source: liacs/MIR2010/SourceCode/cximage/ximajas.h@ 192

/*
 * 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