15 |
|
#include "view.h" |
16 |
|
#include "resolu.h" |
17 |
|
|
18 |
+ |
#ifndef NFS |
19 |
+ |
#define NFS 1 |
20 |
+ |
#endif |
21 |
+ |
/* set the following to 0 to forgo forking */ |
22 |
+ |
#ifndef MAXFORK |
23 |
+ |
#if NFS |
24 |
+ |
#define MAXFORK 3 /* allotment of duped processes */ |
25 |
+ |
#else |
26 |
+ |
#define MAXFORK 0 |
27 |
+ |
#endif |
28 |
+ |
#endif |
29 |
+ |
|
30 |
|
/* rpict command */ |
31 |
|
char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
32 |
|
int rpargc = 9; |
42 |
|
int outfd; |
43 |
|
long scanorig; |
44 |
|
int syncfd = -1; /* lock file descriptor */ |
45 |
+ |
int nforked = 0; |
46 |
|
|
47 |
|
char *progname; |
48 |
|
int verbose = 0; |
130 |
|
} |
131 |
|
init(argc, argv); |
132 |
|
rpiece(); |
133 |
< |
rval = cleanup(); |
133 |
> |
rval = cleanup(0); |
134 |
|
exit(rval); |
135 |
|
} |
136 |
|
|
171 |
|
} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
172 |
|
if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
173 |
|
goto filerr; |
174 |
< |
getheader(fp, NULL); /* skip header */ |
174 |
> |
getheader(fp, NULL, NULL); /* skip header */ |
175 |
|
if (fscnresolu(&hr, &vr, fp) < 0 || /* check resolution */ |
176 |
|
hr != hres*hmult || vr != vres*vmult) { |
177 |
|
fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
186 |
|
scanorig = ftell(fp); /* record position of first scanline */ |
187 |
|
if (fclose(fp) == -1) /* done with stream i/o */ |
188 |
|
goto filerr; |
189 |
+ |
#if NFS |
190 |
|
sync(); /* flush NFS buffers */ |
191 |
+ |
#endif |
192 |
|
/* start rpict process */ |
193 |
|
if (open_process(rpd, rpargv) <= 0) { |
194 |
|
fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
253 |
|
if (sscanf(buf, "%d %d", xp, yp) == 2) |
254 |
|
return(1); |
255 |
|
fprintf(stderr, "%s: input format error\n", progname); |
256 |
< |
exit(1); |
256 |
> |
exit(cleanup(1)); |
257 |
|
} |
258 |
|
|
259 |
|
|
260 |
|
int |
261 |
< |
cleanup() /* close rpict process and clean up */ |
261 |
> |
cleanup(rstat) /* close rpict process and clean up */ |
262 |
> |
int rstat; |
263 |
|
{ |
264 |
< |
register int rpstat; |
264 |
> |
int status; |
265 |
|
|
266 |
|
free((char *)pbuf); |
267 |
|
fclose(torp); |
268 |
|
fclose(fromrp); |
269 |
< |
rpstat = close_process(rpd); |
270 |
< |
if (rpstat == -1) |
271 |
< |
rpstat = 0; |
272 |
< |
return(rpstat); |
269 |
> |
while (wait(&status) != -1) |
270 |
> |
if (rstat == 0) |
271 |
> |
rstat = status>>8 & 0xff; |
272 |
> |
return(rstat); |
273 |
|
} |
274 |
|
|
275 |
|
|
277 |
|
{ |
278 |
|
VIEW pview; |
279 |
|
int xorg, yorg; |
280 |
< |
|
280 |
> |
/* compute view parameters */ |
281 |
> |
copystruct(&pview, &ourview); |
282 |
> |
switch (ourview.type) { |
283 |
> |
case VT_PER: |
284 |
> |
pview.horiz = 2.*180./PI*atan( |
285 |
> |
tan(PI/180./2.*ourview.horiz)/hmult ); |
286 |
> |
pview.vert = 2.*180./PI*atan( |
287 |
> |
tan(PI/180./2.*ourview.vert)/vmult ); |
288 |
> |
