src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.22 2003/02/22 02:07:27 greg Exp $";
#endif
/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

#include "standard.h"
#include "color.h"
#include "calcomp.h"
#include "view.h"

#define MAXINP          32              /* maximum number of input files */
#define WINSIZ          64              /* scanline window size */
#define MIDSCN          ((WINSIZ-1)/2+1)

struct {
        char    *name;          /* file or command name */
        FILE    *fp;            /* stream pointer */
        VIEW    vw;             /* view for picture */
        RESOLU  rs;             /* image resolution and orientation */
        float   pa;             /* pixel aspect ratio */
        COLOR   *scan[WINSIZ];  /* input scanline window */
        COLOR   coef;           /* coefficient */
        COLOR   expos;          /* recorded exposure */
}       input[MAXINP];                  /* input pictures */

int     nfiles;                         /* number of input files */

char    ourfmt[LPICFMT+1] = PICFMT;     /* input picture format */

char    Command[] = "<Command>";
char    vcolin[3][4] = {"ri", "gi", "bi"};
char    vcolout[3][4] = {"ro", "go", "bo"};
char    vbrtin[] = "li";
char    vbrtout[] = "lo";
char    vcolexp[3][4] = {"re", "ge", "be"};
char    vbrtexp[] = "le";
char    vpixaspect[] = "pa";

char    vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};

char    vpsize[] = "S";

char    vnfiles[] = "nfiles";
char    vwhteff[] = "WE";
char    vxmax[] = "xmax";
char    vymax[] = "ymax";
char    vxres[] = "xres";
char    vyres[] = "yres";
char    vxpos[] = "x";
char    vypos[] = "y";

int     nowarn = 0;                     /* no warning messages? */

int     xmax = 0, ymax = 0;             /* input resolution */

int     xscan, yscan;                   /* input position */

int     xres, yres;                     /* output resolution */

int     xpos, ypos;                     /* output position */

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

int     wrongformat = 0;
int     gotview;

FILE    *popen();

extern char     *emalloc();


main(argc, argv)
int     argc;
char    *argv[];
{
        int     original;
        double  f;
        int     a, i;
        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        progname = argv[0];
                                                /* scan options */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                        case 'y':
                                a++;
                                continue;
                        case 'w':
                                nowarn = !nowarn;
                                continue;
                        case 'f':
                        case 'e':
                                a++;
                                continue;
                        }
                break;
        }
        newheader("RADIANCE", stdout);  /* start header */
        fputnow(stdout);
                                        /* process files */
        for (nfiles = 0; nfiles < MAXINP; nfiles++) {
                setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
                setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
                copystruct(&input[nfiles].vw, &stdview);
                input[nfiles].pa = 1.0;
        }
        nfiles = 0;
        original = 0;
        for ( ; a < argc; a++) {
                if (nfiles >= MAXINP) {
                        eputs(argv[0]);
                        eputs(": too many picture files\n");
                        quit(1);
                }
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case '\0':
                                input[nfiles].name = "<stdin>";
                                input[nfiles].fp = stdin;
                                break;
                        case 'o':
                                original++;
                                continue;
                        case 's':
                                f = atof(argv[++a]);
                                scalecolor(input[nfiles].coef, f);
                                continue;
                        case 'c':
                                colval(input[nfiles].coef,RED)*=atof(argv[++a]);
                                colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
                                colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
                                continue;
                        default:
                                goto usage;
                        }
                else {
                        if (argv[a][0] == '!') {
                                input[nfiles].name = Command;
                                input[nfiles].fp = popen(argv[a]+1, "r");
                        } else {
                                input[nfiles].name = argv[a];
                                input[nfiles].fp = fopen(argv[a], "r");
                        }
                        if (input[nfiles].fp == NULL) {
                                perror(argv[a]);
                                quit(1);
                        }
                }
                checkfile();
                if (original) {
                        colval(input[nfiles].coef,RED) /=
                                        colval(input[nfiles].expos,RED);
                        colval(input[nfiles].coef,GRN) /=
                                        colval(input[nfiles].expos,GRN);
                        colval(input[nfiles].coef,BLU) /=
                                        colval(input[nfiles].expos,BLU);
                        setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
                }
                nfiles++;
                original = 0;
        }
        init();                         /* set constants */
                                        /* go back and get expressions */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                                varset(vxres, ':', eval(argv[++a]));
                                continue;
                        case 'y':
                                varset(vyres, ':', eval(argv[++a]));
                                continue;
                        case 'w':
                                continue;
                        case 'f':
                                fcompile(argv[++a]);
                                continue;
                        case 'e':
                                scompile(argv[++a], NULL, 0);
                                continue;
                        }
                break;
        }
                                                /* set/get output resolution */
        if (!vardefined(vxres))
                varset(vxres, ':', (double)xmax);
        if (!vardefined(vyres))
                varset(vyres, ':', (double)ymax);
        xres = varvalue(vxres) + .5;
        yres = varvalue(vyres) + .5;
        if (xres <= 0 || yres <= 0) {
                eputs(argv[0]);
                eputs(": illegal output resolution\n");
                quit(1);
        }
                                                /* complete header */
        printargs(argc, argv, stdout);
        if (strcmp(ourfmt, PICFMT))
                fputformat(ourfmt, stdout);     /* print format if known */
        putchar('\n');
        fprtresolu(xres, yres, stdout);
                                                /* combine pictures */
        combine();
        quit(0);
usage:
        eputs("Usage: ");
        eputs(argv[0]);
        eputs(
" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
        quit(1);
}


