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