Mercurial > sdl-ios-xcode
annotate src/joystick/win32/SDL_mmjoystick.c @ 4097:c5169b89787f SDL-1.2
Removed stray C++ comment
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 28 Dec 2007 07:50:01 +0000 |
| parents | 209a3ef8a328 |
| children | 96ce26f24b01 |
| 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_WINMM |
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25 |
| 0 | 26 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */ |
| 27 | |
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28 #define WIN32_LEAN_AND_MEAN |
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29 #include <windows.h> |
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30 #include <mmsystem.h> |
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31 #include <regstr.h> |
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32 |
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33 #include "SDL_events.h" |
| 0 | 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 |
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38 #define MAX_JOYSTICKS 16 |
| 0 | 39 #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
| 40 #define MAX_BUTTONS 32 /* and 32 buttons */ | |
| 41 #define AXIS_MIN -32768 /* minimum value for axis coordinate */ | |
| 42 #define AXIS_MAX 32767 /* maximum value for axis coordinate */ | |
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43 /* limit axis to 256 possible positions to filter out noise */ |
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44 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) |
| 0 | 45 #define JOY_BUTTON_FLAG(n) (1<<n) |
| 46 | |
| 47 | |
| 48 /* array to hold joystick ID values */ | |
| 49 static UINT SYS_JoystickID[MAX_JOYSTICKS]; | |
| 50 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS]; | |
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51 static char *SYS_JoystickName[MAX_JOYSTICKS]; |
| 0 | 52 |
| 53 /* The private structure used to keep track of a joystick */ | |
| 54 struct joystick_hwdata | |
| 55 { | |
| 56 /* joystick ID */ | |
| 57 UINT id; | |
| 58 | |
| 59 /* values used to translate device-specific coordinates into | |
| 60 SDL-standard ranges */ | |
| 61 struct _transaxis { | |
| 62 int offset; | |
| 63 float scale; | |
| 64 } transaxis[6]; | |
| 65 }; | |
| 66 | |
| 67 /* Convert a win32 Multimedia API return code to a text message */ | |
| 68 static void SetMMerror(char *function, int code); | |
| 69 | |
| 70 | |
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71 static char *GetJoystickName(int index, const char *szRegKey) |
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72 { |
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73 /* added 7/24/2004 by Eckhard Stolberg */ |
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74 /* |
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75 see if there is a joystick for the current |
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76 index (1-16) listed in the registry |
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77 */ |
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78 char *name = NULL; |
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79 HKEY hTopKey; |
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80 HKEY hKey; |
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81 DWORD regsize; |
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82 LONG regresult; |
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83 char regkey[256]; |
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84 char regvalue[256]; |
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85 char regname[256]; |
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86 |
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87 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s\\%s", |
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88 REGSTR_PATH_JOYCONFIG, szRegKey, REGSTR_KEY_JOYCURR); |
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89 hTopKey = HKEY_LOCAL_MACHINE; |
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90 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); |
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91 if (regresult != ERROR_SUCCESS) { |
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92 hTopKey = HKEY_CURRENT_USER; |
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93 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); |
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94 } |
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95 if (regresult != ERROR_SUCCESS) { |
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96 return NULL; |
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97 } |
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98 |
