src/common/tmapcolrs.c

#ifndef lint
static const char       RCSid[] = "$Id: tmapcolrs.c,v 3.25 2006/05/31 19:27:42 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>

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

#define GAMTSZ  1024

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 */

#define LOGISZ  260
static TMbright logi[LOGISZ];


int
tmCvColrs(                              /* convert RGBE/XYZE colors */
TMstruct        *tms,
TMbright        *ls,
BYTE    *cs,
COLR    *scan,
int     len
)
{
        static const char       funcName[] = "tmCvColrs";
        int     cmon[4];
        register COLRDATA       *cd;
        register int    i, j, li, bi;
        int32   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;
                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--; ) {
                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]*cmon[RED] +
                        cd->clfb[GRN]*cmon[GRN] +
                        cd->clfb[BLU]*cmon[BLU] ;
                if (li >= 0xfff00) 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 = ( (int32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 12;
                cs[3*i  ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
                bi = ( (int32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 12;
                cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
                bi = ( (int32)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 */
        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, "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;
        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;
        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 */
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:	3.26
Committed:	Mon Feb 9 20:48:08 2009 UTC (15 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R0
Changes since 3.25:	+2 -1 lines
Log Message:	Eliminated redefinition of malloc(3)
#	User	Rev	Content
1	greg	3.1	#ifndef lint
2	greg	3.26	static const char RCSid[] = "$Id: tmapcolrs.c,v 3.25 2006/05/31 19:27:42 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	3.1	#include "tmprivat.h"
19			#include "resolu.h"
20	greg	3.21	#ifdef PCOND
21	schorsch	3.16	#include "rtprocess.h"
22	greg	3.10	#endif
23	greg	3.1
24	greg	3.3	#define GAMTSZ 1024
25
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	3.1	#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	greg	3.18	static const char funcName[] = "tmCvColrs";
56	greg	3.21	int cmon[4];
57	greg	3.3	register COLRDATA *cd;
58	greg	3.21	register int i, j, li, bi;
59			int32 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			for (i = 256; i < LOGISZ; i++)
72	greg	3.10	logi[i] = 0;
73			tmMkMesofact();
74	greg	3.1	}
75	greg	3.17	if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL)
76	greg	3.3	returnErr(TM_E_NOMEM);
77	greg	3.1	for (i = len; i--; ) {
78	greg	3.21	if (tmNeedMatrix(tms)) { /* apply color xform */
79			for (j = 3; j--; ) {
80			vl = cd->cmatb[j][RED]*(int32)scan[i][RED] +
81			cd->cmatb[j][GRN]*(int32)scan[i][GRN] +
82			cd->cmatb[j][BLU]*(int32)scan[i][BLU] ;
83			if (vl < 0) cmon[j] = vl/0x10000;
84			else cmon[j] = vl>>16;
85			}
86			cmon[EXP] = scan[i][EXP];
87			} else
88			copycolr(cmon, scan[i]);
89	greg	3.1	/* world luminance */
90	greg	3.21	li = cd->clfb[RED]*cmon[RED] +
91	greg	3.3	cd->clfb[GRN]*cmon[GRN] +
92	greg	3.21	cd->clfb[BLU]*cmon[BLU] ;
93	greg	3.24	if (li >= 0xfff00) li = 255;
94			else li >>= 12;
95	greg	3.22	bi = BRT2SCALE(cmon[EXP]-COLXS) + cd->inpsfb;
96			if (li > 0)
97			bi += logi[li];
98			else {
99			bi += logi[0];
100			li = 1; /* avoid /0 */
101	greg	3.1	}
102			ls[i] = bi;
103			if (cs == TM_NOCHROM) /* no color? */
104			continue;
105			/* mesopic adj. */
