src/common/tmapcolrs.c

#ifndef lint
static const char       RCSid[] = "$Id: tmapcolrs.c,v 3.32 2018/08/02 18:33:42 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        "paths.h"
#endif
#include        "tmprivat.h"
#include        "rtio.h"
#include        "resolu.h"

#define GAMTSZ  4096

typedef struct {
        uby8            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,
uby8    *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[MAXFMTLEN];
        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,
uby8    **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 = (uby8 *)malloc(3*sizeof(uby8) * *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)
uby8    **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;
        uby8    *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 = (uby8 *)malloc(sizeof(uby8) * *xp * *yp);
        else
                rp = (uby8 *)malloc(3*sizeof(uby8) * *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)
uby8    **psp;
int     *xp, *yp;
int     flags;
RGBPRIMP        monpri;
double  gamval, Lddyn, Ldmax;
char    *fname;
FILE    *fp;
{
        char    *funcName = fname==NULL ? "tmMapPicture" : fname;
        TMstruct        *tms = NULL;
        uby8    *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 = (uby8 *)malloc(sizeof(uby8) * *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:	3.33
Committed:	Fri Jul 19 17:37:56 2019 UTC (4 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 3.32:	+2 -1 lines
Log Message:	Moved declarations and definitions for header.c from resolu.h to rtio.h
#	User	Rev	Content
1	greg	3.1	#ifndef lint
2	greg	3.33	static const char RCSid[] = "$Id: tmapcolrs.c,v 3.32 2018/08/02 18:33:42 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	greg	3.31	#include "paths.h"
20	greg	3.10	#endif
21	greg	3.27	#include "tmprivat.h"
22	greg	3.33	#include "rtio.h"
23	greg	3.27	#include "resolu.h"
24	greg	3.1
25	greg	3.28	#define GAMTSZ 4096
26	greg	3.3
27			typedef struct {
28	greg	3.29	uby8 gamb[GAMTSZ]; /* gamma lookup table */
29	greg	3.21	int clfb[3]; /* encoded tm->clf */
30			int32 cmatb[3][3]; /* encoded color transform */
31	greg	3.3	TMbright inpsfb; /* encoded tm->inpsf */
32			} COLRDATA;
33
34	greg	3.17	static MEM_PTR colrInit(TMstruct *);
35			static void colrNewSpace(TMstruct *);
36	schorsch	3.15	static gethfunc headline;
37
38	greg	3.3	static struct tmPackage colrPkg = { /* our package functions */
39			colrInit, colrNewSpace, free
40			};
41			static int colrReg = -1; /* our package registration number */
42
43	greg	3.28	static TMbright logi[256];
44	greg	3.1
45
46			int
47	greg	3.17	tmCvColrs( /* convert RGBE/XYZE colors */
48			TMstruct *tms,
49			TMbright *ls,
50	greg	3.29	uby8 *cs,
51	greg	3.17	COLR *scan,
52			int len
53			)
54	greg	3.1	{
55	greg	3.18	static const char funcName[] = "tmCvColrs";
56	greg	3.21	int cmon[4];
57	greg	3.28	COLRDATA *cd;
58			int i, j, bi;
59			int32 li, vl;
60	greg	3.1
61	greg	3.17	if (tms == NULL)
62	greg	3.1	returnErr(TM_E_TMINVAL);
63	schorsch	3.14	if ((ls == NULL) \| (scan == NULL) \| (len < 0))
64	greg	3.1	returnErr(TM_E_ILLEGAL);
65	gwlarson	3.6	if (colrReg < 0) { /* build tables if necessary */