tabputs(s)                      /* put out string preceded by a tab */
char    *s;
{
        char    fmt[32];
        double  d;
        COLOR   ctmp;

        if (isheadid(s))                        /* header id */
                return(0);      /* don't echo */
        if (formatval(fmt, s)) {                /* check format */
                if (globmatch(ourfmt, fmt)) {
                        wrongformat = 0;
                        strcpy(ourfmt, fmt);
                } else
                        wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
                return(0);      /* don't echo */
        }
        if (isexpos(s)) {                       /* exposure */
                d = exposval(s);
                scalecolor(input[nfiles].expos, d);
        } else if (iscolcor(s)) {               /* color correction */
                colcorval(ctmp, s);
                multcolor(input[nfiles].expos, ctmp);
        } else if (isaspect(s))
                input[nfiles].pa *= aspectval(s);
        else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
                gotview++;
                                                /* echo line */
        putchar('\t');
        return(fputs(s, stdout));
}


checkfile()                     /* ready a file */
{
        register int    i;
                                        /* process header */
        gotview = 0;
        fputs(input[nfiles].name, stdout);
        fputs(":\n", stdout);
        getheader(input[nfiles].fp, tabputs, NULL);
        if (wrongformat < 0) {
                eputs(input[nfiles].name);
                eputs(": not a Radiance picture\n");
                quit(1);
        }
        if (wrongformat > 0) {
                wputs(input[nfiles].name);
                wputs(": warning -- incompatible picture format\n");
        }
        if (!gotview || setview(&input[nfiles].vw) != NULL)
                input[nfiles].vw.type = 0;
        if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
                eputs(input[nfiles].name);
                eputs(": bad picture size\n");
                quit(1);
        }
        if (xmax == 0 && ymax == 0) {
                xmax = scanlen(&input[nfiles].rs);
                ymax = numscans(&input[nfiles].rs);
        } else if (scanlen(&input[nfiles].rs) != xmax ||
                        numscans(&input[nfiles].rs) != ymax) {
                eputs(input[nfiles].name);
                eputs(": resolution mismatch\n");
                quit(1);
        }
                                        /* allocate scanlines */
        for (i = 0; i < WINSIZ; i++)
                input[nfiles].scan[i] = (COLOR *)emalloc(xmax*sizeof(COLOR));
}


double
rgb_bright(clr)
COLOR  clr;
{
        return(bright(clr));
}


double
xyz_bright(clr)
COLOR  clr;
{
        return(clr[CIEY]);
}


double  (*ourbright)() = rgb_bright;


init()                                  /* perform final setup */
{
        double  l_colin(), l_expos(), l_pixaspect(), l_ray(), l_psize();
        register int    i;
                                                /* define constants */
        varset("PI", ':', PI);
        varset(vnfiles, ':', (double)nfiles);
        varset(vxmax, ':', (double)xmax);
        varset(vymax, ':', (double)ymax);
                                                /* set functions */
        for (i = 0; i < 3; i++) {
                funset(vcolexp[i], 1, ':', l_expos);
                funset(vcolin[i], 1, '=', l_colin);
        }
        funset(vbrtexp, 1, ':', l_expos);
        funset(vbrtin, 1, '=', l_colin);
        funset(vpixaspect, 1, ':', l_pixaspect);
        for (i = 0; i < 7; i++)
                funset(vray[i], 1, '=', l_ray);
        funset(vpsize, 1, '=', l_psize);
                                                /* set brightness function */
        if (!strcmp(ourfmt, CIEFMT)) {
                varset(vwhteff, ':', 1.0);
                ourbright = xyz_bright;
        } else
                varset(vwhteff, ':', WHTEFFICACY);
}


