src/common/tmapcolrs.c

#ifndef lint
static const char       RCSid[] = "$Id: tmapcolrs.c,v 3.16 2004/10/23 18:55:52 schorsch Exp $";
#endif
/*
 * Routines for tone mapping on Radiance RGBE and XYZE pictures.
 *
 * Externals declared in tonemap.h
 */

#include "copyright.h"

#include        <stdio.h>
#include        <string.h>
#include        <math.h>
#include        <time.h>

#include        "tmprivat.h"
#include        "resolu.h"
#include        "rtprocess.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;

static MEM_PTR  colrInit(TMstruct *);
static void     colrNewSpace(TMstruct *);
static gethfunc headline;

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(                              /* convert RGBE/XYZE colors */
TMstruct        *tms,
TMbright        *ls,
BYTE    *cs,
COLR    *scan,
int     len
)
{
        static char     funcName[] = "tmCvColrs";
        COLR    cmon;
        register COLRDATA       *cd;
        register int    i, bi, li;

        if (tms == NULL)
                returnErr(TM_E_TMINVAL);
        if ((ls == NULL) | (scan == NULL) | (len < 0))
                returnErr(TM_E_ILLEGAL);
#if TM_PIC_CTRANS
        if (tmNeedMatrix(tms)) {                /* need floating point */
#else
        if (tms->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(tms, 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(tms,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 (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) {
                        register int    pf, sli = normscot(cmon);
                        if (bi < BMESLOWER)
                                cmon[RED] = cmon[GRN] = cmon[BLU] = sli;
                        else {
                                if (tms->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 (tms->flags & TM_F_BW) {
                        cmon[RED] = cmon[GRN] = cmon[BLU] = li;
                }
                bi = ( (int32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8;
                cs[3*i  ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
                bi = ( (int32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8;
                cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
                bi = ( (int32)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(                       /* grok a header line */
        register char   *s,
        void    *vrh
)
{
        char    fmt[32];
        register struct radhead *rh = vrh;

        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(                          /* convert Radiance picture */
TMstruct        *tms,
TMbright        **lpp,
BYTE    **cpp,
int     *xp,
int     *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 (tms == 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, &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(tms, 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(tms, *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
static 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;
        TMstruct        *tms = NULL;
        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;
        TMstruct        *tms;
        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 ((tms = tmInit(flags, monpri, gamval)) == NULL)
                returnErr(TM_E_NOMEM);
                                                /* load & convert picture */
        err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
                        xp, yp, fname, fp);
        if (err != TM_E_OK) {
                tmDone(tms);
                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(tms);
                        returnErr(TM_E_NOMEM);
                }
                cp = TM_NOCHROM;
        } else
                *psp = cp;
                                                /* compute color mapping */
        err = tmAddHisto(tms, lp, *xp * *yp, 1);
        if (err != TM_E_OK)
                goto done;
        err = tmComputeMapping(tms, gamval, Lddyn, Ldmax);
        if (err != TM_E_OK)
                goto done;
                                                /* map colors */
        err = tmMapPixels(tms, *psp, lp, cp, *xp * *yp);

