| 1 |
/* Copyright (c) 1992 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 |
#include <fcntl.h> |
| 13 |
#include <signal.h> |
| 14 |
#include "color.h" |
| 15 |
#include "view.h" |
| 16 |
#include "resolu.h" |
| 17 |
|
| 18 |
/* set the following to 0 to forgo forking */ |
| 19 |
#ifndef MAXFORK |
| 20 |
#define MAXFORK 3 /* allotment of duped processes */ |
| 21 |
#endif |
| 22 |
|
| 23 |
/* rpict command */ |
| 24 |
char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
| 25 |
int rpargc = 9; |
| 26 |
int rpd[3]; |
| 27 |
FILE *torp, *fromrp; |
| 28 |
COLR *pbuf; |
| 29 |
/* our view parameters */ |
| 30 |
VIEW ourview = STDVIEW; |
| 31 |
double pixaspect = 1.0; |
| 32 |
int hres = 512, vres = 512, hmult = 2, vmult = 2; |
| 33 |
/* output file */ |
| 34 |
char *outfile = NULL; |
| 35 |
int outfd; |
| 36 |
long scanorig; |
| 37 |
int syncfd = -1; /* lock file descriptor */ |
| 38 |
int nforked = 0; |
| 39 |
|
| 40 |
char *progname; |
| 41 |
int verbose = 0; |
| 42 |
|
| 43 |
extern long lseek(), ftell(); |
| 44 |
|
| 45 |
int gotalrm = 0; |
| 46 |
int onalrm() { gotalrm++; } |
| 47 |
|
| 48 |
|
| 49 |
main(argc, argv) |
| 50 |
int argc; |
| 51 |
char *argv[]; |
| 52 |
{ |
| 53 |
register int i, rval; |
| 54 |
|
| 55 |
progname = argv[0]; |
| 56 |
for (i = 1; i < argc; i++) { |
| 57 |
if (argv[i][0] == '-') |
| 58 |
switch (argv[i][1]) { |
| 59 |
case 'v': |
| 60 |
switch (argv[i][2]) { |
| 61 |
case '\0': /* verbose option */ |
| 62 |
verbose = !verbose; |
| 63 |
continue; |
| 64 |
case 'f': /* view file */ |
| 65 |
if (viewfile(argv[++i], &ourview, NULL) <= 0) { |
| 66 |
fprintf(stderr, |
| 67 |
"%s: not a view file\n", argv[i]); |
| 68 |
exit(1); |
| 69 |
} |
| 70 |
continue; |
| 71 |
default: /* view option? */ |
| 72 |
rval = getviewopt(&ourview, argc-i, argv+i); |
| 73 |
if (rval >= 0) { |
| 74 |
i += rval; |
| 75 |
continue; |
| 76 |
} |
| 77 |
break; |
| 78 |
} |
| 79 |
break; |
| 80 |
case 'p': /* pixel aspect ratio? */ |
| 81 |
if (argv[i][2] == 'a' && !argv[i][3]) |
| 82 |
pixaspect = atof(argv[i+1]); |
| 83 |
break; |
| 84 |
case 'x': /* piece x resolution */ |
| 85 |
if (!argv[i][2]) |
| 86 |
hres = atoi(argv[i+1]); |
| 87 |
break; |
| 88 |
case 'y': /* piece y resolution */ |
| 89 |
if (!argv[i][2]) |
| 90 |
vres = atoi(argv[i+1]); |
| 91 |
break; |
| 92 |
case 'X': /* horizontal multiplier */ |
| 93 |
if (argv[i][2]) |
| 94 |
break; |
| 95 |
hmult = atoi(argv[++i]); |
| 96 |
continue; |
| 97 |
case 'Y': /* vertical multiplier */ |
| 98 |
if (argv[i][2]) |
| 99 |
break; |
| 100 |
vmult = atoi(argv[++i]); |
| 101 |
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 |
case 'o': /* output file */ |
| 112 |
if (argv[i][2]) |
| 113 |
break; |
| 114 |
outfile = argv[++i]; |
| 115 |
continue; |
| 116 |
} |
| 117 |
rpargv[rpargc++] = argv[i]; |
| 118 |
} |
| 119 |
rpargv[rpargc] = NULL; |
| 120 |
if (outfile == NULL) { |
| 121 |
fprintf(stderr, "%s: missing output file\n", argv[0]); |
| 122 |
exit(1); |
| 123 |
} |
| 124 |
init(argc, argv); |
| 125 |
rpiece(); |
| 126 |
rval = cleanup(0); |
| 127 |
exit(rval); |
| 128 |
} |
| 129 |
|
| 130 |
|
| 131 |
init(ac, av) /* set up output file and start rpict */ |
| 132 |
int ac; |
| 133 |
char **av; |
| 134 |
{ |
| 135 |
extern char VersionID[]; |
| 136 |
char *err; |
| 137 |
FILE *fp; |
| 138 |
int hr, vr; |
| 139 |
/* set up view */ |
| 140 |
if ((err = setview(&ourview)) != NULL) { |
| 141 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 142 |
exit(1); |
| 143 |
} |
| 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 |
normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
