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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

# User Rev Content
1 greg 2.31 /* Copyright (c) 1995 Regents of the University of California */
2 greg 2.1
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 greg 2.16
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 greg 2.6 #include <signal.h>
26 greg 2.1 #include "color.h"
27     #include "view.h"
28     #include "resolu.h"
29    
30 greg 2.12 #ifndef NFS
31     #define NFS 1
32     #endif
33 greg 2.9 /* set the following to 0 to forgo forking */
34     #ifndef MAXFORK
35 greg 2.12 #if NFS
36 greg 2.10 #define MAXFORK 3 /* allotment of duped processes */
37 greg 2.12 #else
38     #define MAXFORK 0
39 greg 2.9 #endif
40 greg 2.12 #endif
41 greg 2.18 /* protection from SYSV signals(!) */
42 greg 2.27 #if defined(sgi)
43 greg 2.18 #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 greg 2.1 /* rpict command */
51 greg 2.23 char *rpargv[128] = {"rpict", "-S", "1"};
52     int rpargc = 3;
53 greg 2.1 int rpd[3];
54     FILE *torp, *fromrp;
55 greg 2.8 COLR *pbuf;
56 greg 2.1 /* our view parameters */
57     VIEW ourview = STDVIEW;
58 greg 2.4 double pixaspect = 1.0;
59 greg 2.23 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
60 greg 2.1 /* output file */
61     char *outfile = NULL;
62     int outfd;
63     long scanorig;
64 greg 2.25 FILE *syncfp = NULL; /* synchronization file pointer */
65     int synclst = F_UNLCK; /* synchronization file lock status */
66 greg 2.9 int nforked = 0;
67 greg 2.1
68 greg 2.25 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
69    
70 greg 2.1 char *progname;
71     int verbose = 0;
72 greg 2.31 unsigned timelim = 0;
73 greg 2.25 int rvrlim = -1;
74 greg 2.1
75     extern long lseek(), ftell();
76    
77 greg 2.6 int gotalrm = 0;
78     int onalrm() { gotalrm++; }
79 greg 2.1
80 greg 2.6
81 greg 2.1 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 greg 2.22 /* 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 greg 2.1 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 greg 2.23 if (argv[i][2] != 'a' || argv[i][3])
121     break;
122     pixaspect = atof(argv[i+1]);
123     continue;
124 greg 2.31 case 'T': /* time limit (hours) */
125     if (argv[i][2])
126     break;
127     timelim = atof(argv[++i])*3600. + .5;
128     break;
129 greg 2.23 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 greg 2.1 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 greg 2.25 case 'R': /* recover */
150     if (argv[i][2])
151     break;
152     rvrlim = 0;
153     /* fall through */
154 greg 2.5 case 'F': /* syncronization file */
155     if (argv[i][2])
156     break;
157 greg 2.28 if ((syncfp =
158     fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
159 greg 2.5 fprintf(stderr, "%s: cannot open\n",
160     argv[i]);
161     exit(1);
162     }
163     continue;
164 greg 2.15 case 'z': /* z-file ist verbotten */
165     fprintf(stderr, "%s: -z option not allowed\n",
166     argv[0]);
167     exit(1);
168 greg 2.1 case 'o': /* output file */
169     if (argv[i][2])
170     break;
171     outfile = argv[++i];
172     continue;
173 greg 2.23 } else if (i >= argc-1)
174     break;
175 greg 2.1 rpargv[rpargc++] = argv[i];
176     }
177 greg 2.23 if (i >= argc) {
178     fprintf(stderr, "%s: missing octree argument\n", argv[0]);
179     exit(1);
180     }
181 greg 2.1 if (outfile == NULL) {
182     fprintf(stderr, "%s: missing output file\n", argv[0]);
183     exit(1);
184     }
185     init(argc, argv);
186     rpiece();
187 greg 2.15 exit(cleanup(0));
188 greg 2.1 }
189    
190    
191 greg 2.25 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 greg 2.28 extern char *sys_errlist[];
197 greg 2.25
198     fls.l_type = ltyp;
199     if (fcntl(fd, F_SETLKW, &fls) < 0) {
200 greg 2.28 fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
201     progname, sys_errlist[errno]);
