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root/radiance/ray/src/util/rtcontrib.c
Revision: 1.17
Committed: Fri Jun 10 16:42:11 2005 UTC (18 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 1.16: +18 -1 lines
Log Message: 
Added rtcontrib -M option to read modifier list from a file

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2 greg 1.17 static const char RCSid[] = "$Id: rtcontrib.c,v 1.16 2005/06/09 18:33:06 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     #define MAXMODLIST 1024 /* maximum modifiers we'll track */
20    
21     int treebufsiz = BUFSIZ; /* current tree buffer size */
22    
23 greg 1.2 typedef double DCOLOR[3]; /* double-precision color */
24    
25 greg 1.1 /*
26     * The modcont structure is used to accumulate ray contributions
27     * for a particular modifier, which may be subdivided into bins
28     * if binv is non-NULL. If outspec contains a %s in it, this will
29     * be replaced with the modifier name. If outspec contains a %d in it,
30     * this will be used to create one output file per bin, otherwise all bins
31     * will be written to the same file, in order. If the global outfmt
32     * is 'c', then a 4-byte RGBE pixel will be output for each bin value
33     * and the file will conform to a RADIANCE image if xres & yres are set.
34     */
35     typedef struct {
36     const char *outspec; /* output file specification */
37     const char *modname; /* modifier name */
38     EPNODE *binv; /* bin value expression */
39     int nbins; /* number of accumulation bins */
40 greg 1.2 DCOLOR cbin[1]; /* contribution bins (extends struct) */
41 greg 1.1 } MODCONT; /* modifier contribution */
42    
43     static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); }
44    
45     LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */
46    
47     /* close output stream */
48     static void closefile(void *p) { fclose((FILE *)p); }
49    
50     LUTAB ofiletab = LU_SINIT(free,closefile); /* output file table */
51    
52 greg 1.14 #define OF_MODIFIER 01
53     #define OF_BIN 02
54    
55 greg 1.1 FILE *getofile(const char *ospec, const char *mname, int bn);
56 greg 1.14 int ofname(char *oname, const char *ospec, const char *mname, int bn);
57     void printheader(FILE *fout, const char *info);
58 greg 1.1
59     /*
60     * The rcont structure is used to manage i/o with a particular
61     * rtrace child process. Input is passed unchanged from stdin,
62     * and output is processed in input order and accumulated according
63     * to the corresponding modifier and bin number.
64     */
65     struct rtproc {
66     struct rtproc *next; /* next in list of processes */
67     SUBPROC pd; /* rtrace pipe descriptors */
68 greg 1.2 unsigned long raynum; /* ray number for this tree */
69     int bsiz; /* ray tree buffer length */
70     char *buf; /* ray tree buffer */
71     int nbr; /* number of bytes from rtrace */
72 greg 1.5 }; /* rtrace process buffer */
73 greg 1.1
74     /* rtrace command and defaults */
75 greg 1.6 char *rtargv[256] = { "rtrace", "-dj", ".5", "-dr", "3",
76 greg 1.13 "-ab", "1", "-ad", "128", };
77     int rtargc = 9;
78 greg 1.1 /* overriding rtrace options */
79 greg 1.6 char *myrtopts[] = { "-o~~TmWdp", "-h-", "-x", "1", "-y", "0",
80     "-dt", "0", "-as", "0", "-aa", "0", NULL };
81 greg 1.1
82     struct rtproc rt0; /* head of rtrace process list */
83    
84     struct rtproc *rt_unproc = NULL; /* unprocessed ray trees */
85    
86     char persistfn[] = "pfXXXXXX"; /* persist file name */
87    
88     int gargc; /* global argc */
89     char **gargv; /* global argv */
90     #define progname gargv[0]
91    
92     char *octree; /* global octree argument */
93    
94     int inpfmt = 'a'; /* input format */
95     int outfmt = 'a'; /* output format */
96    
97     int header = 1; /* output header? */
98     int xres = 0; /* horiz. output resolution */
99     int yres = 0; /* vert. output resolution */
100    
101 greg 1.14 unsigned long raysleft; /* number of rays left to trace */
102 greg 1.1 long waitflush; /* how long until next flush */
103    
104     unsigned long lastray = 0; /* last ray number sent */
105     unsigned long lastdone = 0; /* last ray processed */
106    
107 greg 1.2 int using_stdout = 0; /* are we using stdout? */
108    
