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root/radiance/ray/src/util/rpiece.c
Revision: 2.32
Committed: Thu Nov 30 14:21:48 1995 UTC (28 years, 4 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.31: +9 -4 lines
Log Message:
added VT_CYL view type to rpiece() routine

File Contents

# Content
1 /* Copyright (c) 1995 Regents of the University of California */
2
3 #ifndef lint
4 static char SCCSid[] = "$SunId$ LBL";
5 #endif
6
7 /*
8 * Generate sections of a picture.
9 */
10
11 #include "standard.h"
12
13 #ifndef F_SETLKW
14
15 main(argc, argv)
16 int argc;
17 char *argv[];
18 {
19 fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
20 exit(1);
21 }
22
23 #else
24
25 #include <signal.h>
26 #include "color.h"
27 #include "view.h"
28 #include "resolu.h"
29
30 #ifndef NFS
31 #define NFS 1
32 #endif
33 /* set the following to 0 to forgo forking */
34 #ifndef MAXFORK
35 #if NFS
36 #define MAXFORK 3 /* allotment of duped processes */
37 #else
38 #define MAXFORK 0
39 #endif
40 #endif
41 /* protection from SYSV signals(!) */
42 #if defined(sgi)
43 #define guard_io() sighold(SIGALRM)
44 #define unguard() sigrelse(SIGALRM)
45 #endif
46 #ifndef guard_io
47 #define guard_io() 0
48 #define unguard() 0
49 #endif
50 /* rpict command */
51 char *rpargv[128] = {"rpict", "-S", "1"};
52 int rpargc = 3;
53 int rpd[3];
54 FILE *torp, *fromrp;
55 COLR *pbuf;
56 /* our view parameters */
57 VIEW ourview = STDVIEW;
58 double pixaspect = 1.0;
59 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
60 /* output file */
61 char *outfile = NULL;
62 int outfd;
63 long scanorig;
64 FILE *syncfp = NULL; /* synchronization file pointer */
65 int synclst = F_UNLCK; /* synchronization file lock status */
66 int nforked = 0;
67
68 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
69
70 char *progname;
71 int verbose = 0;
72 unsigned timelim = 0;
73 int rvrlim = -1;
74
75 extern long lseek(), ftell();
76
77 int gotalrm = 0;
78 int onalrm() { gotalrm++; }
79
80
81 main(argc, argv)
82 int argc;
83 char *argv[];
84 {
85 register int i, rval;
86
87 progname = argv[0];
88 for (i = 1; i < argc; i++) {
89 /* expand arguments */
90 while (rval = expandarg(&argc, &argv, i))
91 if (rval < 0) {
92 fprintf(stderr, "%s: cannot expand '%s'",
93 argv[0], argv[i]);
94 exit(1);
95 }
96 if (argv[i][0] == '-')
97 switch (argv[i][1]) {
98 case 'v':
99 switch (argv[i][2]) {
100 case '\0': /* verbose option */
101 verbose = !verbose;
102 continue;
103 case 'f': /* view file */
104 if (viewfile(argv[++i], &ourview, NULL) <= 0) {
105 fprintf(stderr,
106 "%s: not a view file\n", argv[i]);
107 exit(1);
108 }
109 continue;
110 default: /* view option? */
111 rval = getviewopt(&ourview, argc-i, argv+i);
112 if (rval >= 0) {
113 i += rval;
114 continue;
115 }
116 break;
117 }
118 break;
119 case 'p': /* pixel aspect ratio? */
120 if (argv[i][2] != 'a' || argv[i][3])
121 break;
122 pixaspect = atof(argv[i+1]);
123 continue;
124 case 'T': /* time limit (hours) */
125 if (argv[i][2])
126 break;
127 timelim = atof(argv[++i])*3600. + .5;
128 break;
129 case 'x': /* overall x resolution */
130 if (argv[i][2])
131 break;
132 hres = atoi(argv[++i]);
133 continue;
134 case 'y': /* overall y resolution */
135 if (argv[i][2])
136 break;
137 vres = atoi(argv[++i]);
138 continue;
139 case 'X': /* horizontal multiplier */
140 if (argv[i][2])
141 break;
142 hmult = atoi(argv[++i]);
143 continue;
144 case 'Y': /* vertical multiplier */
145 if (argv[i][2])
146 break;
147 vmult = atoi(argv[++i]);
148 continue;
149 case 'R': /* recover */
150 if (argv[i][2])
151 break;
152 rvrlim = 0;
153 /* fall through */
154 case 'F': /* syncronization file */
155 if (argv[i][2])
156 break;
157 if ((syncfp =
158 fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
159 fprintf(stderr, "%s: cannot open\n",
160 argv[i]);
161 exit(1);
162 }
163 continue;
164 case 'z': /* z-file ist verbotten */
165 fprintf(stderr, "%s: -z option not allowed\n",
166 argv[0]);
167 exit(1);
168 case 'o': /* output file */
