| 25 |
|
extern char *shm_boundary; /* memory sharing boundary */ |
| 26 |
|
|
| 27 |
|
#ifndef MAXASET |
| 28 |
< |
#define MAXASET 2047 /* maximum number of elements in ambient set */ |
| 28 |
> |
#define MAXASET 4095 /* maximum number of elements in ambient set */ |
| 29 |
|
#endif |
| 30 |
|
OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
| 31 |
|
|
| 39 |
|
|
| 40 |
|
#ifndef SORT_THRESH |
| 41 |
|
#ifdef SMLMEM |
| 42 |
< |
#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
| 42 |
> |
#define SORT_THRESH ((16L<<20)/sizeof(AMBVAL)) |
| 43 |
|
#else |
| 44 |
< |
#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
| 44 |
> |
#define SORT_THRESH ((64L<<20)/sizeof(AMBVAL)) |
| 45 |
|
#endif |
| 46 |
|
#endif |
| 47 |
|
#ifndef SORT_INTVL |
| 51 |
|
#define MAX_SORT_INTVL (SORT_INTVL<<6) |
| 52 |
|
#endif |
| 53 |
|
|
| 54 |
+ |
|
| 55 |
+ |
static double qambacc = 0.; /* ambient accuracy to the 1/4 power */ |
| 56 |
|
static double avsum = 0.; /* computed ambient value sum (log) */ |
| 57 |
|
static unsigned int navsum = 0; /* number of values in avsum */ |
| 58 |
|
static unsigned int nambvals = 0; /* total number of indirect values */ |
| 86 |
|
static AMBTREE *newambtree(void); |
| 87 |
|
static void freeambtree(AMBTREE *atp); |
| 88 |
|
|
| 89 |
< |
typedef void unloadtf_t(void *); |
| 89 |
> |
typedef void unloadtf_t(AMBVAL *); |
| 90 |
|
static unloadtf_t avinsert; |
| 91 |
|
static unloadtf_t av2list; |
| 92 |
+ |
static unloadtf_t avfree; |
| 93 |
|
static void unloadatree(AMBTREE *at, unloadtf_t *f); |
| 94 |
|
|
| 95 |
|
static int aposcmp(const void *avp1, const void *avp2); |
| 101 |
|
#endif |
| 102 |
|
|
| 103 |
|
|
| 104 |
< |
extern void |
| 104 |
> |
void |
| 105 |
|
setambres( /* set ambient resolution */ |
| 106 |
|
int ar |
| 107 |
|
) |
| 124 |
|
} |
| 125 |
|
|
| 126 |
|
|
| 127 |
< |
extern void |
| 127 |
> |
void |
| 128 |
|
setambacc( /* set ambient accuracy */ |
| 129 |
|
double newa |
| 130 |
|
) |
| 134 |
|
if (newa < 0.0) |
| 135 |
|
newa = 0.0; |
| 136 |
|
ambdiff = fabs(newa - ambacc); |
| 137 |
< |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
| 138 |
< |
sortambvals(1); /* rebuild tree */ |
| 137 |
> |
if (ambdiff >= .01 && (ambacc = newa) > FTINY) { |
| 138 |
> |
qambacc = sqrt(sqrt(ambacc)); |
| 139 |
> |
if (nambvals > 0) |
| 140 |
> |
sortambvals(1); /* rebuild tree */ |
| 141 |
> |
} |
| 142 |
|
} |
| 143 |
|
|
| 144 |
|
|
| 145 |
< |
extern void |
| 145 |
> |
void |
| 146 |
|
setambient(void) /* initialize calculation */ |
| 147 |
|
{ |
| 148 |
|
int readonly = 0; |
| 149 |
< |
long pos, flen; |
| 149 |
> |
long flen; |
| 150 |
|
AMBVAL amb; |
| 151 |
|
/* make sure we're fresh */ |
| 152 |
|
ambdone(); |
| 153 |
|
/* init ambient limits */ |
| 154 |
|
setambres(ambres); |
| 155 |
< |
setambacc(ambacc); |
| 155 |
> |
qambacc = sqrt(sqrt(ambacc *= (ambacc > FTINY))); |
| 156 |
|
if (ambfile == NULL || !ambfile[0]) |
| 157 |
|
return; |
| 158 |
|
if (ambacc <= FTINY) { |
| 166 |
|
readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
| 167 |
|
if (ambfp != NULL) { |
| 168 |
|
initambfile(0); /* file exists */ |
| 169 |
< |
pos = ftell(ambfp); |
| 169 |
> |
lastpos = ftell(ambfp); |
| 170 |
|
while (readambval(&amb, ambfp)) |
| 171 |
|
avinsert(avstore(&amb)); |
| 172 |
|
nambshare = nambvals; /* share loaded values */ |
| 180 |
|
return; /* avoid ambsync() */ |
| 181 |
|
} |
| 182 |
|
/* align file pointer */ |
| 183 |
< |
pos += (long)nambvals*AMBVALSIZ; |
| 183 |
> |
lastpos += (long)nambvals*AMBVALSIZ; |
| 184 |
|
flen = lseek(fileno(ambfp), (off_t)0, SEEK_END); |
| 185 |
< |
if (flen != pos) { |
| 185 |
> |
if (flen != lastpos) { |
| 186 |
|
sprintf(errmsg, |
| 187 |
|
"ignoring last %ld values in ambient file (corrupted)", |
| 188 |
< |
(flen - pos)/AMBVALSIZ); |
| 188 |
> |
(flen - lastpos)/AMBVALSIZ); |
| 189 |
|
error(WARNING, errmsg); |
| 190 |
< |
fseek(ambfp, pos, 0); |
| 190 |
> |
fseek(ambfp, lastpos, SEEK_SET); |
| 191 |
|
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
| 192 |
< |
ftruncate(fileno(ambfp), (off_t)pos); |
| 192 |
> |
ftruncate(fileno(ambfp), (off_t)lastpos); |
| 193 |
|
#endif |
| 194 |
|
} |
| 195 |
|
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
| 196 |
|
initambfile(1); /* else create new file */ |
| 197 |
+ |
fflush(ambfp); |
| 198 |
+ |
lastpos = ftell(ambfp); |
| 199 |
|
