
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68 #if kISpDeviceClass_Gamepad |
| 0 | 69 kISpDeviceClass_Gamepad, |
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70 #endif |
| 0 | 71 kISpDeviceClass_Wheel, |
| 72 0 | |
| 73 }; | |
| 74 OSErr err; | |
| 75 int i; | |
| 76 UInt32 count, numJoysticks; | |
| 77 | |
| 78 if ( (Ptr)0 == (Ptr)ISpStartup ) { | |
| 79 SDL_SetError("InputSprocket not installed"); | |
| 80 return -1; // InputSprocket not installed | |
| 81 } | |
| 82 | |
| 83 if( (Ptr)0 == (Ptr)ISpGetVersion ) { | |
| 84 SDL_SetError("InputSprocket not version 1.1 or newer"); | |
| 85 return -1; // old version of ISp (not at least 1.1) | |
| 86 } | |
| 87 | |
| 88 ISpStartup(); | |
| 89 | |
| 90 /* Get all the joysticks */ | |
| 91 numJoysticks = 0; | |
| 92 for ( i=0; classes[i]; ++i ) { | |
| 93 count = 0; | |
| 94 err = ISpDevices_ExtractByClass( | |
| 95 classes[i], | |
| 96 MAX_JOYSTICKS-numJoysticks, | |
| 97 &count, | |
| 98 &SYS_Joysticks[numJoysticks]); | |
| 99 numJoysticks += count; | |
| 100 } | |
| 101 | |
| 102 for(i = 0; i < numJoysticks; i++) | |
| 103 { | |
| 104 ISpDevice_GetDefinition( | |
| 105 SYS_Joysticks[i], sizeof(ISpDeviceDefinition), | |
| 106 &SYS_DevDef[i]); | |
| 107 | |
| 108 err = ISpElementList_New( | |
| 109 0, NULL, | |
| 110 &SYS_Elements[i], 0); | |
| 111 | |
| 112 if (err) { | |
| 113 SDL_OutOfMemory(); | |
| 114 return -1; | |
| 115 } | |
| 116 | |
| 117 ISpDevice_GetElementList( | |
| 118 SYS_Joysticks[i], | |
| 119 &SYS_Elements[i]); | |
| 120 } | |
| 121 | |
| 122 ISpDevices_Deactivate(numJoysticks, SYS_Joysticks); | |
| 123 | |
| 124 return numJoysticks; | |
| 125 } | |
| 126 | |
| 127 /* Function to get the device-dependent name of a joystick */ | |
| 128 const char *SDL_SYS_JoystickName(int index) | |
| 129 { | |
| 130 static char name[64]; | |
| 131 int len; | |
| 132 | |
| 133 /* convert pascal string to c-string */ | |
| 134 len = SYS_DevDef[index].deviceName[0]; | |
| 135 if ( len >= sizeof(name) ) { | |
| 136 len = (sizeof(name) - 1); | |
| 137 } | |
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138 SDL_memcpy(name, &SYS_DevDef[index].deviceName[1], len); |
| 0 | 139 name[len] = '\0'; |
| 140 | |
| 141 return name; | |
| 142 } | |
| 143 | |
| 144 /* Function to open a joystick for use. | |
| 145 The joystick to open is specified by the index field of the joystick. | |
| 146 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 147 It returns 0, or -1 if there is an error. | |
| 148 */ | |
| 149 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 150 { | |
| 151 int index; | |
| 152 UInt32 count, gotCount, count2; | |
| 153 long numAxis, numButtons, numHats, numBalls; | |
| 154 | |
| 155 count = kMaxReferences; | |
| 156 count2 = 0; | |
| 157 numAxis = numButtons = numHats = numBalls = 0; | |
| 158 | |
| 159 index = joystick->index; | |
| 160 | |
| 161 /* allocate memory for system specific hardware data */ | |
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162 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| 0 | 163 if (joystick->hwdata == NULL) |
| 164 { | |
| 165 SDL_OutOfMemory(); | |
| 166 return(-1); | |
| 167 } | |
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168 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
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169 SDL_strlcpy(joystick->hwdata->name, SDL_SYS_JoystickName(index), SDL_arraysize(joystick->hwdata->name)); |
| 0 | 170 joystick->name = joystick->hwdata->name; |
| 171 | |
| 172 ISpElementList_ExtractByKind( | |
| 173 SYS_Elements[index], | |
| 174 kISpElementKind_Axis, | |
| 175 count, | |
| 176 &gotCount, | |
| 177 joystick->hwdata->refs); | |
| 178 | |
| 179 numAxis = gotCount; | |
| 180 count -= gotCount; | |
