| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: srcskipload.c,v 2.2 2024/12/13 00:48:19 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Load source exclusion maps (BMP and MTX) |
| 6 |
* |
| 7 |
* External symbols declared in source.h |
| 8 |
*/ |
| 9 |
|
| 10 |
#ifdef SSKIPOPT /* currently an optional compile */ |
| 11 |
|
| 12 |
#include "copyright.h" |
| 13 |
|
| 14 |
#include "platform.h" |
| 15 |
#include "paths.h" |
| 16 |
#include "ray.h" |
| 17 |
#include "source.h" |
| 18 |
#include "bmpfile.h" |
| 19 |
#include "resolu.h" |
| 20 |
|
| 21 |
int sskip_dim[2] = {0,0}; /* source skip image size */ |
| 22 |
|
| 23 |
/* correction file types */ |
| 24 |
enum {CFnone=0, CFfloatY, CFbmpY8}; |
| 25 |
|
| 26 |
/* struct for bitmap file loading */ |
| 27 |
typedef struct skipbmp { |
| 28 |
struct skipbmp *next; /* next in skip list */ |
| 29 |
BMPReader *bmp; /* BMP file reader */ |
| 30 |
uby8 *sfl; /* corresponding sources */ |
| 31 |
char bname[1]; /* BMP file name */ |
| 32 |
} SKIPBMP; |
| 33 |
|
| 34 |
/* holder for source exclusion images */ |
| 35 |
struct { |
| 36 |
SKIPBMP *sbmplist; /* list of BMP inputs */ |
| 37 |
int cftype; /* correction file type */ |
| 38 |
union { |
| 39 |
struct { |
| 40 |
int fd; |
| 41 |
int dstart; |
| 42 |
} Y; /* float Y input */ |
| 43 |
BMPReader *bmp; /* BMP input pointer */ |
| 44 |
} cf; /* correction file input */ |
| 45 |
int *ndxmap; /* allocated index map */ |
| 46 |
float *corrmap; /* allocated correction map */ |
| 47 |
char cfname[MAXSTR]; /* correction file name */ |
| 48 |
} skipin; /* just need the one */ |
| 49 |
|
| 50 |
/* call-back for matrix header line */ |
| 51 |
static int |
| 52 |
check_mtx(char *hl, void *p) |
| 53 |
{ |
| 54 |
int *dim = (int *)p; |
| 55 |
char fmt[MAXFMTLEN]; |
| 56 |
int rv; |
| 57 |
|
| 58 |
if ((rv = isbigendian(hl)) >= 0) { |
| 59 |
if (rv != nativebigendian()) { |
| 60 |
eputs("cannot handle byte-swapped data\n"); |
| 61 |
return(-1); |
| 62 |
} |
| 63 |
return(1); |
| 64 |
} |
| 65 |
if (!strncmp(hl, "NCOLS=", 6)) { |
| 66 |
dim[0] = atoi(hl+6); |
| 67 |
if (dim[0] <= 0) |
| 68 |
return(-1); |
| 69 |
return(1); |
| 70 |
} |
| 71 |
if (!strncmp(hl, "NROWS=", 6)) { |
| 72 |
dim[1] = atoi(hl+6); |
| 73 |
if (dim[1] <= 0) |
| 74 |
return(-1); |
| 75 |
return(1); |
| 76 |
} |
| 77 |
if (isncomp(hl)) { |
| 78 |
if (ncompval(hl) != 1) { |
| 79 |
eputs("require single component\n"); |
| 80 |
return(-1); |
| 81 |
} |
| 82 |
return(1); |
| 83 |
} |
| 84 |
if (formatval(fmt, hl)) { |
| 85 |
if (strcmp(fmt, "float")) { |
| 86 |
eputs("require binary float format\n"); |
