| 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 */
|