} else { |
| 200 |
|
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
| 201 |
|
error(SYSTEM, errmsg); |
| 202 |
|
} |
| 203 |
< |
nunflshed++; /* lie */ |
| 204 |
< |
ambsync(); |
| 203 |
> |
#ifdef getc_unlocked |
| 204 |
> |
flockfile(ambfp); /* application-level lock */ |
| 205 |
> |
#endif |
| 206 |
> |
#ifdef F_SETLKW |
| 207 |
> |
aflock(F_UNLCK); /* release file */ |
| 208 |
> |
#endif |
| 209 |
|
} |
| 210 |
|
|
| 211 |
|
|
| 212 |
< |
extern void |
| 212 |
> |
void |
| 213 |
|
ambdone(void) /* close ambient file and free memory */ |
| 214 |
|
{ |
| 215 |
|
if (ambfp != NULL) { /* close ambient file */ |
| 223 |
|
lastpos = -1; |
| 224 |
|
} |
| 225 |
|
/* free ambient tree */ |
| 226 |
< |
unloadatree(&atrunk, free); |
| 226 |
> |
unloadatree(&atrunk, &avfree); |
| 227 |
|
/* reset state variables */ |
| 228 |
|
avsum = 0.; |
| 229 |
|
navsum = 0; |
| 235 |
|
} |
| 236 |
|
|
| 237 |
|
|
| 238 |
< |
extern void |
| 238 |
> |
void |
| 239 |
|
ambnotify( /* record new modifier */ |
| 240 |
|
OBJECT obj |
| 241 |
|
) |
| 242 |
|
{ |
| 243 |
|
static int hitlimit = 0; |
| 244 |
< |
register OBJREC *o; |
| 245 |
< |
register char **amblp; |
| 244 |
> |
OBJREC *o; |
| 245 |
> |
char **amblp; |
| 246 |
|
|
| 247 |
|
if (obj == OVOID) { /* starting over */ |
| 248 |
|
ambset[0] = 0; |
| 264 |
|
} |
| 265 |
|
} |
| 266 |
|
|
| 267 |
+ |
/************ THE FOLLOWING ROUTINES DIFFER BETWEEN NEW & OLD ***************/ |
| 268 |
|
|
| 269 |
< |
extern void |
| 270 |
< |
ambient( /* compute ambient component for ray */ |
| 269 |
> |
#ifdef NEWAMB |
| 270 |
> |
|
| 271 |
> |
#define tfunc(lwr, x, upr) (((x)-(lwr))/((upr)-(lwr))) |
| 272 |
> |
|
| 273 |
> |
static double sumambient(COLOR acol, RAY *r, FVECT rn, int al, |
| 274 |
> |
AMBTREE *at, FVECT c0, double s); |
| 275 |
> |
static int makeambient(COLOR acol, RAY *r, FVECT rn, int al); |
| 276 |
> |
static void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv, |
| 277 |
> |
FVECT uvw[3]); |
| 278 |
> |
|
| 279 |
> |
void |
| 280 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
| 281 |
> |
COLOR aval, |
| 282 |
> |
RAY *r, |
| 283 |
> |
FVECT nrm |
| 284 |
> |
) |
| 285 |
> |
{ |
| 286 |
> |
static int rdepth = 0; /* ambient recursion */ |
| 287 |
> |
COLOR acol; |
| 288 |
> |
int ok; |
| 289 |
> |
double d, l; |
| 290 |
> |
|
| 291 |
> |
if (ambdiv <= 0) /* no ambient calculation */ |
| 292 |
> |
goto dumbamb; |
| 293 |
> |
/* check number of bounces */ |
| 294 |
> |
if (rdepth >= ambounce) |
| 295 |
> |
goto dumbamb; |
| 296 |
> |
/* check ambient list */ |
| 297 |
> |
if (ambincl != -1 && r->ro != NULL && |
| 298 |
> |
ambincl != inset(ambset, r->ro->omod)) |
| 299 |
> |
goto dumbamb; |
| 300 |
> |
|
| 301 |
> |
if (ambacc <= FTINY) { /* no ambient storage */ |
| 302 |
> |
copycolor(acol, aval); |
| 303 |
> |
rdepth++; |
| 304 |
> |
ok = doambient(acol, r, r->rweight, NULL, NULL, NULL, NULL); |
| 305 |
> |
rdepth--; |
| 306 |
> |
if (!ok) |
| 307 |
> |
goto dumbamb; |
| 308 |
> |
copycolor(aval, acol); |
| 309 |
> |
return; |
| 310 |
> |
} |
| 311 |
> |
|
| 312 |
> |
if (tracktime) /* sort to minimize thrashing */ |
| 313 |
> |
sortambvals(0); |
| 314 |
> |
/* interpolate ambient value */ |
| 315 |
> |
setcolor(acol, 0.0, 0.0, 0.0); |
| 316 |
> |
d = sumambient(acol, r, nrm, rdepth, |
| 317 |
> |
&atrunk, thescene.cuorg, thescene.cusize); |
| 318 |
> |
if (d > FTINY) { |
| 319 |
> |
d = 1.0/d; |
| 320 |
> |
scalecolor(acol, d); |
| 321 |
> |
multcolor(aval, acol); |
| 322 |
> |
return; |
| 323 |
> |
} |
| 324 |
> |
rdepth++; /* need to cache new value */ |
| 325 |
> |
ok = makeambient(acol, r, nrm, rdepth-1); |
| 326 |
> |
rdepth--; |
| 327 |
> |
if (ok) { |
| 328 |
> |
multcolor(aval, acol); /* computed new value */ |
| 329 |
> |
return; |
| 330 |
> |
} |
| 331 |
> |
dumbamb: /* return global value */ |
| 332 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
| 333 |
> |
multcolor(aval, ambval); |
| 334 |
> |
return; |
| 335 |
> |
} |
| 336 |
> |
l = bright(ambval); /* average in computations */ |
| 337 |
> |
if (l > FTINY) { |
| 338 |
> |
d = (log(l)*(double)ambvwt + avsum) / |
| 339 |
> |
(double)(ambvwt + navsum); |
| 340 |
> |
d = exp(d) / l; |
| 341 |
> |
scalecolor(aval, d); |
| 342 |
> |
multcolor(aval, ambval); /* apply color of ambval */ |
| 343 |
> |
} else { |
| 344 |
> |
d = exp( avsum / (double)navsum ); |
