1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rpiece.c,v 2.42 2003/10/20 16:01:55 greg 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 "rtio.h" |
16 |
#include "rtmisc.h" |
17 |
#include "color.h" |
18 |
#include "view.h" |
19 |
#include "rtprocess.h" |
20 |
|
21 |
#ifndef F_SETLKW |
22 |
|
23 |
int |
24 |
main( |
25 |
int argc, |
26 |
char *argv[] |
27 |
) |
28 |
{ |
29 |
fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]); |
30 |
exit(1); |
31 |
} |
32 |
|
33 |
#else |
34 |
|
35 |
#ifndef NFS |
36 |
#define NFS 1 |
37 |
#endif |
38 |
/* set the following to 0 to forgo forking */ |
39 |
#ifndef MAXFORK |
40 |
#if NFS |
41 |
#define MAXFORK 3 /* allotment of duped processes */ |
42 |
#else |
43 |
#define MAXFORK 0 |
44 |
#endif |
45 |
#endif |
46 |
/* protection from SYSV signals(!) */ |
47 |
#if defined(sgi) |
48 |
#define guard_io() sighold(SIGALRM) |
49 |
#define unguard() sigrelse(SIGALRM) |
50 |
#endif |
51 |
#ifndef guard_io |
52 |
#define guard_io() |
53 |
#define unguard() |
54 |
#endif |
55 |
|
56 |
extern char *strerror(); |
57 |
|
58 |
/* rpict command */ |
59 |
char *rpargv[128] = {"rpict", "-S", "1"}; |
60 |
int rpargc = 3; |
61 |
FILE *torp, *fromrp; |
62 |
COLR *pbuf; |
63 |
/* our view parameters */ |
64 |
VIEW ourview = STDVIEW; |
65 |
double pixaspect = 1.0; |
66 |
int hres = 1024, vres = 1024, hmult = 4, vmult = 4; |
67 |
/* output file */ |
68 |
char *outfile = NULL; |
69 |
int outfd; |
70 |
long scanorig; |
71 |
FILE *syncfp = NULL; /* synchronization file pointer */ |
72 |
int synclst = F_UNLCK; /* synchronization file lock status */ |
73 |
int nforked = 0; |
74 |
|
75 |
#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t) |
76 |
|
77 |
char *progname; |
78 |
int verbose = 0; |
79 |
unsigned timelim = 0; |
80 |
int rvrlim = -1; |
81 |
|
82 |
int gotalrm = 0; |
83 |
void onalrm(int i) { gotalrm++; } |
84 |
|
85 |
static void dolock(int fd, int ltyp); |
86 |
static void init(int ac, char **av); |
87 |
static int nextpiece(int *xp, int *yp); |
88 |
static int rvrpiece(int *xp, int *yp); |
89 |
static int cleanup(int rstat); |
90 |
static void rpiece(void); |
91 |
static int putpiece(int xpos, int ypos); |
92 |
static void filerr(char *t); |
93 |
|
94 |
|
95 |
int |
96 |
main( |
97 |
int argc, |
98 |
char *argv[] |
99 |
) |
100 |
{ |
101 |
register int i, rval; |
102 |
|
103 |
progname = argv[0]; |
104 |
for (i = 1; i < argc; i++) { |
105 |
/* expand arguments */ |
106 |
while ((rval = expandarg(&argc, &argv, i)) > 0) |
107 |
; |
108 |
if (rval < 0) { |
109 |
fprintf(stderr, "%s: cannot expand '%s'", |
110 |
argv[0], argv[i]); |
111 |
exit(1); |
112 |
} |
113 |
if (argv[i][0] == '-') |
114 |
switch (argv[i][1]) { |
115 |
case 'v': |
116 |
switch (argv[i][2]) { |
117 |
case '\0': /* verbose option */ |
118 |
verbose = !verbose; |
119 |
continue; |
120 |
case 'f': /* view file */ |
121 |
if (viewfile(argv[++i], &ourview, NULL) <= 0) { |
122 |
fprintf(stderr, |
123 |
"%s: not a view file\n", argv[i]); |
124 |
exit(1); |
125 |
} |
126 |
continue; |
127 |
default: /* view option? */ |
128 |
rval = getviewopt(&ourview, argc-i, argv+i); |
129 |
if (rval >= 0) { |
130 |
i += rval; |
131 |
continue; |
132 |
} |
133 |
break; |
134 |
} |
135 |
break; |
136 |
case 'p': /* pixel aspect ratio? */ |
137 |
if (argv[i][2] != 'a' || argv[i][3]) |
138 |
break; |
139 |
pixaspect = atof(argv[++i]); |
140 |
continue; |
141 |
case 'T': /* time limit (hours) */ |
