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