| 20 |
|
int rpargc = 9; |
| 21 |
|
int rpd[3]; |
| 22 |
|
FILE *torp, *fromrp; |
| 23 |
< |
COLR *scanline; |
| 23 |
> |
COLR *pbuf; |
| 24 |
|
/* our view parameters */ |
| 25 |
|
VIEW ourview = STDVIEW; |
| 26 |
|
double pixaspect = 1.0; |
| 161 |
|
getheader(fp, NULL); /* skip header */ |
| 162 |
|
if (fscnresolu(&hr, &vr, fp) < 0 || /* check resolution */ |
| 163 |
|
hr != hres*hmult || vr != vres*vmult) { |
| 164 |
< |
fprintf(stderr, "%s: picture resolution mismatch\n", |
| 165 |
< |
outfile); |
| 164 |
> |
fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
| 165 |
> |
progname, outfile); |
| 166 |
|
exit(1); |
| 167 |
|
} |
| 168 |
|
} else { |
| 169 |
< |
fprintf(stderr, "%s: cannot open\n", outfile); |
| 169 |
> |
fprintf(stderr, "%s: cannot open file \"%s\"\n", |
| 170 |
> |
progname, outfile); |
| 171 |
|
exit(1); |
| 172 |
|
} |
| 173 |
|
scanorig = ftell(fp); /* record position of first scanline */ |
| 174 |
|
if (fclose(fp) == -1) /* done with stream i/o */ |
| 175 |
|
goto filerr; |
| 176 |
+ |
sync(); /* flush NFS buffers */ |
| 177 |
|
/* start rpict process */ |
| 178 |
|
if (open_process(rpd, rpargv) <= 0) { |
| 179 |
|
fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
| 185 |
|
progname, rpargv[0]); |
| 186 |
|
exit(1); |
| 187 |
|
} |
| 188 |
< |
if ((scanline = (COLR *)malloc(hres*sizeof(COLR))) == NULL) { |
| 188 |
> |
if ((pbuf = (COLR *)malloc(hres*vres*sizeof(COLR))) == NULL) { |
| 189 |
|
fprintf(stderr, "%s: out of memory\n", progname); |
| 190 |
|
exit(1); |
| 191 |
|
} |
| 192 |
|
signal(SIGALRM, onalrm); |
| 193 |
|
return; |
| 194 |
|
filerr: |
| 195 |
< |
fprintf(stderr, "%s: file i/o error\n", outfile); |
| 195 |
> |
fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
| 196 |
|
exit(1); |
| 197 |
|
} |
| 198 |
|
|
| 216 |
|
lseek(syncfd, 0L, 0); |
| 217 |
|
buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
| 218 |
|
if (sscanf(buf, "%*d %*d %d %d", xp, yp) < 2) { |
| 217 |
– |
*xp = hmult; |
| 218 |
– |
*yp = vmult-1; |
| 219 |
– |
} |
| 220 |
– |
if (--(*xp) < 0) { /* decrement position */ |
| 219 |
|
*xp = hmult-1; |
| 220 |
< |
if (--(*yp) < 0) { /* all done! */ |
| 220 |
> |
*yp = vmult; |
| 221 |
> |
} |
| 222 |
> |
if (--(*yp) < 0) { /* decrement position */ |
| 223 |
> |
*yp = vmult-1; |
| 224 |
> |
if (--(*xp) < 0) { /* all done! */ |
| 225 |
|
close(syncfd); |
| 226 |
|
return(0); |
| 227 |
|
} |
| 247 |
|
{ |
| 248 |
|
register int rpstat; |
| 249 |
|
|
| 250 |
< |
free((char *)scanline); |
| 250 |
> |
free((char *)pbuf); |
| 251 |
|
fclose(torp); |
| 252 |
|
fclose(fromrp); |
| 253 |
|
rpstat = close_process(rpd); |
| 307 |
|
{ |
| 308 |
|
struct flock fls; |
| 309 |
|
int hr, vr; |
| 310 |
< |
int y; |
| 311 |
< |
|
| 310 |
> |
register int y; |
| 311 |
> |
/* check bounds */ |
| 312 |
|
if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) { |
