text: //----------------------------------------------------------------------------------
  // File:        NvVkUtil\nosdk\vulkan/vk_platform.h
  // SDK Version: v3.00 
  // Email:       gameworks@nvidia.com
  // Site:        http://developer.nvidia.com/
  //----------------------------------------------------------------------------------
  //
  // File: vk_platform.h
  //
  /*
  ** Copyright (c) 2014-2015 The Khronos Group Inc.
  **
  ** 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.
  */
  
  
  #ifndef VK_PLATFORM_H_
  #define VK_PLATFORM_H_
  
  #ifdef __cplusplus
  extern "C"
  {
  #endif // __cplusplus
  
  /*
  ***************************************************************************************************
  *   Platform-specific directives and type declarations
  ***************************************************************************************************
  */
  
  /* Platform-specific calling convention macros.
   *
   * Platforms should define these so that Vulkan clients call Vulkan commands
   * with the same calling conventions that the Vulkan implementation expects.
   *
   * VKAPI_ATTR - Placed before the return type in function declarations.
   *              Useful for C++11 and GCC/Clang-style function attribute syntax.
   * VKAPI_CALL - Placed after the return type in function declarations.
   *              Useful for MSVC-style calling convention syntax.
   * VKAPI_PTR  - Placed between the '(' and '*' in function pointer types.
   *
   * Function declaration:  VKAPI_ATTR void VKAPI_CALL vkCommand(void);
   * Function pointer type: typedef void (VKAPI_PTR *PFN_vkCommand)(void);
   */
  #if defined(_WIN32)
      // On Windows, Vulkan commands use the stdcall convention
      #define VKAPI_ATTR
      #define VKAPI_CALL __stdcall
      #define VKAPI_PTR  VKAPI_CALL
  #elif defined(__ANDROID__) && defined(__ARM_EABI__) && !defined(__ARM_ARCH_7A__)
      // Android does not support Vulkan in native code using the "armeabi" ABI.
      #error "Vulkan requires the 'armeabi-v7a' or 'armeabi-v7a-hard' ABI on 32-bit ARM CPUs"
  #elif defined(__ANDROID__) && defined(__ARM_ARCH_7A__)
      // On Android/ARMv7a, Vulkan functions use the armeabi-v7a-hard calling
      // convention, even if the application's native code is compiled with the
      // armeabi-v7a calling convention.
      #define VKAPI_ATTR __attribute__((pcs("aapcs-vfp")))
      #define VKAPI_CALL
      #define VKAPI_PTR  VKAPI_ATTR
  #else
      // On other platforms, use the default calling convention
      #define VKAPI_ATTR
      #define VKAPI_CALL
      #define VKAPI_PTR
  #endif
  
  #include <stddef.h>
  
  #if !defined(VK_NO_STDINT_H)
      #if defined(_MSC_VER) && (_MSC_VER < 1600)
          typedef signed   __int8  int8_t;
          typedef unsigned __int8  uint8_t;
          typedef signed   __int16 int16_t;
          typedef unsigned __int16 uint16_t;
          typedef signed   __int32 int32_t;
          typedef unsigned __int32 uint32_t;
          typedef signed   __int64 int64_t;
          typedef unsigned __int64 uint64_t;
      #else
          #include <stdint.h>
      #endif
  #endif // !defined(VK_NO_STDINT_H)
  
  #ifdef __cplusplus
  } // extern "C"
  #endif // __cplusplus
  
  // Platform-specific headers required by platform window system extensions.
  // These are enabled prior to #including "vulkan.h". The same enable then
  // controls inclusion of the extension interfaces in vulkan.h.
  
  #ifdef VK_USE_PLATFORM_ANDROID_KHR
  #include <android/native_window.h>
  #endif
  
  #ifdef VK_USE_PLATFORM_MIR_KHR
  #include <mir_toolkit/client_types.h>
  #endif
  
  #ifdef VK_USE_PLATFORM_WAYLAND_KHR
  #include <wayland-client.h>
  #endif
  
  #ifdef VK_USE_PLATFORM_WIN32_KHR
  #include <windows.h>
  #endif
  
  #ifdef VK_USE_PLATFORM_XLIB_KHR
  #include <X11/Xlib.h>
  #endif
  
  #ifdef VK_USE_PLATFORM_XCB_KHR
  #include <xcb/xcb.h>
  #endif
  
  #endif
  