1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rpiece.c,v 2.43 2004/03/26 21:36:20 schorsch Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Generate sections of a picture. |
6 |
*/ |
7 |
|
8 |
|
9 |
#include <stdio.h> |
10 |
#include <signal.h> |
11 |
#include <sys/types.h> |
12 |
#include <sys/wait.h> |
13 |
|
14 |
#include "platform.h" |
15 |
#include "standard.h" |
16 |
#include "color.h" |
17 |
#include "view.h" |
18 |
#include "rtprocess.h" |
19 |
|
20 |
#ifndef F_SETLKW |
21 |
|
22 |
int |
23 |
main( |
24 |
int argc, |
25 |
char *argv[] |
26 |
) |
27 |
{ |
28 |
fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]); |
29 |
exit(1); |
30 |
} |
31 |
|
32 |
#else |
33 |
|
34 |
#ifndef NFS |
35 |
#define NFS 1 |
36 |
#endif |
37 |
/* set the following to 0 to forgo forking */ |
38 |
#ifndef MAXFORK |
39 |
#if NFS |
40 |
#define MAXFORK 3 /* allotment of duped processes */ |
41 |
#else |
42 |
#define MAXFORK 0 |
43 |
#endif |
44 |
#endif |
45 |
/* protection from SYSV signals(!) */ |
46 |
#if defined(sgi) |
47 |
#define guard_io() sighold(SIGALRM) |
48 |
#define unguard() sigrelse(SIGALRM) |
49 |
#endif |
50 |
#ifndef guard_io |
51 |
#define guard_io() |
52 |
#define unguard() |
53 |
#endif |
54 |
|
55 |
extern char *strerror(); |
56 |
|
57 |
/* rpict command */ |
58 |
char *rpargv[128] = {"rpict", "-S", "1"}; |
59 |
int rpargc = 3; |
60 |
FILE *torp, *fromrp; |
61 |
COLR *pbuf; |
62 |
/* our view parameters */ |
63 |
VIEW ourview = STDVIEW; |
64 |
double pixaspect = 1.0; |
65 |
int hres = 1024, vres = 1024, hmult = 4, vmult = 4; |
66 |
/* output file */ |
67 |
char *outfile = NULL; |
68 |
int outfd; |
69 |
long scanorig; |
70 |
FILE *syncfp = NULL; /* synchronization file pointer */ |
71 |
int synclst = F_UNLCK; /* synchronization file lock status */ |
72 |
int nforked = 0; |
73 |
|
74 |
#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t) |
75 |
|
76 |
char *progname; |
77 |
int verbose = 0; |
78 |
unsigned timelim = 0; |
79 |
int rvrlim = -1; |
80 |
|
81 |
int gotalrm = 0; |
82 |
void onalrm(int i) { gotalrm++; } |
83 |
|
84 |
static void dolock(int fd, int ltyp); |
85 |
static void init(int ac, char **av); |
86 |
static int nextpiece(int *xp, int *yp); |
87 |
static int rvrpiece(int *xp, int *yp); |
88 |
static int cleanup(int rstat); |
89 |
static void rpiece(void); |
90 |
static int putpiece(int xpos, int ypos); |
91 |
static void filerr(char *t); |
92 |
|
93 |
|
94 |
int |
95 |
main( |
96 |
int argc, |
97 |
char *argv[] |
98 |
) |
99 |
{ |
100 |
register int i, rval; |
101 |
|
102 |
progname = argv[0]; |
103 |
for (i = 1; i < argc; i++) { |
104 |
/* expand arguments */ |
105 |
while ((rval = expandarg(&argc, &argv, i)) > 0) |
106 |
; |
107 |
if (rval < 0) { |
108 |
fprintf(stderr, "%s: cannot expand '%s'", |
109 |
argv[0], argv[i]); |
110 |
exit(1); |
111 |
} |
112 |
if (argv[i][0] == '-') |
113 |
switch (argv[i][1]) { |
114 |
case 'v': |
115 |
switch (argv[i][2]) { |
116 |
case '\0': /* verbose option */ |
117 |
verbose = !verbose; |
118 |
continue; |
119 |
case 'f': /* view file */ |
120 |
if (viewfile(argv[++i], &ourview, NULL) <= 0) { |
121 |
fprintf(stderr, |
122 |
"%s: not a view file\n", argv[i]); |
123 |
exit(1); |
124 |
} |
125 |
continue; |
126 |
default: /* view option? */ |
127 |
rval = getviewopt(&ourview, argc-i, argv+i); |
128 |
if (rval >= 0) { |
129 |
i += rval; |
130 |
continue; |
131 |
} |
132 |
break; |
133 |
} |
134 |
break; |
135 |
case 'p': /* pixel aspect ratio? */ |
