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

Comparing ray/src/util/rtcontrib.c (file contents):
Revision 1.2 by greg, Thu May 26 06:55:22 2005 UTC vs.
Revision 1.50 by greg, Thu May 1 16:42:06 2008 UTC

#	Line 5 | Line 5 | static const char RCSid[] = "$Id$";
5		* Gather rtrace output to compute contributions from particular sources
6		*/
7
8	+	#include  "standard.h"
9		#include  <ctype.h>
10	<	#include  "rtio.h"
10	<	#include  "rterror.h"
10	>	#include  <signal.h>
11		#include  "platform.h"
12		#include  "rtprocess.h"
13		#include  "selcall.h"
#	Line 16 | Line 16 | static const char RCSid[] = "$Id$";
16		#include  "lookup.h"
17		#include  "calcomp.h"
18
19	+	#ifndef MAXMODLIST
20		#define MAXMODLIST      1024            /* maximum modifiers we'll track */
21	+	#endif
22
23		int     treebufsiz = BUFSIZ;            /* current tree buffer size */
24
25		typedef double  DCOLOR[3];              /* double-precision color */
26
27		/*
28	<	* The modcont structure is used to accumulate ray contributions
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
30	>	* if binv evaluates > 0.  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
#	Line 44 | Line 46 | static void mcfree(void *p) { epfree((*(MODCONT *)p).b
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); }
49	>	/*
50	>	* The STREAMOUT structure holds an open FILE pointer and a count of
51	>	* the number of RGB triplets per record, or 0 if unknown.
52	>	*/
53	>	typedef struct {
54	>	FILE            *ofp;           /* output file pointer */
55	>	int             outpipe;        /* output is to a pipe */
56	>	int             reclen;         /* triplets/record */
57	>	int             xr, yr;         /* output resolution for picture */
58	>	} STREAMOUT;
59
60	<	LUTAB   ofiletab = LU_SINIT(free,closefile);    /* output file table */
60	>	/* close output stream and free record */
61	>	static void
62	>	closestream(void *p)
63	>	{
64	>	STREAMOUT       *sop = (STREAMOUT *)p;
65	>	int             status;
66	>	if (sop->outpipe)
67	>	status = pclose(sop->ofp);
68	>	else
69	>	status = fclose(sop->ofp);
70	>	if (status)
71	>	error(SYSTEM, "error closing output stream");
72	>	free(p);
73	>	}
74
75	<	FILE *getofile(const char *ospec, const char *mname, int bn);
75	>	LUTAB   ofiletab = LU_SINIT(free,closestream);  /* output file table */
76
77	+	#define OF_MODIFIER     01
78	+	#define OF_BIN          02
79	+
80	+	STREAMOUT *getostream(const char *ospec, const char *mname, int bn, int noopen);
81	+	int ofname(char *oname, const char *ospec, const char *mname, int bn);
82	+	void printheader(FILE *fout, const char *info);
83	+	void printresolu(FILE *fout, int xr, int yr);
84	+
85		/*
86		* The rcont structure is used to manage i/o with a particular
87		* rtrace child process.  Input is passed unchanged from stdin,
#	Line 64 | Line 95 | struct rtproc {
95		int             bsiz;           /* ray tree buffer length */
96		char            *buf;           /* ray tree buffer */
97		int             nbr;            /* number of bytes from rtrace */
98	<	};                              /* rtrace process */
98	>	};                              /* rtrace process buffer */
99
100		/* rtrace command and defaults */
101	<	char            *rtargv[256] = { "rtrace", "-dt", "0", "-dj", ".5", "-dr", "3",
102	<	"-ab", "1", "-ad", "512", };
103	<	int  rtargc = 11;
101	>	char            *rtargv[256+2*MAXMODLIST] = { "rtrace",
102	>	"-dj", ".5", "-dr", "3",
103	>	"-ab", "1", "-ad", "350", };
104	>
105	>	int  rtargc = 9;
106		/* overriding rtrace options */
107	<	char            *myrtopts[] = { "-o~~TmWdp", "-h-",
108	<	"-x", "1", "-y", "0",
76	<	"-as", "0", "-aa", "0", NULL };
107	>	char            *myrtopts[] = { "-h-", "-x", "1", "-y", "0",
108	>	"-dt", "0", "-as", "0", "-aa", "0", NULL };
109
110	+	#define RTCOEFF         "-o~~TmWdp"     /* compute coefficients only */
111	+	#define RTCONTRIB       "-o~~TmVdp"     /* compute ray contributions */
112	+
113		struct rtproc   rt0;                    /* head of rtrace process list */
114
115		struct rtproc   *rt_unproc = NULL;      /* unprocessed ray trees */
116
117	<	char    persistfn[] = "pfXXXXXX";       /* persist file name */
118	<	char    fmt[8];                         /* rtrace i/o format */
117	>	#define PERSIST_NONE    0               /* no persist file */
118	>	#define PERSIST_SINGLE  1               /* user set -P persist */
119	>	#define PERSIST_PARALL  2               /* user set -PP persist */
120	>	#define PERSIST_OURS    3               /* -PP persist belongs to us */
121	>	int     persist_state = PERSIST_NONE;   /* persist file state */
122	>	char    persistfn[] = "pfXXXXXX";       /* our persist file name, if set */
123
124		int             gargc;                  /* global argc */
125		char            **gargv;                /* global argv */
#	Line 92 | Line 131 | int            inpfmt = 'a';           /* input format */
131		int             outfmt = 'a';           /* output format */
132
133		int             header = 1;             /* output header? */
134	+	int             force_open = 0;         /* truncate existing output? */
135	+	int             recover = 0;            /* recover previous output? */
136	+	int             accumulate = 1;         /* input rays per output record */
137		int             xres = 0;               /* horiz. output resolution */
138		int             yres = 0;               /* vert. output resolution */
139
140	<	long            raysleft;               /* number of rays left to trace */
140	>	int             account;                /* current accumulation count */
141	>	unsigned long   raysleft;               /* number of rays left to trace */
142		long            waitflush;              /* how long until next flush */
143
144		unsigned long   lastray = 0;            /* last ray number sent */
#	Line 106 | Line 149 | int            using_stdout = 0;       /* are we using stdout? */
149		const char      *modname[MAXMODLIST];   /* ordered modifier name list */
150		int             nmods = 0;              /* number of modifiers */
151
152	<	MODCONT *addmodifier(char *modn, char *outf, char *binv);
