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