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SDL_joystick.c
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
/* This is the joystick API for Simple DirectMedia Layer */
#include "SDL.h"
#include "SDL_events.h"
#include "SDL_sysjoystick.h"
#include "SDL_assert.h"
#include "SDL_hints.h"
#if !SDL_EVENTS_DISABLED
#include "../events/SDL_events_c.h"
#endif
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#include "../video/SDL_sysvideo.h"
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static SDL_bool SDL_joystick_allows_background_events = SDL_FALSE;
static SDL_Joystick *SDL_joysticks = NULL;
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static SDL_bool SDL_updating_joystick = SDL_FALSE;
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static SDL_mutex *SDL_joystick_lock = NULL; /* This needs to support recursive locks */
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void
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SDL_LockJoysticks(void)
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{
if (SDL_joystick_lock) {
SDL_LockMutex(SDL_joystick_lock);
}
}
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void
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SDL_UnlockJoysticks(void)
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{
if (SDL_joystick_lock) {
SDL_UnlockMutex(SDL_joystick_lock);
}
}
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static void SDLCALL
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SDL_JoystickAllowBackgroundEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
if (hint && *hint == '1') {
SDL_joystick_allows_background_events = SDL_TRUE;
} else {
SDL_joystick_allows_background_events = SDL_FALSE;
}
}
int
SDL_JoystickInit(void)
{
int status;
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SDL_GameControllerInitMappings();
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/* Create the joystick list lock */
if (!SDL_joystick_lock) {
SDL_joystick_lock = SDL_CreateMutex();
}
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/* See if we should allow joystick events while in the background */
SDL_AddHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
#if !SDL_EVENTS_DISABLED
if (SDL_InitSubSystem(SDL_INIT_EVENTS) < 0) {
return -1;
}
#endif /* !SDL_EVENTS_DISABLED */
status = SDL_SYS_JoystickInit();
if (status >= 0) {
status = 0;
}
return (status);
}
/*
* Count the number of joysticks attached to the system
*/
int
SDL_NumJoysticks(void)
{
return SDL_SYS_NumJoysticks();
}
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/*
* Perform any needed fixups for joystick names
*/
static const char *
SDL_FixupJoystickName(const char *name)
{
if (name) {
const char *skip_prefix = "NVIDIA Corporation ";
if (SDL_strncmp(name, skip_prefix, SDL_strlen(skip_prefix)) == 0) {
name += SDL_strlen(skip_prefix);
}
}
return name;
}
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/*
* Get the implementation dependent name of a joystick
*/
const char *
SDL_JoystickNameForIndex(int device_index)
{
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if (device_index < 0 || device_index >= SDL_NumJoysticks()) {
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SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
return (NULL);
}
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return SDL_FixupJoystickName(SDL_SYS_JoystickNameForDeviceIndex(device_index));
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}
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/*
* Return true if this joystick is known to have all axes centered at zero
* This isn't generally needed unless the joystick never generates an initial axis value near zero,
* e.g. it's emulating axes with digital buttons
*/
static SDL_bool
SDL_JoystickAxesCenteredAtZero(SDL_Joystick *joystick)
{
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static Uint32 zero_centered_joysticks[] = {
MAKE_VIDPID(0x0e8f, 0x3013), /* HuiJia SNES USB adapter */
MAKE_VIDPID(0x05a0, 0x3232), /* 8Bitdo Zero Gamepad */
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};
int i;
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Uint32 id = MAKE_VIDPID(SDL_JoystickGetVendor(joystick),
SDL_JoystickGetProduct(joystick));
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/*printf("JOYSTICK '%s' VID/PID 0x%.4x/0x%.4x AXES: %d\n", joystick->name, vendor, product, joystick->naxes);*/
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if (joystick->naxes == 2) {
/* Assume D-pad or thumbstick style axes are centered at 0 */
return SDL_TRUE;
}
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for (i = 0; i < SDL_arraysize(zero_centered_joysticks); ++i) {
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if (id == zero_centered_joysticks[i]) {
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return SDL_TRUE;
}
}
return SDL_FALSE;
}
