Mercurial > sdl-ios-xcode
annotate src/joystick/beos/SDL_bejoystick.cc @ 1479:993ef9ff4688
Updated MacOS X support
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Mar 2006 04:58:30 +0000 |
| parents | 376665398b25 |
| 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 /* This is the system specific header for the SDL joystick API */ | |
| 25 | |
| 26 #include <be/support/String.h> | |
| 27 #include <be/device/Joystick.h> | |
| 28 | |
| 29 extern "C" { | |
| 30 | |
| 31 #include "SDL_joystick.h" | |
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32 #include "../SDL_sysjoystick.h" |
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33 #include "../SDL_joystick_c.h" |
| 0 | 34 |
| 35 | |
| 36 /* The maximum number of joysticks we'll detect */ | |
| 37 #define MAX_JOYSTICKS 16 | |
| 38 | |
| 39 /* A list of available joysticks */ | |
| 40 static char *SDL_joyport[MAX_JOYSTICKS]; | |
| 41 static char *SDL_joyname[MAX_JOYSTICKS]; | |
| 42 | |
| 43 /* The private structure used to keep track of a joystick */ | |
| 44 struct joystick_hwdata { | |
| 45 BJoystick *stick; | |
| 46 uint8 *new_hats; | |
| 47 int16 *new_axes; | |
| 48 }; | |
| 49 | |
| 50 /* Function to scan the system for joysticks. | |
| 51 * This function should set SDL_numjoysticks to the number of available | |
| 52 * joysticks. Joystick 0 should be the system default joystick. | |
| 53 * It should return 0, or -1 on an unrecoverable fatal error. | |
| 54 */ | |
| 55 int SDL_SYS_JoystickInit(void) | |
| 56 { | |
| 57 BJoystick joystick; | |
| 58 int numjoysticks; | |
| 59 int i; | |
| 60 int32 nports; | |
| 61 char name[B_OS_NAME_LENGTH]; | |
| 62 | |
| 63 /* Search for attached joysticks */ | |
| 64 nports = joystick.CountDevices(); | |
| 65 numjoysticks = 0; | |
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66 SDL_memset(SDL_joyport, 0, (sizeof SDL_joyport)); |
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67 SDL_memset(SDL_joyname, 0, (sizeof SDL_joyname)); |
| 0 | 68 for ( i=0; (SDL_numjoysticks < MAX_JOYSTICKS) && (i < nports); ++i ) { |
| 69 if ( joystick.GetDeviceName(i, name) == B_OK ) { | |
| 70 if ( joystick.Open(name) != B_ERROR ) { | |
| 71 BString stick_name; | |
| 72 joystick.GetControllerName(&stick_name); | |
| 73 SDL_joyport[numjoysticks] = strdup(name); | |
| 74 SDL_joyname[numjoysticks] = | |
| 75 strdup(stick_name.String()); | |
| 76 numjoysticks++; | |
| 77 joystick.Close(); | |
| 78 } | |
| 79 } | |
| 80 } | |
| 81 return(numjoysticks); | |
| 82 } | |
| 83 | |
| 84 /* Function to get the device-dependent name of a joystick */ | |
| 85 const char *SDL_SYS_JoystickName(int index) | |
| 86 { | |
| 87 return SDL_joyname[index]; | |
| 88 } | |
| 89 | |
| 90 /* Function to open a joystick for use. | |
| 91 The joystick to open is specified by the index field of the joystick. | |
| 92 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 93 It returns 0, or -1 if there is an error. | |
| 94 */ | |
| 95 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 96 { | |
| 97 BJoystick *stick; | |
| 98 | |
| 99 /* Create the joystick data structure */ | |
| 100 joystick->hwdata = (struct joystick_hwdata *) | |
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101 SDL_malloc(sizeof(*joystick->hwdata)); |
| 0 | 102 if ( joystick->hwdata == NULL ) { |
| 103 SDL_OutOfMemory(); | |
| 104 return(-1); | |
| 105 } | |
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106 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| 0 | 107 stick = new BJoystick; |
| 108 joystick->hwdata->stick = stick; | |
| 109 | |
| 110 /* Open the requested joystick for use */ | |
| 111 if ( stick->Open(SDL_joyport[joystick->index]) == B_ERROR ) { | |
| 112 SDL_SetError("Unable to open joystick"); | |
| 113 SDL_SYS_JoystickClose(joystick); | |
| 114 return(-1); | |
| 115 } | |
| 116 | |
| 117 /* Set the joystick to calibrated mode */ | |
| 118 stick->EnableCalibration(); | |
| 119 | |
| 120 /* Get the number of buttons, hats, and axes on the joystick */ | |
| 121 joystick->nbuttons = stick->CountButtons(); | |
