text: // Copyright (c) 2017-2020 The Khronos Group Inc.
  // Copyright (c) 2017-2019 Valve Corporation
  // Copyright (c) 2017-2019 LunarG, Inc.
  //
  // SPDX-License-Identifier: Apache-2.0
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  //
  // Author: Mark Young <marky@lunarg.com>
  // Author: Dave Houlton <daveh@lunarg.com>
  //
  
  #include "hex_and_handles.h"
  #include "loader_interfaces.h"
  #include "platform_utils.hpp"
  #include "xr_generated_api_dump.hpp"
  #include "xr_generated_dispatch_table.h"
  
  #include <openxr/openxr.h>
  
  #include <algorithm>
  #include <cctype>
  #include <cstring>
  #include <fstream>
  #include <iostream>
  #include <mutex>
  #include <sstream>
  #include <stdexcept>
  #include <string>
  #include <tuple>
  #include <unordered_map>
  #include <utility>
  #include <vector>
  
  #if defined(__GNUC__) && __GNUC__ >= 4
  #define LAYER_EXPORT __attribute__((visibility("default")))
  #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
  #define LAYER_EXPORT __attribute__((visibility("default")))
  #elif defined(_WIN32)
  #define LAYER_EXPORT __declspec(dllexport)
  #else
  #define LAYER_EXPORT
  #endif
  
  enum ApiDumpRecordType {
      RECORD_NONE = 0,
      RECORD_TEXT_COUT,
      RECORD_TEXT_FILE,
      RECORD_HTML_FILE,
      RECORD_CODE_FILE,
  };
  
  struct ApiDumpRecordInfo {
      bool initialized;
      ApiDumpRecordType type;
      std::string file_name;
  };
  
  static ApiDumpRecordInfo g_record_info = {};
  static std::mutex g_record_mutex = {};
  
  // HTML utilities
  bool ApiDumpLayerWriteHtmlHeader() {
      try {
          std::unique_lock<std::mutex> mlock(g_record_mutex);
          std::ofstream html_file;
          html_file.open(g_record_info.file_name, std::ios::out);
          html_file << "<!doctype html>\n"
                       "<html>\n"
                       "    <head>\n"
                       "        <title>OpenXR API Dump</title>\n"
                       "        <style type='text/css'>\n"
                       "        html {\n"
                       "            background-color: #0b1e48;\n"
                       "            background-image: url('https://vulkan.lunarg.com/img/bg-starfield.jpg');\n"
                       "            background-position: center;\n"
                       "            -webkit-background-size: cover;\n"
                       "            -moz-background-size: cover;\n"
                       "            -o-background-size: cover;\n"
                       "            background-size: cover;\n"
                       "            background-attachment: fixed;\n"
                       "            background-repeat: no-repeat;\n"
                       "            height: 100%;\n"
                       "        }\n"
                       "        #header {\n"
                       "            z-index: -1;\n"
                       "        }\n"
                       "        #header>img {\n"
                       "            position: absolute;\n"
                       "            width: 160px;\n"
                       "            margin-left: -280px;\n"
                       "            top: -10px;\n"
                       "            left: 50%;\n"
                       "        }\n"
                       "        #header>h1 {\n"
                       "            font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;\n"
                       "            font-size: 44px;\n"
                       "            font-weight: 200;\n"
                       "            text-shadow: 4px 4px 5px #000;\n"
                       "            color: #eee;\n"
                       "            position: absolute;\n"
                       "            width: 400px;\n"
                       "            margin-left: -80px;\n"
                       "            top: 8px;\n"
                       "            left: 50%;\n"
                       "        }\n"
                       "        body {\n"
                       "            font-family: Consolas, monaco, monospace;\n"
                       "            font-size: 14px;\n"
                       "            line-height: 20px;\n"
                       "            color: #eee;\n"
                       "            height: 100%;\n"
                       "            margin: 0;\n"
                       "            overflow: hidden;\n"
                       "        }\n"
                       "        #wrapper {\n"
                       "            background-color: rgba(0, 0, 0, 0.7);\n"
                       "            border: 1px solid #446;\n"
                       "            box-shadow: 0px 0px 10px #000;\n"
                       "            padding: 8px 12px;\n"
                       "            display: inline-block;\n"
                       "            position: absolute;\n"
                       "            top: 80px;\n"
                       "            bottom: 25px;\n"
                       "            left: 50px;\n"
                       "            right: 50px;\n"
                       "            overflow: auto;\n"
                       "        }\n"
                       "        details>*:not(summary) {\n"
                       "            margin-left: 22px;\n"
                       "        }\n"
                       "        summary:only-child {\n"
                       "            display: block;\n"
                       "            padding-left: 15px;\n"
                       "        }\n"
                       "        details>summary:only-child::-webkit-details-marker {\n"
                       "            display: none;\n"
                       "            padding-left: 15px;\n"
                       "        }\n"
                       "        .headervar, .headertype, .headerval {\n"
                       "            display: inline;\n"
                       "            margin: 0 9px;\n"
                       "        }\n"
                       "        .var, .type, .val {\n"
                       "            display: inline;\n"
                       "            margin: 0 6px;\n"
                       "        }\n"
                       "        .headertype, .type {\n"
                       "            color: #acf;\n"
                       "        }\n"
                       "        .headerval, .val {\n"
                       "            color: #afa;\n"
                       "            text-align: right;\n"
                       "        }\n"
                       "        .thd {\n"
                       "            color: #888;\n"
                       "        }\n"
                       "        </style>\n"
                       "    </head>\n"
                       "    <body>\n"
                       "        <div id='header'>\n"
                       "            <img src='https://lunarg.com/wp-content/uploads/2016/02/LunarG-wReg-150.png' />\n"
                       "            <h1>OpenXR API Dump</h1>\n"
                       "        </div>\n"
                       "        <div id='wrapper'>\n";
          return true;
      } catch (...) {
          return false;
      }
  }
  
