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root/radiance/ray/src/util/rpiece.c
Revision: 2.48
Committed: Tue Mar 11 02:21:47 2008 UTC (16 years ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.47: +23 -11 lines
Log Message:
Added planisphere view type (-vts option) as requested by Axel Jacobs

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: rpiece.c,v 2.47 2007/08/22 18:46:36 greg Exp $";
3 #endif
4 /*
5 * Generate sections of a picture.
6 */
7
8
9 #include <stdio.h>
10 #include <signal.h>
11 #include <sys/types.h>
12 #ifndef NON_POSIX /* XXX need abstraction for process management */
13 #include <sys/wait.h>
14 #endif
15
16 #include "platform.h"
17 #include "standard.h"
18 #include "color.h"
19 #include "view.h"
20 #include "rtprocess.h"
21
22 #ifndef F_SETLKW
23
24 int
25 main(
26 int argc,
27 char *argv[]
28 )
29 {
30 fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
31 exit(1);
32 }
33
34 #else
35
36 #ifndef NFS
37 #define NFS 1
38 #endif
39 /* set the following to 0 to forgo forking */
40 #ifndef MAXFORK
41 #if NFS
42 #define MAXFORK 3 /* allotment of duped processes */
43 #else
44 #define MAXFORK 0
45 #endif
46 #endif
47 /* protection from SYSV signals(!) */
48 #if defined(sgi)
49 #define guard_io() sighold(SIGALRM)
50 #define unguard() sigrelse(SIGALRM)
51 #endif
52 #ifndef guard_io
53 #define guard_io()
54 #define unguard()
55 #endif
56
57 extern char *strerror();
58
59 /* rpict command */
60 char *rpargv[128] = {"rpict", "-S", "1"};
61 int rpargc = 3;
62 FILE *torp, *fromrp;
63 COLR *pbuf;
64 /* our view parameters */
65 VIEW ourview = STDVIEW;
66 double pixaspect = 1.0;
67 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
68 /* output file */
69 char *outfile = NULL;
70 int outfd;
71 long scanorig;
72 FILE *syncfp = NULL; /* synchronization file pointer */
73 int synclst = F_UNLCK; /* synchronization file lock status */
74 int nforked = 0;
75
76 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
77
78 char *progname;
79 int verbose = 0;
80 unsigned timelim = 0;
81 int rvrlim = -1;
82
83 int gotalrm = 0;
84 void onalrm(int i) { gotalrm++; }
85
86 static void dolock(int fd, int ltyp);
87 static void init(int ac, char **av);
88 static int nextpiece(int *xp, int *yp);
89 static int rvrpiece(int *xp, int *yp);
90 static int cleanup(int rstat);
91 static void rpiece(void);
92 static int putpiece(int xpos, int ypos);
93 static void filerr(char *t);
94
95
96 int
97 main(
98 int argc,
99 char *argv[]
100 )
101 {
102 register int i, rval;
103
104 progname = argv[0];
105 for (i = 1; i < argc; i++) {
106 /* expand arguments */
107 while ((rval = expandarg(&argc, &argv, i)) > 0)
108 ;
109 if (rval < 0) {
110 fprintf(stderr, "%s: cannot expand '%s'",
111 argv[0], argv[i]);
112 exit(1);
113 }
114 if (argv[i][0] == '-')
115 switch (argv[i][1]) {
116 case 'v':
117 switch (argv[i][2]) {
118 case '\0': /* verbose option */
119 verbose = !verbose;
120 continue;
121 case 'f': /* view file */
122 if (viewfile(argv[++i], &ourview, NULL) <= 0) {
123 fprintf(stderr,
124 "%s: not a view file\n", argv[i]);
125 exit(1);
126 }
127 continue;
128 default: /* view option? */
129 rval = getviewopt(&ourview, argc-i, argv+i);
130 if (rval >= 0) {
131 i += rval;
132 continue;
133 }
134 break;
135 }
136 break;
137 case 'p': /* pixel aspect ratio? */
138 if (argv[i][2] != 'a' || argv[i][3])
139 break;
140 pixaspect = atof(argv[++i]);
141 continue;
142 case 'T': /* time limit (hours) */
143 if (argv[i][2])
144 break;
145 timelim = atof(argv[++i])*3600. + .5;
146 break;
147 case 'x': /* overall x resolution */
148 if (argv[i][2])
149 break;
150 hres = atoi(argv[++i]);
151 continue;
152 case 'y': /* overall y resolution */
153 if (argv[i][2])
154 break;
155 vres = atoi(argv[++i]);
156 continue;
157 case 'X': /* horizontal multiplier */
158 if (argv[i][2])
159 break;
160 hmult = atoi(argv[++i]);
161 continue;
162 case 'Y': /* vertical multiplier */
163 if (argv[i][2])
164 break;
165 vmult = atoi(argv[++i]);
166 continue;
167 case 'R': /* recover */
168 if (argv[i][2])
169 break;
170 rvrlim = 0;
171 /* fall through */
172 case 'F': /* syncronization file */
173 if (argv[i][2])
174 break;
175 if ((syncfp =
176 fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
177 fprintf(stderr, "%s: cannot open\n",
178 argv[i]);
179 exit(1);
180 }
181 continue;