| 87 |
return(-1); |
| 88 |
} |
| 89 |
return(1); |
| 90 |
} |
| 91 |
return(0); |
| 92 |
} |
| 93 |
|
| 94 |
/* private call to open floating-point matrix and check dimensions */ |
| 95 |
static void |
| 96 |
open_float_mtx() |
| 97 |
{ |
| 98 |
int mydim[2]; |
| 99 |
FILE *fp; |
| 100 |
|
| 101 |
skipin.cf.Y.fd = open(skipin.cfname, O_RDONLY); |
| 102 |
if (skipin.cf.Y.fd < 0) { |
| 103 |
sprintf(errmsg, "cannot open matrix '%s'", skipin.cfname); |
| 104 |
error(SYSTEM, errmsg); |
| 105 |
} |
| 106 |
SET_FD_BINARY(skipin.cf.Y.fd); /* get temporary FILE pointer */ |
| 107 |
fp = fdopen(dup(skipin.cf.Y.fd), "rb"); |
| 108 |
if (fp == NULL) |
| 109 |
error(SYSTEM, "out of memory in open_float_mtx()"); |
| 110 |
mydim[0] = mydim[1] = 0; /* check header format, etc. */ |
| 111 |
if (getheader(fp, check_mtx, mydim) < 0) |
| 112 |
goto badheader; |
| 113 |
if (!mydim[0] | !mydim[1] && |
| 114 |
!fscnresolu(&mydim[0], &mydim[1], fp)) |
| 115 |
goto badheader; |
| 116 |
if ((mydim[0] == sskip_dim[0]) & (mydim[1] == sskip_dim[1])) { |
| 117 |
skipin.cf.Y.dstart = ftell(fp); |
| 118 |
fclose(fp); |
| 119 |
return; /* lookin' good! */ |
| 120 |
} |
| 121 |
badheader: |
| 122 |
sprintf(errmsg, "incompatible header for matrix '%s'", skipin.cfname); |
| 123 |
error(USER, errmsg); |
| 124 |
fclose(fp); |
| 125 |
} |
| 126 |
|
| 127 |
/* Open a set of bitmaps corresponding to loaded sources w/ corrections */ |
| 128 |
int |
| 129 |
srcskip_open(char *bmpspec, char *scorrimg) |
| 130 |
{ |
| 131 |
int bmcnt = 0; |
| 132 |
char fname[MAXSTR]; |
| 133 |
char *sfx; |
| 134 |
int sn; |
| 135 |
|
| 136 |
srcskip_free_maps(); /* clear previous */ |
| 137 |
srcskip_close(); |
| 138 |
sskip_dim[0] = sskip_dim[1] = 0; |
| 139 |
if (!nsources) { |
| 140 |
sskip_rsi(NULL); |
| 141 |
return(0); |
| 142 |
} |
| 143 |
if (bmpspec == NULL) |
| 144 |
return(0); |
| 145 |
if (strstr(bmpspec, "%s") == NULL) |
| 146 |
error(USER, "missing '%s' in source skip BMP file spec"); |
| 147 |
if (ssf_select == NULL) /* starting fresh? */ |
| 148 |
ssf_select = sskip_new(); |
| 149 |
if (scorrimg == NULL) /* no correction map? */ |
| 150 |
skipin.cfname[0] = '\0'; |
| 151 |
else |
| 152 |
strcpy(skipin.cfname, scorrimg); |
| 153 |
skipin.cftype = CFnone; /* open input BMPs */ |
| 154 |
for (sn = 0; sn < nsources; sn++) { |
| 155 |
OBJECT mod; |
| 156 |
const char *modname; |
| 157 |
SKIPBMP *sbmp; |
| 158 |
int sn1; |
| 159 |
if (source[sn].sflags & (SSKIP|SVIRTUAL) || |
| 160 |
sskip_chk(ssf_select, sn)) |
| 161 |
continue; |
| 162 |
mod = source[sn].so->omod; |
| 163 |
modname = objptr(mod)->oname; |
| 164 |