109 greg 1.1 const char *modname[MAXMODLIST]; /* ordered modifier name list */
110     int nmods = 0; /* number of modifiers */
111    
112     MODCONT *addmodifier(char *modn, char *outf, char *binv);
113 greg 1.17 void addmodfile(char *fname, char *outf, char *binv);
114 greg 1.1
115 greg 1.5 void init(int np);
116 greg 1.1 int done_rprocs(struct rtproc *rtp);
117 greg 1.14 void recover_output(FILE *fin);
118     void trace_contribs(FILE *fin);
119 greg 1.1 struct rtproc *wait_rproc(void);
120     struct rtproc *get_rproc(void);
121 greg 1.3 void queue_raytree(struct rtproc *rtp);
122     void process_queue(void);
123 greg 1.1
124 greg 1.14 void put_contrib(const DCOLOR cnt, FILE *fout);
125 greg 1.2 void add_contrib(const char *modn);
126 greg 1.1 void done_contrib(void);
127    
128     /* set input/output format */
129     static void
130     setformat(const char *fmt)
131     {
132     switch (fmt[0]) {
133     case 'f':
134     case 'd':
135 greg 1.10 SET_FILE_BINARY(stdin);
136     /* fall through */
137     case 'a':
138 greg 1.1 inpfmt = fmt[0];
139     break;
140     default:
141     goto fmterr;
142     }
143     switch (fmt[1]) {
144     case '\0':
145     outfmt = inpfmt;
146     return;
147     case 'a':
148     case 'f':
149     case 'd':
150     case 'c':
151     outfmt = fmt[1];
152     break;
153     default:
154     goto fmterr;
155     }
156     if (!fmt[2])
157     return;
158     fmterr:
159     sprintf(errmsg, "Illegal i/o format: -f%s", fmt);
160     error(USER, errmsg);
161     }
162    
163     /* gather rays from rtrace and output contributions */
164     int
165     main(int argc, char *argv[])
166     {
167     int nprocs = 1;
168 greg 1.14 int recover = 0;
169 greg 1.1 char *curout = NULL;
170     char *binval = NULL;
171 greg 1.5 char fmt[8];
172 greg 1.2 int i, j;
173     /* global program name */
174 greg 1.1 gargv = argv;
175 greg 1.11 /* initialize calcomp routines */
176 greg 1.1 esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW;
177     esupport &= ~(E_OUTCHAN);
178 greg 1.11 varset("PI", ':', PI);
179 greg 1.1 /* get our options */
180 greg 1.2 for (i = 1; i < argc-1; i++) {
181     /* expand arguments */
182     while ((j = expandarg(&argc, &argv, i)) > 0)
183     ;
184     if (j < 0) {
185     fprintf(stderr, "%s: cannot expand '%s'",
186     argv[0], argv[i]);
187     exit(1);
188     }
189     if (argv[i][0] == '-')
190     switch (argv[i][1]) {
191 greg 1.14 case 'r': /* recover output */
192     if (argv[i][2]) break;
193     recover++;
194     continue;
195 greg 1.2 case 'n': /* number of processes */
196     if (argv[i][2] || i >= argc-1) break;
197     nprocs = atoi(argv[++i]);
198     if (nprocs <= 0)
199     error(USER, "illegal number of processes");
200     continue;
201     case 'h': /* output header? */
202     switch (argv[i][2]) {
203     case '\0':
204     header = !header;
205     continue;
206 greg 1.3 case '+': case '1':
207     case 'T': case 't':
208     case 'Y': case 'y':
209 greg 1.2 header = 1;
210     continue;
211 greg 1.3 case '-': case '0':
212     case 'F': case 'f':
213     case 'N': case 'n':
214 greg 1.2 header = 0;
215     continue;
216     }
217     break;
218     case 'f': /* file or i/o format */
219     if (!argv[i][2]) {
220 greg 1.9 char *fpath;
221 greg 1.2 if (i >= argc-1) break;
222 greg 1.9 fpath = getpath(argv[++i],
223     getrlibpath(), R_OK);
224     if (fpath == NULL) {
225     sprintf(errmsg,
226     "cannot find file '%s'",
227     argv[i]);
228     error(USER, errmsg);
229     }
230     fcompile(fpath);
231 greg 1.2 continue;
232     }
233     setformat(argv[i]+2);
234     continue;
235     case 'e': /* expression */
236     if (argv[i][2] || i >= argc-1) break;
237     scompile(argv[++i], NULL, 0);
238 greg 1.1 continue;
239 greg 1.2 case 'o': /* output file spec. */
240     if (argv[i][2] || i >= argc-1) break;
241     curout = argv[++i];
242 greg 1.1 continue;
243 greg 1.2 case 'x': /* horiz. output resolution */
244     if (argv[i][2] || i >= argc-1) break;
245     xres = atoi(argv[++i]);
246 greg 1.1 continue;
247 greg 1.2 case 'y': /* vert. output resolution */
248     if (argv[i][2] || i >= argc-1) break;
249     yres = atoi(argv[++i]);
250     continue;
251     case 'b': /* bin expression */
252     if (argv[i][2] || i >= argc-1) break;
253     binval = argv[++i];
254     continue;
