| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: pfilt.c,v 2.40 2025/06/03 21:31:51 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* pfilt.c - program to post-process picture file. |
| 6 |
* |
| 7 |
* 9/26/85 |
| 8 |
* 6/23/93 Added additional buffers for value spreading |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "copyright.h" |
| 12 |
|
| 13 |
#include <signal.h> |
| 14 |
#include "pfilt.h" |
| 15 |
#include "platform.h" |
| 16 |
#include "view.h" |
| 17 |
|
| 18 |
#define FEQ(a,b) ((a) >= .98*(b) && (a) <= 1.02*(b)) |
| 19 |
|
| 20 |
double CHECKRAD = 2.0; /* radius to check for filtering */ |
| 21 |
|
| 22 |
#define THRESHRAD 5.0 /* maximum sample spread in output */ |
| 23 |
|
| 24 |
COLOR exposure = WHTCOLOR; /* exposure for the frame */ |
| 25 |
|
| 26 |
double rad = 0.0; /* output pixel radius for filtering */ |
| 27 |
|
| 28 |
double thresh = 0.0; /* maximum contribution for subpixel */ |
| 29 |
|
| 30 |
int nrows = 0; /* number of rows for output */ |
| 31 |
int ncols = 0; /* number of columns for output */ |
| 32 |
|
| 33 |
double x_c = 1.0; /* ratio of output x size to input */ |
| 34 |
double y_r = 1.0; /* ratio of output y size to input */ |
| 35 |
|
| 36 |
int singlepass = 0; /* true means skip first pass */ |
| 37 |
|
| 38 |
int avghot = 0; /* true means average in bright spots */ |
| 39 |
|
| 40 |
double hotlvl = 100.0; /* level considered "hot" */ |
| 41 |
|
| 42 |
int npts = 0; /* (half) number of points for stars */ |
| 43 |
|
| 44 |
double spread = 1e-4; /* spread for star points */ |
| 45 |
|
| 46 |
char *tfname = NULL; |
| 47 |
|
| 48 |
char template[] = TEMPLATE; |
| 49 |
|
| 50 |
char *lampdat = "lamp.tab"; /* lamp data file */ |
| 51 |
|
| 52 |
int order; /* scanline ordering of input */ |
| 53 |
int xres, yres; /* resolution of input */ |
| 54 |
double inpaspect = 1.0; /* pixel aspect ratio of input */ |
| 55 |
int correctaspect = 0; /* aspect ratio correction? */ |
| 56 |
|
| 57 |
int wrongformat = 0; |
| 58 |
|
| 59 |
VIEW ourview = STDVIEW; |
| 60 |
int gotview = 0; |
| 61 |
int wrapfilt = 0; /* wrap filter horizontally? */ |
| 62 |
|
| 63 |
int estatus = 0; /* exit status (for non-fatal errors) */ |
| 64 |
|
| 65 |
int xrad; /* x search radius */ |
| 66 |
int yrad; /* y search radius */ |
| 67 |
int xbrad; /* x box size */ |
| 68 |
int ybrad; /* y box size */ |
| 69 |
|
| 70 |
int barsize; /* size of input scan bar */ |
| 71 |
COLORV **scanin; /* input scan bar */ |
| 72 |
COLORV *scanout; /* output scan line */ |
| 73 |
COLORV **scoutbar; /* output scan bar (if thresh > 0) */ |
| 74 |
