text: ///
  /// # Yocto/SceneIO: Tiny library for Yocto/Scene input and output
  ///
  /// Yocto/SceneIO provides loading and saving functionality for scenes
  /// in Yocto/GL. We support a simple to use YAML format, PLY, OBJ and glTF.
  /// The YAML serialization is a straight copy of the in-memory scene data.
  /// To speed up testing, we also support a binary format that is a dump of
  /// the current scene. This format should not be use for archival though.
  ///
  /// Error reporting is done through exceptions using the `io_error` exception.
  ///
  /// ## Scene Loading and Saving
  ///
  /// 1. load a scene with `load_scene()` and save it with `save_scene()`
  ///
  ///
  
  //
  // LICENSE:
  //
  // Copyright (c) 2016 -- 2019 Fabio Pellacini
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  //
  
  #ifndef _YOCTO_SCENEIO_H_
  #define _YOCTO_SCENEIO_H_
  
  // -----------------------------------------------------------------------------
  // INCLUDES
  // -----------------------------------------------------------------------------
  
  #include <atomic>
  #include "yocto_scene.h"
  
  // -----------------------------------------------------------------------------
  // SCENE IO FUNCTIONS
  // -----------------------------------------------------------------------------
  
  namespace yocto {
  
  /// Scene load params
  struct load_params {
    bool               notextures  = false;
    bool               facevarying = false;
    std::atomic<bool>* cancel      = nullptr;
    bool               noparallel  = false;
  };
  
  /// Scene save params
  struct save_params {
    bool               notextures   = false;
    bool               objinstances = false;
    std::atomic<bool>* cancel       = nullptr;
    bool               noparallel   = false;
  };
  
  /// Load/save a scene in the supported formats.
  void load_scene(
      const string& filename, yocto_scene& scene, const load_params& params = {});
  void save_scene(const string& filename, const yocto_scene& scene,
      const save_params& params = {});
  
  /// Load/save scene textures
  void load_texture(yocto_texture& texture, const string& dirname);
  void save_texture(const yocto_texture& texture, const string& dirname);
  void load_voltexture(yocto_voltexture& texture, const string& dirname);
  void save_voltexture(const yocto_voltexture& texture, const string& dirname);
  void load_textures(
      yocto_scene& scene, const string& dirname, const load_params& params);
  void save_textures(
      const yocto_scene& scene, const string& dirname, const save_params& params);
  
  /// Load/save scene shapes
  void load_shape(yocto_shape& shape, const string& dirname);
  void save_shape(const yocto_shape& shape, const string& dirname);
  void load_subdiv(yocto_subdiv& subdiv, const string& dirname);
  void save_subdiv(const yocto_subdiv& subdiv, const string& dirname);
  void load_shapes(
      yocto_scene& scene, const string& dirname, const load_params& params);
  void save_shapes(
      const yocto_scene& scene, const string& dirname, const save_params& params);
  
  }  // namespace yocto
  
  #endif
  