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root/radiance/ray/src/util/rtcontrib.c

Comparing ray/src/util/rtcontrib.c (file contents):
Revision 1.12 by greg, Fri Jun 3 14:29:42 2005 UTC vs.
Revision 1.67 by greg, Tue Apr 10 05:16:50 2012 UTC

#	Line 5 | Line 5 | static const char RCSid[] = "$Id$";
5		* Gather rtrace output to compute contributions from particular sources
6		*/
7
8	+	/*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
9	+	Need to refactor code by forking a subprocess for each
10	+	rtrace call to take output and accumulate it into bins
11	+	for the parent process.  This will avoid our current
12	+	bottleneck around processing output queues, computing
13	+	bins and the associated buffer growth, which can be crazy
14	+	(gigabytes/subprocess).  Each child process will return
15	+	a ray number and a fully computed and ready-to-output
16	+	record of modifiers and their summed bins.  These will
17	+	be queued and sorted by the parent for ordered output.
18	+	XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX*/
19	+
20		#include  "standard.h"
21		#include  <ctype.h>
22		#include  <signal.h>
#	Line 16 | Line 28 | static const char RCSid[] = "$Id$";
28		#include  "lookup.h"
29		#include  "calcomp.h"
30
31	+	#ifdef _WIN32
32	+	typedef int     ssize_t;
33	+	#endif
34	+
35	+	#ifndef MAXMODLIST
36		#define MAXMODLIST      1024            /* maximum modifiers we'll track */
37	+	#endif
38
39	<	int     treebufsiz = BUFSIZ;            /* current tree buffer size */
39	>	ssize_t treebufsiz = BUFSIZ;            /* current tree buffer size */
40
41		typedef double  DCOLOR[3];              /* double-precision color */
42
43		/*
44	<	* The modcont structure is used to accumulate ray contributions
44	>	* The MODCONT structure is used to accumulate ray contributions
45		* for a particular modifier, which may be subdivided into bins
46	<	* if binv is non-NULL.  If outspec contains a %s in it, this will
46	>	* if binv evaluates > 0.  If outspec contains a %s in it, this will
47		* be replaced with the modifier name.  If outspec contains a %d in it,
48		* this will be used to create one output file per bin, otherwise all bins
49		* will be written to the same file, in order.  If the global outfmt
#	Line 44 | Line 62 | static void mcfree(void *p) { epfree((*(MODCONT *)p).b
62
63		LUTAB   modconttab = LU_SINIT(NULL,mcfree);     /* modifier lookup table */
64
65	<	/* close output stream */
66	<	static void closefile(void *p) { fclose((FILE *)p); }
65	>	/*
66	>	* The STREAMOUT structure holds an open FILE pointer and a count of
67	>	* the number of RGB triplets per record, or 0 if unknown.
68	>	*/
69	>	typedef struct {
70	>	FILE            *ofp;           /* output file pointer */
71	>	int             outpipe;        /* output is to a pipe */
72	>	int             reclen;         /* triplets/record */
73	>	int             xr, yr;         /* output resolution for picture */
74	>	} STREAMOUT;
75
76	<	LUTAB   ofiletab = LU_SINIT(free,closefile);    /* output file table */
76	>	/* close output stream and free record */
77	>	static void
78	>	closestream(void *p)
79	>	{
80	>	STREAMOUT       *sop = (STREAMOUT *)p;
81	>	int             status;
82	>	if (sop->outpipe)
83	>	status = pclose(sop->ofp);
84	>	else
85	>	status = fclose(sop->ofp);
86	>	if (status)
87	>	error(SYSTEM, "error closing output stream");
88	>	free(p);
89	>	}
90
91	<	FILE *getofile(const char *ospec, const char *mname, int bn);
91	>	LUTAB   ofiletab = LU_SINIT(free,closestream);  /* output file table */
92
93	+	#define OF_MODIFIER     01
94	+	#define OF_BIN          02
95	+
96	+	STREAMOUT *getostream(const char *ospec, const char *mname, int bn, int noopen);
97	+	int ofname(char *oname, const char *ospec, const char *mname, int bn);
98	+	void printheader(FILE *fout, const char *info);
99	+	void printresolu(FILE *fout, int xr, int yr);
100	+
101		/*
102		* The rcont structure is used to manage i/o with a particular
103		* rtrace child process.  Input is passed unchanged from stdin,
#	Line 61 | Line 108 | struct rtproc {
108		struct rtproc   *next;          /* next in list of processes */
109		SUBPROC         pd;             /* rtrace pipe descriptors */
110		unsigned long   raynum;         /* ray number for this tree */
111	<	int             bsiz;           /* ray tree buffer length */
111	>	size_t          bsiz;           /* ray tree buffer length */
112		char            *buf;           /* ray tree buffer */
113	<	int             nbr;            /* number of bytes from rtrace */
113	>	size_t          nbr;            /* number of bytes from rtrace */
114		};                              /* rtrace process buffer */
115
116		/* rtrace command and defaults */
117	<	char            *rtargv[256] = { "rtrace", "-dj", ".5", "-dr", "3",
118	<	"-ab", "1", "-ad", "128", "-lr", "-10", };
119	<	int  rtargc = 11;
117	>	char            *rtargv[256+2*MAXMODLIST] = { "rtrace",
118	>	"-dj", ".9", "-dr", "3",
119	>	"-ab", "1", "-ad", "350", };
120	>
121	>	int  rtargc = 9;
122		/* overriding rtrace options */
123	<	char            *myrtopts[] = { "-o~~TmWdp", "-h-", "-x", "1", "-y", "0",
123	>	char            *myrtopts[] = { "-h-", "-x", "1", "-y", "0",
124		"-dt", "0", "-as", "0", "-aa", "0", NULL };
125
126	+	#define RTCOEFF         "-o~~~TmWdp"    /* compute coefficients only */
127	+	#define RTCONTRIB       "-o~~~TmVdp"    /* compute ray contributions */
128	+
129		struct rtproc   rt0;                    /* head of rtrace process list */
130
131		struct rtproc   *rt_unproc = NULL;      /* unprocessed ray trees */
132
133	<	char    persistfn[] = "pfXXXXXX";       /* persist file name */
133	>	#define PERSIST_NONE    0               /* no persist file */
134	>	#define PERSIST_SINGLE  1               /* user set -P persist */
135	>	#define PERSIST_PARALL  2               /* user set -PP persist */
136	>	#define PERSIST_OURS    3               /* -PP persist belongs to us */
137	>	int     persist_state = PERSIST_NONE;   /* persist file state */
138	>	char    persistfn[] = "pfXXXXXX";       /* our persist file name, if set */
139
140		int             gargc;                  /* global argc */
141		char            **gargv;                /* global argv */
#	Line 90 | Line 147 | int            inpfmt = 'a';           /* input format */
147		int             outfmt = 'a';           /* output format */
148
149		int             header = 1;             /* output header? */
150	+	int             force_open = 0;         /* truncate existing output? */
151	+	int             recover = 0;            /* recover previous output? */
152	+	int             accumulate = 1;         /* input rays per output record */
153		int             xres = 0;               /* horiz. output resolution */
154		int             yres = 0;               /* vert. output resolution */
155
156	<	long            raysleft;               /* number of rays left to trace */
156	>	int             account;                /* current accumulation count */
