Application: gvSIG desktop

/* $Id: JpegImageWriter.h 3539 2006-01-09 12:23:20Z nacho $ */

/* //////////////////////////////////////////////////////////////////////////

//                                                                         //

// This code is Copyright (c) 2004 LizardTech, Inc, 1008 Western Avenue,   //

// Suite 200, Seattle, WA 98104.  Unauthorized use or distribution         //

// prohibited.  Access to and use of this code is permitted only under     //

// license from LizardTech, Inc.  Portions of the code are protected by    //

// US and foreign patents and other filings. All Rights Reserved.          //

//                                                                         //

////////////////////////////////////////////////////////////////////////// */

/* PUBLIC */

#ifndef JPEGIMAGEWRITER_H

#define JPEGIMAGEWRITER_H

// lt_lib_mrsid_core

#include "lti_geoFileImageWriter.h"

// system

#include <stdio.h>

#if defined(LT_COMPILER_MS)

   #pragma warning(push,4)

#endif

struct jpeg_compress_struct;

struct jpeg_error_mgr;

LT_BEGIN_NAMESPACE(LizardTech)

class LTFileSpec;

class LTReusableBuffer;

/**

 * writes an image stage to a JPEG file

 *

 * This class writes an image stage to a JPEG file.

 */

class JpegImageWriter : public LTIGeoFileImageWriter

{

public:

   /**

    * constructor

    *

    * Creates a writer for JPEG images.

    *

    * @param  image      the image to write from

    * @param  quality    sets the JPEG "quality" encoding parameter;

    *                    this is a value between 0 and 100

    * @param  smoothing  sets the JPEG "smoothing" encoding parameter;

    *                    this is a value between 0 and 100

    */

   JpegImageWriter(LTIImageStage* image,

                   int quality = 0,          // 0-100

                   int smoothing = 0);       // 0-100

   virtual ~JpegImageWriter();

   LT_STATUS initialize();

   LT_STATUS writeBegin(const LTIScene& scene);

   LT_STATUS writeStrip(LTISceneBuffer& stripBuffer, const LTIScene& stripScene);

   LT_STATUS writeEnd();

private:

   typedef LTIGeoFileImageWriter Super;

   LT_STATUS checkImpedance() const;

   FILE* m_file;

   //struct that contains the JPEG compression parameters

   struct jpeg_compress_struct* m_jpegObject;

   //struct to handle error messages 

   struct jpeg_error_mgr* m_jpegErr;

   //two parameters for setting compression quality

   int m_quality;

   int m_smoothingFactor;

   LTReusableBuffer* m_stripBuffer;

   // nope

   JpegImageWriter();

   JpegImageWriter(JpegImageWriter&);

   JpegImageWriter& operator=(const JpegImageWriter&);

};

LT_END_NAMESPACE(LizardTech)

#if defined(LT_COMPILER_MS)

        #pragma warning(pop)

#endif

#endif // JPEGIMAGEWRITER_H