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99 /* find the registry key name for the joystick's properties */ |
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100 regsize = sizeof(regname); |
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101 SDL_snprintf(regvalue, SDL_arraysize(regvalue), "Joystick%d%s", index+1, REGSTR_VAL_JOYOEMNAME); |
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102 regresult = RegQueryValueExA(hKey, regvalue, 0, 0, (LPBYTE)regname, ®size); |
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103 RegCloseKey(hKey); |
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104 |
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105 if (regresult != ERROR_SUCCESS) { |
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106 return NULL; |
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107 } |
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108 |
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109 /* open that registry key */ |
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110 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s", REGSTR_PATH_JOYOEM, regname); |
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111 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); |
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112 if (regresult != ERROR_SUCCESS) { |
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113 return NULL; |
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114 } |
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115 |
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116 /* find the size for the OEM name text */ |
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117 regsize = sizeof(regvalue); |
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118 regresult = RegQueryValueExA(hKey, REGSTR_VAL_JOYOEMNAME, 0, 0, NULL, ®size); |
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119 if (regresult == ERROR_SUCCESS) { |
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120 /* allocate enough memory for the OEM name text ... */ |
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121 name = (char *) SDL_malloc(regsize); |
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122 if ( name ) { |
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123 /* ... and read it from the registry */ |
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124 regresult = RegQueryValueExA(hKey, |
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125 REGSTR_VAL_JOYOEMNAME, 0, 0, |
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126 (LPBYTE) name, ®size); |
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127 } |
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128 } |
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129 RegCloseKey(hKey); |
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130 |
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131 return(name); |
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132 } |
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133 |
| 0 | 134 /* Function to scan the system for joysticks. |
| 135 * This function should set SDL_numjoysticks to the number of available | |
| 136 * joysticks. Joystick 0 should be the system default joystick. | |
| 137 * It should return 0, or -1 on an unrecoverable fatal error. | |
| 138 */ | |
| 139 int SDL_SYS_JoystickInit(void) | |
| 140 { | |
| 141 int i; | |
| 142 int maxdevs; | |
| 143 int numdevs; | |
| 144 JOYINFOEX joyinfo; | |
| 145 JOYCAPS joycaps; | |
| 146 MMRESULT result; | |
| 147 | |
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148 /* Reset the joystick ID & name mapping tables */ |
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149 for ( i = 0; i < MAX_JOYSTICKS; ++i ) { |
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150 SYS_JoystickID[i] = 0; |
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151 SYS_JoystickName[i] = NULL; |
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152 } |
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153 |
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154 /* Loop over all potential joystick devices */ |
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155 numdevs = 0; |
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156 maxdevs = joyGetNumDevs(); |
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157 for ( i = JOYSTICKID1; i < maxdevs && numdevs < MAX_JOYSTICKS; ++i ) { |
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158 |
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159 joyinfo.dwSize = sizeof(joyinfo); |
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160 joyinfo.dwFlags = JOY_RETURNALL; |
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161 result = joyGetPosEx(i, &joyinfo); |
