www.pudn.com > cximage602_full.rar > ximajas.h

/* 
 * 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) {}	//  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; 
 
			//  - 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; 
 
			//  - 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; } 
 
	//  
private: 
		jas_stream_ops_t jas_stream_CxFile; 
	//  - end 
 
	}; 
 
}; 
 
#endif 
 
#endif