Mercurial > sdl-ios-xcode
annotate src/joystick/win32/SDL_mmjoystick.c @ 1554:0ca607a5d173
Fixed bug #84
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 19 Mar 2006 12:04:40 +0000 |
| parents | bb6839704ed6 |
| 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 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */ | |
| 25 | |
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26 #define WIN32_LEAN_AND_MEAN |
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27 #include <windows.h> |
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More header massaging... works great on Windows. ;-)
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28 #include <mmsystem.h> |
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More header massaging... works great on Windows. ;-)
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29 #include <regstr.h> |
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30 |
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31 #include "SDL_events.h" |
| 0 | 32 #include "SDL_joystick.h" |
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33 #include "../SDL_sysjoystick.h" |
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34 #include "../SDL_joystick_c.h" |
| 0 | 35 |
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36 #define MAX_JOYSTICKS 16 |
| 0 | 37 #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
| 38 #define MAX_BUTTONS 32 /* and 32 buttons */ | |
| 39 #define AXIS_MIN -32768 /* minimum value for axis coordinate */ | |
| 40 #define AXIS_MAX 32767 /* maximum value for axis coordinate */ | |
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*** empty log message ***
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41 /* limit axis to 256 possible positions to filter out noise */ |
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42 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) |
| 0 | 43 #define JOY_BUTTON_FLAG(n) (1<<n) |
| 44 | |
| 45 | |
| 46 /* array to hold joystick ID values */ | |
| 47 static UINT SYS_JoystickID[MAX_JOYSTICKS]; | |
| 48 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS]; | |
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49 static char *SYS_JoystickName[MAX_JOYSTICKS]; |
| 0 | 50 |
| 51 /* The private structure used to keep track of a joystick */ | |
| 52 struct joystick_hwdata | |
| 53 { | |
| 54 /* joystick ID */ | |
| 55 UINT id; | |
| 56 | |
| 57 /* values used to translate device-specific coordinates into | |
| 58 SDL-standard ranges */ | |
| 59 struct _transaxis { | |
| 60 int offset; | |
| 61 float scale; | |
| 62 } transaxis[6]; | |
| 63 }; | |
| 64 | |
| 65 /* Convert a win32 Multimedia API return code to a text message */ | |
| 66 static void SetMMerror(char *function, int code); | |
| 67 | |
| 68 | |
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69 static char *GetJoystickName(int index, const char *szRegKey) |
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70 { |
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71 /* added 7/24/2004 by Eckhard Stolberg */ |
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72 /* |
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73 see if there is a joystick for the current |
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74 index (1-16) listed in the registry |
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75 */ |
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76 char *name = NULL; |
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77 HKEY hKey; |
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78 DWORD regsize; |
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79 LONG regresult; |
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80 unsigned char regkey[256]; |
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81 unsigned char regvalue[256]; |
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82 unsigned char regname[256]; |
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83 |
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84 SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s\\%s", |
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85 REGSTR_PATH_JOYCONFIG, |
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86 szRegKey, |
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87 REGSTR_KEY_JOYCURR); |
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88 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE, |
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89 (LPTSTR) ®key, 0, KEY_READ, &hKey); |
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90 if (regresult == ERROR_SUCCESS) |
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91 { |
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92 /* |
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93 find the registry key name for the |
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94 joystick's properties |
