Mercurial > sdl-ios-xcode
annotate src/joystick/win32/SDL_mmjoystick.c @ 1358:c71e05b4dc2e
More header massaging... works great on Windows. ;-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 06:48:43 +0000 |
| parents | 604d73db6802 |
| children | 19418e4422cb |
| 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 */ |
| 22 | |
| 23 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */ | |
| 24 | |
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25 #include "SDL_windows.h" |
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26 #include <mmsystem.h> |
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27 #include <regstr.h> |
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28 |
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29 #include "SDL_events.h" |
| 0 | 30 #include "SDL_joystick.h" |
| 31 #include "SDL_sysjoystick.h" | |
| 32 #include "SDL_joystick_c.h" | |
| 33 | |
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34 #define MAX_JOYSTICKS 16 |
| 0 | 35 #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
| 36 #define MAX_BUTTONS 32 /* and 32 buttons */ | |
| 37 #define AXIS_MIN -32768 /* minimum value for axis coordinate */ | |
| 38 #define AXIS_MAX 32767 /* maximum value for axis coordinate */ | |
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39 /* limit axis to 256 possible positions to filter out noise */ |
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40 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) |
| 0 | 41 #define JOY_BUTTON_FLAG(n) (1<<n) |
| 42 | |
| 43 | |
| 44 /* array to hold joystick ID values */ | |
| 45 static UINT SYS_JoystickID[MAX_JOYSTICKS]; | |
| 46 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS]; | |
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47 static char *SYS_JoystickName[MAX_JOYSTICKS]; |
| 0 | 48 |
| 49 /* The private structure used to keep track of a joystick */ | |
| 50 struct joystick_hwdata | |
| 51 { | |
| 52 /* joystick ID */ | |
| 53 UINT id; | |
| 54 | |
| 55 /* values used to translate device-specific coordinates into | |
| 56 SDL-standard ranges */ | |
| 57 struct _transaxis { | |
| 58 int offset; | |
| 59 float scale; | |
| 60 } transaxis[6]; | |
| 61 }; | |
| 62 | |
| 63 /* Convert a win32 Multimedia API return code to a text message */ | |
| 64 static void SetMMerror(char *function, int code); | |
| 65 | |
| 66 | |
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67 static char *GetJoystickName(int index, const char *szRegKey) |
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68 { |
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69 /* added 7/24/2004 by Eckhard Stolberg */ |
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70 /* |
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71 see if there is a joystick for the current |
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72 index (1-16) listed in the registry |
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73 */ |
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74 char *name = NULL; |
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75 HKEY hKey; |
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76 DWORD regsize; |
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77 LONG regresult; |
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78 unsigned char regkey[256]; |
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79 unsigned char regvalue[256]; |
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80 unsigned char regname[256]; |
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81 |
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82 SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s\\%s", |
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83 REGSTR_PATH_JOYCONFIG, |
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84 szRegKey, |
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85 REGSTR_KEY_JOYCURR); |
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86 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE, |
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87 (LPTSTR) ®key, 0, KEY_READ, &hKey); |
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88 if (regresult == ERROR_SUCCESS) |
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89 { |
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90 /* |
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91 find the registry key name for the |
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92 joystick's properties |
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93 */ |
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94 regsize = sizeof(regname); |
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95 SDL_snprintf((char *) regvalue, SDL_arraysize(regvalue), |
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96 "Joystick%d%s", index+1, |
