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authorJesse Hall <jessehall@google.com>2012-07-09 11:27:07 -0700
committerJesse Hall <jessehall@google.com>2012-07-22 00:35:08 -0700
commit9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f (patch)
treeded6ee18c4e1f33df235e53615a6d65e2d64f4ef /distrib/sdl-1.2.15/src/joystick/win32/SDL_mmjoystick.c
parent74b55003f76dbca96e4a26d98fe464081ca5341f (diff)
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Import SDL release-1.2.15
Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf
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.c407
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, &regsize);
+ 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, &regsize);
+ 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, &regsize);
+ }
+ }
+ 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 */