202 greg 2.25 exit(1);
203     }
204     }
205    
206    
207 greg 2.1 init(ac, av) /* set up output file and start rpict */
208     int ac;
209     char **av;
210     {
211 greg 2.23 static char hrbuf[16], vrbuf[16];
212 greg 2.2 extern char VersionID[];
213 greg 2.1 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 greg 2.25 if (syncfp != NULL) {
222     sflock(F_RDLCK);
223     fscanf(syncfp, "%d %d", &hmult, &vmult);
224     sflock(F_UNLCK);
225 greg 2.5 }
226 greg 2.23 /* compute piece size */
227     hres /= hmult;
228     vres /= vmult;
229 greg 2.1 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
230 greg 2.23 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 greg 2.1 /* open output file */
238     if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
239 greg 2.25 dolock(outfd, F_WRLCK);
240 greg 2.1 if ((fp = fdopen(dup(outfd), "w")) == NULL)
241     goto filerr;
242 greg 2.29 newheader("RADIANCE", fp); /* create header */
243     printargs(ac, av, fp);
244 greg 2.2 fprintf(fp, "SOFTWARE= %s\n", VersionID);
245 greg 2.1 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 greg 2.25 dolock(outfd, F_RDLCK);
255 greg 2.1 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
256     goto filerr;
257 greg 2.13 getheader(fp, NULL, NULL); /* skip header */
258 greg 2.15 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
259 greg 2.1 hr != hres*hmult || vr != vres*vmult) {
260 greg 2.8 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
261     progname, outfile);
262 greg 2.1 exit(1);
263     }
264     } else {
265 greg 2.8 fprintf(stderr, "%s: cannot open file \"%s\"\n",
266     progname, outfile);
267 greg 2.1 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 greg 2.25 dolock(outfd, F_UNLCK);
273 greg 2.1 /* start rpict process */
274     if (open_process(rpd, rpargv) <= 0) {
275 greg 2.3 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
276 greg 2.1 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 greg 2.23 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
285 greg 2.1 fprintf(stderr, "%s: out of memory\n", progname);
286     exit(1);
287     }
288 greg 2.6 signal(SIGALRM, onalrm);
289 greg 2.31 if (timelim)
290     alarm(timelim);
291 greg 2.1 return;
292     filerr:
293 greg 2.8 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
294 greg 2.1 exit(1);
295     }
296    
297    
298     int
299 greg 2.5 nextpiece(xp, yp) /* get next piece assignment */
300     int *xp, *yp;
301     {
302 greg 2.6 if (gotalrm) /* someone wants us to quit */
303     return(0);
304 greg 2.25 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 greg 2.8 *xp = hmult-1;
315     *yp = vmult;
316     }
317 greg 2.25 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 greg 2.8 if (--(*yp) < 0) { /* decrement position */
324 greg 2.5 *yp = vmult-1;
325 greg 2.25 if (--(*xp) < 0) { /* all done */
326     sflock(F_UNLCK);
327 greg 2.5 return(0);
328     }
329     }
330 greg 2.25 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 greg 2.5 return(1);
335     }
336 greg 2.26 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
337 greg 2.5 }
338    
339    
340     int
341 greg 2.25 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 greg 2.30 if (pdone == NULL) {
357     fprintf(stderr, "%s: out of memory\n", progname);
358     exit(1);
359     }
360 greg 2.25 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 greg 2.10 cleanup(rstat) /* close rpict process and clean up */
386     int rstat;
387 greg 2.1 {
388 greg 2.10 int status;
389 greg 2.1
390 greg 2.23 bfree((char *)pbuf, hres*vres*sizeof(COLR));
391 greg 2.1 fclose(torp);
392     fclose(fromrp);
393 greg 2.10 while (wait(&status) != -1)
394 greg 2.9 if (rstat == 0)
395     rstat = status>>8 & 0xff;
396     return(rstat);
397 greg 2.1 }
398    
399    
400     rpiece() /* render picture piece by piece */
401     {
402     VIEW pview;
403     int xorg, yorg;