float **greybar; /* grey-averaged input values */ |
| 75 |
int obarsize = 0; /* size of output scan bar */ |
| 76 |
int orad = 0; /* output window radius */ |
| 77 |
|
| 78 |
static void copyfile(FILE *infp, FILE *out); |
| 79 |
static void pass1(FILE *infp); |
| 80 |
static void pass2(FILE *infp); |
| 81 |
static void scan2init(void); |
| 82 |
static void scan2sync(int r); |
| 83 |
static void scan2flush(void); |
| 84 |
|
| 85 |
|
| 86 |
static double |
| 87 |
rgb_bright( |
| 88 |
SCOLOR clr |
| 89 |
) |
| 90 |
{ |
| 91 |
return(bright(clr)); |
| 92 |
} |
| 93 |
|
| 94 |
|
| 95 |
static double |
| 96 |
xyz_bright( |
| 97 |
SCOLOR clr |
| 98 |
) |
| 99 |
{ |
| 100 |
return(colval(clr,CIEY)); |
| 101 |
} |
| 102 |
|
| 103 |
|
| 104 |
static double |
| 105 |
spec_bright( |
| 106 |
SCOLOR clr |
| 107 |
) |
| 108 |
{ |
| 109 |
return(pbright(clr)); |
| 110 |
} |
| 111 |
|
| 112 |
|
| 113 |
brightfunc_t *ourbright = rgb_bright; |
| 114 |
|
| 115 |
|
| 116 |
static int |
| 117 |
headline( /* process line from header */ |
| 118 |
char *s, |
| 119 |
void *p |
| 120 |
) |
| 121 |
{ |
| 122 |
char fmt[MAXFMTLEN]; |
| 123 |
|
| 124 |
fputs(s, stdout); /* copy to output */ |
| 125 |
if (isaspect(s)) /* get aspect ratio */ |
| 126 |
inpaspect *= aspectval(s); |
| 127 |
else if (isexpos(s)) /* get exposure */ |
| 128 |
hotlvl *= exposval(s); |
| 129 |
else if (isncomp(s)) /* get #components (spectral) */ |
| 130 |
NCSAMP = ncompval(s); |
| 131 |
else if (iswlsplit(s)) /* get wavelength partitions */ |
| 132 |
wlsplitval(WLPART, s); |
| 133 |
else if (formatval(fmt, s)) { /* get format */ |
| 134 |
wrongformat = 0; |
| 135 |
if (!strcmp(COLRFMT, fmt)) |
| 136 |
ourbright = rgb_bright; |
| 137 |
else if (!strcmp(CIEFMT, fmt)) |
| 138 |
ourbright = xyz_bright; |
| 139 |
else if (!strcmp(SPECFMT, fmt)) |
| 140 |
ourbright = spec_bright; |
| 141 |
else |
| 142 |
wrongformat = !globmatch(PICFMT, fmt); |
| 143 |
} else if (isview(s) && sscanview(&ourview, s) > 0) |
| 144 |
gotview++; |
| 145 |
return(0); |
| 146 |
} |
| 147 |
|
| 148 |
|
| 149 |
int |
| 150 |
main( |
| 151 |
int argc, |
| 152 |
char **argv |
| 153 |
) |
| 154 |
{ |
| 155 |
FILE *fin; |
| 156 |
float *lampcolor; |
| 157 |
char *lamptype = NULL; |
| 158 |
long fpos; |
| 159 |
double outaspect = 0.0; |
| 160 |
double d; |
| 161 |
int i, j; |
| 162 |
|
| 163 |
fixargv0(argv[0]); /* sets global progname */ |
| 164 |
SET_DEFAULT_BINARY(); |
| 165 |
SET_FILE_BINARY(stdin); |
| 166 |
SET_FILE_BINARY(stdout); |
| 167 |
if (signal(SIGINT, quit) == SIG_IGN) |
| 168 |
signal(SIGINT, SIG_IGN); |
| 169 |
#ifdef SIGHUP |