157	>	unsigned long   raysleft;               /* number of rays left to trace */
158		long            waitflush;              /* how long until next flush */
159
160		unsigned long   lastray = 0;            /* last ray number sent */
#	Line 104 | Line 165 | int            using_stdout = 0;       /* are we using stdout? */
165		const char      *modname[MAXMODLIST];   /* ordered modifier name list */
166		int             nmods = 0;              /* number of modifiers */
167
168	<	MODCONT *addmodifier(char *modn, char *outf, char *binv);
168	>	#define queue_length()          (lastray - lastdone)
169
170	+	MODCONT *growmodifier(MODCONT *mp, int nb);
171	+	MODCONT *addmodifier(char *modn, char *outf, char *binv, int bincnt);
172	+	void addmodfile(char *fname, char *outf, char *binv, int bincnt);
173	+
174		void init(int np);
175		int done_rprocs(struct rtproc *rtp);
176	<	void trace_contribs(FILE *fp);
176	>	void reload_output(void);
177	>	void recover_output(FILE *fin);
178	>	void trace_contribs(FILE *fin);
179		struct rtproc *wait_rproc(void);
180		struct rtproc *get_rproc(void);
181		void queue_raytree(struct rtproc *rtp);
182		void process_queue(void);
183
184	<	void putcontrib(const DCOLOR cnt, FILE *fout);
184	>	void put_contrib(const DCOLOR cnt, FILE *fout);
185		void add_contrib(const char *modn);
186	<	void done_contrib(void);
186	>	void done_contrib(int navg);
187
188	+	#ifdef getc_unlocked                    /* avoid nasty overheads */
189	+	#undef getc
190	+	#define getc    getc_unlocked
191	+	#undef putc
192	+	#define putc    putc_unlocked
193	+	#undef ferror
194	+	#define ferror  ferror_unlocked
195	+	static int
196	+	fread_unl(void *ptr, int size, int nitems, FILE *fp)
197	+	{
198	+	char    *p = (char *)ptr;
199	+	int     len = size*nitems;
200	+	while (len-- > 0) {
201	+	int     c = getc_unlocked(fp);
202	+	if (c == EOF)
203	+	return((p - (char *)ptr)/size);
204	+	*p++ = c;
205	+	}
206	+	return(nitems);
207	+	}
208	+	#undef fread
209	+	#define fread   fread_unl
210	+	static int
211	+	fwrite_unl(const void *ptr, int size, int nitems, FILE *fp)
212	+	{
213	+	const char      *p = (const char *)ptr;
214	+	int             len = size*nitems;
215	+	while (len-- > 0)
216	+	putc_unlocked(*p++, fp);
217	+	if (ferror_unlocked(fp))
218	+	return(0);
219	+	return(nitems);
220	+	}
221	+	#undef fwrite
222	+	#define fwrite  fwrite_unl
223	+	#endif
224	+
225	+	/* return number of open rtrace processes */
226	+	static int
227	+	nrtprocs(void)
228	+	{
229	+	int     nrtp = 0;
230	+	struct rtproc   *rtp;
231	+
232	+	for (rtp = &rt0; rtp != NULL; rtp = rtp->next)
233	+	nrtp += rtp->pd.running;
234	+	return(nrtp);
235	+	}
236	+
237		/* set input/output format */
238		static void
239		setformat(const char *fmt)
#	Line 157 | Line 273 | fmterr:
273		int
274		main(int argc, char *argv[])
275		{
276	+	int     contrib = 0;
277		int     nprocs = 1;
278		char    *curout = NULL;
279		char    *binval = NULL;
280	+	int     bincnt = 0;
281		char    fmt[8];
282		int     i, j;
283	+	/* need at least one argument */
284	+	if (argc < 2) {
285	+	fprintf(stderr,
286	+	"Usage: %s [-n nprocs][-V][-r][-e expr][-f source][-o ospec][-b binv] {-m mod | -M file} [rtrace options] octree\n",
287	+	argv[0]);
288	+	exit(1);
289	+	}
290		/* global program name */
291		gargv = argv;
292		/* initialize calcomp routines */
#	Line 174 | Line 299 | main(int argc, char *argv[])
299		while ((j = expandarg(&argc, &argv, i)) > 0)
300		;
301		if (j < 0) {
302	<	fprintf(stderr, "%s: cannot expand '%s'",
302	>	fprintf(stderr, "%s: cannot expand '%s'\n",
303		argv[0], argv[i]);
304		exit(1);
305		}
306		if (argv[i][0] == '-')
307		switch (argv[i][1]) {
308		case 'n':               /* number of processes */
309	<	if (argv[i][2] || i >= argc-1) break;
309	>	if (argv[i][2] || i >= argc-2) break;
310		nprocs = atoi(argv[++i]);
311		if (nprocs <= 0)
312		error(USER, "illegal number of processes");
313		continue;
314	+	case 'V':               /* output contributions */
315	+	switch (argv[i][2]) {
316	+	case '\0':
317	+	contrib = !contrib;
318	+	continue;
319	+	case '+': case '1':
320	+	case 'T': case 't':
321	+	case 'Y': case 'y':
322	+	contrib = 1;
323	+	continue;
324	+	case '-': case '0':
325	+	case 'F': case 'f':
326	+	case 'N': case 'n':
327	+	contrib = 0;
328	+	continue;
329	+	}
330	+	break;
331	+	case 'c':               /* input rays per output */
332	+	if (argv[i][2] || i >= argc-2) break;
333	+	accumulate = atoi(argv[++i]);
334	+	continue;
335	+	case 'r':               /* recover output */
336	+	if (argv[i][2]) break;
337	+	recover = 1;
338	+	continue;
339		case 'h':               /* output header? */
340		switch (argv[i][2]) {
341		case '\0':
#	Line 203 | Line 353 | main(int argc, char *argv[])
353		continue;
354		}
355		break;
356	<	case 'f':               /* file or i/o format */
356	>	case 'f':               /* file or force or format */
357		if (!argv[i][2]) {
358		char    *fpath;
359	<	if (i >= argc-1) break;
359	>	if (i >= argc-2) break;
360		fpath = getpath(argv[++i],
361		getrlibpath(), R_OK);
362		if (fpath == NULL) {
#	Line 218 | Line 368 | main(int argc, char *argv[])
368		fcompile(fpath);
369		continue;
370		}
371	+	if (argv[i][2] == 'o') {
372	+	force_open = 1;
373	+	continue;
374	+	}
375		setformat(argv[i]+2);
376		continue;
377		case 'e':               /* expression */
378	<	if (argv[i][2] || i >= argc-1) break;
378	>	if (argv[i][2] || i >= argc-2) break;
379		scompile(argv[++i], NULL, 0);
380		continue;
381		case 'o':               /* output file spec. */
382	<	if (argv[i][2] || i >= argc-1) break;
382	>	if (argv[i][2] || i >= argc-2) break;
383		curout = argv[++i];
384		continue;
385		case 'x':               /* horiz. output resolution */
386	<	if (argv[i][2] || i >= argc-1) break;
386	>	if (argv[i][2] || i >= argc-2) break;
387		xres = atoi(argv[++i]);
388		continue;
389		case 'y':               /* vert. output resolution */
390	<	if (argv[i][2] || i >= argc-1) break;
390	>	if (argv[i][2] || i >= argc-2) break;
391		yres = atoi(argv[++i]);
392		continue;
393	<	case 'b':               /* bin expression */
394	<	if (argv[i][2] || i >= argc-1) break;
393	>	case 'b':               /* bin expression/count */
394	>	if (i >= argc-2) break;
395	>	if (argv[i][2] == 'n') {
396	>	bincnt = (int)(eval(argv[++i]) + .5);
397	>	continue;
398	>	}
399	>	if (argv[i][2]) break;
400		binval = argv[++i];
401		continue;
402		case 'm':               /* modifier name */
403	<	if (argv[i][2] || i >= argc-1) break;
403	>	if (argv[i][2] || i >= argc-2) break;
404		rtargv[rtargc++] = "-ti";
405		rtargv[rtargc++] = argv[++i];
406	<	addmodifier(argv[i], curout, binval);
406	>	addmodifier(argv[i], curout, binval, bincnt);
407		continue;
408	+	case 'M':               /* modifier file */
409	+	if (argv[i][2] || i >= argc-2) break;
410	+	rtargv[rtargc++] = "-tI";
411	+	rtargv[rtargc++] = argv[++i];
412	+	addmodfile(argv[i], curout, binval, bincnt);
413	+	continue;
414	+	case 'P':               /* persist file */
415	+	if (i >= argc-2) break;
416	+	persist_state = (argv[i][2] == 'P') ?
