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/*
* offset.c
*
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
* Copyright (C) 2009-2012 Tomi Valkeinen
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <getopt.h>
#include <time.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <linux/fb.h>
#define ERROR(x) printf("fbtest error in line %s:%d: %s\n", __FUNCTION__, __LINE__, strerror(errno));
#define FBCTL(cmd, arg) \
if(ioctl(fd, cmd, arg) == -1) { \
ERROR("ioctl failed"); \
exit(1); }
#define FBCTL0(cmd) \
if(ioctl(fd, cmd) == -1) { \
ERROR("ioctl failed"); \
exit(1); }
int main(int argc, char** argv)
{
char str[64];
int fd;
struct fb_var_screeninfo var;
int opt;
int req_fb = 0;
printf("offset %d.%d.%d (%s)\n", VERSION, PATCHLEVEL, SUBLEVEL,
VERSION_NAME);
while ((opt = getopt(argc, argv, "f:")) != -1) {
switch (opt) {
case 'f':
req_fb = atoi(optarg);
break;
default:
printf("usage: %s [-f <fbnum>] <x> <y>\n", argv[0]);
exit(EXIT_FAILURE);
}
}
if (argc - optind != 2) {
printf("usage: %s [-f <fbnum>] <x> <y>\n", argv[0]);
exit(EXIT_FAILURE);
}
sprintf(str, "/dev/fb%d", req_fb);
fd = open(str, O_RDWR);
FBCTL(FBIOGET_VSCREENINFO, &var);
var.xoffset = atoi(argv[optind + 0]);
var.yoffset = atoi(argv[optind + 1]);
FBCTL(FBIOPUT_VSCREENINFO, &var);
return 0;
}
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