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root/radiance/ray/src/util/rtcontrib.c
Revision: 1.29
Committed: Wed Oct 5 05:20:21 2005 UTC (18 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 1.28: +17 -2 lines
Log Message: 
Bug fix for some systems where rtrace process gets stuck for unknown reasons

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2 greg 1.29 static const char RCSid[] = "$Id: rtcontrib.c,v 1.28 2005/09/21 17:17:24 greg Exp $";
3 greg 1.1 #endif
4     /*
5     * Gather rtrace output to compute contributions from particular sources
6     */
7    
8 greg 1.4 #include "standard.h"
9 greg 1.1 #include <ctype.h>
10 greg 1.7 #include <signal.h>
11 greg 1.1 #include "platform.h"
12     #include "rtprocess.h"
13     #include "selcall.h"
14     #include "color.h"
15     #include "resolu.h"
16     #include "lookup.h"
17     #include "calcomp.h"
18    
19 greg 1.19 #ifndef MAXMODLIST
20 greg 1.1 #define MAXMODLIST 1024 /* maximum modifiers we'll track */
21 greg 1.19 #endif
22 greg 1.1
23     int treebufsiz = BUFSIZ; /* current tree buffer size */
24    
25 greg 1.2 typedef double DCOLOR[3]; /* double-precision color */
26    
27 greg 1.1 /*
28     * The modcont structure is used to accumulate ray contributions
29     * for a particular modifier, which may be subdivided into bins
30     * if binv is non-NULL. If outspec contains a %s in it, this will
31     * be replaced with the modifier name. If outspec contains a %d in it,
32     * this will be used to create one output file per bin, otherwise all bins
33     * will be written to the same file, in order. If the global outfmt
34     * is 'c', then a 4-byte RGBE pixel will be output for each bin value
35     * and the file will conform to a RADIANCE image if xres & yres are set.
36     */
37     typedef struct {
38     const char *outspec; /* output file specification */
39     const char *modname; /* modifier name */
40     EPNODE *binv; /* bin value expression */
41     int nbins; /* number of accumulation bins */
42 greg 1.2 DCOLOR cbin[1]; /* contribution bins (extends struct) */
43 greg 1.1 } MODCONT; /* modifier contribution */
44    
45     static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); }
46    
47     LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */
48    
49     /* close output stream */
50     static void closefile(void *p) { fclose((FILE *)p); }
51    
52     LUTAB ofiletab = LU_SINIT(free,closefile); /* output file table */
53    
54 greg 1.14 #define OF_MODIFIER 01
55     #define OF_BIN 02
56    
57 greg 1.1 FILE *getofile(const char *ospec, const char *mname, int bn);
58 greg 1.14 int ofname(char *oname, const char *ospec, const char *mname, int bn);
59     void printheader(FILE *fout, const char *info);
60 greg 1.1
61     /*
62     * The rcont structure is used to manage i/o with a particular
63     * rtrace child process. Input is passed unchanged from stdin,
64     * and output is processed in input order and accumulated according
65     * to the corresponding modifier and bin number.
66     */
67     struct rtproc {
68     struct rtproc *next; /* next in list of processes */
69     SUBPROC pd; /* rtrace pipe descriptors */
70 greg 1.2 unsigned long raynum; /* ray number for this tree */
71     int bsiz; /* ray tree buffer length */
72     char *buf; /* ray tree buffer */
73     int nbr; /* number of bytes from rtrace */
74 greg 1.5 }; /* rtrace process buffer */
75 greg 1.1
76     /* rtrace command and defaults */
77 greg 1.18 char *rtargv[256+2*MAXMODLIST] = { "rtrace",
78     "-dj", ".5", "-dr", "3",
79 greg 1.13 "-ab", "1", "-ad", "128", };
80     int rtargc = 9;
81 greg 1.1 /* overriding rtrace options */
82 greg 1.6 char *myrtopts[] = { "-o~~TmWdp", "-h-", "-x", "1", "-y", "0",
83     "-dt", "0", "-as", "0", "-aa", "0", NULL };
84 greg 1.1
85     struct rtproc rt0; /* head of rtrace process list */
86    
87     struct rtproc *rt_unproc = NULL; /* unprocessed ray trees */
88    
89     char persistfn[] = "pfXXXXXX"; /* persist file name */
90    
91     int gargc; /* global argc */
92     char **gargv; /* global argv */
93     #define progname gargv[0]
94    
95     char *octree; /* global octree argument */
96    
97     int inpfmt = 'a'; /* input format */
98     int outfmt = 'a'; /* output format */
99    
100     int header = 1; /* output header? */
101     int xres = 0; /* horiz. output resolution */
102     int yres = 0; /* vert. output resolution */
103    
104 greg 1.14 unsigned long raysleft; /* number of rays left to trace */
105 greg 1.1 long waitflush; /* how long until next flush */
