/*
    Copyright (C) 1998 by Jorrit Tyberghein

    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.
*/

#ifndef __CS_IMGMULTIPLEX_H__
#define __CS_IMGMULTIPLEX_H__

#include "igraphic/imageio.h"
#include "iutil/eventh.h"
#include "iutil/comp.h"
#include "iutil/databuff.h"
#include "iutil/plugin.h"
#include "csutil/cfgacc.h"
#include "csutil/refarr.h"
#include "csutil/scf_implementation.h"
#include "csutil/weakref.h"

CS_PLUGIN_NAMESPACE_BEGIN(ImgPlex)
{

/**
 * Through this plugin you can load/save a set of different formats.
 * It works by loading other plzugins and transfers execution to them.
 */
class csImageIOMultiplexer : 
  public scfImplementation2<csImageIOMultiplexer,
                            iImageIO,
                            iComponent>
{
 protected:
  csRefArray<iImageIO> list;
  csImageIOFileFormatDescriptions formats;
  csConfigAccess config;
  csRef<iStringArray> classlist;
  csWeakRef<iPluginManager> plugin_mgr;
  CS::Threading::Mutex lock;

  void StoreDesc (const csImageIOFileFormatDescriptions& format);
  /**
   * load the next plugin in the class list
   * returns true if more plugins are in the list
   */
  bool LoadNextPlugin ();

 public:
  csImageIOMultiplexer (iBase *pParent);
  virtual ~csImageIOMultiplexer ();

  virtual bool Initialize (iObjectRegistry*);
  virtual const csImageIOFileFormatDescriptions& GetDescription ();
  virtual csPtr<iImage> Load (iDataBuffer* buf, int iFormat);
  virtual csPtr<iDataBuffer> Save (iImage *image, const char *mime = 0,
    const char* extraoptions = 0);
  virtual csPtr<iDataBuffer> Save (iImage *image,
  	iImageIO::FileFormatDescription *format = 0,
    	const char* extraoptions = 0);
};

}
CS_PLUGIN_NAMESPACE_END(ImgPlex)

#endif // __CS_IMGMULTIPLEX_H__
