src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.26 2003/07/21 22:30:18 schorsch Exp $";
#endif
/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

#include "standard.h"
#include "platform.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);
                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(char *), l_expos(char *), l_pixaspect(char *),
                        l_ray(char *), l_psize(char *);
        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(char *nm)           /* 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];
        RREAL   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(char *nm)               /* compute pixel size in steradians */
{
        static unsigned long    ltick[MAXINP];
        static double   psize[MAXINP];
        FVECT   dir0, org, dirx, diry;
        RREAL   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:	2.27
Committed:	Mon Aug 4 22:37:53 2003 UTC (20 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.26:	+5 -4 lines
Log Message:	Added prototype for LIBR function pointer in calcomp.h
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.27	static const char RCSid[] = "$Id: pcomb.c,v 2.26 2003/07/21 22:30:18 schorsch 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	schorsch	2.24	#include "platform.h"
12	greg	1.1	#include "color.h"
13			#include "calcomp.h"
14	greg	2.10	#include "view.h"
15
16	greg	1.6	#define MAXINP 32 /* maximum number of input files */
17	greg	2.22	#define WINSIZ 64 /* scanline window size */
18	greg	2.13	#define MIDSCN ((WINSIZ-1)/2+1)
19	greg	1.1
20			struct {
21	greg	1.19	char name; / file or command name */
22	greg	1.1	FILE fp; / stream pointer */
23	greg	2.10	VIEW vw; /* view for picture */
24			RESOLU rs; /* image resolution and orientation */
25	greg	2.17	float pa; /* pixel aspect ratio */
26	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
27	greg	1.3	COLOR coef; /* coefficient */
28	greg	1.17	COLOR expos; /* recorded exposure */
29	greg	1.1	} input[MAXINP]; /* input pictures */
30
31			int nfiles; /* number of input files */
32
33	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
34
35	greg	2.6	char Command[] = "<Command>";
36	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
37			char vcolout[3][4] = {"ro", "go", "bo"};
38	greg	1.15	char vbrtin[] = "li";
39			char vbrtout[] = "lo";
40	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
41	greg	1.17	char vbrtexp[] = "le";
42	greg	2.18	char vpixaspect[] = "pa";
43	greg	1.1
44	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
45	greg	2.10
46	greg	2.17	char vpsize[] = "S";
47
48	greg	1.18	char vnfiles[] = "nfiles";
49	greg	2.18	char vwhteff[] = "WE";
50	greg	1.18	char vxmax[] = "xmax";
51			char vymax[] = "ymax";
52			char vxres[] = "xres";
53			char vyres[] = "yres";
54			char vxpos[] = "x";
55			char vypos[] = "y";
56	greg	1.1
57			int nowarn = 0; /* no warning messages? */
58
59	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
60	greg	1.9
61	greg	1.18	int xscan, yscan; /* input position */
62	greg	1.1
63	greg	1.18	int xres, yres; /* output resolution */
64	greg	1.1
65	greg	1.18	int xpos, ypos; /* output position */
66
67	greg	2.10	char progname; / global argv[0] */
68
69	greg	1.10	int wrongformat = 0;
70	greg	2.10	int gotview;
71	greg	1.1
72	greg	1.19	FILE *popen();
73	greg	1.10
74	greg	2.7	extern char *emalloc();
75	greg	1.19
76	greg	2.7
77	greg	1.1	main(argc, argv)
78			int argc;
79			char *argv[];
80			{
81	greg	1.18	int original;
82	greg	1.3	double f;