417	+	PERSIST_PARALL : PERSIST_SINGLE;
418	+	rtargv[rtargc++] = argv[i];
419	+	rtargv[rtargc++] = argv[++i];
420	+	continue;
421		}
422		rtargv[rtargc++] = argv[i];     /* assume rtrace option */
423		}
424	+	if (accumulate <= 0)    /* no output flushing for single record */
425	+	xres = yres = 0;
426		/* set global argument list */
427		gargc = argc; gargv = argv;
428		/* add "mandatory" rtrace settings */
429		for (j = 0; myrtopts[j] != NULL; j++)
430		rtargv[rtargc++] = myrtopts[j];
431	+	rtargv[rtargc++] = contrib ? RTCONTRIB : RTCOEFF;
432		/* just asking for defaults? */
433		if (!strcmp(argv[i], "-defaults")) {
434	<	char    sxres[16], syres[16];
434	>	char    nps[8], sxres[16], syres[16];
435		char    *rtpath;
436	<	printf("-n  %-2d\t\t\t\t# number of processes\n", nprocs);
436	>	printf("-c %-5d\t\t\t# accumulated rays per record\n",
437	>	accumulate);
438	>	printf("-V%c\t\t\t\t# output %s\n", contrib ? '+' : '-',
439	>	contrib ? "contributions" : "coefficients");
440		fflush(stdout);                 /* report OUR options */
441	+	rtargv[rtargc++] = "-n";
442	+	sprintf(nps, "%d", nprocs);
443	+	rtargv[rtargc++] = nps;
444		rtargv[rtargc++] = header ? "-h+" : "-h-";
445		sprintf(fmt, "-f%c%c", inpfmt, outfmt);
446		rtargv[rtargc++] = fmt;
#	Line 269 | Line 450 | main(int argc, char *argv[])
450		rtargv[rtargc++] = "-y";
451		sprintf(syres, "%d", yres);
452		rtargv[rtargc++] = syres;
272	–	rtargv[rtargc++] = "-oTW";
453		rtargv[rtargc++] = "-defaults";
454		rtargv[rtargc] = NULL;
455		rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
#	Line 283 | Line 463 | main(int argc, char *argv[])
463		exit(1);
464		}
465		if (nprocs > 1) {       /* add persist file if parallel */
466	<	rtargv[rtargc++] = "-PP";
467	<	rtargv[rtargc++] = mktemp(persistfn);
466	>	if (persist_state == PERSIST_SINGLE)
467	>	error(USER, "use -PP option for multiple processes");
468	>	if (persist_state == PERSIST_NONE) {
469	>	rtargv[rtargc++] = "-PP";
470	>	rtargv[rtargc++] = mktemp(persistfn);
471	>	persist_state = PERSIST_OURS;
472	>	}
473		}
474		/* add format string */
475		sprintf(fmt, "-f%cf", inpfmt);
#	Line 294 | Line 479 | main(int argc, char *argv[])
479		error(USER, "missing octree argument");
480		rtargv[rtargc++] = octree = argv[i];
481		rtargv[rtargc] = NULL;
482	<	/* start rtrace & compute contributions */
482	>	/* start rtrace & recover if requested */
483		init(nprocs);
484	+	/* compute contributions */
485		trace_contribs(stdin);
486	+	/* clean up */
487		quit(0);
488		}
489
490	+	#ifndef SIGALRM
491	+	#define SIGALRM SIGTERM
492	+	#endif
493		/* kill persistent rtrace process */
494		static void
495		killpersist(void)
496		{
497		FILE    *fp = fopen(persistfn, "r");
498	<	int     pid;
498	>	RT_PID  pid;
499
500		if (fp == NULL)
501		return;
#	Line 339 | Line 529 | quit(int status)
529		{
530		int     rtstat;
531
532	<	if (rt0.next != NULL)           /* terminate persistent rtrace */
532	>	if (persist_state == PERSIST_OURS)  /* terminate waiting rtrace */
533		killpersist();
534		/* clean up rtrace process(es) */
535		rtstat = done_rprocs(&rt0);
#	Line 401 | Line 591 | init(int np)
591		rtp->next = NULL;               /* terminate list */
592		if (yres > 0) {
593		if (xres > 0)
594	<	raysleft = xres*yres;
594	>	raysleft = (unsigned long)xres*yres;
595		else
596		raysleft = yres;
597		} else
598		raysleft = 0;
599	<	waitflush = xres;
599	>	if ((account = accumulate) > 0)
600	>	raysleft *= accumulate;
601	>	waitflush = (yres > 0) & (xres > 1) ? 0 : xres;
602	>	if (!recover)
603	>	return;
604	>	/* recover previous values */
605	>	if (accumulate <= 0)
606	>	reload_output();
607	>	else
608	>	recover_output(stdin);
609		}
610
611	+	/* grow modifier to accommodate more bins */
612	+	MODCONT *
613	+	growmodifier(MODCONT *mp, int nb)
614	+	{
615	+	if (nb <= mp->nbins)
616	+	return mp;
617	+	mp = (MODCONT *)realloc(mp, sizeof(MODCONT) + sizeof(DCOLOR)*(nb-1));
618	+	if (mp == NULL)
619	+	error(SYSTEM, "out of memory in growmodifier");
620	+	memset(mp->cbin+mp->nbins, 0, sizeof(DCOLOR)*(nb-mp->nbins));
621	+	mp->nbins = nb;
622	+	return mp;
623	+	}
624	+
625		/* add modifier to our list to track */
626		MODCONT *
627	<	addmodifier(char *modn, char *outf, char *binv)
627	>	addmodifier(char *modn, char *outf, char *binv, int bincnt)
628		{
629		LUENT   *lep = lu_find(&modconttab, modn);
630		MODCONT *mp;
631	+	int     i;
632
633		if (lep->data != NULL) {
634		sprintf(errmsg, "duplicate modifier '%s'", modn);
635		error(USER, errmsg);
636		}
637		if (nmods >= MAXMODLIST)
638	<	error(USER, "too many modifiers");
638	>	error(INTERNAL, "too many modifiers");
639		modname[nmods++] = modn;        /* XXX assumes static string */
640		lep->key = modn;                /* XXX assumes static string */
641		mp = (MODCONT *)malloc(sizeof(MODCONT));
642		if (mp == NULL)
643		error(SYSTEM, "out of memory in addmodifier");
430	–	lep->data = (char *)mp;
644		mp->outspec = outf;             /* XXX assumes static string */
645		mp->modname = modn;             /* XXX assumes static string */
646	<	if (binv != NULL)
647	<	mp->binv = eparse(binv);
648	<	else
649	<	mp->binv = eparse("0");
650	<	mp->nbins = 1;
646	>	if (binv == NULL)
647	>	binv = "0";             /* use single bin if unspecified */
648	>	mp->binv = eparse(binv);
649	>	if (mp->binv->type == NUM) {    /* check value if constant */
650	>	bincnt = (int)(evalue(mp->binv) + 1.5);
651	>	if (bincnt != 1) {