152	>	#define queue_length()          (lastray - lastdone)
153
154	<	int done_rprocs(struct rtproc *rtp);
154	>	MODCONT *growmodifier(MODCONT *mp, int nb);
155	>	MODCONT *addmodifier(char *modn, char *outf, char *binv, int bincnt);
156	>	void addmodfile(char *fname, char *outf, char *binv, int bincnt);
157	>
158		void init(int np);
159	<	void tracecontribs(FILE *fp);
159	>	int done_rprocs(struct rtproc *rtp);
160	>	void reload_output(void);
161	>	void recover_output(FILE *fin);
162	>	void trace_contribs(FILE *fin);
163		struct rtproc *wait_rproc(void);
164		struct rtproc *get_rproc(void);
165	<	void process_rays(struct rtproc *rtp);
165	>	void queue_raytree(struct rtproc *rtp);
166	>	void process_queue(void);
167
168	<	void putcontrib(const DCOLOR cnt, FILE *fout);
168	>	void put_contrib(const DCOLOR cnt, FILE *fout);
169		void add_contrib(const char *modn);
170	<	void done_contrib(void);
170	>	void done_contrib(int navg);
171
172	+	/* return number of open rtrace processes */
173	+	static int
174	+	nrtprocs(void)
175	+	{
176	+	int     nrtp = 0;
177	+	struct rtproc   *rtp;
178	+
179	+	for (rtp = &rt0; rtp != NULL; rtp = rtp->next)
180	+	nrtp += rtp->pd.running;
181	+	return(nrtp);
182	+	}
183	+
184		/* set input/output format */
185		static void
186		setformat(const char *fmt)
187		{
188		switch (fmt[0]) {
127	–	case 'a':
189		case 'f':
190		case 'd':
191	+	SET_FILE_BINARY(stdin);
192	+	/* fall through */
193	+	case 'a':
194		inpfmt = fmt[0];
195		break;
196		default:
#	Line 156 | Line 220 | fmterr:
220		int
221		main(int argc, char *argv[])
222		{
223	+	int     contrib = 0;
224		int     nprocs = 1;
225		char    *curout = NULL;
226		char    *binval = NULL;
227	+	int     bincnt = 0;
228	+	char    fmt[8];
229		int     i, j;
230	+	/* need at least one argument */
231	+	if (argc < 2) {
232	+	fprintf(stderr,
233	+	"Usage: %s [-n nprocs][-V][-r][-e expr][-f source][-o ospec][-b binv] {-m mod | -M file} [rtrace options] octree\n",
234	+	argv[0]);
235	+	exit(1);
236	+	}
237		/* global program name */
238		gargv = argv;
239	<	/* set up calcomp mode */
239	>	/* initialize calcomp routines */
240		esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW;
241		esupport &= ~(E_OUTCHAN);
242	+	varset("PI", ':', PI);
243		/* get our options */
244		for (i = 1; i < argc-1; i++) {
245		/* expand arguments */
#	Line 178 | Line 253 | main(int argc, char *argv[])
253		if (argv[i][0] == '-')
254		switch (argv[i][1]) {
255		case 'n':               /* number of processes */
256	<	if (argv[i][2] || i >= argc-1) break;
256	>	if (argv[i][2] || i >= argc-2) break;
257		nprocs = atoi(argv[++i]);
258		if (nprocs <= 0)
259		error(USER, "illegal number of processes");
260		continue;
261	+	case 'V':               /* output contributions */
262	+	switch (argv[i][2]) {
263	+	case '\0':
264	+	contrib = !contrib;
265	+	continue;
266	+	case '+': case '1':
267	+	case 'T': case 't':
268	+	case 'Y': case 'y':
269	+	contrib = 1;
270	+	continue;
271	+	case '-': case '0':
272	+	case 'F': case 'f':
273	+	case 'N': case 'n':
274	+	contrib = 0;
275	+	continue;
276	+	}
277	+	break;
278	+	case 'c':               /* input rays per output */
279	+	if (argv[i][2] || i >= argc-2) break;
280	+	accumulate = atoi(argv[++i]);
281	+	continue;
282	+	case 'r':               /* recover output */
283	+	if (argv[i][2]) break;
284	+	recover = 1;
285	+	continue;
286		case 'h':               /* output header? */
287		switch (argv[i][2]) {
288		case '\0':
289		header = !header;
290		continue;
291	<	case '+': case '1': case 'T': case 't':
291	>	case '+': case '1':
292	>	case 'T': case 't':
293	>	case 'Y': case 'y':
294		header = 1;
295		continue;
296	<	case '-': case '0': case 'F': case 'f':
296	>	case '-': case '0':
297	>	case 'F': case 'f':
298	>	case 'N': case 'n':
299		header = 0;
300		continue;
301		}
302		break;
303	<	case 'f':               /* file or i/o format */
303	>	case 'f':               /* file or force or format */
304		if (!argv[i][2]) {
305	<	if (i >= argc-1) break;
306	<	fcompile(argv[++i]);
305	>	char    *fpath;
306	>	if (i >= argc-2) break;
307	>	fpath = getpath(argv[++i],
308	>	getrlibpath(), R_OK);
309	>	if (fpath == NULL) {
310	>	sprintf(errmsg,
311	>	"cannot find file '%s'",
312	>	argv[i]);
313	>	error(USER, errmsg);
314	>	}
315	>	fcompile(fpath);
316		continue;
317		}
318	+	if (argv[i][2] == 'o') {
319	+	force_open = 1;
320	+	continue;
321	+	}
322		setformat(argv[i]+2);
323		continue;
324		case 'e':               /* expression */
325	<	if (argv[i][2] || i >= argc-1) break;
325	>	if (argv[i][2] || i >= argc-2) break;
326		scompile(argv[++i], NULL, 0);
327		continue;
328		case 'o':               /* output file spec. */
329	<	if (argv[i][2] || i >= argc-1) break;
329	>	if (argv[i][2] || i >= argc-2) break;
330		curout = argv[++i];
331		continue;
332		case 'x':               /* horiz. output resolution */
333	<	if (argv[i][2] || i >= argc-1) break;
333	>	if (argv[i][2] || i >= argc-2) break;
334		xres = atoi(argv[++i]);
335		continue;
336		case 'y':               /* vert. output resolution */
337	<	if (argv[i][2] || i >= argc-1) break;
337	>	if (argv[i][2] || i >= argc-2) break;
338		yres = atoi(argv[++i]);
339		continue;
340	<	case 'b':               /* bin expression */
341	<	if (argv[i][2] || i >= argc-1) break;
340	>	case 'b':               /* bin expression/count */
341	>	if (i >= argc-2) break;
342	>	if (argv[i][2] == 'n') {
343	>	bincnt = atoi(argv[++i]);
344	>	continue;
345	>	}
346	>	if (argv[i][2]) break;
347		binval = argv[++i];
348		continue;
349		case 'm':               /* modifier name */
350	<	if (argv[i][2] || i >= argc-1) break;
350	>	if (argv[i][2] || i >= argc-2) break;
351		rtargv[rtargc++] = "-ti";
352		rtargv[rtargc++] = argv[++i];
353	<	addmodifier(argv[i], curout, binval);
353	>	addmodifier(argv[i], curout, binval, bincnt);
354		continue;
355	+	case 'M':               /* modifier file */
356	+	if (argv[i][2] || i >= argc-2) break;
357	+	rtargv[rtargc++] = "-tI";
358	+	rtargv[rtargc++] = argv[++i];
359	+	addmodfile(argv[i], curout, binval, bincnt);
360	+	continue;
361	+	case 'P':               /* persist file */
362	+	if (i >= argc-2) break;
363	+	persist_state = (argv[i][2] == 'P') ?
