10 |
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|
11 |
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#include "standard.h" |
12 |
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#include <fcntl.h> |
13 |
+ |
#include <signal.h> |
14 |
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#include "color.h" |
15 |
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#include "view.h" |
16 |
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#include "resolu.h" |
17 |
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|
18 |
+ |
/* set the following to 0 to forgo forking */ |
19 |
+ |
#ifndef MAXFORK |
20 |
+ |
#define MAXFORK 2 /* max. unreaped child processes */ |
21 |
+ |
#endif |
22 |
+ |
|
23 |
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/* rpict command */ |
24 |
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char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
25 |
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int rpargc = 9; |
26 |
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int rpd[3]; |
27 |
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FILE *torp, *fromrp; |
28 |
< |
COLR *scanline; |
28 |
> |
COLR *pbuf; |
29 |
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/* our view parameters */ |
30 |
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VIEW ourview = STDVIEW; |
31 |
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double pixaspect = 1.0; |
34 |
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char *outfile = NULL; |
35 |
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int outfd; |
36 |
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long scanorig; |
37 |
+ |
int syncfd = -1; /* lock file descriptor */ |
38 |
+ |
int nforked = 0; |
39 |
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|
40 |
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char *progname; |
41 |
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int verbose = 0; |
42 |
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|
43 |
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extern long lseek(), ftell(); |
44 |
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|
45 |
+ |
int gotalrm = 0; |
46 |
+ |
int onalrm() { gotalrm++; } |
47 |
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|
48 |
+ |
|
49 |
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main(argc, argv) |
50 |
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int argc; |
51 |
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char *argv[]; |
99 |
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break; |
100 |
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vmult = atoi(argv[++i]); |
101 |
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continue; |
102 |
+ |
case 'F': /* syncronization file */ |
103 |
+ |
if (argv[i][2]) |
104 |
+ |
break; |
105 |
+ |
if ((syncfd = open(argv[++i], O_RDWR)) < 0) { |
106 |
+ |
fprintf(stderr, "%s: cannot open\n", |
107 |
+ |
argv[i]); |
108 |
+ |
exit(1); |
109 |
+ |
} |
110 |
+ |
continue; |
111 |
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case 'o': /* output file */ |
112 |
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if (argv[i][2]) |
113 |
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break; |
141 |
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fprintf(stderr, "%s: %s\n", progname, err); |
142 |
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exit(1); |
143 |
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} |
144 |
+ |
if (syncfd != -1) { |
145 |
+ |
char buf[32]; |
146 |
+ |
buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
147 |
+ |
sscanf(buf, "%d %d", &hmult, &vmult); |
148 |
+ |
} |
149 |
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normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
150 |
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/* open output file */ |
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if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) { |
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putc('\n', fp); |
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fprtresolu(hres*hmult, vres*vmult, fp); |
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} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
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sleep(30); /* wait for header */ |
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if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
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goto filerr; |
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getheader(fp, NULL); /* skip header */ |
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if (fscnresolu(&hr, &vr, fp) < 0 || /* check resolution */ |
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hr != hres*hmult || vr != vres*vmult) { |
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fprintf(stderr, "%s: picture resolution mismatch\n", |
