126 lines
2.2 KiB
C
126 lines
2.2 KiB
C
/* $NetBSD: videomode.c,v 1.3 1994/10/26 02:07:14 cgd Exp $ */
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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 "../../dev/grfioctl.h"
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#include "../../dev/grfvar.h"
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#include <stdio.h>
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void dump_mode __P((int mode));
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void dump_vm __P((struct grfvideo_mode *vm));
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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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if (argc == 1)
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dump_mode (0);
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else if (! strcmp (argv[1], "-a"))
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dump_mode (-1);
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else if (m = atoi (argv[1]))
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dump_mode (m);
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else if (argc == 3 && !strcmp (argv[1], "-s")
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&& (m = atoi (argv[2])))
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set_mode (m);
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exit (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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{
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perror ("fstat 0");
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exit (1);
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}
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if (((stb.st_mode & S_IFMT) != S_IFCHR) || !isatty(0))
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{
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fprintf (stderr, "stdin not a tty\n");
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exit (1);
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}
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if (major(stb.st_rdev) != 13)
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{
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fprintf (stderr, "stdin not an ite device\n");
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exit (1);
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}
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sprintf (grfname, "/dev/grf%d", minor(stb.st_rdev) & 0x7);
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if ((grffd = open (grfname, 2)) < 0)
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{
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perror (grfname);
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exit (1);
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}
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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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{
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perror ("GRFGETNUMVM");
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exit (1);
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}
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if (m > 0 && m > num_vm)
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{
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fprintf (stderr, "no such mode.\n");
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exit (1);
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}
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if (m <= 0)
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{
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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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printf ("\n");
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}
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if (m < 0)
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{
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for (m = 1; m <= num_vm; m++)
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{
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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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}
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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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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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printf ("%d: %s\n", vm->mode_num, vm->mode_descr);
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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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