255     case 'm': /* modifier name */
256     if (argv[i][2] || i >= argc-1) break;
257     rtargv[rtargc++] = "-ti";
258     rtargv[rtargc++] = argv[++i];
259     addmodifier(argv[i], curout, binval);
260 greg 1.1 continue;
261 greg 1.17 case 'M': /* modifier file */
262     if (argv[i][2] || i >= argc-1) break;
263     addmodfile(argv[++i], curout, binval);
264     continue;
265 greg 1.1 }
266 greg 1.2 rtargv[rtargc++] = argv[i]; /* assume rtrace option */
267 greg 1.1 }
268 greg 1.2 /* set global argument list */
269     gargc = argc; gargv = argv;
270 greg 1.1 /* add "mandatory" rtrace settings */
271 greg 1.2 for (j = 0; myrtopts[j] != NULL; j++)
272     rtargv[rtargc++] = myrtopts[j];
273     /* just asking for defaults? */
274     if (!strcmp(argv[i], "-defaults")) {
275 greg 1.1 char sxres[16], syres[16];
276     char *rtpath;
277 greg 1.2 printf("-n %-2d\t\t\t\t# number of processes\n", nprocs);
278 greg 1.1 fflush(stdout); /* report OUR options */
279     rtargv[rtargc++] = header ? "-h+" : "-h-";
280     sprintf(fmt, "-f%c%c", inpfmt, outfmt);
281     rtargv[rtargc++] = fmt;
282     rtargv[rtargc++] = "-x";
283     sprintf(sxres, "%d", xres);
284     rtargv[rtargc++] = sxres;
285     rtargv[rtargc++] = "-y";
286     sprintf(syres, "%d", yres);
287     rtargv[rtargc++] = syres;
288 greg 1.2 rtargv[rtargc++] = "-oTW";
289 greg 1.1 rtargv[rtargc++] = "-defaults";
290     rtargv[rtargc] = NULL;
291     rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
292     if (rtpath == NULL) {
293     eputs(rtargv[0]);
294     eputs(": command not found\n");
295     exit(1);
296     }
297     execv(rtpath, rtargv);
298     perror(rtpath); /* execv() should not return */
299     exit(1);
300 greg 1.5 }
301     if (nprocs > 1) { /* add persist file if parallel */
302 greg 1.2 rtargv[rtargc++] = "-PP";
303     rtargv[rtargc++] = mktemp(persistfn);
304     }
305 greg 1.1 /* add format string */
306     sprintf(fmt, "-f%cf", inpfmt);
307     rtargv[rtargc++] = fmt;
308     /* octree argument is last */
309 greg 1.2 if (i <= 0 || i != argc-1 || argv[i][0] == '-')
310     error(USER, "missing octree argument");
311     rtargv[rtargc++] = octree = argv[i];
312 greg 1.1 rtargv[rtargc] = NULL;
313 greg 1.2 /* start rtrace & compute contributions */
314 greg 1.1 init(nprocs);
315 greg 1.14 if (recover) /* perform recovery if requested */
316     recover_output(stdin);
317 greg 1.5 trace_contribs(stdin);
318 greg 1.1 quit(0);
319     }
320    
321     /* kill persistent rtrace process */
322     static void
323     killpersist(void)
324     {
325     FILE *fp = fopen(persistfn, "r");
326     int pid;
327    
328     if (fp == NULL)
329     return;
330     if (fscanf(fp, "%*s %d", &pid) != 1 || kill(pid, SIGALRM) < 0)
331     unlink(persistfn);
332     fclose(fp);
333     }
334    
335     /* close rtrace processes and clean up */
336     int
337     done_rprocs(struct rtproc *rtp)
338     {
339     int st0, st1 = 0;
340    
341     if (rtp->next != NULL) { /* close last opened first! */
342     st1 = done_rprocs(rtp->next);
343     free((void *)rtp->next);
344     rtp->next = NULL;
345     }
346     st0 = close_process(&rtp->pd);
347     if (st0 < 0)
348     error(WARNING, "unknown return status from rtrace process");
349     else if (st0 > 0)
350     return(st0);
351     return(st1);
352     }
353    
354     /* exit with status */
355     void
356     quit(int status)
357     {
358     int rtstat;
359    
360     if (rt0.next != NULL) /* terminate persistent rtrace */
361     killpersist();
362     /* clean up rtrace process(es) */
363     rtstat = done_rprocs(&rt0);
364     if (status == 0)
365     status = rtstat;
366     exit(status); /* flushes all output streams */
367     }
368    
369 greg 1.5 /* start rtrace processes and initialize */
370 greg 1.1 void
371     init(int np)
372     {
373     struct rtproc *rtp;
374     int i;
375     int maxbytes;
376 greg 1.2 /* make sure we have something to do */
377     if (!nmods)
378     error(USER, "No modifiers specified");
379 greg 1.1 /* assign ray variables */
380     scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0);
381     scompile("Px=$4;Py=$5;Pz=$6;", NULL, 0);
382     /* set up signal handling */
383 greg 1.3 signal(SIGINT, quit);
384     #ifdef SIGHUP
385     signal(SIGHUP, quit);
386     #endif
387     #ifdef SIGTERM
388     signal(SIGTERM, quit);