| 0 | 162 if ( result == JOYERR_NOERROR ) { |
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163 result = joyGetDevCaps(i, &joycaps, sizeof(joycaps)); |
| 0 | 164 if ( result == JOYERR_NOERROR ) { |
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165 SYS_JoystickID[numdevs] = i; |
| 0 | 166 SYS_Joystick[numdevs] = joycaps; |
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167 SYS_JoystickName[numdevs] = GetJoystickName(i, joycaps.szRegKey); |
| 0 | 168 numdevs++; |
| 169 } | |
| 170 } | |
| 171 } | |
| 172 return(numdevs); | |
| 173 } | |
| 174 | |
| 175 /* Function to get the device-dependent name of a joystick */ | |
| 176 const char *SDL_SYS_JoystickName(int index) | |
| 177 { | |
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178 if ( SYS_JoystickName[index] != NULL ) { |
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179 return(SYS_JoystickName[index]); |
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180 } else { |
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181 return(SYS_Joystick[index].szPname); |
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182 } |
| 0 | 183 } |
| 184 | |
| 185 /* Function to open a joystick for use. | |
| 186 The joystick to open is specified by the index field of the joystick. | |
| 187 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 188 It returns 0, or -1 if there is an error. | |
| 189 */ | |
| 190 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 191 { | |
| 192 int index, i; | |
| 193 int caps_flags[MAX_AXES-2] = | |
| 194 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV }; | |
| 195 int axis_min[MAX_AXES], axis_max[MAX_AXES]; | |
| 196 | |
| 197 | |
| 198 /* shortcut */ | |
| 199 index = joystick->index; | |
| 200 axis_min[0] = SYS_Joystick[index].wXmin; | |
| 201 axis_max[0] = SYS_Joystick[index].wXmax; | |
| 202 axis_min[1] = SYS_Joystick[index].wYmin; | |
| 203 axis_max[1] = SYS_Joystick[index].wYmax; | |
| 204 axis_min[2] = SYS_Joystick[index].wZmin; | |
| 205 axis_max[2] = SYS_Joystick[index].wZmax; | |
| 206 axis_min[3] = SYS_Joystick[index].wRmin; | |
| 207 axis_max[3] = SYS_Joystick[index].wRmax; | |
| 208 axis_min[4] = SYS_Joystick[index].wUmin; | |
| 209 axis_max[4] = SYS_Joystick[index].wUmax; | |
| 210 axis_min[5] = SYS_Joystick[index].wVmin; | |
| 211 axis_max[5] = SYS_Joystick[index].wVmax; | |
| 212 | |
| 213 /* allocate memory for system specific hardware data */ | |
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214 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| 0 | 215 if (joystick->hwdata == NULL) |
| 216 { | |
| 217 SDL_OutOfMemory(); | |
| 218 return(-1); | |
| 219 } | |
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220 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| 0 | 221 |
| 222 /* set hardware data */ | |
| 223 joystick->hwdata->id = SYS_JoystickID[index]; | |
| 224 for ( i = 0; i < MAX_AXES; ++i ) { | |
| 225 if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) { | |
| 226 joystick->hwdata->transaxis[i].offset = | |
| 227 AXIS_MIN - axis_min[i]; | |
| 228 joystick->hwdata->transaxis[i].scale = | |
| 229 (float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]); | |
| 230 } else { | |
| 231 joystick->hwdata->transaxis[i].offset = 0; | |
| 232 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */ | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 /* fill nbuttons, naxes, and nhats fields */ | |
| 237 joystick->nbuttons = SYS_Joystick[index].wNumButtons; | |
| 238 joystick->naxes = SYS_Joystick[index].wNumAxes; | |
| 239 if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) { | |
| 240 joystick->nhats = 1; | |
| 241 } else { | |
| 242 joystick->nhats = 0; | |
| 243 } | |
| 244 return(0); | |
| 245 } | |
| 246 | |
| 247 static Uint8 TranslatePOV(DWORD value) | |
| 248 { | |
| 249 Uint8 pos; | |
| 250 | |
| 251 pos = SDL_HAT_CENTERED; | |
| 252 if ( value != JOY_POVCENTERED ) { | |
| 253 if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) { | |
| 254 pos |= SDL_HAT_UP; | |
| 255 } | |
| 256 if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) { | |
| 257 pos |= SDL_HAT_RIGHT; | |
| 258 } | |
| 259 if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) { | |
| 260 pos |= SDL_HAT_DOWN; | |
| 261 } | |
| 262 if ( value > JOY_POVBACKWARD ) { | |
| 263 pos |= SDL_HAT_LEFT; | |
| 264 } | |
| 265 } | |
| 266 return(pos); | |
| 267 } | |
| 268 | |
| 269 /* Function to update the state of a joystick - called as a device poll. | |
| 270 * This function shouldn't update the joystick structure directly, | |
| 271 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 272 * and update joystick device state. | |
| 273 */ | |
| 274 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 275 { | |
| 276 MMRESULT result; | |
| 277 int i; | |
