10 |
|
|
11 |
|
#include "standard.h" |
12 |
|
#include <fcntl.h> |
13 |
+ |
#include <signal.h> |
14 |
|
#include "color.h" |
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", }; |
32 |
< |
int rpargc = 7; |
31 |
> |
char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
32 |
> |
int rpargc = 9; |
33 |
|
int rpd[3]; |
34 |
|
FILE *torp, *fromrp; |
35 |
< |
COLR *scanline; |
35 |
> |
COLR *pbuf; |
36 |
|
/* our view parameters */ |
37 |
|
VIEW ourview = STDVIEW; |
38 |
< |
double pixaspect = 0.0; |
38 |
> |
double pixaspect = 1.0; |
39 |
|
int hres = 512, vres = 512, hmult = 2, vmult = 2; |
40 |
|
/* output file */ |
41 |
|
char *outfile = NULL; |
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; |
49 |
|
|
50 |
|
extern long lseek(), ftell(); |
51 |
|
|
52 |
+ |
int gotalrm = 0; |
53 |
+ |
int onalrm() { gotalrm++; } |
54 |
|
|
55 |
+ |
|
56 |
|
main(argc, argv) |
57 |
|
int argc; |
58 |
|
char *argv[]; |
106 |
|
break; |
107 |
|
vmult = atoi(argv[++i]); |
108 |
|
continue; |
109 |
+ |
case 'F': /* syncronization file */ |
110 |
+ |
if (argv[i][2]) |
111 |
+ |
break; |
112 |
+ |
if ((syncfd = open(argv[++i], O_RDWR)) < 0) { |
113 |
+ |
fprintf(stderr, "%s: cannot open\n", |
114 |
+ |
argv[i]); |
115 |
+ |
exit(1); |
116 |
+ |
} |
117 |
+ |
continue; |
118 |
|
case 'o': /* output file */ |
119 |
|
if (argv[i][2]) |
120 |
|
break; |
130 |
|
} |
131 |
|
init(argc, argv); |
132 |
|
rpiece(); |
133 |
< |
rval = cleanup(); |
133 |
> |
rval = cleanup(0); |
134 |
|
exit(rval); |
135 |
|
} |
136 |
|
|
148 |
|
fprintf(stderr, "%s: %s\n", progname, err); |
149 |
|
exit(1); |
150 |
|
} |
151 |
+ |
if (syncfd != -1) { |
152 |
+ |
char buf[32]; |
153 |
+ |
buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
154 |
+ |
sscanf(buf, "%d %d", &hmult, &vmult); |
155 |
+ |
} |
156 |
|
normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
157 |
|
/* open output file */ |
158 |
|
if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) { |
169 |
|
putc('\n', fp); |
170 |
|
fprtresolu(hres*hmult, vres*vmult, fp); |
171 |
|
} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
140 |
– |
sleep(30); /* wait for header */ |
172 |
|
if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
173 |
|
goto filerr; |
174 |
|
getheader(fp, NULL); /* skip header */ |
175 |
|
if (fscnresolu(&hr, &vr, fp) < 0 || /* check resolution */ |
176 |
|
hr != hres*hmult || vr != vres*vmult) { |
177 |
< |
fprintf(stderr, "%s: picture resolution mismatch\n", |
178 |
< |
outfile); |
177 |
> |
fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
178 |
> |
progname, outfile); |
179 |
|
exit(1); |
180 |
|
} |
181 |
|
} else { |
182 |
< |
fprintf(stderr, "%s: cannot open\n", outfile); |
182 |
> |
fprintf(stderr, "%s: cannot open file \"%s\"\n", |
183 |
> |
progname, outfile); |
184 |
|
exit(1); |
185 |
|
} |
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]); |
200 |
|
progname, rpargv[0]); |
201 |
|
exit(1); |
202 |
|
} |
203 |
< |
if ((scanline = (COLR *)malloc(hres*sizeof(COLR))) == NULL) { |
203 |
> |
if ((pbuf = (COLR *)malloc(hres*vres*sizeof(COLR))) == NULL) { |
204 |
|
fprintf(stderr, "%s: out of memory\n", progname); |
205 |
|
exit(1); |
206 |
|
} |
207 |
+ |
signal(SIGALRM, onalrm); |
208 |
|
return; |
209 |
|
filerr: |
210 |
< |
fprintf(stderr, "%s: file i/o error\n", outfile); |
210 |
> |
fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
211 |
|
exit(1); |
212 |
|
} |
213 |
|
|
214 |
|
|
215 |
|
int |
216 |
< |
cleanup() /* close rpict process and clean up */ |
216 |
> |
nextpiece(xp, yp) /* get next piece assignment */ |
217 |
> |
int *xp, *yp; |
218 |
|
{ |
219 |
< |
register int rpstat; |
219 |
> |
extern char *fgets(); |
220 |
> |
struct flock fls; |
221 |
> |
char buf[64]; |
222 |
|
|
223 |
< |
free((char *)scanline); |
223 |
> |
if (gotalrm) /* someone wants us to quit */ |
224 |
> |
return(0); |
225 |
> |
if (syncfd != -1) { /* use sync file */ |
226 |
> |
fls.l_type = F_WRLCK; /* gain exclusive access */ |
227 |
> |
fls.l_whence = 0; |
228 |
> |
fls.l_start = 0L; |
229 |
> |
fls.l_len = 0L; |
230 |
> |
fcntl(syncfd, F_SETLKW, &fls); |
231 |
> |
lseek(syncfd, 0L, 0); |
232 |
> |
buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
233 |
> |
if (sscanf(buf, "%*d %*d %d %d", xp, yp) < 2) { |