169 if (argv[i][2])
170 break;
171 outfile = argv[++i];
172 continue;
173 } else if (i >= argc-1)
174 break;
175 rpargv[rpargc++] = argv[i];
176 }
177 if (i >= argc) {
178 fprintf(stderr, "%s: missing octree argument\n", argv[0]);
179 exit(1);
180 }
181 if (outfile == NULL) {
182 fprintf(stderr, "%s: missing output file\n", argv[0]);
183 exit(1);
184 }
185 init(argc, argv);
186 rpiece();
187 exit(cleanup(0));
188 }
189
190
191 dolock(fd, ltyp) /* lock or unlock a file */
192 int fd;
193 int ltyp;
194 {
195 static struct flock fls; /* static so initialized to zeroes */
196 extern char *sys_errlist[];
197
198 fls.l_type = ltyp;
199 if (fcntl(fd, F_SETLKW, &fls) < 0) {
200 fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
201 progname, sys_errlist[errno]);
202 exit(1);
203 }
204 }
205
206
207 init(ac, av) /* set up output file and start rpict */
208 int ac;
209 char **av;
210 {
211 static char hrbuf[16], vrbuf[16];
212 extern char VersionID[];
213 char *err;
214 FILE *fp;
215 int hr, vr;
216 /* set up view */
217 if ((err = setview(&ourview)) != NULL) {
218 fprintf(stderr, "%s: %s\n", progname, err);
219 exit(1);
220 }
221 if (syncfp != NULL) {
222 sflock(F_RDLCK);
223 fscanf(syncfp, "%d %d", &hmult, &vmult);
224 sflock(F_UNLCK);
225 }
226 /* compute piece size */
227 hres /= hmult;
228 vres /= vmult;
229 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
230 sprintf(hrbuf, "%d", hres);
231 rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
232 sprintf(vrbuf, "%d", vres);
233 rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
234 rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
235 rpargv[rpargc++] = av[ac-1];
236 rpargv[rpargc] = NULL;
237 /* open output file */
238 if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
239 dolock(outfd, F_WRLCK);
240 if ((fp = fdopen(dup(outfd), "w")) == NULL)
241 goto filerr;
242 newheader("RADIANCE", fp); /* create header */
243 printargs(ac, av, fp);
244 fprintf(fp, "SOFTWARE= %s\n", VersionID);
245 fputs(VIEWSTR, fp);
246 fprintview(&ourview, fp);
247 putc('\n', fp);
248 if (pixaspect < .99 || pixaspect > 1.01)
249 fputaspect(pixaspect, fp);
250 fputformat(COLRFMT, fp);
251 putc('\n', fp);
252 fprtresolu(hres*hmult, vres*vmult, fp);
253 } else if ((outfd = open(outfile, O_RDWR)) >= 0) {
254 dolock(outfd, F_RDLCK);
255 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
256 goto filerr;
257 getheader(fp, NULL, NULL); /* skip header */
258 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
259 hr != hres*hmult || vr != vres*vmult) {
260 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
261 progname, outfile);
262 exit(1);
263 }
264 } else {
265 fprintf(stderr, "%s: cannot open file \"%s\"\n",
266 progname, outfile);
267 exit(1);
268 }
269 scanorig = ftell(fp); /* record position of first scanline */
270 if (fclose(fp) == -1) /* done with stream i/o */
271 goto filerr;
272 dolock(outfd, F_UNLCK);
273 /* start rpict process */
274 if (open_process(rpd, rpargv) <= 0) {
275 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
276 exit(1);
277 }
278 if ((fromrp = fdopen(rpd[0], "r")) == NULL ||
279 (torp = fdopen(rpd[1], "w")) == NULL) {
280 fprintf(stderr, "%s: cannot open stream to %s\n",
281 progname, rpargv[0]);
282 exit(1);
283 }
284 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
285 fprintf(stderr, "%s: out of memory\n", progname);
286 exit(1);
287 }
288 signal(SIGALRM, onalrm);
289 if (timelim)
290 alarm(timelim);
291 return;
292 filerr:
293 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
294 exit(1);
295 }
296
297
298 int
299 nextpiece(xp, yp) /* get next piece assignment */
300 int *xp, *yp;
301 {
302 if (gotalrm) /* someone wants us to quit */
303 return(0);
304 if (syncfp != NULL) { /* use sync file */
305 /*
306 * So we don't necessarily have to lock and unlock the file
307 * multiple times (very slow), we establish an exclusive
308 * lock at the beginning on our synchronization file and
309 * maintain it in the subroutine rvrpiece().
