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/* Copyright (c) 1997 Regents of the University of California */
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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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* 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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#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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extern char *tempbuffer();
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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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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;
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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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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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#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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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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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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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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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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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) {
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pclose(infp);
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returnErr(TM_E_BADFILE);
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}
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/* allocate arrays */
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if (flags & TM_F_BW)
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rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp);
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else
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rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp);
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scan = (COLR *)malloc(sizeof(COLR) * *xp);
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if ((*psp = rp) == NULL | scan == NULL) {
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pclose(infp);
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returnErr(TM_E_NOMEM);
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}
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/* read and gamma map file */
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for (y = 0; y < *yp; y++) {
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if (freadcolrs(scan, *xp, infp) < 0) {
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pclose(infp);
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returnErr(TM_E_BADFILE);
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}
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colrs_gambs(scan, *xp);
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if (flags & TM_F_BW)
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for (x = 0; x < *xp; x++)
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*rp++ = normbright(scan[x]);
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else
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for (x = 0; x < *xp; x++) {
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*rp++ = scan[x][RED];
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*rp++ = scan[x][GRN];
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*rp++ = scan[x][BLU];
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}
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}
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free((char *)scan);
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pclose(infp);
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returnOK;
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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;
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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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FILE *fp;
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{
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char *funcName = fname==NULL ? "tmMapPicture" : fname;
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FILE *inpf;
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BYTE *cp;
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TMbright *lp;
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int err;
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/* check arguments */
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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 */
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if (gamval < MINGAM) gamval = DEFGAM;
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if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
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if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
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if (flags & TM_F_BW) monpri = stdprims;
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/* check for pcond run */
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if (fp == TM_GETFILE && flags & TM_F_UNIMPL)
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return( dopcond(psp, xp, yp, flags,
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monpri, gamval, Lddyn, Ldmax, fname) );
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/* initialize tone mapping */
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if (tmInit(flags, monpri, gamval) == NULL)
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returnErr(TM_E_NOMEM);
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/* load & convert picture */
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err = tmLoadPicture(&lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
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xp, yp, fname, fp);
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if (err != TM_E_OK) {
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tmDone(NULL);
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return(err);
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| 334 |
}
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| 335 |
/* allocate space for result */
|
| 336 |
if (flags & TM_F_BW) {
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| 337 |
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp);
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| 338 |
if (*psp == NULL)
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| 339 |
returnErr(TM_E_NOMEM);
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| 340 |
cp = TM_NOCHROM;
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| 341 |
} else
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| 342 |
*psp = cp;
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| 343 |
/* compute color mapping */
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| 344 |
err = tmAddHisto(lp, *xp * *yp, 1);
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| 345 |
if (err != TM_E_OK)
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| 346 |
goto done;
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| 347 |
err = tmComputeMapping(gamval, Lddyn, Ldmax);
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| 348 |
if (err != TM_E_OK)
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| 349 |
goto done;
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| 350 |
/* map colors */
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| 351 |
err = tmMapPixels(*psp, lp, cp, *xp * *yp);
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| 352 |
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| 353 |
done: /* clean up */
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| 354 |
free((char *)lp);
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| 355 |
tmDone(NULL);
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| 356 |
if (err != TM_E_OK) { /* free memory on error */
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| 357 |
free((char *)*psp);
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| 358 |
*psp = NULL;
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| 359 |
returnErr(err);
|
| 360 |
}
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| 361 |
returnOK;
|
| 362 |
}
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