1 |
greg |
1.7 |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
greg |
1.1 |
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3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
5 |
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#endif |
6 |
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7 |
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/* |
8 |
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* text.c - functions for text patterns and mixtures. |
9 |
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* |
10 |
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* 11/12/86 |
11 |
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*/ |
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13 |
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#include "ray.h" |
14 |
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15 |
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#include "otypes.h" |
16 |
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17 |
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/* |
18 |
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* A text pattern is specified as the text (a file or line), |
19 |
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* the upper left anchor point, the right motion vector, the down |
20 |
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* motion vector, and the foreground and background brightness. |
21 |
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* For a file, the description is as follows: |
22 |
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* |
23 |
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* modifier brighttext id |
24 |
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* 2 fontfile textfile |
25 |
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* 0 |
26 |
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* 11 |
27 |
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* Ax Ay Az |
28 |
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* Rx Ry Rz |
29 |
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* Dx Dy Dz |
30 |
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* foreground background |
31 |
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* |
32 |
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* For a single line, we use: |
33 |
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* |
34 |
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* modifier brighttext id |
35 |
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* N+2 fontfile . This is a line with N words... |
36 |
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* 0 |
37 |
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* 11 |
38 |
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* Ax Ay Az |
39 |
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* Rx Ry Rz |
40 |
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* Dx Dy Dz |
41 |
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* foreground background |
42 |
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* |
43 |
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* Colortext is identical, except colors are given rather than |
44 |
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* brightnesses. Mixtext has foreground and background modifiers: |
45 |
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* |
46 |
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* modifier mixtext id |
47 |
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* 4+ foremod backmod fontfile text.. |
48 |
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* 0 |
49 |
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* 9 |
50 |
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* Ax Ay Az |
51 |
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* Rx Ry Rz |
52 |
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* Dx Dy Dz |
53 |
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*/ |
54 |
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55 |
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#define fndx(m) ((m)->otype==MIX_TEXT ? 2 : 0) |
56 |
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#define tndx(m) ((m)->otype==MIX_TEXT ? 3 : 1) |
57 |
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58 |
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extern char *libpath; /* library search path */ |
59 |
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60 |
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typedef unsigned char GLYPH; |
61 |
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62 |
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typedef struct font { |
63 |
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GLYPH *fg[256]; /* font glyphs */ |
64 |
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char *name; /* font file name */ |
65 |
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struct font *next; /* next font in list */ |
66 |
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} FONT; |
67 |
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68 |
greg |
1.8 |
typedef struct tline { |
69 |
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struct tline *next; /* pointer to next line */ |
70 |
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/* followed by the string */ |
71 |
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} TLINE; |
72 |
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73 |
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#define TLSTR(l) ((char *)(l+1)) |
74 |
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75 |
greg |
1.7 |
typedef struct { |
76 |
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FVECT right, down; /* right and down unit vectors */ |
77 |
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FONT *f; /* our font */ |
78 |
greg |
1.8 |
TLINE tl; /* line list */ |
79 |
greg |
1.7 |
} TEXT; |
80 |
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81 |
greg |
1.6 |
extern char *fgetword(); |
82 |
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83 |