364	+	PERSIST_PARALL : PERSIST_SINGLE;
365	+	rtargv[rtargc++] = argv[i];
366	+	rtargv[rtargc++] = argv[++i];
367	+	continue;
368		}
369		rtargv[rtargc++] = argv[i];     /* assume rtrace option */
370		}
371	+	if (accumulate <= 0)    /* no output flushing for single record */
372	+	xres = yres = 0;
373		/* set global argument list */
374		gargc = argc; gargv = argv;
375		/* add "mandatory" rtrace settings */
376		for (j = 0; myrtopts[j] != NULL; j++)
377		rtargv[rtargc++] = myrtopts[j];
378	+	rtargv[rtargc++] = contrib ? RTCONTRIB : RTCOEFF;
379		/* just asking for defaults? */
380		if (!strcmp(argv[i], "-defaults")) {
381		char    sxres[16], syres[16];
382		char    *rtpath;
383	<	printf("-n  %-2d\t\t\t\t# number of processes\n", nprocs);
383	>	printf("-n %-2d\t\t\t\t# number of processes\n", nprocs);
384	>	printf("-c %-5d\t\t\t# accumulated rays per record\n",
385	>	accumulate);
386	>	printf("-V%c\t\t\t\t# output %s\n", contrib ? '+' : '-',
387	>	contrib ? "contributions" : "coefficients");
388		fflush(stdout);                 /* report OUR options */
389		rtargv[rtargc++] = header ? "-h+" : "-h-";
390		sprintf(fmt, "-f%c%c", inpfmt, outfmt);
#	Line 253 | Line 395 | main(int argc, char *argv[])
395		rtargv[rtargc++] = "-y";
396		sprintf(syres, "%d", yres);
397		rtargv[rtargc++] = syres;
256	–	rtargv[rtargc++] = "-oTW";
398		rtargv[rtargc++] = "-defaults";
399		rtargv[rtargc] = NULL;
400		rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
#	Line 265 | Line 406 | main(int argc, char *argv[])
406		execv(rtpath, rtargv);
407		perror(rtpath); /* execv() should not return */
408		exit(1);
409	<	} else if (nprocs > 1) {        /* add persist file if parallel */
410	<	rtargv[rtargc++] = "-PP";
411	<	rtargv[rtargc++] = mktemp(persistfn);
409	>	}
410	>	if (nprocs > 1) {       /* add persist file if parallel */
411	>	if (persist_state == PERSIST_SINGLE)
412	>	error(USER, "use -PP option for multiple processes");
413	>	if (persist_state == PERSIST_NONE) {
414	>	rtargv[rtargc++] = "-PP";
415	>	rtargv[rtargc++] = mktemp(persistfn);
416	>	persist_state = PERSIST_OURS;
417	>	}
418		}
419		/* add format string */
420		sprintf(fmt, "-f%cf", inpfmt);
#	Line 277 | Line 424 | main(int argc, char *argv[])
424		error(USER, "missing octree argument");
425		rtargv[rtargc++] = octree = argv[i];
426		rtargv[rtargc] = NULL;
427	<	/* start rtrace & compute contributions */
427	>	/* start rtrace & recover if requested */
428		init(nprocs);
429	<	tracecontribs(stdin);
429	>	/* compute contributions */
430	>	trace_contribs(stdin);
431	>	/* clean up */
432		quit(0);
433		}
434
435	+	#ifndef SIGALRM
436	+	#define SIGALRM SIGTERM
437	+	#endif
438		/* kill persistent rtrace process */
439		static void
440		killpersist(void)
441		{
442		FILE    *fp = fopen(persistfn, "r");
443	<	int     pid;
443	>	RT_PID  pid;
444
445		if (fp == NULL)
446		return;
#	Line 322 | Line 474 | quit(int status)
474		{
475		int     rtstat;
476
477	<	if (rt0.next != NULL)           /* terminate persistent rtrace */
477	>	if (persist_state == PERSIST_OURS)  /* terminate waiting rtrace */
478		killpersist();
479		/* clean up rtrace process(es) */
480		rtstat = done_rprocs(&rt0);
#	Line 331 | Line 483 | quit(int status)
483		exit(status);                   /* flushes all output streams */
484		}
485
486	<	/* start rtrace and initialize buffers */
486	>	/* start rtrace processes and initialize */
487		void
488		init(int np)
489		{
#	Line 345 | Line 497 | init(int np)
497		scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0);
498		scompile("Px=$4;Py=$5;Pz=$6;", NULL, 0);
499		/* set up signal handling */
500	<	#ifdef SIGPIPE /* not present on Windows */
500	>	signal(SIGINT, quit);
501	>	#ifdef SIGHUP
502	>	signal(SIGHUP, quit);
503	>	#endif
504	>	#ifdef SIGTERM
505	>	signal(SIGTERM, quit);
506	>	#endif
507	>	#ifdef SIGPIPE
508		signal(SIGPIPE, quit);
509		#endif
510		rtp = &rt0;                     /* start rtrace process(es) */
#	Line 377 | Line 536 | init(int np)
536		rtp->next = NULL;               /* terminate list */
537		if (yres > 0) {
538		if (xres > 0)
539	<	raysleft = xres*yres;
539	>	raysleft = (unsigned long)xres*yres;
540		else
541		raysleft = yres;
542		} else
543		raysleft = 0;
544	+	if ((account = accumulate) > 0)
545	+	raysleft *= accumulate;
546		waitflush = xres;
547	+	if (!recover)
548	+	return;
549	+	/* recover previous values */
550	+	if (accumulate <= 0)
551	+	reload_output();
552	+	else
553	+	recover_output(stdin);
554		}
555
556	+	/* grow modifier to accommodate more bins */
557	+	MODCONT *
558	+	growmodifier(MODCONT *mp, int nb)
559	+	{
560	+	if (nb <= mp->nbins)
561	+	return mp;
562	+	mp = (MODCONT *)realloc(mp, sizeof(MODCONT) + sizeof(DCOLOR)*(nb-1));
563	+	if (mp == NULL)
564	+	error(SYSTEM, "out of memory in growmodifier");
565	+	memset(mp->cbin+mp->nbins, 0, sizeof(DCOLOR)*(nb-mp->nbins));
566	+	mp->nbins = nb;
567	+	return mp;
568	+	}
569	+
570		/* add modifier to our list to track */
571		MODCONT *
572	<	addmodifier(char *modn, char *outf, char *binv)
572	>	addmodifier(char *modn, char *outf, char *binv, int bincnt)
573		{
574		LUENT   *lep = lu_find(&modconttab, modn);
575		MODCONT *mp;
576	+	int     i;
577
578		if (lep->data != NULL) {
579		sprintf(errmsg, "duplicate modifier '%s'", modn);
#	Line 403 | Line 586 | addmodifier(char *modn, char *outf, char *binv)
586		mp = (MODCONT *)malloc(sizeof(MODCONT));
587		if (mp == NULL)
588		error(SYSTEM, "out of memory in addmodifier");
406	–	lep->data = (char *)mp;
589		mp->outspec = outf;             /* XXX assumes static string */