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95 */ |
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96 regsize = sizeof(regname); |
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97 SDL_snprintf((char *) regvalue, SDL_arraysize(regvalue), |
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98 "Joystick%d%s", index+1, |
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99 REGSTR_VAL_JOYOEMNAME); |
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100 regresult = RegQueryValueExA(hKey, |
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101 (char *) regvalue, 0, 0, (LPBYTE) ®name, |
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102 (LPDWORD) ®size); |
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103 RegCloseKey(hKey); |
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104 if (regresult == ERROR_SUCCESS) |
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105 { |
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106 /* open that registry key */ |
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107 SDL_snprintf((char *) regkey, SDL_arraysize(regkey), "%s\\%s", |
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108 REGSTR_PATH_JOYOEM, regname); |
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109 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE, |
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110 (char *) regkey, 0, KEY_READ, &hKey); |
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111 if (regresult == ERROR_SUCCESS) |
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112 { |
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113 /* find the size for the OEM name text */ |
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114 regsize = sizeof(regvalue); |
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115 regresult = |
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116 RegQueryValueExA(hKey, |
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117 REGSTR_VAL_JOYOEMNAME, |
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118 0, 0, NULL, |
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119 (LPDWORD) ®size); |
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120 if (regresult == ERROR_SUCCESS) |
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121 { |
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122 /* |
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123 allocate enough memory |
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124 for the OEM name text ... |
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125 */ |
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126 name = (char *) SDL_malloc(regsize); |
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127 /* ... and read it from the registry */ |
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128 regresult = |
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129 RegQueryValueExA(hKey, |
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130 REGSTR_VAL_JOYOEMNAME, 0, 0, |
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131 (LPBYTE) name, |
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132 (LPDWORD) ®size); |
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133 RegCloseKey(hKey); |
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134 } |
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135 } |
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136 } |
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137 } |
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138 return(name); |
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139 } |
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140 |
| 0 | 141 /* Function to scan the system for joysticks. |
| 142 * This function should set SDL_numjoysticks to the number of available | |
| 143 * joysticks. Joystick 0 should be the system default joystick. | |
| 144 * It should return 0, or -1 on an unrecoverable fatal error. | |
| 145 */ | |
| 146 int SDL_SYS_JoystickInit(void) | |
| 147 { | |
| 148 int i; | |
| 149 int maxdevs; | |
| 150 int numdevs; | |
| 151 JOYINFOEX joyinfo; | |
| 152 JOYCAPS joycaps; | |
| 153 MMRESULT result; | |
| 154 | |
| 155 numdevs = 0; | |
| 156 maxdevs = joyGetNumDevs(); | |
|
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157 |
| 0 | 158 if ( maxdevs > MAX_JOYSTICKS ) { |
| 159 maxdevs = MAX_JOYSTICKS; | |
| 160 } | |
| 161 | |
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162 |
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163 for ( i = 0; i < MAX_JOYSTICKS; i++ ) { |
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164 SYS_JoystickID[i] = JOYSTICKID1 + i; |
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165 SYS_JoystickName[i] = NULL; |
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166 } |
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167 |
| 0 | 168 |
| 169 for ( i = 0; (i < maxdevs); ++i ) { | |