| 313 |
|
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
| 314 |
|
progname, xpos, ypos); |
| 315 |
|
exit(1); |
| 316 |
|
} |
| 317 |
< |
getheader(fromrp, NULL); /* discard header info. */ |
| 318 |
< |
if (fscnresolu(&hr, &vr, fromrp) < 0 || /* check resolution */ |
| 319 |
< |
hr != hres || vr != vres) { |
| 317 |
> |
/* check header from rpict */ |
| 318 |
> |
getheader(fromrp, NULL); |
| 319 |
> |
if (fscnresolu(&hr, &vr, fromrp) < 0 || hr != hres || vr != vres) { |
| 320 |
|
fprintf(stderr, "%s: resolution mismatch from %s\n", |
| 321 |
|
progname, rpargv[0]); |
| 322 |
|
exit(1); |
| 323 |
|
} |
| 324 |
< |
fls.l_whence = 1; |
| 325 |
< |
fls.l_start = 0L; |
| 326 |
< |
fls.l_len = hr*sizeof(COLR); |
| 325 |
< |
for (y = 0; y < vr; y++) { /* transfer scanlines */ |
| 326 |
< |
if (freadcolrs(scanline, hr, fromrp) < 0) { |
| 324 |
> |
/* load new piece into buffer */ |
| 325 |
> |
for (y = 0; y < vr; y++) |
| 326 |
> |
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
| 327 |
|
fprintf(stderr, "%s: read error from %s\n", |
| 328 |
|
progname, rpargv[0]); |
| 329 |
|
exit(1); |
| 330 |
|
} |
| 331 |
< |
if ((y == 0 || hmult != 1) && lseek(outfd, |
| 332 |
< |
scanorig+((long)((vmult-1-ypos)*vres+y)*hmult*hres+xpos*hres)*sizeof(COLR), |
| 333 |
< |
0) == -1) { |
| 334 |
< |
fprintf(stderr, "%s: seek error\n", outfile); |
| 335 |
< |
exit(1); |
| 336 |
< |
} |
| 337 |
< |
fls.l_type = F_WRLCK; |
| 338 |
< |
fcntl(outfd, F_SETLKW, &fls); |
| 339 |
< |
if (writebuf(outfd, (char *)scanline, hr*sizeof(COLR)) != |
| 331 |
> |
/* lock file section so NFS doesn't mess up */ |
| 332 |
> |
fls.l_whence = 0; |
| 333 |
> |
fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
| 334 |
> |
fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
| 335 |
> |
fls.l_type = F_WRLCK; |
| 336 |
> |
fcntl(outfd, F_SETLKW, &fls); |
| 337 |
> |
/* write new piece to file */ |
| 338 |
> |
if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
| 339 |
> |
goto seekerr; |
| 340 |
> |
for (y = 0; y < vr; y++) { |
| 341 |
> |
if (writebuf(outfd, (char *)(pbuf+y*hr), hr*sizeof(COLR)) != |
| 342 |
|
hr*sizeof(COLR)) { |
| 343 |
< |
fprintf(stderr, "%s: write error\n", outfile); |
| 343 |
> |
fprintf(stderr, "%s: write error on file \"%s\"\n", |
| 344 |
> |
progname, outfile); |
| 345 |
|
exit(1); |
| 346 |
|
} |
| 347 |
< |
fls.l_type = F_UNLCK; |
| 348 |
< |
fcntl(outfd, F_SETLKW, &fls); |
| 347 |
> |
if (hmult != 1 && y < vr-1 && lseek(outfd, |
| 348 |
> |
(long)(hmult-1)*hr*sizeof(COLR), 1) == -1) |
| 349 |
> |
goto seekerr; |
| 350 |
|
} |
| 351 |
+ |
/* unlock file section */ |
| 352 |
+ |
fls.l_type = F_UNLCK; |
| 353 |
+ |
fcntl(outfd, F_SETLKW, &fls); |
| 354 |
+ |
return; |
| 355 |
+ |
seekerr: |
| 356 |
+ |
fprintf(stderr, "%s: seek error on file \"%s\"\n", progname, outfile); |
| 357 |
+ |
exit(1); |
| 358 |
|
} |