| 170 |
if (signal(SIGHUP, quit) == SIG_IGN) |
| 171 |
signal(SIGHUP, SIG_IGN); |
| 172 |
#endif |
| 173 |
signal(SIGTERM, quit); |
| 174 |
#ifdef SIGPIPE |
| 175 |
signal(SIGPIPE, quit); |
| 176 |
#endif |
| 177 |
#ifdef SIGXCPU |
| 178 |
signal(SIGXCPU, quit); |
| 179 |
signal(SIGXFSZ, quit); |
| 180 |
#endif |
| 181 |
for (i = 1; i < argc; i++) |
| 182 |
if (argv[i][0] == '-') |
| 183 |
switch (argv[i][1]) { |
| 184 |
case 'x': |
| 185 |
i++; |
| 186 |
if (argv[i][0] == '/') { |
| 187 |
x_c = 1.0/atof(argv[i]+1); |
| 188 |
ncols = 0; |
| 189 |
} else |
| 190 |
ncols = atoi(argv[i]); |
| 191 |
break; |
| 192 |
case 'y': |
| 193 |
i++; |
| 194 |
if (argv[i][0] == '/') { |
| 195 |
y_r = 1.0/atof(argv[i]+1); |
| 196 |
nrows = 0; |
| 197 |
} else |
| 198 |
nrows = atoi(argv[i]); |
| 199 |
break; |
| 200 |
case 'c': |
| 201 |
correctaspect = !correctaspect; |
| 202 |
break; |
| 203 |
case 'p': |
| 204 |
i++; |
| 205 |
outaspect = atof(argv[i]); |
| 206 |
break; |
| 207 |
case 'e': |
| 208 |
if (argv[i+1][0] == '+' || argv[i+1][0] == '-') |
| 209 |
d = pow(2.0, atof(argv[i+1])); |
| 210 |
else |
| 211 |
d = atof(argv[i+1]); |
| 212 |
if (d < 1e-20 || d > 1e20) { |
| 213 |
fprintf(stderr, |
| 214 |
"%s: exposure out of range\n", |
| 215 |
progname); |
| 216 |
quit(1); |
| 217 |
} |
| 218 |
switch (argv[i][2]) { |
| 219 |
case '\0': |
| 220 |
scalecolor(exposure, d); |
| 221 |
break; |
| 222 |
case 'r': |
| 223 |
colval(exposure,RED) *= d; |
| 224 |
break; |
| 225 |
case 'g': |
| 226 |
colval(exposure,GRN) *= d; |
| 227 |
break; |
| 228 |
case 'b': |
| 229 |
colval(exposure,BLU) *= d; |
| 230 |
break; |
| 231 |
default: |
| 232 |
goto badopt; |
| 233 |
} |
| 234 |
i++; |
| 235 |
break; |
| 236 |
case 'f': |
| 237 |
lampdat = argv[++i]; |
| 238 |
break; |
| 239 |
case 't': |
| 240 |
lamptype = argv[++i]; |
| 241 |
break; |
| 242 |
case '1': |
| 243 |
singlepass = 1; |
| 244 |
break; |
| 245 |
case '2': |
| 246 |
singlepass = 0; |
| 247 |
break; |
| 248 |
case 'n': |
| 249 |
npts = atoi(argv[++i]) / 2; |
| 250 |
break; |
| 251 |
case 's': |
| 252 |
spread = atof(argv[++i]); |
| 253 |
break; |
| 254 |
case 'a': |
| 255 |
avghot = !avghot; |
| 256 |
break; |
| 257 |
case 'h': |
| 258 |
hotlvl = atof(argv[++i]); |
| 259 |
break; |
| 260 |
case 'r': |
| 261 |
rad = atof(argv[++i]); |
| 262 |
break; |
| 263 |
case 'm': |
| 264 |
thresh = atof(argv[++i]); |
| 265 |
if (rad <= FTINY) |
| 266 |
rad = 0.6; |
| 267 |
break; |
| 268 |
case 'b': |
| 269 |
rad = thresh = 0.0; |
| 270 |
break; |
| 271 |
default:; |
| 272 |
badopt: |
| 273 |
fprintf(stderr, "%s: unknown option: %s\n", |
