Mercurial > sdl-ios-xcode
annotate src/joystick/beos/SDL_bejoystick.cc @ 461:1d36f593078a
Date: Thu, 18 Jul 2002 23:51:40 +0200 (MEST)
From: Krister Walfridsson
Subject: [SDL] src/joystick/bsd/SDL_sysjoystick.c patch
The *BSD USB HID joystick code has two serious bugs:
1. If a joystick reports unhandled hid_input usage (for example HUG_RZ or
HUG_DIAL), then the last handled value will be overwritten with an
arbitrary value. (Fixed in the patch below by adding a default case.)
2. The current code does only handle logical coordinates in the range 0-255,
while a big part of available joysticks report -128 - 127. (This is solved
in the patch below by first center the range around 0, and then stretch
it to the correct range.)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 20 Aug 2002 06:08:42 +0000 |
| parents | f6ffac90895c |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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f6ffac90895c
Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
parents:
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
252
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Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
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changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* This is the system specific header for the SDL joystick API */ | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <string.h> | |
| 33 | |
| 34 #include <be/support/String.h> | |
| 35 #include <be/device/Joystick.h> | |
| 36 | |
| 37 extern "C" { | |
| 38 | |
| 39 #include "SDL_error.h" | |
| 40 #include "SDL_joystick.h" | |
| 41 #include "SDL_sysjoystick.h" | |
| 42 #include "SDL_joystick_c.h" | |
| 43 | |
| 44 | |
| 45 /* The maximum number of joysticks we'll detect */ | |
| 46 #define MAX_JOYSTICKS 16 | |
| 47 | |
| 48 /* A list of available joysticks */ | |
| 49 static char *SDL_joyport[MAX_JOYSTICKS]; | |
| 50 static char *SDL_joyname[MAX_JOYSTICKS]; | |
| 51 | |
| 52 /* The private structure used to keep track of a joystick */ | |
| 53 struct joystick_hwdata { | |
| 54 BJoystick *stick; | |
| 55 uint8 *new_hats; | |
| 56 int16 *new_axes; | |
| 57 }; | |
| 58 | |
| 59 /* Function to scan the system for joysticks. | |
| 60 * This function should set SDL_numjoysticks to the number of available | |
| 61 * joysticks. Joystick 0 should be the system default joystick. | |
| 62 * It should return 0, or -1 on an unrecoverable fatal error. | |
| 63 */ | |
| 64 int SDL_SYS_JoystickInit(void) | |
| 65 { | |
| 66 BJoystick joystick; | |
| 67 int numjoysticks; | |
| 68 int i; | |
| 69 int32 nports; | |
| 70 char name[B_OS_NAME_LENGTH]; | |
| 71 | |
| 72 /* Search for attached joysticks */ | |
| 73 nports = joystick.CountDevices(); | |
| 74 numjoysticks = 0; | |
| 75 memset(SDL_joyport, 0, (sizeof SDL_joyport)); | |
| 76 memset(SDL_joyname, 0, (sizeof SDL_joyname)); | |
| 77 for ( i=0; (SDL_numjoysticks < MAX_JOYSTICKS) && (i < nports); ++i ) { | |
| 78 if ( joystick.GetDeviceName(i, name) == B_OK ) { | |
| 79 if ( joystick.Open(name) != B_ERROR ) { | |
| 80 BString stick_name; | |
| 81 joystick.GetControllerName(&stick_name); | |
| 82 SDL_joyport[numjoysticks] = strdup(name); | |
| 83 SDL_joyname[numjoysticks] = | |
| 84 strdup(stick_name.String()); | |
| 85 numjoysticks++; | |
| 86 joystick.Close(); | |
| 87 } | |
| 88 } | |
| 89 } | |
| 90 return(numjoysticks); | |
| 91 } | |
| 92 | |
| 93 /* Function to get the device-dependent name of a joystick */ | |
| 94 const char *SDL_SYS_JoystickName(int index) | |
| 95 { | |
| 96 return SDL_joyname[index]; | |
| 97 } | |
| 98 | |
| 99 /* Function to open a joystick for use. | |
| 100 The joystick to open is specified by the index field of the joystick. | |
| 101 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 102 It returns 0, or -1 if there is an error. | |
| 103 */ | |
| 104 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 105 { | |
| 106 BJoystick *stick; | |
| 107 | |
| 108 /* Create the joystick data structure */ | |
| 109 joystick->hwdata = (struct joystick_hwdata *) | |
| 110 malloc(sizeof(*joystick->hwdata)); | |
| 111 if ( joystick->hwdata == NULL ) { | |
| 112 SDL_OutOfMemory(); | |
| 113 return(-1); | |
| 114 } | |
| 115 memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); | |