182 case 'z': /* z-file ist verbotten */
183 fprintf(stderr, "%s: -z option not allowed\n",
184 argv[0]);
185 exit(1);
186 case 'o': /* output file */
187 if (argv[i][2])
188 break;
189 outfile = argv[++i];
190 continue;
191 } else if (i >= argc-1)
192 break;
193 rpargv[rpargc++] = argv[i];
194 }
195 if (i >= argc) {
196 fprintf(stderr, "%s: missing octree argument\n", argv[0]);
197 exit(1);
198 }
199 if (outfile == NULL) {
200 fprintf(stderr, "%s: missing output file\n", argv[0]);
201 exit(1);
202 }
203 init(argc, argv);
204 rpiece();
205 exit(cleanup(0));
206 }
207
208
209 static void
210 dolock( /* lock or unlock a file */
211 int fd,
212 int ltyp
213 )
214 {
215 static struct flock fls; /* static so initialized to zeroes */
216
217 fls.l_type = ltyp;
218 if (fcntl(fd, F_SETLKW, &fls) < 0) {
219 fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
220 progname, strerror(errno));
221 exit(1);
222 }
223 }
224
225
226 static void
227 init( /* set up output file and start rpict */
228 int ac,
229 char **av
230 )
231 {
232 static char hrbuf[16], vrbuf[16];
233 extern char VersionID[];
234 char *err;
235 FILE *fp;
236 int hr, vr;
237 SUBPROC rpd; /* since we don't close_process(), this can be local */
238 /* set up view */
239 if ((err = setview(&ourview)) != NULL) {
240 fprintf(stderr, "%s: %s\n", progname, err);
241 exit(1);
242 }
243 if (syncfp != NULL) {
244 sflock(F_RDLCK);
245 fscanf(syncfp, "%d %d", &hmult, &vmult);
246 sflock(F_UNLCK);
247 }
248 /* compute piece size */
249 hres /= hmult;
250 vres /= vmult;
251 if (hres <= 0 || vres <= 0) {
252 fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
253 exit(1);
254 }
255 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
256 sprintf(hrbuf, "%d", hres);
257 rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
258 sprintf(vrbuf, "%d", vres);
259 rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
260 rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
261 rpargv[rpargc++] = av[ac-1];
262 rpargv[rpargc] = NULL;
263 /* open output file */
264 if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
265 dolock(outfd, F_WRLCK);
266 if ((fp = fdopen(dup(outfd), "w")) == NULL)
267 goto filerr;
268 newheader("RADIANCE", fp); /* create header */
269 printargs(ac, av, fp);
270 fprintf(fp, "SOFTWARE= %s\n", VersionID);
271 fputs(VIEWSTR, fp);
272 fprintview(&ourview, fp);
273 putc('\n', fp);
274 if (pixaspect < .99 || pixaspect > 1.01)
275 fputaspect(pixaspect, fp);
276 fputformat(COLRFMT, fp);
277 putc('\n', fp);
278 fprtresolu(hres*hmult, vres*vmult, fp);
279 } else if ((outfd = open(outfile, O_RDWR)) >= 0) {
280 dolock(outfd, F_RDLCK);
281 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
282 goto filerr;
283 getheader(fp, NULL, NULL); /* skip header */
284 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
285 hr != hres*hmult || vr != vres*vmult) {
286 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
287 progname, outfile);
288 exit(1);
289 }
290 } else {
291 fprintf(stderr, "%s: cannot open file \"%s\"\n",
292 progname, outfile);
293 exit(1);
294 }
295 scanorig = ftell(fp); /* record position of first scanline */
296 if (fclose(fp) == -1) /* done with stream i/o */
297 goto filerr;
298 dolock(outfd, F_UNLCK);
299 /* start rpict process */
300 if (open_process(&rpd, rpargv) <= 0) {
301 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
302 exit(1);
303 }
304 if ((fromrp = fdopen(rpd.r, "r")) == NULL ||
305 (torp = fdopen(rpd.w, "w")) == NULL) {
306 fprintf(stderr, "%s: cannot open stream to %s\n",
307 progname, rpargv[0]);
308 exit(1);
309 }
310 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
311 fprintf(stderr, "%s: out of memory\n", progname);
312 exit(1);
313 }
314 signal(SIGALRM, onalrm);
315 if (timelim)
316 alarm(timelim);
317 return;
318 filerr:
319 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
320 exit(1);
321 }
322
323
324 static int
325 nextpiece( /* get next piece assignment */
326 int *xp,
327 int *yp
328 )
329 {
330 if (gotalrm) /* someone wants us to quit */
331 return(0);
332 if (syncfp != NULL) { /* use sync file */
333 /*
334 * So we don't necessarily have to lock and unlock the file
335 * multiple times (very slow), we establish an exclusive
336 * lock at the beginning on our synchronization file and
337 * maintain it in the subroutine rvrpiece().