| 345 |
> |
scalecolor(aval, d); /* neutral color */ |
| 346 |
> |
} |
| 347 |
> |
} |
| 348 |
> |
|
| 349 |
> |
|
| 350 |
> |
double |
| 351 |
> |
sumambient( /* get interpolated ambient value */ |
| 352 |
|
COLOR acol, |
| 353 |
< |
register RAY *r, |
| 353 |
> |
RAY *r, |
| 354 |
> |
FVECT rn, |
| 355 |
> |
int al, |
| 356 |
> |
AMBTREE *at, |
| 357 |
> |
FVECT c0, |
| 358 |
> |
double s |
| 359 |
> |
) |
| 360 |
> |
{ /* initial limit is ambacc radians */ |
| 361 |
> |
const double maxangle = (ambacc-PI/2.)*pow(r->rweight,0.13) + PI/2.; |
| 362 |
> |
double wsum = 0.0; |
| 363 |
> |
FVECT ck0; |
| 364 |
> |
int i, j; |
| 365 |
> |
AMBVAL *av; |
| 366 |
> |
/* sum this node */ |
| 367 |
> |
for (av = at->alist; av != NULL; av = av->next) { |
| 368 |
> |
double d, delta_r2, delta_t2; |
| 369 |
> |
COLOR ct; |
| 370 |
> |
FVECT uvw[3]; |
| 371 |
> |
/* record access */ |
| 372 |
> |
if (tracktime) |
| 373 |
> |
av->latick = ambclock; |
| 374 |
> |
/* |
| 375 |
> |
* Ambient level test |
| 376 |
> |
*/ |
| 377 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
| 378 |
> |
break; |
| 379 |
> |
if (av->weight < 0.9*r->rweight) |
| 380 |
> |
continue; |
| 381 |
> |
/* |
| 382 |
> |
* Direction test using unperturbed normal |
| 383 |
> |
*/ |
| 384 |
> |
decodedir(uvw[2], av->ndir); |
| 385 |
> |
d = DOT(uvw[2], r->ron); |
| 386 |
> |
if (d <= 0.0) /* >= 90 degrees */ |
| 387 |
> |
continue; |
| 388 |
> |
delta_r2 = 2.0 - 2.0*d; /* approx. radians^2 */ |
| 389 |
> |
if (delta_r2 >= maxangle*maxangle) |
| 390 |
> |
continue; |
| 391 |
> |
/* |
| 392 |
> |
* Elliptical radii test based on Hessian |
| 393 |
> |
*/ |
| 394 |
> |
decodedir(uvw[0], av->udir); |
| 395 |
> |
VCROSS(uvw[1], uvw[2], uvw[0]); |
| 396 |
> |
VSUB(ck0, av->pos, r->rop); |
| 397 |
> |
d = DOT(ck0, uvw[0]) / av->rad[0]; |
| 398 |
> |
delta_t2 = d*d; |
| 399 |
> |
d = DOT(ck0, uvw[1]) / av->rad[1]; |
| 400 |
> |
delta_t2 += d*d; |
| 401 |
> |
if (delta_t2 >= qambacc*qambacc) |
| 402 |
> |
continue; |
| 403 |
> |
/* |
| 404 |
> |
* Intersection behind test |
| 405 |
> |
*/ |
| 406 |
> |
d = 0.0; |
| 407 |
> |
for (j = 0; j < 3; j++) |
| 408 |
> |
d += (r->rop[j] - av->pos[j])*(uvw[2][j] + r->ron[j]); |
| 409 |
> |
if (d*0.5 < -minarad*qambacc-.001) |
| 410 |
> |
continue; |
| 411 |
> |
/* |
| 412 |
> |
* Extrapolate value and compute final weight (hat function) |
| 413 |
> |
*/ |
| 414 |
> |
extambient(ct, av, r->rop, rn, uvw); |
| 415 |
> |
d = tfunc(maxangle, sqrt(delta_r2), 0.0) * |
| 416 |
> |
tfunc(qambacc, sqrt(delta_t2), 0.0); |
| 417 |
> |
scalecolor(ct, d); |
| 418 |
> |
addcolor(acol, ct); |
| 419 |
> |
wsum += d; |
| 420 |
> |
} |
| 421 |
> |
if (at->kid == NULL) |
| 422 |
> |
return(wsum); |
| 423 |
> |
/* sum children */ |
| 424 |
> |
s *= 0.5; |
| 425 |
> |
for (i = 0; i < 8; i++) { |
| 426 |
> |
for (j = 0; j < 3; j++) { |
| 427 |
> |
ck0[j] = c0[j]; |
| 428 |
> |
if (1<<j & i) |
| 429 |
> |
ck0[j] += s; |
| 430 |
> |
if (r->rop[j] < ck0[j] - OCTSCALE*s) |
| 431 |
> |
break; |
| 432 |
> |
if (r->rop[j] > ck0[j] + (1.0+OCTSCALE)*s) |
| 433 |
> |
break; |
| 434 |
> |
} |
| 435 |
> |
if (j == 3) |
| 436 |
> |
wsum += sumambient(acol, r, rn, al, |
| 437 |
> |
at->kid+i, ck0, s); |
| 438 |
> |
} |
| 439 |
> |
return(wsum); |
| 440 |
> |
} |
| 441 |
> |
|
| 442 |
> |
|
| 443 |
> |
int |
| 444 |
> |
makeambient( /* make a new ambient value for storage */ |
| 445 |
> |
COLOR acol, |
| 446 |
> |
RAY *r, |
| 447 |
> |
FVECT rn, |
| 448 |
> |
int al |
| 449 |
> |
) |
| 450 |
> |
{ |
| 451 |
> |
AMBVAL amb; |
| 452 |
> |
FVECT uvw[3]; |
| 453 |
> |
int i; |
| 454 |
> |
|
| 455 |
> |
amb.weight = 1.0; /* compute weight */ |
| 456 |
> |
for (i = al; i-- > 0; ) |
| 457 |
> |
amb.weight *= AVGREFL; |
| 458 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
| 459 |
> |
amb.weight = 1.25*r->rweight; |
| 460 |
> |
setcolor(acol, AVGREFL, AVGREFL, AVGREFL); |
| 461 |
> |
/* compute ambient */ |
| 462 |
> |
i = doambient(acol, r, amb.weight, uvw, amb.rad, amb.gpos, amb.gdir); |
| 463 |
> |
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
| 464 |
> |
if (i <= 0 || amb.rad[0] <= FTINY) /* no Hessian or zero radius */ |
| 465 |
> |
return(i); |
| 466 |
> |
/* store value */ |
| 467 |
> |
VCOPY(amb.pos, r->rop); |
| 468 |
> |
amb.ndir = encodedir(r->ron); |
| 469 |
> |
amb.udir = encodedir(uvw[0]); |
| 470 |
> |
