tprint.c - plan9port - [fork] Plan 9 from user space
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tprint.c (5269B)
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1 #include <stdio.h>
2 #include <math.h>
3 #include "pic.h"
4 #include "y.tab.h"
5
6 void
7 print(void)
8 {
9 obj *p;
10 int i, j, k, m;
11 double x0, y0, x1, y1, ox, oy, dx, dy, ndx, ndy;
12
13 for (i = 0; i < nobj; i++) {
14 p = objlist[i];
15 ox = p->o_x;
16 oy = p->o_y;
17 x1 = 0;
18 if (p->o_count >= 1)
19 x1 = p->o_val[0];
20 y1 = 0;
21 if (p->o_count >= 2)
22 y1 = p->o_val[1];
23 m = p->o_mode;
24 switch (p->o_type) {
25 case TROFF:
26 troff(text[p->o_nt1].t_val);
27 break;
28 case BOX:
29 case BLOCK:
30 x0 = ox - x1 / 2;
31 y0 = oy - y1 / 2;
32 x1 = ox + x1 / 2;
33 y1 = oy + y1 / 2;
34 if (p->o_attr & FILLBIT) {
35 move(x0, y0);
36 fillstart(p->o_fillval);
37 }
38 if (p->o_attr & INVIS || p->o_type == BLOCK)
39 ; /* nothing at all */
40 else if (p->o_attr & (DOTBIT|DASHBIT))
41 dotbox(x0, y0, x1, y1, p->o_attr, p->o_ddval);
42 else
43 box(x0, y0, x1, y1);
44 if (p->o_attr & FILLBIT)
45 fillend();
46 move(ox, oy);
47 dotext(p); /* if there are any text strings */
48 if (ishor(m))
49 move(isright(m) ? x1 : x0, oy); /* right side */
50 else
51 move(ox, isdown(m) ? y0 : y1); /* bottom */
52 break;
53 case BLOCKEND:
54 break;
55 case CIRCLE:
56 if (p->o_attr & FILLBIT)
57 fillstart(p->o_fillval);
58 if ((p->o_attr & INVIS) == 0)
59 circle(ox, oy, x1);
60 if (p->o_attr & FILLBIT)
61 fillend();
62 move(ox, oy);
63 dotext(p);
64 if (ishor(m))
65 move(ox + isright(m) ? x1 : -x1, oy);
66 else
67 move(ox, oy + isup(m) ? x1 : -x1);
68 break;
69 case ELLIPSE:
70 if (p->o_attr & FILLBIT)
71 fillstart(p->o_fillval);
72 if ((p->o_attr & INVIS) == 0)
73 ellipse(ox, oy, x1, y1);
74 if (p->o_attr & FILLBIT)
75 fillend();
76 move(ox, oy);
77 dotext(p);
78 if (ishor(m))
79 move(ox + isright(m) ? x1 : -x1, oy);
80 else
81 move(ox, oy - isdown(m) ? y1 : -y1);
82 break;
83 case ARC:
84 move(ox, oy);
85 dotext(p);
86 if (p->o_attr & HEAD1)
87 arrow(x1 - (y1 - oy), y1 + (x1 - ox),
88 x1, y1, p->o_val[4], p->o_val[5], p->o_val[5]/p->o_val[6]/2, p->o_nhead);
89 if (p->o_attr & INVIS)
90 /* probably wrong when it's cw */
91 move(x1, y1);
92 else
93 arc(ox, oy, x1, y1, p->o_val[2], p->o_val[3]);
94 if (p->o_attr & HEAD2)
95 arrow(p->o_val[2] + p->o_val[3] - oy, p->o_val[3] - (p->o_val[2] - ox),
96 p->o_val[2], p->o_val[3], p->o_val[4], p->o_val[5], -p->o_val[5]/p->o_val[6]/2, p->o_nhead);
97 if (p->o_attr & CW_ARC)
98 move(x1, y1); /* because drawn backwards */
99 break;
100 case LINE:
101 case ARROW:
102 case SPLINE:
103 move((ox + x1)/2, (oy + y1)/2); /* center */
104 dotext(p);
105 if (p->o_attr & HEAD1)