652	>	sprintf(errmsg, "illegal non-zero constant for bin (%s)",
653	>	binv);
654	>	error(USER, errmsg);
655	>	}
656	>	}
657	>	mp->nbins = 1;                  /* initialize results holder */
658		setcolor(mp->cbin[0], 0., 0., 0.);
659	+	if (bincnt > 1)
660	+	mp = growmodifier(mp, bincnt);
661	+	lep->data = (char *)mp;
662	+	/* allocate output streams */
663	+	for (i = bincnt; i-- > 0; )
664	+	getostream(mp->outspec, mp->modname, i, 1);
665		return mp;
666		}
667
668	+	/* add modifiers from a file list */
669	+	void
670	+	addmodfile(char *fname, char *outf, char *binv, int bincnt)
671	+	{
672	+	char    *mname[MAXMODLIST];
673	+	int     i;
674	+	/* find the file & store strings */
675	+	if (wordfile(mname, getpath(fname, getrlibpath(), R_OK)) < 0) {
676	+	sprintf(errmsg, "cannot find modifier file '%s'", fname);
677	+	error(SYSTEM, errmsg);
678	+	}
679	+	for (i = 0; mname[i]; i++)      /* add each one */
680	+	addmodifier(mname[i], outf, binv, bincnt);
681	+	}
682	+
683		/* put string to stderr */
684		void
685		eputs(char  *s)
#	Line 454 | Line 695 | eputs(char  *s)
695		midline = s[strlen(s)-1] != '\n';
696		}
697
698	+	/* construct output file name and return flags whether modifier/bin present */
699	+	int
700	+	ofname(char *oname, const char *ospec, const char *mname, int bn)
701	+	{
702	+	const char      *mnp = NULL;
703	+	const char      *bnp = NULL;
704	+	const char      *cp;
705	+
706	+	if (ospec == NULL)
707	+	return -1;
708	+	for (cp = ospec; *cp; cp++)             /* check format position(s) */
709	+	if (*cp == '%') {
710	+	do
711	+	++cp;
712	+	while (isdigit(*cp));
713	+	switch (*cp) {
714	+	case '%':
715	+	break;
716	+	case 's':
717	+	if (mnp != NULL)
718	+	return -1;
719	+	mnp = cp;
720	+	break;
721	+	case 'd':
722	+	case 'i':
723	+	case 'o':
724	+	case 'x':
725	+	case 'X':
726	+	if (bnp != NULL)
727	+	return -1;
728	+	bnp = cp;
729	+	break;
730	+	default:
731	+	return -1;
732	+	}
733	+	}
734	+	if (mnp != NULL) {                      /* create file name */
735	+	if (bnp != NULL) {
736	+	if (bnp > mnp)
737	+	sprintf(oname, ospec, mname, bn);
738	+	else
739	+	sprintf(oname, ospec, bn, mname);
740	+	return OF_MODIFIER|OF_BIN;
741	+	}
742	+	sprintf(oname, ospec, mname);
743	+	return OF_MODIFIER;
744	+	}
745	+	if (bnp != NULL) {
746	+	sprintf(oname, ospec, bn);
747	+	return OF_BIN;
748	+	}
749	+	strcpy(oname, ospec);
750	+	return 0;
751	+	}
752	+
753		/* write header to the given output stream */
754		void
755	<	printheader(FILE *fout)
755	>	printheader(FILE *fout, const char *info)
756		{
757		extern char     VersionID[];
758	<	FILE            *fin = fopen(octree, "r");
759	<
760	<	if (fin == NULL)
761	<	quit(1);
762	<	checkheader(fin, "ignore", fout);       /* copy octree header */
763	<	fclose(fin);
758	>	/* copy octree header */
759	>	if (octree[0] == '!') {
760	>	newheader("RADIANCE", fout);
761	>	fputs(octree+1, fout);
762	>	if (octree[strlen(octree)-1] != '\n')
763	>	fputc('\n', fout);
764	>	} else {
765	>	FILE    *fin = fopen(octree, "r");
766	>	if (fin == NULL)
767	>	quit(1);
768	>	checkheader(fin, "ignore", fout);
769	>	fclose(fin);
770	>	}
771		printargs(gargc-1, gargv, fout);        /* add our command */
772		fprintf(fout, "SOFTWARE= %s\n", VersionID);
773		fputnow(fout);
774	+	if (info != NULL)                       /* add extra info if given */
775	+	fputs(info, fout);
776		switch (outfmt) {                       /* add output format */
777		case 'a':
778		fputformat("ascii", fout);
#	Line 483 | Line 788 | printheader(FILE *fout)
788		break;
789		}
790		fputc('\n', fout);
486	–	if (xres > 0) {
487	–	if (yres > 0)                   /* resolution string */
488	–	fprtresolu(xres, yres, fout);
489	–	fflush(fout);
490	–	}
791		}
792
793	<	/* Get output file pointer (open and write header if new) */
794	<	FILE *
795	<	getofile(const char *ospec, const char *mname, int bn)
793	>	/* write resolution string to given output stream */
794	>	void
795	>	printresolu(FILE *fout, int xr, int yr)
796		{
797	<	const char      *mnp = NULL;
798	<	const char      *bnp = NULL;
799	<	const char      *cp;
800	<	char            ofname[1024];
801	<	LUENT           *lep;
797	>	if ((xr > 0) & (yr > 0))        /* resolution string */
798	>	fprtresolu(xr, yr, fout);
799	>	}
800	>
801	>	/* Get output stream pointer (open and write header if new and noopen==0) */
802	>	STREAMOUT *
803	>	getostream(const char *ospec, const char *mname, int bn, int noopen)
804	>	{
805	>	static const DCOLOR     nocontrib = BLKCOLOR;
806	>	static STREAMOUT        stdos;
807	>	int                     ofl;
808	>	char                    oname[1024];
809	>	LUENT                   *lep;
810	>	STREAMOUT               *sop;
811
812		if (ospec == NULL) {                    /* use stdout? */
813	<	if (!using_stdout) {
813	>	if (!noopen && !using_stdout) {
814		if (outfmt != 'a')
815		SET_FILE_BINARY(stdout);
816		if (header)
817	<	printheader(stdout);
817	>	printheader(stdout, NULL);
818	>	printresolu(stdout, xres, yres);
819	>	if (waitflush > 0)
820	>	fflush(stdout);
821	>	stdos.xr = xres; stdos.yr = yres;
822	>	using_stdout = 1;
823		}
824	<	using_stdout = 1;
825	<	return stdout;
824	>	stdos.ofp = stdout;
825	>	stdos.reclen += noopen;
826	>	return &stdos;
827		}
828	<	for (cp = ospec; *cp; cp++)             /* check format position(s) */
829	<	if (*cp == '%') {
830	<	do
831	<	++cp;
832	<	while (isdigit(*cp));
833	<	switch (*cp) {
519	<	case '%':
520	<	break;