done:                                           /* clean up */
        free((MEM_PTR)lp);
        tmDone(tms);
        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 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 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);
}
Revision:	3.17
Committed:	Fri Jan 7 20:33:02 2005 UTC (20 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 3.16:	+42 -35 lines
Log Message:	Modernized tone-mapping routines with structure pointer r.t. stack
#	User	Rev	Content
1	greg	3.1	#ifndef lint
2	greg	3.17	static const char RCSid[] = "$Id: tmapcolrs.c,v 3.16 2004/10/23 18:55:52 schorsch Exp $";
3	greg	3.1	#endif
4			/*
5			* Routines for tone mapping on Radiance RGBE and XYZE pictures.
6	greg	3.10	*
7			* Externals declared in tonemap.h
8			*/
9
10	greg	3.11	#include "copyright.h"
11	greg	3.1
12			#include <stdio.h>
13	greg	3.10	#include <string.h>
14	greg	3.1	#include <math.h>
15	greg	3.10	#include <time.h>
16	schorsch	3.16
17	greg	3.1	#include "tmprivat.h"
18			#include "resolu.h"
19	schorsch	3.16	#include "rtprocess.h"
20	greg	3.1
21	greg	3.10	#ifndef TM_PIC_CTRANS
22			#define TM_PIC_CTRANS 1 /* transform colors? (expensive) */
23			#endif
24	greg	3.1
25	greg	3.3	#define GAMTSZ 1024
26
27			typedef struct {
28			BYTE gamb[GAMTSZ]; /* gamma lookup table */
29			COLR clfb; /* encoded tm->clf */
30			TMbright inpsfb; /* encoded tm->inpsf */
31			} COLRDATA;
32
33	greg	3.17	static MEM_PTR colrInit(TMstruct *);
34			static void colrNewSpace(TMstruct *);
35	schorsch	3.15	static gethfunc headline;
36
37	greg	3.3	static struct tmPackage colrPkg = { /* our package functions */
38			colrInit, colrNewSpace, free
39			};
40			static int colrReg = -1; /* our package registration number */
41
42	greg	3.1	#define LOGISZ 260
43			static TMbright logi[LOGISZ];
44
45
46			int
47	greg	3.17	tmCvColrs( /* convert RGBE/XYZE colors */
48			TMstruct *tms,
49			TMbright *ls,
50			BYTE *cs,
51			COLR *scan,
52			int len
53			)
54	greg	3.1	{
55			static char funcName[] = "tmCvColrs";
56			COLR cmon;
57	greg	3.3	register COLRDATA *cd;
58	greg	3.1	register int i, bi, li;
59
60	greg	3.17	if (tms == NULL)
61	greg	3.1	returnErr(TM_E_TMINVAL);
62	schorsch	3.14	if ((ls == NULL) \| (scan == NULL) \| (len < 0))
63	greg	3.1	returnErr(TM_E_ILLEGAL);
64	greg	3.10	#if TM_PIC_CTRANS
65	greg	3.17	if (tmNeedMatrix(tms)) { /* need floating point */
66	greg	3.10	#else
67	greg	3.17	if (tms->inppri == TM_XYZPRIM) { /* no way around this */
68	greg	3.10	#endif
69	greg	3.1	register COLOR *newscan;
70			newscan = (COLOR )tempbuffer(lensizeof(COLOR));
71			if (newscan == NULL)
72			returnErr(TM_E_NOMEM);
73			for (i = len; i--; )
74			colr_color(newscan[i], scan[i]);
75	greg	3.17	return(tmCvColors(tms, ls, cs, newscan, len));
76	greg	3.1	}
77	gwlarson	3.6	if (colrReg < 0) { /* build tables if necessary */
78	greg	3.3	colrReg = tmRegPkg(&colrPkg);
79			if (colrReg < 0)
80			returnErr(TM_E_CODERR1);
81	greg	3.1	for (i = 256; i--; )
82			logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5;
83			for (i = 256; i < LOGISZ; i++)
84	greg	3.10	logi[i] = 0;
85			tmMkMesofact();
86	greg	3.1	}
87	greg	3.17	if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL)
88	greg	3.3	returnErr(TM_E_NOMEM);
89	greg	3.1	for (i = len; i--; ) {
90			copycolr(cmon, scan[i]);
91			/* world luminance */
92	greg	3.3	li = ( cd->clfb[RED]*cmon[RED] +
93			cd->clfb[GRN]*cmon[GRN] +
94			cd->clfb[BLU]*cmon[BLU] ) >> 8;
95	greg	3.10	bi = BRT2SCALE(cmon[EXP]-COLXS) +
96	greg	3.3	logi[li] + cd->inpsfb;
97	greg	3.10	if (li <= 0) {
98			bi = TM_NOBRT; /* bogus value */
99			li = 1; /* avoid li==0 */
100	greg	3.1	}
101			ls[i] = bi;
102			if (cs == TM_NOCHROM) /* no color? */
103			continue;
104			/* mesopic adj. */
