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root/radiance/ray/src/util/rpiece.c
Revision: 2.65
Committed: Wed Aug 21 16:18:54 2024 UTC (8 months, 1 week ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.64: +1 -3 lines
Log Message:
chore: Minor compiler warning fixes

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: rpiece.c,v 2.64 2024/07/03 17:18:17 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
13 #include "platform.h"
14 #ifndef NON_POSIX /* XXX need abstraction for process management */
15 #include <sys/wait.h>
16 #endif
17
18 #include "standard.h"
19 #include "color.h"
20 #include "view.h"
21 #include "rtprocess.h"
22
23 #ifndef F_SETLKW
24
25 int
26 main(
27 int argc,
28 char *argv[]
29 )
30 {
31 fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
32 exit(1);
33 }
34
35 #else
36
37 #ifndef NFS
38 #define NFS 1
39 #endif
40
41 #ifndef RHAS_FORK_EXEC
42 #undef MAXFORK
43 #define MAXFORK 0
44 #endif
45 #ifndef MAXFORK
46 #if NFS
47 #define MAXFORK 3 /* allotment of duped processes */
48 #else
49 #define MAXFORK 0
50 #endif
51 #endif
52 /* protection from SYSV signals(!) */
53 #if defined(sgi)
54 #define guard_io() sighold(SIGALRM)
55 #define unguard() sigrelse(SIGALRM)
56 #endif
57 #ifndef guard_io
58 #define guard_io()
59 #define unguard()
60 #endif
61
62 /* rpict command */
63 char *rpargv[128] = {"rpict", "-S", "1"};
64 int rpargc = 3;
65 FILE *torp, *fromrp;
66 COLR *pbuf;
67 /* our view parameters */
68 VIEW ourview = STDVIEW;
69 double pixaspect = 1.0;
70 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
71 /* output file */
72 char *outfile = NULL;
73 int outfd;
74 long scanorig;
75 FILE *syncfp = NULL; /* synchronization file pointer */
76 int synclst = F_UNLCK; /* synchronization file lock status */
77 int nforked = 0;
78
79 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
80
81 char *progname;
82 int verbose = 0;
83 int nowarn = 0;
84 unsigned timelim = 0;
85 int rvrlim = -1;
86
87 int gotalrm = 0;
88 void onalrm(int i) { gotalrm++; }
89
90 static void dolock(int fd, int ltyp);
91 static void init(int ac, char **av);
92 static int nextpiece(int *xp, int *yp);
93 static int rvrpiece(int *xp, int *yp);
94 static int cleanup(int rstat);
95 static void rpiece(void);
96 static int putpiece(int xpos, int ypos);
97 static void filerr(char *t);
98
99
100 int
101 main(
102 int argc,
103 char *argv[]
104 )
105 {
106 int i, rval;
107
108 progname = argv[0];
109 for (i = 1; i < argc; i++) {
110 /* expand arguments */
111 while ((rval = expandarg(&argc, &argv, i)) > 0)
112 ;
113 if (rval < 0) {
114 fprintf(stderr, "%s: cannot expand '%s'\n",
115 argv[0], argv[i]);
116 exit(1);
117 }
118 if (argv[i][0] == '-')
119 switch (argv[i][1]) {
120 case 'w':
121 if (!argv[i][2])
122 nowarn = !nowarn;
123 else if (argv[i][2] == '+')
124 nowarn = 0;
125 else if (argv[i][2] == '-')
126 nowarn = 1;
127 break;
128 case 'v':
129 switch (argv[i][2]) {
130 case '\0': /* verbose option */
131 verbose = !verbose;
132 continue;
133 case 'f': /* view file */
134 if (viewfile(argv[++i], &ourview, NULL) <= 0) {
135 fprintf(stderr,
136 "%s: not a view file\n", argv[i]);
137 exit(1);
138 }
139 continue;
140 default: /* view option? */
141 rval = getviewopt(&ourview, argc-i, argv+i);
142 if (rval >= 0) {
143 i += rval;
144 continue;
145 }
146 break;
147 }
148 break;
149 case 'p': /* pixel aspect ratio? */
150 if (argv[i][2] == 'm') {
151 fprintf(stderr, "%s: -pm unsupported\n",
152 argv[0]);
153 ++i;
154 continue;
155 }
156 if (argv[i][2] == 'X') {
157 fprintf(stderr, "%s: -pXYZ unsupported\n",
158 argv[0]);
159 ++i;
160 continue;
161 }
162 if (argv[i][2] == 'c') {
163 fprintf(stderr, "%s: -pc unsupported\n",
164 argv[0]);
165 i += 9;
166 continue;
167 }
168 if (argv[i][2] != 'a' || argv[i][3])
169 break;
170 pixaspect = atof(argv[++i]);
171 continue;
172 case 'S':
173 fprintf(stderr, "%s: -S unsupported\n", argv[0]);
174 i++;
175 continue;
176 case 'T': /* time limit (hours) */
