src/px/pcond.c

#ifndef lint
static const char       RCSid[] = "$Id: pcond.c,v 3.23 2004/11/14 22:19:50 greg Exp $";
#endif
/*
 * Condition Radiance picture for display/output
 *  Added white-balance adjustment 10/01 (GW).
 */

#include "platform.h"
#include "paths.h"
#include "rtprocess.h"
#include "pcond.h"


#define LDMAX           100             /* default max. display luminance */
#define LDDYN           32              /* default dynamic range */

int     what2do = 0;                    /* desired adjustments */

double  ldmax = LDMAX;                  /* maximum output luminance */
double  lddyn = LDDYN;                  /* display dynamic range */
double  Bldmin, Bldmax;                 /* Bl(ldmax/lddyn) and Bl(ldmax) */

char    *progname;                      /* global argv[0] */

char    *infn;                          /* input file name */
FILE    *infp;                          /* input stream */
FILE    *mapfp = NULL;                  /* tone-mapping function stream */
VIEW    ourview = STDVIEW;              /* picture view */
int     gotview = 0;                    /* picture has view */
double  pixaspect = 1.0;                /* pixel aspect ratio */
double  fixfrac = 0.;                   /* histogram share due to fixations */
RESOLU  inpres;                         /* input picture resolution */

COLOR   *fovimg;                        /* foveal (1 degree) averaged image */
int     fvxr, fvyr;                     /* foveal image resolution */
float   *crfimg;                        /* contrast reduction factors */
short   (*fixlst)[2];                   /* fixation history list */
int     nfixations;                     /* number of fixation points */
double  bwhist[HISTRES];                /* luminance histogram */
double  histot;                         /* total count of histogram */
double  bwmin, bwmax;                   /* histogram limits */
double  bwavg;                          /* mean brightness */

double  scalef = 0.;                    /* linear scaling factor */

static gethfunc headline;
static void getahead(void);
static void mapimage(void);
static void getfovimg(void);
static void check2do(void);


int
main(
        int     argc,
        char    *argv[]
)
{
        static RGBPRIMS outprimS;
        int     i;
#define bool(flg)               switch (argv[i][2]) { \
                                case '\0': what2do ^= flg; break; \
                                case 'y': case 'Y': case 't': case 'T': \
                                case '+': case '1': what2do |= flg; break; \
                                case 'n': case 'N': case 'f': case 'F': \
                                case '-': case '0': what2do &= ~(flg); break; \
                                default: goto userr; }

        progname = argv[0];

