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Signed-off-by: AuxXxilium <[email protected]>
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| CFLAGS = -Wall -pedantic | ||
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| all: fbsize | ||
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| fbsize: main.o | ||
| cc -o $@ $^ | ||
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| clean: | ||
| rm -f fbsize *.o |
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| /* | ||
| * Copyright (C) 2022 Ing <https://github.com/wjz304> | ||
| * | ||
| * This is free software, licensed under the MIT License. | ||
| * See /LICENSE for more information. | ||
| * | ||
| */ | ||
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| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <fcntl.h> | ||
| #include <linux/fb.h> | ||
| #include <sys/ioctl.h> | ||
| #include <unistd.h> | ||
| #include <getopt.h> | ||
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| #define VERSION "1.0" | ||
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| int main(int argc, char *argv[]) | ||
| { | ||
| int c; | ||
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| while (1) | ||
| { | ||
| int option_index = 0; | ||
| static struct option long_options[] = { | ||
| {"resolution", required_argument, 0, 'r'}, | ||
| {"buffer", required_argument, 0, 'b'}, | ||
| {"offset", required_argument, 0, 'o'}, | ||
| {"screen", required_argument, 0, 's'}, | ||
| {"help", no_argument, 0, 'h'}, | ||
| {0, 0, 0, 0}}; | ||
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| c = getopt_long(argc, argv, "r:b:o:s:h", long_options, &option_index); | ||
| if (c == -1) | ||
| break; | ||
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| switch (c) | ||
| { | ||
| case 'r': | ||
| case 'b': | ||
| case 'o': | ||
| case 's': | ||
| int fbfd = 0; | ||
| struct fb_var_screeninfo var_info; | ||
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| // 打开设备文件 | ||
| fbfd = open(optarg, O_RDWR); | ||
| if (fbfd == -1) | ||
| { | ||
| perror("Error: cannot open framebuffer device"); | ||
| return 1; | ||
| } | ||
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| // 获取屏幕参数 | ||
| if (ioctl(fbfd, FBIOGET_VSCREENINFO, &var_info) == -1) | ||
| { | ||
| perror("Error reading variable information"); | ||
| return 1; | ||
| } | ||
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| if (c == 'r') | ||
| { | ||
| printf("%dx%d\n", var_info.xres, var_info.yres); | ||
| } | ||
| else if (c == 'b') | ||
| { | ||
| printf("%dx%d\n", var_info.xres_virtual, var_info.yres_virtual); | ||
| } | ||
| else if (c == 'o') | ||
| { | ||
| printf("%dx%d\n", var_info.xoffset, var_info.yoffset); | ||
| } | ||
| else if (c == 's') | ||
| { | ||
| printf("%dx%d\n", var_info.height, var_info.width); | ||
| } | ||
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| // 关闭设备文件 | ||
| close(fbfd); | ||
| break; | ||
| case 'h': | ||
| case '?': | ||
| printf("Usage: %s [options] <framebuffer_device>\n", argv[0]); | ||
| printf("Version: %s\n", VERSION); | ||
| printf("Options:\n"); | ||
| printf(" -r, --resolution Display the resolution of the screen\n"); | ||
| printf(" -b, --buffer Display the resolution of the framebuffer\n"); | ||
| printf(" -o, --offset Display the offset of the screen\n"); | ||
| printf(" -s, --screen Display the size of the screen\n"); | ||
| printf(" -h, --help Display this help message\n"); | ||
| return 0; | ||
| default: | ||
| return 1; | ||
| } | ||
| } | ||
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| return 0; | ||
| } |
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