annotate src/joystick/win32/SDL_mmjoystick.c @ 4050:ef815c44c662 SDL-1.2

Warn Visual C++ users if they have a stale configure generated SDL_config.h
author Sam Lantinga <slouken@libsdl.org>
date Thu, 12 Jul 2007 02:51:58 +0000
parents 36f155ec8133
children 209a3ef8a328
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef SDL_JOYSTICK_WINMM
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25
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26 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */
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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"
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34 #include "SDL_joystick.h"
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35 #include "../SDL_sysjoystick.h"
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36 #include "../SDL_joystick_c.h"
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37
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38 #define MAX_JOYSTICKS 16
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39 #define MAX_AXES 6 /* each joystick can have up to 6 axes */
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40 #define MAX_BUTTONS 32 /* and 32 buttons */
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41 #define AXIS_MIN -32768 /* minimum value for axis coordinate */
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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)
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45 #define JOY_BUTTON_FLAG(n) (1<<n)
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46
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47
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48 /* array to hold joystick ID values */
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49 static UINT SYS_JoystickID[MAX_JOYSTICKS];
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50 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS];
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51 static char *SYS_JoystickName[MAX_JOYSTICKS];
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52
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53 /* The private structure used to keep track of a joystick */
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54 struct joystick_hwdata
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55 {
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56 /* joystick ID */
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57 UINT id;
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58
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59 /* values used to translate device-specific coordinates into
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60 SDL-standard ranges */
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61 struct _transaxis {
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62 int offset;
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63 float scale;
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64 } transaxis[6];
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65 };
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66
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67 /* Convert a win32 Multimedia API return code to a text message */
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68 static void SetMMerror(char *function, int code);
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69
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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 hKey;
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80 DWORD regsize;
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81 LONG regresult;
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82 unsigned char regkey[256];
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83 unsigned char regvalue[256];
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84 unsigned char regname[256];
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85
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86 SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s\\%s",
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87 REGSTR_PATH_JOYCONFIG,
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88 szRegKey,
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89 REGSTR_KEY_JOYCURR);
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90 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE,
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91 (LPTSTR) &regkey, 0, KEY_READ, &hKey);
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92 if (regresult == ERROR_SUCCESS)
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93 {
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94 /*
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95 find the registry key name for the
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96 joystick's properties
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97 */
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98 regsize = sizeof(regname);
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99 SDL_snprintf((char *) regvalue, SDL_arraysize(regvalue),
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100 "Joystick%d%s", index+1,
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101 REGSTR_VAL_JOYOEMNAME);
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102 regresult = RegQueryValueExA(hKey,
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103 (char *) regvalue, 0, 0, (LPBYTE) &regname,
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104 (LPDWORD) &regsize);
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105 RegCloseKey(hKey);
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106 if (regresult == ERROR_SUCCESS)
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107 {
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108 /* open that registry key */
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109 SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s",
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110 REGSTR_PATH_JOYOEM, regname);
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111 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE,
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112 (char *) regkey, 0, KEY_READ, &hKey);
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113 if (regresult == ERROR_SUCCESS)
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114 {
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115 /* find the size for the OEM name text */
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116 regsize = sizeof(regvalue);
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117 regresult =
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118 RegQueryValueExA(hKey,
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119 REGSTR_VAL_JOYOEMNAME,
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120 0, 0, NULL,
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121 (LPDWORD) &regsize);
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122 if (regresult == ERROR_SUCCESS)
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123 {
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124 /*
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125 allocate enough memory
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126 for the OEM name text ...
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127 */
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128 name = (char *) SDL_malloc(regsize);
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129 /* ... and read it from the registry */
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130 regresult =
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131 RegQueryValueExA(hKey,
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132 REGSTR_VAL_JOYOEMNAME, 0, 0,
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133 (LPBYTE) name,
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134 (LPDWORD) &regsize);
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135 RegCloseKey(hKey);
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136 }
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137 }
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138 }
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139 }
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140 return(name);
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141 }
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142
0
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143 /* Function to scan the system for joysticks.
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144 * This function should set SDL_numjoysticks to the number of available
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145 * joysticks. Joystick 0 should be the system default joystick.
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146 * It should return 0, or -1 on an unrecoverable fatal error.