404 greg 2.11 /* 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 greg 2.32 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 greg 2.11 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 greg 2.5 while (nextpiece(&xorg, &yorg)) {
436 greg 2.11 pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1);
437     pview.voff = ourview.voff + yorg - 0.5*(vmult-1);
438 greg 2.1 fputs(VIEWSTR, torp);
439     fprintview(&pview, torp);
440     putc('\n', torp);
441 greg 2.11 fflush(torp); /* assigns piece to rpict */
442 greg 2.1 putpiece(xorg, yorg); /* place piece in output */
443     }
444     }
445    
446    
447 greg 2.9 int
448 greg 2.1 putpiece(xpos, ypos) /* get next piece from rpict */
449     int xpos, ypos;
450     {
451 greg 2.7 struct flock fls;
452 greg 2.9 int pid, status;
453 greg 2.1 int hr, vr;
454 greg 2.8 register int y;
455     /* check bounds */
456 greg 2.5 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 greg 2.10 exit(cleanup(1));
460 greg 2.5 }
461 greg 2.8 /* check header from rpict */
462 greg 2.18 guard_io();
463 greg 2.13 getheader(fromrp, NULL, NULL);
464 greg 2.15 if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) {
465 greg 2.3 fprintf(stderr, "%s: resolution mismatch from %s\n",
466     progname, rpargv[0]);
467 greg 2.10 exit(cleanup(1));
468 greg 2.1 }
469 greg 2.24 if (verbose) { /* notify caller */
470     printf("%d %d begun\n", xpos, ypos);
471     fflush(stdout);
472     }
473 greg 2.18 unguard();
474 greg 2.8 /* load new piece into buffer */
475 greg 2.18 for (y = 0; y < vr; y++) {
476     guard_io();
477 greg 2.8 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
478 greg 2.3 fprintf(stderr, "%s: read error from %s\n",
479     progname, rpargv[0]);
480 greg 2.10 exit(cleanup(1));
481 greg 2.1 }
482 greg 2.18 unguard();
483     }
484 greg 2.9 #if MAXFORK
485     /* fork so we don't slow rpict down */
486     if ((pid = fork()) > 0) {
487 greg 2.10 if (++nforked >= MAXFORK) {
488 greg 2.9 wait(&status); /* reap a child */
489     if (status)
490 greg 2.10 exit(cleanup(status>>8 & 0xff));
491 greg 2.9 nforked--;
492     }
493     return(pid);
494     }
495     #else
496     pid = -1; /* no forking */
497     #endif
498 greg 2.19 fls.l_start = scanorig +
499     ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
500 greg 2.12 #if NFS
501 greg 2.19 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
502 greg 2.8 /* lock file section so NFS doesn't mess up */
503     fls.l_whence = 0;
504     fls.l_type = F_WRLCK;
505 greg 2.26 if (fcntl(outfd, F_SETLKW, &fls) < 0)
506     filerr("lock");
507 greg 2.12 #endif
508 greg 2.8 /* write new piece to file */
509 greg 2.19 if (lseek(outfd, fls.l_start, 0) == -1)
510 greg 2.26 filerr("seek");
511 greg 2.9 if (hmult == 1) {
512     if (writebuf(outfd, (char *)pbuf,
513     vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
514 greg 2.26 filerr("write");
515 greg 2.9 } else
516     for (y = 0; y < vr; y++) {
517     if (writebuf(outfd, (char *)(pbuf+y*hr),
518     hr*sizeof(COLR)) != hr*sizeof(COLR))
519 greg 2.26 filerr("write");
520 greg 2.9 if (y < vr-1 && lseek(outfd,
521     (long)(hmult-1)*hr*sizeof(COLR),
522     1) == -1)
523 greg 2.26 filerr("seek");
524 greg 2.1 }
525 greg 2.25 #if NFS
526     fls.l_type = F_UNLCK; /* release lock */
527 greg 2.26 if (fcntl(outfd, F_SETLKW, &fls) < 0)
528     filerr("lock");
529 greg 2.25 #endif
530 greg 2.32 if (verbose) { /* notify caller */
531     printf("%d %d done\n", xpos, ypos);
532     fflush(stdout);
533     }
534 greg 2.25 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 greg 2.20 }
542 greg 2.25 if (pid == -1) /* didn't fork or fork failed */
543 greg 2.9 return(0);
544 greg 2.25 _exit(0); /* else exit child process (releasing locks) */
545 greg 2.26 }
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 greg 2.9 _exit(1);
556 greg 2.1 }
557 greg 2.16
558     #endif