| 150 |
/* open output file */ |
| 151 |
if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) { |
| 152 |
if ((fp = fdopen(dup(outfd), "w")) == NULL) |
| 153 |
goto filerr; |
| 154 |
printargs(ac, av, fp); /* write header */ |
| 155 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
| 156 |
fputs(VIEWSTR, fp); |
| 157 |
fprintview(&ourview, fp); |
| 158 |
putc('\n', fp); |
| 159 |
if (pixaspect < .99 || pixaspect > 1.01) |
| 160 |
fputaspect(pixaspect, fp); |
| 161 |
fputformat(COLRFMT, fp); |
| 162 |
putc('\n', fp); |
| 163 |
fprtresolu(hres*hmult, vres*vmult, fp); |
| 164 |
} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
| 165 |
if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
| 166 |
goto filerr; |
| 167 |
getheader(fp, NULL); /* skip header */ |
| 168 |
if (fscnresolu(&hr, &vr, fp) < 0 || /* check resolution */ |
| 169 |
hr != hres*hmult || vr != vres*vmult) { |
| 170 |
fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
| 171 |
progname, outfile); |
| 172 |
exit(1); |
| 173 |
} |
| 174 |
} else { |
| 175 |
fprintf(stderr, "%s: cannot open file \"%s\"\n", |
| 176 |
progname, outfile); |
| 177 |
exit(1); |
| 178 |
} |
| 179 |
scanorig = ftell(fp); /* record position of first scanline */ |
| 180 |
if (fclose(fp) == -1) /* done with stream i/o */ |
| 181 |
goto filerr; |
| 182 |
sync(); /* flush NFS buffers */ |
| 183 |
/* start rpict process */ |
| 184 |
if (open_process(rpd, rpargv) <= 0) { |
| 185 |
fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
| 186 |
exit(1); |
| 187 |
} |
| 188 |
if ((fromrp = fdopen(rpd[0], "r")) == NULL || |
| 189 |
(torp = fdopen(rpd[1], "w")) == NULL) { |
| 190 |
fprintf(stderr, "%s: cannot open stream to %s\n", |
| 191 |
progname, rpargv[0]); |
| 192 |
exit(1); |
| 193 |
} |
| 194 |
if ((pbuf = (COLR *)malloc(hres*vres*sizeof(COLR))) == NULL) { |
| 195 |
fprintf(stderr, "%s: out of memory\n", progname); |
| 196 |
exit(1); |
| 197 |
} |
| 198 |
signal(SIGALRM, onalrm); |
| 199 |
return; |
| 200 |
filerr: |
| 201 |
fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
| 202 |
exit(1); |
| 203 |
} |
| 204 |
|
| 205 |
|
| 206 |
int |
| 207 |
nextpiece(xp, yp) /* get next piece assignment */ |
| 208 |
int *xp, *yp; |
| 209 |
{ |
| 210 |
extern char *fgets(); |
| 211 |
struct flock fls; |
| 212 |
char buf[64]; |
| 213 |
|
| 214 |
if (gotalrm) /* someone wants us to quit */ |
| 215 |
return(0); |
| 216 |
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 |
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 |
} |
| 235 |
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(cleanup(1)); |
| 248 |
} |
| 249 |
|
| 250 |
|
| 251 |
int |
| 252 |
cleanup(rstat) /* close rpict process and clean up */ |
| 253 |
int rstat; |
| 254 |
{ |
| 255 |
int status; |
| 256 |
|
| 257 |
free((char *)pbuf); |
| 258 |
fclose(torp); |
| 259 |
fclose(fromrp); |
| 260 |
while (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 |
{ |
| 269 |
VIEW pview; |
| 270 |
int xorg, yorg; |
| 271 |
/* compute view parameters */ |
| 272 |
copystruct(&pview, &ourview); |
| 273 |
switch (ourview.type) { |
| 274 |
case VT_PER: |
| 275 |
pview.horiz = 2.*180./PI*atan( |
| 276 |
tan(PI/180./2.*ourview.horiz)/hmult ); |
| 277 |
pview.vert = 2.*180./PI*atan( |
| 278 |
tan(PI/180./2.*ourview.vert)/vmult ); |
| 279 |
break; |
| 280 |
case VT_PAR: |
| 281 |
case VT_ANG: |
| 282 |
pview.horiz = ourview.horiz / hmult; |
| 283 |
pview.vert = ourview.vert / vmult; |
| 284 |
break; |
| 285 |
case VT_HEM: |
| 286 |
pview.horiz = 2.*180./PI*asin( |
| 287 |
sin(PI/180./2.*ourview.horiz)/hmult ); |
| 288 |
pview.vert = 2.*180./PI*asin( |
