src/common/tmapcolrs.c

#ifndef lint
static const char       RCSid[] = "$Id: tmapcolrs.c,v 3.27 2010/12/02 18:10:40 greg Exp $";
#endif
/*
 * Routines for tone mapping on Radiance RGBE and XYZE pictures.
 *
 * Externals declared in tonemap.h
 */

#include "copyright.h"

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

#ifdef PCOND
#include        "rtprocess.h"
#endif
#include        "tmprivat.h"
#include        "resolu.h"

#define GAMTSZ  4096

typedef struct {
        BYTE            gamb[GAMTSZ];   /* gamma lookup table */
        int             clfb[3];        /* encoded tm->clf */
        int32           cmatb[3][3];    /* encoded color transform */
        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 */

static TMbright logi[256];


int
tmCvColrs(                              /* convert RGBE/XYZE colors */
TMstruct        *tms,
TMbright        *ls,
BYTE    *cs,
COLR    *scan,
int     len
)
{
        static const char       funcName[] = "tmCvColrs";
        int     cmon[4];
        COLRDATA        *cd;
        int     i, j, bi;
        int32   li, vl;

        if (tms == NULL)
                returnErr(TM_E_TMINVAL);
        if ((ls == NULL) | (scan == NULL) | (len < 0))
                returnErr(TM_E_ILLEGAL);
        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;
                tmMkMesofact();
        }
        if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL)
                returnErr(TM_E_NOMEM);
        for (i = len; i--; ) {
                if (tmNeedMatrix(tms)) {                /* apply color xform */
                        for (j = 3; j--; ) {
                                vl =    cd->cmatb[j][RED]*(int32)scan[i][RED] +
                                        cd->cmatb[j][GRN]*(int32)scan[i][GRN] +
                                        cd->cmatb[j][BLU]*(int32)scan[i][BLU] ;
                                if (vl < 0) cmon[j] = vl/0x10000;
                                else cmon[j] = vl>>16;
                        }
                        cmon[EXP] = scan[i][EXP];
                } else
                        copycolr(cmon, scan[i]);
                                                        /* world luminance */
                li =    cd->clfb[RED]*(int32)cmon[RED] +
                        cd->clfb[GRN]*(int32)cmon[GRN] +
                        cd->clfb[BLU]*(int32)cmon[BLU] ;
                if (li >= 1L<<(12+8)) li = 255;
                else li >>= 12;
                bi = BRT2SCALE(cmon[EXP]-COLXS) + cd->inpsfb;
                if (li > 0)
                        bi += logi[li];
                else {
                        bi += logi[0];
                        li = 1;                         /* avoid /0 */
                }
                ls[i] = bi;
                if (cs == TM_NOCHROM)                   /* no color? */
                        continue;
                                                        /* mesopic adj. */
                if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) {
                        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;
                                for (j = 3; j--; ) {
                                        cmon[j] = sli + pf*cmon[j];
                                        if (cmon[j] <= 0) cmon[j] = 0;
                                        else cmon[j] >>= 8;
                                }
                        }
                } else if (tms->flags & TM_F_BW) {
                        cmon[RED] = cmon[GRN] = cmon[BLU] = li;
                } else {
                        for (j = 3; j--; )
                                if (cmon[j] < 0) cmon[j] = 0;
                }
                bi = ( (uint32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 12;
                cs[3*i  ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
                bi = ( (uint32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 12;
                cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
                bi = ( (uint32)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 12;
                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 */
        char    *s,
        void    *vrh
)
{
        char    fmt[32];
        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, "rb")) == 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, NULL)) != 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;
        COLR    *scan;
        BYTE    *rp;
        int     y;
        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 */
TMstruct        *tms;
{
        COLRDATA        *cd;
        double  d;
        int     i, j;