105	greg	3.17	if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) {
106	greg	3.1	register int pf, sli = normscot(cmon);
107			if (bi < BMESLOWER)
108			cmon[RED] = cmon[GRN] = cmon[BLU] = sli;
109			else {
110	greg	3.17	if (tms->flags & TM_F_BW)
111	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
112	greg	3.10	pf = tmMesofact[bi-BMESLOWER];
113	greg	3.1	sli *= 256 - pf;
114			cmon[RED] = ( sli + pf*cmon[RED] ) >> 8;
115			cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8;
116			cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8;
117			}
118	greg	3.17	} else if (tms->flags & TM_F_BW) {
119	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
120	greg	3.1	}
121	greg	3.12	bi = ( (int32)GAMTSZcd->clfb[RED]cmon[RED]/li ) >> 8;
122	greg	3.3	cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
123	greg	3.12	bi = ( (int32)GAMTSZcd->clfb[GRN]cmon[GRN]/li ) >> 8;
124	greg	3.3	cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
125	greg	3.12	bi = ( (int32)GAMTSZcd->clfb[BLU]cmon[BLU]/li ) >> 8;
126	greg	3.3	cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
127	greg	3.1	}
128			returnOK;
129			}
130
131
132			#define FMTRGB 1 /* Input is RGBE */
133			#define FMTCIE 2 /* Input is CIE XYZE */
134			#define FMTUNK 3 /* Input format is unspecified */
135			#define FMTBAD 4 /* Input is not a recognized format */
136
137			static struct radhead {
138			int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */
139			double expos; /* input exposure value */
140			RGBPRIMP primp; /* input primaries */
141			RGBPRIMS mypri; /* custom primaries */
142			} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS};
143
144
145			static int
146	schorsch	3.15	headline( /* grok a header line */
147			register char *s,
148			void *vrh
149			)
150	greg	3.1	{
151			char fmt[32];
152	schorsch	3.15	register struct radhead *rh = vrh;
153	greg	3.1
154			if (formatval(fmt, s)) {
155			if (!strcmp(fmt, COLRFMT))
156			rh->format = FMTRGB;
157			else if (!strcmp(fmt, CIEFMT))
158			rh->format = FMTCIE;
159			else
160			rh->format = FMTBAD;
161	gwlarson	3.7	return(0);
162	greg	3.1	}
163			if (isexpos(s)) {
164			rh->expos *= exposval(s);
165	gwlarson	3.7	return(0);
166	greg	3.1	}
167			if (isprims(s)) {
168			primsval(rh->mypri, s);
169			rh->primp = rh->mypri;
170	gwlarson	3.7	return(0);
171	greg	3.1	}
172	gwlarson	3.7	return(0);
173	greg	3.1	}
174
175
176			int
177	greg	3.17	tmLoadPicture( /* convert Radiance picture */
178			TMstruct *tms,
179			TMbright **lpp,
180			BYTE **cpp,
181			int *xp,
182			int *yp,
183			char *fname,
184			FILE *fp
185			)
186	greg	3.1	{
187			char *funcName = fname==NULL ? "tmLoadPicture" : fname;
188			FILE *inpf;
189			struct radhead info;
190			int err;
191			COLR *scanin = NULL;
192			int i;
193			/* check arguments */
194	greg	3.17	if (tms == NULL)
195	greg	3.1	returnErr(TM_E_TMINVAL);
196	schorsch	3.14	if ((lpp == NULL) \| (xp == NULL) \| (yp == NULL) \|
197			((fname == NULL) & (fp == TM_GETFILE)))
198	greg	3.1	returnErr(TM_E_ILLEGAL);
199			xp = yp = 0; /* error precaution */
200			if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "r")) == NULL)
201			returnErr(TM_E_BADFILE);
202	gwlarson	3.6	*lpp = NULL;
203			if (cpp != TM_NOCHROMP) *cpp = NULL;
204	greg	3.1	info = rhdefault; /* get our header */
205	schorsch	3.15	getheader(inpf, headline, &info);
206	schorsch	3.14	if ((info.format == FMTBAD) \| (info.expos <= 0.) \|\|
207	greg	3.1	fgetresolu(xp, yp, inpf) < 0) {
208			err = TM_E_BADFILE; goto done;
209			}
210			if (info.format == FMTUNK) /* assume RGBE format */
211			info.format = FMTRGB;
212			if (info.format == FMTRGB)
213			info.expos /= WHTEFFICACY;
214			else if (info.format == FMTCIE)
215			info.primp = TM_XYZPRIM;
216			/* prepare library */