234 |
> |
*xp = hmult-1; |
235 |
> |
*yp = vmult; |
236 |
> |
} |
237 |
> |
if (--(*yp) < 0) { /* decrement position */ |
238 |
> |
*yp = vmult-1; |
239 |
> |
if (--(*xp) < 0) { /* all done! */ |
240 |
> |
close(syncfd); |
241 |
> |
return(0); |
242 |
> |
} |
243 |
> |
} |
244 |
> |
sprintf(buf, "%d %d\n%d %d\n", hmult, vmult, *xp, *yp); |
245 |
> |
lseek(syncfd, 0L, 0); /* write new position */ |
246 |
> |
write(syncfd, buf, strlen(buf)); |
247 |
> |
fls.l_type = F_UNLCK; /* release sync file */ |
248 |
> |
fcntl(syncfd, F_SETLKW, &fls); |
249 |
> |
return(1); |
250 |
> |
} |
251 |
> |
if (fgets(buf, sizeof(buf), stdin) == NULL) /* use stdin */ |
252 |
> |
return(0); |
253 |
> |
if (sscanf(buf, "%d %d", xp, yp) == 2) |
254 |
> |
return(1); |
255 |
> |
fprintf(stderr, "%s: input format error\n", progname); |
256 |
> |
exit(cleanup(1)); |
257 |
> |
} |
258 |
> |
|
259 |
> |
|
260 |
> |
int |
261 |
> |
cleanup(rstat) /* close rpict process and clean up */ |
262 |
> |
int rstat; |
263 |
> |
{ |
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 |
|
|
276 |
|
rpiece() /* render picture piece by piece */ |
277 |
|
{ |
196 |
– |
extern char *gets(), *strcat(); |
278 |
|
VIEW pview; |
198 |
– |
char buf[48]; |
279 |
|
int xorg, yorg; |
280 |
< |
|
281 |
< |
while (gets(buf) != NULL) { |
282 |
< |
if (sscanf(buf, "%d %d", &xorg, &yorg) != 2) { |
283 |
< |
fprintf(stderr, "%s: input format error\n", progname); |
284 |
< |
exit(1); |
285 |
< |
} |
286 |
< |
copystruct(&pview, &ourview); /* compute view for piece */ |
287 |
< |
switch (ourview.type) { |
288 |
< |
case VT_PER: |
289 |
< |
pview.horiz = 2.*180./PI*atan( |
290 |
< |
tan(PI/180./2.*ourview.horiz)/hmult ); |
291 |
< |
pview.vert = 2.*180./PI*atan( |
292 |
< |
tan(PI/180./2.*ourview.vert)/vmult ); |
293 |
< |
break; |
294 |
< |
case VT_PAR: |
295 |
< |
case VT_ANG: |
296 |
< |
pview.horiz = ourview.horiz / hmult; |
297 |
< |
pview.vert = ourview.vert / vmult; |
298 |
< |
break; |
299 |
< |
case VT_HEM: |
300 |
< |
pview.horiz = 2.*180./PI*asin( |
301 |
< |
sin(PI/180./2.*ourview.horiz)/hmult ); |
302 |
< |
pview.vert = 2.*180./PI*asin( |
303 |
< |
sin(PI/180./2.*ourview.vert)/vmult ); |
304 |
< |
break; |
305 |
< |
default: |
306 |
< |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
307 |
< |
progname, ourview.type); |
308 |
< |
exit(1); |
229 |
< |
} |
230 |
< |
pview.hoff += xorg - 0.5*(hmult-1); |
231 |
< |
pview.voff += yorg - 0.5*(vmult-1); |
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 |
> |
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 |
< |
strcat(buf, " done\n"); |
316 |
< |
writebuf(fileno(stdout), buf, strlen(buf)); |
315 |
> |
printf("%d %d done\n", xorg, yorg); |
316 |
> |
fflush(stdout); |
317 |
|
} |
318 |
|
} |
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 |
< |
int y; |
330 |
< |
|
331 |
< |
getheader(fromrp, NULL); /* discard header info. */ |
332 |
< |
if (fscnresolu(&hr, &vr, fromrp) < 0 || /* check resolution */ |
333 |
< |
hr != hres || vr != vres) { |
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(cleanup(1)); |
335 |
> |
} |
336 |
> |
/* check header from rpict */ |
337 |
> |
getheader(fromrp, 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 |
< |
for (y = 0; y < vr; y++) { /* transfer scanlines */ |
344 |
< |
if (freadcolrs(scanline, hr, fromrp) < 0) { |
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 ((y == 0 || hmult != 1) && lseek(outfd, |
351 |
< |
scanorig+((long)((vmult-1-ypos)*vres+y)*hmult*hres+xpos*hres)*sizeof(COLR), |
352 |
< |
0) == -1) { |
353 |
< |
fprintf(stderr, "%s: seek error\n", outfile); |
354 |
< |
exit(1); |
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 |
< |
if (writebuf(outfd, (char *)scanline, hr*sizeof(COLR)) != |
360 |
< |
hr*sizeof(COLR)) { |
361 |
< |
fprintf(stderr, "%s: write error\n", outfile); |
362 |
< |
exit(1); |
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 |
> |
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 (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 |
+ |
_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); |
400 |
+ |
writerr: |
401 |
+ |
fprintf(stderr, "%s: write error on file \"%s\"\n", progname, outfile); |
402 |
+ |
_exit(1); |
403 |
|
} |