521	<	case 's':
522	<	if (mnp != NULL)
523	<	goto badspec;
524	<	mnp = cp;
525	<	break;
526	<	case 'd':
527	<	if (bnp != NULL)
528	<	goto badspec;
529	<	bnp = cp;
530	<	break;
531	<	default:
532	<	goto badspec;
533	<	}
534	<	}
535	<	if (mnp != NULL) {                      /* create file name */
536	<	if (bnp != NULL) {
537	<	if (bnp > mnp)
538	<	sprintf(ofname, ospec, mname, bn);
539	<	else
540	<	sprintf(ofname, ospec, bn, mname);
541	<	} else
542	<	sprintf(ofname, ospec, mname);
543	<	} else if (bnp != NULL)
544	<	sprintf(ofname, ospec, bn);
545	<	else
546	<	strcpy(ofname, ospec);
547	<	lep = lu_find(&ofiletab, ofname);       /* look it up */
828	>	ofl = ofname(oname, ospec, mname, bn);  /* get output name */
829	>	if (ofl < 0) {
830	>	sprintf(errmsg, "bad output format '%s'", ospec);
831	>	error(USER, errmsg);
832	>	}
833	>	lep = lu_find(&ofiletab, oname);        /* look it up */
834		if (lep->key == NULL)                   /* new entry */
835	<	lep->key = strcpy((char *)malloc(strlen(ofname)+1), ofname);
836	<	if (lep->data == NULL) {                /* open output file */
837	<	FILE            *fp;
838	<	int             i;
839	<	if (ofname[0] == '!')           /* output to command */
840	<	fp = popen(ofname+1, "w");
841	<	else
842	<	fp = fopen(ofname, "w");
843	<	if (fp == NULL) {
844	<	sprintf(errmsg, "cannot open '%s' for writing", ofname);
845	<	error(SYSTEM, errmsg);
835	>	lep->key = strcpy((char *)malloc(strlen(oname)+1), oname);
836	>	sop = (STREAMOUT *)lep->data;
837	>	if (sop == NULL) {                      /* allocate stream */
838	>	sop = (STREAMOUT *)malloc(sizeof(STREAMOUT));
839	>	if (sop == NULL)
840	>	error(SYSTEM, "out of memory in getostream");
841	>	sop->outpipe = oname[0] == '!';
842	>	sop->reclen = 0;
843	>	sop->ofp = NULL;                /* open iff noopen==0 */
844	>	sop->xr = xres; sop->yr = yres;
845	>	lep->data = (char *)sop;
846	>	if (!sop->outpipe & !force_open & !recover &&
847	>	access(oname, F_OK) == 0) {
848	>	errno = EEXIST;         /* file exists */
849	>	goto openerr;
850		}
851	+	}
852	+	if (!noopen && sop->ofp == NULL) {      /* open output stream */
853	+	long            i;
854	+	if (oname[0] == '!')            /* output to command */
855	+	sop->ofp = popen(oname+1, "w");
856	+	else                            /* else open file */
857	+	sop->ofp = fopen(oname, "w");
858	+	if (sop->ofp == NULL)
859	+	goto openerr;
860		if (outfmt != 'a')
861	<	SET_FILE_BINARY(fp);
862	<	if (header)
863	<	printheader(fp);
861	>	SET_FILE_BINARY(sop->ofp);
862	>	#ifdef getc_unlocked                            /* avoid lock/unlock overhead */
863	>	flockfile(sop->ofp);
864	>	#endif
865	>	if (header) {
866	>	char    info[512];
867	>	char    *cp = info;
868	>	if (ofl & OF_MODIFIER || sop->reclen == 1) {
869	>	sprintf(cp, "MODIFIER=%s\n", mname);
870	>	while (*cp) ++cp;
871	>	}
872	>	if (ofl & OF_BIN) {
873	>	sprintf(cp, "BIN=%d\n", bn);
874	>	while (*cp) ++cp;
875	>	}
876	>	*cp = '\0';
877	>	printheader(sop->ofp, info);
878	>	}
879	>	if (accumulate > 0) {           /* global resolution */
880	>	sop->xr = xres; sop->yr = yres;
881	>	}
882	>	printresolu(sop->ofp, sop->xr, sop->yr);
883		/* play catch-up */
884	<	for (i = 0; i < lastdone; i++) {
885	<	static const DCOLOR     nocontrib = BLKCOLOR;
886	<	putcontrib(nocontrib, fp);
884	>	for (i = accumulate > 0 ? lastdone/accumulate : 0; i--; ) {
885	>	int     j = sop->reclen;
886	>	if (j <= 0) j = 1;
887	>	while (j--)
888	>	put_contrib(nocontrib, sop->ofp);
889		if (outfmt == 'a')
890	<	putc('\n', fp);
890	>	putc('\n', sop->ofp);
891		}
892	<	if (xres > 0)
893	<	fflush(fp);
574	<	lep->data = (char *)fp;
892	>	if (waitflush > 0)
893	>	fflush(sop->ofp);
894		}
895	<	return (FILE *)lep->data;               /* return open file pointer */
896	<	badspec:
897	<	sprintf(errmsg, "bad output format '%s'", ospec);
898	<	error(USER, errmsg);
899	<	return NULL;            /* pro forma return */
895	>	sop->reclen += noopen;                  /* add to length if noopen */
896	>	return sop;                             /* return output stream */
897	>	openerr:
898	>	sprintf(errmsg, "cannot open '%s' for writing", oname);
899	>	error(SYSTEM, errmsg);
900	>	return NULL;    /* pro forma return */
901		}
902
903		/* read input ray into buffer */
904		int
905		getinp(char *buf, FILE *fp)
906		{
907	+	double  dv[3], *dvp;
908	+	float   *fvp;
909		char    *cp;
910		int     i;
911
#	Line 592 | Line 914 | getinp(char *buf, FILE *fp)
914		cp = buf;               /* make sure we get 6 floats */
915		for (i = 0; i < 6; i++) {
916		if (fgetword(cp, buf+127-cp, fp) == NULL)
917	<	return 0;
917	>	return -1;
918	>	if (i >= 3)
919	>	dv[i-3] = atof(cp);
920		if ((cp = fskip(cp)) == NULL || *cp)
921	<	return 0;
921	>	return -1;
922		*cp++ = ' ';
923		}
924		getc(fp);               /* get/put eol */
925		*cp-- = '\0'; *cp = '\n';
926	+	if (DOT(dv,dv) <= FTINY*FTINY)
927	+	return 0;       /* dummy ray */
928		return strlen(buf);
929		case 'f':
930	<	if (fread(buf, sizeof(float), 6, fp) < 6)
931	<	return 0;
930	>	if (fread(buf, sizeof(float), 6, fp) != 6)
931	>	return -1;
932	>	fvp = (float *)buf + 3;
933	>	if (DOT(fvp,fvp) <= FTINY*FTINY)
934	>	return 0;       /* dummy ray */
935		return sizeof(float)*6;
936		case 'd':
937	<	if (fread(buf, sizeof(double), 6, fp) < 6)
938	<	return 0;
937	>	if (fread(buf, sizeof(double), 6, fp) != 6)
938	>	return -1;
939	>	dvp = (double *)buf + 3;
940	>	if (DOT(dvp,dvp) <= FTINY*FTINY)
