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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

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.37 static const char RCSid[] = "$Id$";
3 greg 2.1 #endif
4     /*
5     * Generate sections of a picture.
6     */
7    
8     #include "standard.h"
9 greg 2.16
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 greg 2.6 #include <signal.h>
23 greg 2.1 #include "color.h"
24     #include "view.h"
25    
26 greg 2.12 #ifndef NFS
27     #define NFS 1
28     #endif
29 greg 2.9 /* set the following to 0 to forgo forking */
30     #ifndef MAXFORK
31 greg 2.12 #if NFS
32 greg 2.10 #define MAXFORK 3 /* allotment of duped processes */
33 greg 2.12 #else
34     #define MAXFORK 0
35 greg 2.9 #endif
36 greg 2.12 #endif
37 greg 2.18 /* protection from SYSV signals(!) */
38 greg 2.27 #if defined(sgi)
39 greg 2.18 #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 gregl 2.34
47 greg 2.37 extern char *strerror();
48 gregl 2.34
49 greg 2.1 /* rpict command */
50 greg 2.23 char *rpargv[128] = {"rpict", "-S", "1"};
51     int rpargc = 3;
52 greg 2.1 int rpd[3];
53     FILE *torp, *fromrp;
54 greg 2.8 COLR *pbuf;
55 greg 2.1 /* our view parameters */
56     VIEW ourview = STDVIEW;
57 greg 2.4 double pixaspect = 1.0;
58 greg 2.23 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
59 greg 2.1 /* output file */
60     char *outfile = NULL;
61     int outfd;
62     long scanorig;
63 greg 2.25 FILE *syncfp = NULL; /* synchronization file pointer */
64     int synclst = F_UNLCK; /* synchronization file lock status */
65 greg 2.9 int nforked = 0;
66 greg 2.1
67 greg 2.25 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
68    
69 greg 2.1 char *progname;
70     int verbose = 0;
71 greg 2.31 unsigned timelim = 0;
72 greg 2.25 int rvrlim = -1;
73 greg 2.1
74 greg 2.6 int gotalrm = 0;
75     int onalrm() { gotalrm++; }
76 greg 2.1
77 greg 2.6
78 greg 2.1 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 greg 2.22 /* expand arguments */
87 greg 2.37 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 greg 2.1 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 greg 2.23 if (argv[i][2] != 'a' || argv[i][3])
119     break;
120 gregl 2.35 pixaspect = atof(argv[++i]);
121 greg 2.23 continue;
122 greg 2.31 case 'T': /* time limit (hours) */
123     if (argv[i][2])
124     break;
125     timelim = atof(argv[++i])*3600. + .5;
126     break;
127 greg 2.23 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 greg 2.1 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 greg 2.25 case 'R': /* recover */
148     if (argv[i][2])
149     break;
150     rvrlim = 0;
151     /* fall through */
152 greg 2.5 case 'F': /* syncronization file */
153     if (argv[i][2])
154     break;
155 greg 2.28 if ((syncfp =
156     fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
157 greg 2.5 fprintf(stderr, "%s: cannot open\n",
158     argv[i]);
159     exit(1);
160     }
161     continue;
162 greg 2.15 case 'z': /* z-file ist verbotten */
163     fprintf(stderr, "%s: -z option not allowed\n",
164     argv[0]);
165     exit(1);
166 greg 2.1 case 'o': /* output file */
167     if (argv[i][2])
168     break;
169     outfile = argv[++i];
170     continue;
171 greg 2.23 } else if (i >= argc-1)
172     break;
173 greg 2.1 rpargv[rpargc++] = argv[i];
174     }
175 greg 2.23 if (i >= argc) {
176     fprintf(stderr, "%s: missing octree argument\n", argv[0]);
177     exit(1);
178     }
179 greg 2.1 if (outfile == NULL) {
180     fprintf(stderr, "%s: missing output file\n", argv[0]);
181     exit(1);
182     }
183     init(argc, argv);
184     rpiece();
185 greg 2.15 exit(cleanup(0));
186 greg 2.1 }
187    
188    
189 greg 2.25 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 greg 2.28 fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
198 greg 2.37 progname, strerror(errno));
199 greg 2.25 exit(1);
200     }
201     }
202    