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170 |
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171 /* added 8/31/2001 By Vitaliy Mikitchenko */ |
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172 joyinfo.dwSize = sizeof(joyinfo); |
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173 joyinfo.dwFlags = JOY_RETURNALL; |
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174 /* end addition */ |
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175 |
| 0 | 176 result = joyGetPosEx(SYS_JoystickID[i], &joyinfo); |
| 177 if ( result == JOYERR_NOERROR ) { | |
| 178 result = joyGetDevCaps(SYS_JoystickID[i], &joycaps, sizeof(joycaps)); | |
| 179 if ( result == JOYERR_NOERROR ) { | |
| 180 SYS_JoystickID[numdevs] = SYS_JoystickID[i]; | |
| 181 SYS_Joystick[numdevs] = joycaps; | |
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182 SYS_JoystickName[numdevs] = GetJoystickName(numdevs, joycaps.szRegKey); |
| 0 | 183 numdevs++; |
| 184 } | |
| 185 } | |
| 186 } | |
| 187 return(numdevs); | |
| 188 } | |
| 189 | |
| 190 /* Function to get the device-dependent name of a joystick */ | |
| 191 const char *SDL_SYS_JoystickName(int index) | |
| 192 { | |
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193 if ( SYS_JoystickName[index] != NULL ) { |
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194 return(SYS_JoystickName[index]); |
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195 } else { |
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196 return(SYS_Joystick[index].szPname); |
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197 } |
| 0 | 198 } |
| 199 | |
| 200 /* Function to open a joystick for use. | |
| 201 The joystick to open is specified by the index field of the joystick. | |
| 202 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 203 It returns 0, or -1 if there is an error. | |
| 204 */ | |
| 205 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 206 { | |
| 207 int index, i; | |
| 208 int caps_flags[MAX_AXES-2] = | |
| 209 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV }; | |
| 210 int axis_min[MAX_AXES], axis_max[MAX_AXES]; | |
| 211 | |
| 212 | |
| 213 /* shortcut */ | |
| 214 index = joystick->index; | |
| 215 axis_min[0] = SYS_Joystick[index].wXmin; | |
| 216 axis_max[0] = SYS_Joystick[index].wXmax; | |
| 217 axis_min[1] = SYS_Joystick[index].wYmin; | |
| 218 axis_max[1] = SYS_Joystick[index].wYmax; | |
| 219 axis_min[2] = SYS_Joystick[index].wZmin; | |
| 220 axis_max[2] = SYS_Joystick[index].wZmax; | |
| 221 axis_min[3] = SYS_Joystick[index].wRmin; | |
| 222 axis_max[3] = SYS_Joystick[index].wRmax; | |
| 223 axis_min[4] = SYS_Joystick[index].wUmin; | |
| 224 axis_max[4] = SYS_Joystick[index].wUmax; | |
| 225 axis_min[5] = SYS_Joystick[index].wVmin; | |
| 226 axis_max[5] = SYS_Joystick[index].wVmax; | |
| 227 | |
| 228 /* allocate memory for system specific hardware data */ | |
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229 joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); |
| 0 | 230 if (joystick->hwdata == NULL) |
| 231 { | |
| 232 SDL_OutOfMemory(); | |
| 233 return(-1); | |
| 234 } | |
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235 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| 0 | 236 |
| 237 /* set hardware data */ | |
| 238 joystick->hwdata->id = SYS_JoystickID[index]; | |
| 239 for ( i = 0; i < MAX_AXES; ++i ) { | |
| 240 if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) { | |
| 241 joystick->hwdata->transaxis[i].offset = | |
| 242 AXIS_MIN - axis_min[i]; | |
| 243 joystick->hwdata->transaxis[i].scale = | |
| 244 (float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]); | |
| 245 } else { | |
| 246 joystick->hwdata->transaxis[i].offset = 0; | |
| 247 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */ | |
| 248 } | |
| 249 } | |
| 250 | |
| 251 /* fill nbuttons, naxes, and nhats fields */ | |
| 252 joystick->nbuttons = SYS_Joystick[index].wNumButtons; | |
| 253 joystick->naxes = SYS_Joystick[index].wNumAxes; | |
| 254 if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) { | |
| 255 joystick->nhats = 1; | |
| 256 } else { | |
| 257 joystick->nhats = 0; | |
| 258 } | |
| 259 return(0); | |
| 260 } | |
| 261 | |
| 262 static Uint8 TranslatePOV(DWORD value) | |
| 263 { | |
| 264 Uint8 pos; | |
| 265 | |
| 266 pos = SDL_HAT_CENTERED; | |
| 267 if ( value != JOY_POVCENTERED ) { | |
| 268 if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) { | |
| 269 pos |= SDL_HAT_UP; | |
| 270 } | |
| 271 if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) { | |
| 272 pos |= SDL_HAT_RIGHT; | |
| 273 } | |
| 274 if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) { | |
| 275 pos |= SDL_HAT_DOWN; | |
| 276 } | |
| 277 if ( value > JOY_POVBACKWARD ) { | |
| 278 pos |= SDL_HAT_LEFT; | |
| 279 } | |
| 280 } | |
| 281 return(pos); | |
| 282 } | |
| 283 | |
| 284 /* Function to update the state of a joystick - called as a device poll. | |
