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root/radiance/ray/src/util/rpiece.c
Revision: 2.27
Committed: Mon Oct 18 13:17:47 1993 UTC (30 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.26: +1 -1 lines
Log Message:
removed use of hpux for sighold() and sigrelse(), linking problem

File Contents

# Content
1 /* Copyright (c) 1993 Regents of the University of California */
2
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
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 #include <signal.h>
26 #include "color.h"
27 #include "view.h"
28 #include "resolu.h"
29
30 #ifndef NFS
31 #define NFS 1
32 #endif
33 /* set the following to 0 to forgo forking */
34 #ifndef MAXFORK
35 #if NFS
36 #define MAXFORK 3 /* allotment of duped processes */
37 #else
38 #define MAXFORK 0
39 #endif
40 #endif
41 /* protection from SYSV signals(!) */
42 #if defined(sgi)
43 #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 /* rpict command */
51 char *rpargv[128] = {"rpict", "-S", "1"};
52 int rpargc = 3;
53 int rpd[3];
54 FILE *torp, *fromrp;
55 COLR *pbuf;
56 /* our view parameters */
57 VIEW ourview = STDVIEW;
58 double pixaspect = 1.0;
59 int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
60 /* output file */
61 char *outfile = NULL;
62 int outfd;
63 long scanorig;
64 FILE *syncfp = NULL; /* synchronization file pointer */
65 int synclst = F_UNLCK; /* synchronization file lock status */
66 int nforked = 0;
67
68 #define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
69
70 char *progname;
71 int verbose = 0;
72 int rvrlim = -1;
73
74 extern long lseek(), ftell();
75
76 int gotalrm = 0;
77 int onalrm() { gotalrm++; }
78
79
80 main(argc, argv)
81 int argc;
82 char *argv[];
83 {
84 register int i, rval;
85
86 progname = argv[0];
87 for (i = 1; i < argc; i++) {
88 /* expand arguments */
89 while (rval = expandarg(&argc, &argv, i))
90 if (rval < 0) {
91 fprintf(stderr, "%s: cannot expand '%s'",
92 argv[0], argv[i]);
93 exit(1);
94 }
95 if (argv[i][0] == '-')
96 switch (argv[i][1]) {
97 case 'v':
98 switch (argv[i][2]) {
99 case '\0': /* verbose option */
100 verbose = !verbose;
101 continue;
102 case 'f': /* view file */
103 if (viewfile(argv[++i], &ourview, NULL) <= 0) {
104 fprintf(stderr,
105 "%s: not a view file\n", argv[i]);
106 exit(1);
107 }
108 continue;
109 default: /* view option? */
110 rval = getviewopt(&ourview, argc-i, argv+i);
111 if (rval >= 0) {
112 i += rval;
113 continue;
114 }
115 break;
116 }
117 break;
118 case 'p': /* pixel aspect ratio? */
119 if (argv[i][2] != 'a' || argv[i][3])
120 break;
121 pixaspect = atof(argv[i+1]);
122 continue;
123 case 'x': /* overall x resolution */
124 if (argv[i][2])
125 break;
126 hres = atoi(argv[++i]);
127 continue;
128 case 'y': /* overall y resolution */
129 if (argv[i][2])
130 break;
131 vres = atoi(argv[++i]);
132 continue;
133 case 'X': /* horizontal multiplier */
134 if (argv[i][2])
135 break;
136 hmult = atoi(argv[++i]);
137 continue;
138 case 'Y': /* vertical multiplier */
139 if (argv[i][2])
140 break;
141 vmult = atoi(argv[++i]);
142 continue;
143 case 'R': /* recover */
144 if (argv[i][2])
145 break;
146 rvrlim = 0;
147 /* fall through */
148 case 'F': /* syncronization file */
149 if (argv[i][2])
150 break;
151 if ((syncfp = fopen(argv[++i],"r+")) == NULL) {
152 fprintf(stderr, "%s: cannot open\n",
153 argv[i]);
154 exit(1);
155 }
156 continue;
157 case 'z': /* z-file ist verbotten */
158 fprintf(stderr, "%s: -z option not allowed\n",
159 argv[0]);
160 exit(1);
161 case 'o': /* output file */
162 if (argv[i][2])
163 break;
164 outfile = argv[++i];
165 continue;
166 } else if (i >= argc-1)
167 break;
168 rpargv[rpargc++] = argv[i];
169 }
170 if (i >= argc) {