combine()                       /* combine pictures */
{
        EPNODE  *coldef[3], *brtdef;
        COLOR   *scanout;
        double  d;
        register int    i, j;
                                                /* check defined variables */
        for (j = 0; j < 3; j++) {
                if (vardefined(vcolout[j]))
                        coldef[j] = eparse(vcolout[j]);
                else
                        coldef[j] = NULL;
        }
        if (vardefined(vbrtout))
                brtdef = eparse(vbrtout);
        else
                brtdef = NULL;
                                                /* allocate scanline */
        scanout = (COLOR *)emalloc(xres*sizeof(COLOR));
                                                /* set input position */
        yscan = ymax+MIDSCN;
                                                /* combine files */
        for (ypos = yres-1; ypos >= 0; ypos--) {
            advance();
            varset(vypos, '=', (double)ypos);
            for (xpos = 0; xpos < xres; xpos++) {
                xscan = (long)xpos*xmax/xres;
                varset(vxpos, '=', (double)xpos);
                eclock++;
                if (brtdef != NULL) {
                    d = evalue(brtdef);
                    if (d < 0.0)
                        d = 0.0;
                    setcolor(scanout[xpos], d, d, d);
                } else {
                    for (j = 0; j < 3; j++) {
                        if (coldef[j] != NULL) {
                                d = evalue(coldef[j]);
                        } else {
                            d = 0.0;
                            for (i = 0; i < nfiles; i++)
                                d += colval(input[i].scan[MIDSCN][xscan],j);
                        }
                        if (d < 0.0)
                            d = 0.0;
                        colval(scanout[xpos],j) = d;
                    }
                }
            }
            if (fwritescan(scanout, xres, stdout) < 0) {
                    perror("write error");
                    quit(1);
            }
        }
        efree((char *)scanout);
}


advance()                       /* read in data for next scanline */
{
        int     ytarget;
        register COLOR  *st;
        register int    i, j;

        for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
                for (i = 0; i < nfiles; i++) {
                        st = input[i].scan[WINSIZ-1];
                        for (j = WINSIZ-1; j > 0; j--)  /* rotate window */
                                input[i].scan[j] = input[i].scan[j-1];
                        input[i].scan[0] = st;
                        if (yscan <= MIDSCN)            /* hit bottom? */
                                continue;
                        if (freadscan(st, xmax, input[i].fp) < 0) {  /* read */
                                eputs(input[i].name);
                                eputs(": read error\n");
                                quit(1);
                        }
                        if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 ||
                                fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 ||
                                fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
                                for (j = 0; j < xmax; j++)  /* adjust color */
                                        multcolor(st[j], input[i].coef);
                }
}


double
l_expos(nam)                    /* return picture exposure */
register char   *nam;
{
        register int    fn, n;

        fn = argument(1) - .5;
        if (fn < 0 || fn >= nfiles)
                return(1.0);
        if (nam == vbrtexp)
                return((*ourbright)(input[fn].expos));
        n = 3;
        while (n--)
                if (nam == vcolexp[n])
                        return(colval(input[fn].expos,n));
        eputs("Bad call to l_expos()!\n");
        quit(1);
}


double
l_pixaspect()                   /* return pixel aspect ratio */
{
        register int    fn;

        fn = argument(1) - .5;
        if (fn < 0 || fn >= nfiles)
                return(1.0);
        return(input[fn].pa);
}


double
l_colin(nam)                    /* return color value for picture */
register char   *nam;
{
        int     fn;
        register int    n, xoff, yoff;
        double  d;

        fn = argument(1) - .5;
        if (fn < 0 || fn >= nfiles) {
                errno = EDOM;
                return(0.0);
        }
        xoff = yoff = 0;
        n = nargum();
        if (n >= 2) {
                d = argument(2);
                if (d < 0.0) {
                        xoff = d-.5;
                        if (xscan+xoff < 0)
                                xoff = -xscan;
                } else {
                        xoff = d+.5;
                        if (xscan+xoff >= xmax)
                                xoff = xmax-1-xscan;
                }
        }
        if (n >= 3) {
                d = argument(3);
                if (d < 0.0) {
                        yoff = d-.5;
                        if (yoff+MIDSCN < 0)
                                yoff = -MIDSCN;
                        if (yscan+yoff < 0)
                                yoff = -yscan;
                } else {
                        yoff = d+.5;
                        if (yoff+MIDSCN >= WINSIZ)
                                yoff = WINSIZ-1-MIDSCN;
                        if (yscan+yoff >= ymax)
                                yoff = ymax-1-yscan;
                }
        }
        if (nam == vbrtin)
                return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
        n = 3;
        while (n--)
            if (nam == vcolin[n])
                return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
        eputs("Bad call to l_colin()!\n");
        quit(1);
}


double
l_ray(nam)              /* return ray origin or direction */
register char   *nam;
{
        static unsigned long    ltick[MAXINP];
        static FVECT    lorg[MAXINP], ldir[MAXINP];
        static double   ldist[MAXINP];
        FLOAT   loc[2];
        int     fn;
        register int    i;

