/*
 * Copyright (C) 2009 Pablo d'Angelo
 *
 * This file is part of Panomatic.
 *
 * Panomatic is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Panomatic 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Panomatic; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 

#ifndef __lfeat_KeyPointIO_h
#define __lfeat_KeyPointIO_h
 
#include <iostream>
#include <string> 

#include "KeyPoint.h"
#include "KeyPointDetector.h"

namespace lfeat
{

struct LFIMPEX ImageInfo
{
	ImageInfo()
	: width(0), height(0), dimensions(0)
	{ }
	
	ImageInfo(const std::string & filename, int width, int height)
	: filename(filename), width(width), height(height), dimensions(0)
	{ }
	
	std::string   filename;
	int           width;
	int           height;
	int           dimensions;
};


// functions to read keypoints
//bool identifySIFTKeypoints( const std::string & filename);
//ImageInfo loadSIFTKeypoints( const std::string & filename, KeyPointInsertor & insertor);

ImageInfo LFIMPEX loadKeypoints( const std::string & filename, KeyPointVect_t & insertor);


/// Base class for a keypoint writer
class LFIMPEX KeypointWriter
{

protected:
	std::ostream & o;

public:

    KeypointWriter(std::ostream & out=std::cout)
	: o ( out )
	{
	}

	virtual void writeHeader ( const ImageInfo & imageinfo, int nKeypoints, int dims ) = 0;

	virtual void writeKeypoint ( double x, double y, double scale, double orientation, double score, int dims, double * vec ) = 0;

	virtual void writeFooter() = 0;
};

class LFIMPEX SIFTFormatWriter : public KeypointWriter
{

	ImageInfo _image;

public:
    SIFTFormatWriter(std::ostream & out=std::cout)
	 : KeypointWriter(out)
	{
	}

	void writeHeader (const ImageInfo & imageinfo, int nKeypoints, int dims );

	void writeKeypoint ( double x, double y, double scale, double orientation, double score, int dims, double * vec );

	void writeFooter();
};

class LFIMPEX DescPerfFormatWriter : public KeypointWriter
{

	ImageInfo _image;

public:
    DescPerfFormatWriter(std::ostream & out=std::cout)
	 : KeypointWriter(out)
	{
	}

	void writeHeader (const ImageInfo & imageinfo, int nKeypoints, int dims );

	void writeKeypoint ( double x, double y, double scale, double orientation, double score, int dims, double * vec );

	void writeFooter();
};


class LFIMPEX AutopanoSIFTWriter : public KeypointWriter
{
	
public:
    AutopanoSIFTWriter(std::ostream & out=std::cout)
	 : KeypointWriter(out)
	{
	}

	void writeHeader ( const ImageInfo & imageinfo, int nKeypoints, int dims );

	void writeKeypoint ( double x, double y, double scale, double orientation, double score, int dims, double * vec );

	void writeFooter();
};

}

#endif