389     #endif
390     #ifdef SIGPIPE
391 greg 1.1 signal(SIGPIPE, quit);
392     #endif
393     rtp = &rt0; /* start rtrace process(es) */
394     for (i = 0; i++ < np; ) {
395     errno = 0;
396     maxbytes = open_process(&rtp->pd, rtargv);
397     if (maxbytes == 0) {
398     eputs(rtargv[0]);
399     eputs(": command not found\n");
400     exit(1);
401     }
402     if (maxbytes < 0)
403     error(SYSTEM, "cannot start rtrace process");
404     if (maxbytes > treebufsiz)
405     treebufsiz = maxbytes;
406 greg 1.2 rtp->raynum = 0;
407 greg 1.1 rtp->bsiz = 0;
408     rtp->buf = NULL;
409 greg 1.2 rtp->nbr = 0;
410 greg 1.1 if (i == np) /* last process? */
411     break;
412     if (i == 1)
413     sleep(2); /* wait for persist file */
414     rtp->next = (struct rtproc *)malloc(sizeof(struct rtproc));
415     if (rtp->next == NULL)
416     error(SYSTEM, "out of memory in init");
417     rtp = rtp->next;
418     }
419     rtp->next = NULL; /* terminate list */
420     if (yres > 0) {
421     if (xres > 0)
422 greg 1.14 raysleft = (unsigned long)xres*yres;
423 greg 1.1 else
424     raysleft = yres;
425     } else
426     raysleft = 0;
427     waitflush = xres;
428     }
429    
430     /* add modifier to our list to track */
431     MODCONT *
432     addmodifier(char *modn, char *outf, char *binv)
433     {
434     LUENT *lep = lu_find(&modconttab, modn);
435     MODCONT *mp;
436    
437     if (lep->data != NULL) {
438     sprintf(errmsg, "duplicate modifier '%s'", modn);
439     error(USER, errmsg);
440     }
441     if (nmods >= MAXMODLIST)
442     error(USER, "too many modifiers");
443     modname[nmods++] = modn; /* XXX assumes static string */
444     lep->key = modn; /* XXX assumes static string */
445     mp = (MODCONT *)malloc(sizeof(MODCONT));
446     if (mp == NULL)
447     error(SYSTEM, "out of memory in addmodifier");
448     lep->data = (char *)mp;
449     mp->outspec = outf; /* XXX assumes static string */
450     mp->modname = modn; /* XXX assumes static string */
451     if (binv != NULL)
452     mp->binv = eparse(binv);
453     else
454     mp->binv = eparse("0");
455     mp->nbins = 1;
456     setcolor(mp->cbin[0], 0., 0., 0.);
457     return mp;
458     }
459    
460 greg 1.17 /* add modifiers from a file list */
461     void
462     addmodfile(char *fname, char *outf, char *binv)
463     {
464     char *mname[MAXMODLIST];
465     int i;
466     /* load the file & store strings */
467     wordfile(mname, fname);
468     for (i = 0; mname[i]; i++) /* add each one */
469     addmodifier(mname[i], outf, binv);
470     }
471    
472 greg 1.1 /* put string to stderr */
473     void
474     eputs(char *s)
475     {
476     static int midline = 0;
477    
478     if (!*s) return;
479     if (!midline) {
480     fputs(progname, stderr);
481     fputs(": ", stderr);
482     }
483     fputs(s, stderr);
484     midline = s[strlen(s)-1] != '\n';
485     }
486    
487 greg 1.14 /* construct output file name and return flags whether modifier/bin present */
488     int
489     ofname(char *oname, const char *ospec, const char *mname, int bn)
490     {
491     const char *mnp = NULL;
492     const char *bnp = NULL;
493     const char *cp;
494    
495     if (ospec == NULL)
496     return -1;
497     for (cp = ospec; *cp; cp++) /* check format position(s) */
498     if (*cp == '%') {
499     do
500     ++cp;
501     while (isdigit(*cp));
502     switch (*cp) {
503     case '%':
504     break;
505     case 's':
506     if (mnp != NULL)
507     return -1;
508     mnp = cp;
509     break;
510     case 'd':
511     if (bnp != NULL)
512     return -1;
513     bnp = cp;
514     break;
515     default:
516     return -1;
517     }
518     }
519     if (mnp != NULL) { /* create file name */
520     if (bnp != NULL) {
521     if (bnp > mnp)
522     sprintf(oname, ospec, mname, bn);
523     else
524     sprintf(oname, ospec, bn, mname);
525     return OF_MODIFIER|OF_BIN;
526     }
527     sprintf(oname, ospec, mname);
528     return OF_MODIFIER;
529     }
530     if (bnp != NULL) {
531     sprintf(oname, ospec, bn);
532     return OF_BIN;
533     }
534     strcpy(oname, ospec);
535     return 0;
536     }
537    
538 greg 1.1 /* write header to the given output stream */
539     void
540 greg 1.14 printheader(FILE *fout, const char *info)
541 greg 1.1 {