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/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *
SDL_JoystickOpen(int device_index)
{
SDL_Joystick *joystick;
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
return (NULL);
}
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SDL_LockJoysticks();
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joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
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* it is important that we have a single joystick * for each instance id
*/
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while (joysticklist) {
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if (SDL_JoystickGetDeviceInstanceID(device_index) == joysticklist->instance_id) {
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joystick = joysticklist;
++joystick->ref_count;
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SDL_UnlockJoysticks();
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return (joystick);
}
joysticklist = joysticklist->next;
}
/* Create and initialize the joystick */
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joystick = (SDL_Joystick *) SDL_calloc(sizeof(*joystick), 1);
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if (joystick == NULL) {
SDL_OutOfMemory();
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SDL_UnlockJoysticks();
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return NULL;
}
if (SDL_SYS_JoystickOpen(joystick, device_index) < 0) {
SDL_free(joystick);
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SDL_UnlockJoysticks();
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return NULL;
}
joystickname = SDL_SYS_JoystickNameForDeviceIndex(device_index);
if (joystickname)
joystick->name = SDL_strdup(joystickname);
else
joystick->name = NULL;
if (joystick->naxes > 0) {
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joystick->axes = (SDL_JoystickAxisInfo *) SDL_calloc(joystick->naxes, sizeof(SDL_JoystickAxisInfo));
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}
if (joystick->nhats > 0) {
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joystick->hats = (Uint8 *) SDL_calloc(joystick->nhats, sizeof(Uint8));
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}
if (joystick->nballs > 0) {
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joystick->balls = (struct balldelta *) SDL_calloc(joystick->nballs, sizeof(*joystick->balls));
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}
if (joystick->nbuttons > 0) {
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joystick->buttons = (Uint8 *) SDL_calloc(joystick->nbuttons, sizeof(Uint8));
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}
if (((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
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SDL_UnlockJoysticks();
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return NULL;
}
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joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
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/* If this joystick is known to have all zero centered axes, skip the auto-centering code */
if (SDL_JoystickAxesCenteredAtZero(joystick)) {
int i;
for (i = 0; i < joystick->naxes; ++i) {
joystick->axes[i].has_initial_value = SDL_TRUE;
}
}
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joystick->is_game_controller = SDL_IsGameController(device_index);
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/* Add joystick to list */
++joystick->ref_count;
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
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SDL_UnlockJoysticks();
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SDL_SYS_JoystickUpdate(joystick);
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return (joystick);
}
/*
* Checks to make sure the joystick is valid.
*/
int
SDL_PrivateJoystickValid(SDL_Joystick * joystick)
{
int valid;
if (joystick == NULL) {
SDL_SetError("Joystick hasn't been opened yet");
valid = 0;
} else {
valid = 1;
}
return valid;
}
/*
* Get the number of multi-dimensional axis controls on a joystick
*/
int
SDL_JoystickNumAxes(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (-1);
}
return (joystick->naxes);
}
/*
* Get the number of hats on a joystick
*/
int
SDL_JoystickNumHats(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (-1);
}
return (joystick->nhats);
}
/*
* Get the number of trackballs on a joystick
*/
int
SDL_JoystickNumBalls(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (-1);
}
return (joystick->nballs);
}
/*
* Get the number of buttons on a joystick
*/
int
SDL_JoystickNumButtons(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (-1);
}
return (joystick->nbuttons);
}
/*
* Get the current state of an axis control on a joystick
*/
Sint16
SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis)
{
Sint16 state;