136 |
if (argv[i][2] != 'a' || argv[i][3]) |
137 |
break; |
138 |
pixaspect = atof(argv[++i]); |
139 |
continue; |
140 |
case 'T': /* time limit (hours) */ |
141 |
if (argv[i][2]) |
142 |
break; |
143 |
timelim = atof(argv[++i])*3600. + .5; |
144 |
break; |
145 |
case 'x': /* overall x resolution */ |
146 |
if (argv[i][2]) |
147 |
break; |
148 |
hres = atoi(argv[++i]); |
149 |
continue; |
150 |
case 'y': /* overall y resolution */ |
151 |
if (argv[i][2]) |
152 |
break; |
153 |
vres = atoi(argv[++i]); |
154 |
continue; |
155 |
case 'X': /* horizontal multiplier */ |
156 |
if (argv[i][2]) |
157 |
break; |
158 |
hmult = atoi(argv[++i]); |
159 |
continue; |
160 |
case 'Y': /* vertical multiplier */ |
161 |
if (argv[i][2]) |
162 |
break; |
163 |
vmult = atoi(argv[++i]); |
164 |
continue; |
165 |
case 'R': /* recover */ |
166 |
if (argv[i][2]) |
167 |
break; |
168 |
rvrlim = 0; |
169 |
/* fall through */ |
170 |
case 'F': /* syncronization file */ |
171 |
if (argv[i][2]) |
172 |
break; |
173 |
if ((syncfp = |
174 |
fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) { |
175 |
fprintf(stderr, "%s: cannot open\n", |
176 |
argv[i]); |
177 |
exit(1); |
178 |
} |
179 |
continue; |
180 |
case 'z': /* z-file ist verbotten */ |
181 |
fprintf(stderr, "%s: -z option not allowed\n", |
182 |
argv[0]); |
183 |
exit(1); |
184 |
case 'o': /* output file */ |
185 |
if (argv[i][2]) |
186 |
break; |
187 |
outfile = argv[++i]; |
188 |
continue; |
189 |
} else if (i >= argc-1) |
190 |
break; |
191 |
rpargv[rpargc++] = argv[i]; |
192 |
} |
193 |
if (i >= argc) { |
194 |
fprintf(stderr, "%s: missing octree argument\n", argv[0]); |
195 |
exit(1); |
196 |
} |
197 |
if (outfile == NULL) { |
198 |
fprintf(stderr, "%s: missing output file\n", argv[0]); |
199 |
exit(1); |
200 |
} |
201 |
init(argc, argv); |
202 |
rpiece(); |
203 |
exit(cleanup(0)); |
204 |
} |
205 |
|
206 |
|
207 |
static void |
208 |
dolock( /* lock or unlock a file */ |
209 |
int fd, |
210 |
int ltyp |
211 |
) |
212 |
{ |
213 |
static struct flock fls; /* static so initialized to zeroes */ |
214 |
|
215 |
fls.l_type = ltyp; |
216 |
if (fcntl(fd, F_SETLKW, &fls) < 0) { |
217 |
fprintf(stderr, "%s: cannot lock/unlock file: %s\n", |
218 |
progname, strerror(errno)); |
219 |
exit(1); |
220 |
} |
221 |
} |
222 |
|
223 |
|
224 |
static void |
225 |
init( /* set up output file and start rpict */ |
226 |
int ac, |
227 |
char **av |
228 |
) |
229 |
{ |
230 |
static char hrbuf[16], vrbuf[16]; |
231 |
extern char VersionID[]; |
232 |
char *err; |
233 |
FILE *fp; |
234 |
int hr, vr; |
235 |
SUBPROC rpd; /* since we don't close_process(), this can be local */ |
236 |
/* set up view */ |
237 |
if ((err = setview(&ourview)) != NULL) { |
238 |
fprintf(stderr, "%s: %s\n", progname, err); |
239 |
exit(1); |
240 |
} |
241 |
if (syncfp != NULL) { |
242 |
sflock(F_RDLCK); |
243 |
fscanf(syncfp, "%d %d", &hmult, &vmult); |
244 |
sflock(F_UNLCK); |
245 |
} |
246 |
/* compute piece size */ |
247 |
hres /= hmult; |
248 |
vres /= vmult; |
249 |
normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
250 |
sprintf(hrbuf, "%d", hres); |
251 |
rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf; |
252 |
sprintf(vrbuf, "%d", vres); |
253 |
rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf; |
254 |
rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0"; |
255 |
rpargv[rpargc++] = av[ac-1]; |
256 |
rpargv[rpargc] = NULL; |
257 |
/* open output file */ |
258 |
if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) { |
