feat: godot-engine-source-4.3-stable

engine/thirdparty/openxr/src/loader/loader_init_data.hpp

@@ -0,0 +1,92 @@
+// Copyright (c) 2017-2024, The Khronos Group Inc.
+// Copyright (c) 2017-2019 Valve Corporation
+// Copyright (c) 2017-2019 LunarG, Inc.
+//
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Initial Author: Mark Young <marky@lunarg.com>
+//
+
+#pragma once
+
+#include <xr_dependencies.h>
+#include <openxr/openxr_platform.h>
+
+#ifdef XR_USE_PLATFORM_ANDROID
+#include <json/value.h>
+#include <android/asset_manager_jni.h>
+#include "android_utilities.h"
+#endif  // XR_USE_PLATFORM_ANDROID
+
+#ifdef XR_KHR_LOADER_INIT_SUPPORT
+
+/*!
+ * Stores a copy of the data passed to the xrInitializeLoaderKHR function in a singleton.
+ */
+class LoaderInitData {
+   public:
+    /*!
+     * Singleton accessor.
+     */
+    static LoaderInitData& instance() {
+        static LoaderInitData obj;
+        return obj;
+    }
+
+#if defined(XR_USE_PLATFORM_ANDROID)
+    /*!
+     * Type alias for the platform-specific structure type.
+     */
+    using StructType = XrLoaderInitInfoAndroidKHR;
+    /*!
+     * Native library path.
+     */
+    std::string _native_library_path;
+    /*!
+     * Android asset manager.
+     */
+    AAssetManager* _android_asset_manager;
+#else
+#error "Platform specific XR_KHR_loader_init structure is not defined for this platform."
+#endif
+
+    /*!
+     * Get our copy of the data, casted to pass to the runtime's matching method.
+     */
+    const XrLoaderInitInfoBaseHeaderKHR* getParam() const { return reinterpret_cast<const XrLoaderInitInfoBaseHeaderKHR*>(&_data); }
+
+    /*!
+     * Get the data via its real structure type.
+     */
+    const StructType& getData() const { return _data; }
+
+    /*!
+     * Has this been correctly initialized?
+     */
+    bool initialized() const noexcept { return _initialized; }
+
+    /*!
+     * Initialize loader data - called by InitializeLoaderInitData() and thus ultimately by the loader's xrInitializeLoaderKHR
+     * implementation. Each platform that needs this extension will provide an implementation of this.
+     */
+    XrResult initialize(const XrLoaderInitInfoBaseHeaderKHR* info);
+
+   private:
+    //! Private constructor, forces use of singleton accessor.
+    LoaderInitData() = default;
+    //! Platform-specific init data
+    StructType _data = {};
+    //! Flag for indicating whether _data is valid.
+    bool _initialized = false;
+};
+
+//! Initialize loader init data, where required.
+XrResult InitializeLoaderInitData(const XrLoaderInitInfoBaseHeaderKHR* loaderInitInfo);
+
+#ifdef XR_USE_PLATFORM_ANDROID
+XrResult GetPlatformRuntimeVirtualManifest(Json::Value& out_manifest);
+std::string GetAndroidNativeLibraryDir();
+void* Android_Get_Asset_Manager();
+#endif  // XR_USE_PLATFORM_ANDROID
+
+#endif  // XR_KHR_LOADER_INIT_SUPPORT