break; |
289 |
> |
case VT_PAR: |
290 |
> |
case VT_ANG: |
291 |
> |
pview.horiz = ourview.horiz / hmult; |
292 |
> |
pview.vert = ourview.vert / vmult; |
293 |
> |
break; |
294 |
> |
case VT_HEM: |
295 |
> |
pview.horiz = 2.*180./PI*asin( |
296 |
> |
sin(PI/180./2.*ourview.horiz)/hmult ); |
297 |
> |
pview.vert = 2.*180./PI*asin( |
298 |
> |
sin(PI/180./2.*ourview.vert)/vmult ); |
299 |
> |
break; |
300 |
> |
default: |
301 |
> |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
302 |
> |
progname, ourview.type); |
303 |
> |
exit(cleanup(1)); |
304 |
> |
} |
305 |
> |
/* render each piece */ |
306 |
|
while (nextpiece(&xorg, &yorg)) { |
307 |
< |
copystruct(&pview, &ourview); /* compute view for piece */ |
308 |
< |
switch (ourview.type) { |
268 |
< |
case VT_PER: |
269 |
< |
pview.horiz = 2.*180./PI*atan( |
270 |
< |
tan(PI/180./2.*ourview.horiz)/hmult ); |
271 |
< |
pview.vert = 2.*180./PI*atan( |
272 |
< |
tan(PI/180./2.*ourview.vert)/vmult ); |
273 |
< |
break; |
274 |
< |
case VT_PAR: |
275 |
< |
case VT_ANG: |
276 |
< |
pview.horiz = ourview.horiz / hmult; |
277 |
< |
pview.vert = ourview.vert / vmult; |
278 |
< |
break; |
279 |
< |
case VT_HEM: |
280 |
< |
pview.horiz = 2.*180./PI*asin( |
281 |
< |
sin(PI/180./2.*ourview.horiz)/hmult ); |
282 |
< |
pview.vert = 2.*180./PI*asin( |
283 |
< |
sin(PI/180./2.*ourview.vert)/vmult ); |
284 |
< |
break; |
285 |
< |
default: |
286 |
< |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
287 |
< |
progname, ourview.type); |
288 |
< |
exit(1); |
289 |
< |
} |
290 |
< |
pview.hoff += xorg - 0.5*(hmult-1); |
291 |
< |
pview.voff += yorg - 0.5*(vmult-1); |
307 |
> |
pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1); |
308 |
> |
pview.voff = ourview.voff + yorg - 0.5*(vmult-1); |
309 |
|
fputs(VIEWSTR, torp); |
310 |
|
fprintview(&pview, torp); |
311 |
|
putc('\n', torp); |
312 |
< |
fflush(torp); /* assign piece to rpict */ |
312 |
> |
fflush(torp); /* assigns piece to rpict */ |
313 |
|
putpiece(xorg, yorg); /* place piece in output */ |
314 |
|
if (verbose) { /* notify caller */ |
315 |
|
printf("%d %d done\n", xorg, yorg); |
319 |
|
} |
320 |
|
|
321 |
|
|
322 |
+ |
int |
323 |
|
putpiece(xpos, ypos) /* get next piece from rpict */ |
324 |
|
int xpos, ypos; |
325 |
|
{ |
326 |
|
struct flock fls; |
327 |
+ |
int pid, status; |
328 |
|
int hr, vr; |
329 |
|
register int y; |
330 |
|
/* check bounds */ |
331 |
|
if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) { |
332 |
|
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
333 |
|
progname, xpos, ypos); |
334 |
< |
exit(1); |
334 |
> |
exit(cleanup(1)); |
335 |
|
} |
336 |
|
/* check header from rpict */ |
337 |
< |
getheader(fromrp, NULL); |
338 |
< |
if (fscnresolu(&hr, &vr, fromrp) < 0 || hr != hres || vr != vres) { |
337 |
> |
getheader(fromrp, NULL, NULL); |
338 |
> |
if (fscnresolu(&hr, &vr, fromrp) < 0 || hr != hres | vr != vres) { |
339 |
|