if (!SDL_PrivateJoystickValid(joystick)) {
return (0);
}
if (axis < joystick->naxes) {
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state = joystick->axes[axis].value;
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} else {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
state = 0;
}
return (state);
}
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/*
* Get the initial state of an axis control on a joystick
*/
SDL_bool
SDL_JoystickGetAxisInitialState(SDL_Joystick * joystick, int axis, Sint16 *state)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return SDL_FALSE;
}
if (axis >= joystick->naxes) {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
return SDL_FALSE;
}
if (state) {
*state = joystick->axes[axis].initial_value;
}
return joystick->axes[axis].has_initial_value;
}
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/*
* Get the current state of a hat on a joystick
*/
Uint8
SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
return (0);
}
if (hat < joystick->nhats) {
state = joystick->hats[hat];
} else {
SDL_SetError("Joystick only has %d hats", joystick->nhats);
state = 0;
}
return (state);
}
/*
* Get the ball axis change since the last poll
*/
int
SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy)
{
int retval;
if (!SDL_PrivateJoystickValid(joystick)) {
return (-1);
}
retval = 0;
if (ball < joystick->nballs) {
if (dx) {
*dx = joystick->balls[ball].dx;
}
if (dy) {
*dy = joystick->balls[ball].dy;
}
joystick->balls[ball].dx = 0;
joystick->balls[ball].dy = 0;
} else {
return SDL_SetError("Joystick only has %d balls", joystick->nballs);
}
return (retval);
}
/*
* Get the current state of a button on a joystick
*/
Uint8
SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
return (0);
}
if (button < joystick->nbuttons) {
state = joystick->buttons[button];
} else {
SDL_SetError("Joystick only has %d buttons", joystick->nbuttons);
state = 0;
}
return (state);
}
/*
* Return if the joystick in question is currently attached to the system,
* \return SDL_FALSE if not plugged in, SDL_TRUE if still present.
*/
SDL_bool
SDL_JoystickGetAttached(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return SDL_FALSE;
}
return SDL_SYS_JoystickAttached(joystick);
}
/*
* Get the instance id for this opened joystick
*/
SDL_JoystickID
SDL_JoystickInstanceID(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (-1);
}
return (joystick->instance_id);
}
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/*
* Find the SDL_Joystick that owns this instance id
*/
SDL_Joystick *
SDL_JoystickFromInstanceID(SDL_JoystickID joyid)
{
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SDL_Joystick *joystick;
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SDL_LockJoysticks();
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for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
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if (joystick->instance_id == joyid) {
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SDL_UnlockJoysticks();
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return joystick;
}
}
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SDL_UnlockJoysticks();
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return NULL;
}
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/*
* Get the friendly name of this joystick
*/
const char *
SDL_JoystickName(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (NULL);
}
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return SDL_FixupJoystickName(joystick->name);
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}
/*
* Close a joystick previously opened with SDL_JoystickOpen()
*/
void
SDL_JoystickClose(SDL_Joystick * joystick)
{
SDL_Joystick *joysticklist;
SDL_Joystick *joysticklistprev;
if (!joystick) {
return;
}
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SDL_LockJoysticks();
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/* First decrement ref count */
if (--joystick->ref_count > 0) {
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SDL_UnlockJoysticks();
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return;
}
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if (SDL_updating_joystick) {
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SDL_UnlockJoysticks();
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return;
}
SDL_SYS_JoystickClose(joystick);
joystick->hwdata = NULL;
joysticklist = SDL_joysticks;
joysticklistprev = NULL;
while (joysticklist) {
if (joystick == joysticklist) {
if (joysticklistprev) {
/* unlink this entry */
joysticklistprev->next = joysticklist->next;
} else {
SDL_joysticks = joystick->next;
}
break;
}
joysticklistprev = joysticklist;
joysticklist = joysticklist->next;
}
SDL_free(joystick->name);
/* Free the data associated with this joystick */
SDL_free(joystick->axes);
SDL_free(joystick->hats);
SDL_free(joystick->balls);
