| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: tmapcolrs.c,v 3.38 2024/09/10 20:24:42 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Routines for tone mapping on Radiance RGBE and XYZE pictures. |
| 6 |
* |
| 7 |
* Externals declared in tonemap.h |
| 8 |
*/ |
| 9 |
|
| 10 |
#include "copyright.h" |
| 11 |
|
| 12 |
#include <stdlib.h> |
| 13 |
#include <math.h> |
| 14 |
|
| 15 |
#ifdef PCOND |
| 16 |
#include "paths.h" |
| 17 |
#endif |
| 18 |
#include "tmprivat.h" |
| 19 |
#include "rtio.h" |
| 20 |
#include "resolu.h" |
| 21 |
|
| 22 |
#define GAMTSZ 4096 |
| 23 |
|
| 24 |
typedef struct { |
| 25 |
uby8 gamb[GAMTSZ]; /* gamma lookup table */ |
| 26 |
int clfb[3]; /* encoded tm->clf */ |
| 27 |
int32 cmatb[3][3]; /* encoded color transform */ |
| 28 |
TMbright inpsfb; /* encoded tm->inpsf */ |
| 29 |
} COLRDATA; |
| 30 |
|
| 31 |
static void * colrInit(TMstruct *); |
| 32 |
static void colrNewSpace(TMstruct *); |
| 33 |
static gethfunc headline; |
| 34 |
|
| 35 |
static struct tmPackage colrPkg = { /* our package functions */ |
| 36 |
colrInit, colrNewSpace, free |
| 37 |
}; |
| 38 |
static int colrReg = -1; /* our package registration number */ |
| 39 |
|
| 40 |
static TMbright logi[256]; |
| 41 |
|
| 42 |
|
| 43 |
int |
| 44 |
tmCvColrs( /* convert RGBE/XYZE colors */ |
| 45 |
TMstruct *tms, |
| 46 |
TMbright *ls, |
| 47 |
uby8 *cs, |
| 48 |
COLR *scan, |
| 49 |
int len |
| 50 |
) |
| 51 |
{ |
| 52 |
static const char funcName[] = "tmCvColrs"; |
| 53 |
int cmon[4]; |
| 54 |
COLRDATA *cd; |
| 55 |
int i, j, bi; |
| 56 |
int32 li, vl; |
| 57 |
|
| 58 |
if (tms == NULL) |
| 59 |
returnErr(TM_E_TMINVAL); |
| 60 |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
| 61 |
returnErr(TM_E_ILLEGAL); |
| 62 |
if (colrReg < 0) { /* build tables if necessary */ |
| 63 |
colrReg = tmRegPkg(&colrPkg); |
| 64 |
if (colrReg < 0) |
| 65 |
returnErr(TM_E_CODERR1); |
| 66 |
for (i = 256; i--; ) |
| 67 |
logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5; |
| 68 |
tmMkMesofact(); |
| 69 |
} |
| 70 |
if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL) |
| 71 |
returnErr(TM_E_NOMEM); |
| 72 |
for (i = len; i--; ) { |
| 73 |
if (tmNeedMatrix(tms)) { /* apply color xform */ |
| 74 |
bi = 0; |
| 75 |
for (j = 3; j--; ) { |
| 76 |
vl = cd->cmatb[j][RED]*(int32)scan[i][RED] + |
| 77 |
cd->cmatb[j][GRN]*(int32)scan[i][GRN] + |
| 78 |
cd->cmatb[j][BLU]*(int32)scan[i][BLU] ; |
| 79 |
if (vl < 0) |
| 80 |
cmon[j] = vl/(int32)0x10000; |
| 81 |
else if ((cmon[j] = vl>>16) > bi) |
| 82 |
bi = cmon[j]; |
| 83 |
} |
| 84 |
cmon[EXP] = scan[i][EXP]; |
| 85 |
while (bi >= 256) { /* handle overflow */ |
