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/* Copyright (c) 1997 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* Routines for tone mapping on Radiance RGBE and XYZE pictures. |
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* See tonemap.h for detailed function descriptions. |
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*/ |
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|
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#include <stdio.h> |
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#include <math.h> |
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#include "tmprivat.h" |
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#include "resolu.h" |
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|
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|
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extern char *tempbuffer(); |
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|
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#define LOGISZ 260 |
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static TMbright logi[LOGISZ]; |
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static BYTE photofact[BMESUPPER-BMESLOWER]; |
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|
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|
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int |
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tmCvColrs(ls, cs, scan, len) /* tone map RGBE/XYZE colors */ |
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TMbright *ls; |
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BYTE *cs; |
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COLR *scan; |
| 30 |
int len; |
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{ |
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static char funcName[] = "tmCvColrs"; |
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COLR cmon; |
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register int i, bi, li; |
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|
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if (tmTop == NULL) |
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returnErr(TM_E_TMINVAL); |
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if (ls == NULL | scan == NULL | len <= 0) |
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returnErr(TM_E_ILLEGAL); |
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if (tmTop->flags & TM_F_NEEDMAT) { /* need floating point */ |
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register COLOR *newscan; |
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newscan = (COLOR *)tempbuffer(len*sizeof(COLOR)); |
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if (newscan == NULL) |
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returnErr(TM_E_NOMEM); |
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for (i = len; i--; ) |
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colr_color(newscan[i], scan[i]); |
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return(tmCvColors(ls, cs, newscan, len)); |
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} |
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if (logi[0] == 0) { /* build tables if necessary */ |
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for (i = 256; i--; ) |
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logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5; |
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for (i = 256; i < LOGISZ; i++) |
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logi[i] = logi[255]; |
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for (i = BMESLOWER; i < BMESUPPER; i++) |
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photofact[i-BMESLOWER] = 256. * |
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(tmLuminance(i) - LMESLOWER) / |
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(LMESUPPER - LMESLOWER); |
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} |
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for (i = len; i--; ) { |
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copycolr(cmon, scan[i]); |
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/* world luminance */ |
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li = ( tmTop->clfb[RED]*cmon[RED] + |
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tmTop->clfb[GRN]*cmon[GRN] + |
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tmTop->clfb[BLU]*cmon[BLU] ) >> 8; |
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bi = BRT2SCALE*(cmon[EXP]-COLXS) + |
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logi[li] + tmTop->inpsfb; |
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if (bi < MINBRT) { |
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bi = MINBRT-1; /* bogus value */ |
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li++; /* avoid li==0 */ |
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} |
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ls[i] = bi; |
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if (cs == TM_NOCHROM) /* no color? */ |
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continue; |
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/* mesopic adj. */ |
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if (tmTop->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
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register int pf, sli = normscot(cmon); |
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if (bi < BMESLOWER) |
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cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
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else { |
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if (tmTop->flags & TM_F_BW) |
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cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
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pf = photofact[bi-BMESLOWER]; |
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sli *= 256 - pf; |
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cmon[RED] = ( sli + pf*cmon[RED] ) >> 8; |
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cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8; |
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cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8; |
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} |
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} else if (tmTop->flags & TM_F_BW) { |
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cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
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} |
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bi = ( (int4)TM_GAMTSZ*tmTop->clfb[RED]*cmon[RED]/li ) >> 8; |
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cs[3*i ] = bi>=TM_GAMTSZ ? 255 : tmTop->gamb[bi]; |
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bi = ( (int4)TM_GAMTSZ*tmTop->clfb[GRN]*cmon[GRN]/li ) >> 8; |
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cs[3*i+1] = bi>=TM_GAMTSZ ? 255 : tmTop->gamb[bi]; |
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bi = ( (int4)TM_GAMTSZ*tmTop->clfb[BLU]*cmon[BLU]/li ) >> 8; |
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cs[3*i+2] = bi>=TM_GAMTSZ ? 255 : tmTop->gamb[bi]; |
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} |
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returnOK; |
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} |
