| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Routines for tone mapping on Radiance RGBE and XYZE pictures. |
| 9 |
* See tonemap.h for detailed function descriptions. |
| 10 |
*/ |
| 11 |
|
| 12 |
#include <stdio.h> |
| 13 |
#include <math.h> |
| 14 |
#include "tmprivat.h" |
| 15 |
#include "resolu.h" |
| 16 |
|
| 17 |
|
| 18 |
extern char *tempbuffer(); |
| 19 |
|
| 20 |
#define GAMTSZ 1024 |
| 21 |
|
| 22 |
typedef struct { |
| 23 |
BYTE gamb[GAMTSZ]; /* gamma lookup table */ |
| 24 |
COLR clfb; /* encoded tm->clf */ |
| 25 |
TMbright inpsfb; /* encoded tm->inpsf */ |
| 26 |
} COLRDATA; |
| 27 |
|
| 28 |
static MEM_PTR colrInit(); |
| 29 |
static void colrNewSpace(); |
| 30 |
extern void free(); |
| 31 |
static struct tmPackage colrPkg = { /* our package functions */ |
| 32 |
colrInit, colrNewSpace, free |
| 33 |
}; |
| 34 |
static int colrReg = -1; /* our package registration number */ |
| 35 |
|
| 36 |
#define LOGISZ 260 |
| 37 |
static TMbright logi[LOGISZ]; |
| 38 |
static BYTE photofact[BMESUPPER-BMESLOWER]; |
| 39 |
|
| 40 |
|
| 41 |
int |
| 42 |
tmCvColrs(ls, cs, scan, len) /* tone map RGBE/XYZE colors */ |
| 43 |
TMbright *ls; |
| 44 |
BYTE *cs; |
| 45 |
COLR *scan; |
| 46 |
int len; |
| 47 |
{ |
| 48 |
static char funcName[] = "tmCvColrs"; |
| 49 |
COLR cmon; |
| 50 |
register COLRDATA *cd; |
| 51 |
register int i, bi, li; |
| 52 |
|
| 53 |
if (tmTop == NULL) |
| 54 |
returnErr(TM_E_TMINVAL); |
| 55 |
if (ls == NULL | scan == NULL | len < 0) |
| 56 |
returnErr(TM_E_ILLEGAL); |
| 57 |
if (tmNeedMatrix(tmTop)) { /* need floating point */ |
| 58 |
register COLOR *newscan; |
| 59 |
newscan = (COLOR *)tempbuffer(len*sizeof(COLOR)); |
| 60 |
if (newscan == NULL) |
| 61 |
returnErr(TM_E_NOMEM); |
| 62 |
for (i = len; i--; ) |
| 63 |
colr_color(newscan[i], scan[i]); |
| 64 |
return(tmCvColors(ls, cs, newscan, len)); |
| 65 |
} |
| 66 |
if (colrReg == -1) { /* build tables if necessary */ |
| 67 |
colrReg = tmRegPkg(&colrPkg); |
| 68 |
if (colrReg < 0) |
| 69 |
returnErr(TM_E_CODERR1); |
| 70 |
for (i = 256; i--; ) |
| 71 |
logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5; |
| 72 |
for (i = 256; i < LOGISZ; i++) |
| 73 |
logi[i] = logi[255]; |
| 74 |
for (i = BMESLOWER; i < BMESUPPER; i++) |
| 75 |
photofact[i-BMESLOWER] = 256. * |
| 76 |
(tmLuminance(i) - LMESLOWER) / |
| 77 |
(LMESUPPER - LMESLOWER); |
| 78 |
} |
| 79 |
if ((cd = (COLRDATA *)tmPkgData(tmTop,colrReg)) == NULL) |
| 80 |
returnErr(TM_E_NOMEM); |
| 81 |
for (i = len; i--; ) { |
| 82 |
copycolr(cmon, scan[i]); |
| 83 |
/* world luminance */ |
| 84 |
li = ( cd->clfb[RED]*cmon[RED] + |
| 85 |
cd->clfb[GRN]*cmon[GRN] + |
| 86 |
cd->clfb[BLU]*cmon[BLU] ) >> 8; |
| 87 |
bi = BRT2SCALE*(cmon[EXP]-COLXS) + |
| 88 |
logi[li] + cd->inpsfb; |
| 89 |
if (bi < MINBRT) { |
| 90 |
bi = MINBRT-1; /* bogus value */ |
| 91 |
li++; /* avoid li==0 */ |
| 92 |
} |
| 93 |
ls[i] = bi; |
| 94 |
if (cs == TM_NOCHROM) /* no color? */ |
| 95 |
continue; |
| 96 |
if (tmTop->flags & TM_F_BW) |
| 97 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
| 98 |
/* mesopic adj. */ |
| 99 |
if (tmTop->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