83	greg	1.14	int a, i;
84	schorsch	2.23	SET_DEFAULT_BINARY();
85			SET_FILE_BINARY(stdin);
86			SET_FILE_BINARY(stdout);
87	greg	2.10	progname = argv[0];
88	greg	1.15	/* scan options */
89			for (a = 1; a < argc; a++) {
90	greg	1.1	if (argv[a][0] == '-')
91			switch (argv[a][1]) {
92			case 'x':
93			case 'y':
94	greg	1.18	a++;
95	greg	1.15	continue;
96	greg	1.1	case 'w':
97			nowarn = !nowarn;
98	greg	1.15	continue;
99	greg	1.1	case 'f':
100			case 'e':
101	greg	1.16	a++;
102	greg	1.15	continue;
103	greg	1.1	}
104	greg	1.15	break;
105			}
106	greg	2.14	newheader("RADIANCE", stdout); /* start header */
107	greg	2.22	fputnow(stdout);
108	greg	1.15	/* process files */
109	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
110	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
111	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
112	schorsch	2.26	input[nfiles].vw = stdview;
113	greg	2.17	input[nfiles].pa = 1.0;
114	greg	1.17	}
115	greg	1.1	nfiles = 0;
116	greg	1.18	original = 0;
117	greg	1.1	for ( ; a < argc; a++) {
118			if (nfiles >= MAXINP) {
119			eputs(argv[0]);
120			eputs(": too many picture files\n");
121			quit(1);
122			}
123	greg	1.3	if (argv[a][0] == '-')
124			switch (argv[a][1]) {
125			case '\0':
126			input[nfiles].name = "<stdin>";
127			input[nfiles].fp = stdin;
128			break;
129	greg	1.17	case 'o':
130			original++;
131	greg	1.22	continue;
132	greg	1.3	case 's':
133			f = atof(argv[++a]);
134			scalecolor(input[nfiles].coef, f);
135			continue;
136			case 'c':
137			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
138			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
139			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
140			continue;
141			default:
142			goto usage;
143			}
144			else {
145	greg	2.2	if (argv[a][0] == '!') {
146	greg	2.6	input[nfiles].name = Command;
147	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
148			} else {
149			input[nfiles].name = argv[a];
150			input[nfiles].fp = fopen(argv[a], "r");
151			}
152	greg	1.1	if (input[nfiles].fp == NULL) {
153	greg	1.6	perror(argv[a]);
154	greg	1.1	quit(1);
155			}
156			}
157	greg	1.16	checkfile();
158	greg	1.18	if (original) {
159			colval(input[nfiles].coef,RED) /=
160			colval(input[nfiles].expos,RED);
161			colval(input[nfiles].coef,GRN) /=
162			colval(input[nfiles].expos,GRN);
163			colval(input[nfiles].coef,BLU) /=
164			colval(input[nfiles].expos,BLU);
165	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
166	greg	1.18	}
167			nfiles++;
168	greg	1.17	original = 0;
169	greg	1.15	}
170	greg	1.18	init(); /* set constants */
171	greg	1.15	/* go back and get expressions */
172			for (a = 1; a < argc; a++) {
173			if (argv[a][0] == '-')
174			switch (argv[a][1]) {
175			case 'x':
176	greg	1.21	varset(vxres, ':', eval(argv[++a]));
177	greg	1.18	continue;
178	greg	1.15	case 'y':
179	greg	1.21	varset(vyres, ':', eval(argv[++a]));
180	greg	1.16	continue;
181	greg	1.15	case 'w':
182			continue;
183			case 'f':
184			fcompile(argv[++a]);
185			continue;
186			case 'e':
187			scompile(argv[++a], NULL, 0);
188			continue;
189			}
190			break;
191			}
192	greg	1.18	/* set/get output resolution */
193			if (!vardefined(vxres))
194			varset(vxres, ':', (double)xmax);
195			if (!vardefined(vyres))
196			varset(vyres, ':', (double)ymax);
197			xres = varvalue(vxres) + .5;
198			yres = varvalue(vyres) + .5;
199			if (xres <= 0 \|\| yres <= 0) {
200			eputs(argv[0]);
201			eputs(": illegal output resolution\n");
202			quit(1);
203			}
