#ifndef lint
static const char RCSid[] = "$Id: tmapcolrs.c,v 3.10 2003/02/22 02:07:22 greg Exp $";
#endif
/*
* Routines for tone mapping on Radiance RGBE and XYZE pictures.
*
* Externals declared in tonemap.h
*/
/* ====================================================================
* The Radiance Software License, Version 1.0
*
* Copyright (c) 1990 - 2002 The Regents of the University of California,
* through Lawrence Berkeley National Laboratory. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes Radiance software
* (http://radsite.lbl.gov/)
* developed by the Lawrence Berkeley National Laboratory
* (http://www.lbl.gov/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
* and "The Regents of the University of California" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact radiance@radsite.lbl.gov.
*
* 5. Products derived from this software may not be called "Radiance",
* nor may "Radiance" appear in their name, without prior written
* permission of Lawrence Berkeley National Laboratory.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of Lawrence Berkeley National Laboratory. For more
* information on Lawrence Berkeley National Laboratory, please see
* .
*/
#include
#include
#include
#include
#include "tmprivat.h"
#include "resolu.h"
#ifndef TM_PIC_CTRANS
#define TM_PIC_CTRANS 1 /* transform colors? (expensive) */
#endif
#define GAMTSZ 1024
typedef struct {
BYTE gamb[GAMTSZ]; /* gamma lookup table */
COLR clfb; /* encoded tm->clf */
TMbright inpsfb; /* encoded tm->inpsf */
} COLRDATA;
#ifdef NOPROTO
static MEM_PTR colrInit();
static void colrNewSpace();
#else
static MEM_PTR colrInit(struct tmStruct *);
static void colrNewSpace(struct tmStruct *);
#endif
static struct tmPackage colrPkg = { /* our package functions */
colrInit, colrNewSpace, free
};
static int colrReg = -1; /* our package registration number */
#define LOGISZ 260
static TMbright logi[LOGISZ];
int
tmCvColrs(ls, cs, scan, len) /* convert RGBE/XYZE colors */
TMbright *ls;
BYTE *cs;
COLR *scan;
int len;
{
static char funcName[] = "tmCvColrs";
COLR cmon;
register COLRDATA *cd;
register int i, bi, li;
if (tmTop == NULL)
returnErr(TM_E_TMINVAL);
if (ls == NULL | scan == NULL | len < 0)
returnErr(TM_E_ILLEGAL);
#if TM_PIC_CTRANS
if (tmNeedMatrix(tmTop)) { /* need floating point */
#else
if (tmTop->inppri == TM_XYZPRIM) { /* no way around this */
#endif
register COLOR *newscan;
newscan = (COLOR *)tempbuffer(len*sizeof(COLOR));
if (newscan == NULL)
returnErr(TM_E_NOMEM);
for (i = len; i--; )
colr_color(newscan[i], scan[i]);
return(tmCvColors(ls, cs, newscan, len));
}
if (colrReg < 0) { /* build tables if necessary */
colrReg = tmRegPkg(&colrPkg);
if (colrReg < 0)
returnErr(TM_E_CODERR1);
for (i = 256; i--; )
logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5;
for (i = 256; i < LOGISZ; i++)
logi[i] = 0;
tmMkMesofact();
}
if ((cd = (COLRDATA *)tmPkgData(tmTop,colrReg)) == NULL)
returnErr(TM_E_NOMEM);
for (i = len; i--; ) {
copycolr(cmon, scan[i]);
/* world luminance */
li = ( cd->clfb[RED]*cmon[RED] +
cd->clfb[GRN]*cmon[GRN] +
cd->clfb[BLU]*cmon[BLU] ) >> 8;
bi = BRT2SCALE(cmon[EXP]-COLXS) +
logi[li] + cd->inpsfb;
if (li <= 0) {
bi = TM_NOBRT; /* bogus value */
li = 1; /* avoid li==0 */
}
ls[i] = bi;
if (cs == TM_NOCHROM) /* no color? */
continue;
/* mesopic adj. */
if (tmTop->flags & TM_F_MESOPIC && bi < BMESUPPER) {
register int pf, sli = normscot(cmon);
if (bi < BMESLOWER)
cmon[RED] = cmon[GRN] = cmon[BLU] = sli;
else {
if (tmTop->flags & TM_F_BW)
cmon[RED] = cmon[GRN] = cmon[BLU] = li;
pf = tmMesofact[bi-BMESLOWER];
sli *= 256 - pf;
cmon[RED] = ( sli + pf*cmon[RED] ) >> 8;
cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8;
cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8;
}
} else if (tmTop->flags & TM_F_BW) {
cmon[RED] = cmon[GRN] = cmon[BLU] = li;
}