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97 REGSTR_VAL_JOYOEMNAME); |
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98 regresult = RegQueryValueExA(hKey, |
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99 (char *) regvalue, 0, 0, (LPBYTE) ®name, |
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100 (LPDWORD) ®size); |
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101 RegCloseKey(hKey); |
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102 if (regresult == ERROR_SUCCESS) |
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103 { |
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104 /* open that registry key */ |
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105 SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s", |
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106 REGSTR_PATH_JOYOEM, regname); |
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107 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE, |
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108 (char *) regkey, 0, KEY_READ, &hKey); |
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109 if (regresult == ERROR_SUCCESS) |
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110 { |
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111 /* find the size for the OEM name text */ |
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112 regsize = sizeof(regvalue); |
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113 regresult = |
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114 RegQueryValueExA(hKey, |
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115 REGSTR_VAL_JOYOEMNAME, |
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116 0, 0, NULL, |
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117 (LPDWORD) ®size); |
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118 if (regresult == ERROR_SUCCESS) |
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119 { |
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120 /* |
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121 allocate enough memory |
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122 for the OEM name text ... |
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123 */ |
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124 name = (char *) SDL_malloc(regsize); |
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125 /* ... and read it from the registry */ |
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126 regresult = |
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127 RegQueryValueExA(hKey, |
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128 REGSTR_VAL_JOYOEMNAME, 0, 0, |
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129 (LPBYTE) name, |
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130 (LPDWORD) ®size); |
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131 RegCloseKey(hKey); |
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132 } |
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133 } |
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134 } |
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135 } |
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136 return(name); |
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137 } |
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138 |
| 0 | 139 /* Function to scan the system for joysticks. |
| 140 * This function should set SDL_numjoysticks to the number of available | |
| 141 * joysticks. Joystick 0 should be the system default joystick. | |
| 142 * It should return 0, or -1 on an unrecoverable fatal error. | |
| 143 */ | |
| 144 int SDL_SYS_JoystickInit(void) | |
| 145 { | |
| 146 int i; | |
| 147 int maxdevs; | |
| 148 int numdevs; | |
| 149 JOYINFOEX joyinfo; | |
| 150 JOYCAPS joycaps; | |
| 151 MMRESULT result; | |
| 152 | |
| 153 numdevs = 0; | |
| 154 maxdevs = joyGetNumDevs(); | |
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155 |
| 0 | 156 if ( maxdevs > MAX_JOYSTICKS ) { |
| 157 maxdevs = MAX_JOYSTICKS; | |
| 158 } | |
| 159 | |
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160 |
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161 for ( i = 0; i < MAX_JOYSTICKS; i++ ) { |
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162 SYS_JoystickID[i] = JOYSTICKID1 + i; |
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163 SYS_JoystickName[i] = NULL; |
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164 } |
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165 |
| 0 | 166 |
| 167 for ( i = 0; (i < maxdevs); ++i ) { | |
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168 |
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169 /* added 8/31/2001 By Vitaliy Mikitchenko */ |
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170 joyinfo.dwSize = sizeof(joyinfo); |