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outfile); |
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fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
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> |
progname, outfile); |
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exit(1); |
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} |
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} else { |
175 |
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fprintf(stderr, "%s: cannot open\n", outfile); |
175 |
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fprintf(stderr, "%s: cannot open file \"%s\"\n", |
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progname, outfile); |
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exit(1); |
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} |
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scanorig = ftell(fp); /* record position of first scanline */ |
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if (fclose(fp) == -1) /* done with stream i/o */ |
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goto filerr; |
182 |
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sync(); /* flush NFS buffers */ |
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/* start rpict process */ |
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if (open_process(rpd, rpargv) <= 0) { |
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fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
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progname, rpargv[0]); |
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exit(1); |
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} |
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if ((scanline = (COLR *)malloc(hres*sizeof(COLR))) == NULL) { |
194 |
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if ((pbuf = (COLR *)malloc(hres*vres*sizeof(COLR))) == NULL) { |
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fprintf(stderr, "%s: out of memory\n", progname); |
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exit(1); |
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} |
198 |
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signal(SIGALRM, onalrm); |
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return; |
200 |
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filerr: |
201 |
< |
fprintf(stderr, "%s: file i/o error\n", outfile); |
201 |
> |
fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
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exit(1); |
203 |
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} |
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|
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|
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int |
207 |
+ |
nextpiece(xp, yp) /* get next piece assignment */ |
208 |
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int *xp, *yp; |
209 |
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{ |
210 |
+ |
extern char *fgets(); |
211 |
+ |
struct flock fls; |
212 |
+ |
char buf[64]; |
213 |
+ |
|
214 |
+ |
if (gotalrm) /* someone wants us to quit */ |
215 |
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return(0); |
216 |
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if (syncfd != -1) { /* use sync file */ |
217 |
+ |
fls.l_type = F_WRLCK; /* gain exclusive access */ |
218 |
+ |
fls.l_whence = 0; |
219 |
+ |
fls.l_start = 0L; |
220 |
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fls.l_len = 0L; |
221 |
+ |
fcntl(syncfd, F_SETLKW, &fls); |
222 |
+ |
lseek(syncfd, 0L, 0); |
223 |
+ |
buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
224 |
+ |
if (sscanf(buf, "%*d %*d %d %d", xp, yp) < 2) { |
225 |
+ |
*xp = hmult-1; |
226 |
+ |
*yp = vmult; |
227 |
+ |
} |
228 |
+ |
if (--(*yp) < 0) { /* decrement position */ |
229 |
+ |
*yp = vmult-1; |
230 |
+ |
if (--(*xp) < 0) { /* all done! */ |
231 |
+ |
close(syncfd); |
232 |
+ |
return(0); |
233 |
+ |
} |
234 |
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} |
235 |
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sprintf(buf, "%d %d\n%d %d\n", hmult, vmult, *xp, *yp); |
236 |
+ |
lseek(syncfd, 0L, 0); /* write new position */ |
237 |
+ |
write(syncfd, buf, strlen(buf)); |
238 |
+ |
fls.l_type = F_UNLCK; /* release sync file */ |
239 |
+ |
fcntl(syncfd, F_SETLKW, &fls); |
240 |
+ |
return(1); |
241 |
+ |
} |
242 |
+ |
if (fgets(buf, sizeof(buf), stdin) == NULL) /* use stdin */ |
243 |
+ |
return(0); |
244 |
+ |
if (sscanf(buf, "%d %d", xp, yp) == 2) |
245 |
+ |
return(1); |
246 |
+ |
fprintf(stderr, "%s: input format error\n", progname); |
247 |
+ |
exit(1); |
248 |
+ |
} |
249 |
+ |
|
250 |
+ |
|
251 |
+ |
int |
252 |
|
cleanup() /* close rpict process and clean up */ |
253 |
|
{ |
254 |
< |
register int rpstat; |
254 |
> |
register int pid; |
255 |
> |
int status, rstat = 0; |
256 |
|
|
257 |
< |
free((char *)scanline); |
