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root/radiance/ray/src/util/rpiece.c
Revision: 2.37
Committed: Sat Feb 22 02:07:30 2003 UTC (21 years, 1 month ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R5
Changes since 2.36: +13 -18 lines
Log Message:
Changes and check-in for 3.5 release
Includes new source files and modifications not recorded for many years
See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release

File Contents

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