66	greg	3.3	colrReg = tmRegPkg(&colrPkg);
67			if (colrReg < 0)
68			returnErr(TM_E_CODERR1);
69	greg	3.1	for (i = 256; i--; )
70			logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5;
71	greg	3.10	tmMkMesofact();
72	greg	3.1	}
73	greg	3.17	if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL)
74	greg	3.3	returnErr(TM_E_NOMEM);
75	greg	3.1	for (i = len; i--; ) {
76	greg	3.21	if (tmNeedMatrix(tms)) { /* apply color xform */
77			for (j = 3; j--; ) {
78			vl = cd->cmatb[j][RED]*(int32)scan[i][RED] +
79			cd->cmatb[j][GRN]*(int32)scan[i][GRN] +
80			cd->cmatb[j][BLU]*(int32)scan[i][BLU] ;
81			if (vl < 0) cmon[j] = vl/0x10000;
82			else cmon[j] = vl>>16;
83			}
84			cmon[EXP] = scan[i][EXP];
85			} else
86			copycolr(cmon, scan[i]);
87	greg	3.1	/* world luminance */
88	greg	3.28	li = cd->clfb[RED]*(int32)cmon[RED] +
89			cd->clfb[GRN]*(int32)cmon[GRN] +
90			cd->clfb[BLU]*(int32)cmon[BLU] ;
91			if (li >= 1L<<(12+8)) li = 255;
92	greg	3.24	else li >>= 12;
93	greg	3.22	bi = BRT2SCALE(cmon[EXP]-COLXS) + cd->inpsfb;
94			if (li > 0)
95			bi += logi[li];
96			else {
97			bi += logi[0];
98			li = 1; /* avoid /0 */
99	greg	3.1	}
100			ls[i] = bi;
101			if (cs == TM_NOCHROM) /* no color? */
102			continue;
103			/* mesopic adj. */
104	greg	3.17	if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) {
105	greg	3.21	int pf, sli = normscot(cmon);
106			if (bi < BMESLOWER) {
107	greg	3.1	cmon[RED] = cmon[GRN] = cmon[BLU] = sli;
108	greg	3.21	} else {
109	greg	3.17	if (tms->flags & TM_F_BW)
110	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
111	greg	3.10	pf = tmMesofact[bi-BMESLOWER];
112	greg	3.1	sli *= 256 - pf;
113	greg	3.21	for (j = 3; j--; ) {
114			cmon[j] = sli + pf*cmon[j];
115			if (cmon[j] <= 0) cmon[j] = 0;
116			else cmon[j] >>= 8;
117			}
118	greg	3.1	}
119	greg	3.17	} else if (tms->flags & TM_F_BW) {
120	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
121	greg	3.21	} else {
122			for (j = 3; j--; )
123			if (cmon[j] < 0) cmon[j] = 0;
124	greg	3.1	}
125	greg	3.28	bi = ( (uint32)GAMTSZcd->clfb[RED]cmon[RED]/li ) >> 12;
126	greg	3.3	cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
127	greg	3.28	bi = ( (uint32)GAMTSZcd->clfb[GRN]cmon[GRN]/li ) >> 12;
128	greg	3.3	cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
129	greg	3.28	bi = ( (uint32)GAMTSZcd->clfb[BLU]cmon[BLU]/li ) >> 12;
130	greg	3.3	cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
131	greg	3.1	}
132			returnOK;
133			}
134
135
136			#define FMTRGB 1 /* Input is RGBE */
137			#define FMTCIE 2 /* Input is CIE XYZE */
138			#define FMTUNK 3 /* Input format is unspecified */
139			#define FMTBAD 4 /* Input is not a recognized format */
140
141			static struct radhead {
142			int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */
143			double expos; /* input exposure value */
144			RGBPRIMP primp; /* input primaries */
145			RGBPRIMS mypri; /* custom primaries */
146			} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS};
147
148
149			static int
150	schorsch	3.15	headline( /* grok a header line */
151	greg	3.28	char *s,
152	schorsch	3.15	void *vrh
153			)
154	greg	3.1	{
155	greg	3.32	char fmt[MAXFMTLEN];
156	greg	3.28	struct radhead *rh = vrh;
157	greg	3.1
