49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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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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* set-resolution - Change the display resolution.
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*
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* Simple tool to interface with the IO_VID_SET ioctl.
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*
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* TODO: This is probably something we should request from the
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* compositor rather than a separate application...
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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 width height\n", argv[0]);
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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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/* Prepare ioctl from arguments */
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struct vid_size s;
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s.width = atoi(argv[1]);
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s.height = atoi(argv[2]);
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/* Send ioctl */
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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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return 0;
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}
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