542     extern char VersionID[];
543     FILE *fin = fopen(octree, "r");
544    
545     if (fin == NULL)
546     quit(1);
547 greg 1.2 checkheader(fin, "ignore", fout); /* copy octree header */
548 greg 1.1 fclose(fin);
549     printargs(gargc-1, gargv, fout); /* add our command */
550     fprintf(fout, "SOFTWARE= %s\n", VersionID);
551     fputnow(fout);
552 greg 1.14 if (info != NULL) /* add extra info if given */
553     fputs(info, fout);
554 greg 1.1 switch (outfmt) { /* add output format */
555     case 'a':
556     fputformat("ascii", fout);
557     break;
558     case 'f':
559     fputformat("float", fout);
560     break;
561     case 'd':
562     fputformat("double", fout);
563     break;
564     case 'c':
565     fputformat(COLRFMT, fout);
566     break;
567     }
568     fputc('\n', fout);
569     if (xres > 0) {
570     if (yres > 0) /* resolution string */
571     fprtresolu(xres, yres, fout);
572     fflush(fout);
573     }
574     }
575    
576     /* Get output file pointer (open and write header if new) */
577     FILE *
578     getofile(const char *ospec, const char *mname, int bn)
579     {
580 greg 1.14 int ofl;
581     char oname[1024];
582 greg 1.1 LUENT *lep;
583    
584     if (ospec == NULL) { /* use stdout? */
585 greg 1.10 if (!using_stdout) {
586     if (outfmt != 'a')
587     SET_FILE_BINARY(stdout);
588     if (header)
589 greg 1.14 printheader(stdout, NULL);
590 greg 1.10 }
591 greg 1.1 using_stdout = 1;
592     return stdout;
593     }
594 greg 1.14 ofl = ofname(oname, ospec, mname, bn); /* get output name */
595     if (ofl < 0) {
596     sprintf(errmsg, "bad output format '%s'", ospec);
597     error(USER, errmsg);
598     }
599     lep = lu_find(&ofiletab, oname); /* look it up */
600 greg 1.1 if (lep->key == NULL) /* new entry */
601 greg 1.14 lep->key = strcpy((char *)malloc(strlen(oname)+1), oname);
602 greg 1.1 if (lep->data == NULL) { /* open output file */
603 greg 1.10 FILE *fp;
604 greg 1.2 int i;
605 greg 1.14 if (oname[0] == '!') /* output to command */
606     fp = popen(oname+1, "w");
607 greg 1.10 else
608 greg 1.14 fp = fopen(oname, "w");
609 greg 1.2 if (fp == NULL) {
610 greg 1.14 sprintf(errmsg, "cannot open '%s' for writing", oname);
611 greg 1.1 error(SYSTEM, errmsg);
612     }
613 greg 1.10 if (outfmt != 'a')
614     SET_FILE_BINARY(fp);
615 greg 1.14 if (header) {
616     char info[512];
617     char *cp = info;
618     if (ofl & OF_MODIFIER) {
619     sprintf(cp, "MODIFIER=%s\n", mname);
620     while (*cp) ++cp;
621     }
622     if (ofl & OF_BIN) {
623     sprintf(cp, "BIN=%d\n", bn);
624     while (*cp) ++cp;
625     }
626     *cp = '\0';
627     printheader(fp, info);
628     }
629 greg 1.2 /* play catch-up */
630     for (i = 0; i < lastdone; i++) {
631     static const DCOLOR nocontrib = BLKCOLOR;
632 greg 1.14 put_contrib(nocontrib, fp);
633 greg 1.2 if (outfmt == 'a')
634     putc('\n', fp);
635     }
636     if (xres > 0)
637     fflush(fp);
638     lep->data = (char *)fp;
639 greg 1.1 }
640     return (FILE *)lep->data; /* return open file pointer */
641     }
642    
643     /* read input ray into buffer */
644     int
645     getinp(char *buf, FILE *fp)
646     {
647 greg 1.4 char *cp;
648     int i;
649    
650 greg 1.1 switch (inpfmt) {
651     case 'a':
652 greg 1.4 cp = buf; /* make sure we get 6 floats */
653     for (i = 0; i < 6; i++) {
654     if (fgetword(cp, buf+127-cp, fp) == NULL)
655     return 0;
656     if ((cp = fskip(cp)) == NULL || *cp)
657     return 0;
658     *cp++ = ' ';
659     }
660     getc(fp); /* get/put eol */
661     *cp-- = '\0'; *cp = '\n';
662 greg 1.1 return strlen(buf);
663     case 'f':
664     if (fread(buf, sizeof(float), 6, fp) < 6)
665     return 0;
666     return sizeof(float)*6;
667     case 'd':
668     if (fread(buf, sizeof(double), 6, fp) < 6)
669     return 0;
670     return sizeof(double)*6;
671     }
672     error(INTERNAL, "botched input format");
673     return 0; /* pro forma return */
674     }
675    
676 greg 1.2 static float rparams[9]; /* traced ray parameters */
677 greg 1.1
678     /* return channel (ray) value */
679     double
680     chanvalue(int n)
681     {
682     if (--n < 0 || n >= 6)
683     error(USER, "illegal channel number ($N)");
684 greg 1.2 return rparams[n+3];
685 greg 1.1 }
686    
687 greg 1.2 /* add current ray contribution to the appropriate modifier bin */