590		mp->modname = modn;             /* XXX assumes static string */
591		if (binv != NULL)
#	Line 412 | Line 594 | addmodifier(char *modn, char *outf, char *binv)
594		mp->binv = eparse("0");
595		mp->nbins = 1;
596		setcolor(mp->cbin[0], 0., 0., 0.);
597	+	if (mp->binv->type == NUM)      /* assume one bin if constant */
598	+	bincnt = 1;
599	+	else if (bincnt > 1)
600	+	mp = growmodifier(mp, bincnt);
601	+	lep->data = (char *)mp;
602	+	/* allocate output streams */
603	+	for (i = bincnt; i-- > 0; )
604	+	getostream(mp->outspec, mp->modname, i, 1);
605		return mp;
606		}
607
608	+	/* add modifiers from a file list */
609	+	void
610	+	addmodfile(char *fname, char *outf, char *binv, int bincnt)
611	+	{
612	+	char    *mname[MAXMODLIST];
613	+	int     i;
614	+	/* find the file & store strings */
615	+	if (wordfile(mname, getpath(fname, getrlibpath(), R_OK)) < 0) {
616	+	sprintf(errmsg, "cannot find modifier file '%s'", fname);
617	+	error(SYSTEM, errmsg);
618	+	}
619	+	for (i = 0; mname[i]; i++)      /* add each one */
620	+	addmodifier(mname[i], outf, binv, bincnt);
621	+	}
622	+
623		/* put string to stderr */
624		void
625		eputs(char  *s)
#	Line 430 | Line 635 | eputs(char  *s)
635		midline = s[strlen(s)-1] != '\n';
636		}
637
638	+	/* construct output file name and return flags whether modifier/bin present */
639	+	int
640	+	ofname(char *oname, const char *ospec, const char *mname, int bn)
641	+	{
642	+	const char      *mnp = NULL;
643	+	const char      *bnp = NULL;
644	+	const char      *cp;
645	+
646	+	if (ospec == NULL)
647	+	return -1;
648	+	for (cp = ospec; *cp; cp++)             /* check format position(s) */
649	+	if (*cp == '%') {
650	+	do
651	+	++cp;
652	+	while (isdigit(*cp));
653	+	switch (*cp) {
654	+	case '%':
655	+	break;
656	+	case 's':
657	+	if (mnp != NULL)
658	+	return -1;
659	+	mnp = cp;
660	+	break;
661	+	case 'd':
662	+	if (bnp != NULL)
663	+	return -1;
664	+	bnp = cp;
665	+	break;
666	+	default:
667	+	return -1;
668	+	}
669	+	}
670	+	if (mnp != NULL) {                      /* create file name */
671	+	if (bnp != NULL) {
672	+	if (bnp > mnp)
673	+	sprintf(oname, ospec, mname, bn);
674	+	else
675	+	sprintf(oname, ospec, bn, mname);
676	+	return OF_MODIFIER|OF_BIN;
677	+	}
678	+	sprintf(oname, ospec, mname);
679	+	return OF_MODIFIER;
680	+	}
681	+	if (bnp != NULL) {
682	+	sprintf(oname, ospec, bn);
683	+	return OF_BIN;
684	+	}
685	+	strcpy(oname, ospec);
686	+	return 0;
687	+	}
688	+
689		/* write header to the given output stream */
690		void
691	<	printheader(FILE *fout)
691	>	printheader(FILE *fout, const char *info)
692		{
693		extern char     VersionID[];
694		FILE            *fin = fopen(octree, "r");
#	Line 444 | Line 700 | printheader(FILE *fout)
700		printargs(gargc-1, gargv, fout);        /* add our command */
701		fprintf(fout, "SOFTWARE= %s\n", VersionID);
702		fputnow(fout);
703	+	if (info != NULL)                       /* add extra info if given */
704	+	fputs(info, fout);
705		switch (outfmt) {                       /* add output format */
706		case 'a':
707		fputformat("ascii", fout);
#	Line 459 | Line 717 | printheader(FILE *fout)
717		break;
718		}
719		fputc('\n', fout);
720	<	if (xres > 0) {
721	<	if (yres > 0)                   /* resolution string */
722	<	fprtresolu(xres, yres, fout);
720	>	}
721	>
722	>	/* write resolution string to given output stream */
723	>	void
724	>	printresolu(FILE *fout, int xr, int yr)
725	>	{
726	>	if ((xr > 0) & (yr > 0))        /* resolution string */
727	>	fprtresolu(xr, yr, fout);
728	>	if (xres > 0)                   /* global flush flag */
729		fflush(fout);
466	–	}
730		}
731
732	<	/* Get output file pointer (open and write header if new) */
733	<	FILE *
734	<	getofile(const char *ospec, const char *mname, int bn)
732	>	/* Get output stream pointer (open and write header if new and noopen==0) */
733	>	STREAMOUT *
734	>	getostream(const char *ospec, const char *mname, int bn, int noopen)
735		{
736	<	const char      *mnp = NULL;
737	<	const char      *bnp = NULL;
738	<	const char      *cp;
739	<	char            ofname[1024];
740	<	LUENT           *lep;
736	>	static const DCOLOR     nocontrib = BLKCOLOR;
737	>	static STREAMOUT        stdos;
738	>	int                     ofl;
739	>	char                    oname[1024];
740	>	LUENT                   *lep;
741	>	STREAMOUT               *sop;
742
743		if (ospec == NULL) {                    /* use stdout? */
744	<	if (!using_stdout && header)
745	<	printheader(stdout);
746	<	using_stdout = 1;
747	<	return stdout;
744	>	if (!noopen && !using_stdout) {
745	>	if (outfmt != 'a')
746	>	SET_FILE_BINARY(stdout);
747	>	if (header)
748	>	printheader(stdout, NULL);
749	>	printresolu(stdout, xres, yres);
750	>	stdos.xr = xres; stdos.yr = yres;
751	>	using_stdout = 1;
752	>	}
753	>	stdos.ofp = stdout;
754	>	stdos.reclen += noopen;
755	>	return &stdos;
756		}
757	<	for (cp = ospec; *cp; cp++)             /* check format position(s) */
758	<	if (*cp == '%') {
759	<	do
760	<	++cp;
761	<	while (isdigit(*cp));
762	<	switch (*cp) {
763	<	case '%':
764	<	break;
765	<	case 's':
766	<	if (mnp != NULL)
767	<	goto badspec;
768	<	mnp = cp;
769	<	break;
770	<	case 'd':
771	<	if (bnp != NULL)
772	<	goto badspec;
773	<	bnp = cp;
774	<	break;
775	<	default:
776	<	goto badspec;
757	>	ofl = ofname(oname, ospec, mname, bn);  /* get output name */
758	>	if (ofl < 0) {
759	>	sprintf(errmsg, "bad output format '%s'", ospec);
760	>	error(USER, errmsg);
761	>	}
762	>	lep = lu_find(&ofiletab, oname);        /* look it up */
