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) || defined(hpux) |
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 */ |
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|
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; |
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/* 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) { |
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sflock(F_RDLCK); |
214 |
fscanf(syncfp, "%d %d", &hmult, &vmult); |
215 |
sflock(F_UNLCK); |
216 |
} |
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/* compute piece size */ |
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hres /= hmult; |
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vres /= vmult; |
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normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
221 |
sprintf(hrbuf, "%d", hres); |
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rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf; |
223 |
sprintf(vrbuf, "%d", vres); |
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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); |
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} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
244 |
dolock(outfd, F_RDLCK); |
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if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
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goto filerr; |
247 |
getheader(fp, NULL, NULL); /* skip header */ |
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if (!fscnresolu(&hr, &vr, fp) || /* check resolution */ |
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hr != hres*hmult || vr != vres*vmult) { |
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fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
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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 |
if (scanf("%d %d", xp, yp) == 2) /* use stdin */ |
325 |
return(1); |
326 |
fprintf(stderr, "%s: input format error\n", progname); |
327 |
exit(cleanup(1)); |
328 |
} |
329 |
|
330 |
|
331 |
int |
332 |
rvrpiece(xp, yp) /* check for recoverable pieces */ |
333 |
register int *xp, *yp; |
334 |
{ |
335 |
static char *pdone = NULL; /* which pieces are done */ |
336 |
static long readpos = -1; /* how far we've read */ |
337 |
register int i; |
338 |
/* |
339 |
* This routine is called by nextpiece() with an |
340 |
* exclusive lock on syncfp and the file pointer at the |
341 |
* appropriate position to read in the finished pieces. |
342 |
*/ |
343 |
if (rvrlim < 0) |
344 |
return(0); /* only check if asked */ |
345 |
if (pdone == NULL) /* first call */ |
346 |
pdone = calloc(hmult*vmult, sizeof(char)); |
347 |
if (readpos != -1) /* mark what's been done */ |
348 |
fseek(syncfp, readpos, 0); |
349 |
while (fscanf(syncfp, "%d %d", xp, yp) == 2) |
350 |
pdone[*xp*vmult+*yp] = 1; |
351 |
if (!feof(syncfp)) { |
352 |
fprintf(stderr, "%s: format error in sync file\n", progname); |
353 |
exit(1); |
354 |
} |
355 |
readpos = ftell(syncfp); |
356 |
i = hmult*vmult; /* find an unaccounted for piece */ |
357 |
while (i-- > rvrlim) |
358 |
if (!pdone[i]) { |
359 |
*xp = i / vmult; |
360 |
*yp = i % vmult; |
361 |
pdone[i] = 1; /* consider it done */ |
362 |
return(1); |
363 |
} |
364 |
rvrlim = -1; /* nothing left to recover */ |
365 |
free(pdone); |
366 |
pdone = NULL; |
367 |
return(0); |
368 |
} |
369 |
|
370 |
|
371 |
int |
372 |
cleanup(rstat) /* close rpict process and clean up */ |
373 |
int rstat; |
374 |
{ |
375 |
int status; |
376 |
|
377 |
bfree((char *)pbuf, hres*vres*sizeof(COLR)); |
378 |
fclose(torp); |
379 |
fclose(fromrp); |
380 |
while (wait(&status) != -1) |
381 |
if (rstat == 0) |
382 |
rstat = status>>8 & 0xff; |
383 |
return(rstat); |
384 |
} |
385 |
|
386 |
|
387 |
rpiece() /* render picture piece by piece */ |
388 |
{ |
389 |
VIEW pview; |
390 |
int xorg, yorg; |
391 |
/* compute view parameters */ |
392 |
copystruct(&pview, &ourview); |
393 |
switch (ourview.type) { |
394 |
case VT_PER: |
395 |
pview.horiz = 2.*180./PI*atan( |
396 |
tan(PI/180./2.*ourview.horiz)/hmult ); |
397 |
pview.vert = 2.*180./PI*atan( |
398 |
tan(PI/180./2.*ourview.vert)/vmult ); |
399 |
break; |
400 |
case VT_PAR: |
401 |
case VT_ANG: |