941	>	return 0;       /* dummy ray */
942		return sizeof(double)*6;
943		}
944		error(INTERNAL, "botched input format");
945	<	return 0;       /* pro forma return */
945	>	return -1;      /* pro forma return */
946		}
947
948		static float    rparams[9];             /* traced ray parameters */
#	Line 640 | Line 972 | add_contrib(const char *modn)
972		bn = (int)(evalue(mp->binv) + .5);
973		if (bn <= 0)
974		bn = 0;
975	<	else if (bn > mp->nbins) {      /* new bin */
976	<	mp = (MODCONT *)realloc(mp, sizeof(MODCONT) +
645	<	bn*sizeof(DCOLOR));
646	<	if (mp == NULL)
647	<	error(SYSTEM, "out of memory in add_contrib");
648	<	memset(mp->cbin+mp->nbins, 0, sizeof(DCOLOR)*(bn+1-mp->nbins));
649	<	mp->nbins = bn+1;
650	<	le->data = (char *)mp;
651	<	}
975	>	else if (bn >= mp->nbins)       /* new bin */
976	>	le->data = (char *)(mp = growmodifier(mp, bn+1));
977		addcolor(mp->cbin[bn], rparams);
978		}
979
#	Line 656 | Line 981 | add_contrib(const char *modn)
981		static int
982		puteol(const LUENT *e, void *p)
983		{
984	<	FILE    *fp = (FILE *)e->data;
984	>	STREAMOUT       *sop = (STREAMOUT *)e->data;
985
986		if (outfmt == 'a')
987	<	putc('\n', fp);
987	>	putc('\n', sop->ofp);
988		if (!waitflush)
989	<	fflush(fp);
990	<	if (ferror(fp)) {
989	>	fflush(sop->ofp);
990	>	if (ferror(sop->ofp)) {
991		sprintf(errmsg, "write error on file '%s'", e->key);
992		error(SYSTEM, errmsg);
993		}
#	Line 671 | Line 996 | puteol(const LUENT *e, void *p)
996
997		/* put out ray contribution to file */
998		void
999	<	putcontrib(const DCOLOR cnt, FILE *fout)
999	>	put_contrib(const DCOLOR cnt, FILE *fout)
1000		{
1001		float   fv[3];
1002		COLR    cv;
#	Line 681 | Line 1006 | putcontrib(const DCOLOR cnt, FILE *fout)
1006		fprintf(fout, "%.6e\t%.6e\t%.6e\t", cnt[0], cnt[1], cnt[2]);
1007		break;
1008		case 'f':
1009	<	fv[0] = cnt[0];
685	<	fv[1] = cnt[1];
686	<	fv[2] = cnt[2];
1009	>	copycolor(fv, cnt);
1010		fwrite(fv, sizeof(float), 3, fout);
1011		break;
1012		case 'd':
#	Line 698 | Line 1021 | putcontrib(const DCOLOR cnt, FILE *fout)
1021		}
1022		}
1023
1024	<	/* output ray tallies and clear for next primary */
1024	>	/* output ray tallies and clear for next accumulation */
1025		void
1026	<	done_contrib(void)
1026	>	done_contrib(int navg)
1027		{
1028	<	int     i, j;
1029	<	MODCONT *mp;
1028	>	double          sf = 1.;
1029	>	int             i, j;
1030	>	MODCONT         *mp;
1031	>	STREAMOUT       *sop;
1032	>	/* set average scaling */
1033	>	if (navg > 1)
1034	>	sf = 1. / (double)navg;
1035		/* output modifiers in order */
1036		for (i = 0; i < nmods; i++) {
709	–	FILE    *fp;
1037		mp = (MODCONT *)lu_find(&modconttab,modname[i])->data;
1038	<	fp = getofile(mp->outspec, mp->modname, 0);
1039	<	putcontrib(mp->cbin[0], fp);
1038	>	if (navg > 1)                   /* average scaling */
1039	>	for (j = mp->nbins; j--; )
1040	>	scalecolor(mp->cbin[j], sf);
1041	>	sop = getostream(mp->outspec, mp->modname, 0,0);
1042	>	put_contrib(mp->cbin[0], sop->ofp);
1043		if (mp->nbins > 3 &&            /* minor optimization */
1044	<	fp == getofile(mp->outspec, mp->modname, 1))
1044	>	sop == getostream(mp->outspec, mp->modname, 1,0))
1045		for (j = 1; j < mp->nbins; j++)
1046	<	putcontrib(mp->cbin[j], fp);
1046	>	put_contrib(mp->cbin[j], sop->ofp);
1047		else
1048		for (j = 1; j < mp->nbins; j++)
1049	<	putcontrib(mp->cbin[j],
1050	<	getofile(mp->outspec, mp->modname, j));
1051	<	/* clear for next ray tree */
1049	>	put_contrib(mp->cbin[j],
1050	>	getostream(mp->outspec,mp->modname,j,0)->ofp);
1051	>	/* clear for next time */
1052		memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
1053		}
1054		--waitflush;                            /* terminate records */
#	Line 726 | Line 1056 | done_contrib(void)
1056		if (using_stdout & (outfmt == 'a'))
1057		putc('\n', stdout);
1058		if (!waitflush) {
1059	<	waitflush = xres;
1059	>	waitflush = (yres > 0) & (xres > 1) ? 0 : xres;
1060		if (using_stdout)
1061		fflush(stdout);
1062		}
#	Line 777 | Line 1107 | process_queue(void)
1107		if (!n || !(isalpha(*cp) | (*cp == '_')))
1108		error(USER, "bad modifier name from rtrace");
1109		/* get modifier name */
1110	<	while (n > 0 && *cp != '\t') {
1110	>	while (n > 1 && *cp != '\t') {
1111	>	if (mnp - modname >= sizeof(modname)-2)
1112	>	error(INTERNAL, "modifier name too long");
1113		*mnp++ = *cp++; n--;
1114		}
1115		*mnp = '\0';
#	Line 789 | Line 1121 | process_queue(void)
1121		cp += sizeof(float)*9; n -= sizeof(float)*9;
1122		add_contrib(modname);
1123		}
1124	<	done_contrib();         /* sum up contributions & output */
1124	>	/* time to produce record? */
1125	>	if (account > 0 && !--account)
1126	>	done_contrib(account = accumulate);
1127		lastdone = rtp->raynum;
1128	<	free(rtp->buf);         /* free up buffer space */
1128	>	if (rtp->buf != NULL)   /* free up buffer space */
1129	>	free(rtp->buf);
1130		rt_unproc = rtp->next;
1131		free(rtp);              /* done with this ray tree */
1132		}
#	Line 803 | Line 1138 | wait_rproc(void)
1138		{
1139		struct rtproc   *rtfree = NULL;
1140		fd_set          readset, errset;
1141	<	int             nr;
1141	>	ssize_t         nr;
1142		struct rtproc   *rt;
1143		int             n;
1144
#	Line 834 | Line 1169 | wait_rproc(void)
1169		continue;
1170		if (rt->buf == NULL) {
1171		rt->bsiz = treebufsiz;
1172	<	rt->buf = (char *)malloc(treebufsiz);
1172	>	rt->buf = (char *)malloc(rt->bsiz);
