source: liacs/MIR2010/SourceCode/cximage/ximajas.h@ 422

/*

 * File:        ximajas.h

 * Purpose:     Jasper Image Class Loader and Writer

 */

/* ==========================================================

 * CxImageJAS (c) 12/Apr/2003 Davide Pizzolato - www.xdp.it

 * For conditions of distribution and use, see copyright notice in ximage.h

 *

 * based on JasPer Copyright (c) 2001-2003 Michael David Adams - All rights reserved.

 * ==========================================================

 */

#if !defined(__ximaJAS_h)

#define __ximaJAS_h



#include "ximage.h"



#if CXIMAGE_SUPPORT_JASPER



#include "../jasper/include/jasper/jasper.h"



class CxImageJAS: public CxImage

{

public:

        CxImageJAS(): CxImage((DWORD)0) {}      // <vho> cast to DWORD



//      bool Load(const TCHAR * imageFileName){ return CxImage::Load(imageFileName,0);}

//      bool Save(const TCHAR * imageFileName){ return CxImage::Save(imageFileName,0);}

        bool Decode(CxFile * hFile, DWORD imagetype = 0);

        bool Decode(FILE *hFile, DWORD imagetype = 0) { CxIOFile file(hFile); return Decode(&file,imagetype); }



#if CXIMAGE_SUPPORT_ENCODE

        bool Encode(CxFile * hFile, DWORD imagetype = 0);

        bool Encode(FILE *hFile, DWORD imagetype = 0) { CxIOFile file(hFile); return Encode(&file,imagetype); }

#endif // CXIMAGE_SUPPORT_ENCODE

protected:



        class CxFileJas

        {

        public:

                CxFileJas(CxFile* pFile,jas_stream_t *stream)

                {

                        if (stream->obj_) jas_free(stream->obj_);

                        stream->obj_ = pFile;



                        // <vho> - cannot set the stream->ops_->functions here,

                        // because this overwrites a static structure in the Jasper library.

                        // This structure is used by Jasper for internal operations too, e.g. tempfile.

                        // However the ops_ pointer in the stream can be overwritten.



                        //stream->ops_->close_ = JasClose;

                        //stream->ops_->read_  = JasRead;

                        //stream->ops_->seek_  = JasSeek;

                        //stream->ops_->write_ = JasWrite;



                        jas_stream_CxFile.close_ = JasClose;

                        jas_stream_CxFile.read_  = JasRead;

                        jas_stream_CxFile.seek_  = JasSeek;

                        jas_stream_CxFile.write_ = JasWrite;



                        stream->ops_ = &jas_stream_CxFile;



                        // <vho> - end

                }

                static int JasRead(jas_stream_obj_t *obj, char *buf, int cnt)

                {               return ((CxFile*)obj)->Read(buf,1,cnt); }

                static int JasWrite(jas_stream_obj_t *obj, char *buf, int cnt)

                {               return ((CxFile*)obj)->Write(buf,1,cnt); }

                static long JasSeek(jas_stream_obj_t *obj, long offset, int origin)

                {               return ((CxFile*)obj)->Seek(offset,origin); }

                static int JasClose(jas_stream_obj_t * /*obj*/)

                {               return 1; }



        // <vho>

private:

                jas_stream_ops_t jas_stream_CxFile;

        // <vho> - end



        };



};



#endif



#endif