amb.lvl = al; |
| 471 |
> |
copycolor(amb.val, acol); |
| 472 |
> |
/* insert into tree */ |
| 473 |
> |
avsave(&amb); /* and save to file */ |
| 474 |
> |
if (rn != r->ron) { /* texture */ |
| 475 |
> |
VCOPY(uvw[2], r->ron); |
| 476 |
> |
extambient(acol, &amb, r->rop, rn, uvw); |
| 477 |
> |
} |
| 478 |
> |
return(1); |
| 479 |
> |
} |
| 480 |
> |
|
| 481 |
> |
|
| 482 |
> |
void |
| 483 |
> |
extambient( /* extrapolate value at pv, nv */ |
| 484 |
> |
COLOR cr, |
| 485 |
> |
AMBVAL *ap, |
| 486 |
> |
FVECT pv, |
| 487 |
> |
FVECT nv, |
| 488 |
> |
FVECT uvw[3] |
| 489 |
> |
) |
| 490 |
> |
{ |
| 491 |
> |
static FVECT my_uvw[3]; |
| 492 |
> |
FVECT v1; |
| 493 |
> |
int i; |
| 494 |
> |
double d = 1.0; /* zeroeth order */ |
| 495 |
> |
|
| 496 |
> |
if (uvw == NULL) { /* need local coordinates? */ |
| 497 |
> |
decodedir(my_uvw[2], ap->ndir); |
| 498 |
> |
decodedir(my_uvw[0], ap->udir); |
| 499 |
> |
VCROSS(my_uvw[1], my_uvw[2], my_uvw[0]); |
| 500 |
> |
uvw = my_uvw; |
| 501 |
> |
} |
| 502 |
> |
for (i = 3; i--; ) /* gradient due to translation */ |
| 503 |
> |
d += (pv[i] - ap->pos[i]) * |
| 504 |
> |
(ap->gpos[0]*uvw[0][i] + ap->gpos[1]*uvw[1][i]); |
| 505 |
> |
|
| 506 |
> |
VCROSS(v1, uvw[2], nv); /* gradient due to rotation */ |
| 507 |
> |
for (i = 3; i--; ) |
| 508 |
> |
d += v1[i] * (ap->gdir[0]*uvw[0][i] + ap->gdir[1]*uvw[1][i]); |
| 509 |
> |
|
| 510 |
> |
if (d <= 0.0) { |
| 511 |
> |
setcolor(cr, 0.0, 0.0, 0.0); |
| 512 |
> |
return; |
| 513 |
> |
} |
| 514 |
> |
copycolor(cr, ap->val); |
| 515 |
> |
scalecolor(cr, d); |
| 516 |
> |
} |
| 517 |
> |
|
| 518 |
> |
|
| 519 |
> |
static void |
| 520 |
> |
avinsert( /* insert ambient value in our tree */ |
| 521 |
> |
AMBVAL *av |
| 522 |
> |
) |
| 523 |
> |
{ |
| 524 |
> |
AMBTREE *at; |
| 525 |
> |
AMBVAL *ap; |
| 526 |
> |
AMBVAL avh; |
| 527 |
> |
FVECT ck0; |
| 528 |
> |
double s; |
| 529 |
> |
int branch; |
| 530 |
> |
int i; |
| 531 |
> |
|
| 532 |
> |
if (av->rad[0] <= FTINY) |
| 533 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 534 |
> |
at = &atrunk; |
| 535 |
> |
VCOPY(ck0, thescene.cuorg); |
| 536 |
> |
s = thescene.cusize; |
| 537 |
> |
while (s*(OCTSCALE/2) > av->rad[1]*qambacc) { |
| 538 |
> |
if (at->kid == NULL) |
| 539 |
> |
if ((at->kid = newambtree()) == NULL) |
| 540 |
> |
error(SYSTEM, "out of memory in avinsert"); |
| 541 |
> |
s *= 0.5; |
| 542 |
> |
branch = 0; |
| 543 |
> |
for (i = 0; i < 3; i++) |
| 544 |
> |
if (av->pos[i] > ck0[i] + s) { |
| 545 |
> |
ck0[i] += s; |
| 546 |
> |
branch |= 1 << i; |
| 547 |
> |
} |
| 548 |
> |
at = at->kid + branch; |
| 549 |
> |
} |
| 550 |
> |
avh.next = at->alist; /* order by increasing level */ |
| 551 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 552 |
> |
if (ap->next->lvl >= av->lvl) |
| 553 |
> |
break; |
| 554 |
> |
av->next = ap->next; |
| 555 |
> |
ap->next = (AMBVAL*)av; |
| 556 |
> |
at->alist = avh.next; |
| 557 |
> |
} |
| 558 |
> |
|
| 559 |
> |
|
| 560 |
> |
#else /* ! NEWAMB */ |
| 561 |
> |
|
| 562 |
> |
static double sumambient(COLOR acol, RAY *r, FVECT rn, int al, |
| 563 |
> |
AMBTREE *at, FVECT c0, double s); |
| 564 |
> |
static double makeambient(COLOR acol, RAY *r, FVECT rn, int al); |
| 565 |
> |
static void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv); |
| 566 |
> |
|
| 567 |
> |
|
| 568 |
> |
void |
| 569 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
| 570 |
> |
COLOR aval, |
| 571 |
> |
RAY *r, |
| 572 |
|
FVECT nrm |
| 573 |
|
) |
| 574 |
|
{ |
| 575 |
|
static int rdepth = 0; /* ambient recursion */ |
| 576 |
+ |
COLOR acol; |
| 577 |
|
double d, l; |
| 578 |
|
|
| 579 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
| 587 |
|
goto dumbamb; |
| 588 |
|
|
| 589 |
|
if (ambacc <= FTINY) { /* no ambient storage */ |
| 590 |
+ |
copycolor(acol, aval); |
| 591 |
|
rdepth++; |
| 592 |
|
d = doambient(acol, r, r->rweight, NULL, NULL); |
| 593 |
|
rdepth--; |
| 594 |
|
if (d <= FTINY) |
| 595 |
|
goto dumbamb; |
| 596 |
+ |
copycolor(aval, acol); |
| 597 |
|
return; |
| 598 |
|
} |
| 599 |
|
|
| 600 |
|
if (tracktime) /* sort to minimize thrashing */ |
| 601 |
|
sortambvals(0); |
| 602 |
< |
/* get ambient value */ |
| 602 |
> |
/* interpolate ambient value */ |
| 603 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
| 604 |
|
d = sumambient(acol, r, nrm, rdepth, |
| 605 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