| 274 |
progname, argv[i]); |
| 275 |
quit(1); |
| 276 |
break; |
| 277 |
} |
| 278 |
else |
| 279 |
break; |
| 280 |
/* get lamp data (if necessary) */ |
| 281 |
if (lamptype != NULL) { |
| 282 |
if (loadlamps(lampdat) < 0) |
| 283 |
quit(1); |
| 284 |
if ((lampcolor = matchlamp(lamptype)) == NULL) { |
| 285 |
fprintf(stderr, "%s: unknown lamp type\n", lamptype); |
| 286 |
quit(1); |
| 287 |
} |
| 288 |
for (j = 0; j < 3; j++) |
| 289 |
if (lampcolor[j] > 1e-4) |
| 290 |
colval(exposure,j) /= lampcolor[j]; |
| 291 |
freelamps(); |
| 292 |
} |
| 293 |
/* open input file */ |
| 294 |
if (i == argc) { |
| 295 |
if (singlepass) |
| 296 |
fin = stdin; |
| 297 |
else { |
| 298 |
tfname = mktemp(template); |
| 299 |
if ((fin = fopen(tfname, "w+b")) == NULL) { |
| 300 |
fprintf(stderr, "%s: can't create ", progname); |
| 301 |
fprintf(stderr, "temp file \"%s\"\n", tfname); |
| 302 |
quit(1); |
| 303 |
} |
| 304 |
copyfile(stdin, fin); |
| 305 |
if (fseek(fin, 0L, 0) == -1) { |
| 306 |
fprintf(stderr, "%s: seek fail\n", progname); |
| 307 |
quit(1); |
| 308 |
} |
| 309 |
} |
| 310 |
} else if (i == argc-1) { |
| 311 |
if ((fin = fopen(argv[i], "rb")) == NULL) { |
| 312 |
fprintf(stderr, "%s: can't open file \"%s\"\n", |
| 313 |
progname, argv[i]); |
| 314 |
quit(1); |
| 315 |
} |
| 316 |
} else { |
| 317 |
fprintf(stderr, "%s: bad # file arguments\n", progname); |
| 318 |
quit(1); |
| 319 |
} |
| 320 |
/* get header */ |
| 321 |
getheader(fin, headline, NULL); |
| 322 |
if (wrongformat) { |
| 323 |
fprintf(stderr, "%s: input must be a Radiance picture\n", |
| 324 |
progname); |
| 325 |
quit(1); |
| 326 |
} |
| 327 |
if ((ourbright == spec_bright) ^ (NCSAMP > 3) || |
| 328 |
setspectrsamp(CNDX, WLPART) < 0) { |
| 329 |
fprintf(stderr, "%s: bad number of components\n", progname); |
| 330 |
quit(1); |
| 331 |
} |
| 332 |
/* add new header info. */ |
| 333 |
printargs(i, argv, stdout); |
| 334 |
/* get picture size */ |
| 335 |
if ((order = fgetresolu(&xres, &yres, fin)) < 0) { |
| 336 |
fprintf(stderr, "%s: bad picture size\n", progname); |
| 337 |
quit(1); |
| 338 |
} |
| 339 |
if (!(order & YMAJOR)) |
| 340 |
inpaspect = 1.0/inpaspect; |
| 341 |
/* wrap around for cylindrical view? */ |
| 342 |
wrapfilt = gotview && ourview.type == VT_CYL && |
| 343 |
ourview.horiz >= 360.-FTINY && order & YMAJOR; |
| 344 |
/* compute output resolution */ |
| 345 |
if (ncols <= 0) |
| 346 |
ncols = x_c*xres + .5; |
| 347 |
if (nrows <= 0) |
| 348 |
nrows = y_r*yres + .5; |
| 349 |
if (outaspect > .01) { |
| 350 |
d = inpaspect * yres/xres / outaspect; |
| 351 |