  bool ApiDumpLayerWriteHtmlFooter() {
      try {
          std::unique_lock<std::mutex> mlock(g_record_mutex);
          std::ofstream html_file;
          html_file.open(g_record_info.file_name, std::ios::out | std::ios::app);
          html_file << "        </div>\n"
                       "    </body>\n"
                       "</html>";
  
          // Writing the footer means we're done.
          if (g_record_info.initialized) {
              g_record_info.initialized = false;
              g_record_info.type = RECORD_NONE;
          }
  
          return true;
      } catch (...) {
          return false;
      }
  }
  
  // Api Dump Utility function to return an instance based on the generated dispatch table
  // pointer.
  XrInstance FindInstanceFromDispatchTable(XrGeneratedDispatchTable *dispatch_table) {
      std::unique_lock<std::mutex> mlock(g_instance_dispatch_mutex);
      XrInstance instance = XR_NULL_HANDLE;
      for (auto it = g_instance_dispatch_map.begin(); it != g_instance_dispatch_map.end();) {
          if (it->second == dispatch_table) {
              instance = it->first;
              break;
          }
      }
      return instance;
  }
  
  // Function to record all the API dump information
  bool ApiDumpLayerRecordContent(std::vector<std::tuple<std::string, std::string, std::string>> contents) {
      bool success = false;
      if (g_record_info.initialized) {
          std::unique_lock<std::mutex> mlock(g_record_mutex);
          uint32_t count = 0;
          switch (g_record_info.type) {
              case RECORD_TEXT_COUT: {
                  for (const auto &content : contents) {
                      std::string content_type;
                      std::string content_name;
                      std::string content_value;
                      std::tie(content_type, content_name, content_value) = content;
                      if (count++ != 0) {
                          std::cout << "    ";
                      }
                      if (!content_value.empty()) {
                          std::cout << content_type << " " << content_name << " = " << content_value << "\n";
                      } else {
                          std::cout << content_type << " " << content_name << "\n";
                      }
                  }
                  success = true;
                  break;
              }
              case RECORD_TEXT_FILE: {
                  std::ofstream text_file;
                  text_file.open(g_record_info.file_name, std::ios::out | std::ios::app);
                  for (const auto &content : contents) {
                      std::string content_type;
                      std::string content_name;
                      std::string content_value;
                      std::tie(content_type, content_name, content_value) = content;
                      if (count++ != 0) {
                          text_file << "    ";
                      }
                      if (!content_value.empty()) {
                          text_file << content_type << " " << content_name << " = " << content_value << "\n";
                      } else {
                          text_file << content_type << " " << content_name << "\n";
                      }
                  }
                  text_file.close();
                  success = true;
                  break;
              }
              case RECORD_HTML_FILE: {
                  std::ofstream text_file;
                  text_file.open(g_record_info.file_name, std::ios::out | std::ios::app);
                  text_file << "<details class='data'>\n";
                  std::vector<std::string> prefixes;
                  uint32_t last_deref_count = 0;
                  for (uint32_t content_index = 0; content_index < contents.size(); ++content_index) {
                      std::string content_type;
                      std::string content_name;
                      std::string content_value;
                      std::tie(content_type, content_name, content_value) = contents[content_index];
                      if (content_index == 0) {
                          text_file << "   <summary>\n"
                                    << "      <div class='headertype'>" << content_type << "</div>\n"
                                    << "      <div class='headervar'>" << content_name << "</div>\n"
                                    << "   </summary>\n";
                      } else {
                          uint32_t cur_deref_count = 0;
                          uint32_t next_deref_count = 0;
  