| 100 |
register int pf, sli = normscot(cmon); |
| 101 |
if (bi < BMESLOWER) |
| 102 |
cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
| 103 |
else { |
| 104 |
pf = photofact[bi-BMESLOWER]; |
| 105 |
sli *= 256 - pf; |
| 106 |
cmon[RED] = ( sli + pf*cmon[RED] ) >> 8; |
| 107 |
cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8; |
| 108 |
cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8; |
| 109 |
} |
| 110 |
} |
| 111 |
bi = ( (int4)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8; |
| 112 |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 113 |
bi = ( (int4)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8; |
| 114 |
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 115 |
bi = ( (int4)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 8; |
| 116 |
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 117 |
} |
| 118 |
returnOK; |
| 119 |
} |
| 120 |
|
| 121 |
|
| 122 |
#define FMTRGB 1 /* Input is RGBE */ |
| 123 |
#define FMTCIE 2 /* Input is CIE XYZE */ |
| 124 |
#define FMTUNK 3 /* Input format is unspecified */ |
| 125 |
#define FMTBAD 4 /* Input is not a recognized format */ |
| 126 |
|
| 127 |
static struct radhead { |
| 128 |
int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */ |
| 129 |
double expos; /* input exposure value */ |
| 130 |
RGBPRIMP primp; /* input primaries */ |
| 131 |
RGBPRIMS mypri; /* custom primaries */ |
| 132 |
} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS}; |
| 133 |
|
| 134 |
|
| 135 |
static int |
| 136 |
headline(s, rh) /* grok a header line */ |
| 137 |
register char *s; |
| 138 |
register struct radhead *rh; |
| 139 |
{ |
| 140 |
char fmt[32]; |
| 141 |
|
| 142 |
if (formatval(fmt, s)) { |
| 143 |
if (!strcmp(fmt, COLRFMT)) |
| 144 |
rh->format = FMTRGB; |
| 145 |
else if (!strcmp(fmt, CIEFMT)) |
| 146 |
rh->format = FMTCIE; |
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else |
| 148 |
rh->format = FMTBAD; |
| 149 |
return; |
| 150 |
} |
| 151 |
if (isexpos(s)) { |
| 152 |
rh->expos *= exposval(s); |
| 153 |
return; |
| 154 |
} |
| 155 |
if (isprims(s)) { |
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primsval(rh->mypri, s); |
| 157 |
rh->primp = rh->mypri; |
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return; |
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} |
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} |
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|
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|
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int |
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tmLoadPicture(lpp, cpp, xp, yp, fname, fp) /* convert Radiance picture */ |
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TMbright **lpp; |
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BYTE **cpp; |
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int *xp, *yp; |
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char *fname; |
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FILE *fp; |
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{ |
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char *funcName = fname==NULL ? "tmLoadPicture" : fname; |