257 |
> |
free((char *)pbuf); |
258 |
|
fclose(torp); |
259 |
|
fclose(fromrp); |
260 |
< |
rpstat = close_process(rpd); |
261 |
< |
if (rpstat == -1) |
262 |
< |
rpstat = 0; |
263 |
< |
return(rpstat); |
260 |
> |
while ((pid = wait(&status)) != -1) |
261 |
> |
if (rstat == 0) |
262 |
> |
rstat = status>>8 & 0xff; |
263 |
> |
return(rstat); |
264 |
|
} |
265 |
|
|
266 |
|
|
267 |
|
rpiece() /* render picture piece by piece */ |
268 |
|
{ |
196 |
– |
extern char *gets(), *strcat(); |
269 |
|
VIEW pview; |
198 |
– |
char buf[48]; |
270 |
|
int xorg, yorg; |
271 |
|
|
272 |
< |
while (gets(buf) != NULL) { |
202 |
< |
if (sscanf(buf, "%d %d", &xorg, &yorg) != 2) { |
203 |
< |
fprintf(stderr, "%s: input format error\n", progname); |
204 |
< |
exit(1); |
205 |
< |
} |
272 |
> |
while (nextpiece(&xorg, &yorg)) { |
273 |
|
copystruct(&pview, &ourview); /* compute view for piece */ |
274 |
|
switch (ourview.type) { |
275 |
|
case VT_PER: |
302 |
|
fflush(torp); /* assign piece to rpict */ |
303 |
|
putpiece(xorg, yorg); /* place piece in output */ |
304 |
|
if (verbose) { /* notify caller */ |
305 |
< |
strcat(buf, " done\n"); |
306 |
< |
writebuf(fileno(stdout), buf, strlen(buf)); |
305 |
> |
printf("%d %d done\n", xorg, yorg); |
306 |
> |
fflush(stdout); |
307 |
|
} |
308 |
|
} |
309 |
|
} |
310 |
|
|
311 |
|
|
312 |
+ |
int |
313 |
|
putpiece(xpos, ypos) /* get next piece from rpict */ |
314 |
|
int xpos, ypos; |
315 |
|
{ |
316 |
+ |
struct flock fls; |
317 |
+ |
int pid, status; |
318 |
|
int hr, vr; |
319 |
< |
int y; |
320 |
< |
|
321 |
< |
getheader(fromrp, NULL); /* discard header info. */ |
322 |
< |
if (fscnresolu(&hr, &vr, fromrp) < 0 || /* check resolution */ |
323 |
< |
hr != hres || vr != vres) { |
319 |
> |
register int y; |
320 |
> |
/* check bounds */ |
321 |
> |
if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) { |
322 |
> |
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
323 |
> |
progname, xpos, ypos); |
324 |
> |
exit(1); |
325 |
> |
} |
326 |
> |
/* check header from rpict */ |
327 |
> |
getheader(fromrp, NULL); |
328 |
> |
if (fscnresolu(&hr, &vr, fromrp) < 0 || hr != hres || vr != vres) { |
329 |
|
fprintf(stderr, "%s: resolution mismatch from %s\n", |
330 |
|
progname, rpargv[0]); |
331 |
|
exit(1); |
332 |
|
} |
333 |
< |
for (y = 0; y < vr; y++) { /* transfer scanlines */ |
334 |
< |
if (freadcolrs(scanline, hr, fromrp) < 0) { |
333 |
> |
/* load new piece into buffer */ |
334 |
> |
for (y = 0; y < vr; y++) |
335 |
> |
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
336 |
|
fprintf(stderr, "%s: read error from %s\n", |
337 |
|
progname, rpargv[0]); |
338 |
|
exit(1); |
339 |
|
} |
340 |
< |
if ((y == 0 || hmult != 1) && lseek(outfd, |
341 |
< |
scanorig+((long)((vmult-1-ypos)*vres+y)*hmult*hres+xpos*hres)*sizeof(COLR), |
342 |
< |
0) == -1) { |
343 |
< |
fprintf(stderr, "%s: seek error\n", outfile); |
344 |
< |
exit(1); |
340 |
> |
#if MAXFORK |
341 |
> |
/* fork so we don't slow rpict down */ |
342 |
> |
if ((pid = fork()) > 0) { |
343 |
> |
if (++nforked > MAXFORK) { |
344 |
> |
wait(&status); /* reap a child */ |
345 |
> |
if (status) |
346 |
> |
exit(status>>8 & 0xff); |
347 |
> |
nforked--; |
348 |
|
} |
349 |
< |
if (writebuf(outfd, (char *)scanline, hr*sizeof(COLR)) != |
350 |
< |
hr*sizeof(COLR)) { |
351 |
< |
fprintf(stderr, "%s: write error\n", outfile); |
352 |
< |
exit(1); |
349 |
> |
return(pid); |
350 |
> |
} |
351 |
> |
#else |
352 |
> |
pid = -1; /* no forking */ |
353 |
> |
#endif |
354 |
> |
/* lock file section so NFS doesn't mess up */ |
355 |
> |
fls.l_whence = 0; |
356 |
> |
fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
357 |
> |
fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
358 |
> |
fls.l_type = F_WRLCK; |
359 |
> |
fcntl(outfd, F_SETLKW, &fls); |
360 |
> |
/* write new piece to file */ |
361 |
> |
if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
362 |
> |
goto seekerr; |
363 |
> |
if (hmult == 1) { |
364 |
> |
if (writebuf(outfd, (char *)pbuf, |
365 |
> |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
366 |
> |
goto writerr; |
367 |
> |
} else |
368 |
> |
for (y = 0; y < vr; y++) { |
369 |
> |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
370 |
> |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
371 |
> |
goto writerr; |
372 |
> |
if (y < vr-1 && lseek(outfd, |
373 |
> |
(long)(hmult-1)*hr*sizeof(COLR), |
374 |
> |
1) == -1) |
375 |
> |
goto seekerr; |
376 |
|
} |
377 |
+ |
if (pid == -1) { /* fork failed */ |
378 |
+ |
fls.l_type = F_UNLCK; /* release lock */ |
379 |
+ |
fcntl(outfd, F_SETLKW, &fls); |
380 |
+ |
return(0); |
381 |
|
} |
382 |
+ |
_exit(0); /* else exit child process (releasing lock) */ |
383 |
+ |
seekerr: |
384 |
+ |
fprintf(stderr, "%s: seek error on file \"%s\"\n", progname, outfile); |
385 |
+ |
_exit(1); |
386 |
+ |
writerr: |
387 |
+ |
fprintf(stderr, "%s: write error on file \"%s\"\n", progname, outfile); |
388 |
+ |
_exit(1); |
389 |
|
} |