        fn = argument(1) - .5;
        if (fn < 0 || fn >= nfiles) {
                errno = EDOM;
                return(0.0);
        }
        if (ltick[fn] != eclock) {              /* need to compute? */
                lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
                ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
                ldist[fn] = -1.0;
                if (input[fn].vw.type == 0)
                        errno = EDOM;
                else {
                        pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
                        ldist[fn] = viewray(lorg[fn], ldir[fn],
                                        &input[fn].vw, loc[0], loc[1]);
                }
                ltick[fn] = eclock;
        }
        if (nam == vray[i=6])
                return(ldist[fn]);
        while (i--)
                if (nam == vray[i])
                        return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
        eputs("Bad call to l_ray()!\n");
        quit(1);
}


double
l_psize()                       /* compute pixel size in steradians */
{
        static unsigned long    ltick[MAXINP];
        static double   psize[MAXINP];
        FVECT   dir0, org, dirx, diry;
        FLOAT   locx[2], locy[2];
        double  d;
        int     fn;
        register int    i;

        d = argument(1);
        if (d < .5 || d >= nfiles+.5) {
                errno = EDOM;
                return(0.0);
        }
        fn = d - .5;
        if (ltick[fn] != eclock) {              /* need to compute? */
                psize[fn] = 0.0;
                if (input[fn].vw.type == 0)
                        errno = EDOM;
                else if (input[fn].vw.type != VT_PAR &&
                                funvalue(vray[6], 1, &d) >= 0) {
                        for (i = 0; i < 3; i++)
                                dir0[i] = funvalue(vray[3+i], 1, &d);
                        pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
                        pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
                        if (viewray(org, dirx, &input[fn].vw,
                                        locx[0], locx[1]) >= 0 &&
                                        viewray(org, diry, &input[fn].vw,
                                        locy[0], locy[1]) >= 0) {
                                                /* approximate solid angle */
                                for (i = 0; i < 3; i++) {
                                        dirx[i] -= dir0[i];
                                        diry[i] -= dir0[i];
                                }
                                fcross(dir0, dirx, diry);
                                psize[fn] = sqrt(DOT(dir0,dir0));
                        }
                }
                ltick[fn] = eclock;
        }
        return(psize[fn]);
}


void
wputs(msg)
char    *msg;
{
        if (!nowarn)
                eputs(msg);
}


