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Diffstat (limited to 'distrib/sdl-1.2.15/src/joystick/win32/SDL_mmjoystick.c')
| -rw-r--r-- | distrib/sdl-1.2.15/src/joystick/win32/SDL_mmjoystick.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/joystick/win32/SDL_mmjoystick.c b/distrib/sdl-1.2.15/src/joystick/win32/SDL_mmjoystick.c new file mode 100644 index 0000000..8c53f9e --- /dev/null +++ b/distrib/sdl-1.2.15/src/joystick/win32/SDL_mmjoystick.c @@ -0,0 +1,407 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +#ifdef SDL_JOYSTICK_WINMM + +/* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */ + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> +#include <mmsystem.h> +#include <regstr.h> + +#include "SDL_events.h" +#include "SDL_joystick.h" +#include "../SDL_sysjoystick.h" +#include "../SDL_joystick_c.h" + +#define MAX_JOYSTICKS 16 +#define MAX_AXES 6 /* each joystick can have up to 6 axes */ +#define MAX_BUTTONS 32 /* and 32 buttons */ +#define AXIS_MIN -32768 /* minimum value for axis coordinate */ +#define AXIS_MAX 32767 /* maximum value for axis coordinate */ +/* limit axis to 256 possible positions to filter out noise */ +#define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) +#define JOY_BUTTON_FLAG(n) (1<<n) + + +/* array to hold joystick ID values */ +static UINT SYS_JoystickID[MAX_JOYSTICKS]; +static JOYCAPS SYS_Joystick[MAX_JOYSTICKS]; +static char *SYS_JoystickName[MAX_JOYSTICKS]; + +/* The private structure used to keep track of a joystick */ +struct joystick_hwdata +{ + /* joystick ID */ + UINT id; + + /* values used to translate device-specific coordinates into + SDL-standard ranges */ + struct _transaxis { + int offset; + float scale; + } transaxis[6]; +}; + +/* Convert a win32 Multimedia API return code to a text message */ +static void SetMMerror(char *function, int code); + + +static char *GetJoystickName(int index, const char *szRegKey) +{ + /* added 7/24/2004 by Eckhard Stolberg */ + /* + see if there is a joystick for the current + index (1-16) listed in the registry + */ + char *name = NULL; + HKEY hTopKey; + HKEY hKey; + DWORD regsize; + LONG regresult; + char regkey[256]; + char regvalue[256]; + char regname[256]; + + SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s\\%s", + REGSTR_PATH_JOYCONFIG, szRegKey, REGSTR_KEY_JOYCURR); + hTopKey = HKEY_LOCAL_MACHINE; + regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); + if (regresult != ERROR_SUCCESS) { + hTopKey = HKEY_CURRENT_USER; + regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); + } + if (regresult != ERROR_SUCCESS) { + return NULL; + } + + /* find the registry key name for the joystick's properties */ + regsize = sizeof(regname); + SDL_snprintf(regvalue, SDL_arraysize(regvalue), "Joystick%d%s", index+1, REGSTR_VAL_JOYOEMNAME); + regresult = RegQueryValueExA(hKey, regvalue, 0, 0, (LPBYTE)regname, ®size); + RegCloseKey(hKey); + + if (regresult != ERROR_SUCCESS) { + return NULL; + } + + /* open that registry key */ + SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s", REGSTR_PATH_JOYOEM, regname); + regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey); + if (regresult != ERROR_SUCCESS) { + return NULL; + } + + /* find the size for the OEM name text */ + regsize = sizeof(regvalue); + regresult = RegQueryValueExA(hKey, REGSTR_VAL_JOYOEMNAME, 0, 0, NULL, ®size); + if (regresult == ERROR_SUCCESS) { + /* allocate enough memory for the OEM name text ... */ + name = (char *) SDL_malloc(regsize); + if ( name ) { + /* ... and read it from the registry */ + regresult = RegQueryValueExA(hKey, + REGSTR_VAL_JOYOEMNAME, 0, 0, + (LPBYTE) name, ®size); + } + } + RegCloseKey(hKey); + + return(name); +} + +/* Function