greg |
1.7 |
TEXT *gettext(); |
84 |
greg |
1.1 |
|
85 |
greg |
1.8 |
TLINE *tlalloc(); |
86 |
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|
87 |
greg |
1.7 |
FONT *getfont(); |
88 |
greg |
1.1 |
|
89 |
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static FONT *fontlist = NULL; /* our font list */ |
90 |
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91 |
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92 |
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text(m, r) |
93 |
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register OBJREC *m; |
94 |
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RAY *r; |
95 |
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{ |
96 |
greg |
1.7 |
double v[3]; |
97 |
greg |
1.1 |
int foreground; |
98 |
greg |
1.7 |
/* get transformed position */ |
99 |
greg |
1.4 |
if (r->rox != NULL) |
100 |
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multp3(v, r->rop, r->rox->b.xfm); |
101 |
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else |
102 |
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VCOPY(v, r->rop); |
103 |
greg |
1.7 |
/* check if we are within a text glyph */ |
104 |
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foreground = intext(v, m); |
105 |
greg |
1.1 |
/* modify */ |
106 |
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if (m->otype == MIX_TEXT) { |
107 |
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OBJECT omod; |
108 |
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char *modname = m->oargs.sarg[foreground ? 0 : 1]; |
109 |
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if (!strcmp(modname, VOIDID)) |
110 |
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omod = OVOID; |
111 |
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else if ((omod = modifier(modname)) == OVOID) { |
112 |
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sprintf(errmsg, "undefined modifier \"%s\"", modname); |
113 |
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objerror(m, USER, errmsg); |
114 |
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} |
115 |
greg |
1.7 |
raytexture(r, omod); |
116 |
greg |
1.1 |
} else if (m->otype == PAT_BTEXT) { |
117 |
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if (foreground) |
118 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[9]); |
119 |
greg |
1.1 |
else |
120 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[10]); |
121 |
greg |
1.1 |
} else { /* PAT_CTEXT */ |
122 |
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COLOR cval; |
123 |
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if (foreground) |
124 |
greg |
1.7 |
setcolor(cval, m->oargs.farg[9], |
125 |
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m->oargs.farg[10], |
126 |
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m->oargs.farg[11]); |
127 |
greg |
1.1 |
else |
128 |
greg |
1.7 |
setcolor(cval, m->oargs.farg[12], |
129 |
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m->oargs.farg[13], |
130 |
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m->oargs.farg[14]); |
131 |
greg |
1.1 |
multcolor(r->pcol, cval); |
132 |
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} |
133 |
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} |
134 |
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135 |
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136 |
greg |
1.8 |
TLINE * |
137 |
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tlalloc(s) /* allocate and assign text line */ |
138 |
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char *s; |
139 |
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{ |
140 |
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extern char *strcpy(); |
141 |
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register TLINE *tl; |
142 |
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143 |
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tl = (TLINE *)malloc(sizeof(TLINE)+1+strlen(s)); |
144 |
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if (tl == NULL) |
145 |
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error(SYSTEM, "out of memory in tlalloc"); |
146 |
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tl->next = NULL; |
147 |
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strcpy(TLSTR(tl), s); |
148 |
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return(tl); |
149 |
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} |
150 |
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151 |
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152 |
greg |
1.7 |
TEXT * |
153 |
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gettext(tm) /* get text structure for material */ |
154 |
greg |
1.1 |
register OBJREC *tm; |
155 |
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{ |
156 |
greg |
1.7 |
#define R (tm->oargs.farg+3) |
157 |
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#define D (tm->oargs.farg+6) |
158 |
greg |
1.1 |
extern char *strcpy(), *fgets(); |
159 |
greg |
1.7 |
FVECT DxR; |
160 |
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double d; |
161 |
greg |
1.1 |
FILE *fp; |
162 |
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char linbuf[512]; |
163 |
greg |
1.8 |
TEXT *t; |
164 |
greg |
1.1 |
register int i; |
165 |
greg |
1.8 |
register TLINE *tlp; |
166 |
greg |
1.1 |
register char *s; |
167 |
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|
168 |
greg |
1.7 |
if ((t = (TEXT *)tm->os) != NULL) |
169 |
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return(t); |
170 |
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/* check arguments */ |
171 |
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if (tm->oargs.nsargs - tndx(tm) < 1 || |
172 |
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tm->oargs.nfargs != (tm->otype == PAT_BTEXT ? 11 : |
173 |
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tm->otype == PAT_CTEXT ? 15 : 9)) |
174 |
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objerror(tm, USER, "bad # arguments"); |
175 |