void
eputs(msg)
char    *msg;
{
        fputs(msg, stderr);
}


void
quit(code)              /* exit gracefully */
int  code;
{
        register int  i;
                                /* close input files */
        for (i = 0; i < nfiles; i++)
                if (input[i].name == Command)
                        pclose(input[i].fp);
                else
                        fclose(input[i].fp);
        exit(code);
}
Revision:	2.23
Committed:	Thu Jun 5 19:29:34 2003 UTC (20 years, 10 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.22:	+4 -10 lines
Log Message:	Macros for setting binary file mode. Replacing MSDOS by _WIN32.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.23	static const char RCSid[] = "$Id: pcomb.c,v 2.22 2003/02/22 02:07:27 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* Combine picture files according to calcomp functions.
6			*
7			* 1/4/89
8			*/
9
10	greg	2.10	#include "standard.h"
11	greg	1.1	#include "color.h"
12			#include "calcomp.h"
13	greg	2.10	#include "view.h"
14
15	greg	1.6	#define MAXINP 32 /* maximum number of input files */
16	greg	2.22	#define WINSIZ 64 /* scanline window size */
17	greg	2.13	#define MIDSCN ((WINSIZ-1)/2+1)
18	greg	1.1
19			struct {
20	greg	1.19	char name; / file or command name */
21	greg	1.1	FILE fp; / stream pointer */
22	greg	2.10	VIEW vw; /* view for picture */
23			RESOLU rs; /* image resolution and orientation */
24	greg	2.17	float pa; /* pixel aspect ratio */
25	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
26	greg	1.3	COLOR coef; /* coefficient */
27	greg	1.17	COLOR expos; /* recorded exposure */
28	greg	1.1	} input[MAXINP]; /* input pictures */
29
30			int nfiles; /* number of input files */
31
32	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
33
34	greg	2.6	char Command[] = "<Command>";
35	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
36			char vcolout[3][4] = {"ro", "go", "bo"};
37	greg	1.15	char vbrtin[] = "li";
38			char vbrtout[] = "lo";
39	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
40	greg	1.17	char vbrtexp[] = "le";
41	greg	2.18	char vpixaspect[] = "pa";
42	greg	1.1
43	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
44	greg	2.10
45	greg	2.17	char vpsize[] = "S";
46
47	greg	1.18	char vnfiles[] = "nfiles";
48	greg	2.18	char vwhteff[] = "WE";
49	greg	1.18	char vxmax[] = "xmax";
50			char vymax[] = "ymax";
51			char vxres[] = "xres";
52			char vyres[] = "yres";
53			char vxpos[] = "x";
54			char vypos[] = "y";
55	greg	1.1
56			int nowarn = 0; /* no warning messages? */
57
58	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
59	greg	1.9
60	greg	1.18	int xscan, yscan; /* input position */
61	greg	1.1
62	greg	1.18	int xres, yres; /* output resolution */
63	greg	1.1
64	greg	1.18	int xpos, ypos; /* output position */
65
66	greg	2.10	char progname; / global argv[0] */
67
68	greg	1.10	int wrongformat = 0;
69	greg	2.10	int gotview;
70	greg	1.1
71	greg	1.19	FILE *popen();
72	greg	1.10
73	greg	2.7	extern char *emalloc();
74	greg	1.19
75	greg	2.7
76	greg	1.1	main(argc, argv)
77			int argc;
78			char *argv[];
79			{
80	greg	1.18	int original;
81	greg	1.3	double f;
82	greg	1.14	int a, i;
83	schorsch	2.23	SET_DEFAULT_BINARY();
84			SET_FILE_BINARY(stdin);
85			SET_FILE_BINARY(stdout);
86	greg	2.10	progname = argv[0];
87	greg	1.15	/* scan options */
88			for (a = 1; a < argc; a++) {
89	greg	1.1	if (argv[a][0] == '-')
90			switch (argv[a][1]) {
91			case 'x':
92			case 'y':
93	greg	1.18	a++;
94	greg	1.15	continue;
95	greg	1.1	case 'w':
96			nowarn = !nowarn;
97	greg	1.15	continue;
98	greg	1.1	case 'f':
99			case 'e':
100	greg	1.16	a++;
101	greg	1.15	continue;
102	greg	1.1	}
103	greg	1.15	break;
104			}
105	greg	2.14	newheader("RADIANCE", stdout); /* start header */
106	greg	2.22	fputnow(stdout);
107	greg	1.15	/* process files */
108	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
109	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
110	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
111	greg	2.10	copystruct(&input[nfiles].vw, &stdview);
112	greg	2.17	input[nfiles].pa = 1.0;
113	greg	1.17	}
114	greg	1.1	nfiles = 0;
115	greg	1.18	original = 0;
116	greg	1.1	for ( ; a < argc; a++) {
117			if (nfiles >= MAXINP) {
118			eputs(argv[0]);
119			eputs(": too many picture files\n");
120			quit(1);
121			}
122	greg	1.3	if (argv[a][0] == '-')
123			switch (argv[a][1]) {
124			case '\0':
125			input[nfiles].name = "<stdin>";
126			input[nfiles].fp = stdin;
127			break;
128	greg	1.17	case 'o':
129			original++;
130	greg	1.22	continue;
131	greg	1.3	case 's':
132			f = atof(argv[++a]);
133			scalecolor(input[nfiles].coef, f);
134			continue;
135			case 'c':
136			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
