////////////////////////////////////////////////////////////
//	JpegFile?-?A?C++?class?to?allow?reading?and?writing?of
//	RGB?and?Grayscale?JPEG?images.
//	It?is?based?on?the?IJG?V.6?code.
//??Download?by?http://www.codesc.net
//	This?class?Copyright?1997?Chris?Losinger
//	This?is?free?to?use?and?modify?provided?my?name?is?
//	included.
//
//	See?jpegfile.h?for?usage.
//
////////////////////////////////////////////////////////////
#include?“stdafx.h“
#include?“JpegFile.h“
#include?“iostream.h“
#include?“fstream.h“
#include?
#ifdef?__cplusplus
	extern?“C“?{
#endif?//?__cplusplus

#include?“jpeglib.h“

#ifdef?__cplusplus
	}
#endif?//?__cplusplus

//
//
//

/*
?*??is?used?for?the?optional?error?recovery?mechanism?shown?in
?*?the?second?part?of?the?example.
?*/

#include?

//?error?handler?to?avoid?those?pesky?exit（0）‘s

struct?my_error_mgr?{
??struct?jpeg_error_mgr?pub;	/*?“public“?fields?*/

??jmp_buf?setjmp_buffer;	/*?for?return?to?caller?*/
};

typedef?struct?my_error_mgr?*?my_error_ptr;

//
//
//

METHODDEF（void）?my_error_exit?（j_common_ptr?cinfo）;

//
//	to?handle?fatal?errors.
//	the?original?JPEG?code?will?just?exit（0）.?can‘t?really
//	do?that?in?Windows....
//

METHODDEF（void）?my_error_exit?（j_common_ptr?cinfo）
{
	/*?cinfo->err?really?points?to?a?my_error_mgr?struct?so?coerce?pointer?*/
	my_error_ptr?myerr?=?（my_error_ptr）?cinfo->err;

	char?buffer[JMSG_LENGTH_MAX];

	/*?Create?the?message?*/
	（*cinfo->err->format_message）?（cinfo?buffer）;

	/*?Always?display?the?message.?*/
	MessageBox（NULLbuffer“JPEG?Fatal?Error“MB_IConstop）;


	/*?Return?control?to?the?setjmp?point?*/
	longjmp（myerr->setjmp_buffer?1）;
}

//?store?a?scanline?to?our?data?buffer
void?j_putRGBScanline（BYTE?*jpegline?
						?int?widthPix
						?BYTE?*outBuf
						?int?row）;

void?j_putGrayScanlineToRGB（BYTE?*jpegline?
						?int?widthPix
						?BYTE?*outBuf
						?int?row）;
//
//	constructor?doesn‘t?do?much?-?there‘s?no?real?class?here...
//

JpegFile::JpegFile（）
{
}

//
//	
//

JpegFile::~JpegFile（）
{
}

//
//	read?a?JPEG?file
//

BYTE?*?JpegFile::JpegFileToRGB（CString?fileName
							???UINT?*width
							???UINT?*height）

{

	//?basic?code?from?IJG?Jpeg?Code?v6?example.c
	*width=0;
	*height=0;
	/*?This?struct?contains?the?JPEG?decompression?parameters?and?pointers?to
	*?working?space?（which?is?allocated?as?needed?by?the?JPEG?library）.
	*/
	struct?jpeg_decompress_struct?cinfo;
	/*?We?use?our?private?extension?JPEG?error?handler.
	*?Note?that?this?struct?must?live?as?long?as?the?main?JPEG?parameter
	*?struct?to?avoid?dangling-pointer?problems.
	*/
	struct?my_error_mgr?jerr;
	/*?More?stuff?*/
	FILE?*?infile=NULL;		/*?source?file?*/

	JSAMPARRAY?buffer;		/*?Output?row?buffer?*/
	int?row_stride;		/*?physical?row?width?in?output?buffer?*/
	char?buf[250];
	/*?In?this?example?we?want?to?open?the?input?file?b

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????978??2016-05-17?14:43??codesc.net\jpeg的顯示\BASIC.H

?????文件??????13954??1997-09-21?15:59??codesc.net\jpeg的顯示\BMPFILE.CPP

?????文件????????942??1997-07-02?01:49??codesc.net\jpeg的顯示\BMPFILE.H

?????文件??????17456??1997-10-14?11:45??codesc.net\jpeg的顯示\DL1QUANT.CPP

?????文件???????1379??1997-10-14?11:45??codesc.net\jpeg的顯示\DL1QUANT.H

?????文件???????2641??1997-09-18?17:50??codesc.net\jpeg的顯示\JCONFIG.H

?????文件??????13632??2000-07-18?09:19??codesc.net\jpeg的顯示\Jmorecfg.h

?????文件??????11953??2016-05-17?14:43??codesc.net\jpeg的顯示\Jpegfile.cpp

?????文件???????6297??2000-11-12?11:45??codesc.net\jpeg的顯示\Jpegfile.h

?????文件??????46297??1997-09-18?17:53??codesc.net\jpeg的顯示\JPEGLIB.H

?????文件?????913846??2000-07-18?09:22??codesc.net\jpeg的顯示\JPEGLIB2.lib

?????文件???????3328??2016-05-17?14:43??codesc.net\jpeg的顯示\Mainfrm.cpp

?????文件???????1173??2000-08-17?10:40??codesc.net\jpeg的顯示\MAINFRM.H

?????文件??????32228??2010-04-21?14:02??codesc.net\jpeg的顯示\mfcapp.aps

?????文件???????3233??2010-04-21?14:02??codesc.net\jpeg的顯示\mfcapp.clw

?????文件???????3921??2016-05-17?14:43??codesc.net\jpeg的顯示\Mfcapp.cpp

?????文件????????988??2000-07-25?08:30??codesc.net\jpeg的顯示\Mfcapp.dep

?????文件???????5471??2000-11-12?12:40??codesc.net\jpeg的顯示\Mfcapp.dsp

?????文件????????535??2000-06-02?15:59??codesc.net\jpeg的顯示\Mfcapp.dsw

?????文件????????929??2000-08-08?15:38??codesc.net\jpeg的顯示\Mfcapp.h

?????文件???????7428??2000-07-25?08:31??codesc.net\jpeg的顯示\Mfcapp.mak

?????文件??????36864??1997-12-28?11:32??codesc.net\jpeg的顯示\MFCAPP.MDP

?????文件??????12330??2000-10-15?18:23??codesc.net\jpeg的顯示\mfcapp.rc

?????文件???????1769??2016-05-17?14:43??codesc.net\jpeg的顯示\MFCDOC.CPP

?????文件???????1037??1997-05-08?12:48??codesc.net\jpeg的顯示\MFCDOC.H

?????文件???????6963??2016-05-17?14:43??codesc.net\jpeg的顯示\Mfcview.cpp

?????文件???????1847??2000-10-15?18:01??codesc.net\jpeg的顯示\Mfcview.h

?????文件???????1532??1997-10-14?11:42??codesc.net\jpeg的顯示\QUANTDLG.CPP

?????文件???????1283??1997-10-14?11:11??codesc.net\jpeg的顯示\QUANTDLG.H

?????文件???????1270??2000-08-25?15:02??codesc.net\jpeg的顯示\RES\bitmap1.bmp

............此處省略15個文件信息