1173		} else if (rt->nbr + BUFSIZ > rt->bsiz) {
1174		if (rt->bsiz + BUFSIZ <= treebufsiz)
1175		rt->bsiz = treebufsiz;
1176	<	else
1177	<	rt->bsiz = treebufsiz += BUFSIZ;
1176	>	else if ((treebufsiz = rt->bsiz += BUFSIZ) < 0)
1177	>	error(INTERNAL,
1178	>	"ray buffer does not fit memory");
1179		rt->buf = (char *)realloc(rt->buf, rt->bsiz);
1180		}
1181		if (rt->buf == NULL)
1182		error(SYSTEM, "out of memory in wait_rproc");
1183	<	nr = read(rt->pd.r, rt->buf+rt->nbr, rt->bsiz-rt->nbr);
1184	<	if (nr <= 0)
1183	>	nr = rt->bsiz - rt->nbr;
1184	>	if (nr & ~0x7fffffff)   /* avoid 32-bit OS issues */
1185	>	nr = 0x7fffffff;
1186	>	nr = read(rt->pd.r, rt->buf+rt->nbr, nr);
1187	>	if (nr < 0)
1188	>	error(SYSTEM, "read error from rtrace");
1189	>	if (!nr)
1190		error(USER, "rtrace process died");
1191		rt->nbr += nr;          /* advance & check */
1192	<	if (rt->nbr >= 4 && !memcmp(rt->buf+rt->nbr-4,
1193	<	"~\t~\t", 4)) {
1194	<	rt->nbr -= 4;   /* elide terminator */
1192	>	if (rt->nbr >= 6 && !memcmp(rt->buf+rt->nbr-6,
1193	>	"~\t~\t~\t", 6)) {
1194	>	rt->nbr -= 6;   /* elide terminator */
1195		queue_raytree(rt);
1196		rtfree = rt;    /* ready for next ray */
1197		}
#	Line 875 | Line 1216 | get_rproc(void)
1216		void
1217		trace_contribs(FILE *fin)
1218		{
1219	+	static int      ignore_warning_given = 0;
1220		char            inpbuf[128];
1221		int             iblen;
1222		struct rtproc   *rtp;
1223		/* loop over input */
1224	<	while ((iblen = getinp(inpbuf, fin)) > 0) {
1225	<	if (lastray+1 < lastray) {      /* counter rollover? */
1224	>	while ((iblen = getinp(inpbuf, fin)) >= 0) {
1225	>	if (!iblen && accumulate != 1) {
1226	>	if (!ignore_warning_given++)
1227	>	error(WARNING,
1228	>	"dummy ray(s) ignored during accumulation\n");
1229	>	continue;
1230	>	}
1231	>	if (!iblen ||                   /* need flush/reset? */
1232	>	queue_length() > 10*nrtprocs() ||
1233	>	lastray+1 < lastray) {
1234		while (wait_rproc() != NULL)
1235		process_queue();
1236		lastdone = lastray = 0;
1237		}
1238		rtp = get_rproc();              /* get avail. rtrace process */
1239	<	rtp->raynum = ++lastray;        /* assign ray to it */
1240	<	writebuf(rtp->pd.w, inpbuf, iblen);
1241	<	if (!--raysleft)
1242	<	break;
1239	>	rtp->raynum = ++lastray;        /* assign ray */
1240	>	if (iblen) {                    /* trace ray if valid */
1241	>	writebuf(rtp->pd.w, inpbuf, iblen);
1242	>	} else {                        /* else bypass dummy ray */
1243	>	queue_raytree(rtp);     /* queue empty ray/record */
1244	>	if ((yres <= 0) | (xres <= 0))
1245	>	waitflush = 1;  /* flush right after */
1246	>	}
1247		process_queue();                /* catch up with results */
1248	+	if (raysleft && !--raysleft)
1249	+	break;                  /* preemptive EOI */
1250		}
1251		while (wait_rproc() != NULL)            /* process outstanding rays */
1252		process_queue();
1253	<	if (raysleft > 0)
1253	>	if (accumulate <= 0)
1254	>	done_contrib(0);                /* output tallies */
1255	>	else if (account < accumulate) {
1256	>	error(WARNING, "partial accumulation in final record");
1257	>	done_contrib(accumulate - account);
1258	>	}
1259	>	if (raysleft)
1260		error(USER, "unexpected EOF on input");
1261	+	lu_done(&ofiletab);                     /* close output files */
1262	+	}
1263	+
1264	+	/* get ray contribution from previous file */
1265	+	static int
1266	+	get_contrib(DCOLOR cnt, FILE *finp)
1267	+	{
1268	+	COLOR   fv;
1269	+	COLR    cv;
1270	+
1271	+	switch (outfmt) {
1272	+	case 'a':
1273	+	return(fscanf(finp,"%lf %lf %lf",&cnt[0],&cnt[1],&cnt[2]) == 3);
1274	+	case 'f':
1275	+	if (fread(fv, sizeof(fv[0]), 3, finp) != 3)
1276	+	return(0);
1277	+	copycolor(cnt, fv);
1278	+	return(1);
1279	+	case 'd':
1280	+	return(fread(cnt, sizeof(cnt[0]), 3, finp) == 3);
1281	+	case 'c':
1282	+	if (fread(cv, sizeof(cv), 1, finp) != 1)
1283	+	return(0);
1284	+	colr_color(fv, cv);
1285	+	copycolor(cnt, fv);
1286	+	return(1);
1287	+	default:
1288	+	error(INTERNAL, "botched output format");
1289	+	}
1290	+	return(0);      /* pro forma return */
1291	+	}
1292	+
1293	+	/* close output file opened for input */
1294	+	static int
1295	+	myclose(const LUENT *e, void *p)
1296	+	{
1297	+	STREAMOUT       *sop = (STREAMOUT *)e->data;
1298	+
1299	+	if (sop->ofp == NULL)
1300	+	return(0);
1301	+	fclose(sop->ofp);
1302	+	sop->ofp = NULL;
1303	+	return(0);
1304	+	}
1305	+
1306	+	/* load previously accumulated values */
1307	+	void
1308	+	reload_output(void)
1309	+	{
1310	+	int             i, j;
1311	+	MODCONT         *mp;
1312	+	int             ofl;
1313	+	char            oname[1024];
1314	+	char            *fmode = "rb";
1315	+	char            *outvfmt;
1316	+	LUENT           *ment, *oent;
1317	+	int             xr, yr;
1318	+	STREAMOUT       sout;
1319	+	DCOLOR          rgbv;
1320	+
1321	+	switch (outfmt) {
1322	+	case 'a':
1323	+	outvfmt = "ascii";
1324	+	fmode = "r";
1325	+	break;
1326	+	case 'f':
1327	+	outvfmt = "float";
1328	+	break;
1329	+	case 'd':
1330	+	outvfmt = "double";
1331	+	break;
1332	+	case 'c':
1333	+	outvfmt = COLRFMT;
1334	+	break;
1335	+	default:
1336	+	error(INTERNAL, "botched output format");
1337	+	return;
1338	+	}
1339	+	/* reload modifier values */
1340	+	for (i = 0; i < nmods; i++) {
1341	+	ment = lu_find(&modconttab,modname[i]);
1342	+	mp = (MODCONT *)ment->data;
1343	+	if (mp->outspec == NULL)
1344	+	error(USER, "cannot reload from stdout");
1345	+	if (mp->outspec[0] == '!')