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if ((t = (TEXT *)malloc(sizeof(TEXT))) == NULL) |
176 |
greg |
1.8 |
error(SYSTEM, "out of memory in gettext"); |
177 |
greg |
1.7 |
/* compute vectors */ |
178 |
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fcross(DxR, D, R); |
179 |
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fcross(t->right, DxR, D); |
180 |
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d = DOT(D,D) / DOT(t->right,t->right); |
181 |
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for (i = 0; i < 3; i++) |
182 |
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t->right[i] *= d; |
183 |
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fcross(t->down, R, DxR); |
184 |
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d = DOT(R,R) / DOT(t->down,t->down); |
185 |
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for (i = 0; i < 3; i++) |
186 |
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t->down[i] *= d; |
187 |
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/* get text */ |
188 |
greg |
1.8 |
tlp = &t->tl; |
189 |
greg |
1.7 |
if (tm->oargs.nsargs - tndx(tm) > 1) { /* single line */ |
190 |
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s = linbuf; |
191 |
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for (i = tndx(tm)+1; i < tm->oargs.nsargs; i++) { |
192 |
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strcpy(s, tm->oargs.sarg[i]); |
193 |
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s += strlen(s); |
194 |
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*s++ = ' '; |
195 |
greg |
1.1 |
} |
196 |
greg |
1.7 |
*--s = '\0'; |
197 |
greg |
1.8 |
tlp->next = tlalloc(linbuf); |
198 |
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tlp = tlp->next; |
199 |
greg |
1.7 |
} else { /* text file */ |
200 |
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if ((s = getpath(tm->oargs.sarg[tndx(tm)], |
201 |
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libpath, R_OK)) == NULL) { |
202 |
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sprintf(errmsg, "cannot find text file \"%s\"", |
203 |
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tm->oargs.sarg[tndx(tm)]); |
204 |
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error(USER, errmsg); |
205 |
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} |
206 |
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if ((fp = fopen(s, "r")) == NULL) { |
207 |
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sprintf(errmsg, "cannot open text file \"%s\"", |
208 |
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s); |
209 |
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error(SYSTEM, errmsg); |
210 |
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} |
211 |
greg |
1.8 |
while (fgets(linbuf, sizeof(linbuf), fp) != NULL) { |
212 |
greg |
1.7 |
s = linbuf + strlen(linbuf) - 1; |
213 |
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if (*s == '\n') |
214 |
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*s = '\0'; |
215 |
greg |
1.8 |
tlp->next = tlalloc(linbuf); |
216 |
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tlp = tlp->next; |
217 |
greg |
1.7 |
} |
218 |
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fclose(fp); |
219 |
greg |
1.1 |
} |
220 |
greg |
1.8 |
tlp->next = NULL; |
221 |
greg |
1.7 |
/* get the font */ |
222 |
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t->f = getfont(tm->oargs.sarg[fndx(tm)]); |
223 |
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/* we're done */ |
224 |
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tm->os = (char *)t; |
225 |
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return(t); |
226 |
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#undef R |
227 |
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#undef D |
228 |
greg |
1.1 |
} |
229 |
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|
230 |
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231 |
greg |
1.7 |
freetext(m) /* free text structures associated with m */ |
232 |
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OBJREC *m; |
233 |
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{ |
234 |
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register TEXT *tp; |
235 |
greg |
1.8 |
register TLINE *tlp; |
236 |
greg |
1.7 |
|
237 |
|
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tp = (TEXT *)m->os; |
238 |
|
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if (tp == NULL) |
239 |
|
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return; |
240 |
greg |
1.8 |
for (tlp = tp->tl.next; tlp != NULL; tlp = tlp->next); |
241 |
|
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free(TLSTR(tlp)); |
242 |
greg |
1.7 |
free((char *)tp); |
243 |
|
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m->os = NULL; |
244 |
|
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} |
245 |
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|
246 |
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|
247 |
|
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intext(p, m) /* check to see if p is in text glyph */ |
248 |
|
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FVECT p; |
249 |
greg |
1.8 |
OBJREC *m; |
250 |
greg |
1.7 |
{ |
251 |
|
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register TEXT *tp; |
252 |
greg |
1.8 |
register TLINE *tlp; |
253 |
greg |
1.7 |
double v[3], y, x; |
254 |
greg |
1.8 |
int col; |
255 |
|
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register int lno; |
256 |
greg |
1.7 |
/* first, compute position in text */ |
257 |
|
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v[0] = p[0] - m->oargs.farg[0]; |
258 |
|
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v[1] = p[1] - m->oargs.farg[1]; |
259 |
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v[2] = p[2] - m->oargs.farg[2]; |
260 |
|
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col = x = DOT(v, tp->right); |
261 |
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lno = y = DOT(v, tp->down); |
262 |
|