217	greg	3.17	if ((err = tmSetSpace(tms, info.primp, 1./info.expos)) != TM_E_OK)
218	greg	3.1	goto done;
219			err = TM_E_NOMEM; /* allocate arrays */
220			lpp = (TMbright )malloc(sizeof(TMbright) * xp *yp);
221			if (*lpp == NULL)
222			goto done;
223			if (cpp != TM_NOCHROMP) {
224			cpp = (BYTE )malloc(3sizeof(BYTE) xp *yp);
225			if (*cpp == NULL)
226			goto done;
227			}
228			scanin = (COLR )malloc(sizeof(COLR) *xp);
229			if (scanin == NULL)
230			goto done;
231			err = TM_E_BADFILE; /* read & convert scanlines */
232			for (i = 0; i < *yp; i++) {
233			if (freadcolrs(scanin, *xp, inpf) < 0) {
234			err = TM_E_BADFILE; break;
235			}
236	greg	3.17	err = tmCvColrs(tms, lpp + (i *xp),
237	greg	3.1	cpp==TM_NOCHROMP ? TM_NOCHROM : cpp + (i 3 * *xp),
238			scanin, *xp);
239			if (err != TM_E_OK)
240			break;
241			}
242			done: /* clean up */
243			if (fp == NULL)
244			fclose(inpf);
245			if (scanin != NULL)
246	gwlarson	3.6	free((MEM_PTR)scanin);
247			if (err != TM_E_OK) {
248			if (*lpp != NULL)
249			free((MEM_PTR)*lpp);
250			if (cpp != TM_NOCHROMP && *cpp != NULL)
251			free((MEM_PTR)*cpp);
252	greg	3.1	returnErr(err);
253	gwlarson	3.6	}
254	greg	3.1	returnOK;
255			}
256
257
258	gwlarson	3.9	#ifdef PCOND
259	schorsch	3.13	static int /* run pcond to map picture */
260	greg	3.1	dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname)
261			BYTE **psp;
262			int xp, yp;
263			int flags;
264			RGBPRIMP monpri;
265			double gamval, Lddyn, Ldmax;
266			char *fname;
267			{
268			char *funcName = fname;
269	greg	3.17	TMstruct *tms = NULL;
270	greg	3.10	char cmdbuf[1024];
271	greg	3.1	FILE *infp;
272			register COLR *scan;
273			register BYTE *rp;
274			int y;
275			register int x;
276			/* set up gamma correction */
277			if (setcolrcor(pow, 1./gamval) < 0)
278			returnErr(TM_E_NOMEM);
279			/* create command */
280	gwlarson	3.9	strcpy(cmdbuf, PCOND);
281	greg	3.1	if (flags & TM_F_HCONTR)
282	gwlarson	3.9	strcat(cmdbuf, " -s");
283	greg	3.1	if (flags & TM_F_MESOPIC)
284	gwlarson	3.9	strcat(cmdbuf, " -c");
285	greg	3.1	if (flags & TM_F_LINEAR)
286	gwlarson	3.9	strcat(cmdbuf, " -l");
287	greg	3.1	if (flags & TM_F_ACUITY)
288	gwlarson	3.9	strcat(cmdbuf, " -a");
289	greg	3.1	if (flags & TM_F_VEIL)
290	gwlarson	3.9	strcat(cmdbuf, " -v");
291	greg	3.1	if (flags & TM_F_CWEIGHT)
292	gwlarson	3.9	strcat(cmdbuf, " -w");
293			if (monpri != stdprims)
294			sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f",
295			monpri[RED][CIEX], monpri[RED][CIEY],
296			monpri[GRN][CIEX], monpri[GRN][CIEY],
297			monpri[BLU][CIEX], monpri[BLU][CIEY],
298			monpri[WHT][CIEX], monpri[WHT][CIEY]);
299			sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname);
300	greg	3.1	/* start pcond */
301			if ((infp = popen(cmdbuf, "r")) == NULL)
302			returnErr(TM_E_BADFILE);
303			/* check picture format and size */
304			if (checkheader(infp, COLRFMT, NULL) < 0 \|\|
305			fgetresolu(xp, yp, infp) < 0) {
306			pclose(infp);
307			returnErr(TM_E_BADFILE);
308			}
309			/* allocate arrays */
310	greg	3.2	scan = (COLR )malloc(sizeof(COLR) *xp);
311	greg	3.1	if (flags & TM_F_BW)
312			rp = (BYTE )malloc(sizeof(BYTE) xp *yp);
313			else
314			rp = (BYTE )malloc(3sizeof(BYTE) * xp *yp);
315	schorsch	3.14	if (((*psp = rp) == NULL) \| (scan == NULL)) {
316	greg	3.1	pclose(infp);
317			returnErr(TM_E_NOMEM);
318			}
319			/* read and gamma map file */
320			for (y = 0; y < *yp; y++) {
321			if (freadcolrs(scan, *xp, infp) < 0) {
322			pclose(infp);
323	gwlarson	3.6	free((MEM_PTR)scan);
324			free((MEM_PTR)*psp);
325	greg	3.2	*psp = NULL;
326	greg	3.1	returnErr(TM_E_BADFILE);
327			}
328			colrs_gambs(scan, *xp);
329			if (flags & TM_F_BW)
330			for (x = 0; x < *xp; x++)
331			*rp++ = normbright(scan[x]);
332			else