bi = ( (int4)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8;
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
bi = ( (int4)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8;
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
bi = ( (int4)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 8;
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
}
returnOK;
}
#define FMTRGB 1 /* Input is RGBE */
#define FMTCIE 2 /* Input is CIE XYZE */
#define FMTUNK 3 /* Input format is unspecified */
#define FMTBAD 4 /* Input is not a recognized format */
static struct radhead {
int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */
double expos; /* input exposure value */
RGBPRIMP primp; /* input primaries */
RGBPRIMS mypri; /* custom primaries */
} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS};
static int
headline(s, rh) /* grok a header line */
register char *s;
register struct radhead *rh;
{
char fmt[32];
if (formatval(fmt, s)) {
if (!strcmp(fmt, COLRFMT))
rh->format = FMTRGB;
else if (!strcmp(fmt, CIEFMT))
rh->format = FMTCIE;
else
rh->format = FMTBAD;
return(0);
}
if (isexpos(s)) {
rh->expos *= exposval(s);
return(0);
}
if (isprims(s)) {
primsval(rh->mypri, s);
rh->primp = rh->mypri;
return(0);
}
return(0);
}
int
tmLoadPicture(lpp, cpp, xp, yp, fname, fp) /* convert Radiance picture */
TMbright **lpp;
BYTE **cpp;
int *xp, *yp;
char *fname;
FILE *fp;
{
char *funcName = fname==NULL ? "tmLoadPicture" : fname;
FILE *inpf;
struct radhead info;
int err;
COLR *scanin = NULL;
int i;
/* check arguments */
if (tmTop == NULL)
returnErr(TM_E_TMINVAL);
if (lpp == NULL | xp == NULL | yp == NULL |
(fname == NULL & fp == TM_GETFILE))
returnErr(TM_E_ILLEGAL);
*xp = *yp = 0; /* error precaution */
if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "r")) == NULL)
returnErr(TM_E_BADFILE);
*lpp = NULL;
if (cpp != TM_NOCHROMP) *cpp = NULL;
info = rhdefault; /* get our header */
getheader(inpf, headline, (char *)&info);
if (info.format == FMTBAD | info.expos <= 0. ||
fgetresolu(xp, yp, inpf) < 0) {
err = TM_E_BADFILE; goto done;
}
if (info.format == FMTUNK) /* assume RGBE format */
info.format = FMTRGB;
if (info.format == FMTRGB)
info.expos /= WHTEFFICACY;
else if (info.format == FMTCIE)
info.primp = TM_XYZPRIM;
/* prepare library */
if ((err = tmSetSpace(info.primp, 1./info.expos)) != TM_E_OK)
goto done;
err = TM_E_NOMEM; /* allocate arrays */
*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp);
if (*lpp == NULL)
goto done;
if (cpp != TM_NOCHROMP) {
*cpp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp);
if (*cpp == NULL)
goto done;
}
scanin = (COLR *)malloc(sizeof(COLR) * *xp);
if (scanin == NULL)
goto done;
err = TM_E_BADFILE; /* read & convert scanlines */
for (i = 0; i < *yp; i++) {
if (freadcolrs(scanin, *xp, inpf) < 0) {
err = TM_E_BADFILE; break;
}
err = tmCvColrs(*lpp + (i * *xp),
cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp),
scanin, *xp);
if (err != TM_E_OK)
break;
}
done: /* clean up */
if (fp == NULL)
fclose(inpf);
if (scanin != NULL)
free((MEM_PTR)scanin);
if (err != TM_E_OK) {
if (*lpp != NULL)
free((MEM_PTR)*lpp);
if (cpp != TM_NOCHROMP && *cpp != NULL)
free((MEM_PTR)*cpp);
returnErr(err);
}
returnOK;
}
#ifdef PCOND
int /* run pcond to map picture */
dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname)
BYTE **psp;
int *xp, *yp;
int flags;
RGBPRIMP monpri;
double gamval, Lddyn, Ldmax;
char *fname;
{
char *funcName = fname;
char cmdbuf[1024];
FILE *infp;
register COLR *scan;
register BYTE *rp;
int y;
register int x;
/* set up gamma correction */
if (setcolrcor(pow, 1./gamval) < 0)
returnErr(TM_E_NOMEM);
/* create command */
strcpy(cmdbuf, PCOND);
if (flags & TM_F_HCONTR)
strcat(cmdbuf, " -s");
if (flags & TM_F_MESOPIC)
strcat(cmdbuf, " -c");
if (flags & TM_F_LINEAR)
strcat(cmdbuf, " -l");
if (flags & TM_F_ACUITY)
strcat(cmdbuf, " -a");
if (flags & TM_F_VEIL)