| 116 stick = new BJoystick; | |
| 117 joystick->hwdata->stick = stick; | |
| 118 | |
| 119 /* Open the requested joystick for use */ | |
| 120 if ( stick->Open(SDL_joyport[joystick->index]) == B_ERROR ) { | |
| 121 SDL_SetError("Unable to open joystick"); | |
| 122 SDL_SYS_JoystickClose(joystick); | |
| 123 return(-1); | |
| 124 } | |
| 125 | |
| 126 /* Set the joystick to calibrated mode */ | |
| 127 stick->EnableCalibration(); | |
| 128 | |
| 129 /* Get the number of buttons, hats, and axes on the joystick */ | |
| 130 joystick->nbuttons = stick->CountButtons(); | |
| 131 joystick->naxes = stick->CountAxes(); | |
| 132 joystick->nhats = stick->CountHats(); | |
| 133 | |
| 134 joystick->hwdata->new_axes = (int16 *) | |
| 135 malloc(joystick->naxes*sizeof(int16)); | |
| 136 joystick->hwdata->new_hats = (uint8 *) | |
| 137 malloc(joystick->nhats*sizeof(uint8)); | |
| 138 if ( ! joystick->hwdata->new_hats || ! joystick->hwdata->new_axes ) { | |
| 139 SDL_OutOfMemory(); | |
| 140 SDL_SYS_JoystickClose(joystick); | |
| 141 return(-1); | |
| 142 } | |
| 143 | |
| 144 /* We're done! */ | |
| 145 return(0); | |
| 146 } | |
| 147 | |
| 148 /* Function to update the state of a joystick - called as a device poll. | |
| 149 * This function shouldn't update the joystick structure directly, | |
| 150 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 151 * and update joystick device state. | |
| 152 */ | |
| 153 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 154 { | |
| 155 static const Uint8 hat_map[9] = { | |
| 156 SDL_HAT_CENTERED, | |
| 157 SDL_HAT_UP, | |
| 158 SDL_HAT_RIGHTUP, | |
| 159 SDL_HAT_RIGHT, | |
| 160 SDL_HAT_RIGHTDOWN, | |
| 161 SDL_HAT_DOWN, | |
| 162 SDL_HAT_LEFTDOWN, | |
| 163 SDL_HAT_LEFT, | |
| 164 SDL_HAT_LEFTUP | |
| 165 }; | |
| 166 const int JITTER = (32768/10); /* 10% jitter threshold (ok?) */ | |
| 167 | |
| 168 BJoystick *stick; | |
| 169 int i, change; | |
| 170 int16 *axes; | |
| 171 uint8 *hats; | |
| 172 uint32 buttons; | |
| 173 | |
| 174 /* Set up data pointers */ | |
| 175 stick = joystick->hwdata->stick; | |
| 176 axes = joystick->hwdata->new_axes; | |
| 177 hats = joystick->hwdata->new_hats; | |
| 178 | |
| 179 /* Get the new joystick state */ | |
| 180 stick->Update(); | |
| 181 stick->GetAxisValues(axes); | |
| 182 stick->GetHatValues(hats); | |
| 183 buttons = stick->ButtonValues(); | |
| 184 | |
| 185 /* Generate axis motion events */ | |
| 186 for ( i=0; i<joystick->naxes; ++i ) { | |
| 187 change = ((int32)axes[i] - joystick->axes[i]); | |
| 188 if ( (change > JITTER) || (change < -JITTER) ) { | |
| 189 SDL_PrivateJoystickAxis(joystick, i, axes[i]); | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 /* Generate hat change events */ | |
| 194 for ( i=0; i<joystick->nhats; ++i ) { | |
| 195 if ( hats[i] != joystick->hats[i] ) { | |
| 196 SDL_PrivateJoystickHat(joystick, i, hat_map[hats[i]]); | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 /* Generate button events */ | |
| 201 for ( i=0; i<joystick->nbuttons; ++i ) { | |
| 202 if ( (buttons&0x01) != joystick->buttons[i] ) { | |
| 203 SDL_PrivateJoystickButton(joystick, i, (buttons&0x01)); | |
| 204 } | |
| 205 buttons >>= 1; | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 /* Function to close a joystick after use */ | |
| 210 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 211 { | |
| 212 if ( joystick->hwdata ) { | |
| 213 joystick->hwdata->stick->Close(); | |
| 214 delete joystick->hwdata->stick; | |
| 215 if ( joystick->hwdata->new_hats ) { | |
| 216 free(joystick->hwdata->new_hats); | |
| 217 } | |
| 218 if ( joystick->hwdata->new_axes ) { | |
| 219 free(joystick->hwdata->new_axes); | |
| 220 } | |
| 221 free(joystick->hwdata); | |
| 222 joystick->hwdata = NULL; | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 /* Function to perform any system-specific joystick related cleanup */ | |
| 227 void SDL_SYS_JoystickQuit(void) | |
| 228 { | |
| 229 int i; | |
| 230 | |
| 231 for ( i=0; SDL_joyport[i]; ++i ) { | |
| 232 free(SDL_joyport[i]); | |
| 233 } | |
| 234 SDL_joyport[0] = NULL; | |
| 235 | |
| 236 for ( i=0; SDL_joyname[i]; ++i ) { | |
| 237 free(SDL_joyname[i]); | |
| 238 } | |
| 239 SDL_joyname[0] = NULL; | |
| 240 } | |
| 241 | |
| 242 }; // extern "C" |