        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'h':
                        bool(DO_HUMAN);
                        break;
                case 'a':
                        bool(DO_ACUITY);
                        break;
                case 'v':
                        bool(DO_VEIL);
                        break;
                case 's':
                        bool(DO_HSENS);
                        break;
                case 'c':
                        bool(DO_COLOR);
                        break;
                case 'w':
                        bool(DO_CWEIGHT);
                        break;
                case 'i':
                        if (i+1 >= argc) goto userr;
                        fixfrac = atof(argv[++i]);
                        if (fixfrac > FTINY) what2do |= DO_FIXHIST;
                        else what2do &= ~DO_FIXHIST;
                        break;
                case 'I':
                        bool(DO_PREHIST);
                        break;
                case 'l':
                        bool(DO_LINEAR);
                        break;
                case 'p':
                        if (i+8 >= argc) goto userr;
                        outprimS[RED][CIEX] = atof(argv[++i]);
                        outprimS[RED][CIEY] = atof(argv[++i]);
                        outprimS[GRN][CIEX] = atof(argv[++i]);
                        outprimS[GRN][CIEY] = atof(argv[++i]);
                        outprimS[BLU][CIEX] = atof(argv[++i]);
                        outprimS[BLU][CIEY] = atof(argv[++i]);
                        outprimS[WHT][CIEX] = atof(argv[++i]);
                        outprimS[WHT][CIEY] = atof(argv[++i]);
                        outprims = outprimS;
                        break;
                case 'e':
                        if (i+1 >= argc) goto userr;
                        scalef = atof(argv[++i]);
                        if ((argv[i][0] == '+') | (argv[i][0] == '-'))
                                scalef = pow(2.0, scalef);
                        what2do |= DO_LINEAR;
                        break;
                case 'f':
                        if (i+1 >= argc) goto userr;
                        mbcalfile = argv[++i];
                        break;
                case 'm':
                        if (i+1 >= argc) goto userr;
                        cwarpfile = argv[++i];
                        break;
                case 'u':
                        if (i+1 >= argc) goto userr;
                        ldmax = atof(argv[++i]);
                        if (ldmax <= FTINY)
                                goto userr;
                        break;
                case 'd':
                        if (i+1 >= argc) goto userr;
                        lddyn = atof(argv[++i]);
                        break;
                case 'x':
                        if (i+1 >= argc) goto userr;
                        if ((mapfp = fopen(argv[++i], "w")) == NULL) {
                                fprintf(stderr,
                                        "%s: cannot open for writing\n",
                                                argv[i]);
                                exit(1);
                        }
                        break;
                default:
                        goto userr;
                }
        if ((what2do & (DO_FIXHIST|DO_PREHIST)) == (DO_FIXHIST|DO_PREHIST)) {
                fprintf(stderr, "%s: only one of -i or -I option\n", progname);
                exit(1);
        }
        if ((mbcalfile != NULL) + (cwarpfile != NULL) +
                        (outprims != stdprims) > 1) {
                fprintf(stderr,
                        "%s: only one of -p, -m or -f option supported\n",
                                progname);
                exit(1);
        }
        if ((outprims == stdprims) & (inprims != stdprims))
                outprims = inprims;
        Bldmin = Bl(ldmax/lddyn);
        Bldmax = Bl(ldmax);
        if (i >= argc || i+2 < argc)
                goto userr;
                                        /* open input file */
        if ((infp = fopen(infn=argv[i], "r")) == NULL)
                syserror(infn);
                                        /* open output file */
        if (i+2 == argc && freopen(argv[i+1], "w", stdout) == NULL)
                syserror(argv[i+1]);
        SET_FILE_BINARY(infp);
        SET_FILE_BINARY(stdout);
        getahead();                     /* load input header */
        printargs(argc, argv, stdout);  /* add to output header */
        if ((mbcalfile == NULL) & (outprims != stdprims))
                fputprims(outprims, stdout);
        if ((what2do & (DO_PREHIST|DO_VEIL|DO_ACUITY)) != DO_PREHIST)
                getfovimg();            /* get foveal sample image? */
        if (what2do&DO_PREHIST)         /* get histogram? */
                gethisto(stdin);
        else if (what2do&DO_FIXHIST)    /* get fixation history? */
                getfixations(stdin);
        mapimage();                     /* map the picture */
        if (mapfp != NULL)              /* write out basic mapping */
                putmapping(mapfp);
        exit(0);
userr:
        fprintf(stderr, "Usage: %s [-{h|a|v|s|c|l|w}[+-]][-I|-i ffrac][-e ev][-p xr yr xg yg xb yb xw yw|-f mbf.cal|-m rgb.cwp][-u Ldmax][-d Lddyn][-x mapfile] inpic [outpic]\n",
                        progname);
        exit(1);
        return 1; /* pro forma return */
#undef bool
}


extern void
syserror(                               /* report system error and exit */
        char    *s
)
{
        fprintf(stderr, "%s: ", progname);
        perror(s);
        exit(2);
}


static int
headline(                               /* process header line */
        char    *s,
        void    *p
)
{
        static RGBPRIMS inprimS;
        char    fmt[32];