strcat(cmdbuf, " -v");
if (flags & TM_F_CWEIGHT)
strcat(cmdbuf, " -w");
if (monpri != stdprims)
sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f",
monpri[RED][CIEX], monpri[RED][CIEY],
monpri[GRN][CIEX], monpri[GRN][CIEY],
monpri[BLU][CIEX], monpri[BLU][CIEY],
monpri[WHT][CIEX], monpri[WHT][CIEY]);
sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname);
/* start pcond */
if ((infp = popen(cmdbuf, "r")) == NULL)
returnErr(TM_E_BADFILE);
/* check picture format and size */
if (checkheader(infp, COLRFMT, NULL) < 0 ||
fgetresolu(xp, yp, infp) < 0) {
pclose(infp);
returnErr(TM_E_BADFILE);
}
/* allocate arrays */
scan = (COLR *)malloc(sizeof(COLR) * *xp);
if (flags & TM_F_BW)
rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp);
else
rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp);
if ((*psp = rp) == NULL | scan == NULL) {
pclose(infp);
returnErr(TM_E_NOMEM);
}
/* read and gamma map file */
for (y = 0; y < *yp; y++) {
if (freadcolrs(scan, *xp, infp) < 0) {
pclose(infp);
free((MEM_PTR)scan);
free((MEM_PTR)*psp);
*psp = NULL;
returnErr(TM_E_BADFILE);
}
colrs_gambs(scan, *xp);
if (flags & TM_F_BW)
for (x = 0; x < *xp; x++)
*rp++ = normbright(scan[x]);
else
for (x = 0; x < *xp; x++) {
*rp++ = scan[x][RED];
*rp++ = scan[x][GRN];
*rp++ = scan[x][BLU];
}
}
free((MEM_PTR)scan);
pclose(infp);
returnOK;
}
#endif
int /* map a Radiance picture */
tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp)
BYTE **psp;
int *xp, *yp;
int flags;
RGBPRIMP monpri;
double gamval, Lddyn, Ldmax;
char *fname;
FILE *fp;
{
char *funcName = fname==NULL ? "tmMapPicture" : fname;
BYTE *cp;
TMbright *lp;
int err;
/* check arguments */
if (psp == NULL | xp == NULL | yp == NULL | monpri == NULL |
(fname == NULL & fp == TM_GETFILE))
returnErr(TM_E_ILLEGAL);
/* set defaults */
if (gamval < MINGAM) gamval = DEFGAM;
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
if (flags & TM_F_BW) monpri = stdprims;
#ifdef PCOND
/* check for pcond run */
if (fp == TM_GETFILE && flags & TM_F_UNIMPL)
return( dopcond(psp, xp, yp, flags,
monpri, gamval, Lddyn, Ldmax, fname) );
#endif
/* initialize tone mapping */
if (tmInit(flags, monpri, gamval) == NULL)
returnErr(TM_E_NOMEM);
/* load & convert picture */
err = tmLoadPicture(&lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
xp, yp, fname, fp);
if (err != TM_E_OK) {
tmDone(NULL);
return(err);
}
/* allocate space for result */
if (flags & TM_F_BW) {
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp);
if (*psp == NULL) {
free((MEM_PTR)lp);
tmDone(NULL);
returnErr(TM_E_NOMEM);
}
cp = TM_NOCHROM;
} else
*psp = cp;
/* compute color mapping */
err = tmAddHisto(lp, *xp * *yp, 1);
if (err != TM_E_OK)
goto done;
err = tmComputeMapping(gamval, Lddyn, Ldmax);
if (err != TM_E_OK)
goto done;
/* map colors */
err = tmMapPixels(*psp, lp, cp, *xp * *yp);
done: /* clean up */
free((MEM_PTR)lp);
tmDone(NULL);
if (err != TM_E_OK) { /* free memory on error */
free((MEM_PTR)*psp);
*psp = NULL;
returnErr(err);
}
returnOK;
}
static void
colrNewSpace(tms) /* color space changed for tone mapping */
register struct tmStruct *tms;
{
register COLRDATA *cd;
double d;
cd = (COLRDATA *)tms->pd[colrReg];
cd->clfb[RED] = 256.*tms->clf[RED] + .5;
cd->clfb[GRN] = 256.*tms->clf[GRN] + .5;
cd->clfb[BLU] = 256.*tms->clf[BLU] + .5;
cd->clfb[EXP] = COLXS;
d = TM_BRTSCALE*log(tms->inpsf);
cd->inpsfb = d<0. ? d-.5 : d+.5;
}
static MEM_PTR
colrInit(tms) /* initialize private data for tone mapping */
register struct tmStruct *tms;
{
register COLRDATA *cd;
register int i;
/* allocate our data */
cd = (COLRDATA *)malloc(sizeof(COLRDATA));
if (cd == NULL)
return(NULL);
tms->pd[colrReg] = (MEM_PTR)cd;
/* compute gamma table */
for (i = GAMTSZ; i--; )
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam);
/* compute color and scale factors */
colrNewSpace(tms);
return((MEM_PTR)cd);
}