259 |
dolock(outfd, F_WRLCK); |
260 |
if ((fp = fdopen(dup(outfd), "w")) == NULL) |
261 |
goto filerr; |
262 |
newheader("RADIANCE", fp); /* create header */ |
263 |
printargs(ac, av, fp); |
264 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
265 |
fputs(VIEWSTR, fp); |
266 |
fprintview(&ourview, fp); |
267 |
putc('\n', fp); |
268 |
if (pixaspect < .99 || pixaspect > 1.01) |
269 |
fputaspect(pixaspect, fp); |
270 |
fputformat(COLRFMT, fp); |
271 |
putc('\n', fp); |
272 |
fprtresolu(hres*hmult, vres*vmult, fp); |
273 |
} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
274 |
dolock(outfd, F_RDLCK); |
275 |
if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
276 |
goto filerr; |
277 |
getheader(fp, NULL, NULL); /* skip header */ |
278 |
if (!fscnresolu(&hr, &vr, fp) || /* check resolution */ |
279 |
hr != hres*hmult || vr != vres*vmult) { |
280 |
fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
281 |
progname, outfile); |
282 |
exit(1); |
283 |
} |
284 |
} else { |
285 |
fprintf(stderr, "%s: cannot open file \"%s\"\n", |
286 |
progname, outfile); |
287 |
exit(1); |
288 |
} |
289 |
scanorig = ftell(fp); /* record position of first scanline */ |
290 |
if (fclose(fp) == -1) /* done with stream i/o */ |
291 |
goto filerr; |
292 |
dolock(outfd, F_UNLCK); |
293 |
/* start rpict process */ |
294 |
if (open_process(&rpd, rpargv) <= 0) { |
295 |
fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
296 |
exit(1); |
297 |
} |
298 |
if ((fromrp = fdopen(rpd.r, "r")) == NULL || |
299 |
(torp = fdopen(rpd.w, "w")) == NULL) { |
300 |
fprintf(stderr, "%s: cannot open stream to %s\n", |
301 |
progname, rpargv[0]); |
302 |
exit(1); |
303 |
} |
304 |
if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) { |
305 |
fprintf(stderr, "%s: out of memory\n", progname); |
306 |
exit(1); |
307 |
} |
308 |
signal(SIGALRM, onalrm); |
309 |
if (timelim) |
310 |
alarm(timelim); |
311 |
return; |
312 |
filerr: |
313 |
fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
314 |
exit(1); |
315 |
} |
316 |
|
317 |
|
318 |
static int |
319 |
nextpiece( /* get next piece assignment */ |
320 |
int *xp, |
321 |
int *yp |
322 |
) |
323 |
{ |
324 |
if (gotalrm) /* someone wants us to quit */ |
325 |
return(0); |
326 |
if (syncfp != NULL) { /* use sync file */ |
327 |
/* |
328 |
* So we don't necessarily have to lock and unlock the file |
329 |
* multiple times (very slow), we establish an exclusive |
330 |
* lock at the beginning on our synchronization file and |
331 |
* maintain it in the subroutine rvrpiece(). |
332 |
*/ |
333 |
sflock(F_WRLCK); |
334 |
fseek(syncfp, 0L, 0); /* read position */ |
335 |
if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) { |
336 |
*xp = hmult-1; |
337 |
*yp = vmult; |
338 |
} |
339 |
if (rvrlim == 0) /* initialize recovery limit */ |
340 |
rvrlim = *xp*vmult + *yp; |
341 |
if (rvrpiece(xp, yp)) { /* do stragglers first */ |
342 |
sflock(F_UNLCK); |
343 |
return(1); |
344 |
} |
345 |
if (--(*yp) < 0) { /* decrement position */ |
346 |
*yp = vmult-1; |
347 |
if (--(*xp) < 0) { /* all done */ |
348 |
sflock(F_UNLCK); |
349 |
return(0); |
350 |
} |
351 |
} |
352 |
fseek(syncfp, 0L, 0); /* write new position */ |
353 |
fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp); |
354 |
fflush(syncfp); |
355 |
sflock(F_UNLCK); /* release sync file */ |
356 |
return(1); |
357 |
} |
358 |
return(scanf("%d %d", xp, yp) == 2); /* use stdin */ |
359 |
} |
360 |
|
361 |
|
362 |