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171 joyinfo.dwFlags = JOY_RETURNALL; |
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172 /* end addition */ |
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173 |
| 0 | 174 result = joyGetPosEx(SYS_JoystickID[i], &joyinfo); |
| 175 if ( result == JOYERR_NOERROR ) { | |
| 176 result = joyGetDevCaps(SYS_JoystickID[i], &joycaps, sizeof(joycaps)); | |
| 177 if ( result == JOYERR_NOERROR ) { | |
| 178 SYS_JoystickID[numdevs] = SYS_JoystickID[i]; | |
| 179 SYS_Joystick[numdevs] = joycaps; | |
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180 SYS_JoystickName[numdevs] = GetJoystickName(numdevs, joycaps.szRegKey); |
| 0 | 181 numdevs++; |
| 182 } | |
| 183 } | |
| 184 } | |
| 185 return(numdevs); | |
| 186 } | |
| 187 | |
| 188 /* Function to get the device-dependent name of a joystick */ | |
| 189 const char *SDL_SYS_JoystickName(int index) | |
| 190 { | |
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191 if ( SYS_JoystickName[index] != NULL ) { |
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192 return(SYS_JoystickName[index]); |
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193 } else { |
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194 return(SYS_Joystick[index].szPname); |
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195 } |
| 0 | 196 } |
| 197 | |
| 198 /* Function to open a joystick for use. | |
| 199 The joystick to open is specified by the index field of the joystick. | |
| 200 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 201 It returns 0, or -1 if there is an error. | |
| 202 */ | |
| 203 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 204 { | |
| 205 int index, i; | |
| 206 int caps_flags[MAX_AXES-2] = | |
| 207 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV }; | |
| 208 int axis_min[MAX_AXES], axis_max[MAX_AXES]; | |
| 209 | |
| 210 | |
| 211 /* shortcut */ | |
| 212 index = joystick->index; | |
| 213 axis_min[0] = SYS_Joystick[index].wXmin; | |
| 214 axis_max[0] = SYS_Joystick[index].wXmax; | |
| 215 axis_min[1] = SYS_Joystick[index].wYmin; | |
| 216 axis_max[1] = SYS_Joystick[index].wYmax; | |
| 217 axis_min[2] = SYS_Joystick[index].wZmin; | |
| 218 axis_max[2] = SYS_Joystick[index].wZmax; | |
| 219 axis_min[3] = SYS_Joystick[index].wRmin; | |
| 220 axis_max[3] = SYS_Joystick[index].wRmax; | |
| 221 axis_min[4] = SYS_Joystick[index].wUmin; | |
| 222 axis_max[4] = SYS_Joystick[index].wUmax; | |
| 223 axis_min[5] = SYS_Joystick[index].wVmin; | |
| 224 axis_max[5] = SYS_Joystick[index].wVmax; | |
| 225 | |
| 226 /* allocate memory for system specific hardware data */ | |
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227 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| 0 | 228 if (joystick->hwdata == NULL) |
| 229 { | |
| 230 SDL_OutOfMemory(); | |
| 231 return(-1); | |
| 232 } | |
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233 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| 0 | 234 |
| 235 /* set hardware data */ | |
| 236 joystick->hwdata->id = SYS_JoystickID[index]; | |
| 237 for ( i = 0; i < MAX_AXES; ++i ) { | |
| 238 if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) { | |
| 239 joystick->hwdata->transaxis[i].offset = | |
| 240 AXIS_MIN - axis_min[i]; | |
| 241 joystick->hwdata->transaxis[i].scale = | |
| 242 (float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]); | |
| 243 } else { | |
| 244 joystick->hwdata->transaxis[i].offset = 0; | |
| 245 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */ | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 /* fill nbuttons, naxes, and nhats fields */ | |
| 250 joystick->nbuttons = SYS_Joystick[index].wNumButtons; | |
| 251 joystick->naxes = SYS_Joystick[index].wNumAxes; | |
| 252 if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) { | |
| 253 joystick->nhats = 1; | |
| 254 } else { | |
| 255 joystick->nhats = 0; | |
| 256 } | |
| 257 return(0); | |
| 258 } | |
| 259 | |
| 260 static Uint8 TranslatePOV(DWORD value) | |
| 261 { | |
| 262 Uint8 pos; | |
| 263 | |
| 264 pos = SDL_HAT_CENTERED; | |
| 265 if ( value != JOY_POVCENTERED ) { | |
| 266 if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) { | |
| 267 pos |= SDL_HAT_UP; | |
| 268 } | |
| 269 if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) { | |
| 270 pos |= SDL_HAT_RIGHT; | |
| 271 } | |
| 272 if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) { | |
| 273 pos |= SDL_HAT_DOWN; | |
| 274 } | |
| 275 if ( value > JOY_POVBACKWARD ) { | |
| 276 pos |= SDL_HAT_LEFT; | |
| 277 } | |
| 278 } | |
| 279 return(pos); | |
| 280 } | |
| 281 | |
| 282 /* Function to update the state of a joystick - called as a device poll. | |
| 283 * This function shouldn't update the joystick structure directly, | |