fprintf(stderr, "%s: resolution mismatch from %s\n", |
340 |
|
progname, rpargv[0]); |
341 |
< |
exit(1); |
341 |
> |
exit(cleanup(1)); |
342 |
|
} |
343 |
|
/* load new piece into buffer */ |
344 |
|
for (y = 0; y < vr; y++) |
345 |
|
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
346 |
|
fprintf(stderr, "%s: read error from %s\n", |
347 |
|
progname, rpargv[0]); |
348 |
< |
exit(1); |
348 |
> |
exit(cleanup(1)); |
349 |
|
} |
350 |
+ |
#if MAXFORK |
351 |
+ |
/* fork so we don't slow rpict down */ |
352 |
+ |
if ((pid = fork()) > 0) { |
353 |
+ |
if (++nforked >= MAXFORK) { |
354 |
+ |
wait(&status); /* reap a child */ |
355 |
+ |
if (status) |
356 |
+ |
exit(cleanup(status>>8 & 0xff)); |
357 |
+ |
nforked--; |
358 |
+ |
} |
359 |
+ |
return(pid); |
360 |
+ |
} |
361 |
+ |
#else |
362 |
+ |
pid = -1; /* no forking */ |
363 |
+ |
#endif |
364 |
+ |
#if NFS |
365 |
|
/* lock file section so NFS doesn't mess up */ |
366 |
|
fls.l_whence = 0; |
367 |
|
fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
368 |
|
fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
369 |
|
fls.l_type = F_WRLCK; |
370 |
|
fcntl(outfd, F_SETLKW, &fls); |
371 |
+ |
#endif |
372 |
|
/* write new piece to file */ |
373 |
|
if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
374 |
|
goto seekerr; |
375 |
< |
for (y = 0; y < vr; y++) { |
376 |
< |
if (writebuf(outfd, (char *)(pbuf+y*hr), hr*sizeof(COLR)) != |
377 |
< |
hr*sizeof(COLR)) { |
378 |
< |
fprintf(stderr, "%s: write error on file \"%s\"\n", |
379 |
< |
progname, outfile); |
380 |
< |
exit(1); |
375 |
> |
if (hmult == 1) { |
376 |
> |
if (writebuf(outfd, (char *)pbuf, |
377 |
> |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
378 |
> |
goto writerr; |
379 |
> |
} else |
380 |
> |
for (y = 0; y < vr; y++) { |
381 |
> |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
382 |
> |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
383 |
> |
goto writerr; |
384 |
> |
if (y < vr-1 && lseek(outfd, |
385 |
> |
(long)(hmult-1)*hr*sizeof(COLR), |
386 |
> |
1) == -1) |
387 |
> |
goto seekerr; |
388 |
|
} |
389 |
< |
if (hmult != 1 && y < vr-1 && lseek(outfd, |
390 |
< |
(long)(hmult-1)*hr*sizeof(COLR), 1) == -1) |
391 |
< |
goto seekerr; |
389 |
> |
if (pid == -1) { /* fork failed */ |
390 |
> |
#if NFS |
391 |
> |
fls.l_type = F_UNLCK; /* release lock */ |
392 |
> |
fcntl(outfd, F_SETLKW, &fls); |
393 |
> |
#endif |
394 |
> |
return(0); |
395 |
|
} |
396 |
< |
/* unlock file section */ |
352 |
< |
fls.l_type = F_UNLCK; |
353 |
< |
fcntl(outfd, F_SETLKW, &fls); |
354 |
< |
return; |
396 |
> |
_exit(0); /* else exit child process (releasing lock) */ |
397 |
|
seekerr: |
398 |
|
fprintf(stderr, "%s: seek error on file \"%s\"\n", progname, outfile); |
399 |
< |
exit(1); |
399 |
> |
_exit(1); |
400 |
> |
writerr: |
401 |
> |
fprintf(stderr, "%s: write error on file \"%s\"\n", progname, outfile); |
402 |
> |
_exit(1); |
403 |
|
} |