| 289 |
sin(PI/180./2.*ourview.vert)/vmult ); |
| 290 |
break; |
| 291 |
default: |
| 292 |
fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
| 293 |
progname, ourview.type); |
| 294 |
exit(cleanup(1)); |
| 295 |
} |
| 296 |
/* render each piece */ |
| 297 |
while (nextpiece(&xorg, &yorg)) { |
| 298 |
pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1); |
| 299 |
pview.voff = ourview.voff + yorg - 0.5*(vmult-1); |
| 300 |
fputs(VIEWSTR, torp); |
| 301 |
fprintview(&pview, torp); |
| 302 |
putc('\n', torp); |
| 303 |
fflush(torp); /* assigns piece to rpict */ |
| 304 |
putpiece(xorg, yorg); /* place piece in output */ |
| 305 |
if (verbose) { /* notify caller */ |
| 306 |
printf("%d %d done\n", xorg, yorg); |
| 307 |
fflush(stdout); |
| 308 |
} |
| 309 |
} |
| 310 |
} |
| 311 |
|
| 312 |
|
| 313 |
int |
| 314 |
putpiece(xpos, ypos) /* get next piece from rpict */ |
| 315 |
int xpos, ypos; |
| 316 |
{ |
| 317 |
struct flock fls; |
| 318 |
int pid, status; |
| 319 |
int hr, vr; |
| 320 |
register int y; |
| 321 |
/* check bounds */ |
| 322 |
if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) { |
| 323 |
fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
| 324 |
progname, xpos, ypos); |
| 325 |
exit(cleanup(1)); |
| 326 |
} |
| 327 |
/* check header from rpict */ |
| 328 |
getheader(fromrp, NULL); |
| 329 |
if (fscnresolu(&hr, &vr, fromrp) < 0 || hr != hres | vr != vres) { |
| 330 |
fprintf(stderr, "%s: resolution mismatch from %s\n", |
| 331 |
progname, rpargv[0]); |
| 332 |
exit(cleanup(1)); |
| 333 |
} |
| 334 |
/* load new piece into buffer */ |
| 335 |
for (y = 0; y < vr; y++) |
| 336 |
if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
| 337 |
fprintf(stderr, "%s: read error from %s\n", |
| 338 |
progname, rpargv[0]); |
| 339 |
exit(cleanup(1)); |
| 340 |
} |
| 341 |
#if MAXFORK |
| 342 |
/* fork so we don't slow rpict down */ |
| 343 |
if ((pid = fork()) > 0) { |
| 344 |
if (++nforked >= MAXFORK) { |
| 345 |
wait(&status); /* reap a child */ |
| 346 |
if (status) |
| 347 |
exit(cleanup(status>>8 & 0xff)); |
| 348 |
nforked--; |
| 349 |
} |
| 350 |
return(pid); |
| 351 |
} |
| 352 |
#else |
| 353 |
pid = -1; /* no forking */ |
| 354 |
#endif |
| 355 |
/* lock file section so NFS doesn't mess up */ |
| 356 |
fls.l_whence = 0; |
| 357 |
fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
| 358 |
fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
| 359 |
fls.l_type = F_WRLCK; |
| 360 |
fcntl(outfd, F_SETLKW, &fls); |
| 361 |
/* write new piece to file */ |
| 362 |
if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
| 363 |
goto seekerr; |
| 364 |
if (hmult == 1) { |
| 365 |
if (writebuf(outfd, (char *)pbuf, |
| 366 |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
| 367 |
goto writerr; |
| 368 |
} else |
| 369 |
for (y = 0; y < vr; y++) { |
| 370 |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
| 371 |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
| 372 |
goto writerr; |
| 373 |
if (y < vr-1 && lseek(outfd, |
| 374 |
(long)(hmult-1)*hr*sizeof(COLR), |
| 375 |
1) == -1) |
| 376 |
goto seekerr; |
| 377 |
} |
| 378 |
if (pid == -1) { /* fork failed */ |
| 379 |
fls.l_type = F_UNLCK; /* release lock */ |
| 380 |
fcntl(outfd, F_SETLKW, &fls); |
| 381 |
return(0); |
| 382 |
} |
| 383 |
_exit(0); /* else exit child process (releasing lock) */ |
| 384 |
seekerr: |
| 385 |
fprintf(stderr, "%s: seek error on file \"%s\"\n", progname, outfile); |
| 386 |
_exit(1); |
| 387 |
writerr: |
| 388 |
fprintf(stderr, "%s: write error on file \"%s\"\n", progname, outfile); |
| 389 |
_exit(1); |
| 390 |
} |
