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root/radiance/ray/src/util/rpiece.c
Revision: 2.34
Committed: Wed May 28 17:22:52 1997 UTC (26 years, 10 months ago) by gregl
Content type: text/plain
Branch: MAIN
Changes since 2.33: +5 -3 lines
Log Message:
fix for Alpha Linux

File Contents

# User Rev Content
1 greg 2.31 /* Copyright (c) 1995 Regents of the University of California */
2 greg 2.1
3     #ifndef lint
4     static char SCCSid[] = "$SunId$ LBL";
5     #endif
6    
7     /*
8     * Generate sections of a picture.
9     */
10    
11     #include "standard.h"
12 greg 2.16
13     #ifndef F_SETLKW
14    
15     main(argc, argv)
16     int argc;
17     char *argv[];
18     {
19     fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
20     exit(1);
21     }
22    
23     #else
24    
25 greg 2.6 #include <signal.h>
26 greg 2.1 #include "color.h"
27     #include "view.h"
28     #include "resolu.h"
29    
30 greg 2.12 #ifndef NFS
31     #define NFS 1
32     #endif
33 greg 2.9 /* set the following to 0 to forgo forking */
34     #ifndef MAXFORK
35 greg 2.12 #if NFS
36 greg 2.10 #define MAXFORK 3 /* allotment of duped processes */
37 greg 2.12 #else
38     #define MAXFORK 0
39 greg 2.9 #endif
40 greg 2.12 #endif
41 greg 2.18 /* protection from SYSV signals(!) */
42 greg 2.27 #if defined(sgi)
43 greg 2.18 #define guard_io() sighold(SIGALRM)
44     #define unguard() sigrelse(SIGALRM)
45     #endif
46     #ifndef guard_io
47     #define guard_io() 0
48     #define unguard() 0
49     #endif
50 gregl 2.34
51     #ifndef linux
52     extern char *sys_errlist[];
53     #endif
54    
55 greg 2.1 /* rpict command */
56 greg 2.23 char *rpargv[128] = {"rpict", "-S", "1"};
57     int rpargc = 3;
58 greg 2.1 int rpd[3];
59     FILE *torp, *fromrp;
60 greg 2.8 COLR *pbuf;
61 greg 2.1 /* our view parameters */
62     VIEW ourview = STDVIEW;
63 greg 2.4 double pixaspect = 1.0;
64 greg 2.23 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
65 greg 2.1 /* output file */
66     char *outfile = NULL;
67     int outfd;
68     long scanorig;
69 greg 2.25 FILE *syncfp = NULL; /* synchronization file pointer */
70     int synclst = F_UNLCK; /* synchronization file lock status */
71 greg 2.9 int nforked = 0;
72 greg 2.1
73 greg 2.25 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
74    
75 greg 2.1 char *progname;
76     int verbose = 0;
77 greg 2.31 unsigned timelim = 0;
78 greg 2.25 int rvrlim = -1;
79 greg 2.1
80     extern long lseek(), ftell();
81    
82 greg 2.6 int gotalrm = 0;
83     int onalrm() { gotalrm++; }
84 greg 2.1
85 greg 2.6
86 greg 2.1 main(argc, argv)
87     int argc;
88     char *argv[];
89     {
90     register int i, rval;
91    
92     progname = argv[0];
93     for (i = 1; i < argc; i++) {
94 greg 2.22 /* expand arguments */
95     while (rval = expandarg(&argc, &argv, i))
96     if (rval < 0) {
97     fprintf(stderr, "%s: cannot expand '%s'",
98     argv[0], argv[i]);
99     exit(1);
100     }
101 greg 2.1 if (argv[i][0] == '-')
102     switch (argv[i][1]) {
103     case 'v':
104     switch (argv[i][2]) {
105     case '\0': /* verbose option */
106     verbose = !verbose;
107     continue;
108     case 'f': /* view file */
109     if (viewfile(argv[++i], &ourview, NULL) <= 0) {
110     fprintf(stderr,
111     "%s: not a view file\n", argv[i]);
112     exit(1);
113     }
114     continue;
115     default: /* view option? */
116     rval = getviewopt(&ourview, argc-i, argv+i);
117     if (rval >= 0) {
118     i += rval;
119     continue;
120     }
121     break;
122     }
123     break;
124     case 'p': /* pixel aspect ratio? */
125 greg 2.23 if (argv[i][2] != 'a' || argv[i][3])
126     break;
127     pixaspect = atof(argv[i+1]);
128     continue;