sprintf(fname, bmpspec, modname); |
| 165 |
if (access(fname, R_OK) < 0) |
| 166 |
continue; /* none such input */ |
| 167 |
/* else check it out */ |
| 168 |
sbmp = (SKIPBMP *)emalloc(sizeof(SKIPBMP)+strlen(fname)); |
| 169 |
strcpy(sbmp->bname, fname); |
| 170 |
sbmp->bmp = BMPopenInputFile(fname); |
| 171 |
if (sbmp->bmp == NULL) { |
| 172 |
sprintf(errmsg, "cannot open bitmap '%s'", fname); |
| 173 |
error(SYSTEM, errmsg); |
| 174 |
} |
| 175 |
if (sbmp->bmp->hdr->nColors > 2) { |
| 176 |
sprintf(errmsg, "expected bilevel bitmap in '%s'", fname); |
| 177 |
error(USER, errmsg); |
| 178 |
} |
| 179 |
if (!sbmp->bmp->hdr->yIsDown) { |
| 180 |
sprintf(errmsg, "bad orientation for '%s'", fname); |
| 181 |
error(INTERNAL, errmsg); |
| 182 |
} |
| 183 |
if (skipin.sbmplist == NULL) { |
| 184 |
sskip_dim[0] = sbmp->bmp->hdr->width; |
| 185 |
sskip_dim[1] = sbmp->bmp->hdr->height; |
| 186 |
} else if ((sbmp->bmp->hdr->width != sskip_dim[0]) | |
| 187 |
(sbmp->bmp->hdr->height != sskip_dim[1])) { |
| 188 |
sprintf(errmsg, "dimensions do not match for '%s'", |
| 189 |
fname); |
| 190 |
error(USER, errmsg); |
| 191 |
} |
| 192 |
/* flag this light source */ |
| 193 |
sbmp->sfl = sskip_new(); |
| 194 |
sskip_set(sbmp->sfl, sn); |
| 195 |
/* flag others w/ same modifier */ |
| 196 |
for (sn1 = sn; ++sn1 < nsources; ) { |
| 197 |
OBJECT mod1; |
| 198 |
if (source[sn1].sflags & (SSKIP|SVIRTUAL) || |
| 199 |
sskip_chk(ssf_select, sn1)) |
| 200 |
continue; |
| 201 |
mod1 = source[sn1].so->omod; |
| 202 |
if (mod1 == mod || !strcmp(objptr(mod1)->oname, modname)) |
| 203 |
sskip_set(sbmp->sfl, sn1); |
| 204 |
} |
| 205 |
sskip_addflags(ssf_select, sbmp->sfl); |
| 206 |
sbmp->next = skipin.sbmplist; |
| 207 |
skipin.sbmplist = sbmp; |
| 208 |
bmcnt++; |
| 209 |
} |
| 210 |
if (!bmcnt) { |
| 211 |
sprintf(errmsg, "no matching BMP input files for '%s'", bmpspec); |
| 212 |
error(WARNING, errmsg); |
| 213 |
return(0); |
| 214 |
} |
| 215 |
if (!skipin.cfname[0]) /* no correction image? */ |
| 216 |
return(bmcnt); |
| 217 |
/* else open correction image */ |
| 218 |
sfx = skipin.cfname; /* find file type */ |
| 219 |
while (*sfx) sfx++; |
| 220 |
while (--sfx > skipin.cfname && !ISDIRSEP(*sfx)) |
| 221 |
if (*sfx == '.') { |
| 222 |
if (!strcasecmp(sfx, ".mtx")) |
| 223 |
skipin.cftype = CFfloatY; |
| 224 |
else if (!strcasecmp(sfx, ".bmp")) |
| 225 |
skipin.cftype = CFbmpY8; |
| 226 |
break; |
| 227 |
} |
| 228 |
switch (skipin.cftype) { |
| 229 |
case CFfloatY: |
| 230 |
open_float_mtx(); |
| 231 |
break; |
| 232 |
case CFbmpY8: |
| 233 |
skipin.cf.bmp = BMPopenInputFile(skipin.cfname); |
