/* $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 #include #include #include #include #include #include #include #include #include void dump_mode __P((int)); void dump_vm __P((struct grfvideo_mode *)); int get_grf __P((void)); void set_mode __P((int)); void usage __P((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)sprintf(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); }