        if (formatval(fmt, s)) {        /* check if format string */
                if (!strcmp(fmt,COLRFMT)) lumf = rgblum;
                else if (!strcmp(fmt,CIEFMT)) lumf = cielum;
                else lumf = NULL;
                return(0);              /* don't echo */
        }
        if (isprims(s)) {               /* get input primaries */
                primsval(inprimS, s);
                inprims= inprimS;
                return(0);              /* don't echo */
        }
        if (isexpos(s)) {               /* picture exposure */
                inpexp *= exposval(s);
                return(0);              /* don't echo */
        }
        if (isaspect(s))                /* pixel aspect ratio */
                pixaspect *= aspectval(s);
        if (isview(s))                  /* image view */
                gotview += sscanview(&ourview, s);
        return(fputs(s, stdout));
}


static void
getahead(void)                  /* load picture header */
{
        char    *err;

        getheader(infp, headline, NULL);
        if (lumf == NULL || !fgetsresolu(&inpres, infp)) {
                fprintf(stderr, "%s: %s: not a Radiance picture\n",
                        progname, infn);
                exit(1);
        }
        if (lumf == rgblum)
                comprgb2xyzWBmat(inrgb2xyz, inprims);
        else if (mbcalfile != NULL) {
                fprintf(stderr, "%s: macbethcal only works with RGB pictures\n",
                                progname);
                exit(1);
        }
        if (!gotview || ourview.type == VT_PAR ||
                        (ourview.horiz <= 5.) | (ourview.vert <= 5.)) {
                ourview = stdview;
                ourview.type = VT_PER;
                if (pixaspect*inpres.yr < inpres.xr) {
                        ourview.horiz = 40.0;
                        ourview.vert = 2.*180./PI *
                                atan(.3639702*pixaspect*inpres.yr/inpres.xr);
                } else {
                        ourview.vert = 40.0;
                        ourview.horiz = 2.*180./PI *
                                atan(.3639702*inpres.xr/pixaspect/inpres.yr);
                }
        }
        if ((err = setview(&ourview)) != NULL) {
                fprintf(stderr, "%s: view error in picture \"%s\": %s\n",
                        progname, infn, err);
                exit(1);
        }
}


static void
mapimage(void)                          /* map picture and send to stdout */
{
        COLOR   *scan;

        comphist();                     /* generate adaptation histogram */
        check2do();                     /* modify what2do flags */
        if (what2do&DO_VEIL)
                compveil();             /* compute veil image */
        if (!(what2do&DO_LINEAR))
                if (mkbrmap() < 0)      /* make tone map */
                        what2do |= DO_LINEAR;   /* failed! -- use linear */
#if ADJ_VEIL
                else if (what2do&DO_VEIL)
                        adjveil();      /* else adjust veil image */
#endif
        if (what2do&DO_LINEAR) {
                if (scalef <= FTINY) {
                        if (what2do&DO_HSENS)
                                scalef = htcontrs(Lb(0.5*(Bldmax+Bldmin))) /
                                                htcontrs(Lb(bwavg));
                        else
                                scalef = Lb(0.5*(Bldmax+Bldmin)) / Lb(bwavg);
                        scalef *= WHTEFFICACY/(inpexp*ldmax);
                }
                fputexpos(inpexp*scalef, stdout);       /* record exposure */
                if (lumf == cielum) scalef /= WHTEFFICACY;
        }
        fputformat(COLRFMT, stdout);    /* complete header */
        putchar('\n');
        fputsresolu(&inpres, stdout);   /* resolution doesn't change */
                                        /* condition our image */
        for (scan = firstscan(); scan != NULL; scan = nextscan())
                if (fwritescan(scan, scanlen(&inpres), stdout) < 0) {
                        fprintf(stderr, "%s: scanline write error\n",
                                        progname);
                        exit(1);
                }
}


