用C语言打开位图文件

 void CFishEyeKernel::OpenBitmapFile(PBITMAPINFO pbmi, PBITMAP pbmp, const char *path){if(NULL == path){return;}FILE *fp=fopen(path,"r");if(NULL == fp){return;}BITMAPFILEHEADER fileheader;BITMAPINFO info;fread(&fileheader,sizeof(fileheader),1,fp);if(fileheader.bfType!=0x4D42){//不是BMP位图文件fclose(fp);return;}//读位图头部fread(&info.bmiHeader, sizeof(BITMAPINFOHEADER), 1, fp);//位图宽度long width=info.bmiHeader.biWidth;//位图高度long height=info.bmiHeader.biHeight;//WIDTHBYTE int widthByte = WIDTHBYTE(width, info.bmiHeader.biBitCount);DWORD size;if (info.bmiHeader.biClrUsed != 0){//带颜色表size = info.bmiHeader.biSizeImage;}else{//不带颜色表的size = height*widthByte;} if(NULL != m_pFileData){delete []m_pFileData;m_pFileData = NULL;}m_pFileData = new UCHAR[size];//分配缓冲区if(m_pFileData == NULL){return; }//忽略头部字节fseek(fp,fileheader.bfOffBits,0);fread(m_pFileData, size, 1, fp); fclose(fp);}