142 |
if (argv[i][2]) |
143 |
break; |
144 |
timelim = atof(argv[++i])*3600. + .5; |
145 |
break; |
146 |
case 'x': /* overall x resolution */ |
147 |
if (argv[i][2]) |
148 |
break; |
149 |
hres = atoi(argv[++i]); |
150 |
continue; |
151 |
case 'y': /* overall y resolution */ |
152 |
if (argv[i][2]) |
153 |
break; |
154 |
vres = atoi(argv[++i]); |
155 |
continue; |
156 |
case 'X': /* horizontal multiplier */ |
157 |
if (argv[i][2]) |
158 |
break; |
159 |
hmult = atoi(argv[++i]); |
160 |
continue; |
161 |
case 'Y': /* vertical multiplier */ |
162 |
if (argv[i][2]) |
163 |
break; |
164 |
vmult = atoi(argv[++i]); |
165 |
continue; |
166 |
case 'R': /* recover */ |
167 |
if (argv[i][2]) |
168 |
break; |
169 |
rvrlim = 0; |
170 |
/* fall through */ |
171 |
case 'F': /* syncronization file */ |
172 |
if (argv[i][2]) |
173 |
break; |
174 |
if ((syncfp = |
175 |
fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) { |
176 |
fprintf(stderr, "%s: cannot open\n", |
177 |
argv[i]); |
178 |
exit(1); |
179 |
} |
180 |
continue; |
181 |
case 'z': /* z-file ist verbotten */ |
182 |
fprintf(stderr, "%s: -z option not allowed\n", |
183 |
argv[0]); |
184 |
exit(1); |
185 |
case 'o': /* output file */ |
186 |
if (argv[i][2]) |
187 |
break; |
188 |
outfile = argv[++i]; |
189 |
continue; |
190 |
} else if (i >= argc-1) |
191 |
break; |
192 |
rpargv[rpargc++] = argv[i]; |
193 |
} |
194 |
if (i >= argc) { |
195 |
fprintf(stderr, "%s: missing octree argument\n", argv[0]); |
196 |
exit(1); |
197 |
} |
198 |
if (outfile == NULL) { |
199 |
fprintf(stderr, "%s: missing output file\n", argv[0]); |
200 |
exit(1); |
201 |
} |
202 |
init(argc, argv); |
203 |
rpiece(); |
204 |
exit(cleanup(0)); |
205 |
} |
206 |
|
207 |
|
208 |
static void |
209 |
dolock( /* lock or unlock a file */ |
210 |
int fd, |
211 |
int ltyp |
212 |
) |
213 |
{ |
214 |
static struct flock fls; /* static so initialized to zeroes */ |
215 |
|
216 |
fls.l_type = ltyp; |
217 |
if (fcntl(fd, F_SETLKW, &fls) < 0) { |
218 |
fprintf(stderr, "%s: cannot lock/unlock file: %s\n", |
219 |
progname, strerror(errno)); |
220 |
exit(1); |
221 |
} |
222 |
} |
223 |
|
224 |
|
225 |
static void |
226 |
init( /* set up output file and start rpict */ |
227 |
int ac, |
228 |
char **av |
229 |
) |
230 |
{ |
231 |
static char hrbuf[16], vrbuf[16]; |
232 |
extern char VersionID[]; |
233 |
char *err; |
234 |
FILE *fp; |
235 |
int hr, vr; |
236 |
SUBPROC rpd; /* since we don't close_process(), this can be local */ |
237 |
/* set up view */ |
238 |
if ((err = setview(&ourview)) != NULL) { |
239 |
fprintf(stderr, "%s: %s\n", progname, err); |
240 |
exit(1); |
241 |
} |
242 |
if (syncfp != NULL) { |
243 |
sflock(F_RDLCK); |
244 |
fscanf(syncfp, "%d %d", &hmult, &vmult); |
245 |
sflock(F_UNLCK); |
246 |
} |
247 |
/* compute piece size */ |
248 |
hres /= hmult; |
249 |
vres /= vmult; |
250 |
normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
251 |
sprintf(hrbuf, "%d", hres); |
252 |
rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf; |
253 |
sprintf(vrbuf, "%d", vres); |
254 |
rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf; |
255 |
rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0"; |
256 |
rpargv[rpargc++] = av[ac-1]; |
257 |
rpargv[rpargc] = NULL; |
258 |
/* open output file */ |
259 |
if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) { |
260 |
dolock(outfd, F_WRLCK); |
261 |
if ((fp = fdopen(dup(outfd), "w")) == NULL) |
262 |