106    
107     unsigned long lastray = 0; /* last ray number sent */
108     unsigned long lastdone = 0; /* last ray processed */
109    
110 greg 1.2 int using_stdout = 0; /* are we using stdout? */
111    
112 greg 1.1 const char *modname[MAXMODLIST]; /* ordered modifier name list */
113     int nmods = 0; /* number of modifiers */
114    
115 greg 1.29 #define queue_length() (lastray - lastdone)
116    
117 greg 1.1 MODCONT *addmodifier(char *modn, char *outf, char *binv);
118 greg 1.17 void addmodfile(char *fname, char *outf, char *binv);
119 greg 1.1
120 greg 1.5 void init(int np);
121 greg 1.1 int done_rprocs(struct rtproc *rtp);
122 greg 1.14 void recover_output(FILE *fin);
123     void trace_contribs(FILE *fin);
124 greg 1.1 struct rtproc *wait_rproc(void);
125     struct rtproc *get_rproc(void);
126 greg 1.3 void queue_raytree(struct rtproc *rtp);
127     void process_queue(void);
128 greg 1.1
129 greg 1.14 void put_contrib(const DCOLOR cnt, FILE *fout);
130 greg 1.2 void add_contrib(const char *modn);
131 greg 1.1 void done_contrib(void);
132    
133 greg 1.29 /* return number of open rtrace processes */
134     static int
135     nrtprocs(void)
136     {
137     int nrtp = 0;
138     struct rtproc *rtp;
139    
140     for (rtp = &rt0; rtp != NULL; rtp = rtp->next)
141     nrtp += rtp->pd.running;
142     return(nrtp);
143     }
144    
145 greg 1.1 /* set input/output format */
146     static void
147     setformat(const char *fmt)
148     {
149     switch (fmt[0]) {
150     case 'f':
151     case 'd':
152 greg 1.10 SET_FILE_BINARY(stdin);
153     /* fall through */
154     case 'a':
155 greg 1.1 inpfmt = fmt[0];
156     break;
157     default:
158     goto fmterr;
159     }
160     switch (fmt[1]) {
161     case '\0':
162     outfmt = inpfmt;
163     return;
164     case 'a':
165     case 'f':
166     case 'd':
167     case 'c':
168     outfmt = fmt[1];
169     break;
170     default:
171     goto fmterr;
172     }
173     if (!fmt[2])
174     return;
175     fmterr:
176     sprintf(errmsg, "Illegal i/o format: -f%s", fmt);
177     error(USER, errmsg);
178     }
179    
180     /* gather rays from rtrace and output contributions */
181     int
182     main(int argc, char *argv[])
183     {
184     int nprocs = 1;
185 greg 1.14 int recover = 0;
186 greg 1.1 char *curout = NULL;
187     char *binval = NULL;
188 greg 1.5 char fmt[8];
189 greg 1.2 int i, j;
190 greg 1.25 /* need at least one argument */
191     if (argc < 2) {
192     fprintf(stderr,
193     "Usage: %s [-n nprocs][-r][-e expr][-f source][-o ospec][-b binv] {-m mod | -M file} [rtrace options] octree\n",
194     argv[0]);
195     exit(1);
196     }
197 greg 1.2 /* global program name */
198 greg 1.1 gargv = argv;
199 greg 1.11 /* initialize calcomp routines */
200 greg 1.1 esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW;
201     esupport &= ~(E_OUTCHAN);
202 greg 1.11 varset("PI", ':', PI);
203 greg 1.1 /* get our options */
204 greg 1.2 for (i = 1; i < argc-1; i++) {
205     /* expand arguments */
206     while ((j = expandarg(&argc, &argv, i)) > 0)
207     ;
208     if (j < 0) {
209     fprintf(stderr, "%s: cannot expand '%s'",
210     argv[0], argv[i]);
211     exit(1);
212     }
213     if (argv[i][0] == '-')
214     switch (argv[i][1]) {
215 greg 1.14 case 'r': /* recover output */
216     if (argv[i][2]) break;
217     recover++;
218     continue;
219 greg 1.2 case 'n': /* number of processes */
220 greg 1.21 if (argv[i][2] || i >= argc-2) break;
221 greg 1.2 nprocs = atoi(argv[++i]);
222     if (nprocs <= 0)
223     error(USER, "illegal number of processes");
224     continue;
225     case 'h': /* output header? */
226     switch (argv[i][2]) {
227     case '\0':
228     header = !header;
229     continue;
230 greg 1.3 case '+': case '1':
231     case 'T': case 't':
232     case 'Y': case 'y':
233 greg 1.2 header = 1;
234     continue;
235 greg 1.3 case '-': case '0':
236     case 'F': case 'f':
237     case 'N': case 'n':
238 greg 1.2 header = 0;
239     continue;
240     }
241     break;
242     case 'f': /* file or i/o format */
243     if (!argv[i][2]) {
244 greg 1.9 char *fpath;
245 greg 1.21 if (i >= argc-2) break;
246 greg 1.9 fpath = getpath(argv[++i],
247     getrlibpath(), R_OK);
248     if (fpath == NULL) {
249     sprintf(errmsg,
250     "cannot find file '%s'",
251     argv[i]);
252     error(USER, errmsg);
253     }
254     fcompile(fpath);
255 greg 1.2 continue;
256     }
257     setformat(argv[i]+2);
258     continue;
259     case 'e': /* expression */
260 greg 1.21 if (argv[i][2] || i >= argc-2) break;
