From ebba656bdbb634e590a4be8e3e847fa26dcd9803 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Thu, 24 Jul 2025 10:35:38 -0700 Subject: [PATCH] Added Steam Virtual Gamepad support to the GameInput driver (cherry picked from commit 66dad9c21f62db17bfde2a8b6f3debb18f6e1e79) --- src/joystick/gdk/SDL_gameinputjoystick.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/src/joystick/gdk/SDL_gameinputjoystick.c b/src/joystick/gdk/SDL_gameinputjoystick.c index 6cf0a902b7..1e729b9352 100644 --- a/src/joystick/gdk/SDL_gameinputjoystick.c +++ b/src/joystick/gdk/SDL_gameinputjoystick.c @@ -46,6 +46,7 @@ typedef struct GAMEINPUT_InternalDevice SDL_GUID guid; // generated by SDL SDL_JoystickID device_instance; // generated by SDL const GameInputDeviceInfo *info; + int steam_virtual_gamepad_slot; bool isAdded; bool isDeleteRequested; } GAMEINPUT_InternalDevice; @@ -77,6 +78,16 @@ static bool GAMEINPUT_InternalIsGamepad(const GameInputDeviceInfo *info) return false; } +static int GetSteamVirtualGamepadSlot(const char *device_path) +{ + int slot = -1; + + // The format for the raw input device path is documented here: + // https://partner.steamgames.com/doc/features/steam_controller/steam_input_gamepad_emulation_bestpractices + (void)SDL_sscanf(device_path, "\\\\.\\pipe\\HID#VID_045E&PID_028E&IG_00#%*X&%*X&%*X#%d#%*u", &slot); + return slot; +} + static bool GAMEINPUT_InternalAddOrFind(IGameInputDevice *pDevice) { GAMEINPUT_InternalDevice **devicelist = NULL; @@ -147,6 +158,7 @@ static bool GAMEINPUT_InternalAddOrFind(IGameInputDevice *pDevice) elem->guid = SDL_CreateJoystickGUID(bus, vendor, product, version, manufacturer_string, product_string, 'g', 0); elem->device_instance = SDL_GetNextObjectID(); elem->info = info; + elem->steam_virtual_gamepad_slot = GetSteamVirtualGamepadSlot(info->pnpPath); g_GameInputList.devices = devicelist; g_GameInputList.devices[g_GameInputList.count++] = elem; @@ -333,7 +345,7 @@ static const char *GAMEINPUT_JoystickGetDevicePath(int device_index) static int GAMEINPUT_JoystickGetDeviceSteamVirtualGamepadSlot(int device_index) { - return -1; + return GAMEINPUT_InternalFindByIndex(device_index)->steam_virtual_gamepad_slot; } static int GAMEINPUT_JoystickGetDevicePlayerIndex(int device_index)