137			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
138			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
139			continue;
140			default:
141			goto usage;
142			}
143			else {
144	greg	2.2	if (argv[a][0] == '!') {
145	greg	2.6	input[nfiles].name = Command;
146	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
147			} else {
148			input[nfiles].name = argv[a];
149			input[nfiles].fp = fopen(argv[a], "r");
150			}
151	greg	1.1	if (input[nfiles].fp == NULL) {
152	greg	1.6	perror(argv[a]);
153	greg	1.1	quit(1);
154			}
155			}
156	greg	1.16	checkfile();
157	greg	1.18	if (original) {
158			colval(input[nfiles].coef,RED) /=
159			colval(input[nfiles].expos,RED);
160			colval(input[nfiles].coef,GRN) /=
161			colval(input[nfiles].expos,GRN);
162			colval(input[nfiles].coef,BLU) /=
163			colval(input[nfiles].expos,BLU);
164	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
165	greg	1.18	}
166			nfiles++;
167	greg	1.17	original = 0;
168	greg	1.15	}
169	greg	1.18	init(); /* set constants */
170	greg	1.15	/* go back and get expressions */
171			for (a = 1; a < argc; a++) {
172			if (argv[a][0] == '-')
173			switch (argv[a][1]) {
174			case 'x':
175	greg	1.21	varset(vxres, ':', eval(argv[++a]));
176	greg	1.18	continue;
177	greg	1.15	case 'y':
178	greg	1.21	varset(vyres, ':', eval(argv[++a]));
179	greg	1.16	continue;
180	greg	1.15	case 'w':
181			continue;
182			case 'f':
183			fcompile(argv[++a]);
184			continue;
185			case 'e':
186			scompile(argv[++a], NULL, 0);
187			continue;
188			}
189			break;
190			}
191	greg	1.18	/* set/get output resolution */
192			if (!vardefined(vxres))
193			varset(vxres, ':', (double)xmax);
194			if (!vardefined(vyres))
195			varset(vyres, ':', (double)ymax);
196			xres = varvalue(vxres) + .5;
197			yres = varvalue(vyres) + .5;
198			if (xres <= 0 \|\| yres <= 0) {
199			eputs(argv[0]);
200			eputs(": illegal output resolution\n");
201			quit(1);
202			}
203	greg	1.15	/* complete header */
204			printargs(argc, argv, stdout);
205	greg	2.16	if (strcmp(ourfmt, PICFMT))
206			fputformat(ourfmt, stdout); /* print format if known */
207	greg	1.15	putchar('\n');
208	greg	1.23	fprtresolu(xres, yres, stdout);
209	greg	1.15	/* combine pictures */
210			combine();
211			quit(0);
212			usage:
213			eputs("Usage: ");
214			eputs(argv[0]);
215			eputs(
216	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
217	greg	1.15	quit(1);
218			}
219
220
221	greg	2.22	tabputs(s) /* put out string preceded by a tab */
222	greg	1.15	char *s;
223			{
224			char fmt[32];
225			double d;
226			COLOR ctmp;
227
228	greg	2.14	if (isheadid(s)) /* header id */
229	gwlarson	2.21	return(0); /* don't echo */
230	greg	2.14	if (formatval(fmt, s)) { /* check format */
231	greg	2.16	if (globmatch(ourfmt, fmt)) {
232			wrongformat = 0;
233			strcpy(ourfmt, fmt);
234			} else
235	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
236	gwlarson	2.21	return(0); /* don't echo */
237	greg	1.17	}
238			if (isexpos(s)) { /* exposure */
239			d = exposval(s);
240			scalecolor(input[nfiles].expos, d);
241			} else if (iscolcor(s)) { /* color correction */
242	greg	1.15	colcorval(ctmp, s);
243	greg	1.17	multcolor(input[nfiles].expos, ctmp);
244	greg	2.18	} else if (isaspect(s))
245	greg	2.17	input[nfiles].pa *= aspectval(s);
246	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
247	greg	2.10	gotview++;
248	greg	1.17	/* echo line */
249			putchar('\t');
250	gwlarson	2.21	return(fputs(s, stdout));
251	greg	1.16	}
252	greg	1.15
253	greg	1.16
254			checkfile() /* ready a file */
255			{
256			register int i;
257			/* process header */
258	greg	2.10	gotview = 0;
259	greg	1.16	fputs(input[nfiles].name, stdout);
260			fputs(":\n", stdout);
261	greg	2.22	getheader(input[nfiles].fp, tabputs, NULL);
262			if (wrongformat < 0) {
263	greg	1.16	eputs(input[nfiles].name);
264	greg	2.22	eputs(": not a Radiance picture\n");
265	greg	1.16	quit(1);
266			}
267	greg	2.22	if (wrongformat > 0) {
268			wputs(input[nfiles].name);
269			wputs(": warning -- incompatible picture format\n");
270			}
271	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
272			input[nfiles].vw.type = 0;
273			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
274	greg	1.16	eputs(input[nfiles].name);
275			eputs(": bad picture size\n");
276			quit(1);
277			}
278	greg	1.18	if (xmax == 0 && ymax == 0) {
279	greg	2.10	xmax = scanlen(&input[nfiles].rs);
280			ymax = numscans(&input[nfiles].rs);
281			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
282			numscans(&input[nfiles].rs) != ymax) {
283	greg	1.16	eputs(input[nfiles].name);
284			eputs(": resolution mismatch\n");
285			quit(1);
286			}
287			/* allocate scanlines */