763	>	if (lep->key == NULL)                   /* new entry */
764	>	lep->key = strcpy((char *)malloc(strlen(oname)+1), oname);
765	>	sop = (STREAMOUT *)lep->data;
766	>	if (sop == NULL) {                      /* allocate stream */
767	>	sop = (STREAMOUT *)malloc(sizeof(STREAMOUT));
768	>	if (sop == NULL)
769	>	error(SYSTEM, "out of memory in getostream");
770	>	sop->outpipe = oname[0] == '!';
771	>	sop->reclen = 0;
772	>	sop->ofp = NULL;                /* open iff noopen==0 */
773	>	sop->xr = xres; sop->yr = yres;
774	>	lep->data = (char *)sop;
775	>	if (!sop->outpipe & !force_open & !recover &&
776	>	access(oname, F_OK) == 0) {
777	>	errno = EEXIST;         /* file exists */
778	>	goto openerr;
779	>	}
780	>	}
781	>	if (!noopen && sop->ofp == NULL) {      /* open output stream */
782	>	long            i;
783	>	if (oname[0] == '!')            /* output to command */
784	>	sop->ofp = popen(oname+1, "w");
785	>	else                            /* else open file */
786	>	sop->ofp = fopen(oname, "w");
787	>	if (sop->ofp == NULL)
788	>	goto openerr;
789	>	if (outfmt != 'a')
790	>	SET_FILE_BINARY(sop->ofp);
791	>	if (header) {
792	>	char    info[512];
793	>	char    *cp = info;
794	>	if (ofl & OF_MODIFIER || sop->reclen == 1) {
795	>	sprintf(cp, "MODIFIER=%s\n", mname);
796	>	while (*cp) ++cp;
797		}
798	+	if (ofl & OF_BIN) {
799	+	sprintf(cp, "BIN=%d\n", bn);
800	+	while (*cp) ++cp;
801	+	}
802	+	*cp = '\0';
803	+	printheader(sop->ofp, info);
804		}
805	<	if (mnp != NULL) {                      /* create file name */
806	<	if (bnp != NULL) {
509	<	if (bnp > mnp)
510	<	sprintf(ofname, ospec, mname, bn);
511	<	else
512	<	sprintf(ofname, ospec, bn, mname);
513	<	} else
514	<	sprintf(ofname, ospec, mname);
515	<	} else if (bnp != NULL)
516	<	sprintf(ofname, ospec, bn);
517	<	else
518	<	strcpy(ofname, ospec);
519	<	lep = lu_find(&ofiletab, ofname);       /* look it up */
520	<	if (lep->key == NULL)                   /* new entry */
521	<	lep->key = strcpy((char *)malloc(strlen(ofname)+1), ofname);
522	<	if (lep->data == NULL) {                /* open output file */
523	<	FILE            *fp = fopen(ofname, "w");
524	<	int             i;
525	<	if (fp == NULL) {
526	<	sprintf(errmsg, "cannot open '%s' for writing", ofname);
527	<	error(SYSTEM, errmsg);
805	>	if (accumulate > 0) {           /* global resolution */
806	>	sop->xr = xres; sop->yr = yres;
807		}
808	<	if (header)
530	<	printheader(fp);
808	>	printresolu(sop->ofp, sop->xr, sop->yr);
809		/* play catch-up */
810	<	for (i = 0; i < lastdone; i++) {
811	<	static const DCOLOR     nocontrib = BLKCOLOR;
812	<	putcontrib(nocontrib, fp);
810	>	for (i = accumulate > 0 ? lastdone/accumulate : 0; i--; ) {
811	>	int     j = sop->reclen;
812	>	if (j <= 0) j = 1;
813	>	while (j--)
814	>	put_contrib(nocontrib, sop->ofp);
815		if (outfmt == 'a')
816	<	putc('\n', fp);
816	>	putc('\n', sop->ofp);
817		}
818		if (xres > 0)
819	<	fflush(fp);
540	<	lep->data = (char *)fp;
819	>	fflush(sop->ofp);
820		}
821	<	return (FILE *)lep->data;               /* return open file pointer */
822	<	badspec:
823	<	sprintf(errmsg, "bad output format '%s'", ospec);
824	<	error(USER, errmsg);
825	<	return NULL;            /* pro forma return */
821	>	sop->reclen += noopen;                  /* add to length if noopen */
822	>	return sop;                             /* return output stream */
823	>	openerr:
824	>	sprintf(errmsg, "cannot open '%s' for writing", oname);
825	>	error(SYSTEM, errmsg);
826	>	return NULL;    /* pro forma return */
827		}
828
829		/* read input ray into buffer */
830		int
831		getinp(char *buf, FILE *fp)
832		{
833	+	double  dv[3], *dvp;
834	+	float   *fvp;
835	+	char    *cp;
836	+	int     i;
837	+
838		switch (inpfmt) {
839		case 'a':
840	<	if (fgets(buf, 128, fp) == NULL)
841	<	return 0;
840	>	cp = buf;               /* make sure we get 6 floats */
841	>	for (i = 0; i < 6; i++) {
842	>	if (fgetword(cp, buf+127-cp, fp) == NULL)
843	>	return -1;
844	>	if (i >= 3)
845	>	dv[i-3] = atof(cp);
846	>	if ((cp = fskip(cp)) == NULL || *cp)
847	>	return -1;
848	>	*cp++ = ' ';
849	>	}
850	>	getc(fp);               /* get/put eol */
851	>	*cp-- = '\0'; *cp = '\n';
852	>	if (DOT(dv,dv) <= FTINY*FTINY)
853	>	return 0;       /* dummy ray */
854		return strlen(buf);
855		case 'f':
856		if (fread(buf, sizeof(float), 6, fp) < 6)
857	<	return 0;
857	>	return -1;
858	>	fvp = (float *)buf + 3;
859	>	if (DOT(fvp,fvp) <= FTINY*FTINY)
860	>	return 0;       /* dummy ray */
861		return sizeof(float)*6;
862		case 'd':
863		if (fread(buf, sizeof(double), 6, fp) < 6)
864	<	return 0;
864	>	return -1;
865	>	dvp = (double *)buf + 3;
866	>	if (DOT(dvp,dvp) <= FTINY*FTINY)
867	>	return 0;       /* dummy ray */
868		return sizeof(double)*6;
869		}
870		error(INTERNAL, "botched input format");
871	<	return 0;       /* pro forma return */
871	>	return -1;      /* pro forma return */
872		}
873
874		static float    rparams[9];             /* traced ray parameters */
#	Line 595 | Line 898 | add_contrib(const char *modn)
898		bn = (int)(evalue(mp->binv) + .5);
899		if (bn <= 0)
900		bn = 0;
901	<	else if (bn > mp->nbins) {      /* new bin */
902	<	mp = (MODCONT *)realloc(mp, sizeof(MODCONT) +
600	<	bn*sizeof(DCOLOR));
601	<	if (mp == NULL)
602	<	error(SYSTEM, "out of memory in add_contrib");
603	<	memset(mp->cbin+mp->nbins, 0, sizeof(DCOLOR)*(bn+1-mp->nbins));
604	<	mp->nbins = bn+1;
605	<	le->data = (char *)mp;
606	<	}
901	>	else if (bn >= mp->nbins)       /* new bin */
902	>	le->data = (char *)(mp = growmodifier(mp, bn+1));
903		addcolor(mp->cbin[bn], rparams);
904		}
905