688 greg 1.1 void
689 greg 1.2 add_contrib(const char *modn)
690 greg 1.1 {
691     LUENT *le = lu_find(&modconttab, modn);
692     MODCONT *mp = (MODCONT *)le->data;
693     int bn;
694    
695     if (mp == NULL) {
696     sprintf(errmsg, "unexpected modifier '%s' from rtrace", modn);
697     error(USER, errmsg);
698     }
699 greg 1.2 eclock++; /* get bin number */
700 greg 1.1 bn = (int)(evalue(mp->binv) + .5);
701     if (bn <= 0)
702     bn = 0;
703     else if (bn > mp->nbins) { /* new bin */
704     mp = (MODCONT *)realloc(mp, sizeof(MODCONT) +
705 greg 1.2 bn*sizeof(DCOLOR));
706 greg 1.1 if (mp == NULL)
707     error(SYSTEM, "out of memory in add_contrib");
708 greg 1.2 memset(mp->cbin+mp->nbins, 0, sizeof(DCOLOR)*(bn+1-mp->nbins));
709 greg 1.1 mp->nbins = bn+1;
710     le->data = (char *)mp;
711     }
712 greg 1.2 addcolor(mp->cbin[bn], rparams);
713 greg 1.1 }
714    
715     /* output newline to ASCII file and/or flush as requested */
716     static int
717     puteol(const LUENT *e, void *p)
718     {
719     FILE *fp = (FILE *)e->data;
720    
721     if (outfmt == 'a')
722     putc('\n', fp);
723     if (!waitflush)
724     fflush(fp);
725     if (ferror(fp)) {
726     sprintf(errmsg, "write error on file '%s'", e->key);
727     error(SYSTEM, errmsg);
728     }
729     return 0;
730     }
731    
732 greg 1.2 /* put out ray contribution to file */
733     void
734 greg 1.14 put_contrib(const DCOLOR cnt, FILE *fout)
735 greg 1.2 {
736     float fv[3];
737     COLR cv;
738    
739     switch (outfmt) {
740     case 'a':
741     fprintf(fout, "%.6e\t%.6e\t%.6e\t", cnt[0], cnt[1], cnt[2]);
742     break;
743     case 'f':
744     fv[0] = cnt[0];
745     fv[1] = cnt[1];
746     fv[2] = cnt[2];
747     fwrite(fv, sizeof(float), 3, fout);
748     break;
749     case 'd':
750     fwrite(cnt, sizeof(double), 3, fout);
751     break;
752     case 'c':
753     setcolr(cv, cnt[0], cnt[1], cnt[2]);
754     fwrite(cv, sizeof(cv), 1, fout);
755     break;
756     default:
757     error(INTERNAL, "botched output format");
758     }
759     }
760    
761 greg 1.1 /* output ray tallies and clear for next primary */
762     void
763     done_contrib(void)
764     {
765     int i, j;
766     MODCONT *mp;
767 greg 1.14 FILE *fp;
768 greg 1.1 /* output modifiers in order */
769     for (i = 0; i < nmods; i++) {
770     mp = (MODCONT *)lu_find(&modconttab,modname[i])->data;
771 greg 1.12 fp = getofile(mp->outspec, mp->modname, 0);
772 greg 1.14 put_contrib(mp->cbin[0], fp);
773 greg 1.12 if (mp->nbins > 3 && /* minor optimization */
774     fp == getofile(mp->outspec, mp->modname, 1))
775     for (j = 1; j < mp->nbins; j++)
776 greg 1.14 put_contrib(mp->cbin[j], fp);
777 greg 1.12 else
778     for (j = 1; j < mp->nbins; j++)
779 greg 1.14 put_contrib(mp->cbin[j],
780 greg 1.2 getofile(mp->outspec, mp->modname, j));
781 greg 1.1 /* clear for next ray tree */
782 greg 1.2 memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
783 greg 1.1 }
784     --waitflush; /* terminate records */
785     lu_doall(&ofiletab, puteol, NULL);
786 greg 1.2 if (using_stdout & (outfmt == 'a'))
787     putc('\n', stdout);
788     if (!waitflush) {
789 greg 1.1 waitflush = xres;
790 greg 1.2 if (using_stdout)
791     fflush(stdout);
792     }
793 greg 1.1 }
794    
795 greg 1.3 /* queue completed ray tree produced by rtrace process */
796     void
797     queue_raytree(struct rtproc *rtp)
798     {
799     struct rtproc *rtu, *rtl = NULL;
800     /* insert following ray order */
801     for (rtu = rt_unproc; rtu != NULL; rtu = (rtl=rtu)->next)
802     if (rtp->raynum < rtu->raynum)
803     break;
804     rtu = (struct rtproc *)malloc(sizeof(struct rtproc));
805     if (rtu == NULL)
806     error(SYSTEM, "out of memory in queue_raytree");
807     *rtu = *rtp;
808     if (rtl == NULL) {
809     rtu->next = rt_unproc;
810     rt_unproc = rtu;
811     } else {
812     rtu->next = rtl->next;
813     rtl->next = rtu;
814     }
815     rtp->raynum = 0; /* clear path for next ray tree */
816     rtp->bsiz = 0;
817     rtp->buf = NULL;
818     rtp->nbr = 0;
819     }
820    
821     /* process completed ray trees from our queue */
822 greg 1.1 void
823 greg 1.3 process_queue(void)
824 greg 1.1 {
825 greg 1.3 char modname[128];
826     /* ray-ordered queue */
827     while (rt_unproc != NULL && rt_unproc->raynum == lastdone+1) {