158			if (formatval(fmt, s)) {
159			if (!strcmp(fmt, COLRFMT))
160			rh->format = FMTRGB;
161			else if (!strcmp(fmt, CIEFMT))
162			rh->format = FMTCIE;
163			else
164			rh->format = FMTBAD;
165	gwlarson	3.7	return(0);
166	greg	3.1	}
167			if (isexpos(s)) {
168			rh->expos *= exposval(s);
169	gwlarson	3.7	return(0);
170	greg	3.1	}
171			if (isprims(s)) {
172			primsval(rh->mypri, s);
173			rh->primp = rh->mypri;
174	gwlarson	3.7	return(0);
175	greg	3.1	}
176	gwlarson	3.7	return(0);
177	greg	3.1	}
178
179
180			int
181	greg	3.17	tmLoadPicture( /* convert Radiance picture */
182			TMstruct *tms,
183			TMbright **lpp,
184	greg	3.29	uby8 **cpp,
185	greg	3.17	int *xp,
186			int *yp,
187			char *fname,
188			FILE *fp
189			)
190	greg	3.1	{
191			char *funcName = fname==NULL ? "tmLoadPicture" : fname;
192			FILE *inpf;
193			struct radhead info;
194			int err;
195			COLR *scanin = NULL;
196			int i;
197			/* check arguments */
198	greg	3.17	if (tms == NULL)
199	greg	3.1	returnErr(TM_E_TMINVAL);
200	schorsch	3.14	if ((lpp == NULL) \| (xp == NULL) \| (yp == NULL) \|
201			((fname == NULL) & (fp == TM_GETFILE)))
202	greg	3.1	returnErr(TM_E_ILLEGAL);
203			xp = yp = 0; /* error precaution */
204	greg	3.20	if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "rb")) == NULL)
205	greg	3.1	returnErr(TM_E_BADFILE);
206	gwlarson	3.6	*lpp = NULL;
207			if (cpp != TM_NOCHROMP) *cpp = NULL;
208	greg	3.1	info = rhdefault; /* get our header */
209	schorsch	3.15	getheader(inpf, headline, &info);
210	schorsch	3.14	if ((info.format == FMTBAD) \| (info.expos <= 0.) \|\|
211	greg	3.1	fgetresolu(xp, yp, inpf) < 0) {
212			err = TM_E_BADFILE; goto done;
213			}
214			if (info.format == FMTUNK) /* assume RGBE format */
215			info.format = FMTRGB;
216			if (info.format == FMTRGB)
217			info.expos /= WHTEFFICACY;
218			else if (info.format == FMTCIE)
219			info.primp = TM_XYZPRIM;
220			/* prepare library */
221	greg	3.19	if ((err = tmSetSpace(tms, info.primp, 1./info.expos, NULL)) != TM_E_OK)
222	greg	3.1	goto done;
223			err = TM_E_NOMEM; /* allocate arrays */
224			lpp = (TMbright )malloc(sizeof(TMbright) * xp *yp);
225			if (*lpp == NULL)
226			goto done;
227			if (cpp != TM_NOCHROMP) {
228	greg	3.29	cpp = (uby8 )malloc(3sizeof(uby8) xp *yp);
229	greg	3.1	if (*cpp == NULL)
230			goto done;
231			}
232			scanin = (COLR )malloc(sizeof(COLR) *xp);
233			if (scanin == NULL)
234			goto done;
235			err = TM_E_BADFILE; /* read & convert scanlines */
236			for (i = 0; i < *yp; i++) {
237			if (freadcolrs(scanin, *xp, inpf) < 0) {
238			err = TM_E_BADFILE; break;
239			}
240	greg	3.17	err = tmCvColrs(tms, lpp + (i *xp),
241	greg	3.1	cpp==TM_NOCHROMP ? TM_NOCHROM : cpp + (i 3 * *xp),
242			scanin, *xp);
243			if (err != TM_E_OK)
244			break;
245			}
246			done: /* clean up */
247			if (fp == NULL)
248			fclose(inpf);
249			if (scanin != NULL)
250	gwlarson	3.6	free((MEM_PTR)scanin);
251			if (err != TM_E_OK) {
252			if (*lpp != NULL)
253			free((MEM_PTR)*lpp);
254			if (cpp != TM_NOCHROMP && *cpp != NULL)
255			free((MEM_PTR)*cpp);
256	greg	3.1	returnErr(err);
257	gwlarson	3.6	}
258	greg	3.1	returnOK;
259			}
260
261
262	gwlarson	3.9	#ifdef PCOND
263	schorsch	3.13	static int /* run pcond to map picture */