310 */
311 sflock(F_WRLCK);
312 fseek(syncfp, 0L, 0); /* read position */
313 if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) {
314 *xp = hmult-1;
315 *yp = vmult;
316 }
317 if (rvrlim == 0) /* initialize recovery limit */
318 rvrlim = *xp*vmult + *yp;
319 if (rvrpiece(xp, yp)) { /* do stragglers first */
320 sflock(F_UNLCK);
321 return(1);
322 }
323 if (--(*yp) < 0) { /* decrement position */
324 *yp = vmult-1;
325 if (--(*xp) < 0) { /* all done */
326 sflock(F_UNLCK);
327 return(0);
328 }
329 }
330 fseek(syncfp, 0L, 0); /* write new position */
331 fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp);
332 fflush(syncfp);
333 sflock(F_UNLCK); /* release sync file */
334 return(1);
335 }
336 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
337 }
338
339
340 int
341 rvrpiece(xp, yp) /* check for recoverable pieces */
342 register int *xp, *yp;
343 {
344 static char *pdone = NULL; /* which pieces are done */
345 static long readpos = -1; /* how far we've read */
346 register int i;
347 /*
348 * This routine is called by nextpiece() with an
349 * exclusive lock on syncfp and the file pointer at the
350 * appropriate position to read in the finished pieces.
351 */
352 if (rvrlim < 0)
353 return(0); /* only check if asked */
354 if (pdone == NULL) /* first call */
355 pdone = calloc(hmult*vmult, sizeof(char));
356 if (pdone == NULL) {
357 fprintf(stderr, "%s: out of memory\n", progname);
358 exit(1);
359 }
360 if (readpos != -1) /* mark what's been done */
361 fseek(syncfp, readpos, 0);
362 while (fscanf(syncfp, "%d %d", xp, yp) == 2)
363 pdone[*xp*vmult+*yp] = 1;
364 if (!feof(syncfp)) {
365 fprintf(stderr, "%s: format error in sync file\n", progname);
366 exit(1);
367 }
368 readpos = ftell(syncfp);
369 i = hmult*vmult; /* find an unaccounted for piece */
370 while (i-- > rvrlim)
371 if (!pdone[i]) {
372 *xp = i / vmult;
373 *yp = i % vmult;
374 pdone[i] = 1; /* consider it done */
375 return(1);
376 }
377 rvrlim = -1; /* nothing left to recover */
378 free(pdone);
379 pdone = NULL;
380 return(0);
381 }
382
383
384 int
385 cleanup(rstat) /* close rpict process and clean up */
386 int rstat;
387 {
388 int status;
389
390 bfree((char *)pbuf, hres*vres*sizeof(COLR));
391 fclose(torp);
392 fclose(fromrp);
393 while (wait(&status) != -1)
394 if (rstat == 0)
395 rstat = status>>8 & 0xff;
396 return(rstat);
397 }
398
399
400 rpiece() /* render picture piece by piece */
401 {
402 VIEW pview;
403 int xorg, yorg;
404 /* compute view parameters */
405 copystruct(&pview, &ourview);
406 switch (ourview.type) {
407 case VT_PER:
408 pview.horiz = 2.*180./PI*atan(
409 tan(PI/180./2.*ourview.horiz)/hmult );
410 pview.vert = 2.*180./PI*atan(
411 tan(PI/180./2.*ourview.vert)/vmult );
412 break;
413 case VT_PAR:
414 case VT_ANG:
415 pview.horiz = ourview.horiz / hmult;
416 pview.vert = ourview.vert / vmult;
417 break;
418 case VT_CYL:
419 pview.horiz = ourview.horiz / hmult;
420 pview.vert = 2.*180./PI*atan(
421 tan(PI/180./2.*ourview.vert)/vmult );
422 break;
423 case VT_HEM:
424 pview.horiz = 2.*180./PI*asin(
425 sin(PI/180./2.*ourview.horiz)/hmult );
426 pview.vert = 2.*180./PI*asin(
427 sin(PI/180./2.*ourview.vert)/vmult );
428 break;
429 default:
430 fprintf(stderr, "%s: unknown view type '-vt%c'\n",
431 progname, ourview.type);
432 exit(cleanup(1));
433 }
434 /* render each piece */
435 while (nextpiece(&xorg, &yorg)) {
