From 52243c2ff49b13cb10ac9b35059a77c4b63398a8 Mon Sep 17 00:00:00 2001
From: Felipe Jorge <felipe.jorge.pereira@gmail.com>
Date: Tue, 15 Jul 2025 11:59:33 -0300
Subject: [PATCH] Win32: Update GUID for SDL newer format

---
 src/win32_init.c     |  3 +++
 src/win32_joystick.c | 29 +++++++++++++++++++++++++----
 src/win32_platform.h | 16 ++++++++++++++++
 3 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/src/win32_init.c b/src/win32_init.c
index 6b6e9d08..3a2cc0b7 100644
--- a/src/win32_init.c
+++ b/src/win32_init.c
@@ -126,6 +126,9 @@ static GLFWbool loadLibraries(void)
             {
                 _glfw.win32.xinput.GetCapabilities = (PFN_XInputGetCapabilities)
                     _glfwPlatformGetModuleSymbol(_glfw.win32.xinput.instance, "XInputGetCapabilities");
+                // 108 is the ordinal for _XInputGetCapabilitiesEx, which additionally returns VID/PID of the controller.
+                _glfw.win32.xinput.GetCapabilitiesEx = (PFN_XInputGetCapabilitiesEx)
+                    _glfwPlatformGetModuleSymbol(_glfw.win32.xinput.instance, (LPCSTR)108);
                 _glfw.win32.xinput.GetState = (PFN_XInputGetState)
                     _glfwPlatformGetModuleSymbol(_glfw.win32.xinput.instance, "XInputGetState");
 
diff --git a/src/win32_joystick.c b/src/win32_joystick.c
index 6703485e..9dd239a3 100644
--- a/src/win32_joystick.c
+++ b/src/win32_joystick.c
@@ -519,12 +519,33 @@ void _glfwDetectJoystickConnectionWin32(void)
             if (jid <= GLFW_JOYSTICK_LAST)
                 continue;
 
-            if (XInputGetCapabilities(index, 0, &xic) != ERROR_SUCCESS)
+            if (XInputGetCapabilities(index, XINPUT_FLAG_GAMEPAD, &xic) != ERROR_SUCCESS)
                 continue;
 
-            // Generate a joystick GUID that matches the SDL 2.0.5+ one
-            sprintf(guid, "78696e707574%02x000000000000000000",
-                    xic.SubType & 0xff);
+            GLFW_XINPUT_CAPABILITIES_EX xic_ex;
+            if (!XInputGetCapabilitiesEx || XInputGetCapabilitiesEx(1, index, 0, &xic_ex) != ERROR_SUCCESS)
+            {
+                // use a generic VID/PID representing an XInput controller
+                xic_ex.VendorId = USB_VENDOR_MICROSOFT;
+                xic_ex.ProductId = USB_PRODUCT_XBOX360_XUSB_CONTROLLER;
+                xic_ex.VersionNumber = 0;
+            }
+            else
+            {
+                // fixup for Wireless Xbox 360 Controller
+                if (xic_ex.ProductId == 0 && xic_ex.Capabilities.Flags & XINPUT_CAPS_WIRELESS)
+                {
+                    xic_ex.VendorId = USB_VENDOR_MICROSOFT;
+                    xic_ex.ProductId = USB_PRODUCT_XBOX360_XUSB_CONTROLLER;
+                }
+            }
+
+            // Generate a joystick GUID that matches the SDL one
+            // SDL_xinputjoystick.c:207
+            uint8_t* vid = (uint8_t*)&xic_ex.VendorId;
+            uint8_t* pid = (uint8_t*)&xic_ex.ProductId;
+            uint8_t* ver = (uint8_t*)&xic_ex.VersionNumber;
+            sprintf(guid, "03000000%02x%02x0000%02x%02x0000%02x%02x0000", vid[0], vid[1], pid[0], pid[1], ver[0], ver[1]);
 
             js = _glfwAllocJoystick(getDeviceDescription(&xic), guid, 6, 10, 1);
             if (!js)
diff --git a/src/win32_platform.h b/src/win32_platform.h
index 49cceba6..f45bcfea 100644
--- a/src/win32_platform.h
+++ b/src/win32_platform.h
@@ -216,11 +216,26 @@ typedef enum
 #define ERROR_INVALID_PROFILE_ARB 0x2096
 #define ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB 0x2054
 
+// this struct might not defined in XInput headers
+typedef struct
+{
+    XINPUT_CAPABILITIES Capabilities;
+    WORD VendorId;
+    WORD ProductId;
+    WORD VersionNumber;
+    WORD unk1;
+    DWORD unk2;
+} GLFW_XINPUT_CAPABILITIES_EX;
+
 // xinput.dll function pointer typedefs
 typedef DWORD (WINAPI * PFN_XInputGetCapabilities)(DWORD,DWORD,XINPUT_CAPABILITIES*);
+typedef DWORD (WINAPI * PFN_XInputGetCapabilitiesEx)(DWORD,DWORD,DWORD,GLFW_XINPUT_CAPABILITIES_EX*);
 typedef DWORD (WINAPI * PFN_XInputGetState)(DWORD,XINPUT_STATE*);
 #define XInputGetCapabilities _glfw.win32.xinput.GetCapabilities
+#define XInputGetCapabilitiesEx _glfw.win32.xinput.GetCapabilitiesEx
 #define XInputGetState _glfw.win32.xinput.GetState
+#define USB_VENDOR_MICROSOFT                 0x045e
+#define USB_PRODUCT_XBOX360_XUSB_CONTROLLER  0x02a1 // XUSB driver software PID
 
 // dinput8.dll function pointer typedefs
 typedef HRESULT (WINAPI * PFN_DirectInput8Create)(HINSTANCE,DWORD,REFIID,LPVOID*,LPUNKNOWN);
@@ -412,6 +427,7 @@ typedef struct _GLFWlibraryWin32
     struct {
         HINSTANCE                       instance;
         PFN_XInputGetCapabilities       GetCapabilities;
+        PFN_XInputGetCapabilitiesEx     GetCapabilitiesEx;
         PFN_XInputGetState              GetState;
     } xinput;