#	Line 611 | Line 907 | add_contrib(const char *modn)
907		static int
908		puteol(const LUENT *e, void *p)
909		{
910	<	FILE    *fp = (FILE *)e->data;
910	>	STREAMOUT       *sop = (STREAMOUT *)e->data;
911
912		if (outfmt == 'a')
913	<	putc('\n', fp);
913	>	putc('\n', sop->ofp);
914		if (!waitflush)
915	<	fflush(fp);
916	<	if (ferror(fp)) {
915	>	fflush(sop->ofp);
916	>	if (ferror(sop->ofp)) {
917		sprintf(errmsg, "write error on file '%s'", e->key);
918		error(SYSTEM, errmsg);
919		}
#	Line 626 | Line 922 | puteol(const LUENT *e, void *p)
922
923		/* put out ray contribution to file */
924		void
925	<	putcontrib(const DCOLOR cnt, FILE *fout)
925	>	put_contrib(const DCOLOR cnt, FILE *fout)
926		{
927		float   fv[3];
928		COLR    cv;
#	Line 636 | Line 932 | putcontrib(const DCOLOR cnt, FILE *fout)
932		fprintf(fout, "%.6e\t%.6e\t%.6e\t", cnt[0], cnt[1], cnt[2]);
933		break;
934		case 'f':
935	<	fv[0] = cnt[0];
640	<	fv[1] = cnt[1];
641	<	fv[2] = cnt[2];
935	>	copycolor(fv, cnt);
936		fwrite(fv, sizeof(float), 3, fout);
937		break;
938		case 'd':
#	Line 653 | Line 947 | putcontrib(const DCOLOR cnt, FILE *fout)
947		}
948		}
949
950	<	/* output ray tallies and clear for next primary */
950	>	/* output ray tallies and clear for next accumulation */
951		void
952	<	done_contrib(void)
952	>	done_contrib(int navg)
953		{
954	<	int     i, j;
955	<	MODCONT *mp;
954	>	double          sf = 1.;
955	>	int             i, j;
956	>	MODCONT         *mp;
957	>	STREAMOUT       *sop;
958	>	/* set average scaling */
959	>	if (navg > 1)
960	>	sf = 1. / (double)navg;
961		/* output modifiers in order */
962		for (i = 0; i < nmods; i++) {
963		mp = (MODCONT *)lu_find(&modconttab,modname[i])->data;
964	<	for (j = 0; j < mp->nbins; j++)
965	<	putcontrib(mp->cbin[j],
966	<	getofile(mp->outspec, mp->modname, j));
967	<	/* clear for next ray tree */
964	>	if (navg > 1)                   /* average scaling */
965	>	for (j = mp->nbins; j--; )
966	>	scalecolor(mp->cbin[j], sf);
967	>	sop = getostream(mp->outspec, mp->modname, 0,0);
968	>	put_contrib(mp->cbin[0], sop->ofp);
969	>	if (mp->nbins > 3 &&            /* minor optimization */
970	>	sop == getostream(mp->outspec, mp->modname, 1,0))
971	>	for (j = 1; j < mp->nbins; j++)
972	>	put_contrib(mp->cbin[j], sop->ofp);
973	>	else
974	>	for (j = 1; j < mp->nbins; j++)
975	>	put_contrib(mp->cbin[j],
976	>	getostream(mp->outspec,mp->modname,j,0)->ofp);
977	>	/* clear for next time */
978		memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
979		}
980		--waitflush;                            /* terminate records */
#	Line 679 | Line 988 | done_contrib(void)
988		}
989		}
990
991	<	/* process (or save) ray tree produced by rtrace process */
991	>	/* queue completed ray tree produced by rtrace process */
992		void
993	<	process_rays(struct rtproc *rtp)
993	>	queue_raytree(struct rtproc *rtp)
994		{
995	<	struct rtproc   *rtu;
996	<	/* check if time to process it */
997	<	if (rtp->raynum == lastdone+1) {
995	>	struct rtproc   *rtu, *rtl = NULL;
996	>	/* insert following ray order */
997	>	for (rtu = rt_unproc; rtu != NULL; rtu = (rtl=rtu)->next)
998	>	if (rtp->raynum < rtu->raynum)
999	>	break;
1000	>	rtu = (struct rtproc *)malloc(sizeof(struct rtproc));
1001	>	if (rtu == NULL)
1002	>	error(SYSTEM, "out of memory in queue_raytree");
1003	>	*rtu = *rtp;
1004	>	if (rtl == NULL) {
1005	>	rtu->next = rt_unproc;
1006	>	rt_unproc = rtu;
1007	>	} else {
1008	>	rtu->next = rtl->next;
1009	>	rtl->next = rtu;
1010	>	}
1011	>	rtp->raynum = 0;                /* clear path for next ray tree */
1012	>	rtp->bsiz = 0;
1013	>	rtp->buf = NULL;
1014	>	rtp->nbr = 0;
1015	>	}
1016	>
1017	>	/* process completed ray trees from our queue */
1018	>	void
1019	>	process_queue(void)
1020	>	{
1021	>	char    modname[128];
1022	>	/* ray-ordered queue */
1023	>	while (rt_unproc != NULL && rt_unproc->raynum == lastdone+1) {
1024	>	struct rtproc   *rtp = rt_unproc;
1025		int             n = rtp->nbr;
1026		const char      *cp = rtp->buf;
691	–	char            modname[128];
1027		while (n > 0) {         /* process rays */
1028		register char   *mnp = modname;
1029		/* skip leading tabs */
#	Line 698 | Line 1033 | process_rays(struct rtproc *rtp)
1033		if (!n || !(isalpha(*cp) | (*cp == '_')))
1034		error(USER, "bad modifier name from rtrace");
1035		/* get modifier name */
1036	<	while (n > 0 && *cp != '\t') {
1036	>	while (n > 1 && *cp != '\t') {
1037	>	if (mnp - modname >= sizeof(modname)-2)
1038	>	error(INTERNAL, "modifier name too long");
1039		*mnp++ = *cp++; n--;
1040		}
1041		*mnp = '\0';
#	Line 710 | Line 1047 | process_rays(struct rtproc *rtp)
1047		cp += sizeof(float)*9; n -= sizeof(float)*9;
1048		add_contrib(modname);
1049		}
1050	<	done_contrib();         /* sum up contributions & output */
1050	>	/* time to produce record? */
1051	>	if (account > 0 && !--account)
1052	>	done_contrib(account = accumulate);
1053		lastdone = rtp->raynum;
1054	<	free(rtp->buf);
1055	<	/* catch up with unprocessed list */
1056	<	while (rt_unproc != NULL && rt_unproc->raynum == lastdone+1) {
1057	<	process_rays(rt_unproc);
719	<	rt_unproc = (rtu=rt_unproc)->next;
720	<	free(rtu);
721	<	}
722	<	} else {                        /* else insert in unprocessed list */
723	<	struct rtproc   *rtl = NULL;
724	<	for (rtu = rt_unproc; rtu != NULL; rtu = (rtl=rtu)->next)
725	<	if (rtp->raynum < rtu->raynum)
726	<	break;
727	<	rtu = (struct rtproc *)malloc(sizeof(struct rtproc));
728	<	if (rtu == NULL)
729	<	error(SYSTEM, "out of memory in process_rays");
730	<	*rtu = *rtp;
731	<	if (rtl == NULL) {
