/*************************************************
/*** @file name: GETbmpinfo* @brief 实现对BMP图片位图信息的获取* @author 15070884254@163.com* @date 2024/05/11* @version 1.0 ：在下坂本，有何贵干 * @property ：none* @note none* CopyRight (c) 2023-2024 15070884254@163.com All Right Reseverd***************************************************/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>#pragma pack(1)typedef struct bitmap_file_header
{unsigned short bftype;unsigned int bfsize;unsigned short bfreserved1;unsigned short bfreserved2;unsigned int bfoffsetbits;
};typedef struct bitmap_info_header
{unsigned int bisize;int width;int height;unsigned short biplanes;unsigned short bidepth;unsigned int bicompression;unsigned int bisizeimage;int x_pels_permeter;int y_pels_permeter;unsigned int color_used;unsigned int color_important;
};
#pragma pack()int main(int argc, char const *argv[])
{// 1.BMP图片的路径是通过命令行传递，所以需要检测参数有效性if (2 != argc){printf("argument is invaild\n");return -1;}// 2.利用系统调用open()打开待读取数据的BMP图片int bmp_fd = open(argv[1], O_RDWR);if (-1 == bmp_fd){printf("open %s is error\n", argv[1]);return -1;}struct bitmap_file_header bmpfile;struct bitmap_info_header bmpinfo;read(bmp_fd,&bmpfile,14);read(bmp_fd,&bmpinfo,40);// 4.输出BMP信息printf("bmp name is %s ,width = %d,height = %d,size = %d\n", argv[1], bmpinfo.width, bmpinfo.height, bmpfile.bfsize);return 0;
}