static void
getfovimg(void)                 /* load foveal sampled image */
{
        char    combuf[PATH_MAX];
        FILE    *fp;
        int     x, y;
                                                /* compute image size */
        fvxr = sqrt(ourview.hn2)/FOVDIA + 0.5;
        if (fvxr < 2) fvxr = 2;
        fvyr = sqrt(ourview.vn2)/FOVDIA + 0.5;
        if (fvyr < 2) fvyr = 2;
        if (!(inpres.rt & YMAJOR)) {            /* picture is rotated? */
                y = fvyr;
                fvyr = fvxr;
                fvxr = y;
        }
        if ((fovimg = (COLOR *)malloc(fvxr*fvyr*sizeof(COLOR))) == NULL)
                syserror("malloc");
        sprintf(combuf, "pfilt -1 -b -pa 0 -x %d -y %d \"%s\"", fvxr, fvyr, infn);
        if ((fp = popen(combuf, "r")) == NULL)
                syserror("popen");
        getheader(fp, NULL, NULL);      /* skip header */
        if (fgetresolu(&x, &y, fp) < 0 || (x != fvxr) | (y != fvyr))
                goto readerr;
        for (y = 0; y < fvyr; y++)
                if (freadscan(fovscan(y), fvxr, fp) < 0)
                        goto readerr;
        pclose(fp);
        return;
readerr:
        fprintf(stderr, "%s: error reading from pfilt process in fovimage\n",
                        progname);
        exit(1);
}


static void
check2do(void)          /* check histogram to see what isn't worth doing */
{
        double  sum;
        double  b, l;
        register int    i;

                                        /* check for within display range */
        if (bwmax - bwmin <= Bldmax - Bldmin)
                what2do |= DO_LINEAR;
                                        /* determine if veiling significant */
        if (bwmax - bwmin < 4.5)                /* heuristic */
                what2do &= ~DO_VEIL;