if (d * ncols > nrows) |
| 352 |
ncols = nrows / d; |
| 353 |
else |
| 354 |
nrows = ncols * d; |
| 355 |
} |
| 356 |
x_c = (double)ncols/xres; |
| 357 |
y_r = (double)nrows/yres; |
| 358 |
|
| 359 |
if (singlepass) { /* skip exposure, etc. */ |
| 360 |
pass1default(); |
| 361 |
pass2(fin); |
| 362 |
quit(0); |
| 363 |
} |
| 364 |
|
| 365 |
fpos = ftell(fin); /* save input file position */ |
| 366 |
|
| 367 |
pass1(fin); |
| 368 |
|
| 369 |
if (fseek(fin, fpos, 0) == -1) { |
| 370 |
fprintf(stderr, "%s: seek fail\n", progname); |
| 371 |
quit(1); |
| 372 |
} |
| 373 |
pass2(fin); |
| 374 |
|
| 375 |
quit(estatus); |
| 376 |
return estatus; /* pro forma return */ |
| 377 |
} |
| 378 |
|
| 379 |
|
| 380 |
static void |
| 381 |
copyfile( /* copy a file */ |
| 382 |
FILE *infp, |
| 383 |
FILE *out |
| 384 |
) |
| 385 |
{ |
| 386 |
int c; |
| 387 |
|
| 388 |
while ((c = getc(infp)) != EOF) |
| 389 |
putc(c, out); |
| 390 |
|
| 391 |
if (ferror(out)) { |
| 392 |
fprintf(stderr, "%s: write error in copyfile\n", progname); |
| 393 |
quit(1); |
| 394 |
} |
| 395 |
} |
| 396 |
|
| 397 |
|
| 398 |
static void |
| 399 |
pass1( /* first pass of picture file */ |
| 400 |
FILE *infp |
| 401 |
) |
| 402 |
{ |
| 403 |
int i; |
| 404 |
COLORV *scan; |
| 405 |
|
| 406 |
pass1init(); |
| 407 |
|
| 408 |
scan = (COLORV *)malloc(xres*NCSAMP*sizeof(COLORV)); |
| 409 |
if (scan == NULL) { |
| 410 |
fprintf(stderr, "%s: out of memory\n", progname); |
| 411 |
quit(1); |
| 412 |
} |
| 413 |
for (i = 0; i < yres; i++) { |
| 414 |
if (freadsscan(scan, NCSAMP, xres, infp) < 0) { |
| 415 |
nrows = (long)nrows * i / yres; /* adjust frame */ |
| 416 |
if (nrows <= 0) { |
| 417 |
fprintf(stderr, "%s: empty frame\n", progname); |
| 418 |
quit(1); |
| 419 |
} |
| 420 |
fprintf(stderr, "%s: warning - partial frame (%d%%)\n", |
| 421 |
progname, (int)(100L*i/yres)); |
| 422 |
yres = i; |
| 423 |
y_r = (double)nrows/yres; |
| 424 |
estatus++; |
| 425 |
break; |
| 426 |
} |
| 427 |
pass1scan(scan, i); |
| 428 |
} |
| 429 |
free(scan); |
| 430 |
} |
| 431 |
|
| 432 |
|
| 433 |
static void |
| 434 |
pass2( /* last pass on file, write to stdout */ |
| 435 |
FILE *infp |
| 436 |
) |
| 437 |
{ |
| 438 |
int yread; |
| 439 |
int ycent, xcent; |
| 440 |
int r, c; |
| 441 |
|
| 442 |
pass2init(); |
| 443 |
scan2init(); |
| 444 |
yread = 0; |
| 445 |
for (r = 0; r < nrows; r++) { |
| 446 |
ycent = (r+.5)*yres/nrows; |
| 447 |
while (yread <= ycent+yrad) { |
| 448 |
if (yread < yres) { |
| 449 |
if (freadsscan(scanin[yread%barsize], |
| 450 |
NCSAMP, xres, infp) < 0) { |
| 451 |
fprintf(stderr, |
