image_io_gif.hpp

ncbi源码

/*
 * ===========================================================================
 * PRODUCTION $Log: image_io_gif.hpp,v $
 * PRODUCTION Revision 1000.2  2004/02/12 22:01:11  gouriano
 * PRODUCTION PRODUCTION: UPGRADED [CORE_001] Dev-tree R1.3
 * PRODUCTION
 * ===========================================================================
 */

#ifndef UTIL_IMAGE__IMAGE_IO_GIF__HPP
#define UTIL_IMAGE__IMAGE_IO_GIF__HPP

/*  $Id: image_io_gif.hpp,v 1000.2 2004/02/12 22:01:11 gouriano Exp $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Authors:  Mike DiCuccio
 *
 * File Description:
 *    CImageIOGif -- interface class for reading/writing CompuServ GIF files
 */

#include "image_io_handler.hpp"
#include <string>

// global-space predeclaration
struct GifFileType;


BEGIN_NCBI_SCOPE

class CImage;


//
// class CImageIOGif
// This is an internal class for handling GIF format files.  It relies on
// libgif / libungif for GIF encoding, and will support compression only if
// that library does
//

class CImageIOGif : public CImageIOHandler
{
public:

    // read GIF images from files
    CImage* ReadImage(CNcbiIstream& istr);
    CImage* ReadImage(CNcbiIstream& istr,
                      size_t x, size_t y, size_t w, size_t h);

    // write images to file in GIF format
    void WriteImage(const CImage& image, CNcbiOstream& ostr,
                    CImageIO::ECompress compress);
    void WriteImage(const CImage& image, CNcbiOstream& ostr,
                    size_t x, size_t y, size_t w, size_t h,
                    CImageIO::ECompress compress);

private:

    void x_UnpackData(GifFileType* fp,
                      const unsigned char* from_data,
                      unsigned char* to_data);

    void x_ReadLine(GifFileType* fp, unsigned char* data);
};


END_NCBI_SCOPE

/*
 * ===========================================================================
 * $Log: image_io_gif.hpp,v $
 * Revision 1000.2  2004/02/12 22:01:11  gouriano
 * PRODUCTION: UPGRADED [CORE_001] Dev-tree R1.3
 *
 * Revision 1.3  2003/12/16 15:49:36  dicuccio
 * Large re-write of image handling.  Added improved error-handling and support
 * for streams-based i/o (via hooks into each client library).
 *
 * Revision 1.2  2003/11/03 15:19:57  dicuccio
 * Added optional compression parameter
 *
 * Revision 1.1  2003/06/03 15:17:13  dicuccio
 * Initial revision of image library
 *
 * ===========================================================================
 */

#endif  // UTIL_IMAGE__IMAGE_IO_GIF__HPP