C++读取bmp图档

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fstream file;int x = 0,y = 0; WORD bmpId;IBYTE fileSize;WORD bmpReserved1;WORD bmpReserved2;IBYTE bmpOffset;IBYTE bmpInfoHeaderSize;IWORD bmpWidth;IWORD bmpHeight;WORD bmpPlanes;WORD bmpbitCount;IWORD bmpCompression;IWORD bmpDataSize;IWORD bmpXPixelPerMeter;IWORD bmpYPixelPerMeter;IBYTE bmpColorUsed;IBYTE bmpColorImportant; TotalGray = 0;//以Dialog方式开启档案CFileDialog fd(true,"bmp","*.bmp",OFN_HIDEREADONLY,"BMP Files(*.bmp)");    if(fd.DoModal() == IDOK)  //按下OK {        //开启档案成功CString str = fd.GetPathName(); //取得开启档案的全名(包含路径)file.open(str, ios::in|ios::binary);file.read((char*)&bmpId, sizeof(WORD));file.read((char*)&fileSize, sizeof(IBYTE));file.read((char*)&bmpReserved1, sizeof(WORD));file.read((char*)&bmpReserved2, sizeof(WORD));file.read((char*)&bmpOffset, sizeof(IBYTE));file.read((char*)&bmpInfoHeaderSize, sizeof(IBYTE));file.read((char*)&bmpWidth, sizeof(IWORD));file.read((char*)&bmpHeight, sizeof(IWORD));file.read((char*)&bmpPlanes, sizeof(WORD));file.read((char*)&bmpbitCount, sizeof(WORD)); file.read((char*)&bmpCompression, sizeof(IWORD));file.read((char*)&bmpDataSize, sizeof(IWORD)); file.read((char*)&bmpXPixelPerMeter, sizeof(IWORD));file.read((char*)&bmpYPixelPerMeter, sizeof(DWORD));file.read((char*)&bmpColorUsed, sizeof(IBYTE));file.read((char*)&bmpColorImportant, sizeof(IBYTE));y = ImageY-1;x = 0;do{x = 0;do{char chR,chG,chB;int inR,inG,inB;file.get(chB);file.get(chG);file.get(chR);if(chR<0)inR = (int)chR+255;elseinR = (int)chR;if(chG<0)inG = 255 + (int)chG;elseinG = chG;if(chB<0)inB = 255 + (int)chB;elseinB = chB;Metrix[x][y].SetXY(x,y);Metrix[x][y].SetB(inB);Metrix[x][y].SetG(inG);Metrix[x][y].SetR(inR);x++;}while(x<ImageX);y--;}while(y>=0);}file.close();