SDL_free(joystick->buttons);
SDL_free(joystick);
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SDL_UnlockJoysticks();
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}
void
SDL_JoystickQuit(void)
{
/* Make sure we're not getting called in the middle of updating joysticks */
SDL_assert(!SDL_updating_joystick);
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SDL_LockJoysticks();
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/* Stop the event polling */
while (SDL_joysticks) {
SDL_joysticks->ref_count = 1;
SDL_JoystickClose(SDL_joysticks);
}
/* Quit the joystick setup */
SDL_SYS_JoystickQuit();
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SDL_UnlockJoysticks();
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#if !SDL_EVENTS_DISABLED
SDL_QuitSubSystem(SDL_INIT_EVENTS);
#endif
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SDL_DelHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
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if (SDL_joystick_lock) {
SDL_DestroyMutex(SDL_joystick_lock);
SDL_joystick_lock = NULL;
}
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SDL_GameControllerQuitMappings();
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}
static SDL_bool
SDL_PrivateJoystickShouldIgnoreEvent()
{
if (SDL_joystick_allows_background_events) {
return SDL_FALSE;
}
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if (SDL_HasWindows() && SDL_GetKeyboardFocus() == NULL) {
/* We have windows but we don't have focus, ignore the event. */
return SDL_TRUE;
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}
return SDL_FALSE;
}
/* These are global for SDL_sysjoystick.c and SDL_events.c */
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void SDL_PrivateJoystickAdded(int device_index)
{
#if !SDL_EVENTS_DISABLED
SDL_Event event;
event.type = SDL_JOYDEVICEADDED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = device_index;
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SDL_PushEvent(&event);
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}
#endif /* !SDL_EVENTS_DISABLED */
}
/*
* If there is an existing add event in the queue, it needs to be modified
* to have the right value for which, because the number of controllers in
* the system is now one less.
*/
static void UpdateEventsForDeviceRemoval()
{
int i, num_events;
SDL_Event *events;
num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_JOYDEVICEADDED, SDL_JOYDEVICEADDED);
if (num_events <= 0) {
return;
}
events = SDL_stack_alloc(SDL_Event, num_events);
if (!events) {
return;
}
num_events = SDL_PeepEvents(events, num_events, SDL_GETEVENT, SDL_JOYDEVICEADDED, SDL_JOYDEVICEADDED);
for (i = 0; i < num_events; ++i) {
--events[i].jdevice.which;
}
SDL_PeepEvents(events, num_events, SDL_ADDEVENT, 0, 0);
SDL_stack_free(events);
}
void SDL_PrivateJoystickRemoved(SDL_JoystickID device_instance)
{
#if !SDL_EVENTS_DISABLED
SDL_Event event;
event.type = SDL_JOYDEVICEREMOVED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = device_instance;
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SDL_PushEvent(&event);
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}
UpdateEventsForDeviceRemoval();
#endif /* !SDL_EVENTS_DISABLED */
}
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int
SDL_PrivateJoystickAxis(SDL_Joystick * joystick, Uint8 axis, Sint16 value)
{
int posted;
/* Make sure we're not getting garbage or duplicate events */
if (axis >= joystick->naxes) {
return 0;
}
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if (!joystick->axes[axis].has_initial_value) {
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joystick->axes[axis].initial_value = value;
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joystick->axes[axis].value = value;
joystick->axes[axis].zero = value;
joystick->axes[axis].has_initial_value = SDL_TRUE;
}
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if (value == joystick->axes[axis].value) {
return 0;
}
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if (!joystick->axes[axis].sent_initial_value) {
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/* Make sure we don't send motion until there's real activity on this axis */
const int MAX_ALLOWED_JITTER = SDL_JOYSTICK_AXIS_MAX / 80; /* ShanWan PS3 controller needed 96 */
if (SDL_abs(value - joystick->axes[axis].value) <= MAX_ALLOWED_JITTER) {
return 0;
}
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joystick->axes[axis].sent_initial_value = SDL_TRUE;
joystick->axes[axis].value = value; /* Just so we pass the check above */
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SDL_PrivateJoystickAxis(joystick, axis, joystick->axes[axis].initial_value);
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}
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/* We ignore events if we don't have keyboard focus, except for centering
* events.