| 606 |
|
if (d > FTINY) { |
| 607 |
< |
scalecolor(acol, 1.0/d); |
| 607 |
> |
d = 1.0/d; |
| 608 |
> |
scalecolor(acol, d); |
| 609 |
> |
multcolor(aval, acol); |
| 610 |
|
return; |
| 611 |
|
} |
| 612 |
|
rdepth++; /* need to cache new value */ |
| 613 |
|
d = makeambient(acol, r, nrm, rdepth-1); |
| 614 |
|
rdepth--; |
| 615 |
< |
if (d > FTINY) |
| 615 |
> |
if (d > FTINY) { |
| 616 |
> |
multcolor(aval, acol); /* got new value */ |
| 617 |
|
return; |
| 618 |
+ |
} |
| 619 |
|
dumbamb: /* return global value */ |
| 620 |
< |
copycolor(acol, ambval); |
| 621 |
< |
if ((ambvwt <= 0) | (navsum == 0)) |
| 620 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
| 621 |
> |
multcolor(aval, ambval); |
| 622 |
|
return; |
| 623 |
+ |
} |
| 624 |
|
l = bright(ambval); /* average in computations */ |
| 625 |
|
if (l > FTINY) { |
| 626 |
|
d = (log(l)*(double)ambvwt + avsum) / |
| 627 |
|
(double)(ambvwt + navsum); |
| 628 |
|
d = exp(d) / l; |
| 629 |
< |
scalecolor(acol, d); /* apply color of ambval */ |
| 629 |
> |
scalecolor(aval, d); |
| 630 |
> |
multcolor(aval, ambval); /* apply color of ambval */ |
| 631 |
|
} else { |
| 632 |
|
d = exp( avsum / (double)navsum ); |
| 633 |
< |
setcolor(acol, d, d, d); /* neutral color */ |
| 633 |
> |
scalecolor(aval, d); /* neutral color */ |
| 634 |
|
} |
| 635 |
|
} |
| 636 |
|
|
| 637 |
|
|
| 638 |
< |
extern double |
| 638 |
> |
static double |
| 639 |
|
sumambient( /* get interpolated ambient value */ |
| 640 |
|
COLOR acol, |
| 641 |
< |
register RAY *r, |
| 641 |
> |
RAY *r, |
| 642 |
|
FVECT rn, |
| 643 |
|
int al, |
| 644 |
|
AMBTREE *at, |
| 650 |
|
COLOR ct; |
| 651 |
|
FVECT ck0; |
| 652 |
|
int i; |
| 653 |
< |
register int j; |
| 654 |
< |
register AMBVAL *av; |
| 653 |
> |
int j; |
| 654 |
> |
AMBVAL *av; |
| 655 |
|
|
| 656 |
|
wsum = 0.0; |
| 657 |
|
/* do this node */ |
| 664 |
|
*/ |
| 665 |
|
if (av->lvl > al) /* list sorted, so this works */ |
| 666 |
|
break; |
| 667 |
< |
if (av->weight < r->rweight-FTINY) |
| 667 |
> |
if (av->weight < 0.9*r->rweight) |
| 668 |
|
continue; |
| 669 |
|
/* |
| 670 |
|
* Ambient radius test. |
| 671 |
|
*/ |
| 672 |
< |
d = av->pos[0] - r->rop[0]; |
| 673 |
< |
e1 = d * d; |
| 353 |
< |
d = av->pos[1] - r->rop[1]; |
| 354 |
< |
e1 += d * d; |
| 355 |
< |
d = av->pos[2] - r->rop[2]; |
| 356 |
< |
e1 += d * d; |
| 357 |
< |
e1 /= av->rad * av->rad; |
| 672 |
> |
VSUB(ck0, av->pos, r->rop); |
| 673 |
> |
e1 = DOT(ck0, ck0) / (av->rad * av->rad); |
| 674 |
|
if (e1 > ambacc*ambacc*1.21) |
| 675 |
|
continue; |
| 676 |
|
/* |
| 687 |
|
} |
| 688 |
|
} |
| 689 |
|
e2 = (1.0 - d) * r->rweight; |
| 690 |
< |
if (e2 < 0.0) e2 = 0.0; |
| 691 |
< |
if (e1 + e2 > ambacc*ambacc*1.21) |
| 690 |
> |
if (e2 < 0.0) |
| 691 |
> |
e2 = 0.0; |
| 692 |
> |
else if (e1 + e2 > ambacc*ambacc*1.21) |
| 693 |
|
continue; |
| 694 |
|
/* |
| 695 |
|
* Ray behind test. |
| 739 |
|
break; |
| 740 |
|
} |
| 741 |
|
if (j == 3) |
| 742 |
< |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
| 742 |
> |
wsum += sumambient(acol, r, rn, al, |
| 743 |
> |
at->kid+i, ck0, s); |
| 744 |
|
} |
| 745 |
|
return(wsum); |
| 746 |
|
} |
| 747 |
|
|
| 748 |
|
|
| 749 |
< |
extern double |
| 750 |
< |
makeambient( /* make a new ambient value */ |
| 749 |
> |
static double |
| 750 |
> |
makeambient( /* make a new ambient value for storage */ |
| 751 |
|
COLOR acol, |
| 752 |
< |
register RAY *r, |
| 752 |
> |
RAY *r, |
| 753 |
|
FVECT rn, |
| 754 |
|
int al |
| 755 |
|
) |
| 756 |
|
{ |
| 757 |
|
AMBVAL amb; |
| 758 |
|
FVECT gp, gd; |
| 759 |
< |
/* compute weight */ |
| 760 |
< |
amb.weight = pow(AVGREFL, (double)al); |
| 761 |
< |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
| 762 |
< |
amb.weight = r->rweight; |
| 759 |
> |
int i; |
| 760 |
> |
|
| 761 |
> |
amb.weight = 1.0; /* compute weight */ |
| 762 |
> |
for (i = al; i-- > 0; ) |
| 763 |
> |
amb.weight *= AVGREFL; |
| 764 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
| 765 |
> |
amb.weight = 1.25*r->rweight; |
| 766 |
> |
setcolor(acol, AVGREFL, AVGREFL, AVGREFL); |
| 767 |
|
/* compute ambient */ |
| 768 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
| 769 |
< |
if (amb.rad <= FTINY) |
| 769 |
> |
if (amb.rad <= FTINY) { |
| 770 |
> |
setcolor(acol, 0.0, 0.0, 0.0); |
| 771 |
|
return(0.0); |
| 772 |
< |
/* store it */ |