264	greg	3.1	dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname)
265	greg	3.29	uby8 **psp;
266	greg	3.1	int xp, yp;
267			int flags;
268			RGBPRIMP monpri;
269			double gamval, Lddyn, Ldmax;
270			char *fname;
271			{
272			char *funcName = fname;
273	greg	3.17	TMstruct *tms = NULL;
274	greg	3.10	char cmdbuf[1024];
275	greg	3.1	FILE *infp;
276	greg	3.28	COLR *scan;
277	greg	3.29	uby8 *rp;
278	greg	3.1	int y;
279	greg	3.28	int x;
280	greg	3.1	/* set up gamma correction */
281			if (setcolrcor(pow, 1./gamval) < 0)
282			returnErr(TM_E_NOMEM);
283			/* create command */
284	gwlarson	3.9	strcpy(cmdbuf, PCOND);
285	greg	3.1	if (flags & TM_F_HCONTR)
286	gwlarson	3.9	strcat(cmdbuf, " -s");
287	greg	3.1	if (flags & TM_F_MESOPIC)
288	gwlarson	3.9	strcat(cmdbuf, " -c");
289	greg	3.1	if (flags & TM_F_LINEAR)
290	gwlarson	3.9	strcat(cmdbuf, " -l");
291	greg	3.1	if (flags & TM_F_ACUITY)
292	gwlarson	3.9	strcat(cmdbuf, " -a");
293	greg	3.1	if (flags & TM_F_VEIL)
294	gwlarson	3.9	strcat(cmdbuf, " -v");
295	greg	3.1	if (flags & TM_F_CWEIGHT)
296	gwlarson	3.9	strcat(cmdbuf, " -w");
297			if (monpri != stdprims)
298			sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f",
299			monpri[RED][CIEX], monpri[RED][CIEY],
300			monpri[GRN][CIEX], monpri[GRN][CIEY],
301			monpri[BLU][CIEX], monpri[BLU][CIEY],
302			monpri[WHT][CIEX], monpri[WHT][CIEY]);
303			sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname);
304	greg	3.1	/* start pcond */
305			if ((infp = popen(cmdbuf, "r")) == NULL)
306			returnErr(TM_E_BADFILE);
307			/* check picture format and size */
308			if (checkheader(infp, COLRFMT, NULL) < 0 \|\|
309			fgetresolu(xp, yp, infp) < 0) {
310			pclose(infp);
311			returnErr(TM_E_BADFILE);
312			}
313			/* allocate arrays */
314	greg	3.2	scan = (COLR )malloc(sizeof(COLR) *xp);
315	greg	3.1	if (flags & TM_F_BW)
316	greg	3.29	rp = (uby8 )malloc(sizeof(uby8) xp *yp);
317	greg	3.1	else
318	greg	3.29	rp = (uby8 )malloc(3sizeof(uby8) * xp *yp);
319	schorsch	3.14	if (((*psp = rp) == NULL) \| (scan == NULL)) {
320	greg	3.1	pclose(infp);
321			returnErr(TM_E_NOMEM);
322			}
323			/* read and gamma map file */
324			for (y = 0; y < *yp; y++) {
325			if (freadcolrs(scan, *xp, infp) < 0) {
326			pclose(infp);
327	gwlarson	3.6	free((MEM_PTR)scan);
328			free((MEM_PTR)*psp);
329	greg	3.2	*psp = NULL;
330	greg	3.1	returnErr(TM_E_BADFILE);
331			}
332			colrs_gambs(scan, *xp);
333			if (flags & TM_F_BW)
334			for (x = 0; x < *xp; x++)
335			*rp++ = normbright(scan[x]);
336			else
337			for (x = 0; x < *xp; x++) {
338			*rp++ = scan[x][RED];
339			*rp++ = scan[x][GRN];
340			*rp++ = scan[x][BLU];
341			}
342			}
343	gwlarson	3.6	free((MEM_PTR)scan);
344	greg	3.1	pclose(infp);
345			returnOK;
346			}
347	gwlarson	3.9	#endif
348	greg	3.1
349
350			int /* map a Radiance picture */
351			tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp)
352	greg	3.29	uby8 **psp;
353	greg	3.1	int xp, yp;
354			int flags;
355			RGBPRIMP monpri;
356			double gamval, Lddyn, Ldmax;
357			char *fname;
358			FILE *fp;
359			{
360			char *funcName = fname==NULL ? "tmMapPicture" : fname;
361	greg	3.30	TMstruct *tms = NULL;
362	greg	3.29	uby8 *cp;