261 greg 1.2 scompile(argv[++i], NULL, 0);
262 greg 1.1 continue;
263 greg 1.2 case 'o': /* output file spec. */
264 greg 1.21 if (argv[i][2] || i >= argc-2) break;
265 greg 1.2 curout = argv[++i];
266 greg 1.1 continue;
267 greg 1.2 case 'x': /* horiz. output resolution */
268 greg 1.21 if (argv[i][2] || i >= argc-2) break;
269 greg 1.2 xres = atoi(argv[++i]);
270 greg 1.1 continue;
271 greg 1.2 case 'y': /* vert. output resolution */
272 greg 1.21 if (argv[i][2] || i >= argc-2) break;
273 greg 1.2 yres = atoi(argv[++i]);
274     continue;
275     case 'b': /* bin expression */
276 greg 1.21 if (argv[i][2] || i >= argc-2) break;
277 greg 1.2 binval = argv[++i];
278     continue;
279     case 'm': /* modifier name */
280 greg 1.21 if (argv[i][2] || i >= argc-2) break;
281 greg 1.2 rtargv[rtargc++] = "-ti";
282     rtargv[rtargc++] = argv[++i];
283     addmodifier(argv[i], curout, binval);
284 greg 1.1 continue;
285 greg 1.17 case 'M': /* modifier file */
286 greg 1.21 if (argv[i][2] || i >= argc-2) break;
287 greg 1.19 rtargv[rtargc++] = "-tI";
288     rtargv[rtargc++] = argv[++i];
289     addmodfile(argv[i], curout, binval);
290 greg 1.17 continue;
291 greg 1.1 }
292 greg 1.2 rtargv[rtargc++] = argv[i]; /* assume rtrace option */
293 greg 1.1 }
294 greg 1.2 /* set global argument list */
295     gargc = argc; gargv = argv;
296 greg 1.1 /* add "mandatory" rtrace settings */
297 greg 1.2 for (j = 0; myrtopts[j] != NULL; j++)
298     rtargv[rtargc++] = myrtopts[j];
299     /* just asking for defaults? */
300     if (!strcmp(argv[i], "-defaults")) {
301 greg 1.1 char sxres[16], syres[16];
302     char *rtpath;
303 greg 1.2 printf("-n %-2d\t\t\t\t# number of processes\n", nprocs);
304 greg 1.1 fflush(stdout); /* report OUR options */
305     rtargv[rtargc++] = header ? "-h+" : "-h-";
306     sprintf(fmt, "-f%c%c", inpfmt, outfmt);
307     rtargv[rtargc++] = fmt;
308     rtargv[rtargc++] = "-x";
309     sprintf(sxres, "%d", xres);
310     rtargv[rtargc++] = sxres;
311     rtargv[rtargc++] = "-y";
312     sprintf(syres, "%d", yres);
313     rtargv[rtargc++] = syres;
314 greg 1.2 rtargv[rtargc++] = "-oTW";
315 greg 1.1 rtargv[rtargc++] = "-defaults";
316     rtargv[rtargc] = NULL;
317     rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
318     if (rtpath == NULL) {
319     eputs(rtargv[0]);
320     eputs(": command not found\n");
321     exit(1);
322     }
323     execv(rtpath, rtargv);
324     perror(rtpath); /* execv() should not return */
325     exit(1);
326 greg 1.5 }
327     if (nprocs > 1) { /* add persist file if parallel */
328 greg 1.2 rtargv[rtargc++] = "-PP";
329     rtargv[rtargc++] = mktemp(persistfn);
330     }
331 greg 1.1 /* add format string */
332     sprintf(fmt, "-f%cf", inpfmt);
333     rtargv[rtargc++] = fmt;
334     /* octree argument is last */
335 greg 1.2 if (i <= 0 || i != argc-1 || argv[i][0] == '-')
336     error(USER, "missing octree argument");
337     rtargv[rtargc++] = octree = argv[i];
338 greg 1.1 rtargv[rtargc] = NULL;
339 greg 1.24 /* start rtrace */
340 greg 1.1 init(nprocs);
341 greg 1.14 if (recover) /* perform recovery if requested */
342     recover_output(stdin);
343 greg 1.24 trace_contribs(stdin); /* compute contributions */
344 greg 1.1 quit(0);
345     }
346    
347 schorsch 1.26 #ifndef SIGALRM
348     #define SIGALRM SIGTERM
349     #endif
350 greg 1.1 /* kill persistent rtrace process */
351     static void
352     killpersist(void)
353     {
354     FILE *fp = fopen(persistfn, "r");
355 schorsch 1.26 RT_PID pid;
356 greg 1.1
357     if (fp == NULL)
358     return;
359     if (fscanf(fp, "%*s %d", &pid) != 1 || kill(pid, SIGALRM) < 0)
360     unlink(persistfn);
361     fclose(fp);
362     }
363    
364     /* close rtrace processes and clean up */
365     int
366     done_rprocs(struct rtproc *rtp)
367     {
368     int st0, st1 = 0;
369    
370     if (rtp->next != NULL) { /* close last opened first! */
371     st1 = done_rprocs(rtp->next);
372     free((void *)rtp->next);
373     rtp->next = NULL;
374     }
375     st0 = close_process(&rtp->pd);
376     if (st0 < 0)
377     error(WARNING, "unknown return status from rtrace process");
378     else if (st0 > 0)
379     return(st0);
380     return(st1);
381     }
382    
383     /* exit with status */
384     void
385     quit(int status)
386     {
387     int rtstat;
388    
389     if (rt0.next != NULL) /* terminate persistent rtrace */
390     killpersist();
391     /* clean up rtrace process(es) */
392     rtstat = done_rprocs(&rt0);
393     if (status == 0)
394     status = rtstat;
395     exit(status); /* flushes all output streams */
