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sglModelLoader.hpp

/*****************************************************************************
 * SGL: A Scene Graph Library
 *
 * Copyright (C) 1997-2001  Scott McMillan   All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *****************************************************************************
 *     File: sglModelLoader.hpp
 *   Author: Scott McMillan
 *  Created: 15 February 2001
 *  Summary: Abstract base class for all 3D model loaders.
 *****************************************************************************/

#ifndef SGL_MODEL_LOADER
#define SGL_MODEL_LOADER

#include <sgldb.h>
#include <sglDataLoader.hpp>
#include <map>

class sglNode;



class SGLDB_DLL_API sglModelLoader : public sglDataLoader
{
public:
   enum ModeEnum
   {
      eNONE                    = 0x00,  // default
      eSTRIPIFY                = 0x01,
      eCOMPUTE_FACETED_NORMALS = 0x02,
      eCOMPUTE_SMOOTH_NORMALS  = 0x04
   };

   typedef sglNode *(*loaderFunc)(const string &, unsigned int);

   typedef bool (*callbackFunction)( sglNode * node, void * loaderNode, 
                                     string &function, void * userData );

public:
   virtual ~sglModelLoader() = 0;

   static sglNode* loadModel(const string &filepath, unsigned int mode);

   static void registerModelLoader(const string &extension,
                                   loaderFunc model_loader_func);

   static loaderFunc getModelLoader(const string &extension);

   static void registerCallback(const string &extension,
                                   callbackFunction callback_func,
                                                                                                                                         void *userData );

   static callbackFunction getCallback(const string &extension, void **ud );

   static void registerOptionString(const string &extension,
                                    const string &options );

   static string getOptionString(const string &extension);

protected:
   sglModelLoader();
   sglModelLoader(const sglModelLoader &);
   sglModelLoader &operator=(const sglModelLoader &);

private:  // Variables
   static map<string, loaderFunc> s_extension_func_map;
   static map<string, callbackFunction> s_callback_func_map;
   static map<string, void *> s_callback_userdata_map;
   static map<string, string> s_option_map;
   static sglLock s_lock;
};

#endif

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