2 files changed, 186 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/core/gdk/SDL_gdk.cpp b/contrib/SDL-3.2.8/src/core/gdk/SDL_gdk.cpp
new file mode 100644
index 0000000..738daa5
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/core/gdk/SDL_gdk.cpp
@@ -0,0 +1,159 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  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"
+
+extern "C" {
+#include "../windows/SDL_windows.h"
+#include "../../events/SDL_events_c.h"
+}
+#include <XGameRuntime.h>
+#include <xsapi-c/services_c.h>
+#include <appnotify.h>
+
+static XTaskQueueHandle GDK_GlobalTaskQueue;
+
+PAPPSTATE_REGISTRATION hPLM = {};
+PAPPCONSTRAIN_REGISTRATION hCPLM = {};
+HANDLE plmSuspendComplete = nullptr;
+
+extern "C"
+bool SDL_GetGDKTaskQueue(XTaskQueueHandle *outTaskQueue)
+{
+    // If this is the first call, first create the global task queue.
+    if (!GDK_GlobalTaskQueue) {
+        HRESULT hr;
+
+        hr = XTaskQueueCreate(XTaskQueueDispatchMode::ThreadPool,
+                              XTaskQueueDispatchMode::Manual,
+                              &GDK_GlobalTaskQueue);
+        if (FAILED(hr)) {
+            return SDL_SetError("[GDK] Could not create global task queue");
+        }
+
+        // The initial call gets the non-duplicated handle so they can clean it up
+        *outTaskQueue = GDK_GlobalTaskQueue;
+    } else {
+        // Duplicate the global task queue handle into outTaskQueue
+        if (FAILED(XTaskQueueDuplicateHandle(GDK_GlobalTaskQueue, outTaskQueue))) {
+            return SDL_SetError("[GDK] Unable to acquire global task queue");
+        }
+    }
+
+    return true;
+}
+
+extern "C"
+void GDK_DispatchTaskQueue(void)
+{
+    /* If there is no global task queue, don't do anything.
+     * This gives the option to opt-out for those who want to handle everything themselves.
+     */
+    if (GDK_GlobalTaskQueue) {
+        // Dispatch any callbacks which are ready.
+        while (XTaskQueueDispatch(GDK_GlobalTaskQueue, XTaskQueuePort::Completion, 0))
+            ;
+    }
+}
+
+extern "C"
+bool GDK_RegisterChangeNotifications(void)
+{
+    // Register suspend/resume handling
+    plmSuspendComplete = CreateEventEx(nullptr, nullptr, 0, EVENT_MODIFY_STATE | SYNCHRONIZE);
+    if (!plmSuspendComplete) {
+        return SDL_SetError("[GDK] Unable to create plmSuspendComplete event");
+    }
+    auto rascn = [](BOOLEAN quiesced, PVOID context) {
+        SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "[GDK] in RegisterAppStateChangeNotification handler");
+        if (quiesced) {
+            ResetEvent(plmSuspendComplete);
+            SDL_SendAppEvent(SDL_EVENT_DID_ENTER_BACKGROUND);
+
+            // To defer suspension, we must wait to exit this callback.
+            // IMPORTANT: The app must call SDL_GDKSuspendComplete() to release this lock.
+            (void)WaitForSingleObject(plmSuspendComplete, INFINITE);
+
+            SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "[GDK] in RegisterAppStateChangeNotification handler: plmSuspendComplete event signaled.");
+        } else {
+            SDL_SendAppEvent(SDL_EVENT_WILL_ENTER_FOREGROUND);
+        }
+    };
+    if (RegisterAppStateChangeNotification(rascn, NULL, &hPLM)) {
+        return SDL_SetError("[GDK] Unable to call RegisterAppStateChangeNotification");
+    }
+
+    // Register constrain/unconstrain handling
+    auto raccn = [](BOOLEAN constrained, PVOID context) {
+        SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "[GDK] in RegisterAppConstrainedChangeNotification handler");
+        SDL_VideoDevice *_this = SDL_GetVideoDevice();
+        if (_this) {
+            if (constrained) {
+                SDL_SetKeyboardFocus(NULL);
+            } else {
+                SDL_SetKeyboardFocus(_this->windows);
+            }
+        }
+    };
+    if (RegisterAppConstrainedChangeNotification(raccn, NULL, &hCPLM)) {
+        return SDL_SetError("[GDK] Unable to call RegisterAppConstrainedChangeNotification");
+    }
+
+    return true;
+}
+
+extern "C"
+void GDK_UnregisterChangeNotifications(void)
+{
+    // Unregister suspend/resume handling
+    UnregisterAppStateChangeNotification(hPLM);
+    CloseHandle(plmSuspendComplete);
+
+    // Unregister constrain/unconstrain handling
+    UnregisterAppConstrainedChangeNotification(hCPLM);
+}
+
+extern "C"
+void SDL_GDKSuspendComplete()
+{
+    if (plmSuspendComplete) {
+        SetEvent(plmSuspendComplete);
+    }
+}
+
+extern "C"
+bool SDL_GetGDKDefaultUser(XUserHandle *outUserHandle)
+{
+    XAsyncBlock block = { 0 };
+    HRESULT result;
+
+    if (FAILED(result = XUserAddAsync(XUserAddOptions::AddDefaultUserAllowingUI, &block))) {
+        return WIN_SetErrorFromHRESULT("XUserAddAsync", result);
+    }
+
+    do {
+        result = XUserAddResult(&block, outUserHandle);
+    } while (result == E_PENDING);
+    if (FAILED(result)) {
+        return WIN_SetErrorFromHRESULT("XUserAddResult", result);
+    }
+
+    return true;
+}
diff --git a/contrib/SDL-3.2.8/src/core/gdk/SDL_gdk.h b/contrib/SDL-3.2.8/src/core/gdk/SDL_gdk.h
new file mode 100644
index 0000000..14f4e6f
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/core/gdk/SDL_gdk.h
@@ -0,0 +1,27 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  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 called from WIN_PumpEvents on GDK
+extern void GDK_DispatchTaskQueue(void);
+
+extern bool GDK_RegisterChangeNotifications(void);
+extern void GDK_UnregisterChangeNotifications(void);