| 772 |
> |
} |
| 773 |
> |
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
| 774 |
> |
/* store value */ |
| 775 |
|
VCOPY(amb.pos, r->rop); |
| 776 |
|
VCOPY(amb.dir, r->ron); |
| 777 |
|
amb.lvl = al; |
| 786 |
|
} |
| 787 |
|
|
| 788 |
|
|
| 789 |
< |
extern void |
| 789 |
> |
static void |
| 790 |
|
extambient( /* extrapolate value at pv, nv */ |
| 791 |
|
COLOR cr, |
| 792 |
< |
register AMBVAL *ap, |
| 792 |
> |
AMBVAL *ap, |
| 793 |
|
FVECT pv, |
| 794 |
|
FVECT nv |
| 795 |
|
) |
| 796 |
|
{ |
| 797 |
|
FVECT v1; |
| 798 |
< |
register int i; |
| 798 |
> |
int i; |
| 799 |
|
double d; |
| 800 |
|
|
| 801 |
|
d = 1.0; /* zeroeth order */ |
| 815 |
|
|
| 816 |
|
|
| 817 |
|
static void |
| 818 |
+ |
avinsert( /* insert ambient value in our tree */ |
| 819 |
+ |
AMBVAL *av |
| 820 |
+ |
) |
| 821 |
+ |
{ |
| 822 |
+ |
AMBTREE *at; |
| 823 |
+ |
AMBVAL *ap; |
| 824 |
+ |
AMBVAL avh; |
| 825 |
+ |
FVECT ck0; |
| 826 |
+ |
double s; |
| 827 |
+ |
int branch; |
| 828 |
+ |
int i; |
| 829 |
+ |
|
| 830 |
+ |
if (av->rad <= FTINY) |
| 831 |
+ |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 832 |
+ |
at = &atrunk; |
| 833 |
+ |
VCOPY(ck0, thescene.cuorg); |
| 834 |
+ |
s = thescene.cusize; |
| 835 |
+ |
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
| 836 |
+ |
if (at->kid == NULL) |
| 837 |
+ |
if ((at->kid = newambtree()) == NULL) |
| 838 |
+ |
error(SYSTEM, "out of memory in avinsert"); |
| 839 |
+ |
s *= 0.5; |
| 840 |
+ |
branch = 0; |
| 841 |
+ |
for (i = 0; i < 3; i++) |
| 842 |
+ |
if (av->pos[i] > ck0[i] + s) { |
| 843 |
+ |
ck0[i] += s; |
| 844 |
+ |
branch |= 1 << i; |
| 845 |
+ |
} |
| 846 |
+ |
at = at->kid + branch; |
| 847 |
+ |
} |
| 848 |
+ |
avh.next = at->alist; /* order by increasing level */ |
| 849 |
+ |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 850 |
+ |
if (ap->next->lvl >= av->lvl) |
| 851 |
+ |
break; |
| 852 |
+ |
av->next = ap->next; |
| 853 |
+ |
ap->next = (AMBVAL*)av; |
| 854 |
+ |
at->alist = avh.next; |
| 855 |
+ |
} |
| 856 |
+ |
|
| 857 |
+ |
#endif /* ! NEWAMB */ |
| 858 |
+ |
|
| 859 |
+ |
/************* FOLLOWING ROUTINES SAME FOR NEW & OLD METHODS ***************/ |
| 860 |
+ |
|
| 861 |
+ |
static void |
| 862 |
|
initambfile( /* initialize ambient file */ |
| 863 |
< |
int creat |
| 863 |
> |
int cre8 |
| 864 |
|
) |
| 865 |
|
{ |
| 866 |
|
extern char *progname, *octname; |
| 867 |
|
static char *mybuf = NULL; |
| 868 |
|
|
| 869 |
|
#ifdef F_SETLKW |
| 870 |
< |
aflock(creat ? F_WRLCK : F_RDLCK); |
| 870 |
> |
aflock(cre8 ? F_WRLCK : F_RDLCK); |
| 871 |
|
#endif |
| 872 |
|
SET_FILE_BINARY(ambfp); |
| 873 |
|
if (mybuf == NULL) |
| 874 |
|
mybuf = (char *)bmalloc(BUFSIZ+8); |
| 875 |
|
setbuf(ambfp, mybuf); |
| 876 |
< |
if (creat) { /* new file */ |
| 876 |
> |
if (cre8) { /* new file */ |
| 877 |
|
newheader("RADIANCE", ambfp); |
| 878 |
|
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
| 879 |
|
progname, colval(ambval,RED), |
| 882 |
|
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
| 883 |
|
ambdiv, ambssamp, ambres); |
| 884 |
|
if (octname != NULL) |
| 885 |
< |
printargs(1, &octname, ambfp); |
| 886 |
< |
else |
| 518 |
< |
fputc('\n', ambfp); |
| 885 |
> |
fputs(octname, ambfp); |
| 886 |
> |
fputc('\n', ambfp); |
| 887 |
|
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
| 888 |
|
fputnow(ambfp); |
| 889 |
|
fputformat(AMBFMT, ambfp); |
| 890 |
< |
putc('\n', ambfp); |
| 890 |
> |
fputc('\n', ambfp); |
| 891 |
|
putambmagic(ambfp); |
| 892 |
|
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
| 893 |
|
error(USER, "bad ambient file"); |
| 915 |
|
|
| 916 |
|
static AMBVAL * |
| 917 |
|
avstore( /* allocate memory and store aval */ |
| 918 |
< |
register AMBVAL *aval |
| 918 |
> |
AMBVAL *aval |
| 919 |
|
) |
| 920 |
|
{ |
| 921 |
< |
register AMBVAL *av; |
| 921 |
> |
AMBVAL *av; |
| 922 |
|
double d; |
| 923 |
|
|
| 924 |
|
if ((av = newambval()) == NULL) |
| 944 |
|
static AMBTREE * |
| 945 |
|
newambtree(void) /* allocate 8 ambient tree structs */ |
| 946 |
|
{ |
| 947 |
< |
register AMBTREE *atp, *upperlim; |
| 947 |
> |
AMBTREE *atp, *upperlim; |
| 948 |
|
|
| 949 |
|
if (atfreelist == NULL) { /* get more nodes */ |
| 950 |
|
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
| 974 |
|
|
| 975 |
|
|
| 976 |
|
static void |
| 609 |
– |
avinsert( /* insert ambient value in our tree */ |