396     }
397    
398 greg 1.5 /* start rtrace processes and initialize */
399 greg 1.1 void
400     init(int np)
401     {
402     struct rtproc *rtp;
403     int i;
404     int maxbytes;
405 greg 1.2 /* make sure we have something to do */
406     if (!nmods)
407     error(USER, "No modifiers specified");
408 greg 1.1 /* assign ray variables */
409     scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0);
410     scompile("Px=$4;Py=$5;Pz=$6;", NULL, 0);
411     /* set up signal handling */
412 greg 1.3 signal(SIGINT, quit);
413     #ifdef SIGHUP
414     signal(SIGHUP, quit);
415     #endif
416     #ifdef SIGTERM
417     signal(SIGTERM, quit);
418     #endif
419     #ifdef SIGPIPE
420 greg 1.1 signal(SIGPIPE, quit);
421     #endif
422     rtp = &rt0; /* start rtrace process(es) */
423     for (i = 0; i++ < np; ) {
424     errno = 0;
425     maxbytes = open_process(&rtp->pd, rtargv);
426     if (maxbytes == 0) {
427     eputs(rtargv[0]);
428     eputs(": command not found\n");
429     exit(1);
430     }
431     if (maxbytes < 0)
432     error(SYSTEM, "cannot start rtrace process");
433     if (maxbytes > treebufsiz)
434     treebufsiz = maxbytes;
435 greg 1.2 rtp->raynum = 0;
436 greg 1.1 rtp->bsiz = 0;
437     rtp->buf = NULL;
438 greg 1.2 rtp->nbr = 0;
439 greg 1.1 if (i == np) /* last process? */
440     break;
441     if (i == 1)
442     sleep(2); /* wait for persist file */
443     rtp->next = (struct rtproc *)malloc(sizeof(struct rtproc));
444     if (rtp->next == NULL)
445     error(SYSTEM, "out of memory in init");
446     rtp = rtp->next;
447     }
448     rtp->next = NULL; /* terminate list */
449     if (yres > 0) {
450     if (xres > 0)
451 greg 1.14 raysleft = (unsigned long)xres*yres;
452 greg 1.1 else
453     raysleft = yres;
454     } else
455     raysleft = 0;
456     waitflush = xres;
457     }
458    
459     /* add modifier to our list to track */
460     MODCONT *
461     addmodifier(char *modn, char *outf, char *binv)
462     {
463     LUENT *lep = lu_find(&modconttab, modn);
464     MODCONT *mp;
465    
466     if (lep->data != NULL) {
467     sprintf(errmsg, "duplicate modifier '%s'", modn);
468     error(USER, errmsg);
469     }
470     if (nmods >= MAXMODLIST)
471     error(USER, "too many modifiers");
472     modname[nmods++] = modn; /* XXX assumes static string */
473     lep->key = modn; /* XXX assumes static string */
474     mp = (MODCONT *)malloc(sizeof(MODCONT));
475     if (mp == NULL)
476     error(SYSTEM, "out of memory in addmodifier");
477     lep->data = (char *)mp;
478     mp->outspec = outf; /* XXX assumes static string */
479     mp->modname = modn; /* XXX assumes static string */
480     if (binv != NULL)
481     mp->binv = eparse(binv);
482     else
483     mp->binv = eparse("0");
484     mp->nbins = 1;
485     setcolor(mp->cbin[0], 0., 0., 0.);
486     return mp;
487     }
488    
489 greg 1.17 /* add modifiers from a file list */
490     void
491     addmodfile(char *fname, char *outf, char *binv)
492     {
493     char *mname[MAXMODLIST];
494     int i;
495 greg 1.20 /* find the file & store strings */
496     if (wordfile(mname, getpath(fname, getrlibpath(), R_OK)) < 0) {
497     sprintf(errmsg, "cannot find modifier file '%s'", fname);
498     error(SYSTEM, errmsg);
499     }
500 greg 1.17 for (i = 0; mname[i]; i++) /* add each one */
501     addmodifier(mname[i], outf, binv);
502     }
503    
504 greg 1.1 /* put string to stderr */
505     void
506     eputs(char *s)
507     {
508     static int midline = 0;
509    
510     if (!*s) return;
511     if (!midline) {
512     fputs(progname, stderr);
513     fputs(": ", stderr);
514     }
515     fputs(s, stderr);
516     midline = s[strlen(s)-1] != '\n';
517     }
518    
519 greg 1.14 /* construct output file name and return flags whether modifier/bin present */
520     int
521     ofname(char *oname, const char *ospec, const char *mname, int bn)
522     {
523     const char *mnp = NULL;
524     const char *bnp = NULL;
525     const char *cp;
526    
527     if (ospec == NULL)
528     return -1;
529     for (cp = ospec; *cp; cp++) /* check format position(s) */
530     if (*cp == '%') {
531     do
532     ++cp;
533     while (isdigit(*cp));
534     switch (*cp) {
535     case '%':
536     break;
537     case 's':
538     if (mnp != NULL)
539     return -1;
540     mnp = cp;
541     break;
542     case 'd':
543     if (bnp != NULL)
544     return -1;
545     bnp = cp;
546     break;
547     default:
548     return -1;
549     }
550     }
551     if (mnp != NULL) { /* create file name */
552     if (bnp != NULL) {