| 452 |
"%s: truncated input (y=%d)\n", |
| 453 |
progname, yres-1-yread); |
| 454 |
quit(1); |
| 455 |
} |
| 456 |
pass2scan(scanin[yread%barsize], yread); |
| 457 |
} |
| 458 |
yread++; |
| 459 |
} |
| 460 |
if (obarsize > 0) /* => thresh > FTINY */ |
| 461 |
scan2sync(r); |
| 462 |
for (c = 0; c < ncols; c++) { |
| 463 |
xcent = (c+.5)*xres/ncols; |
| 464 |
if (thresh > FTINY) |
| 465 |
dothresh(xcent, ycent, c, r); |
| 466 |
else if (rad > FTINY) |
| 467 |
dogauss(scanout+c*NCSAMP, xcent, ycent, c, r); |
| 468 |
else |
| 469 |
dobox(scanout+c*NCSAMP, xcent, ycent, c, r); |
| 470 |
} |
| 471 |
if (scanout != NULL && fwritesscan(scanout, NCSAMP, ncols, stdout) < 0) { |
| 472 |
fprintf(stderr, "%s: write error in pass2\n", progname); |
| 473 |
quit(1); |
| 474 |
} |
| 475 |
} |
| 476 |
/* skip leftover input */ |
| 477 |
while (yread < yres) { |
| 478 |
if (freadscolrs((uby8 *)tempbuffer(xres*(NCSAMP+1)), |
| 479 |
NCSAMP, xres, infp) < 0) |
| 480 |
break; |
| 481 |
yread++; |
| 482 |
} |
| 483 |
scan2flush(); /* flush output */ |
| 484 |
} |
| 485 |
|
| 486 |
|
| 487 |
static void |
| 488 |
scan2init(void) /* prepare scanline arrays */ |
| 489 |
{ |
| 490 |
COLOR ctmp; |
| 491 |
double d; |
| 492 |
int i; |
| 493 |
|
| 494 |
xbrad = xres/ncols/2 + 1; |
| 495 |
ybrad = yres/nrows/2 + 1; |
| 496 |
if (rad > FTINY) { |
| 497 |
if (nrows >= yres && ncols >= xres) |
| 498 |
rad *= (y_r + x_c)/2.0; |
| 499 |
|
| 500 |
if (thresh > FTINY) { |
| 501 |
orad = CHECKRAD*THRESHRAD*rad + 1; |
| 502 |
xrad = orad/x_c + xbrad; |
| 503 |
yrad = orad/y_r + ybrad; |
| 504 |
obarsize = 2*orad + 1; |
| 505 |
} else { |
| 506 |
xrad = CHECKRAD*rad/x_c + 1; |
| 507 |
yrad = CHECKRAD*rad/y_r + 1; |
| 508 |
} |
| 509 |
initmask(); /* initialize filter table */ |
| 510 |
} else { |
| 511 |
xrad = xbrad; |
| 512 |
yrad = ybrad; |
| 513 |
} |
| 514 |
barsize = 2*yrad + 1; |
| 515 |
scanin = (COLORV **)malloc(barsize*sizeof(COLORV *)); |
| 516 |
if (scanin == NULL) |
| 517 |
goto memerr; |
| 518 |
for (i = 0; i < barsize; i++) { |
| 519 |
scanin[i] = (COLORV *)malloc(xres*NCSAMP*sizeof(COLORV)); |
| 520 |
if (scanin[i] == NULL) |
| 521 |
goto memerr; |
| 522 |
} |
| 523 |
if (obarsize > 0) { |
| 524 |
scoutbar = (COLORV **)malloc(obarsize*sizeof(COLORV *)); |
| 525 |
greybar = (float **)malloc(obarsize*sizeof(float *)); |
| 526 |
if ((scoutbar == NULL) | (greybar == NULL)) |
| 527 |
goto memerr; |
| 528 |
for (i = 0; i < obarsize; i++) { |
| 529 |
scoutbar[i] = (COLORV *)malloc(ncols*NCSAMP*sizeof(COLORV)); |
| 530 |
greybar[i] = (float *)malloc(ncols*sizeof(float)); |
