用纯C写的读RGB文件格式的代码，返回文件头和数据头，这样再读写数据就容易多了。支持8位，24位RGB图。Linux系统里面RGB图片数据格式存储格式为RGB，从上往下填充；而Windows系统里，RGB图片存储格式为BGR，从文件的最后一行开始填充，所以读取RGB图时得注意。-Written in C with pure RGB file format reading the code, return the first file header and data, so re-read and write data much easier. Support for 8, 24-bit RGB Fig. Linux system inside the RGB image data format storage format for the RGB, from top-down filling　and Windows systems, RGB image storage format is BGR, from the documents began to fill the last line, so readers have to pay attention to RGB map.