177 if (argv[i][2])
178 break;
179 timelim = atof(argv[++i])*3600. + .5;
180 continue;
181 case 'x': /* overall x resolution */
182 if (argv[i][2])
183 break;
184 hres = atoi(argv[++i]);
185 continue;
186 case 'y': /* overall y resolution */
187 if (argv[i][2])
188 break;
189 vres = atoi(argv[++i]);
190 continue;
191 case 'X': /* horizontal multiplier */
192 if (argv[i][2])
193 break;
194 hmult = atoi(argv[++i]);
195 continue;
196 case 'Y': /* vertical multiplier */
197 if (argv[i][2])
198 break;
199 vmult = atoi(argv[++i]);
200 continue;
201 case 'R': /* recover */
202 if (argv[i][2])
203 break;
204 rvrlim = 0;
205 /* fall through */
206 case 'F': /* syncronization file */
207 if (argv[i][2])
208 break;
209 if ((syncfp =
210 fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
211 fprintf(stderr, "%s: cannot open\n",
212 argv[i]);
213 exit(1);
214 }
215 continue;
216 case 'z': /* z-file ist verbotten */
217 fprintf(stderr, "%s: -z option not allowed\n",
218 argv[0]);
219 exit(1);
220 case 'o': /* output file */
221 if (argv[i][2])
222 break;
223 outfile = argv[++i];
224 continue;
225 }
226 else if (i >= argc-1)
227 break;
228 rpargv[rpargc++] = argv[i];
229 }
230 if (i >= argc) {
231 fprintf(stderr, "%s: missing octree argument\n", argv[0]);
232 exit(1);
233 }
234 if (outfile == NULL) {
235 fprintf(stderr, "%s: missing output file\n", argv[0]);
236 exit(1);
237 }
238 init(argc, argv);
239 rpiece();
240 exit(cleanup(0));
241 }
242
243
244 static void
245 dolock( /* lock or unlock a file */
246 int fd,
247 int ltyp
248 )
249 {
250 static struct flock fls; /* static so initialized to zeroes */
251
252 fls.l_type = ltyp;
253 if (fcntl(fd, F_SETLKW, &fls) < 0) {
254 fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
255 progname, strerror(errno));
256 _exit(1);
257 }
258 }
259
260
261 static void
262 init( /* set up output file and start rpict */
263 int ac,
264 char **av
265 )
266 {
267 static char hrbuf[16], vrbuf[16];
268 extern char VersionID[];
269 char *err;
270 FILE *fp;
271 int hr, vr;
272 SUBPROC rpd; /* since we don't close_process(), this can be local */
273 /* set up view */
274 if ((err = setview(&ourview)) != NULL) {
275 fprintf(stderr, "%s: %s\n", progname, err);
276 exit(1);
277 }
278 if (syncfp != NULL) {
279 sflock(F_RDLCK);
280 fscanf(syncfp, "%d %d", &hmult, &vmult);
281 sflock(F_UNLCK);
282 }
283 /* compute piece size */
284 hr = hres; vr = vres;
285 if (pixaspect > FTINY)
286 normaspect(viewaspect(&ourview), &pixaspect, &hr, &vr);
287 hres /= hmult;
288 vres /= vmult;
289 if (hres <= 0 || vres <= 0) {
290 fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
291 exit(1);
292 }
293 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
294 if (!nowarn && (hr != hres*hmult) | (vr != vres*vmult))
295 fprintf(stderr,
296 "%s: warning - changed resolution from %dx%d to %dx%d\n",
297 progname, hr, vr, hres*hmult, vres*vmult);
298 sprintf(hrbuf, "%d", hres);
299 rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
300 sprintf(vrbuf, "%d", vres);
301 rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
302 rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
303 rpargv[rpargc++] = "-pm"; rpargv[rpargc++] = "0";
304 rpargv[rpargc++] = av[ac-1];
305 rpargv[rpargc] = NULL;
306 /* open output file */
307 if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
308 dolock(outfd, F_WRLCK);
309 if ((fp = fdopen(dup(outfd), "w")) == NULL)
310 goto filerr;
311 newheader("RADIANCE", fp); /* create header */
312 printargs(ac, av, fp);
313 fprintf(fp, "SOFTWARE= %s\n", VersionID);
314 fputs(VIEWSTR, fp);
315 fprintview(&ourview, fp);
316 fputc('\n', fp);
317 fputnow(fp);
318 if (pixaspect < .99 || pixaspect > 1.01)
319 fputaspect(pixaspect, fp);
320 fputprims(stdprims, fp);
321 fputformat(COLRFMT, fp);
322 fputc('\n', fp);
323 fprtresolu(hres*hmult, vres*vmult, fp);
324 } else if ((outfd = open(outfile, O_RDWR)) >= 0) {
325 dolock(outfd, F_RDLCK);