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|
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|
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#define FMTRGB 1 /* Input is RGBE */ |
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#define FMTCIE 2 /* Input is CIE XYZE */ |
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#define FMTUNK 3 /* Input format is unspecified */ |
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#define FMTBAD 4 /* Input is not a recognized format */ |
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|
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static struct radhead { |
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int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */ |
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double expos; /* input exposure value */ |
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RGBPRIMP primp; /* input primaries */ |
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RGBPRIMS mypri; /* custom primaries */ |
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} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS}; |
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|
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|
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static int |
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headline(s, rh) /* grok a header line */ |
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register char *s; |
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register struct radhead *rh; |
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{ |
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char fmt[32]; |
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|
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if (formatval(fmt, s)) { |
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if (!strcmp(fmt, COLRFMT)) |
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rh->format = FMTRGB; |
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else if (!strcmp(fmt, CIEFMT)) |
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rh->format = FMTCIE; |
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else |
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rh->format = FMTBAD; |
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return; |
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} |
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if (isexpos(s)) { |
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rh->expos *= exposval(s); |
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return; |
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} |
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if (isprims(s)) { |
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primsval(rh->mypri, s); |
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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); |
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info = rhdefault; /* get our header */ |
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getheader(inpf, headline, (char *)&info); |
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if (info.format == FMTBAD | info.expos <= 0. || |
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fgetresolu(xp, yp, inpf) < 0) { |
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err = TM_E_BADFILE; goto done; |
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} |
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if (info.format == FMTUNK) /* assume RGBE format */ |
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info.format = FMTRGB; |
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if (info.format == FMTRGB) |
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info.expos /= WHTEFFICACY; |
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else if (info.format == FMTCIE) |
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info.primp = TM_XYZPRIM; |
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/* prepare library */ |
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if ((err = tmSetSpace(info.primp, 1./info.expos)) != TM_E_OK) |
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goto done; |
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err = TM_E_NOMEM; /* allocate arrays */ |
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*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp); |
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if (*lpp == NULL) |
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goto done; |
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if (cpp != TM_NOCHROMP) { |
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*cpp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
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if (*cpp == NULL) |
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goto done; |
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} |
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scanin = (COLR *)malloc(sizeof(COLR) * *xp); |
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if (scanin == NULL) |
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goto done; |
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err = TM_E_BADFILE; /* read & convert scanlines */ |
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for (i = 0; i < *yp; i++) { |
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if (freadcolrs(scanin, *xp, inpf) < 0) { |
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err = TM_E_BADFILE; break; |
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} |
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err = tmCvColrs(*lpp + (i * *xp), |
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cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp), |
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scanin, *xp); |
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if (err != TM_E_OK) |
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break; |
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} |
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done: /* clean up */ |
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if (fp == NULL) |
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fclose(inpf); |
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if (scanin != NULL) |
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free((char *)scanin); |
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if (err != TM_E_OK) |
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returnErr(err); |
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returnOK; |
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} |
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|
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|
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int /* run pcond to map picture */ |
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dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname) |
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BYTE **psp; |
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int *xp, *yp; |
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int flags; |
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RGBPRIMP monpri; |
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double gamval, Lddyn, Ldmax; |
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char *fname; |
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{ |