static int |
363 |
rvrpiece( /* check for recoverable pieces */ |
364 |
register int *xp, |
365 |
register int *yp |
366 |
) |
367 |
{ |
368 |
static char *pdone = NULL; /* which pieces are done */ |
369 |
static long readpos = -1; /* how far we've read */ |
370 |
register int i; |
371 |
/* |
372 |
* This routine is called by nextpiece() with an |
373 |
* exclusive lock on syncfp and the file pointer at the |
374 |
* appropriate position to read in the finished pieces. |
375 |
*/ |
376 |
if (rvrlim < 0) |
377 |
return(0); /* only check if asked */ |
378 |
if (pdone == NULL) /* first call */ |
379 |
pdone = calloc(hmult*vmult, sizeof(char)); |
380 |
if (pdone == NULL) { |
381 |
fprintf(stderr, "%s: out of memory\n", progname); |
382 |
exit(1); |
383 |
} |
384 |
if (readpos != -1) /* mark what's been done */ |
385 |
fseek(syncfp, readpos, 0); |
386 |
while (fscanf(syncfp, "%d %d", xp, yp) == 2) |
387 |
pdone[*xp*vmult+*yp] = 1; |
388 |
if (!feof(syncfp)) { |
389 |
fprintf(stderr, "%s: format error in sync file\n", progname); |
390 |
exit(1); |
391 |
} |
392 |
readpos = ftell(syncfp); |
393 |
i = hmult*vmult; /* find an unaccounted for piece */ |
394 |
while (i-- > rvrlim) |
395 |
if (!pdone[i]) { |
396 |
*xp = i / vmult; |
397 |
*yp = i % vmult; |
398 |
pdone[i] = 1; /* consider it done */ |
399 |
return(1); |
400 |
} |
401 |
rvrlim = -1; /* nothing left to recover */ |
402 |
free(pdone); |
403 |
pdone = NULL; |
404 |
return(0); |
405 |
} |
406 |
|
407 |
|
408 |
static int |
409 |
cleanup( /* close rpict process and clean up */ |
410 |
int rstat |
411 |
) |
412 |
{ |
413 |
int status; |
414 |
|
415 |
bfree((char *)pbuf, hres*vres*sizeof(COLR)); |
416 |
fclose(torp); |
417 |
fclose(fromrp); |
418 |
while (wait(&status) != -1) |
419 |
if (rstat == 0) |
420 |
rstat = status>>8 & 0xff; |
421 |
return(rstat); |
422 |
} |
423 |
|
424 |
|
425 |
static void |
426 |
rpiece(void) /* render picture piece by piece */ |
427 |
{ |
428 |
VIEW pview; |
429 |
int xorg, yorg; |
430 |
/* compute view parameters */ |
431 |
pview = ourview; |
432 |
switch (ourview.type) { |
433 |
case VT_PER: |
434 |
pview.horiz = 2.*180./PI*atan( |
435 |
tan(PI/180./2.*ourview.horiz)/hmult ); |
436 |
pview.vert = 2.*180./PI*atan( |
437 |
tan(PI/180./2.*ourview.vert)/vmult ); |
438 |
break; |
439 |
case VT_PAR: |
440 |
case VT_ANG: |
441 |
pview.horiz = ourview.horiz / hmult; |
442 |
pview.vert = ourview.vert / vmult; |
443 |
break; |
444 |
case VT_CYL: |
445 |
pview.horiz = ourview.horiz / hmult; |
446 |
pview.vert = 2.*180./PI*atan( |
447 |
tan(PI/180./2.*ourview.vert)/vmult ); |
448 |
break; |
449 |
case VT_HEM: |
450 |
pview.horiz = 2.*180./PI*asin( |
451 |
sin(PI/180./2.*ourview.horiz)/hmult ); |
452 |
pview.vert = 2.*180./PI*asin( |
453 |
sin(PI/180./2.*ourview.vert)/vmult ); |
454 |
break; |
455 |
default: |
456 |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
457 |
progname, ourview.type); |
458 |
exit(cleanup(1)); |
459 |
} |
460 |
/* render each piece */ |
461 |
while (nextpiece(&xorg, &yorg)) { |
462 |
pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1); |
463 |
pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1); |
464 |
fputs(VIEWSTR, torp); |
465 |
fprintview(&pview, torp); |
466 |
putc('\n', torp); |
467 |
fflush(torp); /* assigns piece to rpict */ |
468 |
putpiece(xorg, yorg); /* place piece in output */ |
469 |
} |
470 |
} |
471 |
|
472 |
|
473 |
static int |
474 |
putpiece( /* get next piece from rpict */ |
475 |
int xpos, |
