65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
/**
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* @brief set-resolution - Change the display resolution.
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*
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* @copyright
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2018 K. Lange
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <kernel/video.h>
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int main(int argc, char * argv[]) {
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if (argc < 3) {
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fprintf(stderr, "Usage: %s [--initialize DRIVER] WIDTH HEIGHT\n", argv[0]);
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return 1;
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}
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/* Open framebuffer */
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int fd = open("/dev/fb0", O_RDONLY);
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if (fd < 0) {
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perror("open");
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return 1;
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}
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int i = 1;
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int init = 0;
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char * driver = NULL;
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if (argc > 4 && !strcmp(argv[1],"--initialize")) {
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init = 1;
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driver = argv[2];
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i += 2;
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}
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/* Prepare ioctl from arguments */
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struct vid_size s;
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s.width = atoi(argv[i]);
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s.height = atoi(argv[i+1]);
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/* Send ioctl */
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if (init) {
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char tmp[100];
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sprintf(tmp, "%s,%u,%u", driver, s.width, s.height);
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if (ioctl(fd, IO_VID_REINIT, tmp) < 0) {
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perror("ioctl");
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return 1;
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}
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} else {
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if (ioctl(fd, IO_VID_SET, &s) < 0) {
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perror("ioctl");
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return 1;
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}
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}
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return 0;
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}
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