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FILE *inpf; |
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struct radhead info; |
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int err; |
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COLR *scanin = NULL; |
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int i; |
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/* check arguments */ |
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if (tmTop == NULL) |
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returnErr(TM_E_TMINVAL); |
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if (lpp == NULL | xp == NULL | yp == NULL | |
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(fname == NULL & fp == TM_GETFILE)) |
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returnErr(TM_E_ILLEGAL); |
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*xp = *yp = 0; /* error precaution */ |
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if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "r")) == NULL) |
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returnErr(TM_E_BADFILE); |
| 186 |
info = rhdefault; /* get our header */ |
| 187 |
getheader(inpf, headline, (char *)&info); |
| 188 |
if (info.format == FMTBAD | info.expos <= 0. || |
| 189 |
fgetresolu(xp, yp, inpf) < 0) { |
| 190 |
err = TM_E_BADFILE; goto done; |
| 191 |
} |
| 192 |
if (info.format == FMTUNK) /* assume RGBE format */ |
| 193 |
info.format = FMTRGB; |
| 194 |
if (info.format == FMTRGB) |
| 195 |
info.expos /= WHTEFFICACY; |
| 196 |
else if (info.format == FMTCIE) |
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info.primp = TM_XYZPRIM; |
| 198 |
/* prepare library */ |
| 199 |
if ((err = tmSetSpace(info.primp, 1./info.expos)) != TM_E_OK) |
| 200 |
goto done; |
| 201 |
err = TM_E_NOMEM; /* allocate arrays */ |
| 202 |
*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp); |
| 203 |
if (*lpp == NULL) |
| 204 |
goto done; |
| 205 |
if (cpp != TM_NOCHROMP) { |
| 206 |
*cpp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
| 207 |
if (*cpp == NULL) |
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goto done; |
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} |
| 210 |
scanin = (COLR *)malloc(sizeof(COLR) * *xp); |
| 211 |
if (scanin == NULL) |
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goto done; |
| 213 |
err = TM_E_BADFILE; /* read & convert scanlines */ |
| 214 |
for (i = 0; i < *yp; i++) { |
| 215 |
if (freadcolrs(scanin, *xp, inpf) < 0) { |
| 216 |
err = TM_E_BADFILE; break; |
| 217 |
} |
| 218 |
err = tmCvColrs(*lpp + (i * *xp), |
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cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp), |
| 220 |
scanin, *xp); |
| 221 |
if (err != TM_E_OK) |
| 222 |
break; |
| 223 |
} |
| 224 |
done: /* clean up */ |
| 225 |
if (fp == NULL) |
| 226 |
fclose(inpf); |
| 227 |
if (scanin != NULL) |
| 228 |
free((char *)scanin); |
| 229 |
if (err != TM_E_OK) |
| 230 |
returnErr(err); |
| 231 |
returnOK; |
| 232 |
} |
| 233 |
|
| 234 |
|
| 235 |
int /* run pcond to map picture */ |
| 236 |
dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname) |
| 237 |
BYTE **psp; |
| 238 |
int *xp, *yp; |
| 239 |
int flags; |
| 240 |
RGBPRIMP monpri; |
| 241 |
double gamval, Lddyn, Ldmax; |
| 242 |
char *fname; |
| 243 |
{ |
| 244 |
char *funcName = fname; |
| 245 |
char cmdbuf[512]; |
| 246 |
FILE *infp; |
| 247 |
register COLR *scan; |
| 248 |
register BYTE *rp; |
| 249 |
int y; |
| 250 |
register int x; |
| 251 |
/* set up gamma correction */ |
| 252 |
if (setcolrcor(pow, 1./gamval) < 0) |
| 253 |
returnErr(TM_E_NOMEM); |
| 254 |
/* create command */ |
| 255 |
strcpy(cmdbuf, "pcond "); |
| 256 |
if (flags & TM_F_HCONTR) |
| 257 |
strcat(cmdbuf, "-s "); |
| 258 |
if (flags & TM_F_MESOPIC) |
| 259 |
strcat(cmdbuf, "-c "); |
| 260 |
if (flags & TM_F_LINEAR) |
| 261 |
strcat(cmdbuf, "-l "); |
| 262 |
if (flags & TM_F_ACUITY) |
| 263 |
strcat(cmdbuf, "-a "); |
| 264 |
if (flags & TM_F_VEIL) |
| 265 |
strcat(cmdbuf, "-v "); |
| 266 |
if (flags & TM_F_CWEIGHT) |
| 267 |
strcat(cmdbuf, "-w "); |
| 268 |
sprintf(cmdbuf+strlen(cmdbuf), |
| 269 |
"-p %f %f %f %f %f %f %f %f -d %f -u %f %s", |
| 270 |
monpri[RED][CIEX], monpri[RED][CIEY], |
| 271 |
monpri[GRN][CIEX], monpri[GRN][CIEY], |
| 272 |
monpri[BLU][CIEX], monpri[BLU][CIEY], |
| 273 |
monpri[WHT][CIEX], monpri[WHT][CIEY], |
| 274 |
Lddyn, Ldmax, fname); |
| 275 |
/* start pcond */ |
| 276 |
if ((infp = popen(cmdbuf, "r")) == NULL) |
| 277 |
returnErr(TM_E_BADFILE); |
| 278 |
/* check picture format and size */ |
| 279 |
if (checkheader(infp, COLRFMT, NULL) < 0 || |
| 280 |
fgetresolu(xp, yp, infp) < 0) { |
| 281 |
pclose(infp); |
| 282 |
returnErr(TM_E_BADFILE); |
| 283 |
} |
| 284 |
/* allocate arrays */ |
| 285 |
scan = (COLR *)malloc(sizeof(COLR) * *xp); |
| 286 |
if (flags & TM_F_BW) |
| 287 |
rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
| 288 |
else |
| 289 |
rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
| 290 |
if ((*psp = rp) == NULL | scan == NULL) { |
| 291 |
pclose(infp); |
| 292 |
returnErr(TM_E_NOMEM); |
| 293 |
} |
| 294 |
/* read and gamma map file */ |
| 295 |
for (y = 0; y < *yp; y++) { |
| 296 |
if (freadcolrs(scan, *xp, infp) < 0) { |
| 297 |
pclose(infp); |
| 298 |
free((char *)scan); |
| 299 |
free((char *)*psp); |
| 300 |
*psp = NULL; |
| 301 |
returnErr(TM_E_BADFILE); |
| 302 |
} |
| 303 |
colrs_gambs(scan, *xp); |
| 304 |
if (flags & TM_F_BW) |
| 305 |
for (x = 0; x < *xp; x++) |
| 306 |
*rp++ = normbright(scan[x]); |
| 307 |
else |
| 308 |
for (x = 0; x < *xp; x++) { |
| 309 |
*rp++ = scan[x][RED]; |
| 310 |
*rp++ = scan[x][GRN]; |
| 311 |
*rp++ = scan[x][BLU]; |
| 312 |
} |
| 313 |
} |
| 314 |
free((char *)scan); |
| 315 |
pclose(infp); |
| 316 |
returnOK; |
| 317 |
} |
| 318 |
|
| 319 |
|
| 320 |
int /* map a Radiance picture */ |
| 321 |
tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp) |
| 322 |
BYTE **psp; |
| 323 |
int *xp, *yp; |
| 324 |
int flags; |
| 325 |
RGBPRIMP monpri; |
| 326 |
double gamval, Lddyn, Ldmax; |
| 327 |
char *fname; |
| 328 |
FILE *fp; |
| 329 |
{ |
| 330 |
char *funcName = fname==NULL ? "tmMapPicture" : fname; |
| 331 |
FILE *inpf; |
| 332 |
BYTE *cp; |
| 333 |
TMbright *lp; |
| 334 |