| 278 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ, | |
| 279 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV }; | |
| 280 DWORD pos[MAX_AXES]; | |
| 281 struct _transaxis *transaxis; | |
| 282 int value, change; | |
| 283 JOYINFOEX joyinfo; | |
| 284 | |
| 285 joyinfo.dwSize = sizeof(joyinfo); | |
| 286 joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS; | |
| 287 if ( ! joystick->hats ) { | |
| 288 joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS); | |
| 289 } | |
| 290 result = joyGetPosEx(joystick->hwdata->id, &joyinfo); | |
| 291 if ( result != JOYERR_NOERROR ) { | |
| 292 SetMMerror("joyGetPosEx", result); | |
| 293 return; | |
| 294 } | |
| 295 | |
| 296 /* joystick motion events */ | |
| 297 pos[0] = joyinfo.dwXpos; | |
| 298 pos[1] = joyinfo.dwYpos; | |
| 299 pos[2] = joyinfo.dwZpos; | |
| 300 pos[3] = joyinfo.dwRpos; | |
| 301 pos[4] = joyinfo.dwUpos; | |
| 302 pos[5] = joyinfo.dwVpos; | |
| 303 | |
| 304 transaxis = joystick->hwdata->transaxis; | |
| 305 for (i = 0; i < joystick->naxes; i++) { | |
| 306 if (joyinfo.dwFlags & flags[i]) { | |
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307 value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale); |
| 0 | 308 change = (value - joystick->axes[i]); |
| 309 if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) { | |
| 310 SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value); | |
| 311 } | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 /* joystick button events */ | |
| 316 if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) { | |
| 317 for ( i = 0; i < joystick->nbuttons; ++i ) { | |
| 318 if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) { | |
| 319 if ( ! joystick->buttons[i] ) { | |
| 320 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED); | |
| 321 } | |
| 322 } else { | |
| 323 if ( joystick->buttons[i] ) { | |
| 324 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED); | |
| 325 } | |
| 326 } | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 /* joystick hat events */ | |
| 331 if ( joyinfo.dwFlags & JOY_RETURNPOV ) { | |
| 332 Uint8 pos; | |
| 333 | |
| 334 pos = TranslatePOV(joyinfo.dwPOV); | |
| 335 if ( pos != joystick->hats[0] ) { | |
| 336 SDL_PrivateJoystickHat(joystick, 0, pos); | |
| 337 } | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 /* Function to close a joystick after use */ | |
| 342 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 343 { | |
| 344 if (joystick->hwdata != NULL) { | |
| 345 /* free system specific hardware data */ | |
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346 SDL_free(joystick->hwdata); |
| 0 | 347 } |
| 348 } | |
| 349 | |
| 350 /* Function to perform any system-specific joystick related cleanup */ | |
| 351 void SDL_SYS_JoystickQuit(void) | |
| 352 { | |
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353 int i; |
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354 for (i = 0; i < MAX_JOYSTICKS; i++) { |
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355 if ( SYS_JoystickName[i] != NULL ) { |
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356 SDL_free(SYS_JoystickName[i]); |
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357 } |
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358 } |
| 0 | 359 } |
| 360 | |
| 361 | |
| 362 /* implementation functions */ | |
| 363 void SetMMerror(char *function, int code) | |
| 364 { | |
| 365 static char *error; | |
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366 static char errbuf[1024]; |
| 0 | 367 |
| 368 errbuf[0] = 0; | |
| 369 switch (code) | |
| 370 { | |
| 371 case MMSYSERR_NODRIVER: | |
| 372 error = "Joystick driver not present"; | |
| 373 break; | |
| 374 | |
| 375 case MMSYSERR_INVALPARAM: | |
| 376 case JOYERR_PARMS: | |
| 377 error = "Invalid parameter(s)"; | |
| 378 break; | |
| 379 | |
| 380 case MMSYSERR_BADDEVICEID: | |
| 381 error = "Bad device ID"; | |
| 382 break; | |
| 383 | |
| 384 case JOYERR_UNPLUGGED: | |
| 385 error = "Joystick not attached"; | |
| 386 break; | |
| 387 | |
| 388 case JOYERR_NOCANDO: | |
| 389 error = "Can't capture joystick input"; | |
| 390 break; | |
| 391 | |
| 392 default: | |
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393 SDL_snprintf(errbuf, SDL_arraysize(errbuf), |
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394 "%s: Unknown Multimedia system error: 0x%x", |
| 0 | 395 function, code); |
| 396 break; | |
| 397 } | |
| 398 | |
| 399 if ( ! errbuf[0] ) { | |
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400 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error); |
| 0 | 401 } |
| 402 SDL_SetError("%s", errbuf); | |
| 403 } | |
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404 |
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405 #endif /* SDL_JOYSTICK_WINMM */ |