VC6.0图像读取与保存

#include "Windows.h" #include <stdio.h> unsigned char *pBmpBuf; unsigned char *pBmpBuf1; int bmpWidth; int bmpHeight; RGBQUAD *pColorTable; int biBitCount; bool readBmp(char *bmpName) { FILE *fp=fopen(bmpName,"rb"); if(fp==0) 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]; fread(pBmpBuf,1,lineByte * bmpHeight,fp); fclose(fp); return 1; } bool saveBmp(char *bmpName, unsigned char *imgBuf, int width, int height, int biBitCount, RGBQUAD *pColorTable) { if(!imgBuf) 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*height; fileHead.bfReserved1 = 0; 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; } void main() { char readPath[]="1.BMP"; readBmp(readPath); printf("width=%d,height=%d, biBitCount=%d\n",bmpWidth,bmpHeight, biBitCount); char writePath[]="2.BMP"; saveBmp(writePath, pBmpBuf, bmpWidth, bmpHeight, biBitCount, pColorTable); delete []pBmpBuf; if(biBitCount==8) delete []pColorTable; }