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Added Steam Input API support for game controllers

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Added support for getting the real controller info, as well as the function SDL_GameControllerGetSteamHandle() to get the Steam Input API handle, from the virtual gamepads provided by Steam.

Also added an event SDL_CONTROLLERSTEAMHANDLEUPDATED which is triggered when a controller's API handle changes, e.g. the controllers were reassigned slots in the Steam UI.

(cherry picked from commit c981a597dc)
This commit is contained in:
Sam Lantinga 2023-12-09 23:05:34 -08:00
parent 9720672374
commit 7bb0e839a6
41 changed files with 827 additions and 49 deletions
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38
src/joystick/linux/SDL_sysjoystick.c
View file

@ -221,14 +221,18 @@ static SDL_bool IsVirtualJoystick(Uint16 vendor, Uint16 product, Uint16 version,
}
#endif /* SDL_JOYSTICK_HIDAPI */
static SDL_bool GetVirtualGamepadSlot(const char *name, int *slot)
static SDL_bool GetSteamVirtualGamepadSlot(int fd, int *slot)
{
const char *digits = SDL_strstr(name, "pad ");
if (digits) {
digits += 4;
if (SDL_isdigit(*digits)) {
*slot = SDL_atoi(digits);
return SDL_TRUE;
char name[128];
if (ioctl(fd, EVIOCGNAME(sizeof(name)), name) > 0) {
const char *digits = SDL_strstr(name, "pad ");
if (digits) {
digits += 4;
if (SDL_isdigit(*digits)) {
*slot = SDL_atoi(digits);
return SDL_TRUE;
}
}
}
return SDL_FALSE;
@ -441,7 +445,6 @@ static void MaybeAddDevice(const char *path)
#ifdef DEBUG_INPUT_EVENTS
SDL_Log("found joystick: %s\n", path);
#endif
close(fd);
item = (SDL_joylist_item *)SDL_calloc(1, sizeof(SDL_joylist_item));
if (!item) {
SDL_free(name);
@ -456,7 +459,7 @@ static void MaybeAddDevice(const char *path)
if (vendor == USB_VENDOR_VALVE &&
product == USB_PRODUCT_STEAM_VIRTUAL_GAMEPAD) {
GetVirtualGamepadSlot(item->name, &item->steam_virtual_gamepad_slot);
GetSteamVirtualGamepadSlot(fd, &item->steam_virtual_gamepad_slot);
}
if ((!item->path) || (!item->name)) {
@ -483,7 +486,6 @@ static void MaybeAddDevice(const char *path)
#ifdef DEBUG_INPUT_EVENTS
SDL_Log("found sensor: %s\n", path);
#endif
close(fd);
item_sensor = (SDL_sensorlist_item *)SDL_calloc(1, sizeof(SDL_sensorlist_item));
if (!item_sensor) {
goto done;
@ -501,8 +503,10 @@ static void MaybeAddDevice(const char *path)
goto done;
}
close(fd);
done:
if (fd >= 0) {
close(fd);
}
SDL_UnlockJoysticks();
}
@ -870,7 +874,6 @@ static void LINUX_ScanSteamVirtualGamepads(void)
int fd;
struct dirent **entries = NULL;
char path[PATH_MAX];
char name[128];
struct input_id inpid;
int num_virtual_gamepads = 0;
int virtual_gamepad_slot;
@ -885,8 +888,7 @@ static void LINUX_ScanSteamVirtualGamepads(void)
if (ioctl(fd, EVIOCGID, &inpid) == 0 &&
inpid.vendor == USB_VENDOR_VALVE &&
inpid.product == USB_PRODUCT_STEAM_VIRTUAL_GAMEPAD &&
ioctl(fd, EVIOCGNAME(sizeof(name)), name) > 0 &&
GetVirtualGamepadSlot(name, &virtual_gamepad_slot)) {
GetSteamVirtualGamepadSlot(fd, &virtual_gamepad_slot)) {
VirtualGamepadEntry *new_virtual_gamepads = (VirtualGamepadEntry *)SDL_realloc(virtual_gamepads, (num_virtual_gamepads + 1) * sizeof(*virtual_gamepads));
if (new_virtual_gamepads) {
VirtualGamepadEntry *entry = &new_virtual_gamepads[num_virtual_gamepads];
@ -1112,11 +1114,16 @@ static const char *LINUX_JoystickGetDevicePath(int device_index)
return JoystickByDevIndex(device_index)->path;
}
static int LINUX_JoystickGetDevicePlayerIndex(int device_index)
static int LINUX_JoystickGetDeviceSteamVirtualGamepadSlot(int device_index)
{
return JoystickByDevIndex(device_index)->steam_virtual_gamepad_slot;
}
static int LINUX_JoystickGetDevicePlayerIndex(int device_index)
{
return -1;
}
static void LINUX_JoystickSetDevicePlayerIndex(int device_index, int player_index)
{
}
@ -2736,6 +2743,7 @@ SDL_JoystickDriver SDL_LINUX_JoystickDriver = {
LINUX_JoystickDetect,
LINUX_JoystickGetDeviceName,
LINUX_JoystickGetDevicePath,
LINUX_JoystickGetDeviceSteamVirtualGamepadSlot,
LINUX_JoystickGetDevicePlayerIndex,
LINUX_JoystickSetDevicePlayerIndex,
LINUX_JoystickGetDeviceGUID,