| 86 |
cmon[EXP]++; |
| 87 |
for (j = 3; j--; ) cmon[j] >>= 1; |
| 88 |
bi >>= 1; |
| 89 |
} |
| 90 |
} else |
| 91 |
copycolr(cmon, scan[i]); |
| 92 |
/* world luminance */ |
| 93 |
li = cd->clfb[RED]*(int32)cmon[RED] + |
| 94 |
cd->clfb[GRN]*(int32)cmon[GRN] + |
| 95 |
cd->clfb[BLU]*(int32)cmon[BLU] ; |
| 96 |
if (li >= 1L<<(12+8)) li = 255; |
| 97 |
else li >>= 12; |
| 98 |
bi = BRT2SCALE(cmon[EXP]-COLXS) + cd->inpsfb; |
| 99 |
if (li > 0) |
| 100 |
bi += logi[li]; |
| 101 |
else { |
| 102 |
bi += logi[0]; |
| 103 |
li = 1; /* avoid /0 */ |
| 104 |
} |
| 105 |
ls[i] = bi; |
| 106 |
if (cs == TM_NOCHROM) /* no color? */ |
| 107 |
continue; |
| 108 |
/* mesopic adj. */ |
| 109 |
if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
| 110 |
int pf, sli = normscot(cmon); |
| 111 |
if (bi < BMESLOWER) { |
| 112 |
cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
| 113 |
} else { |
| 114 |
if (tms->flags & TM_F_BW) |
| 115 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
| 116 |
pf = tmMesofact[bi-BMESLOWER]; |
| 117 |
sli *= 256 - pf; |
| 118 |
for (j = 3; j--; ) { |
| 119 |
cmon[j] = sli + pf*cmon[j]; |
| 120 |
if (cmon[j] <= 0) cmon[j] = 0; |
| 121 |
else cmon[j] >>= 8; |
| 122 |
} |
| 123 |
} |
| 124 |
} else if (tms->flags & TM_F_BW) { |
| 125 |
for (j = 3; j--; ) |
| 126 |
cs[3*i+j] = tms->cdiv[j]/(TM_BRES>>8); |
| 127 |
continue; |
| 128 |
} else { |
| 129 |
for (j = 3; j--; ) |
| 130 |
cmon[j] *= (cmon[j] > 0); |
| 131 |
} |
| 132 |
bi = ( (uint32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 12; |
| 133 |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 134 |
bi = ( (uint32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 12; |
| 135 |
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 136 |
bi = ( (uint32)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 12; |
| 137 |
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 138 |
} |
| 139 |
returnOK; |
| 140 |
} |
| 141 |
|
| 142 |
|
| 143 |
#define FMTRGB 1 /* Input is RGBE */ |
| 144 |
#define FMTCIE 2 /* Input is CIE XYZE */ |
| 145 |
#define FMTSPEC 3 /* Input is N-component spectral data */ |
| 146 |
#define FMTUNK 0 /* Input format is unspecified */ |
| 147 |
#define FMTBAD (-1) /* Input is not a recognized format */ |
| 148 |
|
| 149 |
static struct radhead { |
| 150 |
int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */ |
| 151 |
double expos; /* input exposure value */ |
| 152 |
RGBPRIMP primp; /* input primaries */ |
| 153 |
RGBPRIMS mypri; /* custom primaries */ |
| 154 |
int ncs; /* number of color samples */ |
| 155 |
float wpt[4]; /* spectral partition */ |
| 156 |
} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS, 3, {0,0,0,0}}; |
| 157 |
|
| 158 |
|
| 159 |
static int |
| 160 |
headline( /* grok a header line */ |
| 161 |
char *s, |
| 162 |
void *vrh |
| 163 |
) |
| 164 |
{ |
| 165 |
char fmt[MAXFMTLEN]; |
| 166 |
struct radhead *rh = vrh; |
| 167 |
|
| 168 |
if (formatval(fmt, s)) { |
| 169 |
if (!strcmp(fmt, COLRFMT)) |
| 170 |
rh->format = FMTRGB; |
| 171 |
else if (!strcmp(fmt, CIEFMT)) |
| 172 |
rh->format = FMTCIE; |
| 173 |
else if (!strcmp(fmt, SPECFMT)) |
| 174 |
rh->format = FMTSPEC; |
| 175 |
else |
| 176 |
rh->format = FMTBAD; |
| 177 |
return(0); |
| 178 |
} |
| 179 |
if (isexpos(s)) { |
| 180 |
rh->expos *= exposval(s); |
| 181 |
return(0); |
| 182 |
} |
| 183 |
if (isprims(s)) { |
| 184 |
primsval(rh->mypri, s); |
| 185 |
rh->primp = rh->mypri; |
| 186 |
return(0); |
| 187 |
} |
| 188 |
if (isncomp(s)) { |
| 189 |
rh->ncs = ncompval(s); |
| 190 |
return(0); |
| 191 |
} |
| 192 |
if (iswlsplit(s)) { |
| 193 |
wlsplitval(rh->wpt, s); |
| 194 |
return(0); |
| 195 |
} |
| 196 |
return(0); |
| 197 |
} |
| 198 |
|
| 199 |
|
| 200 |
int |
| 201 |
tmLoadPicture( /* convert Radiance picture */ |
| 202 |
TMstruct *tms, |
| 203 |
TMbright **lpp, |
| 204 |
uby8 **cpp, |
| 205 |
int *xp, |
| 206 |
int *yp, |
| 207 |
char *fname, |
| 208 |
FILE *fp |
| 209 |
) |
| 210 |
{ |
| 211 |
char *funcName = fname==NULL ? "tmLoadPicture" : fname; |
| 212 |
FILE *inpf; |
| 213 |
struct radhead info; |
| 214 |
int err; |
| 215 |
COLR *scanin = NULL; |
| 216 |
int i; |
| 217 |
/* check arguments */ |
| 218 |
if (tms == NULL) |
| 219 |
returnErr(TM_E_TMINVAL); |
| 220 |
if ((lpp == NULL) | (xp == NULL) | (yp == NULL) | |
| 221 |
((fname == NULL) & (fp == TM_GETFILE))) |
| 222 |
returnErr(TM_E_ILLEGAL); |
| 223 |
*xp = *yp = 0; /* error precaution */ |
| 224 |
if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "rb")) == NULL) |
| 225 |
returnErr(TM_E_BADFILE); |
| 226 |
*lpp = NULL; |
| 227 |
if (cpp != TM_NOCHROMP) *cpp = NULL; |
| 228 |
info = rhdefault; /* get our header */ |
| 229 |
getheader(inpf, headline, &info); |
| 230 |
if ((info.format == FMTBAD) | (info.expos <= 0.) || |
| 231 |
fgetresolu(xp, yp, inpf) < 0) { |
| 232 |
err = TM_E_BADFILE; goto done; |
| 233 |
} |
| 234 |
if (info.format == FMTSPEC) { /* valid spectrum? */ |
| 235 |
if (info.ncs <= 3) { |
| 236 |
err = TM_E_BADFILE; goto done; |
| 237 |
} |
| 238 |
if (info.wpt[0] == 0) |
| 239 |
memcpy(info.wpt, WLPART, sizeof(info.wpt)); |
| 240 |
} else if (info.format == FMTUNK) /* assume RGBE format? */ |
| 241 |
info.format = FMTRGB; |
| 242 |
|
| 243 |
if (info.format == FMTCIE) |
| 244 |