*/
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
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if ((value > joystick->axes[axis].zero && value >= joystick->axes[axis].value) ||
(value < joystick->axes[axis].zero && value <= joystick->axes[axis].value)) {
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return 0;
}
}
/* Update internal joystick state */
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joystick->axes[axis].value = value;
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/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_JOYAXISMOTION) == SDL_ENABLE) {
SDL_Event event;
event.type = SDL_JOYAXISMOTION;
event.jaxis.which = joystick->instance_id;
event.jaxis.axis = axis;
event.jaxis.value = value;
posted = SDL_PushEvent(&event) == 1;
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
int
SDL_PrivateJoystickHat(SDL_Joystick * joystick, Uint8 hat, Uint8 value)
{
int posted;
/* Make sure we're not getting garbage or duplicate events */
if (hat >= joystick->nhats) {
return 0;
}
if (value == joystick->hats[hat]) {
return 0;
}
/* We ignore events if we don't have keyboard focus, except for centering
* events.
*/
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
if (value != SDL_HAT_CENTERED) {
return 0;
}
}
/* Update internal joystick state */
joystick->hats[hat] = value;
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_JOYHATMOTION) == SDL_ENABLE) {
SDL_Event event;
event.jhat.type = SDL_JOYHATMOTION;
event.jhat.which = joystick->instance_id;
event.jhat.hat = hat;
event.jhat.value = value;
posted = SDL_PushEvent(&event) == 1;
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
int
SDL_PrivateJoystickBall(SDL_Joystick * joystick, Uint8 ball,
Sint16 xrel, Sint16 yrel)
{
int posted;
/* Make sure we're not getting garbage events */
if (ball >= joystick->nballs) {
return 0;
}
/* We ignore events if we don't have keyboard focus. */
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
return 0;
}
/* Update internal mouse state */
joystick->balls[ball].dx += xrel;
joystick->balls[ball].dy += yrel;
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_JOYBALLMOTION) == SDL_ENABLE) {
SDL_Event event;
event.jball.type = SDL_JOYBALLMOTION;
event.jball.which = joystick->instance_id;
event.jball.ball = ball;
event.jball.xrel = xrel;
event.jball.yrel = yrel;
posted = SDL_PushEvent(&event) == 1;
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
int
SDL_PrivateJoystickButton(SDL_Joystick * joystick, Uint8 button, Uint8 state)
{
int posted;
#if !SDL_EVENTS_DISABLED
SDL_Event event;
switch (state) {
case SDL_PRESSED:
event.type = SDL_JOYBUTTONDOWN;
break;
case SDL_RELEASED:
event.type = SDL_JOYBUTTONUP;
break;
default:
/* Invalid state -- bail */
return (0);
}
#endif /* !SDL_EVENTS_DISABLED */
/* Make sure we're not getting garbage or duplicate events */
if (button >= joystick->nbuttons) {
return 0;
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}
if (state == joystick->buttons[button]) {
return 0;
}
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/* We ignore events if we don't have keyboard focus, except for button
* release. */
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
if (state == SDL_PRESSED) {
return 0;
}
}
/* Update internal joystick state */
joystick->buttons[button] = state;
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jbutton.which = joystick->instance_id;
event.jbutton.button = button;
event.jbutton.state = state;
posted = SDL_PushEvent(&event) == 1;
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
void
SDL_JoystickUpdate(void)
{
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SDL_Joystick *joystick;
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SDL_LockJoysticks();
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if (SDL_updating_joystick) {
/* The joysticks are already being updated */
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SDL_UnlockJoysticks();
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return;
}
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SDL_updating_joystick = SDL_TRUE;
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/* Make sure the list is unlocked while dispatching events to prevent application deadlocks */
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SDL_UnlockJoysticks();
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for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
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SDL_SYS_JoystickUpdate(joystick);