        if (!(what2do & (DO_ACUITY|DO_COLOR)))
                return;
                                        /* find 5th percentile */
        sum = histot*0.05;
        for (i = 0; i < HISTRES; i++)
                if ((sum -= bwhist[i]) <= 0)
                        break;
        b = (i+.5)*(bwmax-bwmin)/HISTRES + bwmin;
        l = Lb(b);
                                        /* determine if acuity adj. useful */
        if (what2do&DO_ACUITY &&
                        hacuity(l) >= (inpres.xr/sqrt(ourview.hn2) +
                        inpres.yr/sqrt(ourview.vn2))/(2.*180./PI))
                what2do &= ~DO_ACUITY;
                                        /* color sensitivity loss? */
        if (l >= TopMesopic)
                what2do &= ~DO_COLOR;
}
Revision:	3.24
Committed:	Wed Jun 7 17:52:04 2006 UTC (17 years, 10 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2, rad4R1, rad4R0, rad3R8, rad3R9, rad4R2P1
Changes since 3.23:	+2 -2 lines
Log Message:	Eliminated some compiler warnings.
#	User	Rev	Content
1	greg	3.1	#ifndef lint
2	schorsch	3.24	static const char RCSid[] = "$Id: pcond.c,v 3.23 2004/11/14 22:19:50 greg Exp $";
3	greg	3.1	#endif
4			/*
5			* Condition Radiance picture for display/output
6	greg	3.14	* Added white-balance adjustment 10/01 (GW).
7	greg	3.1	*/
8
9	schorsch	3.15	#include "platform.h"
10	schorsch	3.19	#include "paths.h"
11	schorsch	3.18	#include "rtprocess.h"
12	greg	3.1	#include "pcond.h"
13
14
15			#define LDMAX 100 /* default max. display luminance */
16	greg	3.11	#define LDDYN 32 /* default dynamic range */
17	greg	3.1
18			int what2do = 0; /* desired adjustments */
19
20			double ldmax = LDMAX; /* maximum output luminance */
21	greg	3.11	double lddyn = LDDYN; /* display dynamic range */
22			double Bldmin, Bldmax; /* Bl(ldmax/lddyn) and Bl(ldmax) */
23	greg	3.1
24			char progname; / global argv[0] */
25
26			char infn; / input file name */
27			FILE infp; / input stream */
28	greg	3.6	FILE mapfp = NULL; / tone-mapping function stream */
29	greg	3.1	VIEW ourview = STDVIEW; /* picture view */
30			int gotview = 0; /* picture has view */
31			double pixaspect = 1.0; /* pixel aspect ratio */
32	greg	3.9	double fixfrac = 0.; /* histogram share due to fixations */
33	greg	3.1	RESOLU inpres; /* input picture resolution */
34
35			COLOR fovimg; / foveal (1 degree) averaged image */
36	greg	3.14	int fvxr, fvyr; /* foveal image resolution */
37			float crfimg; / contrast reduction factors */
38	greg	3.9	short (fixlst)[2]; / fixation history list */
39			int nfixations; /* number of fixation points */
40	greg	3.14	double bwhist[HISTRES]; /* luminance histogram */
41	greg	3.8	double histot; /* total count of histogram */
42	greg	3.1	double bwmin, bwmax; /* histogram limits */
43			double bwavg; /* mean brightness */
44
45			double scalef = 0.; /* linear scaling factor */
46
47	schorsch	3.20	static gethfunc headline;
48	schorsch	3.21	static void getahead(void);
49			static void mapimage(void);
50			static void getfovimg(void);
51			static void check2do(void);
52	schorsch	3.20
53	greg	3.1
54	schorsch	3.21
55			int
56			main(
57			int argc,
58			char *argv[]
59			)
60	greg	3.1	{
61			static RGBPRIMS outprimS;
62			int i;
63			#define bool(flg) switch (argv[i][2]) { \
64			case '\0': what2do ^= flg; break; \
65			case 'y': case 'Y': case 't': case 'T': \
66			case '+': case '1': what2do \|= flg; break; \
67			case 'n': case 'N': case 'f': case 'F': \