106 arrow(ox + p->o_val[5], oy + p->o_val[6], ox, oy, p->o_val[2], p->o_val[3], 0.0, p->o_nhead);
107 if (p->o_attr & INVIS)
108 move(x1, y1);
109 else if (p->o_type == SPLINE)
110 spline(ox, oy, p->o_val[4], &p->o_val[5], p->o_attr & (DOTBIT|DASHBIT), p->o_ddval);
111 else {
112 dx = ox;
113 dy = oy;
114 for (k=0, j=5; k < p->o_val[4]; k++, j += 2) {
115 ndx = dx + p->o_val[j];
116 ndy = dy + p->o_val[j+1];
117 if (p->o_attr & (DOTBIT|DASHBIT))
118 dotline(dx, dy, ndx, ndy, p->o_attr, p->o_ddval);
119 else
120 line(dx, dy, ndx, ndy);
121 dx = ndx;
122 dy = ndy;
123 }
124 }
125 if (p->o_attr & HEAD2) {
126 dx = ox;
127 dy = oy;
128 for (k = 0, j = 5; k < p->o_val[4] - 1; k++, j += 2) {
129 dx += p->o_val[j];
130 dy += p->o_val[j+1];
131 }
132 arrow(dx, dy, x1, y1, p->o_val[2], p->o_val[3], 0.0, p->o_nhead);
133 }
134 break;
135 case MOVE:
136 case TEXT:
137 move(ox, oy);
138 dotext(p);
139 break;
140 }
141 }
142 }
143
144 #ifndef NOEXPANDDASH
145 void
146 dotline(double x0, double y0, double x1, double y1, int ddtype, double ddval) /* dotted line */
147 {
148 static double prevval = 0.05; /* 20 per inch by default */
149 int i, numdots;
150 double a, b, dx, dy;
151
152 if (ddval == 0)
153 ddval = prevval;
154 prevval = ddval;
155 /* don't save dot/dash value */
156 dx = x1 - x0;
157 dy = y1 - y0;
158 if (ddtype & DOTBIT) {
159 numdots = sqrt(dx*dx + dy*dy) / prevval + 0.5;
160 if (numdots > 0)
161 for (i = 0; i <= numdots; i++) {
162 a = (double) i / (double) numdots;
163 move(x0 + (a * dx), y0 + (a * dy));
164 dot();
165 }
166 } else if (ddtype & DASHBIT) {
167 double d, dashsize, spacesize;
168 d = sqrt(dx*dx + dy*dy);
169 if (d <= 2 * prevval) {
170 line(x0, y0, x1, y1);
171 return;
172 }
173 numdots = d / (2 * prevval) + 1; /* ceiling */
174 dashsize = prevval;
175 spacesize = (d - numdots * dashsize) / (numdots - 1);
176 b = 0;
177 for (i = 0; i < numdots-1; i++) {
178 a = i * (dashsize + spacesize) / d;
179 b = a + dashsize / d;
180 line(x0 + (a*dx), y0 + (a*dy), x0 + (b*dx), y0 + (b*dy));
181 a = b;
182 b = a + spacesize / d;
183 move(x0 + (a*dx), y0 + (a*dy));
184 }
185 line(x0 + (b * dx), y0 + (b * dy), x1, y1);
186 }
187 prevval = 0.05;
188 }
189 #endif
190
191 void
192 dotbox(double x0, double y0, double x1, double y1, int ddtype, double ddval) /* dotted or dashed box */
193 {
194 dotline(x0, y0, x1, y0, ddtype, ddval);
195 dotline(x1, y0, x1, y1, ddtype, ddval);
196 dotline(x1, y1, x0, y1, ddtype, ddval);
197 dotline(x0, y1, x0, y0, ddtype, ddval);
198 }
199
200 void
201 dotext(obj *p) /* print text strings of p in proper vertical spacing */
202 {
203 int i, nhalf;
204
205 nhalf = p->o_nt2 - p->o_nt1 - 1;
206 for (i = p->o_nt1; i < p->o_nt2; i++) {
207 label(text[i].t_val, text[i].t_type, nhalf);
208 nhalf -= 2;
209 }
210 }