| 531 |
if ((scoutbar[i] == NULL) | (greybar[i] == NULL)) |
| 532 |
goto memerr; |
| 533 |
} |
| 534 |
} else { |
| 535 |
scanout = (COLORV *)malloc(ncols*NCSAMP*sizeof(COLORV)); |
| 536 |
if (scanout == NULL) |
| 537 |
goto memerr; |
| 538 |
} |
| 539 |
/* record pixel aspect ratio */ |
| 540 |
if (!correctaspect) { |
| 541 |
d = order & YMAJOR ? x_c/y_r : y_r/x_c ; |
| 542 |
if (!FEQ(d,1.0)) |
| 543 |
fputaspect(d, stdout); |
| 544 |
} |
| 545 |
/* record exposure */ |
| 546 |
d = bright(exposure); |
| 547 |
if (!FEQ(d,1.0)) |
| 548 |
fputexpos(d, stdout); |
| 549 |
/* record color correction */ |
| 550 |
copycolor(ctmp, exposure); |
| 551 |
scalecolor(ctmp, 1.0/d); |
| 552 |
if (!FEQ(colval(ctmp,RED),colval(ctmp,GRN)) || |
| 553 |
!FEQ(colval(ctmp,GRN),colval(ctmp,BLU))) |
| 554 |
fputcolcor(ctmp, stdout); |
| 555 |
printf("\n"); |
| 556 |
/* write out resolution */ |
| 557 |
fputresolu(order, ncols, nrows, stdout); |
| 558 |
return; |
| 559 |
memerr: |
| 560 |
fprintf(stderr, "%s: out of memory\n", progname); |
| 561 |
quit(1); |
| 562 |
} |
| 563 |
|
| 564 |
|
| 565 |
static void |
| 566 |
scan2sync( /* synchronize grey averages and output scan */ |
| 567 |
int r |
| 568 |
) |
| 569 |
{ |
| 570 |
static int nextrow = 0; |
| 571 |
SCOLOR ctmp; |
| 572 |
int ybot; |
| 573 |
int c; |
| 574 |
/* average input scanlines */ |
| 575 |
while (nextrow <= r+orad && nextrow < nrows) { |
| 576 |
ybot = (nextrow+.5)*yres/nrows; |
| 577 |
for (c = 0; c < ncols; c++) { |
| 578 |
dobox(ctmp, (int)((c+.5)*xres/ncols),ybot, c,nextrow); |
| 579 |
greybar[nextrow%obarsize][c] = (*ourbright)(ctmp); |
| 580 |
} |
| 581 |
/* and zero output scanline */ |
| 582 |
memset(scoutbar[nextrow%obarsize], 0, ncols*NCSAMP*sizeof(COLORV)); |
| 583 |
nextrow++; |
| 584 |
} |
| 585 |
/* point to top scanline for output */ |
| 586 |
if (r-orad >= 0) |
| 587 |
scanout = scoutbar[(r-orad)%obarsize]; |
| 588 |
else |
| 589 |
scanout = NULL; |
| 590 |
} |
| 591 |
|
| 592 |
|
| 593 |
static void |
| 594 |
scan2flush(void) /* flush output buffer */ |
| 595 |
{ |
| 596 |
int r; |
| 597 |
|
| 598 |
for (r = nrows-orad; r < nrows; r++) |
| 599 |
if (fwritesscan(scoutbar[r%obarsize], NCSAMP, ncols, stdout) < 0) |
| 600 |
break; |
| 601 |
if (fflush(stdout) < 0) { |
| 602 |
fprintf(stderr, "%s: write error at end of pass2\n", progname); |
| 603 |
quit(1); |
| 604 |
} |
| 605 |
} |
| 606 |
|
| 607 |
|
| 608 |
void |
| 609 |
quit(code) /* remove temporary file and exit */ |
| 610 |
int code; |
| 611 |
{ |
| 612 |
if (tfname != NULL) |
| 613 |
unlink(tfname); |
| 614 |
exit(code); |
| 615 |
} |