to scan the system for joysticks. + * This function should set SDL_numjoysticks to the number of available + * joysticks. Joystick 0 should be the system default joystick. + * It should return 0, or -1 on an unrecoverable fatal error. + */ +int SDL_SYS_JoystickInit(void) +{ + int i; + int maxdevs; + int numdevs; + JOYINFOEX joyinfo; + JOYCAPS joycaps; + MMRESULT result; + + /* Reset the joystick ID & name mapping tables */ + for ( i = 0; i < MAX_JOYSTICKS; ++i ) { + SYS_JoystickID[i] = 0; + SYS_JoystickName[i] = NULL; + } + + /* Loop over all potential joystick devices */ + numdevs = 0; + maxdevs = joyGetNumDevs(); + for ( i = JOYSTICKID1; i < maxdevs && numdevs < MAX_JOYSTICKS; ++i ) { + + joyinfo.dwSize = sizeof(joyinfo); + joyinfo.dwFlags = JOY_RETURNALL; + result = joyGetPosEx(i, &joyinfo); + if ( result == JOYERR_NOERROR ) { + result = joyGetDevCaps(i, &joycaps, sizeof(joycaps)); + if ( result == JOYERR_NOERROR ) { + SYS_JoystickID[numdevs] = i; + SYS_Joystick[numdevs] = joycaps; + SYS_JoystickName[numdevs] = GetJoystickName(i, joycaps.szRegKey); + numdevs++; + } + } + } + return(numdevs); +} + +/* Function to get the device-dependent name of a joystick */ +const char *SDL_SYS_JoystickName(int index) +{ + if ( SYS_JoystickName[index] != NULL ) { + return(SYS_JoystickName[index]); + } else { + return(SYS_Joystick[index].szPname); + } +} + +/* Function to open a joystick for use. + The joystick to open is specified by the index field of the joystick. + This should fill the nbuttons and naxes fields of the joystick structure. + It returns 0, or -1 if there is an error. + */ +int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) +{ + int index, i; + int caps_flags[MAX_AXES-2] = + { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV }; + int axis_min[MAX_AXES], axis_max[MAX_AXES]; + + + /* shortcut */ + index = joystick->index; + axis_min[0] = SYS_Joystick[index].wXmin; + axis_max[0] = SYS_Joystick[index].wXmax; + axis_min[1] = SYS_Joystick[index].wYmin; + axis_max[1] = SYS_Joystick[index].wYmax; + axis_min[2] = SYS_Joystick[index].wZmin; + axis_max[2] = SYS_Joystick[index].wZmax; + axis_min[3] = SYS_Joystick[index].wRmin; + axis_max[3] = SYS_Joystick[index].wRmax; + axis_min[4] = SYS_Joystick[index].wUmin; + axis_max[4] = SYS_Joystick[index].wUmax; + axis_min[5] = SYS_Joystick[index].wVmin; + axis_max[5] = SYS_Joystick[index].wVmax; + + /* allocate memory for system specific hardware data */ + joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); + if (joystick->hwdata == NULL) + { + SDL_OutOfMemory(); + return(-1); + } + SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); + + /* set hardware data */ + joystick->hwdata->id = SYS_JoystickID[index]; + for ( i = 0; i < MAX_AXES; ++i ) { + if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) { + joystick->hwdata->transaxis[i].offset = + AXIS_MIN - axis_min[i]; + joystick->hwdata->transaxis[i].scale = + (float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]); + } else { + joystick->hwdata->transaxis[i].offset = 0; + joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */ + } + } + + /* fill nbuttons, naxes, and nhats fields */ + joystick->nbuttons = SYS_Joystick[index].wNumButtons; + joystick->naxes = SYS_Joystick[index].wNumAxes; + if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) { + joystick->nhats = 1; + } else { + joystick->nhats = 0; + } + return(0); +} + +static Uint8 TranslatePOV(DWORD value) +{ + Uint8 pos; + + pos = SDL_HAT_CENTERED; + if ( value != JOY_POVCENTERED ) { + if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) { + pos |= SDL_HAT_UP; + } + if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) { + pos |= SDL_HAT_RIGHT; + } + if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) { + pos |= SDL_HAT_DOWN; + } + if ( value > JOY_POVBACKWARD ) { + pos |= SDL_HAT_LEFT; + } + } + return(pos); +} + +/* Function to update the state of a joystick - called as a device poll. + * This function shouldn't update the joystick structure directly, + * but instead should call SDL_PrivateJoystick*() to deliver events + * and update joystick device state. + */ +void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) +{ + MMRESULT result; + int i; + DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ, + JOY_RETURNR, JOY_RETURNU, JOY_RETURNV }; + DWORD pos[MAX_AXES]; + struct _transaxis *transaxis; + int value, change; + JOYINFOEX joyinfo; + + joyinfo.dwSize = sizeof(joyinfo); + joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS; + if ( ! joystick->hats ) { + joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS); + } + result = joyGetPosEx(joystick->hwdata->id, &joyinfo); + if ( result != JOYERR_NOERROR ) { + SetMMerror("joyGetPosEx", result); + return; + } + + /* joystick motion events */ + pos[0] = joyinfo.dwXpos; + pos[1] = joyinfo.dwYpos; + pos[2] = joyinfo.dwZpos; + pos[3] = joyinfo.dwRpos; + pos[4] = joyinfo.dwUpos; + pos[5] = joyinfo.dwVpos; + + transaxis = joystick->hwdata->transaxis; + for (i = 0; i < joystick->naxes; i++) { + if (joyinfo.dwFlags & flags[i]) { + value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale); + change = (value - joystick->axes[i]); + if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) { + SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value); + } + } + } + + /* joystick button events */ + if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) { + for ( i = 0; i < joystick->nbuttons; ++i ) { + if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) { + if ( ! joystick->buttons[i] ) { + SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED); + } + } else { + if ( joystick->buttons[i] ) { + SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED); + } + } + } + } + + /* joystick hat events */ + if ( joyinfo.dwFlags & JOY_RETURNPOV ) { + Uint8 pos; + + pos = TranslatePOV(joyinfo.dwPOV); + if ( pos != joystick->hats[0] ) { + SDL_PrivateJoystickHat(joystick, 0, pos); + } + } +} + +/* Function to close a joystick after use */ +void SDL_SYS_JoystickClose(SDL_Joystick *joystick) +{ + if (joystick->hwdata != NULL) { + /* free system specific hardware data */ + SDL_free(joystick->hwdata); + joystick->hwdata = NULL; + } +} + +/* Function to perform any system-specific joystick related cleanup */ +void SDL_SYS_JoystickQuit(void) +{ + int i; + for (i = 0; i < MAX_JOYSTICKS; i++) { + if ( SYS_JoystickName[i] != NULL ) { + SDL_free(SYS_JoystickName[i]); + SYS_JoystickName[i] = NULL; + } + } +} + + +/* implementation functions */ +void SetMMerror(char *function, int code) +{ + static char *error; + static char errbuf[1024]; + + errbuf[0] = 0; + switch (code) + { + case MMSYSERR_NODRIVER: + error = "Joystick driver not present"; + break; + + case MMSYSERR_INVALPARAM: + case JOYERR_PARMS: + error = "Invalid parameter(s)"; + break; + + case MMSYSERR_BADDEVICEID: + error = "Bad device ID"; + break; + + case JOYERR_UNPLUGGED: + error = "Joystick not attached"; + break; + + case JOYERR_NOCANDO: + error = "Can't capture joystick input"; + break; + + default: + SDL_snprintf(errbuf, SDL_arraysize(errbuf), + "%s: Unknown Multimedia system error: 0x%x", + function, code); + break; + } + + if ( ! errbuf[0] ) { + SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error); + } + SDL_SetError("%s", errbuf); +} + +#endif /* SDL_JOYSTICK_WINMM */ |