203    
204 greg 2.1 init(ac, av) /* set up output file and start rpict */
205     int ac;
206     char **av;
207     {
208 greg 2.23 static char hrbuf[16], vrbuf[16];
209 greg 2.2 extern char VersionID[];
210 greg 2.1 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 greg 2.25 if (syncfp != NULL) {
219     sflock(F_RDLCK);
220     fscanf(syncfp, "%d %d", &hmult, &vmult);
221     sflock(F_UNLCK);
222 greg 2.5 }
223 greg 2.23 /* compute piece size */
224     hres /= hmult;
225     vres /= vmult;
226 greg 2.1 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
227 greg 2.23 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 greg 2.1 /* open output file */
235     if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
236 greg 2.25 dolock(outfd, F_WRLCK);
237 greg 2.1 if ((fp = fdopen(dup(outfd), "w")) == NULL)
238     goto filerr;
239 greg 2.29 newheader("RADIANCE", fp); /* create header */
240     printargs(ac, av, fp);
241 greg 2.2 fprintf(fp, "SOFTWARE= %s\n", VersionID);
242 greg 2.1 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 greg 2.25 dolock(outfd, F_RDLCK);
252 greg 2.1 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
253     goto filerr;
254 greg 2.13 getheader(fp, NULL, NULL); /* skip header */
255 greg 2.15 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
256 greg 2.1 hr != hres*hmult || vr != vres*vmult) {
257 greg 2.8 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
258     progname, outfile);
259 greg 2.1 exit(1);
260     }
261     } else {
262 greg 2.8 fprintf(stderr, "%s: cannot open file \"%s\"\n",
263     progname, outfile);
264 greg 2.1 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 greg 2.25 dolock(outfd, F_UNLCK);
270 greg 2.1 /* start rpict process */
271     if (open_process(rpd, rpargv) <= 0) {
272 greg 2.3 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
273 greg 2.1 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 greg 2.23 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
282 greg 2.1 fprintf(stderr, "%s: out of memory\n", progname);
283     exit(1);
284     }
285 greg 2.6 signal(SIGALRM, onalrm);
286 greg 2.31 if (timelim)
287     alarm(timelim);
288 greg 2.1 return;
289     filerr:
290 greg 2.8 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
291 greg 2.1 exit(1);
292     }
293    
294    
295     int
296 greg 2.5 nextpiece(xp, yp) /* get next piece assignment */
297     int *xp, *yp;
298     {
299 greg 2.6 if (gotalrm) /* someone wants us to quit */
300     return(0);
301 greg 2.25 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 greg 2.8 *xp = hmult-1;
312     *yp = vmult;
313     }
314 greg 2.25 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 greg 2.8 if (--(*yp) < 0) { /* decrement position */
321 greg 2.5 *yp = vmult-1;
322 greg 2.25 if (--(*xp) < 0) { /* all done */
323     sflock(F_UNLCK);
324 greg 2.5 return(0);
325     }
326     }
327 greg 2.25 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 greg 2.5 return(1);
332     }
333 greg 2.26 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
334 greg 2.5 }
335    
336    
337     int
338 greg 2.25 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 greg 2.30 if (pdone == NULL) {
354     fprintf(stderr, "%s: out of memory\n", progname);
355     exit(1);
356     }
357 greg 2.25 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 greg 2.10 cleanup(rstat) /* close rpict process and clean up */
383     int rstat;
384 greg 2.1 {
385 greg 2.10 int status;
386 greg 2.1
387 greg 2.23 bfree((char *)pbuf, hres*vres*sizeof(COLR));
388 greg 2.1 fclose(torp);
389     fclose(fromrp);
390 greg 2.10 while (wait(&status) != -1)
391 greg 2.9 if (rstat == 0)
392     rstat = status>>8 & 0xff;
393     return(rstat);
394 greg 2.1 }
395    
396    
397     rpiece() /* render picture piece by piece */
398     {
399     VIEW pview;
400     int xorg, yorg;