info.primp = TM_XYZPRIM; |
| 245 |
else |
| 246 |
info.expos /= WHTEFFICACY; |
| 247 |
/* prepare library */ |
| 248 |
if ((err = tmSetSpace(tms, info.primp, 1./info.expos)) != TM_E_OK) |
| 249 |
goto done; |
| 250 |
err = TM_E_NOMEM; /* allocate arrays */ |
| 251 |
*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp); |
| 252 |
if (*lpp == NULL) |
| 253 |
goto done; |
| 254 |
if (cpp != TM_NOCHROMP) { |
| 255 |
*cpp = (uby8 *)malloc(3*sizeof(uby8) * *xp * *yp); |
| 256 |
if (*cpp == NULL) |
| 257 |
goto done; |
| 258 |
} |
| 259 |
scanin = (COLR *)malloc(sizeof(COLR) * *xp); |
| 260 |
if (scanin == NULL) |
| 261 |
goto done; |
| 262 |
err = TM_E_BADFILE; /* read & convert scanlines */ |
| 263 |
for (i = 0; i < *yp; i++) { |
| 264 |
if (fread2colrs(scanin, *xp, inpf, info.ncs, info.wpt) < 0) { |
| 265 |
err = TM_E_BADFILE; break; |
| 266 |
} |
| 267 |
err = tmCvColrs(tms, *lpp + (i * *xp), |
| 268 |
cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp), |
| 269 |
scanin, *xp); |
| 270 |
if (err != TM_E_OK) |
| 271 |
break; |
| 272 |
} |
| 273 |
done: /* clean up */ |
| 274 |
if (fp == NULL) |
| 275 |
fclose(inpf); |
| 276 |
if (scanin != NULL) |
| 277 |
free(scanin); |
| 278 |
if (err != TM_E_OK) { |
| 279 |
if (*lpp != NULL) |
| 280 |
free(*lpp); |
| 281 |
if (cpp != TM_NOCHROMP && *cpp != NULL) |
| 282 |
free(*cpp); |
| 283 |
returnErr(err); |
| 284 |
} |
| 285 |
returnOK; |
| 286 |
} |
| 287 |
|
| 288 |
|
| 289 |
#ifdef PCOND |
| 290 |
static int /* run pcond to map picture */ |
| 291 |
dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname) |
| 292 |
uby8 **psp; |
| 293 |
int *xp, *yp; |
| 294 |
int flags; |
| 295 |
RGBPRIMP monpri; |
| 296 |
double gamval, Lddyn, Ldmax; |
| 297 |
char *fname; |
| 298 |
{ |
| 299 |
char *funcName = fname; |
| 300 |
TMstruct *tms = NULL; |
| 301 |
char cmdbuf[1024]; |
| 302 |
FILE *infp; |
| 303 |
COLR *scan; |
| 304 |
uby8 *rp; |
| 305 |
int y; |
| 306 |
int x; |
| 307 |
/* set up gamma correction */ |
| 308 |
if (setcolrcor(pow, 1./gamval) < 0) |
| 309 |
returnErr(TM_E_NOMEM); |
| 310 |
/* create command */ |
| 311 |
strcpy(cmdbuf, PCOND); |
| 312 |
if (flags & TM_F_HCONTR) |
| 313 |
strcat(cmdbuf, " -s"); |
| 314 |
if (flags & TM_F_MESOPIC) |
| 315 |
strcat(cmdbuf, " -c"); |
| 316 |
if (flags & TM_F_LINEAR) |
| 317 |
strcat(cmdbuf, " -l"); |
| 318 |
if (flags & TM_F_ACUITY) |
| 319 |
strcat(cmdbuf, " -a"); |
| 320 |
if (flags & TM_F_VEIL) |
| 321 |
strcat(cmdbuf, " -v"); |
| 322 |
if (flags & TM_F_CWEIGHT) |
| 323 |
strcat(cmdbuf, " -w"); |
| 324 |
if (monpri != stdprims) |
| 325 |
sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f", |
| 326 |