                          // Count number of structure and pointer dereferences for the current line
                          cur_deref_count = static_cast<uint32_t>(std::count(content_name.begin(), content_name.end(), '.'));
                          std::string::size_type start = 0;
                          while ((start = content_name.find("->", start)) != std::string::npos) {
                              ++cur_deref_count;
                              start += 2;
                          }
                          // Now look for array dereferences
                          start = 0;
                          while ((start = content_name.find('[', start)) != std::string::npos) {
                              ++cur_deref_count;
                              start++;
                          }
  
                          // If there's something after this, see if it's a sub-component of this.
                          if (content_index < contents.size() - 1) {
                              std::string next_content_type;
                              std::string next_content_name;
                              std::string next_content_value;
                              std::tie(next_content_type, next_content_name, next_content_value) = contents[content_index + 1];
  
                              // Count number of structure and pointer dereferences for the next line
                              next_deref_count =
                                  static_cast<uint32_t>(std::count(next_content_name.begin(), next_content_name.end(), '.'));
                              start = 0;
                              while ((start = next_content_name.find("->", start)) != std::string::npos) {
                                  ++next_deref_count;
                                  start += 2;
                              }
                              // Now look for array dereferences
                              start = 0;
                              while ((start = next_content_name.find('[', start)) != std::string::npos) {
                                  ++next_deref_count;
                                  start++;
                              }
                          }
  
                          // If we've reduced the number of dereferences in the name from last time, we need
                          // to close up those detail sections.
                          if (cur_deref_count < last_deref_count) {
                              uint32_t diff_count = last_deref_count - cur_deref_count;
                              while ((diff_count--) != 0u) {
                                  text_file << "   </details>\n";
                                  prefixes.pop_back();
                              }
                          }
  
                          // Look through any prefixes we've saved (going backwards through the list)
                          // and find the one that matches our beginning.
                          std::string short_name = content_name;
                          if (cur_deref_count > 0) {
                              for (auto it = prefixes.rbegin(); it != prefixes.rend(); ++it) {
                                  if (content_name.find(*it) == 0) {
                                      std::string::size_type additional_offset = it->size() + 1;
                                      if (content_name[additional_offset - 1] == '-') {
                                          additional_offset++;
                                      } else if (content_name[additional_offset - 1] == '[') {
                                          additional_offset--;
                                      }
                                      short_name = content_name.substr(additional_offset);
                                      break;
                                  }
                              }
                          }
  
                          bool writing_summary = false;
  
                          // If the next item contains this item as a prefix, start the summary.  Otherwise,
                          // start a <div> marker so that each component lands on its own line.
                          if (cur_deref_count < next_deref_count) {
                              text_file << "   <details class='data'>\n"
                                        << "      <summary>\n";
                              writing_summary = true;
                              prefixes.push_back(content_name);
                          } else {
                              text_file << "      <div class='data'>\n";
                          }
  
                          // Write out the content
                          text_file << "         <div class='type'>" << content_type << "</div>\n"
                                    << "         <div class='var'>" << short_name << "</div>\n";
                          bool value_needs_printing = true;
                          if (content_type.find("char") != std::string::npos) {
                              uint64_t star_count = std::count(content_type.begin(), content_type.end(), '*');
                              uint64_t bracket_count = std::count(content_type.begin(), content_type.end(), '[');
                              if (star_count + bracket_count < 2) {
                                  text_file << "         <div class='val'>\"" << content_value << "\"</div>";
                                  value_needs_printing = false;
                              }
                          }
                          if (!content_value.empty() && value_needs_printing) {
                              text_file << "         <div class='val'>" << content_value << "</div>";
                          }
                          text_file << "\n";
  