68			case '-': case '0': what2do &= ~(flg); break; \
69			default: goto userr; }
70
71			progname = argv[0];
72
73			for (i = 1; i < argc && argv[i][0] == '-'; i++)
74			switch (argv[i][1]) {
75			case 'h':
76			bool(DO_HUMAN);
77			break;
78			case 'a':
79			bool(DO_ACUITY);
80			break;
81			case 'v':
82			bool(DO_VEIL);
83			break;
84			case 's':
85			bool(DO_HSENS);
86			break;
87			case 'c':
88			bool(DO_COLOR);
89			break;
90			case 'w':
91			bool(DO_CWEIGHT);
92			break;
93	greg	3.9	case 'i':
94			if (i+1 >= argc) goto userr;
95			fixfrac = atof(argv[++i]);
96			if (fixfrac > FTINY) what2do \|= DO_FIXHIST;
97			else what2do &= ~DO_FIXHIST;
98			break;
99	gwlarson	3.12	case 'I':
100			bool(DO_PREHIST);
101			break;
102	greg	3.1	case 'l':
103			bool(DO_LINEAR);
104			break;
105			case 'p':
106			if (i+8 >= argc) goto userr;
107			outprimS[RED][CIEX] = atof(argv[++i]);
108			outprimS[RED][CIEY] = atof(argv[++i]);
109			outprimS[GRN][CIEX] = atof(argv[++i]);
110			outprimS[GRN][CIEY] = atof(argv[++i]);
111			outprimS[BLU][CIEX] = atof(argv[++i]);
112			outprimS[BLU][CIEY] = atof(argv[++i]);
113			outprimS[WHT][CIEX] = atof(argv[++i]);
114			outprimS[WHT][CIEY] = atof(argv[++i]);
115			outprims = outprimS;
116			break;
117			case 'e':
118			if (i+1 >= argc) goto userr;
119			scalef = atof(argv[++i]);
120	schorsch	3.17	if ((argv[i][0] == '+') \| (argv[i][0] == '-'))
121	greg	3.1	scalef = pow(2.0, scalef);
122			what2do \|= DO_LINEAR;
123			break;
124			case 'f':
125			if (i+1 >= argc) goto userr;
126			mbcalfile = argv[++i];
127			break;
128	greg	3.10	case 'm':
129			if (i+1 >= argc) goto userr;
130			cwarpfile = argv[++i];
131			break;
132	greg	3.11	case 'u':
133	greg	3.1	if (i+1 >= argc) goto userr;
134			ldmax = atof(argv[++i]);
135			if (ldmax <= FTINY)
136			goto userr;
137			break;
138	greg	3.11	case 'd':
139	greg	3.1	if (i+1 >= argc) goto userr;
140	greg	3.11	lddyn = atof(argv[++i]);
141	greg	3.1	break;
142	greg	3.11	case 'x':
143	greg	3.6	if (i+1 >= argc) goto userr;
144			if ((mapfp = fopen(argv[++i], "w")) == NULL) {
145			fprintf(stderr,
146			"%s: cannot open for writing\n",
147			argv[i]);
148			exit(1);
149			}
150			break;
151	greg	3.1	default:
152			goto userr;
153			}
154	gwlarson	3.12	if ((what2do & (DO_FIXHIST\|DO_PREHIST)) == (DO_FIXHIST\|DO_PREHIST)) {
155			fprintf(stderr, "%s: only one of -i or -I option\n", progname);
156			exit(1);
157			}
158	greg	3.10	if ((mbcalfile != NULL) + (cwarpfile != NULL) +
159			(outprims != stdprims) > 1) {
160			fprintf(stderr,
161			"%s: only one of -p, -m or -f option supported\n",
162	greg	3.1	progname);
163			exit(1);
164			}
165	schorsch	3.17	if ((outprims == stdprims) & (inprims != stdprims))
166	greg	3.1	outprims = inprims;
167	greg	3.11	Bldmin = Bl(ldmax/lddyn);
168	greg	3.1	Bldmax = Bl(ldmax);
169			if (i >= argc \|\| i+2 < argc)
170			goto userr;
171	greg	3.9	/* open input file */
172	greg	3.1	if ((infp = fopen(infn=argv[i], "r")) == NULL)
173			syserror(infn);
174	greg	3.9	/* open output file */
175	greg	3.1	if (i+2 == argc && freopen(argv[i+1], "w", stdout) == NULL)
176			syserror(argv[i+1]);
177	schorsch	3.15	SET_FILE_BINARY(infp);
178			SET_FILE_BINARY(stdout);
179	greg	3.1	getahead(); /* load input header */
180			printargs(argc, argv, stdout); /* add to output header */
181	schorsch	3.17	if ((mbcalfile == NULL) & (outprims != stdprims))
182	greg	3.1	fputprims(outprims, stdout);