828     struct rtproc *rtp = rt_unproc;
829 greg 1.2 int n = rtp->nbr;
830 greg 1.1 const char *cp = rtp->buf;
831     while (n > 0) { /* process rays */
832 greg 1.2 register char *mnp = modname;
833 greg 1.1 /* skip leading tabs */
834     while (n > 0 && *cp == '\t') {
835     cp++; n--;
836     }
837 greg 1.2 if (!n || !(isalpha(*cp) | (*cp == '_')))
838     error(USER, "bad modifier name from rtrace");
839     /* get modifier name */
840 greg 1.1 while (n > 0 && *cp != '\t') {
841     *mnp++ = *cp++; n--;
842     }
843     *mnp = '\0';
844 greg 1.2 cp++; n--; /* eat following tab */
845 greg 1.1 if (n < (int)(sizeof(float)*9))
846     error(USER, "incomplete ray value from rtrace");
847     /* add ray contribution */
848 greg 1.2 memcpy(rparams, cp, sizeof(float)*9);
849 greg 1.1 cp += sizeof(float)*9; n -= sizeof(float)*9;
850 greg 1.2 add_contrib(modname);
851 greg 1.1 }
852     done_contrib(); /* sum up contributions & output */
853     lastdone = rtp->raynum;
854 greg 1.3 free(rtp->buf); /* free up buffer space */
855     rt_unproc = rtp->next;
856     free(rtp); /* done with this ray tree */
857 greg 1.1 }
858     }
859    
860     /* wait for rtrace process to finish with ray tree */
861     struct rtproc *
862     wait_rproc(void)
863     {
864     struct rtproc *rtfree = NULL;
865     fd_set readset, errset;
866     int nr;
867     struct rtproc *rt;
868     int n;
869    
870     do {
871     nr = 0; /* prepare select call */
872     FD_ZERO(&readset); FD_ZERO(&errset); n = 0;
873     for (rt = &rt0; rt != NULL; rt = rt->next) {
874     if (rt->raynum) {
875     FD_SET(rt->pd.r, &readset);
876     ++nr;
877     }
878     FD_SET(rt->pd.r, &errset);
879     if (rt->pd.r >= n)
880     n = rt->pd.r + 1;
881     }
882     if (!nr) /* no rays pending */
883     break;
884     if (nr > 1) { /* call select for multiple proc's */
885     errno = 0;
886     if (select(n, &readset, NULL, &errset, NULL) < 0)
887     error(SYSTEM, "select call error in wait_rproc()");
888     } else
889     FD_ZERO(&errset);
890     nr = 0;
891     for (rt = &rt0; rt != NULL; rt = rt->next) {
892     if (!FD_ISSET(rt->pd.r, &readset) &&
893     !FD_ISSET(rt->pd.r, &errset))
894     continue;
895     if (rt->buf == NULL) {
896     rt->bsiz = treebufsiz;
897     rt->buf = (char *)malloc(treebufsiz);
898 greg 1.2 } else if (rt->nbr + BUFSIZ > rt->bsiz) {
899 greg 1.1 if (rt->bsiz + BUFSIZ <= treebufsiz)
900     rt->bsiz = treebufsiz;
901     else
902     rt->bsiz = treebufsiz += BUFSIZ;
903     rt->buf = (char *)realloc(rt->buf, rt->bsiz);
904     }
905     if (rt->buf == NULL)
906     error(SYSTEM, "out of memory in wait_rproc");
907 greg 1.2 nr = read(rt->pd.r, rt->buf+rt->nbr, rt->bsiz-rt->nbr);
908     if (nr <= 0)
909 greg 1.1 error(USER, "rtrace process died");
910 greg 1.2 rt->nbr += nr; /* advance & check */
911     if (rt->nbr >= 4 && !memcmp(rt->buf+rt->nbr-4,
912     "~\t~\t", 4)) {
913     rt->nbr -= 4; /* elide terminator */
914 greg 1.3 queue_raytree(rt);
915 greg 1.1 rtfree = rt; /* ready for next ray */
916     }
917     }
918     } while ((rtfree == NULL) & (nr > 0)); /* repeat until ready or out */
919     return rtfree;
920     }
921    
922     /* return next available rtrace process */
923     struct rtproc *
924     get_rproc(void)
925     {
926     struct rtproc *rtp;
927     /* check for idle rtrace */
928     for (rtp = &rt0; rtp != NULL; rtp = rtp->next)
929     if (!rtp->raynum)
930     return rtp;
931     return wait_rproc(); /* need to wait for one */
932     }
933    
934     /* trace ray contributions (main loop) */
935     void
936 greg 1.5 trace_contribs(FILE *fin)
937 greg 1.1 {
938     char inpbuf[128];
939     int iblen;
940     struct rtproc *rtp;
941     /* loop over input */
942     while ((iblen = getinp(inpbuf, fin)) > 0) {
943     if (lastray+1 < lastray) { /* counter rollover? */
944     while (wait_rproc() != NULL)
945 greg 1.3 process_queue();
946 greg 1.1 lastdone = lastray = 0;
947     }
948     rtp = get_rproc(); /* get avail. rtrace process */
949 greg 1.3 rtp->raynum = ++lastray; /* assign ray to it */
950 greg 1.1 writebuf(rtp->pd.w, inpbuf, iblen);
951 greg 1.14 if (raysleft && !--raysleft)
952 greg 1.3 break;
953     process_queue(); /* catch up with results */
954 greg 1.1 }