| 234 |
if (skipin.cf.bmp == NULL) { |
| 235 |
sprintf(errmsg, "cannot open image '%s'", skipin.cfname); |
| 236 |
error(SYSTEM, errmsg); |
| 237 |
} |
| 238 |
if (!skipin.cf.bmp->hdr->yIsDown | |
| 239 |
(skipin.cf.bmp->hdr->bpp != 8) | |
| 240 |
(skipin.cf.bmp->hdr->width != sskip_dim[0]) | |
| 241 |
(skipin.cf.bmp->hdr->height != sskip_dim[1])) { |
| 242 |
sprintf(errmsg, "bad type/size/orientation for '%s'", |
| 243 |
skipin.cfname); |
| 244 |
error(USER, errmsg); |
| 245 |
} |
| 246 |
break; |
| 247 |
case CFnone: |
| 248 |
sprintf(errmsg, "unsupported image type for '%s'", skipin.cfname); |
| 249 |
error(USER, errmsg); |
| 250 |
} |
| 251 |
return(bmcnt); /* ready to roll */ |
| 252 |
} |
| 253 |
|
| 254 |
/* private function to convert 8-bit to float correction multiplier */ |
| 255 |
static void |
| 256 |
srcskip_cvtY8(float *scorr, const uby8 *y8, int n) |
| 257 |
{ |
| 258 |
static float gamtab[256]; |
| 259 |
|
| 260 |
if (gamtab[0] < 0.5f) { /* initialize lookup */ |
| 261 |
int i = 256; |
| 262 |
while (i--) |
| 263 |
gamtab[i] = 1./(1. - pow((i+.5)*(1./255.), 2.2)); |
| 264 |
} |
| 265 |
while (n-- > 0) |
| 266 |
*scorr++ = gamtab[*y8++]; |
| 267 |
} |
| 268 |
|
| 269 |
/* Read and convert the specified source skip scanline */ |
| 270 |
int |
| 271 |
srcskip_getrow(int row, int *sndx, float *scorr) |
| 272 |
{ |
| 273 |
int err; |
| 274 |
|
| 275 |
if ((0 > row) | (row >= sskip_dim[1])) |
| 276 |
goto badargum; |
| 277 |
if (sndx != NULL) { /* read bitmap flags & convert? */ |
| 278 |
uby8 *scanflags; |
| 279 |
SKIPBMP *sbmp; |
| 280 |
int x; |
| 281 |
if (skipin.sbmplist == NULL) |
| 282 |
goto inpclosed; |
| 283 |
errno = 0; |
| 284 |
for (sbmp = skipin.sbmplist; sbmp != NULL; sbmp = sbmp->next) |
| 285 |
if ((err = BMPseekScanline(row, sbmp->bmp)) != BIR_OK) { |
| 286 |
sprintf(errmsg, "%s '%s'", |
| 287 |
BMPerrorMessage(err), sbmp->bname); |
| 288 |
error(SYSTEM, errmsg); |
| 289 |
} |
| 290 |
/* per-column source skip flags */ |
| 291 |
scanflags = (uby8 *)ecalloc(sskip_dim[0], SSKIPFLSIZ); |
| 292 |
for (sbmp = skipin.sbmplist; sbmp != NULL; sbmp = sbmp->next) { |
| 293 |
const uby8 *bscn = sbmp->bmp->scanline; |
| 294 |
for (x = 0; x < sskip_dim[0]; bscn += !(++x & 7)) |
| 295 |
if (!(*bscn & 0x80>>(x&7))) |
| 296 |
sskip_addflags(scanflags + x*SSKIPFLSIZ, |
| 297 |
sbmp->sfl); |
| 298 |
} |
| 299 |
/* convert to lookup indices */ |
| 300 |
for (x = sskip_dim[0]; x-- > 0; ) |
| 301 |
sndx[x] = sskip_rsi(scanflags + x*SSKIPFLSIZ); |
| 302 |
efree(scanflags); |
| 303 |
} |
| 304 |
if (scorr == NULL) /* all done? */ |
| 305 |