goto filerr; |
263 |
newheader("RADIANCE", fp); /* create header */ |
264 |
printargs(ac, av, fp); |
265 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
266 |
fputs(VIEWSTR, fp); |
267 |
fprintview(&ourview, fp); |
268 |
putc('\n', fp); |
269 |
if (pixaspect < .99 || pixaspect > 1.01) |
270 |
fputaspect(pixaspect, fp); |
271 |
fputformat(COLRFMT, fp); |
272 |
putc('\n', fp); |
273 |
fprtresolu(hres*hmult, vres*vmult, fp); |
274 |
} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
275 |
dolock(outfd, F_RDLCK); |
276 |
if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
277 |
goto filerr; |
278 |
getheader(fp, NULL, NULL); /* skip header */ |
279 |
if (!fscnresolu(&hr, &vr, fp) || /* check resolution */ |
280 |
hr != hres*hmult || vr != vres*vmult) { |
281 |
fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
282 |
progname, outfile); |
283 |
exit(1); |
284 |
} |
285 |
} else { |
286 |
fprintf(stderr, "%s: cannot open file \"%s\"\n", |
287 |
progname, outfile); |
288 |
exit(1); |
289 |
} |
290 |
scanorig = ftell(fp); /* record position of first scanline */ |
291 |
if (fclose(fp) == -1) /* done with stream i/o */ |
292 |
goto filerr; |
293 |
dolock(outfd, F_UNLCK); |
294 |
/* start rpict process */ |
295 |
if (open_process(&rpd, rpargv) <= 0) { |
296 |
fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
297 |
exit(1); |
298 |
} |
299 |
if ((fromrp = fdopen(rpd.r, "r")) == NULL || |
300 |
(torp = fdopen(rpd.w, "w")) == NULL) { |
301 |
fprintf(stderr, "%s: cannot open stream to %s\n", |
302 |
progname, rpargv[0]); |
303 |
exit(1); |
304 |
} |
305 |
if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) { |
306 |
fprintf(stderr, "%s: out of memory\n", progname); |
307 |
exit(1); |
308 |
} |
309 |
signal(SIGALRM, onalrm); |
310 |
if (timelim) |
311 |
alarm(timelim); |
312 |
return; |
313 |
filerr: |
314 |
fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
315 |
exit(1); |
316 |
} |
317 |
|
318 |
|
319 |
static int |
320 |
nextpiece( /* get next piece assignment */ |
321 |
int *xp, |
322 |
int *yp |
323 |
) |
324 |
{ |
325 |
if (gotalrm) /* someone wants us to quit */ |
326 |
return(0); |
327 |
if (syncfp != NULL) { /* use sync file */ |
328 |
/* |
329 |
* So we don't necessarily have to lock and unlock the file |
330 |
* multiple times (very slow), we establish an exclusive |
331 |
* lock at the beginning on our synchronization file and |
332 |
* maintain it in the subroutine rvrpiece(). |
333 |
*/ |
334 |
sflock(F_WRLCK); |
335 |
fseek(syncfp, 0L, 0); /* read position */ |
336 |
if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) { |
337 |
*xp = hmult-1; |
338 |
*yp = vmult; |
339 |
} |
340 |
if (rvrlim == 0) /* initialize recovery limit */ |
341 |
rvrlim = *xp*vmult + *yp; |
342 |
if (rvrpiece(xp, yp)) { /* do stragglers first */ |
343 |
sflock(F_UNLCK); |
344 |
return(1); |
345 |
} |
346 |
if (--(*yp) < 0) { /* decrement position */ |
347 |
*yp = vmult-1; |
348 |
if (--(*xp) < 0) { /* all done */ |
349 |
sflock(F_UNLCK); |
350 |
return(0); |
351 |
} |
352 |
} |
353 |
fseek(syncfp, 0L, 0); /* write new position */ |
354 |
fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp); |
355 |
fflush(syncfp); |
356 |
sflock(F_UNLCK); /* release sync file */ |
357 |
return(1); |
358 |
} |
359 |
return(scanf("%d %d", xp, yp) == 2); /* use stdin */ |
360 |
} |
361 |
|
362 |
|
363 |
static int |
364 |
rvrpiece( /* check for recoverable pieces */ |
365 |