288			for (i = 0; i < WINSIZ; i++)
289	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
290	greg	1.15	}
291
292
293	greg	2.16	double
294			rgb_bright(clr)
295			COLOR clr;
296			{
297			return(bright(clr));
298			}
299
300
301			double
302			xyz_bright(clr)
303			COLOR clr;
304			{
305			return(clr[CIEY]);
306			}
307
308
309			double (*ourbright)() = rgb_bright;
310
311
312	greg	1.18	init() /* perform final setup */
313	greg	1.15	{
314	greg	2.18	double l_colin(), l_expos(), l_pixaspect(), l_ray(), l_psize();
315	greg	1.16	register int i;
316	greg	1.15	/* define constants */
317	greg	2.19	varset("PI", ':', PI);
318	greg	1.15	varset(vnfiles, ':', (double)nfiles);
319	greg	1.18	varset(vxmax, ':', (double)xmax);
320			varset(vymax, ':', (double)ymax);
321	greg	1.15	/* set functions */
322			for (i = 0; i < 3; i++) {
323	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
324	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
325			}
326	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
327	greg	1.15	funset(vbrtin, 1, '=', l_colin);
328	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
329			for (i = 0; i < 7; i++)
330	greg	2.10	funset(vray[i], 1, '=', l_ray);
331	greg	2.17	funset(vpsize, 1, '=', l_psize);
332	greg	2.16	/* set brightness function */
333	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
334			varset(vwhteff, ':', 1.0);
335	greg	2.16	ourbright = xyz_bright;
336	greg	2.18	} else
337			varset(vwhteff, ':', WHTEFFICACY);
338	greg	1.1	}
339
340
341			combine() /* combine pictures */
342			{
343	greg	1.8	EPNODE coldef[3], brtdef;
344	greg	1.1	COLOR *scanout;
345	greg	1.8	double d;
346	greg	1.1	register int i, j;
347			/* check defined variables */
348	greg	1.4	for (j = 0; j < 3; j++) {
349			if (vardefined(vcolout[j]))
350			coldef[j] = eparse(vcolout[j]);
351			else
352			coldef[j] = NULL;
353			}
354	greg	1.8	if (vardefined(vbrtout))
355			brtdef = eparse(vbrtout);
356			else
357			brtdef = NULL;
358	greg	1.1	/* allocate scanline */
359			scanout = (COLOR )emalloc(xressizeof(COLOR));
360	greg	1.18	/* set input position */
361			yscan = ymax+MIDSCN;
362	greg	1.1	/* combine files */
363			for (ypos = yres-1; ypos >= 0; ypos--) {
364	greg	1.14	advance();
365	greg	1.11	varset(vypos, '=', (double)ypos);
366	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
367	greg	1.18	xscan = (long)xpos*xmax/xres;
368	greg	1.11	varset(vxpos, '=', (double)xpos);
369	greg	1.8	eclock++;
370			if (brtdef != NULL) {
371			d = evalue(brtdef);
372			if (d < 0.0)
373			d = 0.0;
374			setcolor(scanout[xpos], d, d, d);
375			} else {
376			for (j = 0; j < 3; j++) {
377			if (coldef[j] != NULL) {
378	greg	1.13	d = evalue(coldef[j]);
379	greg	1.8	} else {
380	greg	1.13	d = 0.0;
381	greg	1.8	for (i = 0; i < nfiles; i++)
382	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
383	greg	1.1	}
384	greg	1.13	if (d < 0.0)
385			d = 0.0;
386			colval(scanout[xpos],j) = d;
387	greg	1.8	}
388	greg	1.1	}
389	greg	1.8	}
390			if (fwritescan(scanout, xres, stdout) < 0) {
391			perror("write error");
392			quit(1);
393			}
394	greg	1.1	}
395	greg	2.22	efree((char *)scanout);
396	greg	1.1	}
397
398
399	greg	1.18	advance() /* read in data for next scanline */
400	greg	1.14	{
401	greg	1.18	int ytarget;
402	greg	1.14	register COLOR *st;
403			register int i, j;
404
405	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
406			for (i = 0; i < nfiles; i++) {
407			st = input[i].scan[WINSIZ-1];
408			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
409			input[i].scan[j] = input[i].scan[j-1];
410			input[i].scan[0] = st;
411			if (yscan <= MIDSCN) /* hit bottom? */
412			continue;
413	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
414	greg	1.18	eputs(input[i].name);
415			eputs(": read error\n");
416			quit(1);
417			}
418	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
419			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
420			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
421			for (j = 0; j < xmax; j++) /* adjust color */
422			multcolor(st[j], input[i].coef);
423	greg	1.14	}
424			}
425
426
427	greg	1.1	double
428	greg	1.17	l_expos(nam) /* return picture exposure */
429	greg	1.15	register char *nam;
430	greg	1.1	{
431	greg	1.15	register int fn, n;
432	greg	1.14
433	greg	1.18	fn = argument(1) - .5;
434			if (fn < 0 \|\| fn >= nfiles)
435			return(1.0);
436	greg	1.17	if (nam == vbrtexp)
437	greg	2.16	return((*ourbright)(input[fn].expos));
438	greg	1.15	n = 3;
439			while (n--)
440	greg	1.17	if (nam == vcolexp[n])
441			return(colval(input[fn].expos,n));
442			eputs("Bad call to l_expos()!\n");
443	greg	1.15	quit(1);
444			}
445
446
447			double
448	greg	2.18	l_pixaspect() /* return pixel aspect ratio */