732	<	rtu->next = rt_unproc;
733	<	rt_unproc = rtu;
734	<	} else {
735	<	rtu->next = rtl->next;
736	<	rtl->next = rtu;
737	<	}
1054	>	if (rtp->buf != NULL)   /* free up buffer space */
1055	>	free(rtp->buf);
1056	>	rt_unproc = rtp->next;
1057	>	free(rtp);              /* done with this ray tree */
1058		}
739	–	rtp->raynum = 0;                /* clear path for next ray tree */
740	–	rtp->bsiz = 0;
741	–	rtp->buf = NULL;
742	–	rtp->nbr = 0;
1059		}
1060
1061		/* wait for rtrace process to finish with ray tree */
#	Line 784 | Line 1100 | wait_rproc(void)
1100		if (rt->bsiz + BUFSIZ <= treebufsiz)
1101		rt->bsiz = treebufsiz;
1102		else
1103	<	rt->bsiz = treebufsiz += BUFSIZ;
1103	>	treebufsiz = rt->bsiz += BUFSIZ;
1104		rt->buf = (char *)realloc(rt->buf, rt->bsiz);
1105		}
1106		if (rt->buf == NULL)
#	Line 796 | Line 1112 | wait_rproc(void)
1112		if (rt->nbr >= 4 && !memcmp(rt->buf+rt->nbr-4,
1113		"~\t~\t", 4)) {
1114		rt->nbr -= 4;   /* elide terminator */
1115	<	process_rays(rt);
1115	>	queue_raytree(rt);
1116		rtfree = rt;    /* ready for next ray */
1117		}
1118		}
#	Line 818 | Line 1134 | get_rproc(void)
1134
1135		/* trace ray contributions (main loop) */
1136		void
1137	<	tracecontribs(FILE *fin)
1137	>	trace_contribs(FILE *fin)
1138		{
1139	+	static int      ignore_warning_given = 0;
1140		char            inpbuf[128];
1141		int             iblen;
1142		struct rtproc   *rtp;
1143		/* loop over input */
1144	<	while ((iblen = getinp(inpbuf, fin)) > 0) {
1145	<	if (lastray+1 < lastray) {      /* counter rollover? */
1144	>	while ((iblen = getinp(inpbuf, fin)) >= 0) {
1145	>	if (!iblen && accumulate != 1) {
1146	>	if (!ignore_warning_given++)
1147	>	error(WARNING,
1148	>	"dummy ray(s) ignored during accumulation\n");
1149	>	continue;
1150	>	}
1151	>	if (!iblen ||                   /* need reset? */
1152	>	queue_length() > 10*nrtprocs() ||
1153	>	lastray+1 < lastray) {
1154		while (wait_rproc() != NULL)
1155	<	;
1156	<	lastdone = lastray = 0;
1155	>	process_queue();
1156	>	if (lastray+1 < lastray)
1157	>	lastdone = lastray = 0;
1158		}
1159		rtp = get_rproc();              /* get avail. rtrace process */
1160	<	rtp->raynum = ++lastray;        /* assign this ray to it */
1161	<	writebuf(rtp->pd.w, inpbuf, iblen);
1162	<	if (!--raysleft)
1163	<	break;                  /* explicit EOF */
1160	>	rtp->raynum = ++lastray;        /* assign ray */
1161	>	if (iblen) {                    /* trace ray if valid */
1162	>	writebuf(rtp->pd.w, inpbuf, iblen);
1163	>	} else {                        /* else bypass dummy ray */
1164	>	queue_raytree(rtp);     /* empty tree */
1165	>	if ((yres <= 0) | (waitflush > 1))
1166	>	waitflush = 1;  /* flush after this */
1167	>	}
1168	>	process_queue();                /* catch up with results */
1169	>	if (raysleft && !--raysleft)
1170	>	break;                  /* preemptive EOI */
1171		}
1172		while (wait_rproc() != NULL)            /* process outstanding rays */
1173	<	;
1174	<	if (raysleft > 0)
1173	>	process_queue();
1174	>	if (accumulate <= 0)
1175	>	done_contrib(0);                /* output tallies */
1176	>	else if (account < accumulate) {
1177	>	error(WARNING, "partial accumulation in final record");
1178	>	done_contrib(accumulate - account);
1179	>	}
1180	>	if (raysleft)
1181		error(USER, "unexpected EOF on input");
1182	+	lu_done(&ofiletab);                     /* close output files */
1183	+	}
1184	+
1185	+	/* get ray contribution from previous file */
1186	+	static int
1187	+	get_contrib(DCOLOR cnt, FILE *finp)
1188	+	{
1189	+	COLOR   fv;
1190	+	COLR    cv;
1191	+
1192	+	switch (outfmt) {
1193	+	case 'a':
1194	+	return(fscanf(finp,"%lf %lf %lf",&cnt[0],&cnt[1],&cnt[2]) == 3);
1195	+	case 'f':
1196	+	if (fread(fv, sizeof(fv[0]), 3, finp) != 3)
1197	+	return(0);
1198	+	copycolor(cnt, fv);
1199	+	return(1);
1200	+	case 'd':
1201	+	return(fread(cnt, sizeof(cnt[0]), 3, finp) == 3);
1202	+	case 'c':
1203	+	if (fread(cv, sizeof(cv), 1, finp) != 1)
1204	+	return(0);
1205	+	colr_color(fv, cv);
1206	+	copycolor(cnt, fv);
1207	+	return(1);
1208	+	default:
1209	+	error(INTERNAL, "botched output format");
1210	+	}
1211	+	return(0);      /* pro forma return */
1212	+	}
1213	+
1214	+	/* close output file opened for input */
1215	+	static int
1216	+	myclose(const LUENT *e, void *p)
1217	+	{
1218	+	STREAMOUT       *sop = (STREAMOUT *)e->data;
1219	+
1220	+	if (sop->ofp == NULL)
1221	+	return(0);
1222	+	fclose(sop->ofp);
1223	+	sop->ofp = NULL;
1224	+	return(0);
1225	+	}
1226	+
1227	+	/* load previously accumulated values */
1228	+	void
1229	+	reload_output(void)
1230	+	{
1231	+	int             i, j;
1232	+	MODCONT         *mp;
1233	+	int             ofl;
1234	+	char            oname[1024];
1235	+	char            *fmode = "rb";
1236	+	char            *outvfmt;
1237	+	LUENT           *ment, *oent;
1238	+	int             xr, yr;
1239	+	STREAMOUT       sout;
1240	+	DCOLOR          rgbv;
1241	+
1242	+	switch (outfmt) {
1243	+	case 'a':
1244	+	outvfmt = "ascii";
1245	+	fmode = "r";
1246	+	break;
1247	+	case 'f':
1248	+	outvfmt = "float";
1249	+	break;
1250	+	case 'd':
1251	+	outvfmt = "double";
1252	+	break;
1253	+	case 'c':
1254	+	outvfmt = COLRFMT;
1255	+	break;
1256	+	default:
1257	+	error(INTERNAL, "botched output format");
1258	+	return;
1259	+	}
1260	+	/* reload modifier values */
1261	+	for (i = 0; i < nmods; i++) {
1262	+	ment = lu_find(&modconttab,modname[i]);
1263	+	mp = (MODCONT *)ment->data;
1264	+	if (mp->outspec == NULL)
1265	+	error(USER, "cannot reload from stdout");
1266	+	if (mp->outspec[0] == '!')