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if (joystick->delayed_guide_button) {
SDL_GameControllerHandleDelayedGuideButton(joystick);
}
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if (joystick->force_recentering) {
int i;
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/* Tell the app that everything is centered/unpressed... */
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for (i = 0; i < joystick->naxes; i++) {
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if (joystick->axes[i].has_initial_value) {
SDL_PrivateJoystickAxis(joystick, i, joystick->axes[i].zero);
}
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}
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for (i = 0; i < joystick->nbuttons; i++) {
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SDL_PrivateJoystickButton(joystick, i, 0);
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}
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for (i = 0; i < joystick->nhats; i++) {
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SDL_PrivateJoystickHat(joystick, i, SDL_HAT_CENTERED);
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}
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joystick->force_recentering = SDL_FALSE;
}
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}
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SDL_LockJoysticks();
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SDL_updating_joystick = SDL_FALSE;
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/* If any joysticks were closed while updating, free them here */
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
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if (joystick->ref_count <= 0) {
SDL_JoystickClose(joystick);
}
}
/* this needs to happen AFTER walking the joystick list above, so that any
dangling hardware data from removed devices can be free'd
*/
SDL_SYS_JoystickDetect();
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SDL_UnlockJoysticks();
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}
int
SDL_JoystickEventState(int state)
{
#if SDL_EVENTS_DISABLED
return SDL_DISABLE;
#else
const Uint32 event_list[] = {
SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYHATMOTION,
SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP, SDL_JOYDEVICEADDED, SDL_JOYDEVICEREMOVED
};
unsigned int i;
switch (state) {
case SDL_QUERY:
state = SDL_DISABLE;
for (i = 0; i < SDL_arraysize(event_list); ++i) {
state = SDL_EventState(event_list[i], SDL_QUERY);
if (state == SDL_ENABLE) {
break;
}
}
break;
default:
for (i = 0; i < SDL_arraysize(event_list); ++i) {
SDL_EventState(event_list[i], state);
}
break;
}
return (state);
#endif /* SDL_EVENTS_DISABLED */
}
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void SDL_GetJoystickGUIDInfo(SDL_JoystickGUID guid, Uint16 *vendor, Uint16 *product, Uint16 *version)
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{
Uint16 *guid16 = (Uint16 *)guid.data;
/* If the GUID fits the form of BUS 0000 VENDOR 0000 PRODUCT 0000, return the data */
if (/* guid16[0] is device bus type */
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guid16[1] == 0x0000 &&
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/* guid16[2] is vendor ID */
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guid16[3] == 0x0000 &&
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/* guid16[4] is product ID */
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guid16[5] == 0x0000
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/* guid16[6] is product version */
) {
if (vendor) {
*vendor = guid16[2];
}
if (product) {
*product = guid16[4];
}
if (version) {
*version = guid16[6];
}
} else {
if (vendor) {
*vendor = 0;
}
if (product) {
*product = 0;
}
if (version) {
*version = 0;
}
}
}
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static SDL_bool SDL_IsJoystickProductWheel(Uint32 vidpid)
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{
static Uint32 wheel_joysticks[] = {
MAKE_VIDPID(0x046d, 0xc294), /* Logitech generic wheel */
MAKE_VIDPID(0x046d, 0xc295), /* Logitech Momo Force */
MAKE_VIDPID(0x046d, 0xc298), /* Logitech Driving Force Pro */
MAKE_VIDPID(0x046d, 0xc299), /* Logitech G25 */
MAKE_VIDPID(0x046d, 0xc29a), /* Logitech Driving Force GT */
MAKE_VIDPID(0x046d, 0xc29b), /* Logitech G27 */
MAKE_VIDPID(0x046d, 0xc261), /* Logitech G920 (initial mode) */
MAKE_VIDPID(0x046d, 0xc262), /* Logitech G920 (active mode) */
MAKE_VIDPID(0x044f, 0xb65d), /* Thrustmaster Wheel FFB */