int err; |
| 335 |
/* check arguments */ |
| 336 |
if (psp == NULL | xp == NULL | yp == NULL | monpri == NULL | |
| 337 |
(fname == NULL & fp == TM_GETFILE)) |
| 338 |
returnErr(TM_E_ILLEGAL); |
| 339 |
/* set defaults */ |
| 340 |
if (gamval < MINGAM) gamval = DEFGAM; |
| 341 |
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN; |
| 342 |
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX; |
| 343 |
if (flags & TM_F_BW) monpri = stdprims; |
| 344 |
/* check for pcond run */ |
| 345 |
if (fp == TM_GETFILE && flags & TM_F_UNIMPL) |
| 346 |
return( dopcond(psp, xp, yp, flags, |
| 347 |
monpri, gamval, Lddyn, Ldmax, fname) ); |
| 348 |
/* initialize tone mapping */ |
| 349 |
if (tmInit(flags, monpri, gamval) == NULL) |
| 350 |
returnErr(TM_E_NOMEM); |
| 351 |
/* load & convert picture */ |
| 352 |
err = tmLoadPicture(&lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp, |
| 353 |
xp, yp, fname, fp); |
| 354 |
if (err != TM_E_OK) { |
| 355 |
tmDone(NULL); |
| 356 |
return(err); |
| 357 |
} |
| 358 |
/* allocate space for result */ |
| 359 |
if (flags & TM_F_BW) { |
| 360 |
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
| 361 |
if (*psp == NULL) { |
| 362 |
free((char *)lp); |
| 363 |
tmDone(NULL); |
| 364 |
returnErr(TM_E_NOMEM); |
| 365 |
} |
| 366 |
cp = TM_NOCHROM; |
| 367 |
} else |
| 368 |
*psp = cp; |
| 369 |
/* compute color mapping */ |
| 370 |
err = tmAddHisto(lp, *xp * *yp, 1); |
| 371 |
if (err != TM_E_OK) |
| 372 |
goto done; |
| 373 |
err = tmComputeMapping(gamval, Lddyn, Ldmax); |
| 374 |
if (err != TM_E_OK) |
| 375 |
goto done; |
| 376 |
/* map colors */ |
| 377 |
err = tmMapPixels(*psp, lp, cp, *xp * *yp); |
| 378 |
|
| 379 |
done: /* clean up */ |
| 380 |
free((char *)lp); |
| 381 |
tmDone(NULL); |
| 382 |
if (err != TM_E_OK) { /* free memory on error */ |
| 383 |
free((char *)*psp); |
| 384 |
*psp = NULL; |
| 385 |
returnErr(err); |
| 386 |
} |
| 387 |
returnOK; |
| 388 |
} |
| 389 |
|
| 390 |
|
| 391 |
static void |
| 392 |
colrNewSpace(tms) /* color space changed for tone mapping */ |
| 393 |
register struct tmStruct *tms; |
| 394 |
{ |
| 395 |
register COLRDATA *cd; |
| 396 |
double d; |
| 397 |
|
| 398 |
cd = (COLRDATA *)tms->pd[colrReg]; |
| 399 |
cd->clfb[RED] = 256.*tms->clf[RED] + .5; |
| 400 |
cd->clfb[GRN] = 256.*tms->clf[GRN] + .5; |
| 401 |
cd->clfb[BLU] = 256.*tms->clf[BLU] + .5; |
| 402 |
cd->clfb[EXP] = COLXS; |
| 403 |
d = TM_BRTSCALE*log(tms->inpsf); |
| 404 |
cd->inpsfb = d<0. ? d-.5 : d+.5; |
| 405 |
} |
| 406 |
|
| 407 |
|
| 408 |
static MEM_PTR |
| 409 |
colrInit(tms) /* initialize private data for tone mapping */ |
| 410 |
register struct tmStruct *tms; |
| 411 |
{ |
| 412 |
register COLRDATA *cd; |
| 413 |
register int i; |
| 414 |
/* allocate our data */ |
| 415 |
cd = (COLRDATA *)malloc(sizeof(COLRDATA)); |
| 416 |
if (cd == NULL) |
| 417 |
return(NULL); |
| 418 |
tms->pd[colrReg] = (MEM_PTR)cd; |
| 419 |
/* compute gamma table */ |
| 420 |
for (i = GAMTSZ; i--; ) |
| 421 |
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam); |
| 422 |
/* compute color and scale factors */ |
| 423 |
colrNewSpace(tms); |
| 424 |
return((MEM_PTR)cd); |
| 425 |
} |
