1 files changed, 103 insertions, 0 deletions
diff --git a/thirdparty/openxr/src/loader/manifest_file.hpp b/thirdparty/openxr/src/loader/manifest_file.hpp
new file mode 100644
index 0000000000..0d04886d84
--- /dev/null
+++ b/thirdparty/openxr/src/loader/manifest_file.hpp
@@ -0,0 +1,103 @@
+// Copyright (c) 2017 The Khronos Group Inc.
+// Copyright (c) 2017 Valve Corporation
+// Copyright (c) 2017 LunarG, Inc.
+//
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Initial Author: Mark Young <marky@lunarg.com>
+//
+
+#pragma once
+
+#include <openxr/openxr.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+#include <unordered_map>
+
+namespace Json {
+class Value;
+}
+
+enum ManifestFileType {
+    MANIFEST_TYPE_UNDEFINED = 0,
+    MANIFEST_TYPE_RUNTIME,
+    MANIFEST_TYPE_IMPLICIT_API_LAYER,
+    MANIFEST_TYPE_EXPLICIT_API_LAYER,
+};
+
+struct JsonVersion {
+    uint32_t major;
+    uint32_t minor;
+    uint32_t patch;
+};
+
+struct ExtensionListing {
+    std::string name;
+    uint32_t extension_version;
+};
+
+// ManifestFile class -
+// Base class responsible for finding and parsing manifest files.
+class ManifestFile {
+   public:
+    // Non-copyable
+    ManifestFile(const ManifestFile &) = delete;
+    ManifestFile &operator=(const ManifestFile &) = delete;
+
+    ManifestFileType Type() const { return _type; }
+    const std::string &Filename() const { return _filename; }
+    const std::string &LibraryPath() const { return _library_path; }
+    void GetInstanceExtensionProperties(std::vector<XrExtensionProperties> &props);
+    const std::string &GetFunctionName(const std::string &func_name) const;
+
+   protected:
+    ManifestFile(ManifestFileType type, const std::string &filename, const std::string &library_path);
+    void ParseCommon(Json::Value const &root_node);
+    static bool IsValidJson(const Json::Value &root, JsonVersion &version);
+
+   private:
+    std::string _filename;
+    ManifestFileType _type;
+    std::string _library_path;
+    std::vector<ExtensionListing> _instance_extensions;
+    std::unordered_map<std::string, std::string> _functions_renamed;
+};
+
+// RuntimeManifestFile class -
+// Responsible for finding and parsing Runtime-specific manifest files.
+class RuntimeManifestFile : public ManifestFile {
+   public:
+    // Factory method
+    static XrResult FindManifestFiles(std::vector<std::unique_ptr<RuntimeManifestFile>> &manifest_files);
+
+   private:
+    RuntimeManifestFile(const std::string &filename, const std::string &library_path);
+    static void CreateIfValid(const std::string &filename, std::vector<std::unique_ptr<RuntimeManifestFile>> &manifest_files);
+    static void CreateIfValid(const Json::Value &root_node, const std::string &filename,
+                              std::vector<std::unique_ptr<RuntimeManifestFile>> &manifest_files);
+};
+
+// ApiLayerManifestFile class -
+// Responsible for finding and parsing API Layer-specific manifest files.
+class ApiLayerManifestFile : public ManifestFile {
+   public:
+    // Factory method
+    static XrResult FindManifestFiles(ManifestFileType type, std::vector<std::unique_ptr<ApiLayerManifestFile>> &manifest_files);
+
+    const std::string &LayerName() const { return _layer_name; }
+    void PopulateApiLayerProperties(XrApiLayerProperties &props) const;
+
+   private:
+    ApiLayerManifestFile(ManifestFileType type, const std::string &filename, const std::string &layer_name,
+                         const std::string &description, const JsonVersion &api_version, const uint32_t &implementation_version,
+                         const std::string &library_path);
+    static void CreateIfValid(ManifestFileType type, const std::string &filename,
+                              std::vector<std::unique_ptr<ApiLayerManifestFile>> &manifest_files);
+
+    JsonVersion _api_version;
+    std::string _layer_name;
+    std::string _description;
+    uint32_t _implementation_version;
+};