183	gwlarson	3.12	if ((what2do & (DO_PREHIST\|DO_VEIL\|DO_ACUITY)) != DO_PREHIST)
184			getfovimg(); /* get foveal sample image? */
185			if (what2do&DO_PREHIST) /* get histogram? */
186			gethisto(stdin);
187			else if (what2do&DO_FIXHIST) /* get fixation history? */
188	greg	3.9	getfixations(stdin);
189	greg	3.1	mapimage(); /* map the picture */
190	greg	3.6	if (mapfp != NULL) /* write out basic mapping */
191			putmapping(mapfp);
192	greg	3.1	exit(0);
193			userr:
194	gwlarson	3.12	fprintf(stderr, "Usage: %s [-{h\|a\|v\|s\|c\|l\|w}[+-]][-I\|-i ffrac][-e ev][-p xr yr xg yg xb yb xw yw\|-f mbf.cal\|-m rgb.cwp][-u Ldmax][-d Lddyn][-x mapfile] inpic [outpic]\n",
195	greg	3.1	progname);
196			exit(1);
197	schorsch	3.21	return 1; /* pro forma return */
198	greg	3.1	#undef bool
199			}
200
201
202	schorsch	3.21	extern void
203			syserror( /* report system error and exit */
204			char *s
205			)
206	greg	3.1	{
207			fprintf(stderr, "%s: ", progname);
208			perror(s);
209			exit(2);
210			}
211
212
213	schorsch	3.20	static int
214			headline( /* process header line */
215			char *s,
216			void *p
217			)
218	greg	3.1	{
219			static RGBPRIMS inprimS;
220			char fmt[32];
221
222			if (formatval(fmt, s)) { /* check if format string */
223			if (!strcmp(fmt,COLRFMT)) lumf = rgblum;
224			else if (!strcmp(fmt,CIEFMT)) lumf = cielum;
225			else lumf = NULL;
226	gwlarson	3.13	return(0); /* don't echo */
227	greg	3.1	}
228			if (isprims(s)) { /* get input primaries */
229			primsval(inprimS, s);
230			inprims= inprimS;
231	gwlarson	3.13	return(0); /* don't echo */
232	greg	3.1	}
233			if (isexpos(s)) { /* picture exposure */
234			inpexp *= exposval(s);
235	gwlarson	3.13	return(0); /* don't echo */
236	greg	3.1	}
237			if (isaspect(s)) /* pixel aspect ratio */
238			pixaspect *= aspectval(s);
239			if (isview(s)) /* image view */
240			gotview += sscanview(&ourview, s);
241	gwlarson	3.13	return(fputs(s, stdout));
242	greg	3.1	}
243
244
245	schorsch	3.21	static void
246			getahead(void) /* load picture header */
247	greg	3.1	{
248			char *err;
249
250			getheader(infp, headline, NULL);
251			if (lumf == NULL \|\| !fgetsresolu(&inpres, infp)) {
252			fprintf(stderr, "%s: %s: not a Radiance picture\n",
253			progname, infn);
254			exit(1);
255			}
256			if (lumf == rgblum)
257	greg	3.14	comprgb2xyzWBmat(inrgb2xyz, inprims);
258	greg	3.1	else if (mbcalfile != NULL) {
259			fprintf(stderr, "%s: macbethcal only works with RGB pictures\n",
260			progname);
261			exit(1);
262			}
263	greg	3.22	if (!gotview \|\| ourview.type == VT_PAR \|\|
264	schorsch	3.24	(ourview.horiz <= 5.) \| (ourview.vert <= 5.)) {
265	schorsch	3.16	ourview = stdview;
266	greg	3.1	ourview.type = VT_PER;
267			if (pixaspect*inpres.yr < inpres.xr) {
268			ourview.horiz = 40.0;
269			ourview.vert = 2.180./PI
270			atan(.3639702pixaspectinpres.yr/inpres.xr);
271			} else {
272			ourview.vert = 40.0;
273			ourview.horiz = 2.180./PI
274			atan(.3639702*inpres.xr/pixaspect/inpres.yr);
275			}
276			}
277			if ((err = setview(&ourview)) != NULL) {
278			fprintf(stderr, "%s: view error in picture \"%s\": %s\n",
279			progname, infn, err);
280			exit(1);
281			}
282			}
283
284
285	schorsch	3.21	static void
286			mapimage(void) /* map picture and send to stdout */
287	greg	3.1	{
288			COLOR *scan;
289
290	greg	3.8	comphist(); /* generate adaptation histogram */
291	greg	3.1	check2do(); /* modify what2do flags */
292	greg	3.9	if (what2do&DO_VEIL)
