【jsp学校网站源码】【帝国企业源码】【解析elf文件源码】jpg文件源码

【jsp学校网站源码】【帝国企业源码】【解析elf文件源码】jpg文件源码_jpeg源码

时间：2024-12-28 05:33:33 来源：linux dnw源码解析作者：android5.1源码

1.å¦ä½ç¨Visual Studioç¼è¯IJG JPEGåº
2.å¦ä½ä½¿ç¨libjpeg

jpg文件源码_jpeg源码

å¦ä½ç¨Visual Studioç¼è¯IJG JPEGåº

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ããD:\libjpeg\jpeg-9>nmake -f makefile.vc setup-v

ããè¾åºï¼

ããMicrosoft (R) Program Maintenance Utility Version ...

ããren jconfig.vc jconfig.h

ããren makejsln.v jpeg.sln

ããren makeasln.v apps.sln

ããren makejvcx.v jpeg.vcxproj

ããren makejfil.v jpeg.vcxproj.filters

ããren makecvcx.v cjpeg.vcxproj

ããren makecfil.v cjpeg.vcxproj.filters

ããren makedvcx.v djpeg.vcxproj

ããren makedfil.v djpeg.vcxproj.filters

ããren maketvcx.v jpegtran.vcxproj

ããren maketfil.v jpegtran.vcxproj.filters

ããren makervcx.v rdjpgcom.vcxproj

ããren makerfil.v rdjpgcom.vcxproj.filters

ããren makewvcx.v wrjpgcom.vcxproj

ããren makewfil.v wrjpgcom.vcxproj.filters

ãã...\..\Release\jpeg.lib

ãã========== Build: 1 succeeded,码j码jsp学校网站源码 0 failed, 0 up-to-date, 0 skipped ==========

å¦ä½ä½¿ç¨libjpeg

ããä¸ãå»ºç«ç¼è¯ç¯å¢

// TestLibjpeg.cpp : Defines the entry point for the console application.

#include "stdafx.h"

#include "memory.h"

extern "C" {

#include "jpeglib.h"

}

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ãã1ãç³è¯·å¹¶åå§åjpegåç¼©å¯¹è±¡ï¼åæ¶è¦æå®éè¯¯å¤çå¨

struct jpeg_compress_struct jcs;

// å£°æéè¯¯å¤çå¨ï¼å¹¶èµå¼ç»jcs.errå

struct jpeg_error_mgr jem;

jcs.err = jpeg_std_error(&jem);

jpeg_create_compress(&jcs);

f=fopen(".jpg","wb");

if (f==NULL)

{

delete [] data;

delete [] pDataConv;

return 0;

}

jpeg_stdio_dest(&jcs, f);

jcs.image_width = nWidth; // ä¸ºå¾çå®½åé«ï¼åä½ä¸ºåç´

jcs.image_height = nHeight;

jcs.input_components = 1; // å¨æ¤ä¸º1,è¡¨ç¤ºç°åº¦å¾ï¼ å¦ææ¯å½©è²ä½å¾ï¼åä¸º3

jcs.in_color_space = JCS_GRAYSCALE; //JCS_GRAYSCALEè¡¨ç¤ºç°åº¦å¾ï¼JCS_RGBè¡¨ç¤ºå½©è²å¾å

jpeg_set_defaults(&jcs);

jpeg_set_quality (&jcs, , true);

jpeg_start_compress(&jcs, TRUE);

JSAMPROW row_pointer[1]; // ä¸è¡ä½å¾

int row_stride; // æ¯ä¸è¡çåèæ°

row_stride = jcs.image_width; // å¦æä¸æ¯ç´¢å¼å¾,æ¤å¤éè¦ä¹ä»¥3

// å¯¹æ¯ä¸è¡è¿è¡åç¼©

while (jcs.next_scanline < jcs.image_height) {

row_pointer[0] = & pDataConv[jcs.next_scanline * row_stride];

jpeg_write_scanlines(&jcs, row_pointer, 1);

}

jpeg_finish_compress(&jcs);

jpeg_destroy_compress(&jcs);

struct jpeg_decompress_struct cinfo;

struct jpeg_error_mgr jerr;

cinfo.err = jpeg_std_error(&jerr);

jpeg_create_decompress(&cinfo);

FILE *f = fopen(strSourceFileName,"rb");

if (f==NULL)

{

printf("Open file error!\n");

return;

}

jpeg_stdio_src(&cinfo, f);

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jpeg_read_header(&cinfo, TRUE);

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data = new BYTE cinfo.image_width*cinfo.image_height*cinfo.num_components];

jpeg_start_decompress(&cinfo);

JSAMPROW row_pointer[1];

while (cinfo.output_scanline < cinfo.output_height)

{

row_pointer[0] = &data[(cinfo.output_height - cinfo.output_scanline-1)*cinfo.image_width*cinfo.num_components];

jpeg_read_scanlines(&cinfo,row_pointer ,

1);

}

jpeg_finish_decompress(&cinfo);

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jpeg_destroy_decompress(&cinfo);

fclose(f);

关键词：棋牌源码架设

【jsp学校网站源码】【帝国企业源码】【解析elf文件源码】jpg文件源码_jpeg源码

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