338 */
339 sflock(F_WRLCK);
340 fseek(syncfp, 0L, 0); /* read position */
341 if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) {
342 *xp = hmult-1;
343 *yp = vmult;
344 }
345 if (rvrlim == 0) /* initialize recovery limit */
346 rvrlim = *xp*vmult + *yp;
347 if (rvrpiece(xp, yp)) { /* do stragglers first */
348 sflock(F_UNLCK);
349 return(1);
350 }
351 if (--(*yp) < 0) { /* decrement position */
352 *yp = vmult-1;
353 if (--(*xp) < 0) { /* all done */
354 sflock(F_UNLCK);
355 return(0);
356 }
357 }
358 fseek(syncfp, 0L, 0); /* write new position */
359 fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp);
360 fflush(syncfp);
361 sflock(F_UNLCK); /* release sync file */
362 return(1);
363 }
364 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
365 }
366
367
368 static int
369 rvrpiece( /* check for recoverable pieces */
370 register int *xp,
371 register int *yp
372 )
373 {
374 static char *pdone = NULL; /* which pieces are done */
375 static long readpos = -1; /* how far we've read */
376 register int i;
377 /*
378 * This routine is called by nextpiece() with an
379 * exclusive lock on syncfp and the file pointer at the
380 * appropriate position to read in the finished pieces.
381 */
382 if (rvrlim < 0)
383 return(0); /* only check if asked */
384 if (pdone == NULL) /* first call */
385 pdone = calloc(hmult*vmult, sizeof(char));
386 if (pdone == NULL) {
387 fprintf(stderr, "%s: out of memory\n", progname);
388 exit(1);
389 }
390 if (readpos != -1) /* mark what's been done */
391 fseek(syncfp, readpos, 0);
392 while (fscanf(syncfp, "%d %d", xp, yp) == 2)
393 pdone[*xp*vmult+*yp] = 1;
394 if (!feof(syncfp)) {
395 fprintf(stderr, "%s: format error in sync file\n", progname);
396 exit(1);
397 }
398 readpos = ftell(syncfp);
399 i = hmult*vmult; /* find an unaccounted for piece */
400 while (i-- > rvrlim)
401 if (!pdone[i]) {
402 *xp = i / vmult;
403 *yp = i % vmult;
404 pdone[i] = 1; /* consider it done */
405 return(1);
406 }
407 rvrlim = -1; /* nothing left to recover */
408 free(pdone);
409 pdone = NULL;
410 return(0);
411 }
412
413
414 static int
415 cleanup( /* close rpict process and clean up */
416 int rstat
417 )
418 {
419 int status;
420
421 bfree((char *)pbuf, hres*vres*sizeof(COLR));
422 fclose(torp);
423 fclose(fromrp);
424 while (wait(&status) != -1)
425 if (rstat == 0)
426 rstat = status>>8 & 0xff;
427 return(rstat);
428 }
429
430
431 static void
432 rpiece(void) /* render picture piece by piece */
433 {
434 VIEW pview;
435 int xorg, yorg;
436 /* compute view parameters */
437 pview = ourview;
438 switch (ourview.type) {
439 case VT_PER:
440 pview.horiz = (2.*180./PI)*atan(
441 tan((PI/180./2.)*ourview.horiz)/hmult );
442 pview.vert = (2.*180./PI)*atan(
443 tan((PI/180./2.)*ourview.vert)/vmult );
444 break;
445 case VT_PAR:
446 case VT_ANG:
447 pview.horiz = ourview.horiz / hmult;
448 pview.vert = ourview.vert / vmult;
449 break;
450 case VT_CYL:
451 pview.horiz = ourview.horiz / hmult;
452 pview.vert = (2.*180./PI)*atan(
453 tan((PI/180./2.)*ourview.vert)/vmult );
454 break;
455 case VT_HEM:
456 pview.horiz = (2.*180./PI)*asin(
457 sin((PI/180./2.)*ourview.horiz)/hmult );
458 pview.vert = (2.*180./PI)*asin(
459 sin((PI/180./2.)*ourview.vert)/vmult );
460 break;
461 case VT_PLS:
462 pview.horiz = sin((PI/180./2.)*ourview.horiz) /
463 (1.0 + cos((PI/180./2.)*ourview.horiz)) / hmult;
464 pview.horiz *= pview.horiz;
465 pview.horiz = (2.*180./PI)*acos((1. - pview.horiz) /
466 (1. + pview.horiz));
467 pview.vert = sin((PI/180./2.)*ourview.vert) /
468 (1.0 + cos((PI/180./2.)*ourview.vert)) / vmult;
469 pview.vert *= pview.vert;
470 pview.vert = (2.*180./PI)*acos((1. - pview.vert) /
