#include?
#include
#include?
//#include
#include?“Bmp2Jpeg.h“
#include?

extern?“C“
{
#include?“jpeglib.h“
};

#pragma?comment（lib“libjpeg.lib“）

using?namespace?std;

#pragma?pack（2）??

struct?bmp_fileheader???//文件頭，長度為14Byte固定??
{??
	unsigned?short?bfType;??
	unsigned?long?bfSize;??
	unsigned?short?bfReserved1;??
	unsigned?short?bfReserved2;??
	unsigned?long?bfOffBits;??
};??

struct?bmp_infoheader??//文件信息頭，長度為40Byte固定??
{??
	unsigned?long?biSize;??
	unsigned?long?biWidth;??
	unsigned?long?biHeight;??
	unsigned?short?biPlanes;??
	unsigned?short?biBitCount;??
	unsigned?long?biCompression;??
	unsigned?long?biSizeImage;??
	unsigned?long?biXPelsPerMeter;??
	unsigned?long?biYPelsPerMeter;??
	unsigned?long?biClrUsed;??
	unsigned?long?biClrImportant;??
};?

struct?RGBPallete
{
	unsigned?char?b;
	unsigned?char?g;
	unsigned?char?r;
	unsigned?char?alpha;
};

CBmp2Jpeg::CBmp2Jpeg（）?:
	m_quality（JPEG_QUALITY）
{

}

CBmp2Jpeg::~CBmp2Jpeg（）
{

}
/*===================================================================================
function:???????jpeg壓縮
input:??????????1:生成的文件名2:bmp的指針3:位圖寬度4:位圖高度5:顏色深度
return:?????????int
description:????bmp的像素格式為（RGB）
===================================================================================*/
int?CBmp2Jpeg::SaveJpeg（const?char?*filename?unsigned?char?*bits?int?width?int?height?int?depth）
{
	FILE?*?outfile;?????????????????/*?target?file?*/
	fopen_s（&outfile?filename?“wb“）;
	if?（outfile?==?NULL）?{
		return?-1;
	}

	struct?jpeg_compress_struct?cinfo;
	struct?jpeg_error_mgr?jerr;

	cinfo.err?=?jpeg_std_error（&jerr）;
	jpeg_create_compress（&cinfo）;

	jpeg_stdio_dest（&cinfo?outfile）;

	cinfo.image_width?=?width;??????/*?image?width?and?height?in?pixels?*/
	cinfo.image_height?=?height;
	cinfo.input_components?=?3;?????????/*?#?of?color?components?per?pixel?*/
	cinfo.in_color_space?=?JCS_RGB;?????????/*?colorspace?of?input?image?*/

	jpeg_set_defaults（&cinfo）;
	jpeg_set_quality（&cinfo?m_quality?TRUE?/*?limit?to?baseline-JPEG?values?*/）;

	jpeg_start_compress（&cinfo?TRUE）;

	JSAMPROW?row_pointer[1];????????/*?pointer?to?JSAMPLE?row[s]?*/
	int?????row_stride;?????????????/*?physical?row?width?in?image?buffer?*/
	row_stride?=?width?*?depth;?/*?JSAMPLEs?per?row?in?image_buffer?*/

	while?（cinfo.next_scanline?		//這里我做過修改，由于jpg文件的圖像是倒的，所以改了一下讀的順序
		//row_pointer[0]?=?&?bits[cinfo.next_scanline?*?row_stride];
		row_pointer[0]?=?&?bits[（cinfo.image_height?-?cinfo.next_scanline?-?1）?*?row_stride];
		（void）?jpeg_write_scanlines（&cinfo?row_pointer?1）;
	}

	jpeg_finish_compress（&cinfo）;
	fclose（outfile）;

	jpeg_destroy_compress（&cinfo）;
	return?0;
}

void?CBmp2Jpeg::InitFileHeader（void?*pFile?void?*fileHeader）
{
	bmp_fileheader?*pfileHeader?=?（bmp_fileheader?*）fileHeader;
	fstream?*filein?=?（fstream?*）pFile;
	//初始化文件頭
	pfileHeader-

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

????..A..H.?????33280??2018-05-22?10:06??Bmp2jpeg\.vs\Bmp2jpeg\v14\.suo

?????文件????6220854??2017-06-22?11:19??Bmp2jpeg\Bmp2jpeg\111_24.bmp

?????文件?????276598??2017-06-22?10:59??Bmp2jpeg\Bmp2jpeg\16.bmp

?????文件????2211894??2017-06-22?10:57??Bmp2jpeg\Bmp2jpeg\2017622105730.bmp

?????文件????2211894??2017-06-22?11:00??Bmp2jpeg\Bmp2jpeg\24.bmp

?????文件?????554038??2017-06-22?11:00??Bmp2jpeg\Bmp2jpeg\256.bmp

?????文件???????7690??2017-06-22?11:31??Bmp2jpeg\Bmp2jpeg\Bmp2Jpeg.cpp

?????文件????????723??2017-06-22?11:31??Bmp2jpeg\Bmp2jpeg\Bmp2Jpeg.h

?????文件???????4224??2017-06-22?13:50??Bmp2jpeg\Bmp2jpeg\Bmp2jpeg.vcxproj

?????文件???????1155??2017-06-22?13:50??Bmp2jpeg\Bmp2jpeg\Bmp2jpeg.vcxproj.filters

?????文件????????143??2017-06-22?10:48??Bmp2jpeg\Bmp2jpeg\Bmp2jpeg.vcxproj.user

?????文件??????????3??2018-05-22?10:05??Bmp2jpeg\Bmp2jpeg\Debug\Bmp2jpeg.log

?????文件????1335146??2017-06-22?13:54??Bmp2jpeg\Bmp2jpeg\lena.jpg

?????文件???????3704??2017-06-22?13:54??Bmp2jpeg\Bmp2jpeg\main.cpp

?????文件????????891??2017-06-22?10:48??Bmp2jpeg\Bmp2jpeg.sln

????..A..H.?????13824??2017-06-22?14:33??Bmp2jpeg\Bmp2jpeg.suo

?????文件???15269888??2017-06-22?10:50??Bmp2jpeg\ipch\bmp2jpeg-ab62d05f\bmp2jpeg-17e0ff43.ipch

?????文件???????5992??2017-04-05?16:18??Bmp2jpeg\jpeglib\jconfig.h

?????文件??????15371??2017-04-05?16:18??Bmp2jpeg\jpeglib\jmorecfg.h

?????文件??????50461??2017-04-05?16:18??Bmp2jpeg\jpeglib\jpeglib.h

?????文件?????835192??2017-04-05?16:18??Bmp2jpeg\jpeglib\libjpeg.lib

?????文件???????1063??2017-04-05?16:18??Bmp2jpeg\jpeglib\readme.txt

?????目錄??????????0??2018-05-22?10:03??Bmp2jpeg\.vs\Bmp2jpeg\v14

?????目錄??????????0??2018-05-22?10:03??Bmp2jpeg\.vs\Bmp2jpeg

?????目錄??????????0??2018-05-22?10:05??Bmp2jpeg\Bmp2jpeg\Debug

?????目錄??????????0??2017-08-08?14:47??Bmp2jpeg\ipch\bmp2jpeg-ab62d05f

????...D.H.?????????0??2018-05-22?10:03??Bmp2jpeg\.vs

?????目錄??????????0??2017-08-08?14:47??Bmp2jpeg\Bmp2jpeg

?????目錄??????????0??2018-05-22?10:05??Bmp2jpeg\Debug

?????目錄??????????0??2017-08-08?14:47??Bmp2jpeg\ipch

............此處省略5個文件信息