129 greg 2.31 case 'T': /* time limit (hours) */
130     if (argv[i][2])
131     break;
132     timelim = atof(argv[++i])*3600. + .5;
133     break;
134 greg 2.23 case 'x': /* overall x resolution */
135     if (argv[i][2])
136     break;
137     hres = atoi(argv[++i]);
138     continue;
139     case 'y': /* overall y resolution */
140     if (argv[i][2])
141     break;
142     vres = atoi(argv[++i]);
143     continue;
144 greg 2.1 case 'X': /* horizontal multiplier */
145     if (argv[i][2])
146     break;
147     hmult = atoi(argv[++i]);
148     continue;
149     case 'Y': /* vertical multiplier */
150     if (argv[i][2])
151     break;
152     vmult = atoi(argv[++i]);
153     continue;
154 greg 2.25 case 'R': /* recover */
155     if (argv[i][2])
156     break;
157     rvrlim = 0;
158     /* fall through */
159 greg 2.5 case 'F': /* syncronization file */
160     if (argv[i][2])
161     break;
162 greg 2.28 if ((syncfp =
163     fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
164 greg 2.5 fprintf(stderr, "%s: cannot open\n",
165     argv[i]);
166     exit(1);
167     }
168     continue;
169 greg 2.15 case 'z': /* z-file ist verbotten */
170     fprintf(stderr, "%s: -z option not allowed\n",
171     argv[0]);
172     exit(1);
173 greg 2.1 case 'o': /* output file */
174     if (argv[i][2])
175     break;
176     outfile = argv[++i];
177     continue;
178 greg 2.23 } else if (i >= argc-1)
179     break;
180 greg 2.1 rpargv[rpargc++] = argv[i];
181     }
182 greg 2.23 if (i >= argc) {
183     fprintf(stderr, "%s: missing octree argument\n", argv[0]);
184     exit(1);
185     }
186 greg 2.1 if (outfile == NULL) {
187     fprintf(stderr, "%s: missing output file\n", argv[0]);
188     exit(1);
189     }
190     init(argc, argv);
191     rpiece();
192 greg 2.15 exit(cleanup(0));
193 greg 2.1 }
194    
195    
196 greg 2.25 dolock(fd, ltyp) /* lock or unlock a file */
197     int fd;
198     int ltyp;
199     {
200     static struct flock fls; /* static so initialized to zeroes */
201    
202     fls.l_type = ltyp;
203     if (fcntl(fd, F_SETLKW, &fls) < 0) {
204 greg 2.28 fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
205     progname, sys_errlist[errno]);
206 greg 2.25 exit(1);
207     }
208     }
209    
210    
211 greg 2.1 init(ac, av) /* set up output file and start rpict */
212     int ac;
213     char **av;
214     {
215 greg 2.23 static char hrbuf[16], vrbuf[16];
216 greg 2.2 extern char VersionID[];
217 greg 2.1 char *err;
218     FILE *fp;
219     int hr, vr;
220     /* set up view */
221     if ((err = setview(&ourview)) != NULL) {
222     fprintf(stderr, "%s: %s\n", progname, err);
223     exit(1);
224     }
225 greg 2.25 if (syncfp != NULL) {
226     sflock(F_RDLCK);
227     fscanf(syncfp, "%d %d", &hmult, &vmult);
228     sflock(F_UNLCK);
229 greg 2.5 }
230 greg 2.23 /* compute piece size */
231     hres /= hmult;
232     vres /= vmult;
233 greg 2.1 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
234 greg 2.23 sprintf(hrbuf, "%d", hres);
235     rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
236     sprintf(vrbuf, "%d", vres);
237     rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
238     rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
239     rpargv[rpargc++] = av[ac-1];
240     rpargv[rpargc] = NULL;
241 greg 2.1 /* open output file */
242     if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
243 greg 2.25 dolock(outfd, F_WRLCK);
244 greg 2.1 if ((fp = fdopen(dup(outfd), "w")) == NULL)
245     goto filerr;
246 greg 2.29 newheader("RADIANCE", fp); /* create header */
247     printargs(ac, av, fp);
248 greg 2.2 fprintf(fp, "SOFTWARE= %s\n", VersionID);
249 greg 2.1 fputs(VIEWSTR, fp);
250     fprintview(&ourview, fp);