476 |
int ypos |
477 |
) |
478 |
{ |
479 |
struct flock fls; |
480 |
int pid, status; |
481 |
int hr, vr; |
482 |
register int y; |
483 |
/* check bounds */ |
484 |
if ((xpos < 0) | (ypos < 0) | (xpos >= hmult) | (ypos >= vmult)) { |
485 |
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
486 |
progname, xpos, ypos); |
487 |
exit(cleanup(1)); |
488 |
} |
489 |
/* check header from rpict */ |
490 |
guard_io(); |
491 |
getheader(fromrp, NULL, NULL); |
492 |
if (!fscnresolu(&hr, &vr, fromrp) || (hr != hres) | (vr != vres)) { |
493 |
fprintf(stderr, "%s: resolution mismatch from %s\n", |
494 |
progname, rpargv[0]); |
495 |
exit(cleanup(1)); |
496 |
} |
497 |
if (verbose) { /* notify caller */ |
498 |
printf("%d %d begun\n", xpos, ypos); |
499 |
fflush(stdout); |
500 |
} |
501 |
unguard(); |
502 |
/* load new piece into buffer */ |
503 |
for (y = 0; y < vr; y++) { |
504 |
guard_io(); |
505 |
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
506 |
fprintf(stderr, "%s: read error from %s\n", |
507 |
progname, rpargv[0]); |
508 |
exit(cleanup(1)); |
509 |
} |
510 |
unguard(); |
511 |
} |
512 |
#if MAXFORK |
513 |
/* fork so we don't slow rpict down */ |
514 |
if ((pid = fork()) > 0) { |
515 |
if (++nforked >= MAXFORK) { |
516 |
wait(&status); /* reap a child */ |
517 |
if (status) |
518 |
exit(cleanup(status>>8 & 0xff)); |
519 |
nforked--; |
520 |
} |
521 |
return(pid); |
522 |
} |
523 |
#else |
524 |
pid = -1; /* no forking */ |
525 |
#endif |
526 |
fls.l_start = scanorig + |
527 |
((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR); |
528 |
#if NFS |
529 |
fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR); |
530 |
/* lock file section so NFS doesn't mess up */ |
531 |
fls.l_whence = 0; |
532 |
fls.l_type = F_WRLCK; |
533 |
if (fcntl(outfd, F_SETLKW, &fls) < 0) |
534 |
filerr("lock"); |
535 |
#endif |
536 |
/* write new piece to file */ |
537 |
if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0) |
538 |
filerr("seek"); |
539 |
if (hmult == 1) { |
540 |
if (writebuf(outfd, (char *)pbuf, |
541 |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
542 |
filerr("write"); |
543 |
} else |
544 |
for (y = 0; y < vr; y++) { |
545 |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
546 |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
547 |
filerr("write"); |
548 |
if (y < vr-1 && lseek(outfd, |
549 |
(off_t)(hmult-1)*hr*sizeof(COLR), |
550 |
SEEK_CUR) < 0) |
551 |
filerr("seek"); |
552 |
} |
553 |
#if NFS |
554 |
fls.l_type = F_UNLCK; /* release lock */ |
555 |
if (fcntl(outfd, F_SETLKW, &fls) < 0) |
556 |
filerr("lock"); |
557 |
#endif |
558 |
if (verbose) { /* notify caller */ |
559 |
printf("%d %d done\n", xpos, ypos); |
560 |
fflush(stdout); |
561 |
} |
562 |
if (syncfp != NULL) { /* record what's been done */ |
563 |
sflock(F_WRLCK); |
564 |
fseek(syncfp, 0L, 2); /* append index */ |
565 |
fprintf(syncfp, "%4d %4d\n", xpos, ypos); |
566 |
fflush(syncfp); |
567 |
/*** Unlock not necessary, since |
568 |
sflock(F_UNLCK); _exit() or nextpiece() is next ***/ |
569 |
} |
570 |
if (pid == -1) /* didn't fork or fork failed */ |
571 |
return(0); |
572 |
_exit(0); /* else exit child process (releasing locks) */ |
573 |
} |
574 |
|
575 |
|
576 |
static void |
577 |
filerr( /* report file error and exit */ |
578 |
char *t |
579 |
) |
580 |
{ |
581 |
fprintf(stderr, "%s: %s error on file \"%s\": %s\n", |
582 |
progname, t, outfile, strerror(errno)); |
583 |
_exit(1); |
584 |
} |
585 |
|
586 |
#endif |