                          // Wrap up any summary we may have started.  Otherwise, just wrap up the
                          // <div> marker wrapping this entry.
                          if (writing_summary) {
                              text_file << "      </summary>\n";
                          } else {
                              text_file << "      </div>\n";
                          }
  
                          last_deref_count = cur_deref_count;
                      }
                  }
  
                  // Wrap up any remaining items
                  if (last_deref_count != 0u) {
                      while ((last_deref_count--) != 0u) {
                          text_file << "   </details>\n";
                          prefixes.pop_back();
                      }
                  }
                  text_file << "</details>\n";
                  break;
              }
              default:
                  break;
          }
      }
      return success;
  }
  
  XRAPI_ATTR XrResult XRAPI_CALL ApiDumpLayerXrCreateInstance(const XrInstanceCreateInfo * /*info*/, XrInstance * /*instance*/) {
      if (!g_record_info.initialized) {
          g_record_info.initialized = true;
          g_record_info.type = RECORD_TEXT_COUT;
      }
      return XR_SUCCESS;
  }
  
  XRAPI_ATTR XrResult XRAPI_CALL ApiDumpLayerXrCreateApiLayerInstance(const XrInstanceCreateInfo *info,
                                                                      const struct XrApiLayerCreateInfo *apiLayerInfo,
                                                                      XrInstance *instance) {
      try {
          PFN_xrGetInstanceProcAddr next_get_instance_proc_addr = nullptr;
          PFN_xrCreateApiLayerInstance next_create_api_layer_instance = nullptr;
          XrApiLayerCreateInfo new_api_layer_info = {};
          bool first_time = !g_record_info.initialized;
  
          if (!g_record_info.initialized) {
              g_record_info.initialized = true;
              g_record_info.type = RECORD_TEXT_COUT;
          }
  
          std::string export_type = PlatformUtilsGetEnv("XR_API_DUMP_EXPORT_TYPE");
          std::string file_name = PlatformUtilsGetEnv("XR_API_DUMP_FILE_NAME");
          if (!file_name.empty()) {
              g_record_info.file_name = file_name;
              g_record_info.type = RECORD_TEXT_FILE;
          }
  
          if (!export_type.empty()) {
              std::string export_type_lower = export_type;
              std::transform(export_type.begin(), export_type.end(), export_type_lower.begin(),
                             [](unsigned char c) { return std::tolower(c); });
  
              if (export_type_lower == "text") {
                  if (!g_record_info.file_name.empty()) {
                      g_record_info.type = RECORD_TEXT_FILE;
                  } else {
                      g_record_info.type = RECORD_TEXT_COUT;
                  }
              } else if (export_type_lower == "html" && first_time) {
                  g_record_info.type = RECORD_HTML_FILE;
                  if (!ApiDumpLayerWriteHtmlHeader()) {
                      return XR_ERROR_INITIALIZATION_FAILED;
                  }
              } else if (export_type_lower == "code") {
                  g_record_info.type = RECORD_CODE_FILE;
              }
          }
  
          // Validate the API layer info and next API layer info structures before we try to use them
          if (nullptr == apiLayerInfo || XR_LOADER_INTERFACE_STRUCT_API_LAYER_CREATE_INFO != apiLayerInfo->structType ||
              XR_API_LAYER_CREATE_INFO_STRUCT_VERSION > apiLayerInfo->structVersion ||
              sizeof(XrApiLayerCreateInfo) > apiLayerInfo->structSize || nullptr == apiLayerInfo->nextInfo ||
              XR_LOADER_INTERFACE_STRUCT_API_LAYER_NEXT_INFO != apiLayerInfo->nextInfo->structType ||
              XR_API_LAYER_NEXT_INFO_STRUCT_VERSION > apiLayerInfo->nextInfo->structVersion ||
              sizeof(XrApiLayerNextInfo) > apiLayerInfo->nextInfo->structSize ||
              0 != strcmp("XR_APILAYER_LUNARG_api_dump", apiLayerInfo->nextInfo->layerName) ||
              nullptr == apiLayerInfo->nextInfo->nextGetInstanceProcAddr ||
              nullptr == apiLayerInfo->nextInfo->nextCreateApiLayerInstance) {
              return XR_ERROR_INITIALIZATION_FAILED;
          }
  