363	greg	3.1	TMbright *lp;
364			int err;
365			/* check arguments */
366	schorsch	3.14	if ((psp == NULL) \| (xp == NULL) \| (yp == NULL) \| (monpri == NULL) \|
367			((fname == NULL) & (fp == TM_GETFILE)))
368	greg	3.1	returnErr(TM_E_ILLEGAL);
369			/* set defaults */
370			if (gamval < MINGAM) gamval = DEFGAM;
371			if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
372			if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
373			if (flags & TM_F_BW) monpri = stdprims;
374	gwlarson	3.9	#ifdef PCOND
375	greg	3.1	/* check for pcond run */
376			if (fp == TM_GETFILE && flags & TM_F_UNIMPL)
377			return( dopcond(psp, xp, yp, flags,
378			monpri, gamval, Lddyn, Ldmax, fname) );
379	gwlarson	3.9	#endif
380	greg	3.1	/* initialize tone mapping */
381	greg	3.17	if ((tms = tmInit(flags, monpri, gamval)) == NULL)
382	greg	3.1	returnErr(TM_E_NOMEM);
383			/* load & convert picture */
384	greg	3.17	err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
385	greg	3.1	xp, yp, fname, fp);
386			if (err != TM_E_OK) {
387	greg	3.17	tmDone(tms);
388	greg	3.1	return(err);
389			}
390			/* allocate space for result */
391			if (flags & TM_F_BW) {
392	greg	3.29	psp = (uby8 )malloc(sizeof(uby8) * xp *yp);
393	greg	3.2	if (*psp == NULL) {
394	gwlarson	3.6	free((MEM_PTR)lp);
395	greg	3.17	tmDone(tms);
396	greg	3.1	returnErr(TM_E_NOMEM);
397	greg	3.2	}
398	greg	3.1	cp = TM_NOCHROM;
399			} else
400			*psp = cp;
401			/* compute color mapping */
402	greg	3.17	err = tmAddHisto(tms, lp, xp *yp, 1);
403	greg	3.1	if (err != TM_E_OK)
404			goto done;
405	greg	3.17	err = tmComputeMapping(tms, gamval, Lddyn, Ldmax);
406	greg	3.1	if (err != TM_E_OK)
407			goto done;
408			/* map colors */
409	greg	3.17	err = tmMapPixels(tms, psp, lp, cp, xp * *yp);
410	greg	3.1
411			done: /* clean up */
412	gwlarson	3.6	free((MEM_PTR)lp);
413	greg	3.17	tmDone(tms);
414	greg	3.1	if (err != TM_E_OK) { /* free memory on error */
415	gwlarson	3.6	free((MEM_PTR)*psp);
416	greg	3.1	*psp = NULL;
417			returnErr(err);
418			}
419			returnOK;
420	greg	3.3	}
421
422
423			static void
424			colrNewSpace(tms) /* color space changed for tone mapping */
425	greg	3.28	TMstruct *tms;
426	greg	3.3	{
427	greg	3.28	COLRDATA *cd;
428	greg	3.3	double d;
429	greg	3.21	int i, j;
430	greg	3.3
431			cd = (COLRDATA *)tms->pd[colrReg];
432	greg	3.21	for (i = 3; i--; )
433	greg	3.24	cd->clfb[i] = 0x1000*tms->clf[i] + .5;
434	greg	3.23	cd->inpsfb = tmCvLuminance(tms->inpsf);
435	greg	3.21	for (i = 3; i--; )
436			for (j = 3; j--; ) {
437			d = tms->cmat[i][j] / tms->inpsf;
438			cd->cmatb[i][j] = 0x10000*d + (d<0. ? -.5 : .5);
439			}
440	greg	3.3	}
441
442
443			static MEM_PTR
444			colrInit(tms) /* initialize private data for tone mapping */
445	greg	3.28	TMstruct *tms;
446	greg	3.3	{
447	greg	3.28	COLRDATA *cd;
448			int i;
449	greg	3.3	/* allocate our data */
450			cd = (COLRDATA *)malloc(sizeof(COLRDATA));
451			if (cd == NULL)
452			return(NULL);
453			tms->pd[colrReg] = (MEM_PTR)cd;
454			/* compute gamma table */
455			for (i = GAMTSZ; i--; )
456			cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam);
457			/* compute color and scale factors */
458			colrNewSpace(tms);
459			return((MEM_PTR)cd);
460	greg	3.1	}