333			for (x = 0; x < *xp; x++) {
334			*rp++ = scan[x][RED];
335			*rp++ = scan[x][GRN];
336			*rp++ = scan[x][BLU];
337			}
338			}
339	gwlarson	3.6	free((MEM_PTR)scan);
340	greg	3.1	pclose(infp);
341			returnOK;
342			}
343	gwlarson	3.9	#endif
344	greg	3.1
345
346			int /* map a Radiance picture */
347			tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp)
348			BYTE **psp;
349			int xp, yp;
350			int flags;
351			RGBPRIMP monpri;
352			double gamval, Lddyn, Ldmax;
353			char *fname;
354			FILE *fp;
355			{
356			char *funcName = fname==NULL ? "tmMapPicture" : fname;
357	greg	3.17	TMstruct *tms;
358	greg	3.1	BYTE *cp;
359			TMbright *lp;
360			int err;
361			/* check arguments */
362	schorsch	3.14	if ((psp == NULL) \| (xp == NULL) \| (yp == NULL) \| (monpri == NULL) \|
363			((fname == NULL) & (fp == TM_GETFILE)))
364	greg	3.1	returnErr(TM_E_ILLEGAL);
365			/* set defaults */
366			if (gamval < MINGAM) gamval = DEFGAM;
367			if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
368			if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
369			if (flags & TM_F_BW) monpri = stdprims;
370	gwlarson	3.9	#ifdef PCOND
371	greg	3.1	/* check for pcond run */
372			if (fp == TM_GETFILE && flags & TM_F_UNIMPL)
373			return( dopcond(psp, xp, yp, flags,
374			monpri, gamval, Lddyn, Ldmax, fname) );
375	gwlarson	3.9	#endif
376	greg	3.1	/* initialize tone mapping */
377	greg	3.17	if ((tms = tmInit(flags, monpri, gamval)) == NULL)
378	greg	3.1	returnErr(TM_E_NOMEM);
379			/* load & convert picture */
380	greg	3.17	err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
381	greg	3.1	xp, yp, fname, fp);
382			if (err != TM_E_OK) {
383	greg	3.17	tmDone(tms);
384	greg	3.1	return(err);
385			}
386			/* allocate space for result */
387			if (flags & TM_F_BW) {
388			psp = (BYTE )malloc(sizeof(BYTE) * xp *yp);
389	greg	3.2	if (*psp == NULL) {
390	gwlarson	3.6	free((MEM_PTR)lp);
391	greg	3.17	tmDone(tms);
392	greg	3.1	returnErr(TM_E_NOMEM);
393	greg	3.2	}
394	greg	3.1	cp = TM_NOCHROM;
395			} else
396			*psp = cp;
397			/* compute color mapping */
398	greg	3.17	err = tmAddHisto(tms, lp, xp *yp, 1);
399	greg	3.1	if (err != TM_E_OK)
400			goto done;
401	greg	3.17	err = tmComputeMapping(tms, gamval, Lddyn, Ldmax);
402	greg	3.1	if (err != TM_E_OK)
403			goto done;
404			/* map colors */
405	greg	3.17	err = tmMapPixels(tms, psp, lp, cp, xp * *yp);
406	greg	3.1
407			done: /* clean up */
408	gwlarson	3.6	free((MEM_PTR)lp);
409	greg	3.17	tmDone(tms);
410	greg	3.1	if (err != TM_E_OK) { /* free memory on error */
411	gwlarson	3.6	free((MEM_PTR)*psp);
412	greg	3.1	*psp = NULL;
413			returnErr(err);
414			}
415			returnOK;
416	greg	3.3	}
417
418
419			static void
420			colrNewSpace(tms) /* color space changed for tone mapping */
421	greg	3.17	register TMstruct *tms;
422	greg	3.3	{
423			register COLRDATA *cd;
424			double d;
425
426			cd = (COLRDATA *)tms->pd[colrReg];
427			cd->clfb[RED] = 256.*tms->clf[RED] + .5;
428			cd->clfb[GRN] = 256.*tms->clf[GRN] + .5;
429			cd->clfb[BLU] = 256.*tms->clf[BLU] + .5;
430			cd->clfb[EXP] = COLXS;
431			d = TM_BRTSCALE*log(tms->inpsf);
432			cd->inpsfb = d<0. ? d-.5 : d+.5;
433			}
434
435
436			static MEM_PTR
437			colrInit(tms) /* initialize private data for tone mapping */
438	greg	3.17	register TMstruct *tms;
439	greg	3.3	{
440			register COLRDATA *cd;
441			register int i;
442			/* allocate our data */
443			cd = (COLRDATA *)malloc(sizeof(COLRDATA));
444			if (cd == NULL)
445			return(NULL);
446			tms->pd[colrReg] = (MEM_PTR)cd;
447			/* compute gamma table */
448			for (i = GAMTSZ; i--; )
449			cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam);
450			/* compute color and scale factors */
451			colrNewSpace(tms);
452			return((MEM_PTR)cd);
453	greg	3.1	}