293	greg	3.14	compveil(); /* compute veil image */
294			if (!(what2do&DO_LINEAR))
295			if (mkbrmap() < 0) /* make tone map */
296			what2do \|= DO_LINEAR; /* failed! -- use linear */
297			#if ADJ_VEIL
298			else if (what2do&DO_VEIL)
299			adjveil(); /* else adjust veil image */
300			#endif
301	greg	3.1	if (what2do&DO_LINEAR) {
302			if (scalef <= FTINY) {
303			if (what2do&DO_HSENS)
304			scalef = htcontrs(Lb(0.5*(Bldmax+Bldmin))) /
305			htcontrs(Lb(bwavg));
306			else
307			scalef = Lb(0.5*(Bldmax+Bldmin)) / Lb(bwavg);
308			scalef = WHTEFFICACY/(inpexpldmax);
309			}
310	greg	3.4	fputexpos(inpexpscalef, stdout); / record exposure */
311	greg	3.1	if (lumf == cielum) scalef /= WHTEFFICACY;
312			}
313	greg	3.9	fputformat(COLRFMT, stdout); /* complete header */
314			putchar('\n');
315	greg	3.1	fputsresolu(&inpres, stdout); /* resolution doesn't change */
316	greg	3.9	/* condition our image */
317	greg	3.1	for (scan = firstscan(); scan != NULL; scan = nextscan())
318			if (fwritescan(scan, scanlen(&inpres), stdout) < 0) {
319			fprintf(stderr, "%s: scanline write error\n",
320			progname);
321			exit(1);
322			}
323			}
324
325
326	schorsch	3.21	static void
327			getfovimg(void) /* load foveal sampled image */
328	greg	3.1	{
329	schorsch	3.19	char combuf[PATH_MAX];
330	greg	3.1	FILE *fp;
331			int x, y;
332	greg	3.8	/* compute image size */
333	greg	3.1	fvxr = sqrt(ourview.hn2)/FOVDIA + 0.5;
334			if (fvxr < 2) fvxr = 2;
335			fvyr = sqrt(ourview.vn2)/FOVDIA + 0.5;
336			if (fvyr < 2) fvyr = 2;
337	greg	3.14	if (!(inpres.rt & YMAJOR)) { /* picture is rotated? */
338	greg	3.1	y = fvyr;
339			fvyr = fvxr;
340			fvxr = y;
341			}
342			if ((fovimg = (COLOR )malloc(fvxrfvyr*sizeof(COLOR))) == NULL)
343			syserror("malloc");
344	schorsch	3.19	sprintf(combuf, "pfilt -1 -b -pa 0 -x %d -y %d \"%s\"", fvxr, fvyr, infn);
345	greg	3.1	if ((fp = popen(combuf, "r")) == NULL)
346			syserror("popen");
347			getheader(fp, NULL, NULL); /* skip header */
348	schorsch	3.17	if (fgetresolu(&x, &y, fp) < 0 \|\| (x != fvxr) \| (y != fvyr))
349	greg	3.1	goto readerr;
350			for (y = 0; y < fvyr; y++)
351			if (freadscan(fovscan(y), fvxr, fp) < 0)
352			goto readerr;
353			pclose(fp);
354	greg	3.8	return;
355			readerr:
356			fprintf(stderr, "%s: error reading from pfilt process in fovimage\n",
357			progname);
358			exit(1);
359			}
360
361
362	schorsch	3.21	static void
363			check2do(void) /* check histogram to see what isn't worth doing */
364	greg	3.1	{
365	greg	3.8	double sum;
366	greg	3.1	double b, l;
367			register int i;
368
369			/* check for within display range */
370	greg	3.9	if (bwmax - bwmin <= Bldmax - Bldmin)
371	greg	3.1	what2do \|= DO_LINEAR;
372	greg	3.3	/* determine if veiling significant */
373	greg	3.9	if (bwmax - bwmin < 4.5) /* heuristic */
374	greg	3.3	what2do &= ~DO_VEIL;
375	greg	3.1
376	greg	3.3	if (!(what2do & (DO_ACUITY\|DO_COLOR)))
377	greg	3.1	return;
378			/* find 5th percentile */
379	greg	3.8	sum = histot*0.05;
380	greg	3.1	for (i = 0; i < HISTRES; i++)
381			if ((sum -= bwhist[i]) <= 0)
382			break;
383			b = (i+.5)*(bwmax-bwmin)/HISTRES + bwmin;
384			l = Lb(b);
385			/* determine if acuity adj. useful */
386			if (what2do&DO_ACUITY &&
387			hacuity(l) >= (inpres.xr/sqrt(ourview.hn2) +
388	greg	3.5	inpres.yr/sqrt(ourview.vn2))/(2.*180./PI))
389	greg	3.1	what2do &= ~DO_ACUITY;
390			/* color sensitivity loss? */
391	greg	3.5	if (l >= TopMesopic)
392	greg	3.1	what2do &= ~DO_COLOR;
393			}