471 (1. + pview.vert));
472 break;
473 default:
474 fprintf(stderr, "%s: unknown view type '-vt%c'\n",
475 progname, ourview.type);
476 exit(cleanup(1));
477 }
478 /* render each piece */
479 while (nextpiece(&xorg, &yorg)) {
480 pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1);
481 pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1);
482 fputs(VIEWSTR, torp);
483 fprintview(&pview, torp);
484 putc('\n', torp);
485 fflush(torp); /* assigns piece to rpict */
486 putpiece(xorg, yorg); /* place piece in output */
487 }
488 }
489
490
491 static int
492 putpiece( /* get next piece from rpict */
493 int xpos,
494 int ypos
495 )
496 {
497 struct flock fls;
498 int pid, status;
499 int hr, vr;
500 register int y;
501 /* check bounds */
502 if ((xpos < 0) | (ypos < 0) | (xpos >= hmult) | (ypos >= vmult)) {
503 fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
504 progname, xpos, ypos);
505 exit(cleanup(1));
506 }
507 /* check header from rpict */
508 guard_io();
509 getheader(fromrp, NULL, NULL);
510 if (!fscnresolu(&hr, &vr, fromrp) || (hr != hres) | (vr != vres)) {
511 fprintf(stderr, "%s: resolution mismatch from %s\n",
512 progname, rpargv[0]);
513 exit(cleanup(1));
514 }
515 if (verbose) { /* notify caller */
516 printf("%d %d begun\n", xpos, ypos);
517 fflush(stdout);
518 }
519 unguard();
520 /* load new piece into buffer */
521 for (y = 0; y < vr; y++) {
522 guard_io();
523 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
524 fprintf(stderr, "%s: read error from %s\n",
525 progname, rpargv[0]);
526 exit(cleanup(1));
527 }
528 unguard();
529 }
530 #if MAXFORK
531 /* fork so we don't slow rpict down */
532 if ((pid = fork()) > 0) {
533 if (++nforked >= MAXFORK) {
534 wait(&status); /* reap a child */
535 if (status)
536 exit(cleanup(status>>8 & 0xff));
537 nforked--;
538 }
539 return(pid);
540 }
541 #else
542 pid = -1; /* no forking */
543 #endif
544 fls.l_start = scanorig +
545 ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
546 #if NFS
547 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
548 /* lock file section so NFS doesn't mess up */
549 fls.l_whence = 0;
550 fls.l_type = F_WRLCK;
551 if (fcntl(outfd, F_SETLKW, &fls) < 0)
552 filerr("lock");
553 #endif
554 /* write new piece to file */
555 if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
556 filerr("seek");
557 if (hmult == 1) {
558 if (writebuf(outfd, (char *)pbuf,
559 vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
560 filerr("write");
561 } else
562 for (y = 0; y < vr; y++) {
563 if (writebuf(outfd, (char *)(pbuf+y*hr),
564 hr*sizeof(COLR)) != hr*sizeof(COLR))
565 filerr("write");
566 if (y < vr-1 && lseek(outfd,
567 (off_t)(hmult-1)*hr*sizeof(COLR),
568 SEEK_CUR) < 0)
569 filerr("seek");
570 }
571 #if NFS
572 fls.l_type = F_UNLCK; /* release lock */
573 if (fcntl(outfd, F_SETLKW, &fls) < 0)
574 filerr("lock");
575 #endif
576 if (verbose) { /* notify caller */
577 printf("%d %d done\n", xpos, ypos);
578 fflush(stdout);
579 }
580 if (syncfp != NULL) { /* record what's been done */
581 sflock(F_WRLCK);
582 fseek(syncfp, 0L, 2); /* append index */
583 fprintf(syncfp, "%4d %4d\n", xpos, ypos);
584 fflush(syncfp);
585 /*** Unlock not necessary, since
586 sflock(F_UNLCK); _exit() or nextpiece() is next ***/
587 }
588 if (pid == -1) /* didn't fork or fork failed */
589 return(0);
590 _exit(0); /* else exit child process (releasing locks) */
591 }
592
593
594 static void
595 filerr( /* report file error and exit */
596 char *t
597 )
598 {
599 fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
600 progname, t, outfile, strerror(errno));
601 _exit(1);
602 }
603
604 #endif