register int *xp, |
366 |
register int *yp |
367 |
) |
368 |
{ |
369 |
static char *pdone = NULL; /* which pieces are done */ |
370 |
static long readpos = -1; /* how far we've read */ |
371 |
register int i; |
372 |
/* |
373 |
* This routine is called by nextpiece() with an |
374 |
* exclusive lock on syncfp and the file pointer at the |
375 |
* appropriate position to read in the finished pieces. |
376 |
*/ |
377 |
if (rvrlim < 0) |
378 |
return(0); /* only check if asked */ |
379 |
if (pdone == NULL) /* first call */ |
380 |
pdone = calloc(hmult*vmult, sizeof(char)); |
381 |
if (pdone == NULL) { |
382 |
fprintf(stderr, "%s: out of memory\n", progname); |
383 |
exit(1); |
384 |
} |
385 |
if (readpos != -1) /* mark what's been done */ |
386 |
fseek(syncfp, readpos, 0); |
387 |
while (fscanf(syncfp, "%d %d", xp, yp) == 2) |
388 |
pdone[*xp*vmult+*yp] = 1; |
389 |
if (!feof(syncfp)) { |
390 |
fprintf(stderr, "%s: format error in sync file\n", progname); |
391 |
exit(1); |
392 |
} |
393 |
readpos = ftell(syncfp); |
394 |
i = hmult*vmult; /* find an unaccounted for piece */ |
395 |
while (i-- > rvrlim) |
396 |
if (!pdone[i]) { |
397 |
*xp = i / vmult; |
398 |
*yp = i % vmult; |
399 |
pdone[i] = 1; /* consider it done */ |
400 |
return(1); |
401 |
} |
402 |
rvrlim = -1; /* nothing left to recover */ |
403 |
free(pdone); |
404 |
pdone = NULL; |
405 |
return(0); |
406 |
} |
407 |
|
408 |
|
409 |
static int |
410 |
cleanup( /* close rpict process and clean up */ |
411 |
int rstat |
412 |
) |
413 |
{ |
414 |
int status; |
415 |
|
416 |
bfree((char *)pbuf, hres*vres*sizeof(COLR)); |
417 |
fclose(torp); |
418 |
fclose(fromrp); |
419 |
while (wait(&status) != -1) |
420 |
if (rstat == 0) |
421 |
rstat = status>>8 & 0xff; |
422 |
return(rstat); |
423 |
} |
424 |
|
425 |
|
426 |
static void |
427 |
rpiece(void) /* render picture piece by piece */ |
428 |
{ |
429 |
VIEW pview; |
430 |
int xorg, yorg; |
431 |
/* compute view parameters */ |
432 |
pview = ourview; |
433 |
switch (ourview.type) { |
434 |
case VT_PER: |
435 |
pview.horiz = 2.*180./PI*atan( |
436 |
tan(PI/180./2.*ourview.horiz)/hmult ); |
437 |
pview.vert = 2.*180./PI*atan( |
438 |
tan(PI/180./2.*ourview.vert)/vmult ); |
439 |
break; |
440 |
case VT_PAR: |
441 |
case VT_ANG: |
442 |
pview.horiz = ourview.horiz / hmult; |
443 |
pview.vert = ourview.vert / vmult; |
444 |
break; |
445 |
case VT_CYL: |
446 |
pview.horiz = ourview.horiz / hmult; |
447 |
pview.vert = 2.*180./PI*atan( |
448 |
tan(PI/180./2.*ourview.vert)/vmult ); |
449 |
break; |
450 |
case VT_HEM: |
451 |
pview.horiz = 2.*180./PI*asin( |
452 |
sin(PI/180./2.*ourview.horiz)/hmult ); |
453 |
pview.vert = 2.*180./PI*asin( |
454 |
sin(PI/180./2.*ourview.vert)/vmult ); |
455 |
break; |
456 |
default: |
457 |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
458 |
progname, ourview.type); |
459 |
exit(cleanup(1)); |
460 |
} |
461 |
/* render each piece */ |
462 |
while (nextpiece(&xorg, &yorg)) { |
463 |
pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1); |
464 |
pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1); |
465 |
fputs(VIEWSTR, torp); |
466 |
fprintview(&pview, torp); |
467 |
putc('\n', torp); |
468 |
fflush(torp); /* assigns piece to rpict */ |
469 |
putpiece(xorg, yorg); /* place piece in output */ |
470 |
} |
471 |
} |
472 |
|
473 |
|
474 |
static int |
475 |
putpiece( /* get next piece from rpict */ |
476 |
int xpos, |
477 |
int ypos |
478 |
) |
479 |
{ |