553     if (bnp > mnp)
554     sprintf(oname, ospec, mname, bn);
555     else
556     sprintf(oname, ospec, bn, mname);
557     return OF_MODIFIER|OF_BIN;
558     }
559     sprintf(oname, ospec, mname);
560     return OF_MODIFIER;
561     }
562     if (bnp != NULL) {
563     sprintf(oname, ospec, bn);
564     return OF_BIN;
565     }
566     strcpy(oname, ospec);
567     return 0;
568     }
569    
570 greg 1.1 /* write header to the given output stream */
571     void
572 greg 1.14 printheader(FILE *fout, const char *info)
573 greg 1.1 {
574     extern char VersionID[];
575     FILE *fin = fopen(octree, "r");
576    
577     if (fin == NULL)
578     quit(1);
579 greg 1.2 checkheader(fin, "ignore", fout); /* copy octree header */
580 greg 1.1 fclose(fin);
581     printargs(gargc-1, gargv, fout); /* add our command */
582     fprintf(fout, "SOFTWARE= %s\n", VersionID);
583     fputnow(fout);
584 greg 1.14 if (info != NULL) /* add extra info if given */
585     fputs(info, fout);
586 greg 1.1 switch (outfmt) { /* add output format */
587     case 'a':
588     fputformat("ascii", fout);
589     break;
590     case 'f':
591     fputformat("float", fout);
592     break;
593     case 'd':
594     fputformat("double", fout);
595     break;
596     case 'c':
597     fputformat(COLRFMT, fout);
598     break;
599     }
600     fputc('\n', fout);
601     if (xres > 0) {
602     if (yres > 0) /* resolution string */
603     fprtresolu(xres, yres, fout);
604     fflush(fout);
605     }
606     }
607    
608     /* Get output file pointer (open and write header if new) */
609     FILE *
610     getofile(const char *ospec, const char *mname, int bn)
611     {
612 greg 1.14 int ofl;
613     char oname[1024];
614 greg 1.1 LUENT *lep;
615    
616     if (ospec == NULL) { /* use stdout? */
617 greg 1.10 if (!using_stdout) {
618     if (outfmt != 'a')
619     SET_FILE_BINARY(stdout);
620     if (header)
621 greg 1.14 printheader(stdout, NULL);
622 greg 1.10 }
623 greg 1.1 using_stdout = 1;
624     return stdout;
625     }
626 greg 1.14 ofl = ofname(oname, ospec, mname, bn); /* get output name */
627     if (ofl < 0) {
628     sprintf(errmsg, "bad output format '%s'", ospec);
629     error(USER, errmsg);
630     }
631     lep = lu_find(&ofiletab, oname); /* look it up */
632 greg 1.1 if (lep->key == NULL) /* new entry */
633 greg 1.14 lep->key = strcpy((char *)malloc(strlen(oname)+1), oname);
634 greg 1.1 if (lep->data == NULL) { /* open output file */
635 greg 1.10 FILE *fp;
636 greg 1.2 int i;
637 greg 1.14 if (oname[0] == '!') /* output to command */
638     fp = popen(oname+1, "w");
639 greg 1.10 else
640 greg 1.14 fp = fopen(oname, "w");
641 greg 1.2 if (fp == NULL) {
642 greg 1.14 sprintf(errmsg, "cannot open '%s' for writing", oname);
643 greg 1.1 error(SYSTEM, errmsg);
644     }
645 greg 1.10 if (outfmt != 'a')
646     SET_FILE_BINARY(fp);
647 greg 1.14 if (header) {
648     char info[512];
649     char *cp = info;
650 greg 1.22 sprintf(cp, "MODIFIER=%s\n", mname);
651     while (*cp) ++cp;
652 greg 1.14 if (ofl & OF_BIN) {
653     sprintf(cp, "BIN=%d\n", bn);
654     while (*cp) ++cp;
655     }
656     *cp = '\0';
657     printheader(fp, info);
658     }
659 greg 1.2 /* play catch-up */
660     for (i = 0; i < lastdone; i++) {
661     static const DCOLOR nocontrib = BLKCOLOR;
662 greg 1.14 put_contrib(nocontrib, fp);
663 greg 1.2 if (outfmt == 'a')
664     putc('\n', fp);
665     }
666     if (xres > 0)
667     fflush(fp);
668     lep->data = (char *)fp;
669 greg 1.1 }
670     return (FILE *)lep->data; /* return open file pointer */
671     }
672    
673     /* read input ray into buffer */
674     int
675     getinp(char *buf, FILE *fp)
676     {
677 greg 1.4 char *cp;
678     int i;
679    
680 greg 1.1 switch (inpfmt) {
681     case 'a':
682 greg 1.4 cp = buf; /* make sure we get 6 floats */
683     for (i = 0; i < 6; i++) {
684     if (fgetword(cp, buf+127-cp, fp) == NULL)
685     return 0;
686     if ((cp = fskip(cp)) == NULL || *cp)
687     return 0;
688     *cp++ = ' ';
689     }
690     getc(fp); /* get/put eol */
691     *cp-- = '\0'; *cp = '\n';
692 greg 1.1 return strlen(buf);
693     case 'f':
694     if (fread(buf, sizeof(float), 6, fp) < 6)
695     return 0;
696     return sizeof(float)*6;
697     case 'd':
698     if (fread(buf, sizeof(double), 6, fp) < 6)
699     return 0;
700     return sizeof(double)*6;
701     }
702     error(INTERNAL, "botched input format");
703     return 0; /* pro forma return */
704     }
705    
706 greg 1.2 static float rparams[9]; /* traced ray parameters */
707 greg 1.1