106	greg	3.17	if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) {
107	greg	3.21	int pf, sli = normscot(cmon);
108			if (bi < BMESLOWER) {
109	greg	3.1	cmon[RED] = cmon[GRN] = cmon[BLU] = sli;
110	greg	3.21	} else {
111	greg	3.17	if (tms->flags & TM_F_BW)
112	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
113	greg	3.10	pf = tmMesofact[bi-BMESLOWER];
114	greg	3.1	sli *= 256 - pf;
115	greg	3.21	for (j = 3; j--; ) {
116			cmon[j] = sli + pf*cmon[j];
117			if (cmon[j] <= 0) cmon[j] = 0;
118			else cmon[j] >>= 8;
119			}
120	greg	3.1	}
121	greg	3.17	} else if (tms->flags & TM_F_BW) {
122	gwlarson	3.8	cmon[RED] = cmon[GRN] = cmon[BLU] = li;
123	greg	3.21	} else {
124			for (j = 3; j--; )
125			if (cmon[j] < 0) cmon[j] = 0;
126	greg	3.1	}
127	greg	3.24	bi = ( (int32)GAMTSZcd->clfb[RED]cmon[RED]/li ) >> 12;
128	greg	3.3	cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
129	greg	3.24	bi = ( (int32)GAMTSZcd->clfb[GRN]cmon[GRN]/li ) >> 12;
130	greg	3.3	cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
131	greg	3.24	bi = ( (int32)GAMTSZcd->clfb[BLU]cmon[BLU]/li ) >> 12;
132	greg	3.3	cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi];
133	greg	3.1	}
134			returnOK;
135			}
136
137
138			#define FMTRGB 1 /* Input is RGBE */
139			#define FMTCIE 2 /* Input is CIE XYZE */
140			#define FMTUNK 3 /* Input format is unspecified */
141			#define FMTBAD 4 /* Input is not a recognized format */
142
143			static struct radhead {
144			int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */
145			double expos; /* input exposure value */
146			RGBPRIMP primp; /* input primaries */
147			RGBPRIMS mypri; /* custom primaries */
148			} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS};
149
150
151			static int
152	schorsch	3.15	headline( /* grok a header line */
153			register char *s,
154			void *vrh
155			)
156	greg	3.1	{
157			char fmt[32];
158	schorsch	3.15	register struct radhead *rh = vrh;
159	greg	3.1
160			if (formatval(fmt, s)) {
161			if (!strcmp(fmt, COLRFMT))
162			rh->format = FMTRGB;
163			else if (!strcmp(fmt, CIEFMT))
164			rh->format = FMTCIE;
165			else
166			rh->format = FMTBAD;
167	gwlarson	3.7	return(0);
168	greg	3.1	}
169			if (isexpos(s)) {
170			rh->expos *= exposval(s);
171	gwlarson	3.7	return(0);
172	greg	3.1	}
173			if (isprims(s)) {
174			primsval(rh->mypri, s);
175			rh->primp = rh->mypri;
176	gwlarson	3.7	return(0);
177	greg	3.1	}
178	gwlarson	3.7	return(0);
179	greg	3.1	}
180
181
182			int
183	greg	3.17	tmLoadPicture( /* convert Radiance picture */
184			TMstruct *tms,
185			TMbright **lpp,
186			BYTE **cpp,
187			int *xp,
188			int *yp,
189			char *fname,
190			FILE *fp
191			)
192	greg	3.1	{
193			char *funcName = fname==NULL ? "tmLoadPicture" : fname;
194			FILE *inpf;
195			struct radhead info;
196			int err;
197			COLR *scanin = NULL;
198			int i;
199			/* check arguments */
200	greg	3.17	if (tms == NULL)
201	greg	3.1	returnErr(TM_E_TMINVAL);
202	schorsch	3.14	if ((lpp == NULL) \| (xp == NULL) \| (yp == NULL) \|
203			((fname == NULL) & (fp == TM_GETFILE)))
204	greg	3.1	returnErr(TM_E_ILLEGAL);
205			xp = yp = 0; /* error precaution */
206	greg	3.20	if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "rb")) == NULL)
207	greg	3.1	returnErr(TM_E_BADFILE);
208	gwlarson	3.6	*lpp = NULL;
209			if (cpp != TM_NOCHROMP) *cpp = NULL;
210	greg	3.1	info = rhdefault; /* get our header */
211	schorsch	3.15	getheader(inpf, headline, &info);
212	schorsch	3.14	if ((info.format == FMTBAD) \| (info.expos <= 0.) \|\|
213	greg	3.1	fgetresolu(xp, yp, inpf) < 0) {
214			err = TM_E_BADFILE; goto done;
215			}
216			if (info.format == FMTUNK) /* assume RGBE format */
217			info.format = FMTRGB;
218			if (info.format == FMTRGB)
219			info.expos /= WHTEFFICACY;
220			else if (info.format == FMTCIE)
221			info.primp = TM_XYZPRIM;
222			/* prepare library */