401 greg 2.11 /* 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 greg 2.32 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 greg 2.11 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 greg 2.5 while (nextpiece(&xorg, &yorg)) {
433 gregl 2.33 pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1);
434     pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1);
435 greg 2.1 fputs(VIEWSTR, torp);
436     fprintview(&pview, torp);
437     putc('\n', torp);
438 greg 2.11 fflush(torp); /* assigns piece to rpict */
439 greg 2.1 putpiece(xorg, yorg); /* place piece in output */
440     }
441     }
442    
443    
444 greg 2.9 int
445 greg 2.1 putpiece(xpos, ypos) /* get next piece from rpict */
446     int xpos, ypos;
447     {
448 greg 2.7 struct flock fls;
449 greg 2.9 int pid, status;
450 greg 2.1 int hr, vr;
451 greg 2.8 register int y;
452     /* check bounds */
453 greg 2.5 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 greg 2.10 exit(cleanup(1));
457 greg 2.5 }
458 greg 2.8 /* check header from rpict */
459 greg 2.18 guard_io();
460 greg 2.13 getheader(fromrp, NULL, NULL);
461 greg 2.15 if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) {
462 greg 2.3 fprintf(stderr, "%s: resolution mismatch from %s\n",
463     progname, rpargv[0]);
464 greg 2.10 exit(cleanup(1));
465 greg 2.1 }
466 greg 2.24 if (verbose) { /* notify caller */
467     printf("%d %d begun\n", xpos, ypos);
468     fflush(stdout);
469     }
470 greg 2.18 unguard();
471 greg 2.8 /* load new piece into buffer */
472 greg 2.18 for (y = 0; y < vr; y++) {
473     guard_io();
474 greg 2.8 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
475 greg 2.3 fprintf(stderr, "%s: read error from %s\n",
476     progname, rpargv[0]);
477 greg 2.10 exit(cleanup(1));
478 greg 2.1 }
479 greg 2.18 unguard();
480     }
481 greg 2.9 #if MAXFORK
482     /* fork so we don't slow rpict down */
483     if ((pid = fork()) > 0) {
484 greg 2.10 if (++nforked >= MAXFORK) {
485 greg 2.9 wait(&status); /* reap a child */
486     if (status)
487 greg 2.10 exit(cleanup(status>>8 & 0xff));
488 greg 2.9 nforked--;
489     }
490     return(pid);
491     }
492     #else
493     pid = -1; /* no forking */
494     #endif
495 greg 2.19 fls.l_start = scanorig +
496     ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
497 greg 2.12 #if NFS
498 greg 2.19 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
499 greg 2.8 /* lock file section so NFS doesn't mess up */
500     fls.l_whence = 0;
501     fls.l_type = F_WRLCK;
502 greg 2.26 if (fcntl(outfd, F_SETLKW, &fls) < 0)
503     filerr("lock");
504 greg 2.12 #endif
505 greg 2.8 /* write new piece to file */
506 greg 2.37 if (lseek(outfd, (off_t)fls.l_start, 0) < 0)
507 greg 2.26 filerr("seek");
508 greg 2.9 if (hmult == 1) {
509     if (writebuf(outfd, (char *)pbuf,
510     vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
511 greg 2.26 filerr("write");
512 greg 2.9 } else
513     for (y = 0; y < vr; y++) {
514     if (writebuf(outfd, (char *)(pbuf+y*hr),
515     hr*sizeof(COLR)) != hr*sizeof(COLR))
516 greg 2.26 filerr("write");
517 greg 2.9 if (y < vr-1 && lseek(outfd,
518 greg 2.37 (off_t)(hmult-1)*hr*sizeof(COLR),
519 gwlarson 2.36 1) < 0)
520 greg 2.26 filerr("seek");
521 greg 2.1 }
522 greg 2.25 #if NFS
523     fls.l_type = F_UNLCK; /* release lock */
524 greg 2.26 if (fcntl(outfd, F_SETLKW, &fls) < 0)
525     filerr("lock");
526 greg 2.25 #endif
527 greg 2.32 if (verbose) { /* notify caller */
528     printf("%d %d done\n", xpos, ypos);
529     fflush(stdout);
530     }
531 greg 2.25 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 greg 2.20 }
539 greg 2.25 if (pid == -1) /* didn't fork or fork failed */
540 greg 2.9 return(0);
541 greg 2.25 _exit(0); /* else exit child process (releasing locks) */
542 greg 2.26 }
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 greg 2.37 progname, t, outfile, strerror(errno));
550 greg 2.9 _exit(1);
551 greg 2.1 }
552 greg 2.16
553     #endif