436 pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1);
437 pview.voff = ourview.voff + yorg - 0.5*(vmult-1);
438 fputs(VIEWSTR, torp);
439 fprintview(&pview, torp);
440 putc('\n', torp);
441 fflush(torp); /* assigns piece to rpict */
442 putpiece(xorg, yorg); /* place piece in output */
443 }
444 }
445
446
447 int
448 putpiece(xpos, ypos) /* get next piece from rpict */
449 int xpos, ypos;
450 {
451 struct flock fls;
452 int pid, status;
453 int hr, vr;
454 register int y;
455 /* check bounds */
456 if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) {
457 fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
458 progname, xpos, ypos);
459 exit(cleanup(1));
460 }
461 /* check header from rpict */
462 guard_io();
463 getheader(fromrp, NULL, NULL);
464 if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) {
465 fprintf(stderr, "%s: resolution mismatch from %s\n",
466 progname, rpargv[0]);
467 exit(cleanup(1));
468 }
469 if (verbose) { /* notify caller */
470 printf("%d %d begun\n", xpos, ypos);
471 fflush(stdout);
472 }
473 unguard();
474 /* load new piece into buffer */
475 for (y = 0; y < vr; y++) {
476 guard_io();
477 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
478 fprintf(stderr, "%s: read error from %s\n",
479 progname, rpargv[0]);
480 exit(cleanup(1));
481 }
482 unguard();
483 }
484 #if MAXFORK
485 /* fork so we don't slow rpict down */
486 if ((pid = fork()) > 0) {
487 if (++nforked >= MAXFORK) {
488 wait(&status); /* reap a child */
489 if (status)
490 exit(cleanup(status>>8 & 0xff));
491 nforked--;
492 }
493 return(pid);
494 }
495 #else
496 pid = -1; /* no forking */
497 #endif
498 fls.l_start = scanorig +
499 ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
500 #if NFS
501 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
502 /* lock file section so NFS doesn't mess up */
503 fls.l_whence = 0;
504 fls.l_type = F_WRLCK;
505 if (fcntl(outfd, F_SETLKW, &fls) < 0)
506 filerr("lock");
507 #endif
508 /* write new piece to file */
509 if (lseek(outfd, fls.l_start, 0) == -1)
510 filerr("seek");
511 if (hmult == 1) {
512 if (writebuf(outfd, (char *)pbuf,
513 vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
514 filerr("write");
515 } else
516 for (y = 0; y < vr; y++) {
517 if (writebuf(outfd, (char *)(pbuf+y*hr),
518 hr*sizeof(COLR)) != hr*sizeof(COLR))
519 filerr("write");
520 if (y < vr-1 && lseek(outfd,
521 (long)(hmult-1)*hr*sizeof(COLR),
522 1) == -1)
523 filerr("seek");
524 }
525 #if NFS
526 fls.l_type = F_UNLCK; /* release lock */
527 if (fcntl(outfd, F_SETLKW, &fls) < 0)
528 filerr("lock");
529 #endif
530 if (verbose) { /* notify caller */
531 printf("%d %d done\n", xpos, ypos);
532 fflush(stdout);
533 }
534 if (syncfp != NULL) { /* record what's been done */
535 sflock(F_WRLCK);
536 fseek(syncfp, 0L, 2); /* append index */
537 fprintf(syncfp, "%4d %4d\n", xpos, ypos);
538 fflush(syncfp);
539 /*** Unlock not necessary, since
540 sflock(F_UNLCK); _exit() or nextpiece() is next ***/
541 }
542 if (pid == -1) /* didn't fork or fork failed */
543 return(0);
544 _exit(0); /* else exit child process (releasing locks) */
545 }
546
547
548 filerr(t) /* report file error and exit */
549 char *t;
550 {
551 extern char *sys_errlist[];
552
553 fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
554 progname, t, outfile, sys_errlist[errno]);
555 _exit(1);
556 }
557
558 #endif