223	greg	3.19	if ((err = tmSetSpace(tms, info.primp, 1./info.expos, NULL)) != TM_E_OK)
224	greg	3.1	goto done;
225			err = TM_E_NOMEM; /* allocate arrays */
226			lpp = (TMbright )malloc(sizeof(TMbright) * xp *yp);
227			if (*lpp == NULL)
228			goto done;
229			if (cpp != TM_NOCHROMP) {
230			cpp = (BYTE )malloc(3sizeof(BYTE) xp *yp);
231			if (*cpp == NULL)
232			goto done;
233			}
234			scanin = (COLR )malloc(sizeof(COLR) *xp);
235			if (scanin == NULL)
236			goto done;
237			err = TM_E_BADFILE; /* read & convert scanlines */
238			for (i = 0; i < *yp; i++) {
239			if (freadcolrs(scanin, *xp, inpf) < 0) {
240			err = TM_E_BADFILE; break;
241			}
242	greg	3.17	err = tmCvColrs(tms, lpp + (i *xp),
243	greg	3.1	cpp==TM_NOCHROMP ? TM_NOCHROM : cpp + (i 3 * *xp),
244			scanin, *xp);
245			if (err != TM_E_OK)
246			break;
247			}
248			done: /* clean up */
249			if (fp == NULL)
250			fclose(inpf);
251			if (scanin != NULL)
252	gwlarson	3.6	free((MEM_PTR)scanin);
253			if (err != TM_E_OK) {
254			if (*lpp != NULL)
255			free((MEM_PTR)*lpp);
256			if (cpp != TM_NOCHROMP && *cpp != NULL)
257			free((MEM_PTR)*cpp);
258	greg	3.1	returnErr(err);
259	gwlarson	3.6	}
260	greg	3.1	returnOK;
261			}
262
263
264	gwlarson	3.9	#ifdef PCOND
265	schorsch	3.13	static int /* run pcond to map picture */
266	greg	3.1	dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname)
267			BYTE **psp;
268			int xp, yp;
269			int flags;
270			RGBPRIMP monpri;
271			double gamval, Lddyn, Ldmax;
272			char *fname;
273			{
274			char *funcName = fname;
275	greg	3.17	TMstruct *tms = NULL;
276	greg	3.10	char cmdbuf[1024];
277	greg	3.1	FILE *infp;
278			register COLR *scan;
279			register BYTE *rp;
280			int y;
281			register int x;
282			/* set up gamma correction */
283			if (setcolrcor(pow, 1./gamval) < 0)
284			returnErr(TM_E_NOMEM);
285			/* create command */
286	gwlarson	3.9	strcpy(cmdbuf, PCOND);
287	greg	3.1	if (flags & TM_F_HCONTR)
288	gwlarson	3.9	strcat(cmdbuf, " -s");
289	greg	3.1	if (flags & TM_F_MESOPIC)
290	gwlarson	3.9	strcat(cmdbuf, " -c");
291	greg	3.1	if (flags & TM_F_LINEAR)
292	gwlarson	3.9	strcat(cmdbuf, " -l");
293	greg	3.1	if (flags & TM_F_ACUITY)
294	gwlarson	3.9	strcat(cmdbuf, " -a");
295	greg	3.1	if (flags & TM_F_VEIL)
296	gwlarson	3.9	strcat(cmdbuf, " -v");
297	greg	3.1	if (flags & TM_F_CWEIGHT)
298	gwlarson	3.9	strcat(cmdbuf, " -w");
299			if (monpri != stdprims)
300			sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f",
301			monpri[RED][CIEX], monpri[RED][CIEY],
302			monpri[GRN][CIEX], monpri[GRN][CIEY],
303			monpri[BLU][CIEX], monpri[BLU][CIEY],
304			monpri[WHT][CIEX], monpri[WHT][CIEY]);
305			sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname);
306	greg	3.1	/* start pcond */
307			if ((infp = popen(cmdbuf, "r")) == NULL)
308			returnErr(TM_E_BADFILE);
309			/* check picture format and size */
310			if (checkheader(infp, COLRFMT, NULL) < 0 \|\|
311			fgetresolu(xp, yp, infp) < 0) {
312			pclose(infp);
313			returnErr(TM_E_BADFILE);
314			}
315			/* allocate arrays */
316	greg	3.2	scan = (COLR )malloc(sizeof(COLR) *xp);
317	greg	3.1	if (flags & TM_F_BW)
318			rp = (BYTE )malloc(sizeof(BYTE) xp *yp);
319			else
320			rp = (BYTE )malloc(3sizeof(BYTE) * xp *yp);
321	schorsch	3.14	if (((*psp = rp) == NULL) \| (scan == NULL)) {
322	greg	3.1	pclose(infp);
323			returnErr(TM_E_NOMEM);
324			}
325			/* read and gamma map file */
326			for (y = 0; y < *yp; y++) {
327			if (freadcolrs(scan, *xp, infp) < 0) {
328			pclose(infp);
329	gwlarson	3.6	free((MEM_PTR)scan);
330			free((MEM_PTR)*psp);
331	greg	3.2	*psp = NULL;
332	greg	3.1	returnErr(TM_E_BADFILE);
333			}
334			colrs_gambs(scan, *xp);
335			if (flags & TM_F_BW)
336			for (x = 0; x < *xp; x++)
337			*rp++ = normbright(scan[x]);
338			else
339			for (x = 0; x < *xp; x++) {