449			{
450			register int fn;
451
452			fn = argument(1) - .5;
453			if (fn < 0 \|\| fn >= nfiles)
454			return(1.0);
455			return(input[fn].pa);
456			}
457
458
459			double
460	greg	1.15	l_colin(nam) /* return color value for picture */
461			register char *nam;
462			{
463			int fn;
464			register int n, xoff, yoff;
465			double d;
466
467	greg	2.18	fn = argument(1) - .5;
468	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
469	greg	1.15	errno = EDOM;
470			return(0.0);
471			}
472	greg	1.14	xoff = yoff = 0;
473			n = nargum();
474			if (n >= 2) {
475			d = argument(2);
476			if (d < 0.0) {
477			xoff = d-.5;
478	greg	1.18	if (xscan+xoff < 0)
479			xoff = -xscan;
480	greg	1.14	} else {
481			xoff = d+.5;
482	greg	1.18	if (xscan+xoff >= xmax)
483			xoff = xmax-1-xscan;
484	greg	1.14	}
485			}
486			if (n >= 3) {
487			d = argument(3);
488			if (d < 0.0) {
489			yoff = d-.5;
490			if (yoff+MIDSCN < 0)
491			yoff = -MIDSCN;
492	greg	1.18	if (yscan+yoff < 0)
493			yoff = -yscan;
494	greg	1.14	} else {
495			yoff = d+.5;
496			if (yoff+MIDSCN >= WINSIZ)
497			yoff = WINSIZ-1-MIDSCN;
498	greg	1.18	if (yscan+yoff >= ymax)
499			yoff = ymax-1-yscan;
500	greg	1.14	}
501			}
502	greg	1.15	if (nam == vbrtin)
503	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
504	greg	1.15	n = 3;
505			while (n--)
506			if (nam == vcolin[n])
507	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
508	greg	1.15	eputs("Bad call to l_colin()!\n");
509	greg	2.10	quit(1);
510			}
511
512
513			double
514			l_ray(nam) /* return ray origin or direction */
515			register char *nam;
516			{
517	greg	2.15	static unsigned long ltick[MAXINP];
518	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
519	greg	2.18	static double ldist[MAXINP];
520	greg	2.10	FLOAT loc[2];
521			int fn;
522			register int i;
523
524	greg	2.18	fn = argument(1) - .5;
525	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
526			errno = EDOM;
527			return(0.0);
528			}
529	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
530	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
531			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
532	greg	2.20	ldist[fn] = -1.0;
533	greg	2.10	if (input[fn].vw.type == 0)
534	greg	2.12	errno = EDOM;
535	greg	2.10	else {
536	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
537	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
538			&input[fn].vw, loc[0], loc[1]);
539	greg	2.10	}
540	greg	2.18	ltick[fn] = eclock;
541	greg	2.10	}
542	greg	2.18	if (nam == vray[i=6])
543			return(ldist[fn]);
544	greg	2.10	while (i--)
545			if (nam == vray[i])
546			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
547			eputs("Bad call to l_ray()!\n");
548	greg	1.15	quit(1);
549	greg	2.17	}
550
551
552			double
553			l_psize() /* compute pixel size in steradians */
554			{
555			static unsigned long ltick[MAXINP];
556			static double psize[MAXINP];
557	greg	2.18	FVECT dir0, org, dirx, diry;
558			FLOAT locx[2], locy[2];
559	greg	2.17	double d;
560			int fn;
561	greg	2.18	register int i;
562	greg	2.17
563			d = argument(1);
564	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
565	greg	2.17	errno = EDOM;
566			return(0.0);
567			}
568	greg	2.18	fn = d - .5;
569	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
570	greg	2.18	psize[fn] = 0.0;
571			if (input[fn].vw.type == 0)
572	greg	2.17	errno = EDOM;
573	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
574			funvalue(vray[6], 1, &d) >= 0) {
575			for (i = 0; i < 3; i++)
576			dir0[i] = funvalue(vray[3+i], 1, &d);
577			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
578			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
579			if (viewray(org, dirx, &input[fn].vw,
580			locx[0], locx[1]) >= 0 &&
581			viewray(org, diry, &input[fn].vw,
582			locy[0], locy[1]) >= 0) {
583	greg	2.17	/* approximate solid angle */
584	greg	2.18	for (i = 0; i < 3; i++) {
585			dirx[i] -= dir0[i];
586			diry[i] -= dir0[i];
587			}
588			fcross(dir0, dirx, diry);
589	greg	2.22	psize[fn] = sqrt(DOT(dir0,dir0));
590	greg	2.17	}
591			}
592	greg	2.18	ltick[fn] = eclock;
593			}
594	greg	2.17	return(psize[fn]);
595	greg	1.1	}
596
597
598	greg	2.22	void
599	greg	1.1	wputs(msg)
600			char *msg;
601			{
602			if (!nowarn)
603			eputs(msg);
604			}
605
606
607	greg	2.22	void
608	greg	1.1	eputs(msg)
609			char *msg;
610			{
611			fputs(msg, stderr);
612			}
613
614
615	greg	2.22	void
616	greg	2.4	quit(code) /* exit gracefully */
617			int code;
618			{
619	greg	2.5	register int i;
620			/* close input files */
621			for (i = 0; i < nfiles; i++)
622	greg	2.6	if (input[i].name == Command)
623			pclose(input[i].fp);
624			else
625			fclose(input[i].fp);
626	greg	1.1	exit(code);
627			}