204	greg	1.15	/* complete header */
205			printargs(argc, argv, stdout);
206	greg	2.16	if (strcmp(ourfmt, PICFMT))
207			fputformat(ourfmt, stdout); /* print format if known */
208	greg	1.15	putchar('\n');
209	greg	1.23	fprtresolu(xres, yres, stdout);
210	greg	1.15	/* combine pictures */
211			combine();
212			quit(0);
213			usage:
214			eputs("Usage: ");
215			eputs(argv[0]);
216			eputs(
217	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
218	greg	1.15	quit(1);
219			}
220
221
222	greg	2.22	tabputs(s) /* put out string preceded by a tab */
223	greg	1.15	char *s;
224			{
225			char fmt[32];
226			double d;
227			COLOR ctmp;
228
229	greg	2.14	if (isheadid(s)) /* header id */
230	gwlarson	2.21	return(0); /* don't echo */
231	greg	2.14	if (formatval(fmt, s)) { /* check format */
232	greg	2.16	if (globmatch(ourfmt, fmt)) {
233			wrongformat = 0;
234			strcpy(ourfmt, fmt);
235			} else
236	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
237	gwlarson	2.21	return(0); /* don't echo */
238	greg	1.17	}
239			if (isexpos(s)) { /* exposure */
240			d = exposval(s);
241			scalecolor(input[nfiles].expos, d);
242			} else if (iscolcor(s)) { /* color correction */
243	greg	1.15	colcorval(ctmp, s);
244	greg	1.17	multcolor(input[nfiles].expos, ctmp);
245	greg	2.18	} else if (isaspect(s))
246	greg	2.17	input[nfiles].pa *= aspectval(s);
247	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
248	greg	2.10	gotview++;
249	greg	1.17	/* echo line */
250			putchar('\t');
251	gwlarson	2.21	return(fputs(s, stdout));
252	greg	1.16	}
253	greg	1.15
254	greg	1.16
255			checkfile() /* ready a file */
256			{
257			register int i;
258			/* process header */
259	greg	2.10	gotview = 0;
260	greg	1.16	fputs(input[nfiles].name, stdout);
261			fputs(":\n", stdout);
262	greg	2.22	getheader(input[nfiles].fp, tabputs, NULL);
263			if (wrongformat < 0) {
264	greg	1.16	eputs(input[nfiles].name);
265	greg	2.22	eputs(": not a Radiance picture\n");
266	greg	1.16	quit(1);
267			}
268	greg	2.22	if (wrongformat > 0) {
269			wputs(input[nfiles].name);
270			wputs(": warning -- incompatible picture format\n");
271			}
272	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
273			input[nfiles].vw.type = 0;
274			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
275	greg	1.16	eputs(input[nfiles].name);
276			eputs(": bad picture size\n");
277			quit(1);
278			}
279	greg	1.18	if (xmax == 0 && ymax == 0) {
280	greg	2.10	xmax = scanlen(&input[nfiles].rs);
281			ymax = numscans(&input[nfiles].rs);
282			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
283			numscans(&input[nfiles].rs) != ymax) {
284	greg	1.16	eputs(input[nfiles].name);
285			eputs(": resolution mismatch\n");
286			quit(1);
287			}
288			/* allocate scanlines */
289			for (i = 0; i < WINSIZ; i++)
290	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
291	greg	1.15	}
292
293
294	greg	2.16	double
295			rgb_bright(clr)
296			COLOR clr;
297			{
298			return(bright(clr));
299			}
300
301
302			double
303			xyz_bright(clr)
304			COLOR clr;
305			{
306			return(clr[CIEY]);
307			}
308
309
310			double (*ourbright)() = rgb_bright;
311
312
313	greg	1.18	init() /* perform final setup */
314	greg	1.15	{
315	greg	2.27	double l_colin(char ), l_expos(char ), l_pixaspect(char *),
316			l_ray(char ), l_psize(char );
317	greg	1.16	register int i;
318	greg	1.15	/* define constants */
319	greg	2.19	varset("PI", ':', PI);
320	greg	1.15	varset(vnfiles, ':', (double)nfiles);
321	greg	1.18	varset(vxmax, ':', (double)xmax);