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char *funcName = fname; |
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char cmdbuf[512]; |
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FILE *infp; |
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register COLR *scan; |
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register BYTE *rp; |
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int y; |
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register int x; |
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/* set up gamma correction */ |
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if (setcolrcor(pow, 1./gamval) < 0) |
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returnErr(TM_E_NOMEM); |
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/* create command */ |
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strcpy(cmdbuf, "pcond "); |
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if (flags & TM_F_HCONTR) |
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strcat(cmdbuf, "-s "); |
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if (flags & TM_F_MESOPIC) |
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strcat(cmdbuf, "-c "); |
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if (flags & TM_F_LINEAR) |
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strcat(cmdbuf, "-l "); |
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if (flags & TM_F_ACUITY) |
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strcat(cmdbuf, "-a "); |
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if (flags & TM_F_VEIL) |
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strcat(cmdbuf, "-v "); |
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if (flags & TM_F_CWEIGHT) |
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strcat(cmdbuf, "-w "); |
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sprintf(cmdbuf+strlen(cmdbuf), |
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"-p %f %f %f %f %f %f %f %f -d %f -u %f %s", |
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monpri[RED][CIEX], monpri[RED][CIEY], |
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monpri[GRN][CIEX], monpri[GRN][CIEY], |
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monpri[BLU][CIEX], monpri[BLU][CIEY], |
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monpri[WHT][CIEX], monpri[WHT][CIEY], |
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Lddyn, Ldmax, fname); |
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/* start pcond */ |
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if ((infp = popen(cmdbuf, "r")) == NULL) |
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returnErr(TM_E_BADFILE); |
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/* check picture format and size */ |
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if (checkheader(infp, COLRFMT, NULL) < 0 || |
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fgetresolu(xp, yp, infp) < 0) { |
| 261 |
pclose(infp); |
| 262 |
returnErr(TM_E_BADFILE); |
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} |
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/* allocate arrays */ |
| 265 |
scan = (COLR *)malloc(sizeof(COLR) * *xp); |
| 266 |
if (flags & TM_F_BW) |
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rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
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else |
| 269 |
rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
| 270 |
if ((*psp = rp) == NULL | scan == NULL) { |
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pclose(infp); |
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returnErr(TM_E_NOMEM); |
| 273 |
} |
| 274 |
/* read and gamma map file */ |
| 275 |
for (y = 0; y < *yp; y++) { |
| 276 |
if (freadcolrs(scan, *xp, infp) < 0) { |
| 277 |
pclose(infp); |
| 278 |
free((char *)scan); |
| 279 |
free((char *)*psp); |
| 280 |
*psp = NULL; |
| 281 |
returnErr(TM_E_BADFILE); |
| 282 |
} |
| 283 |
colrs_gambs(scan, *xp); |
| 284 |
if (flags & TM_F_BW) |
| 285 |
for (x = 0; x < *xp; x++) |
| 286 |
*rp++ = normbright(scan[x]); |
| 287 |
else |
| 288 |
for (x = 0; x < *xp; x++) { |
| 289 |
*rp++ = scan[x][RED]; |
| 290 |
*rp++ = scan[x][GRN]; |
| 291 |
*rp++ = scan[x][BLU]; |
| 292 |
} |
| 293 |
} |
| 294 |
free((char *)scan); |
| 295 |
pclose(infp); |
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returnOK; |
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} |
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|
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|
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int /* map a Radiance picture */ |
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tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp) |
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BYTE **psp; |
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int *xp, *yp; |
| 304 |
int flags; |
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RGBPRIMP monpri; |
| 306 |
double gamval, Lddyn, Ldmax; |
| 307 |
char *fname; |
| 308 |
FILE *fp; |
| 309 |
{ |
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char *funcName = fname==NULL ? "tmMapPicture" : fname; |
| 311 |
FILE *inpf; |
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BYTE *cp; |
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TMbright *lp; |
| 314 |
int err; |
| 315 |
/* check arguments */ |
| 316 |
if (psp == NULL | xp == NULL | yp == NULL | monpri == NULL | |
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(fname == NULL & fp == TM_GETFILE)) |
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returnErr(TM_E_ILLEGAL); |
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/* set defaults */ |
| 320 |
if (gamval < MINGAM) gamval = DEFGAM; |
| 321 |
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN; |
| 322 |
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX; |
| 323 |
if (flags & TM_F_BW) monpri = stdprims; |
| 324 |
/* check for pcond run */ |
| 325 |
if (fp == TM_GETFILE && flags & TM_F_UNIMPL) |
| 326 |
return( dopcond(psp, xp, yp, flags, |
| 327 |
monpri, gamval, Lddyn, Ldmax, fname) ); |
| 328 |
/* initialize tone mapping */ |
| 329 |
if (tmInit(flags, monpri, gamval) == NULL) |
| 330 |
returnErr(TM_E_NOMEM); |
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/* load & convert picture */ |
| 332 |
err = tmLoadPicture(&lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp, |
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xp, yp, fname, fp); |
| 334 |
if (err != TM_E_OK) { |
| 335 |
tmDone(NULL); |
| 336 |
return(err); |
| 337 |
} |
| 338 |
/* allocate space for result */ |
| 339 |
if (flags & TM_F_BW) { |
| 340 |
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
| 341 |
if (*psp == NULL) { |
| 342 |
free((char *)lp); |
| 343 |
tmDone(NULL); |
| 344 |
returnErr(TM_E_NOMEM); |
| 345 |
} |
| 346 |
cp = TM_NOCHROM; |
| 347 |
} else |
| 348 |
*psp = cp; |
| 349 |
/* compute color mapping */ |
| 350 |
err = tmAddHisto(lp, *xp * *yp, 1); |
| 351 |
if (err != TM_E_OK) |
| 352 |
goto done; |
| 353 |
err = tmComputeMapping(gamval, Lddyn, Ldmax); |
| 354 |
if (err != TM_E_OK) |
| 355 |
goto done; |
| 356 |
/* map colors */ |
| 357 |
err = tmMapPixels(*psp, lp, cp, *xp * *yp); |
| 358 |
|
| 359 |
done: /* clean up */ |
| 360 |
free((char *)lp); |
| 361 |
tmDone(NULL); |
| 362 |
if (err != TM_E_OK) { /* free memory on error */ |
| 363 |
free((char *)*psp); |
| 364 |
*psp = NULL; |
| 365 |
returnErr(err); |
| 366 |
} |
| 367 |
returnOK; |
| 368 |
} |