171 fprintf(stderr, "%s: missing octree argument\n", argv[0]);
172 exit(1);
173 }
174 if (outfile == NULL) {
175 fprintf(stderr, "%s: missing output file\n", argv[0]);
176 exit(1);
177 }
178 init(argc, argv);
179 rpiece();
180 exit(cleanup(0));
181 }
182
183
184 dolock(fd, ltyp) /* lock or unlock a file */
185 int fd;
186 int ltyp;
187 {
188 static struct flock fls; /* static so initialized to zeroes */
189
190 fls.l_type = ltyp;
191 if (fcntl(fd, F_SETLKW, &fls) < 0) {
192 fprintf(stderr, "%s: cannot lock/unlock file\n", progname);
193 exit(1);
194 }
195 }
196
197
198 init(ac, av) /* set up output file and start rpict */
199 int ac;
200 char **av;
201 {
202 static char hrbuf[16], vrbuf[16];
203 extern char VersionID[];
204 char *err;
205 FILE *fp;
206 int hr, vr;
207 /* set up view */
208 if ((err = setview(&ourview)) != NULL) {
209 fprintf(stderr, "%s: %s\n", progname, err);
210 exit(1);
211 }
212 if (syncfp != NULL) {
213 sflock(F_RDLCK);
214 fscanf(syncfp, "%d %d", &hmult, &vmult);
215 sflock(F_UNLCK);
216 }
217 /* compute piece size */
218 hres /= hmult;
219 vres /= vmult;
220 normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
221 sprintf(hrbuf, "%d", hres);
222 rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
223 sprintf(vrbuf, "%d", vres);
224 rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
225 rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
226 rpargv[rpargc++] = av[ac-1];
227 rpargv[rpargc] = NULL;
228 /* open output file */
229 if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
230 dolock(outfd, F_WRLCK);
231 if ((fp = fdopen(dup(outfd), "w")) == NULL)
232 goto filerr;
233 printargs(ac, av, fp); /* write header */
234 fprintf(fp, "SOFTWARE= %s\n", VersionID);
235 fputs(VIEWSTR, fp);
236 fprintview(&ourview, fp);
237 putc('\n', fp);
238 if (pixaspect < .99 || pixaspect > 1.01)
239 fputaspect(pixaspect, fp);
240 fputformat(COLRFMT, fp);
241 putc('\n', fp);
242 fprtresolu(hres*hmult, vres*vmult, fp);
243 } else if ((outfd = open(outfile, O_RDWR)) >= 0) {
244 dolock(outfd, F_RDLCK);
245 if ((fp = fdopen(dup(outfd), "r+")) == NULL)
246 goto filerr;
247 getheader(fp, NULL, NULL); /* skip header */
248 if (!fscnresolu(&hr, &vr, fp) || /* check resolution */
249 hr != hres*hmult || vr != vres*vmult) {
250 fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
251 progname, outfile);
252 exit(1);
253 }
254 } else {
255 fprintf(stderr, "%s: cannot open file \"%s\"\n",
256 progname, outfile);
257 exit(1);
258 }
259 scanorig = ftell(fp); /* record position of first scanline */
260 if (fclose(fp) == -1) /* done with stream i/o */
261 goto filerr;
262 dolock(outfd, F_UNLCK);
263 /* start rpict process */
264 if (open_process(rpd, rpargv) <= 0) {
265 fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
266 exit(1);
267 }
268 if ((fromrp = fdopen(rpd[0], "r")) == NULL ||
269 (torp = fdopen(rpd[1], "w")) == NULL) {
270 fprintf(stderr, "%s: cannot open stream to %s\n",
271 progname, rpargv[0]);
272 exit(1);
273 }
274 if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
275 fprintf(stderr, "%s: out of memory\n", progname);
276 exit(1);
277 }
278 signal(SIGALRM, onalrm);
279 return;
280 filerr:
281 fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
282 exit(1);
283 }
284
285
286 int
287 nextpiece(xp, yp) /* get next piece assignment */
288 int *xp, *yp;
289 {
290 if (gotalrm) /* someone wants us to quit */
291 return(0);
292 if (syncfp != NULL) { /* use sync file */
293 /*
294 * So we don't necessarily have to lock and unlock the file
295 * multiple times (very slow), we establish an exclusive
296 * lock at the beginning on our synchronization file and
297 * maintain it in the subroutine rvrpiece().