251     putc('\n', fp);
252     if (pixaspect < .99 || pixaspect > 1.01)
253     fputaspect(pixaspect, fp);
254     fputformat(COLRFMT, fp);
255     putc('\n', fp);
256     fprtresolu(hres*hmult, vres*vmult, fp);
257     } else if ((outfd = open(outfile, O_RDWR)) >= 0) {
258 greg 2.25 dolock(outfd, F_RDLCK);
259 greg 2.1 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
260     goto filerr;
261 greg 2.13 getheader(fp, NULL, NULL); /* skip header */
262 greg 2.15 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
263 greg 2.1 hr != hres*hmult || vr != vres*vmult) {
264 greg 2.8 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
265     progname, outfile);
266 greg 2.1 exit(1);
267     }
268     } else {
269 greg 2.8 fprintf(stderr, "%s: cannot open file \"%s\"\n",
270     progname, outfile);
271 greg 2.1 exit(1);
272     }
273     scanorig = ftell(fp); /* record position of first scanline */
274     if (fclose(fp) == -1) /* done with stream i/o */
275     goto filerr;
276 greg 2.25 dolock(outfd, F_UNLCK);
277 greg 2.1 /* start rpict process */
278     if (open_process(rpd, rpargv) <= 0) {
279 greg 2.3 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
280 greg 2.1 exit(1);
281     }
282     if ((fromrp = fdopen(rpd[0], "r")) == NULL ||
283     (torp = fdopen(rpd[1], "w")) == NULL) {
284     fprintf(stderr, "%s: cannot open stream to %s\n",
285     progname, rpargv[0]);
286     exit(1);
287     }
288 greg 2.23 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
289 greg 2.1 fprintf(stderr, "%s: out of memory\n", progname);
290     exit(1);
291     }
292 greg 2.6 signal(SIGALRM, onalrm);
293 greg 2.31 if (timelim)
294     alarm(timelim);
295 greg 2.1 return;
296     filerr:
297 greg 2.8 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
298 greg 2.1 exit(1);
299     }
300    
301    
302     int
303 greg 2.5 nextpiece(xp, yp) /* get next piece assignment */
304     int *xp, *yp;
305     {
306 greg 2.6 if (gotalrm) /* someone wants us to quit */
307     return(0);
308 greg 2.25 if (syncfp != NULL) { /* use sync file */
309     /*
310     * So we don't necessarily have to lock and unlock the file
311     * multiple times (very slow), we establish an exclusive
312     * lock at the beginning on our synchronization file and
313     * maintain it in the subroutine rvrpiece().
314     */
315     sflock(F_WRLCK);
316     fseek(syncfp, 0L, 0); /* read position */
317     if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) {
318 greg 2.8 *xp = hmult-1;
319     *yp = vmult;
320     }
321 greg 2.25 if (rvrlim == 0) /* initialize recovery limit */
322     rvrlim = *xp*vmult + *yp;
323     if (rvrpiece(xp, yp)) { /* do stragglers first */
324     sflock(F_UNLCK);
325     return(1);
326     }
327 greg 2.8 if (--(*yp) < 0) { /* decrement position */
328 greg 2.5 *yp = vmult-1;
329 greg 2.25 if (--(*xp) < 0) { /* all done */
330     sflock(F_UNLCK);
331 greg 2.5 return(0);
332     }
333     }
334 greg 2.25 fseek(syncfp, 0L, 0); /* write new position */
335     fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp);
336     fflush(syncfp);
337     sflock(F_UNLCK); /* release sync file */
338 greg 2.5 return(1);
339     }
340 greg 2.26 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
341 greg 2.5 }
342    
343    
344     int
345 greg 2.25 rvrpiece(xp, yp) /* check for recoverable pieces */
346     register int *xp, *yp;
347     {
348     static char *pdone = NULL; /* which pieces are done */
349     static long readpos = -1; /* how far we've read */
350     register int i;
351     /*
352     * This routine is called by nextpiece() with an
353     * exclusive lock on syncfp and the file pointer at the
354     * appropriate position to read in the finished pieces.
