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/* $NetBSD: videomode.c,v 1.2 1995/10/09 13:52:49 chopps Exp $ */
/*
* Copyright (c) 1995 Christian E. Hopps
* Copyright (c) 1994 Markus Wild
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Markus Wild
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <amiga/dev/grfioctl.h>
#include <amiga/dev/grfvar.h>
#include <unistd.h>
#include <errno.h>
#include <err.h>
#include <stdio.h>
void dump_mode(int);
void dump_vm(struct grfvideo_mode *);
int get_grf(void);
void set_mode(int);
void usage(void);
int
main(argc, argv)
int argc;
char *argv[];
{
int m;
int c;
if (argc == 1) {
dump_mode(0);
return (0);
}
while ((c = getopt(argc, argv, "as:")) != -1) {
switch (c) {
case 'a':
if (optind < argc)
usage();
dump_mode(-1);
return (0);
case 's':
m = atoi(optarg);
if (m == 0 || optind < argc)
usage();
set_mode(m);
return (0);
}
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
dump_mode(atoi(*argv));
return (0);
}
int
get_grf()
{
struct stat stb;
char grfname[80];
int grffd;
/* find out on which ite/grf we are */
if (fstat(0, &stb) == -1)
err(1, "fstat 0");
if (((stb.st_mode & S_IFMT) != S_IFCHR) || !isatty(0))
errx(1, "stdin not a tty");
if (major(stb.st_rdev) != 13)
errx(1, "stdin not an ite device");
(void)snprintf(grfname, sizeof grfname, "/dev/grf%d",
minor(stb.st_rdev) & 0x7);
if ((grffd = open(grfname, 2)) < 0)
err(1, "%s", grfname);
return (grffd);
}
void
dump_mode(m)
int m;
{
struct grfvideo_mode vm;
int num_vm;
int grffd;
grffd = get_grf();
if (ioctl(grffd, GRFGETNUMVM, &num_vm) < 0)
err(1, "GRFGETNUMVM");
if (m > 0 && m > num_vm)
errx(1, "no such mode");
if (m <= 0) {
(void)printf("Current mode:\n");
vm.mode_num = 0;
if (ioctl(grffd, GRFGETVMODE, &vm) == 0)
dump_vm(&vm);
(void)printf("\n");
}
if (m >= 0)
return;
for (m = 1; m <= num_vm; m++) {
vm.mode_num = m;
if (ioctl(grffd, GRFGETVMODE, &vm) == -1)
break;
dump_vm(&vm);
}
}
void
set_mode(m)
int m;
{
int grffd;
grffd = get_grf();
(void)ioctl(grffd, GRFSETVMODE, &m);
}
void
dump_vm(vm)
struct grfvideo_mode *vm;
{
(void)printf("%d: %s\n", vm->mode_num, vm->mode_descr);
(void)printf("pixel_clock = %u, width = %d, height = %d, depth = %d\n",
vm->pixel_clock, vm->disp_width, vm->disp_height, vm->depth);
}
void
usage()
{
(void)fprintf(stderr, "usage: videomode [mode]\n");
(void)fprintf(stderr, "usage: videomode -a\n");
(void)fprintf(stderr, "usage: videomode -s mode\n");
exit(0);
}
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