| 181 count2 += gotCount; | |
| 182 | |
| 183 ISpElementList_ExtractByKind( | |
| 184 SYS_Elements[index], | |
| 185 kISpElementKind_DPad, | |
| 186 count, | |
| 187 &gotCount, | |
| 188 &(joystick->hwdata->refs[count2])); | |
| 189 | |
| 190 numHats = gotCount; | |
| 191 count -= gotCount; | |
| 192 count2 += gotCount; | |
| 193 | |
| 194 ISpElementList_ExtractByKind( | |
| 195 SYS_Elements[index], | |
| 196 kISpElementKind_Button, | |
| 197 count, | |
| 198 &gotCount, | |
| 199 &(joystick->hwdata->refs[count2])); | |
| 200 | |
| 201 numButtons = gotCount; | |
| 202 count -= gotCount; | |
| 203 count2 += gotCount; | |
| 204 | |
| 205 joystick->naxes = numAxis; | |
| 206 joystick->nhats = numHats; | |
| 207 joystick->nballs = numBalls; | |
| 208 joystick->nbuttons = numButtons; | |
| 209 | |
| 210 ISpDevices_Activate( | |
| 211 1, | |
| 212 &SYS_Joysticks[index]); | |
| 213 | |
| 214 return 0; | |
| 215 } | |
| 216 | |
| 217 /* Function to update the state of a joystick - called as a device poll. | |
| 218 * This function shouldn't update the joystick structure directly, | |
| 219 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 220 * and update joystick device state. | |
| 221 */ | |
| 222 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 223 { | |
| 224 int i, j; | |
| 225 ISpAxisData a; | |
| 226 ISpDPadData b; | |
| 227 //ISpDeltaData c; | |
| 228 ISpButtonData d; | |
| 229 | |
| 230 for(i = 0, j = 0; i < joystick->naxes; i++, j++) | |
| 231 { | |
| 232 Sint16 value; | |
| 233 | |
| 234 ISpElement_GetSimpleState( | |
| 235 joystick->hwdata->refs[j], | |
| 236 &a); | |
| 237 value = (ISpSymmetricAxisToFloat(a)* 32767.0); | |
| 238 if ( value != joystick->axes[i] ) { | |
| 239 SDL_PrivateJoystickAxis(joystick, i, value); | |
| 240 } | |
| 241 } | |
| 242 | |
| 243 for(i = 0; i < joystick->nhats; i++, j++) | |
| 244 { | |
| 245 Uint8 pos; | |
| 246 | |
| 247 ISpElement_GetSimpleState( | |
| 248 joystick->hwdata->refs[j], | |
| 249 &b); | |
| 250 switch(b) { | |
| 251 case kISpPadIdle: | |
| 252 pos = SDL_HAT_CENTERED; | |
| 253 break; | |
| 254 case kISpPadLeft: | |
| 255 pos = SDL_HAT_LEFT; | |
| 256 break; | |
| 257 case kISpPadUpLeft: | |
| 258 pos = SDL_HAT_LEFTUP; | |
| 259 break; | |
| 260 case kISpPadUp: | |
| 261 pos = SDL_HAT_UP; | |
| 262 break; | |
| 263 case kISpPadUpRight: | |
| 264 pos = SDL_HAT_RIGHTUP; | |
| 265 break; | |
| 266 case kISpPadRight: | |
| 267 pos = SDL_HAT_RIGHT; | |
| 268 break; | |
| 269 case kISpPadDownRight: | |
| 270 pos = SDL_HAT_RIGHTDOWN; | |
| 271 break; | |
| 272 case kISpPadDown: | |
| 273 pos = SDL_HAT_DOWN; | |
| 274 break; | |
| 275 case kISpPadDownLeft: | |
| 276 pos = SDL_HAT_LEFTDOWN; | |
| 277 break; | |
| 278 } | |
| 279 if ( pos != joystick->hats[i] ) { | |
| 280 SDL_PrivateJoystickHat(joystick, i, pos); | |
| 281 } | |
| 282 } | |
| 283 | |
| 284 for(i = 0; i < joystick->nballs; i++, j++) | |
| 285 { | |
| 286 /* ignore balls right now */ | |
| 287 } | |
| 288 | |
| 289 for(i = 0; i < joystick->nbuttons; i++, j++) | |
| 290 { | |
| 291 ISpElement_GetSimpleState( | |
| 292 joystick->hwdata->refs[j], | |
| 293 &d); | |
| 294 if ( d != joystick->buttons[i] ) { | |
| 295 SDL_PrivateJoystickButton(joystick, i, d); | |
| 296 } | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 /* Function to close a joystick after use */ | |
| 301 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 302 { | |
| 303 int index; | |
| 304 | |
| 305 index = joystick->index; | |
| 306 | |
| 307 ISpDevices_Deactivate( | |
| 308 1, | |
| 309 &SYS_Joysticks[index]); | |
| 310 } | |
| 311 | |
| 312 /* Function to perform any system-specific joystick related cleanup */ | |
| 313 void SDL_SYS_JoystickQuit(void) | |
| 314 { | |
| 315 ISpShutdown(); | |
| 316 } | |
| 317 |