          // Generate output for this command as if it were the standard xrCreateInstance
          std::vector<std::tuple<std::string, std::string, std::string>> contents;
          contents.emplace_back("XrResult", "xrCreateInstance", "");
          contents.emplace_back("const XrInstanceCreateInfo*", "info", PointerToHexString(info));
          if (nullptr != info) {
              std::string info_prefix = "info->";
              contents.emplace_back("XrStructureType", "info->type", std::to_string(info->type));
              std::string next_prefix = info_prefix;
              next_prefix += "next";
              // Decode the next chain if it exists
              if (!ApiDumpDecodeNextChain(nullptr, info->next, next_prefix, contents)) {
                  throw std::invalid_argument("Invalid Operation");
              }
              std::string flags_prefix = info_prefix;
              flags_prefix += "createFlags";
              contents.emplace_back("XrInstanceCreateFlags", flags_prefix, std::to_string(info->createFlags));
              std::string applicationinfo_prefix = info_prefix;
              applicationinfo_prefix += "applicationInfo";
              if (!ApiDumpOutputXrStruct(nullptr, &info->applicationInfo, applicationinfo_prefix, "XrApplicationInfo", true,
                                         contents)) {
                  throw std::invalid_argument("Invalid Operation");
              }
              std::string enabledapilayercount_prefix = info_prefix;
              enabledapilayercount_prefix += "enabledApiLayerCount";
              std::ostringstream oss_enabledApiLayerCount;
              oss_enabledApiLayerCount << "0x" << std::hex << (info->enabledApiLayerCount);
              contents.emplace_back("uint32_t", enabledapilayercount_prefix, oss_enabledApiLayerCount.str());
              std::string enabledapilayernames_prefix = info_prefix;
              enabledapilayernames_prefix += "enabledApiLayerNames";
              std::ostringstream oss_enabledApiLayerNames_array;
              oss_enabledApiLayerNames_array << "0x" << std::hex << (info->enabledApiLayerNames);
              contents.emplace_back("const char* const*", enabledapilayernames_prefix, oss_enabledApiLayerNames_array.str());
              for (uint32_t i = 0; i < info->enabledApiLayerCount; ++i) {
                  std::string prefix = enabledapilayernames_prefix + "[" + std::to_string(i) + "]";
                  contents.emplace_back("const char* const*", prefix, info->enabledApiLayerNames[i]);
              }
              std::string enabledextensioncount_prefix = info_prefix;
              enabledextensioncount_prefix += "enabledExtensionCount";
              std::ostringstream oss_enabledExtensionCount;
              oss_enabledExtensionCount << "0x" << std::hex << (info->enabledExtensionCount);
              contents.emplace_back("uint32_t", enabledextensioncount_prefix, oss_enabledExtensionCount.str());
              std::string enabledextensionnames_prefix = info_prefix;
              enabledextensionnames_prefix += "enabledExtensionNames";
              std::ostringstream oss_enabledExtensionNames_array;
              oss_enabledExtensionNames_array << "0x" << std::hex << (info->enabledExtensionNames);
              contents.emplace_back("const char* const*", enabledextensionnames_prefix, oss_enabledExtensionNames_array.str());
              for (uint32_t ii = 0; ii < info->enabledExtensionCount; ++ii) {
                  std::string prefix = enabledextensionnames_prefix + "[" + std::to_string(ii) + "]";
                  contents.emplace_back("const char* const*", prefix, info->enabledExtensionNames[ii]);
              }
          }
  
          contents.emplace_back("XrInstance*", "instance", PointerToHexString(instance));
          ApiDumpLayerRecordContent(contents);
  
          // Copy the contents of the layer info struct, but then move the next info up by
          // one slot so that the next layer gets information.
          memcpy(&new_api_layer_info, apiLayerInfo, sizeof(XrApiLayerCreateInfo));
          new_api_layer_info.nextInfo = apiLayerInfo->nextInfo->next;
  
          // Get the function pointers we need
          next_get_instance_proc_addr = apiLayerInfo->nextInfo->nextGetInstanceProcAddr;
          next_create_api_layer_instance = apiLayerInfo->nextInfo->nextCreateApiLayerInstance;
  