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147 */
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148 int SDL_SYS_JoystickInit(void)
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149 {
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150 int i;
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151 int maxdevs;
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152 int numdevs;
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153 JOYINFOEX joyinfo;
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154 JOYCAPS joycaps;
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155 MMRESULT result;
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156
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157 /* Reset the joystick ID & name mapping tables */
5e86e34453d4 ------- Comment #1 From Max Horn 2006-04-17 03:08 [reply] -------
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158 for ( i = 0; i < MAX_JOYSTICKS; ++i ) {
5e86e34453d4 ------- Comment #1 From Max Horn 2006-04-17 03:08 [reply] -------
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159 SYS_JoystickID[i] = 0;
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160 SYS_JoystickName[i] = NULL;
531
8450e66651ea Fixed joystick detection problem on Windows XP (thanks Maciej!)
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161 }
8450e66651ea Fixed joystick detection problem on Windows XP (thanks Maciej!)
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162
1748
5e86e34453d4 ------- Comment #1 From Max Horn 2006-04-17 03:08 [reply] -------
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163 /* Loop over all potential joystick devices */
5e86e34453d4 ------- Comment #1 From Max Horn 2006-04-17 03:08 [reply] -------
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164 numdevs = 0;
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165 maxdevs = joyGetNumDevs();
5e86e34453d4 ------- Comment #1 From Max Horn 2006-04-17 03:08 [reply] -------
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166 for ( i = JOYSTICKID1; i < maxdevs && numdevs < MAX_JOYSTICKS; ++i ) {
165
6a4e09bbbbc0 Joystick initialization fix submitted by Vitaliy Mikitchenko
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167
6a4e09bbbbc0 Joystick initialization fix submitted by Vitaliy Mikitchenko
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168 joyinfo.dwSize = sizeof(joyinfo);
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169 joyinfo.dwFlags = JOY_RETURNALL;
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36f155ec8133 joyGetPosEx() was using the wrong variable for specifying a device; this is
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170 result = joyGetPosEx(i, &joyinfo);
0
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171 if ( result == JOYERR_NOERROR ) {
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172 result = joyGetDevCaps(i, &joycaps, sizeof(joycaps));
0
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173 if ( result == JOYERR_NOERROR ) {
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174 SYS_JoystickID[numdevs] = i;
0
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175 SYS_Joystick[numdevs] = joycaps;
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176 SYS_JoystickName[numdevs] = GetJoystickName(i, joycaps.szRegKey);
0
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177 numdevs++;
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178 }
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179 }
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180 }
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181 return(numdevs);
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182 }
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183
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184 /* Function to get the device-dependent name of a joystick */
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185 const char *SDL_SYS_JoystickName(int index)
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186 {
938
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187 if ( SYS_JoystickName[index] != NULL ) {
fa2ce068b0b6 Hmm, this should work a little better. :)
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188 return(SYS_JoystickName[index]);
937
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189 } else {
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190 return(SYS_Joystick[index].szPname);
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191 }
0
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192 }
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193
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194 /* Function to open a joystick for use.
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195 The joystick to open is specified by the index field of the joystick.
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196 This should fill the nbuttons and naxes fields of the joystick structure.
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197 It returns 0, or -1 if there is an error.