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if (x < 0.0 || y < 0.0) |
263 |
|
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return(0); |
264 |
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x -= (double)col; |
265 |
|
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y = (lno+1) - y; |
266 |
|
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/* get the font character */ |
267 |
|
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tp = gettext(m); |
268 |
greg |
1.8 |
for (tlp = tp->tl.next; tlp != NULL; tlp = tlp->next) |
269 |
|
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if (--lno < 0) |
270 |
|
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break; |
271 |
|
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if (tlp == NULL || col >= strlen(TLSTR(tlp))) |
272 |
greg |
1.7 |
return(0); |
273 |
greg |
1.8 |
return(inglyph(x, y, tp->f->fg[TLSTR(tlp)[col]])); |
274 |
greg |
1.7 |
} |
275 |
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|
276 |
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|
277 |
greg |
1.1 |
FONT * |
278 |
|
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getfont(fname) /* return font fname */ |
279 |
|
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char *fname; |
280 |
|
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{ |
281 |
greg |
1.6 |
char buf[16]; |
282 |
greg |
1.1 |
FILE *fp; |
283 |
|
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char *pathname, *err; |
284 |
|
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int gn, ngv, gv; |
285 |
|
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register GLYPH *g; |
286 |
|
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register FONT *f; |
287 |
|
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|
288 |
|
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for (f = fontlist; f != NULL; f = f->next) |
289 |
|
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if (!strcmp(f->name, fname)) |
290 |
|
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return(f); |
291 |
|
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/* load the font file */ |
292 |
greg |
1.3 |
if ((pathname = getpath(fname, libpath, R_OK)) == NULL) { |
293 |
greg |
1.1 |
sprintf(errmsg, "cannot find font file \"%s\"", fname); |
294 |
|
|
error(USER, errmsg); |
295 |
|
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} |
296 |
|
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f = (FONT *)calloc(1, sizeof(FONT)); |
297 |
|
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if (f == NULL) |
298 |
|
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goto memerr; |
299 |
|
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f->name = savestr(fname); |
300 |
|
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if ((fp = fopen(pathname, "r")) == NULL) { |
301 |
|
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sprintf(errmsg, "cannot open font file \"%s\"", |
302 |
|
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pathname); |
303 |
|
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error(SYSTEM, errmsg); |
304 |
|
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} |
305 |
greg |
1.6 |
while (fgetword(buf,sizeof(buf),fp) != NULL) { /* get each glyph */ |
306 |
|
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if (!isint(buf)) |
307 |
|
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goto nonint; |
308 |
|
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gn = atoi(buf); |
309 |
greg |
1.1 |
if (gn < 0 || gn > 255) { |
310 |
|
|
err = "illegal"; |
311 |
|
|
goto fonterr; |
312 |
|
|
} |
313 |
|
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if (f->fg[gn] != NULL) { |
314 |
|
|
err = "duplicate"; |
315 |
|
|
goto fonterr; |
316 |
|
|
} |
317 |
greg |
1.6 |
if (fgetword(buf,sizeof(buf),fp) == NULL || !isint(buf) || |
318 |
|
|
(ngv = atoi(buf)) < 0 || ngv > 255) { |
319 |
greg |
1.1 |
err = "bad # vertices for"; |
320 |
|
|
goto fonterr; |
321 |
|
|
} |
322 |
|
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g = (GLYPH *)malloc((2*ngv+1)*sizeof(GLYPH)); |
323 |
|
|
if (g == NULL) |
324 |
|
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goto memerr; |
325 |
|
|
f->fg[gn] = g; |
326 |
|
|
*g++ = ngv; |
327 |
|
|
ngv *= 2; |
328 |
|
|
while (ngv--) { |
329 |
greg |
1.6 |
if (fgetword(buf,sizeof(buf),fp) == NULL || |
330 |
|
|
!isint(buf) || |
331 |
|
|
(gv = atoi(buf)) < 0 || gv > 255) { |
332 |
greg |
1.1 |
err = "bad vertex for"; |
333 |
|
|
goto fonterr; |
334 |
|
|
} |
335 |
|
|
*g++ = gv; |
336 |
|
|
} |
337 |
|
|
} |
338 |
|
|
fclose(fp); |
339 |
|
|
f->next = fontlist; |
340 |
|
|
return(fontlist = f); |
341 |
greg |
1.6 |
nonint: |
342 |
|
|
sprintf(errmsg, "non-integer in font file \"%s\"", pathname); |
343 |
|
|
error(USER, errmsg); |
344 |
greg |
1.1 |
fonterr: |
345 |
|
|
sprintf(errmsg, "%s character (%d) in font file \"%s\"", |
346 |
|
|
err, gn, pathname); |
347 |
|
|
error(USER, errmsg); |
348 |
|
|
memerr: |
349 |
|
|
error(SYSTEM, "out of memory in fontglyph"); |
350 |
|
|
} |
351 |
|
|
|
352 |
|
|
|
353 |
|
|
inglyph(x, y, gl) /* (x,y) within font glyph gl? */ |
354 |
|
|
double x, y; |
355 |
|
|
GLYPH *gl; |
356 |
|
|
{ |
357 |
|
|
int n, ncross; |
358 |
|
|
int xlb, ylb; |
359 |
|
|
register GLYPH *p0, *p1; |
360 |
|
|
|
361 |
greg |
1.7 |
if (gl == NULL) |
362 |
greg |
1.1 |
return(0); |
363 |
greg |
1.5 |
x *= 256.0; /* get glyph coordinates */ |
364 |
|
|
y *= 256.0; |
365 |
|
|
xlb = x + 0.5; |
366 |
|
|
ylb = y + 0.5; |
367 |
greg |
1.1 |
n = *gl++; /* get # of vertices */ |
368 |
|
|
p0 = gl + 2*(n-1); /* connect last to first */ |
369 |
|
|
p1 = gl; |
370 |
|
|
ncross = 0; |
371 |
|
|
/* positive x axis cross test */ |
372 |
|
|
while (n--) { |
373 |
|
|
if ((p0[1] > ylb) ^ (p1[1] > ylb)) |
374 |
|
|
if (p0[0] > xlb && p1[0] > xlb) |
375 |
|
|
ncross++; |
376 |
|
|
else if (p0[0] > xlb || p1[0] > xlb) |
377 |
|
|
ncross += (p1[1] > p0[1]) ^ |
378 |
|
|
((p0[1]-y)*(p1[0]-x) > |
379 |
|
|
(p0[0]-x)*(p1[1]-y)); |
380 |
|
|
p0 = p1; |
381 |
|
|
p1 += 2; |
382 |
|
|
} |
383 |
|
|
return(ncross & 01); |
384 |
|
|
} |