        cd = (COLRDATA *)tms->pd[colrReg];
        for (i = 3; i--; )
                cd->clfb[i] = 0x1000*tms->clf[i] + .5;
        cd->inpsfb = tmCvLuminance(tms->inpsf);
        for (i = 3; i--; )
                for (j = 3; j--; ) {
                        d = tms->cmat[i][j] / tms->inpsf;
                        cd->cmatb[i][j] = 0x10000*d + (d<0. ? -.5 : .5);
                }
}


static MEM_PTR
colrInit(tms)                   /* initialize private data for tone mapping */
TMstruct        *tms;
{
        COLRDATA        *cd;
        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:	3.28
Committed:	Fri Apr 22 17:06:26 2011 UTC (14 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 3.27:	+23 -26 lines
Log Message:	Improved accuracy of color for wide-gamut monitor spaces
#	User	Rev	Content
1	greg	3.1	#ifndef lint
2	greg	3.28	static const char RCSid[] = "$Id: tmapcolrs.c,v 3.27 2010/12/02 18:10:40 greg 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	3.26	#include <stdlib.h>
14	greg	3.10	#include <string.h>
15	greg	3.1	#include <math.h>
16	greg	3.10	#include <time.h>
17	schorsch	3.16
18	greg	3.21	#ifdef PCOND
19	schorsch	3.16	#include "rtprocess.h"
20	greg	3.10	#endif
21	greg	3.27	#include "tmprivat.h"
22			#include "resolu.h"
23	greg	3.1
24	greg	3.28	#define GAMTSZ 4096
25	greg	3.3
26			typedef struct {
27			BYTE gamb[GAMTSZ]; /* gamma lookup table */
28	greg	3.21	int clfb[3]; /* encoded tm->clf */
29			int32 cmatb[3][3]; /* encoded color transform */
30	greg	3.3	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	3.28	static TMbright logi[256];
43	greg	3.1
44
45			int
46	greg	3.17	tmCvColrs( /* convert RGBE/XYZE colors */
47			TMstruct *tms,
48			TMbright *ls,
49			BYTE *cs,
50			COLR *scan,
51			int len
52			)
53	greg	3.1	{
54	greg	3.18	static const char funcName[] = "tmCvColrs";
55	greg	3.21	int cmon[4];
56	greg	3.28	COLRDATA *cd;
57			int i, j, bi;
58			int32 li, vl;
59	greg	3.1
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	gwlarson	3.6	if (colrReg < 0) { /* build tables if necessary */
65	greg	3.3	colrReg = tmRegPkg(&colrPkg);
66			if (colrReg < 0)
67			returnErr(TM_E_CODERR1);
68	greg	3.1	for (i = 256; i--; )
69			logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5;
70	greg	3.10	tmMkMesofact();
71	greg	3.1	}
72	greg	3.17	if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL)
73	greg	3.3	returnErr(TM_E_NOMEM);
74	greg	3.1	for (i = len; i--; ) {
75	greg	3.21	if (tmNeedMatrix(tms)) { /* apply color xform */
76			for (j = 3; j--; ) {
77			vl = cd->cmatb[j][RED]*(int32)scan[i][RED] +
78			cd->cmatb[j][GRN]*(int32)scan[i][GRN] +
79			cd->cmatb[j][BLU]*(int32)scan[i][BLU] ;
80			if (vl < 0) cmon[j] = vl/0x10000;
81			else cmon[j] = vl>>16;
82			}
83			cmon[EXP] = scan[i][EXP];
84			} else
85			copycolr(cmon, scan[i]);
86	greg	3.1	/* world luminance */
87	greg	3.28	li = cd->clfb[RED]*(int32)cmon[RED] +
88			cd->clfb[GRN]*(int32)cmon[GRN] +
89			cd->clfb[BLU]*(int32)cmon[BLU] ;