return(row); |
| 306 |
switch (skipin.cftype) { /* else read correction row */ |
| 307 |
case CFfloatY: |
| 308 |
if (skipin.cf.Y.fd < 0) |
| 309 |
goto inpclosed; |
| 310 |
if (pread(skipin.cf.Y.fd, scorr, sizeof(float)*sskip_dim[0], |
| 311 |
skipin.cf.Y.dstart + sizeof(float)*sskip_dim[0]*row) |
| 312 |
!= sizeof(float)*sskip_dim[0]) { |
| 313 |
sprintf(errmsg, "read error from '%s'", skipin.cfname); |
| 314 |
error(SYSTEM, errmsg); |
| 315 |
} |
| 316 |
return(row); |
| 317 |
case CFbmpY8: |
| 318 |
if (skipin.cf.bmp == NULL) |
| 319 |
goto inpclosed; |
| 320 |
err = BMPseekScanline(row, skipin.cf.bmp); |
| 321 |
if (err != BIR_OK) { |
| 322 |
sprintf(errmsg, "%s '%s'", |
| 323 |
BMPerrorMessage(err), skipin.cfname); |
| 324 |
error(SYSTEM, errmsg); |
| 325 |
} |
| 326 |
srcskip_cvtY8(scorr, skipin.cf.bmp->scanline, sskip_dim[0]); |
| 327 |
return(row); |
| 328 |
case CFnone: /* caller asking for missing input */ |
| 329 |
break; |
| 330 |
} |
| 331 |
inpclosed: |
| 332 |
error(CONSISTENCY, "call to srcskip_getrow() on closed input"); |
| 333 |
return(EOF); |
| 334 |
badargum: |
| 335 |
error(CONSISTENCY, "bad argument in srcskip_readrow()"); |
| 336 |
return(EOF); /* pro forma */ |
| 337 |
} |
| 338 |
|
| 339 |
/* Close input images and free memory (leaving any maps) */ |
| 340 |
void |
| 341 |
srcskip_close() |
| 342 |
{ |
| 343 |
while (skipin.sbmplist != NULL) { |
| 344 |
SKIPBMP *sbmp = skipin.sbmplist; |
| 345 |
skipin.sbmplist = sbmp->next; |
| 346 |
BMPcloseInput(sbmp->bmp); |
| 347 |
sskip_free(sbmp->sfl); |
| 348 |
efree(sbmp); |
| 349 |
} |
| 350 |
switch (skipin.cftype) { |
| 351 |
case CFfloatY: |
| 352 |
if (skipin.cf.Y.fd >= 0) { |
| 353 |
close(skipin.cf.Y.fd); |
| 354 |
skipin.cf.Y.fd = -1; |
| 355 |
} |
| 356 |
break; |
| 357 |
case CFbmpY8: |
| 358 |
if (skipin.cf.bmp != NULL) { |
| 359 |
BMPcloseInput(skipin.cf.bmp); |
| 360 |
skipin.cf.bmp = NULL; |
| 361 |
} |
| 362 |
break; |
| 363 |
} |
| 364 |
skipin.cfname[0] = '\0'; |
| 365 |
if (ssf_select == NULL) { /* freed lookup table already? */ |
| 366 |
srcskip_free_maps(); |
| 367 |
skipin.cftype = CFnone; |
| 368 |
sskip_dim[0] = sskip_dim[1] = 0; |
| 369 |
} |
| 370 |
} |
| 371 |
|
| 372 |
#if defined(_WIN32) || defined(_WIN64) |
| 373 |
|
| 374 |
/* Allocate and load entire source skip index array */ |
| 375 |
int * |
| 376 |
srcskip_ndxmap() |
| 377 |
{ |
| 378 |
int y; |
| 379 |
|
| 380 |
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 381 |
srcskip_free_maps(); |
| 382 |
return(NULL); |
| 383 |
} |
| 384 |
if (skipin.ndxmap != NULL) |
| 385 |
return(skipin.ndxmap); |
| 386 |
|