355     */
356     if (rvrlim < 0)
357     return(0); /* only check if asked */
358     if (pdone == NULL) /* first call */
359     pdone = calloc(hmult*vmult, sizeof(char));
360 greg 2.30 if (pdone == NULL) {
361     fprintf(stderr, "%s: out of memory\n", progname);
362     exit(1);
363     }
364 greg 2.25 if (readpos != -1) /* mark what's been done */
365     fseek(syncfp, readpos, 0);
366     while (fscanf(syncfp, "%d %d", xp, yp) == 2)
367     pdone[*xp*vmult+*yp] = 1;
368     if (!feof(syncfp)) {
369     fprintf(stderr, "%s: format error in sync file\n", progname);
370     exit(1);
371     }
372     readpos = ftell(syncfp);
373     i = hmult*vmult; /* find an unaccounted for piece */
374     while (i-- > rvrlim)
375     if (!pdone[i]) {
376     *xp = i / vmult;
377     *yp = i % vmult;
378     pdone[i] = 1; /* consider it done */
379     return(1);
380     }
381     rvrlim = -1; /* nothing left to recover */
382     free(pdone);
383     pdone = NULL;
384     return(0);
385     }
386    
387    
388     int
389 greg 2.10 cleanup(rstat) /* close rpict process and clean up */
390     int rstat;
391 greg 2.1 {
392 greg 2.10 int status;
393 greg 2.1
394 greg 2.23 bfree((char *)pbuf, hres*vres*sizeof(COLR));
395 greg 2.1 fclose(torp);
396     fclose(fromrp);
397 greg 2.10 while (wait(&status) != -1)
398 greg 2.9 if (rstat == 0)
399     rstat = status>>8 & 0xff;
400     return(rstat);
401 greg 2.1 }
402    
403    
404     rpiece() /* render picture piece by piece */
405     {
406     VIEW pview;
407     int xorg, yorg;
408 greg 2.11 /* compute view parameters */
409     copystruct(&pview, &ourview);
410     switch (ourview.type) {
411     case VT_PER:
412     pview.horiz = 2.*180./PI*atan(
413     tan(PI/180./2.*ourview.horiz)/hmult );
414     pview.vert = 2.*180./PI*atan(
415     tan(PI/180./2.*ourview.vert)/vmult );
416     break;
417     case VT_PAR:
418     case VT_ANG:
419     pview.horiz = ourview.horiz / hmult;
420     pview.vert = ourview.vert / vmult;
421     break;
422 greg 2.32 case VT_CYL:
423     pview.horiz = ourview.horiz / hmult;
424     pview.vert = 2.*180./PI*atan(
425     tan(PI/180./2.*ourview.vert)/vmult );
426     break;
427 greg 2.11 case VT_HEM:
428     pview.horiz = 2.*180./PI*asin(
429     sin(PI/180./2.*ourview.horiz)/hmult );
430     pview.vert = 2.*180./PI*asin(
431     sin(PI/180./2.*ourview.vert)/vmult );
432     break;
433     default:
434     fprintf(stderr, "%s: unknown view type '-vt%c'\n",
435     progname, ourview.type);
436     exit(cleanup(1));
437     }
438     /* render each piece */
439 greg 2.5 while (nextpiece(&xorg, &yorg)) {
440 gregl 2.33 pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1);
441     pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1);
442 greg 2.1 fputs(VIEWSTR, torp);
443     fprintview(&pview, torp);
444     putc('\n', torp);
445 greg 2.11 fflush(torp); /* assigns piece to rpict */
446 greg 2.1 putpiece(xorg, yorg); /* place piece in output */
447     }
448     }
449    
450    
451 greg 2.9 int
452 greg 2.1 putpiece(xpos, ypos) /* get next piece from rpict */
453     int xpos, ypos;
454     {
455 greg 2.7 struct flock fls;
456 greg 2.9 int pid, status;
457 greg 2.1 int hr, vr;
458 greg 2.8 register int y;
459     /* check bounds */
460 greg 2.5 if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) {
461     fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