| 284 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 285 * and update joystick device state. | |
| 286 */ | |
| 287 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 288 { | |
| 289 MMRESULT result; | |
| 290 int i; | |
| 291 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ, | |
| 292 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV }; | |
| 293 DWORD pos[MAX_AXES]; | |
| 294 struct _transaxis *transaxis; | |
| 295 int value, change; | |
| 296 JOYINFOEX joyinfo; | |
| 297 | |
| 298 joyinfo.dwSize = sizeof(joyinfo); | |
| 299 joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS; | |
| 300 if ( ! joystick->hats ) { | |
| 301 joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS); | |
| 302 } | |
| 303 result = joyGetPosEx(joystick->hwdata->id, &joyinfo); | |
| 304 if ( result != JOYERR_NOERROR ) { | |
| 305 SetMMerror("joyGetPosEx", result); | |
| 306 return; | |
| 307 } | |
| 308 | |
| 309 /* joystick motion events */ | |
| 310 pos[0] = joyinfo.dwXpos; | |
| 311 pos[1] = joyinfo.dwYpos; | |
| 312 pos[2] = joyinfo.dwZpos; | |
| 313 pos[3] = joyinfo.dwRpos; | |
| 314 pos[4] = joyinfo.dwUpos; | |
| 315 pos[5] = joyinfo.dwVpos; | |
| 316 | |
| 317 transaxis = joystick->hwdata->transaxis; | |
| 318 for (i = 0; i < joystick->naxes; i++) { | |
| 319 if (joyinfo.dwFlags & flags[i]) { | |
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320 value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale); |
| 0 | 321 change = (value - joystick->axes[i]); |
| 322 if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) { | |
| 323 SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value); | |
| 324 } | |
| 325 } | |
| 326 } | |
| 327 | |
| 328 /* joystick button events */ | |
| 329 if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) { | |
| 330 for ( i = 0; i < joystick->nbuttons; ++i ) { | |
| 331 if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) { | |
| 332 if ( ! joystick->buttons[i] ) { | |
| 333 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED); | |
| 334 } | |
| 335 } else { | |
| 336 if ( joystick->buttons[i] ) { | |
| 337 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED); | |
| 338 } | |
| 339 } | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 /* joystick hat events */ | |
| 344 if ( joyinfo.dwFlags & JOY_RETURNPOV ) { | |
| 345 Uint8 pos; | |
| 346 | |
| 347 pos = TranslatePOV(joyinfo.dwPOV); | |
| 348 if ( pos != joystick->hats[0] ) { | |
| 349 SDL_PrivateJoystickHat(joystick, 0, pos); | |
| 350 } | |
| 351 } | |
| 352 } | |
| 353 | |
| 354 /* Function to close a joystick after use */ | |
| 355 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 356 { | |
| 357 if (joystick->hwdata != NULL) { | |
| 358 /* free system specific hardware data */ | |
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359 SDL_free(joystick->hwdata); |
| 0 | 360 } |
| 361 } | |
| 362 | |
| 363 /* Function to perform any system-specific joystick related cleanup */ | |
| 364 void SDL_SYS_JoystickQuit(void) | |
| 365 { | |
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366 int i; |
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367 for (i = 0; i < MAX_JOYSTICKS; i++) { |
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368 if ( SYS_JoystickName[i] != NULL ) { |
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369 SDL_free(SYS_JoystickName[i]); |
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370 } |
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371 } |
| 0 | 372 } |
| 373 | |
| 374 | |
| 375 /* implementation functions */ | |
| 376 void SetMMerror(char *function, int code) | |
| 377 { | |
| 378 static char *error; | |
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379 static char errbuf[1024]; |
| 0 | 380 |
| 381 errbuf[0] = 0; | |
| 382 switch (code) | |
| 383 { | |
| 384 case MMSYSERR_NODRIVER: | |
| 385 error = "Joystick driver not present"; | |
| 386 break; | |
| 387 | |
| 388 case MMSYSERR_INVALPARAM: | |
| 389 case JOYERR_PARMS: | |
| 390 error = "Invalid parameter(s)"; | |
| 391 break; | |
| 392 | |
| 393 case MMSYSERR_BADDEVICEID: | |
| 394 error = "Bad device ID"; | |
| 395 break; | |
| 396 | |
| 397 case JOYERR_UNPLUGGED: | |
| 398 error = "Joystick not attached"; | |
| 399 break; | |
| 400 | |
| 401 case JOYERR_NOCANDO: | |
| 402 error = "Can't capture joystick input"; | |
| 403 break; | |
| 404 | |
| 405 default: | |
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406 SDL_snprintf(errbuf, SDL_arraysize(errbuf), |
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407 "%s: Unknown Multimedia system error: 0x%x", |
| 0 | 408 function, code); |
| 409 break; | |
| 410 } | |
| 411 | |
| 412 if ( ! errbuf[0] ) { | |
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413 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error); |
| 0 | 414 } |
| 415 SDL_SetError("%s", errbuf); | |
| 416 } |