90			if (li >= 1L<<(12+8)) li = 255;
91	greg	3.24	else li >>= 12;
92	greg	3.22	bi = BRT2SCALE(cmon[EXP]-COLXS) + cd->inpsfb;
93			if (li > 0)
94			bi += logi[li];
95			else {
96			bi += logi[0];
97			li = 1; /* avoid /0 */
98	greg	3.1	}
99			ls[i] = bi;
100			if (cs == TM_NOCHROM) /* no color? */
101			continue;
102			/* mesopic adj. */
103	greg	3.17	if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) {
104	greg	3.21	int pf, sli = normscot(cmon);
105			if (bi < BMESLOWER) {
106	greg	3.1	cmon[RED] = cmon[GRN] = cmon[BLU] = sli;
107	greg	3.21	} else {
108	greg	3.17	if (tms->flags & TM_F_BW)
109	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
110	greg	3.10	pf = tmMesofact[bi-BMESLOWER];
111	greg	3.1	sli *= 256 - pf;
112	greg	3.21	for (j = 3; j--; ) {
113			cmon[j] = sli + pf*cmon[j];
114			if (cmon[j] <= 0) cmon[j] = 0;
115			else cmon[j] >>= 8;
116			}
117	greg	3.1	}
118	greg	3.17	} else if (tms->flags & TM_F_BW) {
119	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
120	greg	3.21	} else {
121			for (j = 3; j--; )
122			if (cmon[j] < 0) cmon[j] = 0;
123	greg	3.1	}
124	greg	3.28	bi = ( (uint32)GAMTSZcd->clfb[RED]cmon[RED]/li ) >> 12;
125	greg	3.3	cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
126	greg	3.28	bi = ( (uint32)GAMTSZcd->clfb[GRN]cmon[GRN]/li ) >> 12;
127	greg	3.3	cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
128	greg	3.28	bi = ( (uint32)GAMTSZcd->clfb[BLU]cmon[BLU]/li ) >> 12;
129	greg	3.3	cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
130	greg	3.1	}
131			returnOK;
132			}
133
134
135			#define FMTRGB 1 /* Input is RGBE */
136			#define FMTCIE 2 /* Input is CIE XYZE */
137			#define FMTUNK 3 /* Input format is unspecified */
138			#define FMTBAD 4 /* Input is not a recognized format */
139
140			static struct radhead {
141			int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */
142			double expos; /* input exposure value */
143			RGBPRIMP primp; /* input primaries */
144			RGBPRIMS mypri; /* custom primaries */
145			} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS};
146
147
148			static int
149	schorsch	3.15	headline( /* grok a header line */
150	greg	3.28	char *s,
151	schorsch	3.15	void *vrh
152			)
153	greg	3.1	{
154			char fmt[32];
155	greg	3.28	struct radhead *rh = vrh;
156	greg	3.1
157			if (formatval(fmt, s)) {
158			if (!strcmp(fmt, COLRFMT))
159			rh->format = FMTRGB;
160			else if (!strcmp(fmt, CIEFMT))
161			rh->format = FMTCIE;
162			else
163			rh->format = FMTBAD;
164	gwlarson	3.7	return(0);
165	greg	3.1	}
166			if (isexpos(s)) {
167			rh->expos *= exposval(s);
168	gwlarson	3.7	return(0);
169	greg	3.1	}
170			if (isprims(s)) {
171			primsval(rh->mypri, s);
172			rh->primp = rh->mypri;
173	gwlarson	3.7	return(0);
174	greg	3.1	}
175	gwlarson	3.7	return(0);
176	greg	3.1	}
177
178
179			int
180	greg	3.17	tmLoadPicture( /* convert Radiance picture */
181			TMstruct *tms,
182			TMbright **lpp,
183			BYTE **cpp,