| 387 |
skipin.ndxmap = (int *)emalloc(sizeof(int) * |
| 388 |
sskip_dim[0]*sskip_dim[1]); |
| 389 |
|
| 390 |
for (y = 0; y < sskip_dim[1]; y++) |
| 391 |
srcskip_getrow(y, skipin.ndxmap + sskip_dim[0]*y, NULL); |
| 392 |
|
| 393 |
return(skipin.ndxmap); |
| 394 |
} |
| 395 |
|
| 396 |
/* Allocate and load entire source correction array */ |
| 397 |
float * |
| 398 |
srcskip_corrmap() |
| 399 |
{ |
| 400 |
int y; |
| 401 |
ssize_t nbytes; |
| 402 |
|
| 403 |
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 404 |
srcskip_free_maps(); |
| 405 |
return(NULL); |
| 406 |
} |
| 407 |
if (skipin.corrmap != NULL) |
| 408 |
return(skipin.corrmap); |
| 409 |
|
| 410 |
if (skipin.cftype == CFnone) |
| 411 |
return(NULL); |
| 412 |
|
| 413 |
nbytes = sizeof(float)*sskip_dim[0]*sskip_dim[1]; |
| 414 |
|
| 415 |
skipin.corrmap = (float *)emalloc(nbytes); |
| 416 |
|
| 417 |
switch (skipin.cftype) { |
| 418 |
case CFfloatY: |
| 419 |
if (pread(skipin.cf.Y.fd, skipin.corrmap, nbytes, |
| 420 |
skipin.cf.Y.dstart) != nbytes) { |
| 421 |
sprintf(errmsg, "read error from '%s'", skipin.cfname); |
| 422 |
error(SYSTEM, errmsg); |
| 423 |
} |
| 424 |
break; |
| 425 |
case CFbmpY8: |
| 426 |
for (y = 0; y < sskip_dim[1]; y++) |
| 427 |
srcskip_getrow(y, NULL, skipin.corrmap + sskip_dim[0]*y); |
| 428 |
break; |
| 429 |
} |
| 430 |
skipin.cref = 1; |
| 431 |
return(skipin.corrmap); |
| 432 |
} |
| 433 |
|
| 434 |
/* Free allocated memory for source skip index and correction maps */ |
| 435 |
void |
| 436 |
srcskip_free_maps() |
| 437 |
{ |
| 438 |
efree(skipin.ndxmap); skipin.ndxmap = NULL; |
| 439 |
efree(skipin.corrmap); skipin.corrmap = NULL; |
| 440 |
} |
| 441 |
|
| 442 |
#else /* ! Windows */ |
| 443 |
|
| 444 |
#include <sys/mman.h> /* mmap() support */ |
| 445 |
|
| 446 |
/* Create memory map with entire source skip index array */ |
| 447 |
int * |
| 448 |
srcskip_ndxmap() |
| 449 |
{ |
| 450 |
int y; |
| 451 |
|
| 452 |
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 453 |
srcskip_free_maps(); |
| 454 |
return(NULL); |
| 455 |
} |
| 456 |
if (skipin.ndxmap != NULL) |
| 457 |
return(skipin.ndxmap); |
| 458 |
|
| 459 |
skipin.ndxmap = (int *)mmap(NULL, sizeof(int)*sskip_dim[0]*sskip_dim[1], |
| 460 |
PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); |
| 461 |
|
| 462 |
if ((void *)skipin.ndxmap == MAP_FAILED) |
| 463 |
error(SYSTEM, "out of memory in srcskip_ndxmap()"); |
| 464 |
|
| 465 |
for (y = 0; y < sskip_dim[1]; y++) |
| 466 |
srcskip_getrow(y, skipin.ndxmap + sskip_dim[0]*y, NULL); |
| 467 |
|
| 468 |
return(skipin.ndxmap); |
| 469 |
} |
| 470 |
|
| 471 |