monpri[RED][CIEX], monpri[RED][CIEY], |
| 327 |
monpri[GRN][CIEX], monpri[GRN][CIEY], |
| 328 |
monpri[BLU][CIEX], monpri[BLU][CIEY], |
| 329 |
monpri[WHT][CIEX], monpri[WHT][CIEY]); |
| 330 |
sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname); |
| 331 |
/* start pcond */ |
| 332 |
if ((infp = popen(cmdbuf, "r")) == NULL) |
| 333 |
returnErr(TM_E_BADFILE); |
| 334 |
/* check picture format and size */ |
| 335 |
if (checkheader(infp, COLRFMT, NULL) < 0 || |
| 336 |
fgetresolu(xp, yp, infp) < 0) { |
| 337 |
pclose(infp); |
| 338 |
returnErr(TM_E_BADFILE); |
| 339 |
} |
| 340 |
/* allocate arrays */ |
| 341 |
scan = (COLR *)malloc(sizeof(COLR) * *xp); |
| 342 |
if (flags & TM_F_BW) |
| 343 |
rp = (uby8 *)malloc(sizeof(uby8) * *xp * *yp); |
| 344 |
else |
| 345 |
rp = (uby8 *)malloc(3*sizeof(uby8) * *xp * *yp); |
| 346 |
if (((*psp = rp) == NULL) | (scan == NULL)) { |
| 347 |
pclose(infp); |
| 348 |
returnErr(TM_E_NOMEM); |
| 349 |
} |
| 350 |
/* read and gamma map file */ |
| 351 |
for (y = 0; y < *yp; y++) { |
| 352 |
if (freadcolrs(scan, *xp, infp) < 0) { |
| 353 |
pclose(infp); |
| 354 |
free(scan); |
| 355 |
free(*psp); |
| 356 |
*psp = NULL; |
| 357 |
returnErr(TM_E_BADFILE); |
| 358 |
} |
| 359 |
colrs_gambs(scan, *xp); |
| 360 |
if (flags & TM_F_BW) |
| 361 |
for (x = 0; x < *xp; x++) |
| 362 |
*rp++ = normbright(scan[x]); |
| 363 |
else |
| 364 |
for (x = 0; x < *xp; x++) { |
| 365 |
*rp++ = scan[x][RED]; |
| 366 |
*rp++ = scan[x][GRN]; |
| 367 |
*rp++ = scan[x][BLU]; |
| 368 |
} |
| 369 |
} |
| 370 |
free(scan); |
| 371 |
pclose(infp); |
| 372 |
returnOK; |
| 373 |
} |
| 374 |
#endif |
| 375 |
|
| 376 |
|
| 377 |
int /* map a Radiance picture */ |
| 378 |
tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp) |
| 379 |
uby8 **psp; |
| 380 |
int *xp, *yp; |
| 381 |
int flags; |
| 382 |
RGBPRIMP monpri; |
| 383 |
double gamval, Lddyn, Ldmax; |
| 384 |
char *fname; |
| 385 |
FILE *fp; |
| 386 |
{ |
| 387 |
char *funcName = fname==NULL ? "tmMapPicture" : fname; |
| 388 |
TMstruct *tms = NULL; |
| 389 |
uby8 *cp; |
| 390 |
TMbright *lp; |
| 391 |
int err; |
| 392 |
/* check arguments */ |
| 393 |
if ((psp == NULL) | (xp == NULL) | (yp == NULL) | (monpri == NULL) | |
| 394 |
((fname == NULL) & (fp == TM_GETFILE))) |
| 395 |
returnErr(TM_E_ILLEGAL); |
| 396 |
/* set defaults */ |
| 397 |
if (gamval < MINGAM) gamval = DEFGAM; |
| 398 |
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN; |
| 399 |
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX; |
| 400 |
if (flags & TM_F_BW) monpri = stdprims; |
| 401 |
#ifdef PCOND |
| 402 |
/* check for pcond run */ |
| 403 |