322			varset(vymax, ':', (double)ymax);
323	greg	1.15	/* set functions */
324			for (i = 0; i < 3; i++) {
325	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
326	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
327			}
328	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
329	greg	1.15	funset(vbrtin, 1, '=', l_colin);
330	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
331			for (i = 0; i < 7; i++)
332	greg	2.10	funset(vray[i], 1, '=', l_ray);
333	greg	2.17	funset(vpsize, 1, '=', l_psize);
334	greg	2.16	/* set brightness function */
335	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
336			varset(vwhteff, ':', 1.0);
337	greg	2.16	ourbright = xyz_bright;
338	greg	2.18	} else
339			varset(vwhteff, ':', WHTEFFICACY);
340	greg	1.1	}
341
342
343			combine() /* combine pictures */
344			{
345	greg	1.8	EPNODE coldef[3], brtdef;
346	greg	1.1	COLOR *scanout;
347	greg	1.8	double d;
348	greg	1.1	register int i, j;
349			/* check defined variables */
350	greg	1.4	for (j = 0; j < 3; j++) {
351			if (vardefined(vcolout[j]))
352			coldef[j] = eparse(vcolout[j]);
353			else
354			coldef[j] = NULL;
355			}
356	greg	1.8	if (vardefined(vbrtout))
357			brtdef = eparse(vbrtout);
358			else
359			brtdef = NULL;
360	greg	1.1	/* allocate scanline */
361			scanout = (COLOR )emalloc(xressizeof(COLOR));
362	greg	1.18	/* set input position */
363			yscan = ymax+MIDSCN;
364	greg	1.1	/* combine files */
365			for (ypos = yres-1; ypos >= 0; ypos--) {
366	greg	1.14	advance();
367	greg	1.11	varset(vypos, '=', (double)ypos);
368	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
369	greg	1.18	xscan = (long)xpos*xmax/xres;
370	greg	1.11	varset(vxpos, '=', (double)xpos);
371	greg	1.8	eclock++;
372			if (brtdef != NULL) {
373			d = evalue(brtdef);
374			if (d < 0.0)
375			d = 0.0;
376			setcolor(scanout[xpos], d, d, d);
377			} else {
378			for (j = 0; j < 3; j++) {
379			if (coldef[j] != NULL) {
380	greg	1.13	d = evalue(coldef[j]);
381	greg	1.8	} else {
382	greg	1.13	d = 0.0;
383	greg	1.8	for (i = 0; i < nfiles; i++)
384	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
385	greg	1.1	}
386	greg	1.13	if (d < 0.0)
387			d = 0.0;
388			colval(scanout[xpos],j) = d;
389	greg	1.8	}
390	greg	1.1	}
391	greg	1.8	}
392			if (fwritescan(scanout, xres, stdout) < 0) {
393			perror("write error");
394			quit(1);
395			}
396	greg	1.1	}
397	greg	2.22	efree((char *)scanout);
398	greg	1.1	}
399
400
401	greg	1.18	advance() /* read in data for next scanline */
402	greg	1.14	{
403	greg	1.18	int ytarget;
404	greg	1.14	register COLOR *st;
405			register int i, j;
406
407	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
408			for (i = 0; i < nfiles; i++) {
409			st = input[i].scan[WINSIZ-1];
410			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
411			input[i].scan[j] = input[i].scan[j-1];
412			input[i].scan[0] = st;
413			if (yscan <= MIDSCN) /* hit bottom? */
414			continue;
415	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
416	greg	1.18	eputs(input[i].name);
417			eputs(": read error\n");
418			quit(1);
419			}
420	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
421			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
422			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
423			for (j = 0; j < xmax; j++) /* adjust color */
424			multcolor(st[j], input[i].coef);
425	greg	1.14	}
426			}
427
428
429	greg	1.1	double
430	greg	1.17	l_expos(nam) /* return picture exposure */
431	greg	1.15	register char *nam;
432	greg	1.1	{
433	greg	1.15	register int fn, n;