/* Create memory map with entire source skip correction array */ |
| 472 |
float * |
| 473 |
srcskip_corrmap() |
| 474 |
{ |
| 475 |
int y; |
| 476 |
ssize_t nbytes; |
| 477 |
|
| 478 |
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 479 |
srcskip_free_maps(); |
| 480 |
return(NULL); |
| 481 |
} |
| 482 |
if (skipin.corrmap != NULL) |
| 483 |
return(skipin.corrmap); |
| 484 |
|
| 485 |
if (skipin.cftype == CFnone) |
| 486 |
return(NULL); |
| 487 |
|
| 488 |
nbytes = sizeof(float)*sskip_dim[0]*sskip_dim[1]; |
| 489 |
|
| 490 |
if (skipin.cftype != CFfloatY || skipin.cf.Y.dstart % sizeof(float)) { |
| 491 |
skipin.corrmap = (float *)mmap(NULL, nbytes, |
| 492 |
PROT_READ|PROT_WRITE, |
| 493 |
MAP_ANON|MAP_PRIVATE, -1, 0); |
| 494 |
if ((void *)skipin.corrmap == MAP_FAILED) |
| 495 |
error(SYSTEM, "out of memory in srcskip_corrmap()"); |
| 496 |
} |
| 497 |
switch (skipin.cftype) { |
| 498 |
case CFfloatY: |
| 499 |
if (skipin.corrmap != NULL) { |
| 500 |
if (pread(skipin.cf.Y.fd, skipin.corrmap, nbytes, |
| 501 |
skipin.cf.Y.dstart) != nbytes) { |
| 502 |
sprintf(errmsg, "read error from '%s'", |
| 503 |
skipin.cfname); |
| 504 |
error(SYSTEM, errmsg); |
| 505 |
} |
| 506 |
break; /* best we could do */ |
| 507 |
} /* else map directly to file data */ |
| 508 |
skipin.corrmap = (float *)mmap(NULL, skipin.cf.Y.dstart + nbytes, |
| 509 |
PROT_READ|PROT_WRITE, |
| 510 |
MAP_FILE|MAP_PRIVATE, skipin.cf.Y.fd, 0); |
| 511 |
if ((void *)skipin.corrmap == MAP_FAILED) |
| 512 |
error(SYSTEM, "cannot map file in srcskip_corrmap()"); |
| 513 |
skipin.corrmap += skipin.cf.Y.dstart/sizeof(float); |
| 514 |
break; |
| 515 |
case CFbmpY8: |
| 516 |
for (y = 0; y < sskip_dim[1]; y++) |
| 517 |
srcskip_getrow(y, NULL, skipin.corrmap + sskip_dim[0]*y); |
| 518 |
break; |
| 519 |
} |
| 520 |
return(skipin.corrmap); |
| 521 |
} |
| 522 |
|
| 523 |
/* Unmap memory allocated for source skip index and correction arrays */ |
| 524 |
void |
| 525 |
srcskip_free_maps() |
| 526 |
{ |
| 527 |
if (skipin.ndxmap != NULL) { |
| 528 |
munmap(skipin.ndxmap, sizeof(int)*sskip_dim[0]*sskip_dim[1]); |
| 529 |
skipin.ndxmap = NULL; |
| 530 |
} |
| 531 |
if (skipin.corrmap != NULL) { |
| 532 |
off_t headlen = 0; |
| 533 |
if (skipin.cftype == CFfloatY && |
| 534 |
!(skipin.cf.Y.dstart % sizeof(float))) |
| 535 |
headlen = skipin.cf.Y.dstart; |
| 536 |
|
| 537 |
munmap((char *)skipin.corrmap - headlen, |
| 538 |
headlen + sizeof(float)*sskip_dim[0]*sskip_dim[1]); |
| 539 |
skipin.corrmap = NULL; |
| 540 |
} |
| 541 |
} |
| 542 |
|
| 543 |
#endif /* ! Windows */ |
| 544 |
#endif /* SSKIPOPT */ |