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198 */
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199 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
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200 {
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201 int index, i;
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202 int caps_flags[MAX_AXES-2] =
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203 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV };
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204 int axis_min[MAX_AXES], axis_max[MAX_AXES];
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205
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206
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207 /* shortcut */
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208 index = joystick->index;
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209 axis_min[0] = SYS_Joystick[index].wXmin;
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210 axis_max[0] = SYS_Joystick[index].wXmax;
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211 axis_min[1] = SYS_Joystick[index].wYmin;
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212 axis_max[1] = SYS_Joystick[index].wYmax;
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213 axis_min[2] = SYS_Joystick[index].wZmin;
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214 axis_max[2] = SYS_Joystick[index].wZmax;
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215 axis_min[3] = SYS_Joystick[index].wRmin;
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216 axis_max[3] = SYS_Joystick[index].wRmax;
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217 axis_min[4] = SYS_Joystick[index].wUmin;
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218 axis_max[4] = SYS_Joystick[index].wUmax;
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219 axis_min[5] = SYS_Joystick[index].wVmin;
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220 axis_max[5] = SYS_Joystick[index].wVmax;
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221
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222 /* allocate memory for system specific hardware data */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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diff changeset
223 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata));
0
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224 if (joystick->hwdata == NULL)
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225 {
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226 SDL_OutOfMemory();
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227 return(-1);
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228 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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diff changeset
229 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
0
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230
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231 /* set hardware data */
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232 joystick->hwdata->id = SYS_JoystickID[index];
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233 for ( i = 0; i < MAX_AXES; ++i ) {
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234 if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) {
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235 joystick->hwdata->transaxis[i].offset =
74212992fb08 Initial revision
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diff changeset
236 AXIS_MIN - axis_min[i];
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diff changeset
237 joystick->hwdata->transaxis[i].scale =
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diff changeset
238 (float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]);
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239 } else {
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240 joystick->hwdata->transaxis[i].offset = 0;
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diff changeset
241 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */
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242 }
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243 }
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parents:
diff changeset
244
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245 /* fill nbuttons, naxes, and nhats fields */
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246 joystick->nbuttons = SYS_Joystick[index].wNumButtons;
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diff changeset
247 joystick->naxes = SYS_Joystick[index].wNumAxes;
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diff changeset
248 if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) {
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249 joystick->nhats = 1;
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diff changeset
250 } else {
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diff changeset
251 joystick->nhats = 0;
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diff changeset
252 }
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diff changeset
253 return(0);
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diff changeset
254 }
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255
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diff changeset
256 static Uint8 TranslatePOV(DWORD value)
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diff changeset
257 {
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diff changeset
258 Uint8 pos;
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diff changeset
259
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diff changeset
260 pos = SDL_HAT_CENTERED;
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diff changeset
261 if ( value != JOY_POVCENTERED ) {
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diff changeset
262 if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) {
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diff changeset
263 pos |= SDL_HAT_UP;
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diff changeset
264 }
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265 if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) {
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diff changeset
266 pos |= SDL_HAT_RIGHT;
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diff changeset
267 }
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diff changeset
268 if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) {
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diff changeset
269 pos |= SDL_HAT_DOWN;
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parents:
diff changeset
270 }
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diff changeset
271 if ( value > JOY_POVBACKWARD ) {
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diff changeset
272 pos |= SDL_HAT_LEFT;
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parents:
diff changeset
273 }
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parents:
diff changeset
274 }
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parents:
diff changeset
275 return(pos);
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parents:
diff changeset
276 }
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diff changeset
277
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diff changeset
278 /* Function to update the state of a joystick - called as a device poll.
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parents:
diff changeset
279 * This function shouldn't update the joystick structure directly,
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280 * but instead should call SDL_PrivateJoystick*() to deliver events
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diff changeset
281 * and update joystick device state.
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diff changeset
282 */
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diff changeset
283 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
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diff changeset
284 {
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diff changeset
285 MMRESULT result;
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diff changeset
286 int i;
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287 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ,
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diff changeset
288 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV };
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diff changeset
289 DWORD pos[MAX_AXES];
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parents:
diff changeset
290 struct _transaxis *transaxis;
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parents:
diff changeset
291 int value, change;
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parents:
diff changeset
292 JOYINFOEX joyinfo;
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diff changeset
293
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diff changeset
294 joyinfo.dwSize = sizeof(joyinfo);
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diff changeset
295 joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS;
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296 if ( ! joystick->hats ) {
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297 joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS);
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298 }
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299 result = joyGetPosEx(joystick->hwdata->id, &joyinfo);
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300 if ( result != JOYERR_NOERROR ) {
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301 SetMMerror("joyGetPosEx", result);
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302 return;
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303 }
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304
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305 /* joystick motion events */
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306 pos[0] = joyinfo.dwXpos;
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307 pos[1] = joyinfo.dwYpos;
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308 pos[2] = joyinfo.dwZpos;
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309 pos[3] = joyinfo.dwRpos;
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310 pos[4] = joyinfo.dwUpos;
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311 pos[5] = joyinfo.dwVpos;
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312
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313 transaxis = joystick->hwdata->transaxis;
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314 for (i = 0; i < joystick->naxes; i++) {
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315 if (joyinfo.dwFlags & flags[i]) {
49
6f3c474f9abd Fixed bug in joystick motion, thanks to Alexandre Duret-Lutz
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parents: 0
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316 value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale);
0
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317 change = (value - joystick->axes[i]);
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318 if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) {
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319 SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value);
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320 }
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321 }
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322 }
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323
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324 /* joystick button events */
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325 if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) {
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326 for ( i = 0; i < joystick->nbuttons; ++i ) {
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327 if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) {
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328 if ( ! joystick->buttons[i] ) {
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329 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED);
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330 }
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331 } else {
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332 if ( joystick->buttons[i] ) {
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333 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED);
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334 }
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335 }
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336 }
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337 }
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338
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339 /* joystick hat events */
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340 if ( joyinfo.dwFlags & JOY_RETURNPOV ) {
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341 Uint8 pos;
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342
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343 pos = TranslatePOV(joyinfo.dwPOV);
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344 if ( pos != joystick->hats[0] ) {
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345 SDL_PrivateJoystickHat(joystick, 0, pos);
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346 }
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347 }
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diff changeset
348 }
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diff changeset
349
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diff changeset
350 /* Function to close a joystick after use */
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diff changeset
351 void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
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diff changeset
352 {
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353 if (joystick->hwdata != NULL) {
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diff changeset
354 /* free system specific hardware data */
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3692456e7b0f Use SDL_ prefixed versions of C library functions.