708     /* return channel (ray) value */
709     double
710     chanvalue(int n)
711     {
712     if (--n < 0 || n >= 6)
713     error(USER, "illegal channel number ($N)");
714 greg 1.2 return rparams[n+3];
715 greg 1.1 }
716    
717 greg 1.2 /* add current ray contribution to the appropriate modifier bin */
718 greg 1.1 void
719 greg 1.2 add_contrib(const char *modn)
720 greg 1.1 {
721     LUENT *le = lu_find(&modconttab, modn);
722     MODCONT *mp = (MODCONT *)le->data;
723     int bn;
724    
725     if (mp == NULL) {
726     sprintf(errmsg, "unexpected modifier '%s' from rtrace", modn);
727     error(USER, errmsg);
728     }
729 greg 1.2 eclock++; /* get bin number */
730 greg 1.1 bn = (int)(evalue(mp->binv) + .5);
731     if (bn <= 0)
732     bn = 0;
733 greg 1.27 else if (bn >= mp->nbins) { /* new bin */
734 greg 1.1 mp = (MODCONT *)realloc(mp, sizeof(MODCONT) +
735 greg 1.2 bn*sizeof(DCOLOR));
736 greg 1.1 if (mp == NULL)
737     error(SYSTEM, "out of memory in add_contrib");
738 greg 1.2 memset(mp->cbin+mp->nbins, 0, sizeof(DCOLOR)*(bn+1-mp->nbins));
739 greg 1.1 mp->nbins = bn+1;
740     le->data = (char *)mp;
741     }
742 greg 1.2 addcolor(mp->cbin[bn], rparams);
743 greg 1.1 }
744    
745     /* output newline to ASCII file and/or flush as requested */
746     static int
747     puteol(const LUENT *e, void *p)
748     {
749     FILE *fp = (FILE *)e->data;
750    
751     if (outfmt == 'a')
752     putc('\n', fp);
753     if (!waitflush)
754     fflush(fp);
755     if (ferror(fp)) {
756     sprintf(errmsg, "write error on file '%s'", e->key);
757     error(SYSTEM, errmsg);
758     }
759     return 0;
760     }
761    
762 greg 1.2 /* put out ray contribution to file */
763     void
764 greg 1.14 put_contrib(const DCOLOR cnt, FILE *fout)
765 greg 1.2 {
766     float fv[3];
767     COLR cv;
768    
769     switch (outfmt) {
770     case 'a':
771     fprintf(fout, "%.6e\t%.6e\t%.6e\t", cnt[0], cnt[1], cnt[2]);
772     break;
773     case 'f':
774     fv[0] = cnt[0];
775     fv[1] = cnt[1];
776     fv[2] = cnt[2];
777     fwrite(fv, sizeof(float), 3, fout);
778     break;
779     case 'd':
780     fwrite(cnt, sizeof(double), 3, fout);
781     break;
782     case 'c':
783     setcolr(cv, cnt[0], cnt[1], cnt[2]);
784     fwrite(cv, sizeof(cv), 1, fout);
785     break;
786     default:
787     error(INTERNAL, "botched output format");
788     }
789     }
790    
791 greg 1.1 /* output ray tallies and clear for next primary */
792     void
793     done_contrib(void)
794     {
795     int i, j;
796     MODCONT *mp;
797 greg 1.14 FILE *fp;
798 greg 1.1 /* output modifiers in order */
799     for (i = 0; i < nmods; i++) {
800     mp = (MODCONT *)lu_find(&modconttab,modname[i])->data;
801 greg 1.12 fp = getofile(mp->outspec, mp->modname, 0);
802 greg 1.14 put_contrib(mp->cbin[0], fp);
803 greg 1.12 if (mp->nbins > 3 && /* minor optimization */
804     fp == getofile(mp->outspec, mp->modname, 1))
805     for (j = 1; j < mp->nbins; j++)
806 greg 1.14 put_contrib(mp->cbin[j], fp);
807 greg 1.12 else
808     for (j = 1; j < mp->nbins; j++)
809 greg 1.14 put_contrib(mp->cbin[j],
810 greg 1.2 getofile(mp->outspec, mp->modname, j));
811 greg 1.1 /* clear for next ray tree */
812 greg 1.2 memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
813 greg 1.1 }
814     --waitflush; /* terminate records */
815     lu_doall(&ofiletab, puteol, NULL);
816 greg 1.2 if (using_stdout & (outfmt == 'a'))
817     putc('\n', stdout);
818     if (!waitflush) {
819 greg 1.1 waitflush = xres;
820 greg 1.2 if (using_stdout)
821     fflush(stdout);
822     }
823 greg 1.1 }
824    
825 greg 1.3 /* queue completed ray tree produced by rtrace process */
826     void
827     queue_raytree(struct rtproc *rtp)
828     {
829     struct rtproc *rtu, *rtl = NULL;
830     /* insert following ray order */
831     for (rtu = rt_unproc; rtu != NULL; rtu = (rtl=rtu)->next)
832     if (rtp->raynum < rtu->raynum)
833     break;
834     rtu = (struct rtproc *)malloc(sizeof(struct rtproc));
835     if (rtu == NULL)
836     error(SYSTEM, "out of memory in queue_raytree");
837     *rtu = *rtp;
838     if (rtl == NULL) {
839     rtu->next = rt_unproc;
840     rt_unproc = rtu;
841     } else {
842     rtu->next = rtl->next;
843     rtl->next = rtu;
844     }
845     rtp->raynum = 0; /* clear path for next ray tree */
846     rtp->bsiz = 0;
847     rtp->buf = NULL;
848     rtp->nbr = 0;
849     }
850    
851     /* process completed ray trees from our queue */
852 greg 1.1 void
853 greg 1.3 process_queue(void)
854 greg 1.1 {
855 greg 1.3 char modname[128];