| 610 |
– |
void *av |
| 611 |
– |
) |
| 612 |
– |
{ |
| 613 |
– |
register AMBTREE *at; |
| 614 |
– |
register AMBVAL *ap; |
| 615 |
– |
AMBVAL avh; |
| 616 |
– |
FVECT ck0; |
| 617 |
– |
double s; |
| 618 |
– |
int branch; |
| 619 |
– |
register int i; |
| 620 |
– |
|
| 621 |
– |
if (((AMBVAL*)av)->rad <= FTINY) |
| 622 |
– |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 623 |
– |
at = &atrunk; |
| 624 |
– |
VCOPY(ck0, thescene.cuorg); |
| 625 |
– |
s = thescene.cusize; |
| 626 |
– |
while (s*(OCTSCALE/2) > ((AMBVAL*)av)->rad*ambacc) { |
| 627 |
– |
if (at->kid == NULL) |
| 628 |
– |
if ((at->kid = newambtree()) == NULL) |
| 629 |
– |
error(SYSTEM, "out of memory in avinsert"); |
| 630 |
– |
s *= 0.5; |
| 631 |
– |
branch = 0; |
| 632 |
– |
for (i = 0; i < 3; i++) |
| 633 |
– |
if (((AMBVAL*)av)->pos[i] > ck0[i] + s) { |
| 634 |
– |
ck0[i] += s; |
| 635 |
– |
branch |= 1 << i; |
| 636 |
– |
} |
| 637 |
– |
at = at->kid + branch; |
| 638 |
– |
} |
| 639 |
– |
avh.next = at->alist; /* order by increasing level */ |
| 640 |
– |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 641 |
– |
if (ap->next->lvl >= ((AMBVAL*)av)->lvl) |
| 642 |
– |
break; |
| 643 |
– |
((AMBVAL*)av)->next = ap->next; |
| 644 |
– |
ap->next = (AMBVAL*)av; |
| 645 |
– |
at->alist = avh.next; |
| 646 |
– |
} |
| 647 |
– |
|
| 648 |
– |
|
| 649 |
– |
static void |
| 977 |
|
unloadatree( /* unload an ambient value tree */ |
| 978 |
< |
register AMBTREE *at, |
| 978 |
> |
AMBTREE *at, |
| 979 |
|
unloadtf_t *f |
| 980 |
|
) |
| 981 |
|
{ |
| 982 |
< |
register AMBVAL *av; |
| 983 |
< |
register int i; |
| 982 |
> |
AMBVAL *av; |
| 983 |
> |
int i; |
| 984 |
|
/* transfer values at this node */ |
| 985 |
|
for (av = at->alist; av != NULL; av = at->alist) { |
| 986 |
|
at->alist = av->next; |
| 1005 |
|
static int alatcmp(const void *av1, const void *av2); |
| 1006 |
|
|
| 1007 |
|
static void |
| 1008 |
+ |
avfree(AMBVAL *av) |
| 1009 |
+ |
{ |
| 1010 |
+ |
free(av); |
| 1011 |
+ |
} |
| 1012 |
+ |
|
| 1013 |
+ |
static void |
| 1014 |
|
av2list( |
| 1015 |
< |
void *av |
| 1015 |
> |
AMBVAL *av |
| 1016 |
|
) |
| 1017 |
|
{ |
| 1018 |
|
#ifdef DEBUG |
| 1020 |
|
error(CONSISTENCY, "too many ambient values in av2list1"); |
| 1021 |
|
#endif |
| 1022 |
|
avlist1[i_avlist].p = avlist2[i_avlist] = (AMBVAL*)av; |
| 1023 |
< |
avlist1[i_avlist++].t = ((AMBVAL*)av)->latick; |
| 1023 |
> |
avlist1[i_avlist++].t = av->latick; |
| 1024 |
|
} |
| 1025 |
|
|
| 1026 |
|
|
| 1030 |
|
const void *av2 |
| 1031 |
|
) |
| 1032 |
|
{ |
| 1033 |
< |
register long lc = ((struct avl *)av2)->t - ((struct avl *)av1)->t; |
| 1033 |
> |
long lc = ((struct avl *)av2)->t - ((struct avl *)av1)->t; |
| 1034 |
|
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
| 1035 |
|
} |
| 1036 |
|
|
| 1047 |
|
const void *avp2 |
| 1048 |
|
) |
| 1049 |
|
{ |
| 1050 |
< |
register long diff = *(char * const *)avp1 - *(char * const *)avp2; |
| 1050 |
> |
long diff = *(char * const *)avp1 - *(char * const *)avp2; |
| 1051 |
|
if (diff < 0) |
| 1052 |
|
return(-1); |
| 1053 |
|
return(diff > 0); |
| 1054 |
|
} |
| 1055 |
|
|
| 1056 |
< |
#if 1 |
| 1056 |
> |
|
| 1057 |
|
static int |
| 1058 |
|
avlmemi( /* find list position from address */ |
| 1059 |
|
AMBVAL *avaddr |
| 1060 |
|
) |
| 1061 |
|
{ |
| 1062 |
< |
register AMBVAL **avlpp; |
| 1062 |
> |
AMBVAL **avlpp; |
| 1063 |
|
|
| 1064 |
|
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
| 1065 |
< |
nambvals, sizeof(AMBVAL *), aposcmp); |
| 1065 |
> |
nambvals, sizeof(AMBVAL *), &aposcmp); |
| 1066 |
|
if (avlpp == NULL) |
| 1067 |
|
error(CONSISTENCY, "address not found in avlmemi"); |
| 1068 |
|
return(avlpp - avlist2); |
| 1069 |
|
} |
| 737 |
– |
#else |
| 738 |
– |
#define avlmemi(avaddr) ((AMBVAL **)bsearch((char *)&avaddr,(char *)avlist2, \ |
| 739 |
– |
nambvals,sizeof(AMBVAL *),aposcmp) - avlist2) |
| 740 |
– |
#endif |
| 1070 |
|
|
| 1071 |
|
|
| 1072 |
|
static void |
| 1076 |
|
{ |
| 1077 |
|
AMBTREE oldatrunk; |
| 1078 |
|
AMBVAL tav, *tap, *pnext; |
| 1079 |
< |
register int i, j; |
| 1079 |
> |
int i, j; |
| 1080 |
|
/* see if it's time yet */ |
| 1081 |
|
if (!always && (ambclock++ < lastsort+sortintvl || |
| 1082 |
|
nambvals < SORT_THRESH)) |
| 1110 |
|
oldatrunk = atrunk; |
| 1111 |
|
atrunk.alist = NULL; |
| 1112 |
|
atrunk.kid = NULL; |
| 1113 |
< |