          // Create the instance
          XrInstance returned_instance = *instance;
          XrResult result = next_create_api_layer_instance(info, &new_api_layer_info, &returned_instance);
          *instance = returned_instance;
  
          // Create the dispatch table to the next levels
          auto *next_dispatch = new XrGeneratedDispatchTable();
          GeneratedXrPopulateDispatchTable(next_dispatch, returned_instance, next_get_instance_proc_addr);
  
          std::unique_lock<std::mutex> mlock(g_instance_dispatch_mutex);
          g_instance_dispatch_map[returned_instance] = next_dispatch;
  
          return result;
      } catch (...) {
          return XR_ERROR_INITIALIZATION_FAILED;
      }
  }
  
  XRAPI_ATTR XrResult XRAPI_CALL ApiDumpLayerXrDestroyInstance(XrInstance instance) {
      // Generate output for this command
      std::vector<std::tuple<std::string, std::string, std::string>> contents;
      contents.emplace_back("XrResult", "xrDestroyInstance", "");
      contents.emplace_back("XrInstance", "instance", HandleToHexString(instance));
      ApiDumpLayerRecordContent(contents);
  
      std::unique_lock<std::mutex> mlock(g_instance_dispatch_mutex);
      XrGeneratedDispatchTable *next_dispatch = nullptr;
      auto map_iter = g_instance_dispatch_map.find(instance);
      if (map_iter != g_instance_dispatch_map.end()) {
          next_dispatch = map_iter->second;
      }
      mlock.unlock();
  
      if (nullptr == next_dispatch) {
          return XR_ERROR_HANDLE_INVALID;
      }
  
      next_dispatch->DestroyInstance(instance);
      ApiDumpCleanUpMapsForTable(next_dispatch);
  
      // Write out the HTML footer if we destroy the last instance
      if (g_instance_dispatch_map.empty() && g_record_info.type == RECORD_HTML_FILE) {
          ApiDumpLayerWriteHtmlFooter();
      }
      return XR_SUCCESS;
  }
  
  extern "C" {
  
  // Function used to negotiate an interface betewen the loader and an API layer.  Each library exposing one or
  // more API layers needs to expose at least this function.
  XrResult LAYER_EXPORT XRAPI_CALL xrNegotiateLoaderApiLayerInterface(const XrNegotiateLoaderInfo *loaderInfo,
                                                                      const char * /*apiLayerName*/,
                                                                      XrNegotiateApiLayerRequest *apiLayerRequest) {
      if (nullptr == loaderInfo || nullptr == apiLayerRequest || loaderInfo->structType != XR_LOADER_INTERFACE_STRUCT_LOADER_INFO ||
          loaderInfo->structVersion != XR_LOADER_INFO_STRUCT_VERSION || loaderInfo->structSize != sizeof(XrNegotiateLoaderInfo) ||
          apiLayerRequest->structType != XR_LOADER_INTERFACE_STRUCT_API_LAYER_REQUEST ||
          apiLayerRequest->structVersion != XR_API_LAYER_INFO_STRUCT_VERSION ||
          apiLayerRequest->structSize != sizeof(XrNegotiateApiLayerRequest) ||
          loaderInfo->minInterfaceVersion > XR_CURRENT_LOADER_API_LAYER_VERSION ||
          loaderInfo->maxInterfaceVersion < XR_CURRENT_LOADER_API_LAYER_VERSION ||
          loaderInfo->maxInterfaceVersion > XR_CURRENT_LOADER_API_LAYER_VERSION ||
          loaderInfo->maxApiVersion < XR_CURRENT_API_VERSION || loaderInfo->minApiVersion > XR_CURRENT_API_VERSION) {
          return XR_ERROR_INITIALIZATION_FAILED;
      }
  
      apiLayerRequest->layerInterfaceVersion = XR_CURRENT_LOADER_API_LAYER_VERSION;
      apiLayerRequest->layerApiVersion = XR_CURRENT_API_VERSION;
      apiLayerRequest->getInstanceProcAddr = reinterpret_cast<PFN_xrGetInstanceProcAddr>(ApiDumpLayerXrGetInstanceProcAddr);
      apiLayerRequest->createApiLayerInstance = reinterpret_cast<PFN_xrCreateApiLayerInstance>(ApiDumpLayerXrCreateApiLayerInstance);
  
      return XR_SUCCESS;
  }
  
  }  // extern "C"
  