if (fp == TM_GETFILE && flags & TM_F_UNIMPL) |
| 404 |
return( dopcond(psp, xp, yp, flags, |
| 405 |
monpri, gamval, Lddyn, Ldmax, fname) ); |
| 406 |
#endif |
| 407 |
/* initialize tone mapping */ |
| 408 |
if ((tms = tmInit(flags, monpri, gamval)) == NULL) |
| 409 |
returnErr(TM_E_NOMEM); |
| 410 |
/* load & convert picture */ |
| 411 |
err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp, |
| 412 |
xp, yp, fname, fp); |
| 413 |
if (err != TM_E_OK) { |
| 414 |
tmDone(tms); |
| 415 |
return(err); |
| 416 |
} |
| 417 |
/* allocate space for result */ |
| 418 |
if (flags & TM_F_BW) { |
| 419 |
*psp = (uby8 *)malloc(sizeof(uby8) * *xp * *yp); |
| 420 |
if (*psp == NULL) { |
| 421 |
free(lp); |
| 422 |
tmDone(tms); |
| 423 |
returnErr(TM_E_NOMEM); |
| 424 |
} |
| 425 |
cp = TM_NOCHROM; |
| 426 |
} else |
| 427 |
*psp = cp; |
| 428 |
/* compute color mapping */ |
| 429 |
err = tmAddHisto(tms, lp, *xp * *yp, 1); |
| 430 |
if (err != TM_E_OK) |
| 431 |
goto done; |
| 432 |
err = tmComputeMapping(tms, gamval, Lddyn, Ldmax); |
| 433 |
if (err != TM_E_OK) |
| 434 |
goto done; |
| 435 |
/* map colors */ |
| 436 |
err = tmMapPixels(tms, *psp, lp, cp, *xp * *yp); |
| 437 |
|
| 438 |
done: /* clean up */ |
| 439 |
free(lp); |
| 440 |
tmDone(tms); |
| 441 |
if (err != TM_E_OK) { /* free memory on error */ |
| 442 |
free(*psp); |
| 443 |
*psp = NULL; |
| 444 |
returnErr(err); |
| 445 |
} |
| 446 |
returnOK; |
| 447 |
} |
| 448 |
|
| 449 |
|
| 450 |
static void |
| 451 |
colrNewSpace(tms) /* color space changed for tone mapping */ |
| 452 |
TMstruct *tms; |
| 453 |
{ |
| 454 |
COLRDATA *cd; |
| 455 |
double d; |
| 456 |
int i, j; |
| 457 |
|
| 458 |
cd = (COLRDATA *)tms->pd[colrReg]; |
| 459 |
for (i = 3; i--; ) |
| 460 |
cd->clfb[i] = 0x1000*tms->clf[i] + .5; |
| 461 |
cd->inpsfb = tmCvLuminance(tms->inpsf); |
| 462 |
for (i = 3; i--; ) |
| 463 |
for (j = 3; j--; ) { |
| 464 |
d = tms->cmat[i][j] / tms->inpsf; |
| 465 |
cd->cmatb[i][j] = 0x10000*d + (d<0. ? -.5 : .5); |
| 466 |
} |
| 467 |
} |
| 468 |
|
| 469 |
|
| 470 |
static void * |
| 471 |
colrInit(tms) /* initialize private data for tone mapping */ |
| 472 |
TMstruct *tms; |
| 473 |
{ |
| 474 |
COLRDATA *cd; |
| 475 |
int i; |
| 476 |
/* allocate our data */ |
| 477 |
cd = (COLRDATA *)malloc(sizeof(COLRDATA)); |
| 478 |
if (cd == NULL) |
| 479 |
return(NULL); |
| 480 |
tms->pd[colrReg] = (void *)cd; |
| 481 |
/* compute gamma table */ |
| 482 |
for (i = GAMTSZ; i--; ) |
| 483 |
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam); |
| 484 |
/* compute color and scale factors */ |
| 485 |
colrNewSpace(tms); |
| 486 |
return((void *)cd); |
| 487 |
} |