480 |
struct flock fls; |
481 |
int pid, status; |
482 |
int hr, vr; |
483 |
register int y; |
484 |
/* check bounds */ |
485 |
if ((xpos < 0) | (ypos < 0) | (xpos >= hmult) | (ypos >= vmult)) { |
486 |
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
487 |
progname, xpos, ypos); |
488 |
exit(cleanup(1)); |
489 |
} |
490 |
/* check header from rpict */ |
491 |
guard_io(); |
492 |
getheader(fromrp, NULL, NULL); |
493 |
if (!fscnresolu(&hr, &vr, fromrp) || (hr != hres) | (vr != vres)) { |
494 |
fprintf(stderr, "%s: resolution mismatch from %s\n", |
495 |
progname, rpargv[0]); |
496 |
exit(cleanup(1)); |
497 |
} |
498 |
if (verbose) { /* notify caller */ |
499 |
printf("%d %d begun\n", xpos, ypos); |
500 |
fflush(stdout); |
501 |
} |
502 |
unguard(); |
503 |
/* load new piece into buffer */ |
504 |
for (y = 0; y < vr; y++) { |
505 |
guard_io(); |
506 |
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
507 |
fprintf(stderr, "%s: read error from %s\n", |
508 |
progname, rpargv[0]); |
509 |
exit(cleanup(1)); |
510 |
} |
511 |
unguard(); |
512 |
} |
513 |
#if MAXFORK |
514 |
/* fork so we don't slow rpict down */ |
515 |
if ((pid = fork()) > 0) { |
516 |
if (++nforked >= MAXFORK) { |
517 |
wait(&status); /* reap a child */ |
518 |
if (status) |
519 |
exit(cleanup(status>>8 & 0xff)); |
520 |
nforked--; |
521 |
} |
522 |
return(pid); |
523 |
} |
524 |
#else |
525 |
pid = -1; /* no forking */ |
526 |
#endif |
527 |
fls.l_start = scanorig + |
528 |
((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR); |
529 |
#if NFS |
530 |
fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR); |
531 |
/* lock file section so NFS doesn't mess up */ |
532 |
fls.l_whence = 0; |
533 |
fls.l_type = F_WRLCK; |
534 |
if (fcntl(outfd, F_SETLKW, &fls) < 0) |
535 |
filerr("lock"); |
536 |
#endif |
537 |
/* write new piece to file */ |
538 |
if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0) |
539 |
filerr("seek"); |
540 |
if (hmult == 1) { |
541 |
if (writebuf(outfd, (char *)pbuf, |
542 |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
543 |
filerr("write"); |
544 |
} else |
545 |
for (y = 0; y < vr; y++) { |
546 |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
547 |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
548 |
filerr("write"); |
549 |
if (y < vr-1 && lseek(outfd, |
550 |
(off_t)(hmult-1)*hr*sizeof(COLR), |
551 |
SEEK_CUR) < 0) |
552 |
filerr("seek"); |
553 |
} |
554 |
#if NFS |
555 |
fls.l_type = F_UNLCK; /* release lock */ |
556 |
if (fcntl(outfd, F_SETLKW, &fls) < 0) |
557 |
filerr("lock"); |
558 |
#endif |
559 |
if (verbose) { /* notify caller */ |
560 |
printf("%d %d done\n", xpos, ypos); |
561 |
fflush(stdout); |
562 |
} |
563 |
if (syncfp != NULL) { /* record what's been done */ |
564 |
sflock(F_WRLCK); |
565 |
fseek(syncfp, 0L, 2); /* append index */ |
566 |
fprintf(syncfp, "%4d %4d\n", xpos, ypos); |
567 |
fflush(syncfp); |
568 |
/*** Unlock not necessary, since |
569 |
sflock(F_UNLCK); _exit() or nextpiece() is next ***/ |
570 |
} |
571 |
if (pid == -1) /* didn't fork or fork failed */ |
572 |
return(0); |
573 |
_exit(0); /* else exit child process (releasing locks) */ |
574 |
} |
575 |
|
576 |
|
577 |
static void |
578 |
filerr( /* report file error and exit */ |
579 |
char *t |
580 |
) |
581 |
{ |
582 |
fprintf(stderr, "%s: %s error on file \"%s\": %s\n", |
583 |
progname, t, outfile, strerror(errno)); |
584 |
_exit(1); |
585 |
} |
586 |
|
587 |
#endif |