unloadatree(&oldatrunk, avinsert); |
| 1113 |
> |
unloadatree(&oldatrunk, &avinsert); |
| 1114 |
|
} |
| 1115 |
|
} else { /* sort memory by last access time */ |
| 1116 |
|
/* |
| 1127 |
|
eputs(errmsg); |
| 1128 |
|
#endif |
| 1129 |
|
i_avlist = 0; |
| 1130 |
< |
unloadatree(&atrunk, av2list); /* empty current tree */ |
| 1130 |
> |
unloadatree(&atrunk, &av2list); /* empty current tree */ |
| 1131 |
|
#ifdef DEBUG |
| 1132 |
|
if (i_avlist < nambvals) |
| 1133 |
|
error(CONSISTENCY, "missing ambient values in sortambvals"); |
| 1134 |
|
#endif |
| 1135 |
< |
qsort((char *)avlist1, nambvals, sizeof(struct avl), alatcmp); |
| 1136 |
< |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
| 1135 |
> |
qsort((char *)avlist1, nambvals, sizeof(struct avl), &alatcmp); |
| 1136 |
> |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), &aposcmp); |
| 1137 |
|
for (i = 0; i < nambvals; i++) { |
| 1138 |
|
if (avlist1[i].p == NULL) |
| 1139 |
|
continue; |
| 1176 |
|
{ |
| 1177 |
|
static struct flock fls; /* static so initialized to zeroes */ |
| 1178 |
|
|
| 1179 |
+ |
if (typ == fls.l_type) /* already called? */ |
| 1180 |
+ |
return; |
| 1181 |
|
fls.l_type = typ; |
| 1182 |
|
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
| 1183 |
|
error(SYSTEM, "cannot (un)lock ambient file"); |
| 1184 |
|
} |
| 1185 |
|
|
| 1186 |
|
|
| 1187 |
< |
extern int |
| 1187 |
> |
int |
| 1188 |
|
ambsync(void) /* synchronize ambient file */ |
| 1189 |
|
{ |
| 1190 |
|
long flen; |
| 1191 |
|
AMBVAL avs; |
| 1192 |
< |
register int n; |
| 1192 |
> |
int n; |
| 1193 |
|
|
| 1194 |
< |
if (nunflshed == 0) |
| 1194 |
> |
if (ambfp == NULL) /* no ambient file? */ |
| 1195 |
|
return(0); |
| 1196 |
< |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
| 1197 |
< |
goto syncend; |
| 867 |
< |
/* gain exclusive access */ |
| 868 |
< |
aflock(F_WRLCK); |
| 1196 |
> |
/* gain appropriate access */ |
| 1197 |
> |
aflock(nunflshed ? F_WRLCK : F_RDLCK); |
| 1198 |
|
/* see if file has grown */ |
| 1199 |
|
if ((flen = lseek(fileno(ambfp), (off_t)0, SEEK_END)) < 0) |
| 1200 |
|
goto seekerr; |
| 1201 |
< |
if ( (n = flen - lastpos) ) { /* file has grown */ |
| 1201 |
> |
if ((n = flen - lastpos) > 0) { /* file has grown */ |
| 1202 |
|
if (ambinp == NULL) { /* use duplicate filedes */ |
| 1203 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
| 1204 |
|
if (ambinp == NULL) |
| 1205 |
|
error(SYSTEM, "fdopen failed in ambsync"); |
| 1206 |
|
} |
| 1207 |
< |
if (fseek(ambinp, lastpos, 0) < 0) |
| 1207 |
> |
if (fseek(ambinp, lastpos, SEEK_SET) < 0) |
| 1208 |
|
goto seekerr; |
| 1209 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
| 1210 |
|
if (!readambval(&avs, ambinp)) { |
| 1217 |
|
avinsert(avstore(&avs)); |
| 1218 |
|
n -= AMBVALSIZ; |
| 1219 |
|
} |
| 1220 |
+ |
lastpos = flen - n; |
| 1221 |
|
/*** seek always as safety measure |
| 1222 |
|
if (n) ***/ /* alignment */ |
| 1223 |
< |
if (lseek(fileno(ambfp), (off_t)(flen-n), SEEK_SET) < 0) |
| 1223 |
> |
if (lseek(fileno(ambfp), (off_t)lastpos, SEEK_SET) < 0) |
| 1224 |
|
goto seekerr; |
| 1225 |
|
} |
| 896 |
– |
#ifdef DEBUG |
| 897 |
– |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
| 898 |
– |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
| 899 |
– |
ambfp->_ptr - ambfp->_base, |
| 900 |
– |
nunflshed*AMBVALSIZ); |
| 901 |
– |
error(CONSISTENCY, errmsg); |
| 902 |
– |
} |
| 903 |
– |
#endif |
| 904 |
– |
syncend: |
| 1226 |
|
n = fflush(ambfp); /* calls write() at last */ |
| 1227 |
< |
if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
| 1227 |
> |
if (n != EOF) |
| 1228 |
> |
lastpos += (long)nunflshed*AMBVALSIZ; |
| 1229 |
> |
else if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
| 1230 |
|
goto seekerr; |
| 1231 |
+ |
|
| 1232 |
|
aflock(F_UNLCK); /* release file */ |
| 1233 |
|
nunflshed = 0; |
| 1234 |
|
return(n); |
| 1237 |
|
return -1; /* pro forma return */ |
| 1238 |
|
} |
| 1239 |
|
|
| 1240 |
< |
#else |
| 1240 |
> |
#else /* ! F_SETLKW */ |
| 1241 |
|
|
| 1242 |
< |
extern int |
| 1242 |
> |
int |
| 1243 |
|
ambsync(void) /* flush ambient file */ |
| 1244 |
|
{ |
| 1245 |
< |
if (nunflshed == 0) |
| 1245 |
> |
if (ambfp == NULL) |
| 1246 |
|
return(0); |
| 1247 |
|
nunflshed = 0; |
| 1248 |
|
return(fflush(ambfp)); |
| 1249 |
|
} |
| 1250 |
|
|
| 1251 |
< |
#endif |
| 1251 |
> |
#endif /* ! F_SETLKW */ |