298 */
299 sflock(F_WRLCK);
300 fseek(syncfp, 0L, 0); /* read position */
301 if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) {
302 *xp = hmult-1;
303 *yp = vmult;
304 }
305 if (rvrlim == 0) /* initialize recovery limit */
306 rvrlim = *xp*vmult + *yp;
307 if (rvrpiece(xp, yp)) { /* do stragglers first */
308 sflock(F_UNLCK);
309 return(1);
310 }
311 if (--(*yp) < 0) { /* decrement position */
312 *yp = vmult-1;
313 if (--(*xp) < 0) { /* all done */
314 sflock(F_UNLCK);
315 return(0);
316 }
317 }
318 fseek(syncfp, 0L, 0); /* write new position */
319 fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp);
320 fflush(syncfp);
321 sflock(F_UNLCK); /* release sync file */
322 return(1);
323 }
324 return(scanf("%d %d", xp, yp) == 2); /* use stdin */
325 }
326
327
328 int
329 rvrpiece(xp, yp) /* check for recoverable pieces */
330 register int *xp, *yp;
331 {
332 static char *pdone = NULL; /* which pieces are done */
333 static long readpos = -1; /* how far we've read */
334 register int i;
335 /*
336 * This routine is called by nextpiece() with an
337 * exclusive lock on syncfp and the file pointer at the
338 * appropriate position to read in the finished pieces.
339 */
340 if (rvrlim < 0)
341 return(0); /* only check if asked */
342 if (pdone == NULL) /* first call */
343 pdone = calloc(hmult*vmult, sizeof(char));
344 if (readpos != -1) /* mark what's been done */
345 fseek(syncfp, readpos, 0);
346 while (fscanf(syncfp, "%d %d", xp, yp) == 2)
347 pdone[*xp*vmult+*yp] = 1;
348 if (!feof(syncfp)) {
349 fprintf(stderr, "%s: format error in sync file\n", progname);
350 exit(1);
351 }
352 readpos = ftell(syncfp);
353 i = hmult*vmult; /* find an unaccounted for piece */
354 while (i-- > rvrlim)
355 if (!pdone[i]) {
356 *xp = i / vmult;
357 *yp = i % vmult;
358 pdone[i] = 1; /* consider it done */
359 return(1);
360 }
361 rvrlim = -1; /* nothing left to recover */
362 free(pdone);
363 pdone = NULL;
364 return(0);
365 }
366
367
368 int
369 cleanup(rstat) /* close rpict process and clean up */
370 int rstat;
371 {
372 int status;
373
374 bfree((char *)pbuf, hres*vres*sizeof(COLR));
375 fclose(torp);
376 fclose(fromrp);
377 while (wait(&status) != -1)
378 if (rstat == 0)
379 rstat = status>>8 & 0xff;
380 return(rstat);
381 }
382
383
384 rpiece() /* render picture piece by piece */
385 {
386 VIEW pview;
387 int xorg, yorg;
388 /* compute view parameters */
389 copystruct(&pview, &ourview);
390 switch (ourview.type) {
391 case VT_PER:
392 pview.horiz = 2.*180./PI*atan(
393 tan(PI/180./2.*ourview.horiz)/hmult );
394 pview.vert = 2.*180./PI*atan(
395 tan(PI/180./2.*ourview.vert)/vmult );
396 break;
397 case VT_PAR:
398 case VT_ANG:
399 pview.horiz = ourview.horiz / hmult;
400 pview.vert = ourview.vert / vmult;
401 break;
402 case VT_HEM:
403 pview.horiz = 2.*180./PI*asin(
404 sin(PI/180./2.*ourview.horiz)/hmult );
405 pview.vert = 2.*180./PI*asin(
406 sin(PI/180./2.*ourview.vert)/vmult );
407 break;
408 default:
409 fprintf(stderr, "%s: unknown view type '-vt%c'\n",
410 progname, ourview.type);
411 exit(cleanup(1));
412 }
413 /* render each piece */
414 while (nextpiece(&xorg, &yorg)) {
415 pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1);
416 pview.voff = ourview.voff + yorg - 0.5*(vmult-1);