326 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
327 goto filerr;
328 getheader(fp, NULL, NULL); /* skip header */
329 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
330 hr != hres*hmult || vr != vres*vmult) {
331 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
332 progname, outfile);
333 exit(1);
334 }
335 } else {
336 fprintf(stderr, "%s: cannot open file \"%s\"\n",
337 progname, outfile);
338 exit(1);
339 }
340 scanorig = ftell(fp); /* record position of first scanline */
341 if (fclose(fp) == -1) /* done with stream i/o */
342 goto filerr;
343 dolock(outfd, F_UNLCK);
344 /* start rpict process */
345 rpd = sp_inactive;
346 if (open_process(&rpd, rpargv) <= 0) {
347 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
348 exit(1);
349 }
350 if ((fromrp = fdopen(rpd.r, "r")) == NULL ||
351 (torp = fdopen(rpd.w, "w")) == NULL) {
352 fprintf(stderr, "%s: cannot open stream to %s\n",
353 progname, rpargv[0]);
354 exit(1);
355 }
356 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
357 fprintf(stderr, "%s: out of memory\n", progname);
358 exit(1);
359 }
360 signal(SIGALRM, onalrm);
361 if (timelim)
362 alarm(timelim);
363 return;
364 filerr:
365 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
366 exit(1);
367 }
368
369
370 static int
371 nextpiece( /* get next piece assignment */
372 int *xp,
373 int *yp
374 )
375 {
376 if (gotalrm) /* someone wants us to quit */
377 return(0);
378 if (syncfp != NULL) { /* use sync file */
379 /*
380 * So we don't necessarily have to lock and unlock the file
381 * multiple times (very slow), we establish an exclusive
382 * lock at the beginning on our synchronization file and
383 * maintain it in the subroutine rvrpiece().
384 */
385 sflock(F_WRLCK);
386 fseek(syncfp, 0L, 0); /* read position */
387 if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) {
388 *xp = hmult-1;
389 *yp = vmult;
390 }
391 if (rvrlim == 0) /* initialize recovery limit */
392 rvrlim = *xp*vmult + *yp;
393 if (rvrpiece(xp, yp)) { /* do stragglers first */
394 sflock(F_UNLCK);
395 return(1);
396 }
397 if (--(*yp) < 0) { /* decrement position */
398 *yp = vmult-1;
399 if (--(*xp) < 0) { /* all done */
400 sflock(F_UNLCK);
401 return(0);
402 }
403 }
404 fseek(syncfp, 0L, 0); /* write new position */
405 fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp);
406 fflush(syncfp);
407 sflock(F_UNLCK); /* release sync file */
408 return(1);
409 }
410 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
411 }
412
413
414 static int
415 rvrpiece( /* check for recoverable pieces */
416 int *xp,
417 int *yp
418 )
419 {
420 static char *pdone = NULL; /* which pieces are done */
421 static long readpos = -1; /* how far we've read */
422 int px, py, i;
423 /*
424 * This routine is called by nextpiece() with an
425 * exclusive lock on syncfp and the file pointer at the
426 * appropriate position to read in the finished pieces.
427 */
428 if (rvrlim < 0)
429 return(0); /* only check if asked */
430 if (pdone == NULL) /* first call */
431 pdone = (char *)calloc(hmult*vmult, sizeof(char));
432 if (pdone == NULL) {
433 fprintf(stderr, "%s: out of memory\n", progname);
434 exit(1);
435 }
436 if (readpos != -1) /* mark what's been done */
437 fseek(syncfp, readpos, 0);
438 while (fscanf(syncfp, "%d %d", &px, &py) == 2)
439 pdone[px*vmult+py] = 1;
440 if (!feof(syncfp)) {
441 fprintf(stderr, "%s: format error in sync file\n", progname);
442 exit(1);
443 }
444 readpos = ftell(syncfp);
445 i = hmult*vmult; /* find an unaccounted for piece */
446 while (i-- > rvrlim)
447 if (!pdone[i]) {
448 *xp = i / vmult;
449 *yp = i % vmult;
450 pdone[i] = 1; /* consider it done */
451 return(1);
452 }
453 rvrlim = -1; /* nothing left to recover */
454 free(pdone);
455 pdone = NULL;
456 return(0);
457 }
458
459
460 static int
461 cleanup( /* close rpict process and clean up */
462 int rstat
463 )
464 {
465 int status;
466
467 bfree((char *)pbuf, hres*vres*sizeof(COLR));