955     while (wait_rproc() != NULL) /* process outstanding rays */
956 greg 1.3 process_queue();
957 greg 1.14 if (raysleft)
958 greg 1.2 error(USER, "unexpected EOF on input");
959 greg 1.14 lu_done(&ofiletab); /* close output files */
960     }
961    
962     /* seek on the given output file */
963     static int
964     myseeko(const LUENT *e, void *p)
965     {
966     if (fseeko((FILE *)e->data, *(off_t *)p, SEEK_CUR) < 0) {
967     sprintf(errmsg, "seek error on file '%s'", e->key);
968     error(SYSTEM, errmsg);
969     }
970     }
971    
972     /* recover output if possible */
973     void
974     recover_output(FILE *fin)
975     {
976     off_t lastout = -1;
977     int outvsiz;
978     char *outvfmt;
979     int i, j;
980     MODCONT *mp;
981     int ofl;
982     char oname[1024];
983     LUENT *ment, *oent;
984     FILE *fp;
985     off_t nvals;
986    
987     switch (outfmt) {
988     case 'a':
989     error(USER, "cannot recover ASCII output");
990     return;
991     case 'f':
992     outvsiz = sizeof(float)*3;
993     outvfmt = "float";
994     break;
995     case 'd':
996     outvsiz = sizeof(double)*3;
997     outvfmt = "double";
998     break;
999     case 'c':
1000     outvsiz = sizeof(COLR);
1001     outvfmt = COLRFMT;
1002     break;
1003     default:
1004     error(INTERNAL, "botched output format");
1005     return;
1006     }
1007     /* check modifier outputs */
1008     for (i = 0; i < nmods; i++) {
1009     ment = lu_find(&modconttab,modname[i]);
1010     mp = (MODCONT *)ment->data;
1011     if (mp->outspec == NULL)
1012     error(USER, "cannot recover from stdout");
1013     for (j = 0; ; j++) { /* check each bin's file */
1014     ofl = ofname(oname, mp->outspec, mp->modname, j);
1015     if (ofl < 0)
1016     error(USER, "bad output file specification");
1017     oent = lu_find(&ofiletab, oname);
1018     if (oent->data != NULL) { /* saw this one already */
1019     if (ofl & OF_BIN)
1020     continue;
1021     break;
1022     }
1023     if (oname[0] == '!')
1024     error(USER, "cannot recover from command");
1025     /* open output */
1026     fp = fopen(oname, "rb+");
1027     if (fp == NULL)
1028     break; /* must be end of modifier */
1029     nvals = lseek(fileno(fp), 0, SEEK_END);
1030     if (nvals <= 0) {
1031     lastout = 0; /* empty output, quit here */
1032     fclose(fp);
1033     break;
1034     }
1035     lseek(fileno(fp), 0, SEEK_SET);
1036     if (header) {
1037     int xr, yr;
1038     if (checkheader(fp, outvfmt, NULL) != 1) {
1039     sprintf(errmsg,
1040     "format mismatch for '%s'",
1041     oname);
1042     error(USER, errmsg);
1043     }
1044     if (xres > 0 && yres > 0 &&
1045     (!fscnresolu(&xr, &yr, fp) ||
1046     xr != xres ||
1047     yr != yres)) {
1048     sprintf(errmsg,
1049     "resolution mismatch for '%s'",
1050     oname);
1051     error(USER, errmsg);
1052     }
1053     }
1054     nvals = (nvals - (off_t)ftell(fp)) / outvsiz;
1055     if (lastout < 0 || nvals < lastout)
1056     lastout = nvals;
1057     if (oent->key == NULL) /* new entry */
1058     oent->key = strcpy((char *)
1059     malloc(strlen(oname)+1), oname);
1060     oent->data = (char *)fp;
1061     if (!(ofl & OF_BIN))
1062     break; /* no bin separation */
1063     }
1064     if (!lastout) { /* empty output */
1065 greg 1.16 error(WARNING, "no previous data to recover");
1066 greg 1.14 lu_done(&ofiletab); /* reclose all outputs */
1067     return;
1068     }
1069     if (j > mp->nbins) { /* preallocate modifier bins */
1070     mp = (MODCONT *)realloc(mp, sizeof(MODCONT) +
1071     (j-1)*sizeof(DCOLOR));
1072     if (mp == NULL)
1073     error(SYSTEM, "out of memory in recover_output");
1074     memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
1075     mp->nbins = j;
1076     ment->data = (char *)mp;
1077     }
1078     }
1079 greg 1.15 if (lastout < 0) {
1080 greg 1.16 error(WARNING, "no output files to recover");
1081 greg 1.15 return;
1082     }
1083 greg 1.14 /* seek on all files */
1084     nvals = lastout * outvsiz;
1085     lu_doall(&ofiletab, myseeko, &nvals);
1086     /* discard input */
1087     for (nvals = 0; nvals < lastout; nvals++)
1088     if (getinp(oname, fin) <= 0)
1089     error(USER, "unexpected EOF on input");
1090     lastray = lastdone = (unsigned long)lastout;
1091     if (raysleft)
1092     raysleft -= lastray;
1093 greg 1.1 }