184			int *xp,
185			int *yp,
186			char *fname,
187			FILE *fp
188			)
189	greg	3.1	{
190			char *funcName = fname==NULL ? "tmLoadPicture" : fname;
191			FILE *inpf;
192			struct radhead info;
193			int err;
194			COLR *scanin = NULL;
195			int i;
196			/* check arguments */
197	greg	3.17	if (tms == NULL)
198	greg	3.1	returnErr(TM_E_TMINVAL);
199	schorsch	3.14	if ((lpp == NULL) \| (xp == NULL) \| (yp == NULL) \|
200			((fname == NULL) & (fp == TM_GETFILE)))
201	greg	3.1	returnErr(TM_E_ILLEGAL);
202			xp = yp = 0; /* error precaution */
203	greg	3.20	if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "rb")) == NULL)
204	greg	3.1	returnErr(TM_E_BADFILE);
205	gwlarson	3.6	*lpp = NULL;
206			if (cpp != TM_NOCHROMP) *cpp = NULL;
207	greg	3.1	info = rhdefault; /* get our header */
208	schorsch	3.15	getheader(inpf, headline, &info);
209	schorsch	3.14	if ((info.format == FMTBAD) \| (info.expos <= 0.) \|\|
210	greg	3.1	fgetresolu(xp, yp, inpf) < 0) {
211			err = TM_E_BADFILE; goto done;
212			}
213			if (info.format == FMTUNK) /* assume RGBE format */
214			info.format = FMTRGB;
215			if (info.format == FMTRGB)
216			info.expos /= WHTEFFICACY;
217			else if (info.format == FMTCIE)
218			info.primp = TM_XYZPRIM;
219			/* prepare library */
220	greg	3.19	if ((err = tmSetSpace(tms, info.primp, 1./info.expos, NULL)) != TM_E_OK)
221	greg	3.1	goto done;
222			err = TM_E_NOMEM; /* allocate arrays */
223			lpp = (TMbright )malloc(sizeof(TMbright) * xp *yp);
224			if (*lpp == NULL)
225			goto done;
226			if (cpp != TM_NOCHROMP) {
227			cpp = (BYTE )malloc(3sizeof(BYTE) xp *yp);
228			if (*cpp == NULL)
229			goto done;
230			}
231			scanin = (COLR )malloc(sizeof(COLR) *xp);
232			if (scanin == NULL)
233			goto done;
234			err = TM_E_BADFILE; /* read & convert scanlines */
235			for (i = 0; i < *yp; i++) {
236			if (freadcolrs(scanin, *xp, inpf) < 0) {
237			err = TM_E_BADFILE; break;
238			}
239	greg	3.17	err = tmCvColrs(tms, lpp + (i *xp),
240	greg	3.1	cpp==TM_NOCHROMP ? TM_NOCHROM : cpp + (i 3 * *xp),
241			scanin, *xp);
242			if (err != TM_E_OK)
243			break;
244			}
245			done: /* clean up */
246			if (fp == NULL)
247			fclose(inpf);
248			if (scanin != NULL)
249	gwlarson	3.6	free((MEM_PTR)scanin);
250			if (err != TM_E_OK) {
251			if (*lpp != NULL)
252			free((MEM_PTR)*lpp);
253			if (cpp != TM_NOCHROMP && *cpp != NULL)
254			free((MEM_PTR)*cpp);
255	greg	3.1	returnErr(err);
256	gwlarson	3.6	}
257	greg	3.1	returnOK;
258			}
259
260
261	gwlarson	3.9	#ifdef PCOND
262	schorsch	3.13	static int /* run pcond to map picture */
263	greg	3.1	dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname)
264			BYTE **psp;
265			int xp, yp;
266			int flags;
267			RGBPRIMP monpri;
268			double gamval, Lddyn, Ldmax;
269			char *fname;
270			{
271			char *funcName = fname;
272	greg	3.17	TMstruct *tms = NULL;
273	greg	3.10	char cmdbuf[1024];
274	greg	3.1	FILE *infp;
275	greg	3.28	COLR *scan;
276			BYTE *rp;
277	greg	3.1	int y;
