读与复制.BMP文件

桃扇骨 2022-06-17 07:57 174阅读 0赞

// 读与复制.BMP文件.cpp : Defines the entry point for the console application.  
//

\#include "stdafx.h"  
\#include<iostream>  
\#include "Windows.h"  
\#include<stdio.h>  
using namespace std;

bool readBMP(char \*bmpName);

bool saveBMP(char \*bmpName,unsigned char \*imgBuf,int width,int height,int biBitCount,RGBQUAD \*pColorTable);

unsigned char \*pBmpBuf;  
int bmpWidth;  
int bmpHeight;  
RGBQUAD \*pColorTable;  
int biBitCount;

int \_tmain(int argc, \_TCHAR\* argv\[\])  
\{  
char \*readPath = "58A.BMP";

if(readBMP(readPath))  
\{  
cout<<"read BMP is ok!"<<endl;  
cout<<"width="<<bmpWidth<<" height="<<bmpHeight<<" biBitCount="<<biBitCount<<endl;  
\}  
else  
cout<<"read error!"<<endl;  
  
char \*writePath = "copy58A.BMP";  
if(saveBMP(writePath,pBmpBuf,bmpWidth,bmpHeight,biBitCount,pColorTable))  
cout<<"copy ok!"<<endl;  
else  
cout<<"copy error!"<<endl;

delete\[\] pBmpBuf;  
if(biBitCount==8)  
delete\[\] pColorTable;  
system("pause");  
return 0;  
\}

bool readBMP(char \*bmpName)  
\{  
FILE \*fp = fopen(bmpName,"rb");  
if(fp==NULL)  
return 0;

fseek(fp,sizeof(BITMAPFILEHEADER),0);

BITMAPINFOHEADER head;  
fread(&head,sizeof(BITMAPINFOHEADER),1,fp);

bmpWidth = head.biWidth;  
bmpHeight = head.biHeight;  
biBitCount = head.biBitCount;

int lineByte = (bmpWidth\*biBitCount/8+3)/4\*4;

if(biBitCount==8)  
\{  
pColorTable = new RGBQUAD\[256\];  
fread(pColorTable,sizeof(RGBQUAD),256,fp);  
\}

pBmpBuf = new unsigned char\[lineByte\*bmpHeight\];  
if(pBmpBuf==NULL)  
return 0;  
fclose(fp);

return 1;  
  
\}

bool saveBMP(char \*bmpName,unsigned char \*imgBuf,int width,int height,int biBitCount,RGBQUAD \*pColorTable)  
\{  
if(imgBuf==NULL)  
return 0;  
int colorTableSize = 0;  
if(biBitCount==8)  
colorTableSize = 1024;

int lineByte = (width\*biBitCount/8+3)/4\*4;

FILE \*fp = fopen(bmpName,"wb");  
if(fp==0)  
return 0;  
BITMAPFILEHEADER fileHead;  
fileHead.bfType = 0x4D42;  
fileHead.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + colorTableSize + lineByte;  
fileHead.bfReserved1 = fileHead.bfReserved2 = 0;  
fileHead.bfOffBits = 54 + colorTableSize;

fwrite(&fileHead,sizeof(BITMAPFILEHEADER),1,fp);

BITMAPINFOHEADER head;

head.biBitCount = biBitCount;  
head.biClrImportant = 0;  
head.biClrUsed = 0;  
head.biCompression = 0;  
head.biHeight = height;  
head.biPlanes = 1;  
head.biSize = 40;  
head.biSizeImage = lineByte\*height;  
head.biWidth = width;  
head.biXPelsPerMeter = 0;  
head.biYPelsPerMeter = 0;

fwrite(&head,sizeof(BITMAPINFOHEADER),1,fp);

if(biBitCount==8)  
fwrite(pColorTable,sizeof(RGBQUAD),256,fp);

fwrite(imgBuf,height\*lineByte,1,fp);

fclose(fp);

return 1;  
\}