856     /* ray-ordered queue */
857     while (rt_unproc != NULL && rt_unproc->raynum == lastdone+1) {
858     struct rtproc *rtp = rt_unproc;
859 greg 1.2 int n = rtp->nbr;
860 greg 1.1 const char *cp = rtp->buf;
861     while (n > 0) { /* process rays */
862 greg 1.2 register char *mnp = modname;
863 greg 1.1 /* skip leading tabs */
864     while (n > 0 && *cp == '\t') {
865     cp++; n--;
866     }
867 greg 1.2 if (!n || !(isalpha(*cp) | (*cp == '_')))
868     error(USER, "bad modifier name from rtrace");
869     /* get modifier name */
870 greg 1.1 while (n > 0 && *cp != '\t') {
871     *mnp++ = *cp++; n--;
872     }
873     *mnp = '\0';
874 greg 1.2 cp++; n--; /* eat following tab */
875 greg 1.1 if (n < (int)(sizeof(float)*9))
876     error(USER, "incomplete ray value from rtrace");
877     /* add ray contribution */
878 greg 1.2 memcpy(rparams, cp, sizeof(float)*9);
879 greg 1.1 cp += sizeof(float)*9; n -= sizeof(float)*9;
880 greg 1.2 add_contrib(modname);
881 greg 1.1 }
882     done_contrib(); /* sum up contributions & output */
883     lastdone = rtp->raynum;
884 greg 1.3 free(rtp->buf); /* free up buffer space */
885     rt_unproc = rtp->next;
886     free(rtp); /* done with this ray tree */
887 greg 1.1 }
888     }
889    
890     /* wait for rtrace process to finish with ray tree */
891     struct rtproc *
892     wait_rproc(void)
893     {
894     struct rtproc *rtfree = NULL;
895     fd_set readset, errset;
896     int nr;
897     struct rtproc *rt;
898     int n;
899    
900     do {
901     nr = 0; /* prepare select call */
902     FD_ZERO(&readset); FD_ZERO(&errset); n = 0;
903     for (rt = &rt0; rt != NULL; rt = rt->next) {
904     if (rt->raynum) {
905     FD_SET(rt->pd.r, &readset);
906     ++nr;
907     }
908     FD_SET(rt->pd.r, &errset);
909     if (rt->pd.r >= n)
910     n = rt->pd.r + 1;
911     }
912     if (!nr) /* no rays pending */
913     break;
914     if (nr > 1) { /* call select for multiple proc's */
915     errno = 0;
916     if (select(n, &readset, NULL, &errset, NULL) < 0)
917     error(SYSTEM, "select call error in wait_rproc()");
918     } else
919     FD_ZERO(&errset);
920     nr = 0;
921     for (rt = &rt0; rt != NULL; rt = rt->next) {
922     if (!FD_ISSET(rt->pd.r, &readset) &&
923     !FD_ISSET(rt->pd.r, &errset))
924     continue;
925     if (rt->buf == NULL) {
926     rt->bsiz = treebufsiz;
927     rt->buf = (char *)malloc(treebufsiz);
928 greg 1.2 } else if (rt->nbr + BUFSIZ > rt->bsiz) {
929 greg 1.1 if (rt->bsiz + BUFSIZ <= treebufsiz)
930     rt->bsiz = treebufsiz;
931     else
932 greg 1.28 treebufsiz = rt->bsiz += BUFSIZ;
933 greg 1.1 rt->buf = (char *)realloc(rt->buf, rt->bsiz);
934     }
935     if (rt->buf == NULL)
936     error(SYSTEM, "out of memory in wait_rproc");
937 greg 1.2 nr = read(rt->pd.r, rt->buf+rt->nbr, rt->bsiz-rt->nbr);
938     if (nr <= 0)
939 greg 1.1 error(USER, "rtrace process died");
940 greg 1.2 rt->nbr += nr; /* advance & check */
941     if (rt->nbr >= 4 && !memcmp(rt->buf+rt->nbr-4,
942     "~\t~\t", 4)) {
943     rt->nbr -= 4; /* elide terminator */
944 greg 1.3 queue_raytree(rt);
945 greg 1.1 rtfree = rt; /* ready for next ray */
946     }
947     }
948     } while ((rtfree == NULL) & (nr > 0)); /* repeat until ready or out */
949     return rtfree;
950     }
951    
952     /* return next available rtrace process */
953     struct rtproc *
954     get_rproc(void)
955     {
956     struct rtproc *rtp;
957     /* check for idle rtrace */
958     for (rtp = &rt0; rtp != NULL; rtp = rtp->next)
959     if (!rtp->raynum)
960     return rtp;
961     return wait_rproc(); /* need to wait for one */
962     }
963    
964     /* trace ray contributions (main loop) */
965     void
966 greg 1.5 trace_contribs(FILE *fin)
967 greg 1.1 {
968     char inpbuf[128];
969     int iblen;
970     struct rtproc *rtp;
971     /* loop over input */
972     while ((iblen = getinp(inpbuf, fin)) > 0) {
973 greg 1.29 if (lastray+1 < lastray || /* need reset? */
974     queue_length() > 5*nrtprocs()) {
975 greg 1.1 while (wait_rproc() != NULL)
976 greg 1.3 process_queue();
977 greg 1.1 lastdone = lastray = 0;
978     }
979     rtp = get_rproc(); /* get avail. rtrace process */
980 greg 1.3 rtp->raynum = ++lastray; /* assign ray to it */
981 greg 1.1 writebuf(rtp->pd.w, inpbuf, iblen);
982 greg 1.14 if (raysleft && !--raysleft)
983 greg 1.3 break;
984     process_queue(); /* catch up with results */
985 greg 1.1 }
986     while (wait_rproc() != NULL) /* process outstanding rays */
987 greg 1.3 process_queue();
988 greg 1.14 if (raysleft)
989 greg 1.2 error(USER, "unexpected EOF on input");