1267	+	error(USER, "cannot reload from command");
1268	+	for (j = 0; ; j++) {            /* load each modifier bin */
1269	+	ofl = ofname(oname, mp->outspec, mp->modname, j);
1270	+	if (ofl < 0)
1271	+	error(USER, "bad output file specification");
1272	+	oent = lu_find(&ofiletab, oname);
1273	+	if (oent->data != NULL) {
1274	+	sout = *(STREAMOUT *)oent->data;
1275	+	} else {
1276	+	sout.reclen = 0;
1277	+	sout.outpipe = 0;
1278	+	sout.xr = xres; sout.yr = yres;
1279	+	sout.ofp = NULL;
1280	+	}
1281	+	if (sout.ofp == NULL) { /* open output as input */
1282	+	sout.ofp = fopen(oname, fmode);
1283	+	if (sout.ofp == NULL) {
1284	+	if (j)
1285	+	break;  /* assume end of modifier */
1286	+	sprintf(errmsg, "missing reload file '%s'",
1287	+	oname);
1288	+	error(WARNING, errmsg);
1289	+	break;
1290	+	}
1291	+	if (header && checkheader(sout.ofp, outvfmt, NULL) != 1) {
1292	+	sprintf(errmsg, "format mismatch for '%s'",
1293	+	oname);
1294	+	error(USER, errmsg);
1295	+	}
1296	+	if ((sout.xr > 0) & (sout.yr > 0) &&
1297	+	(!fscnresolu(&xr, &yr, sout.ofp) ||
1298	+	(xr != sout.xr) |
1299	+	(yr != sout.yr))) {
1300	+	sprintf(errmsg, "resolution mismatch for '%s'",
1301	+	oname);
1302	+	error(USER, errmsg);
1303	+	}
1304	+	}
1305	+	/* read in RGB value */
1306	+	if (!get_contrib(rgbv, sout.ofp)) {
1307	+	if (!j) {
1308	+	fclose(sout.ofp);
1309	+	break;          /* ignore empty file */
1310	+	}
1311	+	if (j < mp->nbins) {
1312	+	sprintf(errmsg, "missing data in '%s'",
1313	+	oname);
1314	+	error(USER, errmsg);
1315	+	}
1316	+	break;
1317	+	}
1318	+	if (j >= mp->nbins)             /* grow modifier size */
1319	+	ment->data = (char *)(mp = growmodifier(mp, j+1));
1320	+	copycolor(mp->cbin[j], rgbv);
1321	+	if (oent->key == NULL)          /* new file entry */
1322	+	oent->key = strcpy((char *)
1323	+	malloc(strlen(oname)+1), oname);
1324	+	if (oent->data == NULL)
1325	+	oent->data = (char *)malloc(sizeof(STREAMOUT));
1326	+	*(STREAMOUT *)oent->data = sout;
1327	+	}
1328	+	}
1329	+	lu_doall(&ofiletab, myclose, NULL);     /* close all files */
1330	+	}
1331	+
1332	+	/* seek on the given output file */
1333	+	static int
1334	+	myseeko(const LUENT *e, void *p)
1335	+	{
1336	+	STREAMOUT       *sop = (STREAMOUT *)e->data;
1337	+	off_t           nbytes = *(off_t *)p;
1338	+
1339	+	if (sop->reclen > 1)
1340	+	nbytes = nbytes * sop->reclen;
1341	+	if (fseeko(sop->ofp, nbytes, SEEK_CUR) < 0) {
1342	+	sprintf(errmsg, "seek error on file '%s'", e->key);
1343	+	error(SYSTEM, errmsg);
1344	+	}
1345	+	return 0;
1346	+	}
1347	+
1348	+	/* recover output if possible */
1349	+	void
1350	+	recover_output(FILE *fin)
1351	+	{
1352	+	off_t           lastout = -1;
1353	+	int             outvsiz, recsiz;
1354	+	char            *outvfmt;
1355	+	int             i, j;
1356	+	MODCONT         *mp;
1357	+	int             ofl;
1358	+	char            oname[1024];
1359	+	LUENT           *ment, *oent;
1360	+	STREAMOUT       sout;
1361	+	off_t           nvals;
1362	+	int             xr, yr;
1363	+
1364	+	switch (outfmt) {
1365	+	case 'a':
1366	+	error(USER, "cannot recover ASCII output");
1367	+	return;
1368	+	case 'f':
1369	+	outvsiz = sizeof(float)*3;
1370	+	outvfmt = "float";
1371	+	break;
1372	+	case 'd':
1373	+	outvsiz = sizeof(double)*3;
1374	+	outvfmt = "double";
1375	+	break;
1376	+	case 'c':
1377	+	outvsiz = sizeof(COLR);
1378	+	outvfmt = COLRFMT;
1379	+	break;
1380	+	default:
1381	+	error(INTERNAL, "botched output format");
1382	+	return;
1383	+	}
1384	+	/* check modifier outputs */
1385	+	for (i = 0; i < nmods; i++) {
1386	+	ment = lu_find(&modconttab,modname[i]);
1387	+	mp = (MODCONT *)ment->data;
1388	+	if (mp->outspec == NULL)
1389	+	error(USER, "cannot recover from stdout");
1390	+	if (mp->outspec[0] == '!')
1391	+	error(USER, "cannot recover from command");
1392	+	for (j = 0; ; j++) {            /* check each bin's file */
1393	+	ofl = ofname(oname, mp->outspec, mp->modname, j);
1394	+	if (ofl < 0)
1395	+	error(USER, "bad output file specification");
1396	+	oent = lu_find(&ofiletab, oname);
1397	+	if (oent->data != NULL) {
1398	+	sout = *(STREAMOUT *)oent->data;
1399	+	} else {
1400	+	sout.reclen = 0;
1401	+	sout.outpipe = 0;
1402	+	sout.ofp = NULL;
1403	+	}
1404	+	if (sout.ofp != NULL) { /* already open? */
1405	+	if (ofl & OF_BIN)
1406	+	continue;
1407	+	break;
1408	+	}
1409	+	/* open output */
1410	+	sout.ofp = fopen(oname, "rb+");
1411	+	if (sout.ofp == NULL) {
1412	+	if (j)
1413	+	break;  /* assume end of modifier */
1414	+	sprintf(errmsg, "missing recover file '%s'",
1415	+	oname);
1416	+	error(WARNING, errmsg);
1417	+	break;
1418	+	}
1419	+	nvals = lseek(fileno(sout.ofp), 0, SEEK_END);
1420	+	if (nvals <= 0) {
1421	+	lastout = 0;    /* empty output, quit here */
1422	+	fclose(sout.ofp);
1423	+	break;
1424	+	}
1425	+	if (!sout.reclen) {
1426	+	if (!(ofl & OF_BIN)) {
1427	+	sprintf(errmsg,
1428	+	"need -bn to recover file '%s'",
1429	+	oname);
1430	+	error(USER, errmsg);
1431	+	}
1432	+	recsiz = outvsiz;
1433	+	} else
1434	+	recsiz = outvsiz * sout.reclen;
1435	+
1436	+	lseek(fileno(sout.ofp), 0, SEEK_SET);
1437	+	if (header && checkheader(sout.ofp, outvfmt, NULL) != 1) {
1438	+	sprintf(errmsg, "format mismatch for '%s'",
1439	+	oname);
1440	+	error(USER, errmsg);
1441	+	}
1442	+	sout.xr = xres; sout.yr = yres;
1443	+	if ((sout.xr > 0) & (sout.yr > 0) &&
1444	+	(!fscnresolu(&xr, &yr, sout.ofp) ||
1445	+	(xr != sout.xr) |
1446	+	(yr != sout.yr))) {
1447	+	sprintf(errmsg, "resolution mismatch for '%s'",
1448	+	oname);
1449	+	error(USER, errmsg);
1450	+	}
1451	+	nvals = (nvals - (off_t)ftell(sout.ofp)) / recsiz;
1452	+	if ((lastout < 0) | (nvals < lastout))
1453	+	lastout = nvals;
1454	+	if (oent->key == NULL)  /* new entry */
1455	+	oent->key = strcpy((char *)
1456	+	malloc(strlen(oname)+1), oname);
1457	+	if (oent->data == NULL)
1458	+	oent->data = (char *)malloc(sizeof(STREAMOUT));
1459	+	*(STREAMOUT *)oent->data = sout;
1460	+	if (!(ofl & OF_BIN))
1461	+	break;          /* no bin separation */
1462	+	}
1463	+	if (!lastout) {                 /* empty output */
1464	+	error(WARNING, "no previous data to recover");
1465	+	lu_done(&ofiletab);     /* reclose all outputs */
1466	+	return;
1467	+	}
1468	+	if (j > mp->nbins)              /* reallocate modifier bins */
1469	+	ment->data = (char *)(mp = growmodifier(mp, j));
1470	+	}
1471	+	if (lastout < 0) {
1472	+	error(WARNING, "no output files to recover");
1473	+	return;
1474	+	}
1475	+	if (raysleft && lastout >= raysleft/accumulate) {
1476	+	error(WARNING, "output appears to be complete");
1477	+	/* XXX should read & discard input? */
1478	+	quit(0);
1479	+	}
1480	+	/* seek on all files */
1481	+	nvals = lastout * outvsiz;
1482	+	lu_doall(&ofiletab, myseeko, &nvals);
1483	+	/* skip repeated input */
1484	+	for (nvals = 0; nvals < lastout; nvals++)
1485	+	if (getinp(oname, fin) < 0)
1486	+	error(USER, "unexpected EOF on input");
1487	+	lastray = lastdone = (unsigned long)lastout * accumulate;
1488	+	if (raysleft)
1489	+	raysleft -= lastray;
1490		}

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