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// Copyright (c) 2017-2022, 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 "loader_platform.hpp"
#include <openxr/openxr.h>
#include <string>
#include <vector>
#include <unordered_map>
#include <mutex>
#include <memory>
#ifdef XR_USE_PLATFORM_ANDROID
#define XR_KHR_LOADER_INIT_SUPPORT
#endif
namespace Json {
class Value;
}
#ifdef XR_KHR_LOADER_INIT_SUPPORT
//! Initialize loader, where required.
XrResult InitializeLoader(const XrLoaderInitInfoBaseHeaderKHR* loaderInitInfo);
XrResult GetPlatformRuntimeVirtualManifest(Json::Value& out_manifest);
#endif
class RuntimeManifestFile;
struct XrGeneratedDispatchTable;
class RuntimeInterface {
public:
virtual ~RuntimeInterface();
// Helper functions for loading and unloading the runtime (but only when necessary)
static XrResult LoadRuntime(const std::string& openxr_command);
static void UnloadRuntime(const std::string& openxr_command);
static RuntimeInterface& GetRuntime() { return *(GetInstance().get()); }
static XrResult GetInstanceProcAddr(XrInstance instance, const char* name, PFN_xrVoidFunction* function);
// Get the direct dispatch table to this runtime, without API layers or loader terminators.
static const XrGeneratedDispatchTable* GetDispatchTable(XrInstance instance);
static const XrGeneratedDispatchTable* GetDebugUtilsMessengerDispatchTable(XrDebugUtilsMessengerEXT messenger);
void GetInstanceExtensionProperties(std::vector<XrExtensionProperties>& extension_properties);
bool SupportsExtension(const std::string& extension_name);
XrResult CreateInstance(const XrInstanceCreateInfo* info, XrInstance* instance);
XrResult DestroyInstance(XrInstance instance);
bool TrackDebugMessenger(XrInstance instance, XrDebugUtilsMessengerEXT messenger);
void ForgetDebugMessenger(XrDebugUtilsMessengerEXT messenger);
// No default construction
RuntimeInterface() = delete;
// Non-copyable
RuntimeInterface(const RuntimeInterface&) = delete;
RuntimeInterface& operator=(const RuntimeInterface&) = delete;
private:
RuntimeInterface(LoaderPlatformLibraryHandle runtime_library, PFN_xrGetInstanceProcAddr get_instance_proc_addr);
void SetSupportedExtensions(std::vector<std::string>& supported_extensions);
static XrResult TryLoadingSingleRuntime(const std::string& openxr_command, std::unique_ptr<RuntimeManifestFile>& manifest_file);
static std::unique_ptr<RuntimeInterface>& GetInstance() {
static std::unique_ptr<RuntimeInterface> instance;
return instance;
}
LoaderPlatformLibraryHandle _runtime_library;
PFN_xrGetInstanceProcAddr _get_instance_proc_addr;
std::unordered_map<XrInstance, std::unique_ptr<XrGeneratedDispatchTable>> _dispatch_table_map;
std::mutex _dispatch_table_mutex;
std::unordered_map<XrDebugUtilsMessengerEXT, XrInstance> _messenger_to_instance_map;
std::mutex _messenger_to_instance_mutex;
std::vector<std::string> _supported_extensions;
};
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