278	greg	3.28	int x;
279	greg	3.1	/* set up gamma correction */
280			if (setcolrcor(pow, 1./gamval) < 0)
281			returnErr(TM_E_NOMEM);
282			/* create command */
283	gwlarson	3.9	strcpy(cmdbuf, PCOND);
284	greg	3.1	if (flags & TM_F_HCONTR)
285	gwlarson	3.9	strcat(cmdbuf, " -s");
286	greg	3.1	if (flags & TM_F_MESOPIC)
287	gwlarson	3.9	strcat(cmdbuf, " -c");
288	greg	3.1	if (flags & TM_F_LINEAR)
289	gwlarson	3.9	strcat(cmdbuf, " -l");
290	greg	3.1	if (flags & TM_F_ACUITY)
291	gwlarson	3.9	strcat(cmdbuf, " -a");
292	greg	3.1	if (flags & TM_F_VEIL)
293	gwlarson	3.9	strcat(cmdbuf, " -v");
294	greg	3.1	if (flags & TM_F_CWEIGHT)
295	gwlarson	3.9	strcat(cmdbuf, " -w");
296			if (monpri != stdprims)
297			sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f",
298			monpri[RED][CIEX], monpri[RED][CIEY],
299			monpri[GRN][CIEX], monpri[GRN][CIEY],
300			monpri[BLU][CIEX], monpri[BLU][CIEY],
301			monpri[WHT][CIEX], monpri[WHT][CIEY]);
302			sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname);
303	greg	3.1	/* start pcond */
304			if ((infp = popen(cmdbuf, "r")) == NULL)
305			returnErr(TM_E_BADFILE);
306			/* check picture format and size */
307			if (checkheader(infp, COLRFMT, NULL) < 0 \|\|
308			fgetresolu(xp, yp, infp) < 0) {
309			pclose(infp);
310			returnErr(TM_E_BADFILE);
311			}
312			/* allocate arrays */
313	greg	3.2	scan = (COLR )malloc(sizeof(COLR) *xp);
314	greg	3.1	if (flags & TM_F_BW)
315			rp = (BYTE )malloc(sizeof(BYTE) xp *yp);
316			else
317			rp = (BYTE )malloc(3sizeof(BYTE) * xp *yp);
318	schorsch	3.14	if (((*psp = rp) == NULL) \| (scan == NULL)) {
319	greg	3.1	pclose(infp);
320			returnErr(TM_E_NOMEM);
321			}
322			/* read and gamma map file */
323			for (y = 0; y < *yp; y++) {
324			if (freadcolrs(scan, *xp, infp) < 0) {
325			pclose(infp);
326	gwlarson	3.6	free((MEM_PTR)scan);
327			free((MEM_PTR)*psp);
328	greg	3.2	*psp = NULL;
329	greg	3.1	returnErr(TM_E_BADFILE);
330			}
331			colrs_gambs(scan, *xp);
332			if (flags & TM_F_BW)
333			for (x = 0; x < *xp; x++)
334			*rp++ = normbright(scan[x]);
335			else
336			for (x = 0; x < *xp; x++) {
337			*rp++ = scan[x][RED];
338			*rp++ = scan[x][GRN];
339			*rp++ = scan[x][BLU];
340			}
341			}
342	gwlarson	3.6	free((MEM_PTR)scan);
343	greg	3.1	pclose(infp);
344			returnOK;
345			}
346	gwlarson	3.9	#endif
347	greg	3.1
348
349			int /* map a Radiance picture */
350			tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp)
351			BYTE **psp;
352			int xp, yp;
353			int flags;
354			RGBPRIMP monpri;
355			double gamval, Lddyn, Ldmax;
356			char *fname;
357			FILE *fp;
358			{
359			char *funcName = fname==NULL ? "tmMapPicture" : fname;
360	greg	3.17	TMstruct *tms;
361	greg	3.1	BYTE *cp;
362			TMbright *lp;
363			int err;
364			/* check arguments */
365	schorsch	3.14	if ((psp == NULL) \| (xp == NULL) \| (yp == NULL) \| (monpri == NULL) \|
366			((fname == NULL) & (fp == TM_GETFILE)))
367	greg	3.1	returnErr(TM_E_ILLEGAL);
