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display.c revision 1.4 
      1 /*	$NetBSD: display.c,v 1.4 2004/06/03 19:18:41 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Juergen Hannken-Illjes.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/ioctl.h>
     40 #include <sys/time.h>
     41 
     42 #include <stdio.h>
     43 #include <string.h>
     44 #include <errno.h>
     45 #include <err.h>
     46 
     47 #include <dev/wscons/wsconsio.h>
     48 
     49 #include "wsconsctl.h"
     50 
     51 static int dpytype;
     52 static struct wsdisplay_usefontdata font;
     53 static struct wsdisplay_scroll_data scroll_l;
     54 static int havescroll = 1;
     55 
     56 struct field display_field_tab[] = {
     57     { "type",			&dpytype,	FMT_DPYTYPE,	FLG_RDONLY },
     58     { "font",			&font.name,	FMT_STRING,	FLG_WRONLY },
     59     { "scroll.fastlines",	&scroll_l.fastlines, FMT_UINT, FLG_MODIFY },
     60     { "scroll.slowlines",	&scroll_l.slowlines, FMT_UINT, FLG_MODIFY },
     61 };
     62 
     63 int display_field_tab_len = sizeof(display_field_tab)/
     64 			     sizeof(display_field_tab[0]);
     65 
     66 static int
     67 init_values(void)
     68 {
     69 	scroll_l.which = 0;
     70 
     71 	if (field_by_value(&scroll_l.fastlines)->flags & FLG_GET)
     72 		scroll_l.which |= WSDISPLAY_SCROLL_DOFASTLINES;
     73 	if (field_by_value(&scroll_l.slowlines)->flags & FLG_GET)
     74 		scroll_l.which |= WSDISPLAY_SCROLL_DOSLOWLINES;
     75 
     76 	return scroll_l.which;
     77 
     78 }
     79 void
     80 display_get_values(fd)
     81 	int fd;
     82 {
     83 	if (field_by_value(&dpytype)->flags & FLG_GET)
     84 		if (ioctl(fd, WSDISPLAYIO_GTYPE, &dpytype) < 0)
     85 			err(1, "WSDISPLAYIO_GTYPE");
     86 
     87 	if (init_values() == 0 || havescroll == 0)
     88 		return;
     89 
     90 	if (ioctl(fd, WSDISPLAYIO_DGSCROLL, &scroll_l) < 0) {
     91 		if (errno != ENODEV)
     92 			err(1, "WSDISPLAYIO_GSCROLL");
     93 		else
     94 			havescroll = 0;
     95 	}
     96 }
     97 
     98 void
     99 display_put_values(fd)
    100 	int fd;
    101 {
    102 	if (field_by_value(&font.name)->flags & FLG_SET) {
    103 		if (ioctl(fd, WSDISPLAYIO_SFONT, &font) < 0)
    104 			err(1, "WSDISPLAYIO_SFONT");
    105 		pr_field(field_by_value(&font.name), " -> ");
    106 	}
    107 
    108 	if (init_values() == 0 || havescroll == 0)
    109 		return;
    110 
    111 	if (scroll_l.which & WSDISPLAY_SCROLL_DOFASTLINES)
    112 		pr_field(field_by_value(&scroll_l.fastlines), " -> ");
    113 	if (scroll_l.which & WSDISPLAY_SCROLL_DOSLOWLINES)
    114 		pr_field(field_by_value(&scroll_l.slowlines), " -> ");
    115 
    116 	if (ioctl(fd, WSDISPLAYIO_DSSCROLL, &scroll_l) < 0) {
    117 		if (errno != ENODEV)
    118 			err (1, "WSDISPLAYIO_DSSCROLL");
    119 		else {
    120 			warnx("scrolling is not supported by this kernel");
    121 			havescroll = 0;
    122 		}
    123 	}
    124 }
    125