| 285 * This function shouldn't update the joystick structure directly, | |
| 286 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 287 * and update joystick device state. | |
| 288 */ | |
| 289 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 290 { | |
| 291 MMRESULT result; | |
| 292 int i; | |
| 293 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ, | |
| 294 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV }; | |
| 295 DWORD pos[MAX_AXES]; | |
| 296 struct _transaxis *transaxis; | |
| 297 int value, change; | |
| 298 JOYINFOEX joyinfo; | |
| 299 | |
| 300 joyinfo.dwSize = sizeof(joyinfo); | |
| 301 joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS; | |
| 302 if ( ! joystick->hats ) { | |
| 303 joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS); | |
| 304 } | |
| 305 result = joyGetPosEx(joystick->hwdata->id, &joyinfo); | |
| 306 if ( result != JOYERR_NOERROR ) { | |
| 307 SetMMerror("joyGetPosEx", result); | |
| 308 return; | |
| 309 } | |
| 310 | |
| 311 /* joystick motion events */ | |
| 312 pos[0] = joyinfo.dwXpos; | |
| 313 pos[1] = joyinfo.dwYpos; | |
| 314 pos[2] = joyinfo.dwZpos; | |
| 315 pos[3] = joyinfo.dwRpos; | |
| 316 pos[4] = joyinfo.dwUpos; | |
| 317 pos[5] = joyinfo.dwVpos; | |
| 318 | |
| 319 transaxis = joystick->hwdata->transaxis; | |
| 320 for (i = 0; i < joystick->naxes; i++) { | |
| 321 if (joyinfo.dwFlags & flags[i]) { | |
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322 value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale); |
| 0 | 323 change = (value - joystick->axes[i]); |
| 324 if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) { | |
| 325 SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value); | |
| 326 } | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 /* joystick button events */ | |
| 331 if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) { | |
| 332 for ( i = 0; i < joystick->nbuttons; ++i ) { | |
| 333 if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) { | |
| 334 if ( ! joystick->buttons[i] ) { | |
| 335 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED); | |
| 336 } | |
| 337 } else { | |
| 338 if ( joystick->buttons[i] ) { | |
| 339 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED); | |
| 340 } | |
| 341 } | |
| 342 } | |
| 343 } | |
| 344 | |
| 345 /* joystick hat events */ | |
| 346 if ( joyinfo.dwFlags & JOY_RETURNPOV ) { | |
| 347 Uint8 pos; | |
| 348 | |
| 349 pos = TranslatePOV(joyinfo.dwPOV); | |
| 350 if ( pos != joystick->hats[0] ) { | |
| 351 SDL_PrivateJoystickHat(joystick, 0, pos); | |
| 352 } | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 /* Function to close a joystick after use */ | |
| 357 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 358 { | |
| 359 if (joystick->hwdata != NULL) { | |
| 360 /* free system specific hardware data */ | |
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361 SDL_free(joystick->hwdata); |
| 0 | 362 } |
| 363 } | |
| 364 | |
| 365 /* Function to perform any system-specific joystick related cleanup */ | |
| 366 void SDL_SYS_JoystickQuit(void) | |
| 367 { | |
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368 int i; |
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369 for (i = 0; i < MAX_JOYSTICKS; i++) { |
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370 if ( SYS_JoystickName[i] != NULL ) { |
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371 SDL_free(SYS_JoystickName[i]); |
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372 } |
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373 } |
| 0 | 374 } |
| 375 | |
| 376 | |
| 377 /* implementation functions */ | |
| 378 void SetMMerror(char *function, int code) | |
| 379 { | |
| 380 static char *error; | |
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381 static char errbuf[1024]; |
| 0 | 382 |
| 383 errbuf[0] = 0; | |
| 384 switch (code) | |
| 385 { | |
| 386 case MMSYSERR_NODRIVER: | |
| 387 error = "Joystick driver not present"; | |
| 388 break; | |
| 389 | |
| 390 case MMSYSERR_INVALPARAM: | |
| 391 case JOYERR_PARMS: | |
| 392 error = "Invalid parameter(s)"; | |
| 393 break; | |
| 394 | |
| 395 case MMSYSERR_BADDEVICEID: | |
| 396 error = "Bad device ID"; | |
| 397 break; | |
| 398 | |
| 399 case JOYERR_UNPLUGGED: | |
| 400 error = "Joystick not attached"; | |
| 401 break; | |
| 402 | |
| 403 case JOYERR_NOCANDO: | |
| 404 error = "Can't capture joystick input"; | |
| 405 break; | |
| 406 | |
| 407 default: | |
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408 SDL_snprintf(errbuf, SDL_arraysize(errbuf), |
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409 "%s: Unknown Multimedia system error: 0x%x", |
| 0 | 410 function, code); |
| 411 break; | |
| 412 } | |
| 413 | |
| 414 if ( ! errbuf[0] ) { | |
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415 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error); |
| 0 | 416 } |
| 417 SDL_SetError("%s", errbuf); | |
| 418 } |