417 fputs(VIEWSTR, torp);
418 fprintview(&pview, torp);
419 putc('\n', torp);
420 fflush(torp); /* assigns piece to rpict */
421 putpiece(xorg, yorg); /* place piece in output */
422 }
423 }
424
425
426 int
427 putpiece(xpos, ypos) /* get next piece from rpict */
428 int xpos, ypos;
429 {
430 struct flock fls;
431 int pid, status;
432 int hr, vr;
433 register int y;
434 /* check bounds */
435 if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) {
436 fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
437 progname, xpos, ypos);
438 exit(cleanup(1));
439 }
440 /* check header from rpict */
441 guard_io();
442 getheader(fromrp, NULL, NULL);
443 if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) {
444 fprintf(stderr, "%s: resolution mismatch from %s\n",
445 progname, rpargv[0]);
446 exit(cleanup(1));
447 }
448 if (verbose) { /* notify caller */
449 printf("%d %d begun\n", xpos, ypos);
450 fflush(stdout);
451 }
452 unguard();
453 /* load new piece into buffer */
454 for (y = 0; y < vr; y++) {
455 guard_io();
456 if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
457 fprintf(stderr, "%s: read error from %s\n",
458 progname, rpargv[0]);
459 exit(cleanup(1));
460 }
461 unguard();
462 }
463 #if MAXFORK
464 /* fork so we don't slow rpict down */
465 if ((pid = fork()) > 0) {
466 if (++nforked >= MAXFORK) {
467 wait(&status); /* reap a child */
468 if (status)
469 exit(cleanup(status>>8 & 0xff));
470 nforked--;
471 }
472 return(pid);
473 }
474 #else
475 pid = -1; /* no forking */
476 #endif
477 fls.l_start = scanorig +
478 ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
479 #if NFS
480 fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
481 /* lock file section so NFS doesn't mess up */
482 fls.l_whence = 0;
483 fls.l_type = F_WRLCK;
484 if (fcntl(outfd, F_SETLKW, &fls) < 0)
485 filerr("lock");
486 #endif
487 /* write new piece to file */
488 if (lseek(outfd, fls.l_start, 0) == -1)
489 filerr("seek");
490 if (hmult == 1) {
491 if (writebuf(outfd, (char *)pbuf,
492 vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
493 filerr("write");
494 } else
495 for (y = 0; y < vr; y++) {
496 if (writebuf(outfd, (char *)(pbuf+y*hr),
497 hr*sizeof(COLR)) != hr*sizeof(COLR))
498 filerr("write");
499 if (y < vr-1 && lseek(outfd,
500 (long)(hmult-1)*hr*sizeof(COLR),
501 1) == -1)
502 filerr("seek");
503 }
504 #if NFS
505 fls.l_type = F_UNLCK; /* release lock */
506 if (fcntl(outfd, F_SETLKW, &fls) < 0)
507 filerr("lock");
508 #endif
509 if (syncfp != NULL) { /* record what's been done */
510 sflock(F_WRLCK);
511 fseek(syncfp, 0L, 2); /* append index */
512 fprintf(syncfp, "%4d %4d\n", xpos, ypos);
513 fflush(syncfp);
514 /*** Unlock not necessary, since
515 sflock(F_UNLCK); _exit() or nextpiece() is next ***/
516 }
517 if (verbose) { /* notify caller */
518 printf("%d %d done\n", xpos, ypos);
519 fflush(stdout);
520 }
521 if (pid == -1) /* didn't fork or fork failed */
522 return(0);
523 _exit(0); /* else exit child process (releasing locks) */
524 }
525
526
527 filerr(t) /* report file error and exit */
528 char *t;
529 {
530 extern char *sys_errlist[];
531
532 fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
533 progname, t, outfile, sys_errlist[errno]);
534 _exit(1);
535 }
536
537 #endif