402 |
pview.horiz = ourview.horiz / hmult; |
403 |
pview.vert = ourview.vert / vmult; |
404 |
break; |
405 |
case VT_HEM: |
406 |
pview.horiz = 2.*180./PI*asin( |
407 |
sin(PI/180./2.*ourview.horiz)/hmult ); |
408 |
pview.vert = 2.*180./PI*asin( |
409 |
sin(PI/180./2.*ourview.vert)/vmult ); |
410 |
break; |
411 |
default: |
412 |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
413 |
progname, ourview.type); |
414 |
exit(cleanup(1)); |
415 |
} |
416 |
/* render each piece */ |
417 |
while (nextpiece(&xorg, &yorg)) { |
418 |
pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1); |
419 |
pview.voff = ourview.voff + yorg - 0.5*(vmult-1); |
420 |
fputs(VIEWSTR, torp); |
421 |
fprintview(&pview, torp); |
422 |
putc('\n', torp); |
423 |
fflush(torp); /* assigns piece to rpict */ |
424 |
putpiece(xorg, yorg); /* place piece in output */ |
425 |
} |
426 |
} |
427 |
|
428 |
|
429 |
int |
430 |
putpiece(xpos, ypos) /* get next piece from rpict */ |
431 |
int xpos, ypos; |
432 |
{ |
433 |
struct flock fls; |
434 |
int pid, status; |
435 |
int hr, vr; |
436 |
register int y; |
437 |
/* check bounds */ |
438 |
if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) { |
439 |
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
440 |
progname, xpos, ypos); |
441 |
exit(cleanup(1)); |
442 |
} |
443 |
/* check header from rpict */ |
444 |
guard_io(); |
445 |
getheader(fromrp, NULL, NULL); |
446 |
if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) { |
447 |
fprintf(stderr, "%s: resolution mismatch from %s\n", |
448 |
progname, rpargv[0]); |
449 |
exit(cleanup(1)); |
450 |
} |
451 |
if (verbose) { /* notify caller */ |
452 |
printf("%d %d begun\n", xpos, ypos); |
453 |
fflush(stdout); |
454 |
} |
455 |
unguard(); |
456 |
/* load new piece into buffer */ |
457 |
for (y = 0; y < vr; y++) { |
458 |
guard_io(); |
459 |
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
460 |
fprintf(stderr, "%s: read error from %s\n", |
461 |
progname, rpargv[0]); |
462 |
exit(cleanup(1)); |
463 |
} |
464 |
unguard(); |
465 |
} |
466 |
#if MAXFORK |
467 |
/* fork so we don't slow rpict down */ |
468 |
if ((pid = fork()) > 0) { |
469 |
if (++nforked >= MAXFORK) { |
470 |
wait(&status); /* reap a child */ |
471 |
if (status) |
472 |
exit(cleanup(status>>8 & 0xff)); |
473 |
nforked--; |
474 |
} |
475 |
return(pid); |
476 |
} |
477 |
#else |
478 |
pid = -1; /* no forking */ |
479 |
#endif |
480 |
fls.l_start = scanorig + |
481 |
((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR); |
482 |
#if NFS |
483 |
fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR); |
484 |
/* lock file section so NFS doesn't mess up */ |
485 |
fls.l_whence = 0; |
486 |
fls.l_type = F_WRLCK; |
487 |
fcntl(outfd, F_SETLKW, &fls); |
488 |
#endif |
489 |
/* write new piece to file */ |
490 |
if (lseek(outfd, fls.l_start, 0) == -1) |
491 |
goto seekerr; |
492 |
if (hmult == 1) { |
493 |
if (writebuf(outfd, (char *)pbuf, |
494 |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
495 |
goto writerr; |
496 |
} else |
497 |
for (y = 0; y < vr; y++) { |
498 |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
499 |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
500 |
goto writerr; |
501 |
if (y < vr-1 && lseek(outfd, |
502 |
(long)(hmult-1)*hr*sizeof(COLR), |
503 |
1) == -1) |
504 |
goto seekerr; |
505 |
} |
506 |
#if NFS |
507 |
fls.l_type = F_UNLCK; /* release lock */ |
508 |
fcntl(outfd, F_SETLKW, &fls); |
509 |
#endif |
510 |
if (syncfp != NULL) { /* record what's been done */ |
511 |
sflock(F_WRLCK); |
512 |
fseek(syncfp, 0L, 2); /* append index */ |
513 |
fprintf(syncfp, "%4d %4d\n", xpos, ypos); |
514 |
fflush(syncfp); |
515 |
/*** Unlock not necessary, since |
516 |
sflock(F_UNLCK); _exit() or nextpiece() is next ***/ |
517 |
} |
518 |
if (verbose) { /* notify caller */ |
519 |
printf("%d %d done\n", xpos, ypos); |
520 |
fflush(stdout); |
521 |
} |
522 |
if (pid == -1) /* didn't fork or fork failed */ |
523 |
return(0); |
524 |
_exit(0); /* else exit child process (releasing locks) */ |
525 |
seekerr: |
526 |
fprintf(stderr, "%s: seek error on file \"%s\"\n", progname, outfile); |
527 |
_exit(1); |
528 |
writerr: |
529 |
fprintf(stderr, "%s: write error on file \"%s\"\n", progname, outfile); |
530 |
_exit(1); |
531 |
} |
532 |
|
533 |
#endif |