xref: /onnv-gate/usr/src/lib/libplot/t4014/common/subr.c (revision 0:68f95e015346)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 /*
27  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
28  * Use is subject to license terms.
29  */
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.2	*/
32 /*LINTLIBRARY*/
33 
34 #include <stdlib.h>
35 #include <stdio.h>
36 #include "con.h"
37 
38 float obotx = 0.0;
39 float oboty = 0.0;
40 float botx = 0.0;
41 float boty = 0.0;
42 float scalex = 1.0;
43 float scaley = 1.0;
44 int scaleflag = 0;
45 int oloy = -1;
46 int ohiy = -1;
47 int ohix = -1;
48 int oextra = -1;
49 
50 
51 void
putch(char c)52 putch(char c)
53 {
54 	(void) putc(c, stdout);
55 }
56 
57 void
cont(short x,short y)58 cont(short x, short y)
59 {
60 	short hix, hiy, lox, loy, extra;
61 	short n;
62 	x = (short)((x - obotx) * scalex + botx);
63 	y = (short)((y - oboty) * scaley + boty);
64 	hix = (x>>7) & 037;
65 	hiy = (y>>7) & 037;
66 	lox = (x>>2) & 037;
67 	loy = (y>>2) & 037;
68 	extra = x & 03 + (y<<2) & 014;
69 	n = (abs(hix - ohix) + abs(hiy - ohiy) + 6) / 12;
70 	if (hiy != ohiy) {
71 		putch(hiy|040);
72 		ohiy = hiy;
73 	}
74 	if (hix != ohix) {
75 		if (extra != oextra) {
76 			putch(extra|0140);
77 			oextra = extra;
78 		}
79 		putch(loy|0140);
80 		putch(hix|040);
81 		ohix = hix;
82 		oloy = loy;
83 	} else {
84 		if (extra != oextra) {
85 			putch(extra|0140);
86 			putch(loy|0140);
87 			oextra = extra;
88 			oloy = loy;
89 		} else if (loy != oloy) {
90 			putch(loy|0140);
91 			oloy = loy;
92 		}
93 	}
94 	putch(lox|0100);
95 	while (n--)
96 		putch(0);
97 }
98