462     progname, xpos, ypos);
463 greg 2.10 exit(cleanup(1));
464 greg 2.5 }
465 greg 2.8 /* check header from rpict */
466 greg 2.18 guard_io();
467 greg 2.13 getheader(fromrp, NULL, NULL);
468 greg 2.15 if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) {
469 greg 2.3 fprintf(stderr, "%s: resolution mismatch from %s\n",
470     progname, rpargv[0]);
471 greg 2.10 exit(cleanup(1));
472 greg 2.1 }
473 greg 2.24 if (verbose) { /* notify caller */
474     printf("%d %d begun\n", xpos, ypos);
475     fflush(stdout);
476     }
477 greg 2.18 unguard();
478 greg 2.8 /* load new piece into buffer */
479 greg 2.18 for (y = 0; y < vr; y++) {
480     guard_io();
481 greg 2.8 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
482 greg 2.3 fprintf(stderr, "%s: read error from %s\n",
483     progname, rpargv[0]);
484 greg 2.10 exit(cleanup(1));
485 greg 2.1 }
486 greg 2.18 unguard();
487     }
488 greg 2.9 #if MAXFORK
489     /* fork so we don't slow rpict down */
490     if ((pid = fork()) > 0) {
491 greg 2.10 if (++nforked >= MAXFORK) {
492 greg 2.9 wait(&status); /* reap a child */
493     if (status)
494 greg 2.10 exit(cleanup(status>>8 & 0xff));
495 greg 2.9 nforked--;
496     }
497     return(pid);
498     }
499     #else
500     pid = -1; /* no forking */
501     #endif
502 greg 2.19 fls.l_start = scanorig +
503     ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
504 greg 2.12 #if NFS
505 greg 2.19 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
506 greg 2.8 /* lock file section so NFS doesn't mess up */
507     fls.l_whence = 0;
508     fls.l_type = F_WRLCK;
509 greg 2.26 if (fcntl(outfd, F_SETLKW, &fls) < 0)
510     filerr("lock");
511 greg 2.12 #endif
512 greg 2.8 /* write new piece to file */
513 greg 2.19 if (lseek(outfd, fls.l_start, 0) == -1)
514 greg 2.26 filerr("seek");
515 greg 2.9 if (hmult == 1) {
516     if (writebuf(outfd, (char *)pbuf,
517     vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
518 greg 2.26 filerr("write");
519 greg 2.9 } else
520     for (y = 0; y < vr; y++) {
521     if (writebuf(outfd, (char *)(pbuf+y*hr),
522     hr*sizeof(COLR)) != hr*sizeof(COLR))
523 greg 2.26 filerr("write");
524 greg 2.9 if (y < vr-1 && lseek(outfd,
525     (long)(hmult-1)*hr*sizeof(COLR),
526     1) == -1)
527 greg 2.26 filerr("seek");
528 greg 2.1 }
529 greg 2.25 #if NFS
530     fls.l_type = F_UNLCK; /* release lock */
531 greg 2.26 if (fcntl(outfd, F_SETLKW, &fls) < 0)
532     filerr("lock");
533 greg 2.25 #endif
534 greg 2.32 if (verbose) { /* notify caller */
535     printf("%d %d done\n", xpos, ypos);
536     fflush(stdout);
537     }
538 greg 2.25 if (syncfp != NULL) { /* record what's been done */
539     sflock(F_WRLCK);
540     fseek(syncfp, 0L, 2); /* append index */
541     fprintf(syncfp, "%4d %4d\n", xpos, ypos);
542     fflush(syncfp);
543     /*** Unlock not necessary, since
544     sflock(F_UNLCK); _exit() or nextpiece() is next ***/
545 greg 2.20 }
546 greg 2.25 if (pid == -1) /* didn't fork or fork failed */
547 greg 2.9 return(0);
548 greg 2.25 _exit(0); /* else exit child process (releasing locks) */
549 greg 2.26 }
550    
551    
552     filerr(t) /* report file error and exit */
553     char *t;
554     {
555     fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
556     progname, t, outfile, sys_errlist[errno]);
557 greg 2.9 _exit(1);
558 greg 2.1 }
559 greg 2.16
560     #endif