1346	+	error(USER, "cannot reload from command");
1347	+	for (j = 0; ; j++) {            /* load each modifier bin */
1348	+	ofl = ofname(oname, mp->outspec, mp->modname, j);
1349	+	if (ofl < 0)
1350	+	error(USER, "bad output file specification");
1351	+	oent = lu_find(&ofiletab, oname);
1352	+	if (oent->data != NULL) {
1353	+	sout = *(STREAMOUT *)oent->data;
1354	+	} else {
1355	+	sout.reclen = 0;
1356	+	sout.outpipe = 0;
1357	+	sout.xr = xres; sout.yr = yres;
1358	+	sout.ofp = NULL;
1359	+	}
1360	+	if (sout.ofp == NULL) { /* open output as input */
1361	+	sout.ofp = fopen(oname, fmode);
1362	+	if (sout.ofp == NULL) {
1363	+	if (j)
1364	+	break;  /* assume end of modifier */
1365	+	sprintf(errmsg, "missing reload file '%s'",
1366	+	oname);
1367	+	error(WARNING, errmsg);
1368	+	break;
1369	+	}
1370	+	#ifdef getc_unlocked                                    /* avoid lock/unlock overhead */
1371	+	flockfile(sout.ofp);
1372	+	#endif
1373	+	if (header && checkheader(sout.ofp, outvfmt, NULL) != 1) {
1374	+	sprintf(errmsg, "format mismatch for '%s'",
1375	+	oname);
1376	+	error(USER, errmsg);
1377	+	}
1378	+	if ((sout.xr > 0) & (sout.yr > 0) &&
1379	+	(!fscnresolu(&xr, &yr, sout.ofp) ||
1380	+	(xr != sout.xr) |
1381	+	(yr != sout.yr))) {
1382	+	sprintf(errmsg, "resolution mismatch for '%s'",
1383	+	oname);
1384	+	error(USER, errmsg);
1385	+	}
1386	+	}
1387	+	/* read in RGB value */
1388	+	if (!get_contrib(rgbv, sout.ofp)) {
1389	+	if (!j) {
1390	+	fclose(sout.ofp);
1391	+	break;          /* ignore empty file */
1392	+	}
1393	+	if (j < mp->nbins) {
1394	+	sprintf(errmsg, "missing data in '%s'",
1395	+	oname);
1396	+	error(USER, errmsg);
1397	+	}
1398	+	break;
1399	+	}
1400	+	if (j >= mp->nbins)             /* grow modifier size */
1401	+	ment->data = (char *)(mp = growmodifier(mp, j+1));
1402	+	copycolor(mp->cbin[j], rgbv);
1403	+	if (oent->key == NULL)          /* new file entry */
1404	+	oent->key = strcpy((char *)
1405	+	malloc(strlen(oname)+1), oname);
1406	+	if (oent->data == NULL)
1407	+	oent->data = (char *)malloc(sizeof(STREAMOUT));
1408	+	*(STREAMOUT *)oent->data = sout;
1409	+	}
1410	+	}
1411	+	lu_doall(&ofiletab, myclose, NULL);     /* close all files */
1412	+	}
1413	+
1414	+	/* seek on the given output file */
1415	+	static int
1416	+	myseeko(const LUENT *e, void *p)
1417	+	{
1418	+	STREAMOUT       *sop = (STREAMOUT *)e->data;
1419	+	off_t           nbytes = *(off_t *)p;
1420	+
1421	+	if (sop->reclen > 1)
1422	+	nbytes = nbytes * sop->reclen;
1423	+	if (fseeko(sop->ofp, nbytes, SEEK_CUR) < 0) {
1424	+	sprintf(errmsg, "seek error on file '%s'", e->key);
1425	+	error(SYSTEM, errmsg);
1426	+	}
1427	+	return 0;
1428	+	}
1429	+
1430	+	/* recover output if possible */
1431	+	void
1432	+	recover_output(FILE *fin)
1433	+	{
1434	+	off_t           lastout = -1;
1435	+	int             outvsiz, recsiz;
1436	+	char            *outvfmt;
1437	+	int             i, j;
1438	+	MODCONT         *mp;
1439	+	int             ofl;
1440	+	char            oname[1024];
1441	+	LUENT           *ment, *oent;
1442	+	STREAMOUT       sout;
1443	+	off_t           nvals;
1444	+	int             xr, yr;
1445	+
1446	+	switch (outfmt) {
1447	+	case 'a':
1448	+	error(USER, "cannot recover ASCII output");
1449	+	return;
1450	+	case 'f':
1451	+	outvsiz = sizeof(float)*3;
1452	+	outvfmt = "float";
1453	+	break;
1454	+	case 'd':
1455	+	outvsiz = sizeof(double)*3;
1456	+	outvfmt = "double";
1457	+	break;
1458	+	case 'c':
1459	+	outvsiz = sizeof(COLR);
1460	+	outvfmt = COLRFMT;
1461	+	break;
1462	+	default:
1463	+	error(INTERNAL, "botched output format");
1464	+	return;
1465	+	}
1466	+	/* check modifier outputs */
1467	+	for (i = 0; i < nmods; i++) {
1468	+	ment = lu_find(&modconttab,modname[i]);
1469	+	mp = (MODCONT *)ment->data;
1470	+	if (mp->outspec == NULL)
1471	+	error(USER, "cannot recover from stdout");
1472	+	if (mp->outspec[0] == '!')
1473	+	error(USER, "cannot recover from command");
1474	+	for (j = 0; ; j++) {            /* check each bin's file */
1475	+	ofl = ofname(oname, mp->outspec, mp->modname, j);
1476	+	if (ofl < 0)
1477	+	error(USER, "bad output file specification");
1478	+	oent = lu_find(&ofiletab, oname);
1479	+	if (oent->data != NULL) {
1480	+	sout = *(STREAMOUT *)oent->data;
1481	+	} else {
1482	+	sout.reclen = 0;
1483	+	sout.outpipe = 0;
1484	+	sout.ofp = NULL;
1485	+	}
1486	+	if (sout.ofp != NULL) { /* already open? */
1487	+	if (ofl & OF_BIN)
1488	+	continue;
1489	+	break;
1490	+	}
1491	+	/* open output */
1492	+	sout.ofp = fopen(oname, "rb+");
1493	+	if (sout.ofp == NULL) {
1494	+	if (j)
1495	+	break;  /* assume end of modifier */
1496	+	sprintf(errmsg, "missing recover file '%s'",
1497	+	oname);
1498	+	error(WARNING, errmsg);
1499	+	break;
1500	+	}
1501	+	nvals = lseek(fileno(sout.ofp), 0, SEEK_END);
1502	+	if (nvals <= 0) {
1503	+	lastout = 0;    /* empty output, quit here */
1504	+	fclose(sout.ofp);
1505	+	break;
1506	+	}
1507	+	if (!sout.reclen) {
1508	+	if (!(ofl & OF_BIN)) {
1509	+	sprintf(errmsg,
1510	+	"need -bn to recover file '%s'",
1511	+	oname);
1512	+	error(USER, errmsg);
1513	+	}
1514	+	recsiz = outvsiz;
1515	+	} else
1516	+	recsiz = outvsiz * sout.reclen;
1517	+
1518	+	lseek(fileno(sout.ofp), 0, SEEK_SET);
1519	+	if (header && checkheader(sout.ofp, outvfmt, NULL) != 1) {
1520	+	sprintf(errmsg, "format mismatch for '%s'",
1521	+	oname);
1522	+	error(USER, errmsg);
1523	+	}
1524	+	sout.xr = xres; sout.yr = yres;
1525	+	if ((sout.xr > 0) & (sout.yr > 0) &&
1526	+	(!fscnresolu(&xr, &yr, sout.ofp) ||
1527	+	(xr != sout.xr) |
1528	+	(yr != sout.yr))) {
1529	+	sprintf(errmsg, "resolution mismatch for '%s'",
1530	+	oname);
1531	+	error(USER, errmsg);
1532	+	}
1533	+	nvals = (nvals - (off_t)ftell(sout.ofp)) / recsiz;
1534	+	if ((lastout < 0) | (nvals < lastout))
1535	+	lastout = nvals;
1536	+	if (oent->key == NULL)  /* new entry */
1537	+	oent->key = strcpy((char *)
1538	+	malloc(strlen(oname)+1), oname);
1539	+	if (oent->data == NULL)
1540	+	oent->data = (char *)malloc(sizeof(STREAMOUT));
1541	+	*(STREAMOUT *)oent->data = sout;
1542	+	if (!(ofl & OF_BIN))
1543	+	break;          /* no bin separation */
1544	+	}
1545	+	if (!lastout) {                 /* empty output */
1546	+	error(WARNING, "no previous data to recover");
1547	+	lu_done(&ofiletab);     /* reclose all outputs */
1548	+	return;
1549	+	}
1550	+	if (j > mp->nbins)              /* reallocate modifier bins */
1551	+	ment->data = (char *)(mp = growmodifier(mp, j));
1552	+	}
1553	+	if (lastout < 0) {
1554	+	error(WARNING, "no output files to recover");
1555	+	return;
1556	+	}
1557	+	if (raysleft && lastout >= raysleft/accumulate) {
1558	+	error(WARNING, "output appears to be complete");
1559	+	/* XXX should read & discard input? */
1560	+	quit(0);
1561	+	}
1562	+	/* seek on all files */
1563	+	nvals = lastout * outvsiz;
1564	+	lu_doall(&ofiletab, myseeko, &nvals);
1565	+	/* skip repeated input */
1566	+	for (nvals = 0; nvals < lastout; nvals++)
1567	+	if (getinp(oname, fin) < 0)
1568	+	error(USER, "unexpected EOF on input");
1569	+	lastray = lastdone = (unsigned long)lastout * accumulate;
1570	+	if (raysleft)
1571	+	raysleft -= lastray;
1572		}

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