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diff changeset
355 SDL_free(joystick->hwdata);
0
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356 }
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diff changeset
357 }
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diff changeset
358
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diff changeset
359 /* Function to perform any system-specific joystick related cleanup */
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diff changeset
360 void SDL_SYS_JoystickQuit(void)
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diff changeset
361 {
937
1e6366bde299 Date: Tue, 27 Jul 2004 17:14:00 +0200
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parents: 834
diff changeset
362 int i;
1e6366bde299 Date: Tue, 27 Jul 2004 17:14:00 +0200
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diff changeset
363 for (i = 0; i < MAX_JOYSTICKS; i++) {
938
fa2ce068b0b6 Hmm, this should work a little better. :)
Sam Lantinga <slouken@libsdl.org>
parents: 937
diff changeset
364 if ( SYS_JoystickName[i] != NULL ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1330
diff changeset
365 SDL_free(SYS_JoystickName[i]);
937
1e6366bde299 Date: Tue, 27 Jul 2004 17:14:00 +0200
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parents: 834
diff changeset
366 }
1e6366bde299 Date: Tue, 27 Jul 2004 17:14:00 +0200
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diff changeset
367 }
0
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parents:
diff changeset
368 }
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parents:
diff changeset
369
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parents:
diff changeset
370
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parents:
diff changeset
371 /* implementation functions */
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parents:
diff changeset
372 void SetMMerror(char *function, int code)
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parents:
diff changeset
373 {
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diff changeset
374 static char *error;
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
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parents: 1312
diff changeset
375 static char errbuf[1024];
0
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parents:
diff changeset
376
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parents:
diff changeset
377 errbuf[0] = 0;
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parents:
diff changeset
378 switch (code)
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parents:
diff changeset
379 {
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parents:
diff changeset
380 case MMSYSERR_NODRIVER:
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parents:
diff changeset
381 error = "Joystick driver not present";
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parents:
diff changeset
382 break;
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parents:
diff changeset
383
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parents:
diff changeset
384 case MMSYSERR_INVALPARAM:
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parents:
diff changeset
385 case JOYERR_PARMS:
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parents:
diff changeset
386 error = "Invalid parameter(s)";
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parents:
diff changeset
387 break;
74212992fb08 Initial revision
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parents:
diff changeset
388
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parents:
diff changeset
389 case MMSYSERR_BADDEVICEID:
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parents:
diff changeset
390 error = "Bad device ID";
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parents:
diff changeset
391 break;
74212992fb08 Initial revision
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parents:
diff changeset
392
74212992fb08 Initial revision
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parents:
diff changeset
393 case JOYERR_UNPLUGGED:
74212992fb08 Initial revision
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parents:
diff changeset
394 error = "Joystick not attached";
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parents:
diff changeset
395 break;
74212992fb08 Initial revision
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parents:
diff changeset
396
74212992fb08 Initial revision
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parents:
diff changeset
397 case JOYERR_NOCANDO:
74212992fb08 Initial revision
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parents:
diff changeset
398 error = "Can't capture joystick input";
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 default:
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
402 SDL_snprintf(errbuf, SDL_arraysize(errbuf),
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
403 "%s: Unknown Multimedia system error: 0x%x",
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 function, code);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 if ( ! errbuf[0] ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
409 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 SDL_SetError("%s", errbuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 }
1635
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
413
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
414 #endif /* SDL_JOYSTICK_WINMM */