340			*rp++ = scan[x][RED];
341			*rp++ = scan[x][GRN];
342			*rp++ = scan[x][BLU];
343			}
344			}
345	gwlarson	3.6	free((MEM_PTR)scan);
346	greg	3.1	pclose(infp);
347			returnOK;
348			}
349	gwlarson	3.9	#endif
350	greg	3.1
351
352			int /* map a Radiance picture */
353			tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp)
354			BYTE **psp;
355			int xp, yp;
356			int flags;
357			RGBPRIMP monpri;
358			double gamval, Lddyn, Ldmax;
359			char *fname;
360			FILE *fp;
361			{
362			char *funcName = fname==NULL ? "tmMapPicture" : fname;
363	greg	3.17	TMstruct *tms;
364	greg	3.1	BYTE *cp;
365			TMbright *lp;
366			int err;
367			/* check arguments */
368	schorsch	3.14	if ((psp == NULL) \| (xp == NULL) \| (yp == NULL) \| (monpri == NULL) \|
369			((fname == NULL) & (fp == TM_GETFILE)))
370	greg	3.1	returnErr(TM_E_ILLEGAL);
371			/* set defaults */
372			if (gamval < MINGAM) gamval = DEFGAM;
373			if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
374			if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
375			if (flags & TM_F_BW) monpri = stdprims;
376	gwlarson	3.9	#ifdef PCOND
377	greg	3.1	/* check for pcond run */
378			if (fp == TM_GETFILE && flags & TM_F_UNIMPL)
379			return( dopcond(psp, xp, yp, flags,
380			monpri, gamval, Lddyn, Ldmax, fname) );
381	gwlarson	3.9	#endif
382	greg	3.1	/* initialize tone mapping */
383	greg	3.17	if ((tms = tmInit(flags, monpri, gamval)) == NULL)
384	greg	3.1	returnErr(TM_E_NOMEM);
385			/* load & convert picture */
386	greg	3.17	err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp,
387	greg	3.1	xp, yp, fname, fp);
388			if (err != TM_E_OK) {
389	greg	3.17	tmDone(tms);
390	greg	3.1	return(err);
391			}
392			/* allocate space for result */
393			if (flags & TM_F_BW) {
394			psp = (BYTE )malloc(sizeof(BYTE) * xp *yp);
395	greg	3.2	if (*psp == NULL) {
396	gwlarson	3.6	free((MEM_PTR)lp);
397	greg	3.17	tmDone(tms);
398	greg	3.1	returnErr(TM_E_NOMEM);
399	greg	3.2	}
400	greg	3.1	cp = TM_NOCHROM;
401			} else
402			*psp = cp;
403			/* compute color mapping */
404	greg	3.17	err = tmAddHisto(tms, lp, xp *yp, 1);
405	greg	3.1	if (err != TM_E_OK)
406			goto done;
407	greg	3.17	err = tmComputeMapping(tms, gamval, Lddyn, Ldmax);
408	greg	3.1	if (err != TM_E_OK)
409			goto done;
410			/* map colors */
411	greg	3.17	err = tmMapPixels(tms, psp, lp, cp, xp * *yp);
412	greg	3.1
413			done: /* clean up */
414	gwlarson	3.6	free((MEM_PTR)lp);
415	greg	3.17	tmDone(tms);
416	greg	3.1	if (err != TM_E_OK) { /* free memory on error */
417	gwlarson	3.6	free((MEM_PTR)*psp);
418	greg	3.1	*psp = NULL;
419			returnErr(err);
420			}
421			returnOK;
422	greg	3.3	}
423
424
425			static void
426			colrNewSpace(tms) /* color space changed for tone mapping */
427	greg	3.17	register TMstruct *tms;
428	greg	3.3	{
429			register COLRDATA *cd;
430			double d;
431	greg	3.21	int i, j;
432	greg	3.3
433			cd = (COLRDATA *)tms->pd[colrReg];
434	greg	3.21	for (i = 3; i--; )
435	greg	3.24	cd->clfb[i] = 0x1000*tms->clf[i] + .5;
436	greg	3.23	cd->inpsfb = tmCvLuminance(tms->inpsf);
437	greg	3.21	for (i = 3; i--; )
438			for (j = 3; j--; ) {
439			d = tms->cmat[i][j] / tms->inpsf;
440			cd->cmatb[i][j] = 0x10000*d + (d<0. ? -.5 : .5);
441			}
442	greg	3.3	}
443
444
445			static MEM_PTR
446			colrInit(tms) /* initialize private data for tone mapping */
447	greg	3.17	register TMstruct *tms;
448	greg	3.3	{
449			register COLRDATA *cd;
450			register int i;
451			/* allocate our data */
452			cd = (COLRDATA *)malloc(sizeof(COLRDATA));
453			if (cd == NULL)
454			return(NULL);
455			tms->pd[colrReg] = (MEM_PTR)cd;
456			/* compute gamma table */
457			for (i = GAMTSZ; i--; )
458			cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam);
459			/* compute color and scale factors */
460			colrNewSpace(tms);
461			return((MEM_PTR)cd);
462	greg	3.1	}