990 greg 1.14 lu_done(&ofiletab); /* close output files */
991     }
992    
993     /* seek on the given output file */
994     static int
995     myseeko(const LUENT *e, void *p)
996     {
997     if (fseeko((FILE *)e->data, *(off_t *)p, SEEK_CUR) < 0) {
998     sprintf(errmsg, "seek error on file '%s'", e->key);
999     error(SYSTEM, errmsg);
1000     }
1001     }
1002    
1003     /* recover output if possible */
1004     void
1005     recover_output(FILE *fin)
1006     {
1007     off_t lastout = -1;
1008     int outvsiz;
1009     char *outvfmt;
1010     int i, j;
1011     MODCONT *mp;
1012     int ofl;
1013     char oname[1024];
1014     LUENT *ment, *oent;
1015     FILE *fp;
1016     off_t nvals;
1017    
1018     switch (outfmt) {
1019     case 'a':
1020     error(USER, "cannot recover ASCII output");
1021     return;
1022     case 'f':
1023     outvsiz = sizeof(float)*3;
1024     outvfmt = "float";
1025     break;
1026     case 'd':
1027     outvsiz = sizeof(double)*3;
1028     outvfmt = "double";
1029     break;
1030     case 'c':
1031     outvsiz = sizeof(COLR);
1032     outvfmt = COLRFMT;
1033     break;
1034     default:
1035     error(INTERNAL, "botched output format");
1036     return;
1037     }
1038     /* check modifier outputs */
1039     for (i = 0; i < nmods; i++) {
1040     ment = lu_find(&modconttab,modname[i]);
1041     mp = (MODCONT *)ment->data;
1042     if (mp->outspec == NULL)
1043     error(USER, "cannot recover from stdout");
1044     for (j = 0; ; j++) { /* check each bin's file */
1045     ofl = ofname(oname, mp->outspec, mp->modname, j);
1046     if (ofl < 0)
1047     error(USER, "bad output file specification");
1048     oent = lu_find(&ofiletab, oname);
1049     if (oent->data != NULL) { /* saw this one already */
1050     if (ofl & OF_BIN)
1051     continue;
1052     break;
1053     }
1054     if (oname[0] == '!')
1055     error(USER, "cannot recover from command");
1056     /* open output */
1057     fp = fopen(oname, "rb+");
1058 greg 1.23 if (fp == NULL) {
1059     if (j)
1060     break; /* assume end of modifier */
1061     sprintf(errmsg, "missing recover file '%s'",
1062     oname);
1063     error(USER, errmsg);
1064     }
1065 greg 1.14 nvals = lseek(fileno(fp), 0, SEEK_END);
1066     if (nvals <= 0) {
1067     lastout = 0; /* empty output, quit here */
1068     fclose(fp);
1069     break;
1070     }
1071     lseek(fileno(fp), 0, SEEK_SET);
1072     if (header) {
1073     int xr, yr;
1074     if (checkheader(fp, outvfmt, NULL) != 1) {
1075     sprintf(errmsg,
1076     "format mismatch for '%s'",
1077     oname);
1078     error(USER, errmsg);
1079     }
1080     if (xres > 0 && yres > 0 &&
1081     (!fscnresolu(&xr, &yr, fp) ||
1082     xr != xres ||
1083     yr != yres)) {
1084     sprintf(errmsg,
1085     "resolution mismatch for '%s'",
1086     oname);
1087     error(USER, errmsg);
1088     }
1089     }
1090     nvals = (nvals - (off_t)ftell(fp)) / outvsiz;
1091     if (lastout < 0 || nvals < lastout)
1092     lastout = nvals;
1093     if (oent->key == NULL) /* new entry */
1094     oent->key = strcpy((char *)
1095     malloc(strlen(oname)+1), oname);
1096     oent->data = (char *)fp;
1097     if (!(ofl & OF_BIN))
1098     break; /* no bin separation */
1099     }
1100     if (!lastout) { /* empty output */
1101 greg 1.16 error(WARNING, "no previous data to recover");
1102 greg 1.14 lu_done(&ofiletab); /* reclose all outputs */
1103     return;
1104     }
1105     if (j > mp->nbins) { /* preallocate modifier bins */
1106     mp = (MODCONT *)realloc(mp, sizeof(MODCONT) +
1107     (j-1)*sizeof(DCOLOR));
1108     if (mp == NULL)
1109     error(SYSTEM, "out of memory in recover_output");
1110     memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
1111     mp->nbins = j;
1112     ment->data = (char *)mp;
1113     }
1114     }
1115 greg 1.15 if (lastout < 0) {
1116 greg 1.16 error(WARNING, "no output files to recover");
1117 greg 1.15 return;
1118     }
1119 greg 1.24 if (raysleft && lastout >= raysleft) {
1120     error(WARNING, "output appears to be complete");
1121     /* XXX should read & discard input? */
1122     quit(0);
1123     }
1124 greg 1.14 /* seek on all files */
1125     nvals = lastout * outvsiz;
1126     lu_doall(&ofiletab, myseeko, &nvals);
1127 greg 1.28 /* skip repeated input */
1128 greg 1.14 for (nvals = 0; nvals < lastout; nvals++)
1129     if (getinp(oname, fin) <= 0)
1130     error(USER, "unexpected EOF on input");
1131     lastray = lastdone = (unsigned long)lastout;
1132     if (raysleft)
1133     raysleft -= lastray;
1134 greg 1.1 }