468 fclose(torp);
469 fclose(fromrp);
470 while (wait(&status) != -1)
471 if (rstat == 0)
472 rstat = status>>8 & 0xff;
473 return(rstat);
474 }
475
476
477 static void
478 rpiece(void) /* render picture piece by piece */
479 {
480 char *err;
481 VIEW pview;
482 int xorg, yorg;
483 /* render each piece */
484 while (nextpiece(&xorg, &yorg)) {
485 pview = ourview;
486 err = cropview(&pview, (double)xorg/hmult, (double)yorg/vmult,
487 (xorg+1.)/hmult, (yorg+1.)/vmult);
488 if (err != NULL) {
489 fprintf(stderr, "%s: %s\n", progname, err);
490 exit(cleanup(1));
491 }
492 fputs(VIEWSTR, torp);
493 fprintview(&pview, torp);
494 fputc('\n', torp);
495 fflush(torp); /* assigns piece to rpict */
496 putpiece(xorg, yorg); /* place piece in output */
497 }
498 }
499
500
501 static int
502 putpiece( /* get next piece from rpict */
503 int xpos,
504 int ypos
505 )
506 {
507 struct flock fls;
508 int pid, status;
509 int hr, vr;
510 int y;
511 /* check bounds */
512 if ((xpos < 0) | (ypos < 0) | (xpos >= hmult) | (ypos >= vmult)) {
513 fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
514 progname, xpos, ypos);
515 exit(cleanup(1));
516 }
517 /* check header from rpict */
518 guard_io();
519 getheader(fromrp, NULL, NULL);
520 if (!fscnresolu(&hr, &vr, fromrp) || (hr != hres) | (vr != vres)) {
521 fprintf(stderr, "%s: resolution mismatch from %s\n",
522 progname, rpargv[0]);
523 exit(cleanup(1));
524 }
525 if (verbose) { /* notify caller */
526 printf("%d %d begun\n", xpos, ypos);
527 fflush(stdout);
528 }
529 unguard();
530 /* load new piece into buffer */
531 for (y = 0; y < vr; y++) {
532 guard_io();
533 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
534 fprintf(stderr, "%s: read error from %s\n",
535 progname, rpargv[0]);
536 exit(cleanup(1));
537 }
538 unguard();
539 }
540 #if MAXFORK
541 /* fork so we don't slow rpict down */
542 if ((pid = fork()) > 0) {
543 if (++nforked >= MAXFORK) {
544 wait(&status); /* reap a child */
545 if (status)
546 exit(cleanup(status>>8 & 0xff));
547 nforked--;
548 }
549 return(pid);
550 }
551 #else
552 pid = -1; /* no forking */
553 #endif
554 fls.l_start = scanorig +
555 ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
556 #if NFS
557 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
558 /* lock file section so NFS doesn't mess up */
559 fls.l_whence = 0;
560 fls.l_type = F_WRLCK;
561 #if 0
562 if (fcntl(outfd, F_SETLKW, &fls) < 0)
563 filerr("lock");
564 #else
565 dolock(outfd, F_WRLCK);
566 #endif
567 #endif
568 /* write new piece to file */
569 if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
570 filerr("seek");
571 if (hmult == 1) {
572 if (writebuf(outfd, pbuf,
573 vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
574 filerr("write");
575 } else
576 for (y = 0; y < vr; y++) {
577 if (writebuf(outfd, pbuf+y*hr,
578 hr*sizeof(COLR)) != hr*sizeof(COLR))
579 filerr("write");
580 if (y < vr-1 && lseek(outfd,
581 (off_t)(hmult-1)*hr*sizeof(COLR),
582 SEEK_CUR) < 0)
583 filerr("seek");
584 }
585 #if NFS
586 fls.l_type = F_UNLCK; /* release lock */
587 #if 0
588 if (fcntl(outfd, F_SETLKW, &fls) < 0)
589 filerr("lock");
590 #else
591 dolock(outfd, F_UNLCK);
592 #endif
593 #endif
594 if (verbose) { /* notify caller */
595 printf("%d %d done\n", xpos, ypos);
596 fflush(stdout);
597 }
598 if (syncfp != NULL) { /* record what's been done */
599 sflock(F_WRLCK);
600 fseek(syncfp, 0L, 2); /* append index */
601 fprintf(syncfp, "%4d %4d\n", xpos, ypos);
602 fflush(syncfp);
603 /*** Unlock not necessary, since
604 sflock(F_UNLCK); _exit() or nextpiece() is next ***/
605 }
606 if (pid == -1) /* didn't fork or fork failed */
607 return(0);
608 _exit(0); /* else exit child process (releasing locks) */
609 }
610
611
612 static void
613 filerr( /* report file error and exit */
614 char *t
615 )
616 {
617 fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
618 progname, t, outfile, strerror(errno));
619 _exit(1);
620 }
621
622 #endif