368			/* set defaults */
369			if (gamval < MINGAM) gamval = DEFGAM;
370			if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
371			if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
372			if (flags & TM_F_BW) monpri = stdprims;
373	gwlarson	3.9	#ifdef PCOND
374	greg	3.1	/* check for pcond run */
375			if (fp == TM_GETFILE && flags & TM_F_UNIMPL)
376			return( dopcond(psp, xp, yp, flags,
377			monpri, gamval, Lddyn, Ldmax, fname) );
378	gwlarson	3.9	#endif
379	greg	3.1	/* initialize tone mapping */
380	greg	3.17	if ((tms = tmInit(flags, monpri, gamval)) == NULL)
381	greg	3.1	returnErr(TM_E_NOMEM);
382			/* load & convert picture */
383	greg	3.17	err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
384	greg	3.1	xp, yp, fname, fp);
385			if (err != TM_E_OK) {
386	greg	3.17	tmDone(tms);
387	greg	3.1	return(err);
388			}
389			/* allocate space for result */
390			if (flags & TM_F_BW) {
391			psp = (BYTE )malloc(sizeof(BYTE) * xp *yp);
392	greg	3.2	if (*psp == NULL) {
393	gwlarson	3.6	free((MEM_PTR)lp);
394	greg	3.17	tmDone(tms);
395	greg	3.1	returnErr(TM_E_NOMEM);
396	greg	3.2	}
397	greg	3.1	cp = TM_NOCHROM;
398			} else
399			*psp = cp;
400			/* compute color mapping */
401	greg	3.17	err = tmAddHisto(tms, lp, xp *yp, 1);
402	greg	3.1	if (err != TM_E_OK)
403			goto done;
404	greg	3.17	err = tmComputeMapping(tms, gamval, Lddyn, Ldmax);
405	greg	3.1	if (err != TM_E_OK)
406			goto done;
407			/* map colors */
408	greg	3.17	err = tmMapPixels(tms, psp, lp, cp, xp * *yp);
409	greg	3.1
410			done: /* clean up */
411	gwlarson	3.6	free((MEM_PTR)lp);
412	greg	3.17	tmDone(tms);
413	greg	3.1	if (err != TM_E_OK) { /* free memory on error */
414	gwlarson	3.6	free((MEM_PTR)*psp);
415	greg	3.1	*psp = NULL;
416			returnErr(err);
417			}
418			returnOK;
419	greg	3.3	}
420
421
422			static void
423			colrNewSpace(tms) /* color space changed for tone mapping */
424	greg	3.28	TMstruct *tms;
425	greg	3.3	{
426	greg	3.28	COLRDATA *cd;
427	greg	3.3	double d;
428	greg	3.21	int i, j;
429	greg	3.3
430			cd = (COLRDATA *)tms->pd[colrReg];
431	greg	3.21	for (i = 3; i--; )
432	greg	3.24	cd->clfb[i] = 0x1000*tms->clf[i] + .5;
433	greg	3.23	cd->inpsfb = tmCvLuminance(tms->inpsf);
434	greg	3.21	for (i = 3; i--; )
435			for (j = 3; j--; ) {
436			d = tms->cmat[i][j] / tms->inpsf;
437			cd->cmatb[i][j] = 0x10000*d + (d<0. ? -.5 : .5);
438			}
439	greg	3.3	}
440
441
442			static MEM_PTR
443			colrInit(tms) /* initialize private data for tone mapping */
444	greg	3.28	TMstruct *tms;
445	greg	3.3	{
446	greg	3.28	COLRDATA *cd;
447			int i;
448	greg	3.3	/* allocate our data */
449			cd = (COLRDATA *)malloc(sizeof(COLRDATA));
450			if (cd == NULL)
451			return(NULL);
452			tms->pd[colrReg] = (MEM_PTR)cd;
453			/* compute gamma table */
454			for (i = GAMTSZ; i--; )
455			cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam);
456			/* compute color and scale factors */
457			colrNewSpace(tms);
458			return((MEM_PTR)cd);
459	greg	3.1	}