| 122 joystick->naxes = stick->CountAxes(); | |
| 123 joystick->nhats = stick->CountHats(); | |
| 124 | |
| 125 joystick->hwdata->new_axes = (int16 *) | |
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126 SDL_malloc(joystick->naxes*sizeof(int16)); |
| 0 | 127 joystick->hwdata->new_hats = (uint8 *) |
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128 SDL_malloc(joystick->nhats*sizeof(uint8)); |
| 0 | 129 if ( ! joystick->hwdata->new_hats || ! joystick->hwdata->new_axes ) { |
| 130 SDL_OutOfMemory(); | |
| 131 SDL_SYS_JoystickClose(joystick); | |
| 132 return(-1); | |
| 133 } | |
| 134 | |
| 135 /* We're done! */ | |
| 136 return(0); | |
| 137 } | |
| 138 | |
| 139 /* Function to update the state of a joystick - called as a device poll. | |
| 140 * This function shouldn't update the joystick structure directly, | |
| 141 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 142 * and update joystick device state. | |
| 143 */ | |
| 144 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 145 { | |
| 146 static const Uint8 hat_map[9] = { | |
| 147 SDL_HAT_CENTERED, | |
| 148 SDL_HAT_UP, | |
| 149 SDL_HAT_RIGHTUP, | |
| 150 SDL_HAT_RIGHT, | |
| 151 SDL_HAT_RIGHTDOWN, | |
| 152 SDL_HAT_DOWN, | |
| 153 SDL_HAT_LEFTDOWN, | |
| 154 SDL_HAT_LEFT, | |
| 155 SDL_HAT_LEFTUP | |
| 156 }; | |
| 157 const int JITTER = (32768/10); /* 10% jitter threshold (ok?) */ | |
| 158 | |
| 159 BJoystick *stick; | |
| 160 int i, change; | |
| 161 int16 *axes; | |
| 162 uint8 *hats; | |
| 163 uint32 buttons; | |
| 164 | |
| 165 /* Set up data pointers */ | |
| 166 stick = joystick->hwdata->stick; | |
| 167 axes = joystick->hwdata->new_axes; | |
| 168 hats = joystick->hwdata->new_hats; | |
| 169 | |
| 170 /* Get the new joystick state */ | |
| 171 stick->Update(); | |
| 172 stick->GetAxisValues(axes); | |
| 173 stick->GetHatValues(hats); | |
| 174 buttons = stick->ButtonValues(); | |
| 175 | |
| 176 /* Generate axis motion events */ | |
| 177 for ( i=0; i<joystick->naxes; ++i ) { | |
| 178 change = ((int32)axes[i] - joystick->axes[i]); | |
| 179 if ( (change > JITTER) || (change < -JITTER) ) { | |
| 180 SDL_PrivateJoystickAxis(joystick, i, axes[i]); | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 /* Generate hat change events */ | |
| 185 for ( i=0; i<joystick->nhats; ++i ) { | |
| 186 if ( hats[i] != joystick->hats[i] ) { | |
| 187 SDL_PrivateJoystickHat(joystick, i, hat_map[hats[i]]); | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 /* Generate button events */ | |
| 192 for ( i=0; i<joystick->nbuttons; ++i ) { | |
| 193 if ( (buttons&0x01) != joystick->buttons[i] ) { | |
| 194 SDL_PrivateJoystickButton(joystick, i, (buttons&0x01)); | |
| 195 } | |
| 196 buttons >>= 1; | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 /* Function to close a joystick after use */ | |
| 201 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 202 { | |
| 203 if ( joystick->hwdata ) { | |
| 204 joystick->hwdata->stick->Close(); | |
| 205 delete joystick->hwdata->stick; | |
| 206 if ( joystick->hwdata->new_hats ) { | |
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207 SDL_free(joystick->hwdata->new_hats); |
| 0 | 208 } |
| 209 if ( joystick->hwdata->new_axes ) { | |
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210 SDL_free(joystick->hwdata->new_axes); |
| 0 | 211 } |
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212 SDL_free(joystick->hwdata); |
| 0 | 213 joystick->hwdata = NULL; |
| 214 } | |
| 215 } | |
| 216 | |
| 217 /* Function to perform any system-specific joystick related cleanup */ | |
| 218 void SDL_SYS_JoystickQuit(void) | |
| 219 { | |
| 220 int i; | |
| 221 | |
| 222 for ( i=0; SDL_joyport[i]; ++i ) { | |
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223 SDL_free(SDL_joyport[i]); |
| 0 | 224 } |
| 225 SDL_joyport[0] = NULL; | |
| 226 | |
| 227 for ( i=0; SDL_joyname[i]; ++i ) { | |
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228 SDL_free(SDL_joyname[i]); |
| 0 | 229 } |
| 230 SDL_joyname[0] = NULL; | |
| 231 } | |
| 232 | |
| 233 }; // extern "C" |