434	greg	1.14
435	greg	1.18	fn = argument(1) - .5;
436			if (fn < 0 \|\| fn >= nfiles)
437			return(1.0);
438	greg	1.17	if (nam == vbrtexp)
439	greg	2.16	return((*ourbright)(input[fn].expos));
440	greg	1.15	n = 3;
441			while (n--)
442	greg	1.17	if (nam == vcolexp[n])
443			return(colval(input[fn].expos,n));
444			eputs("Bad call to l_expos()!\n");
445	greg	1.15	quit(1);
446			}
447
448
449			double
450	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
451	greg	2.18	{
452			register int fn;
453
454			fn = argument(1) - .5;
455			if (fn < 0 \|\| fn >= nfiles)
456			return(1.0);
457			return(input[fn].pa);
458			}
459
460
461			double
462	greg	1.15	l_colin(nam) /* return color value for picture */
463			register char *nam;
464			{
465			int fn;
466			register int n, xoff, yoff;
467			double d;
468
469	greg	2.18	fn = argument(1) - .5;
470	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
471	greg	1.15	errno = EDOM;
472			return(0.0);
473			}
474	greg	1.14	xoff = yoff = 0;
475			n = nargum();
476			if (n >= 2) {
477			d = argument(2);
478			if (d < 0.0) {
479			xoff = d-.5;
480	greg	1.18	if (xscan+xoff < 0)
481			xoff = -xscan;
482	greg	1.14	} else {
483			xoff = d+.5;
484	greg	1.18	if (xscan+xoff >= xmax)
485			xoff = xmax-1-xscan;
486	greg	1.14	}
487			}
488			if (n >= 3) {
489			d = argument(3);
490			if (d < 0.0) {
491			yoff = d-.5;
492			if (yoff+MIDSCN < 0)
493			yoff = -MIDSCN;
494	greg	1.18	if (yscan+yoff < 0)
495			yoff = -yscan;
496	greg	1.14	} else {
497			yoff = d+.5;
498			if (yoff+MIDSCN >= WINSIZ)
499			yoff = WINSIZ-1-MIDSCN;
500	greg	1.18	if (yscan+yoff >= ymax)
501			yoff = ymax-1-yscan;
502	greg	1.14	}
503			}
504	greg	1.15	if (nam == vbrtin)
505	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
506	greg	1.15	n = 3;
507			while (n--)
508			if (nam == vcolin[n])
509	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
510	greg	1.15	eputs("Bad call to l_colin()!\n");
511	greg	2.10	quit(1);
512			}
513
514
515			double
516			l_ray(nam) /* return ray origin or direction */
517			register char *nam;
518			{
519	greg	2.15	static unsigned long ltick[MAXINP];
520	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
521	greg	2.18	static double ldist[MAXINP];
522	schorsch	2.25	RREAL loc[2];
523	greg	2.10	int fn;
524			register int i;
525
526	greg	2.18	fn = argument(1) - .5;
527	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
528			errno = EDOM;
529			return(0.0);
530			}
531	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
532	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
533			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
534	greg	2.20	ldist[fn] = -1.0;
535	greg	2.10	if (input[fn].vw.type == 0)
536	greg	2.12	errno = EDOM;
537	greg	2.10	else {
538	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
539	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
540			&input[fn].vw, loc[0], loc[1]);
541	greg	2.10	}
542	greg	2.18	ltick[fn] = eclock;
543	greg	2.10	}
544	greg	2.18	if (nam == vray[i=6])
545			return(ldist[fn]);
546	greg	2.10	while (i--)
547			if (nam == vray[i])
548			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
549			eputs("Bad call to l_ray()!\n");
550	greg	1.15	quit(1);
551	greg	2.17	}
552
553
554			double
555	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
556	greg	2.17	{
557			static unsigned long ltick[MAXINP];
558			static double psize[MAXINP];
559	greg	2.18	FVECT dir0, org, dirx, diry;
560	schorsch	2.25	RREAL locx[2], locy[2];
561	greg	2.17	double d;
562			int fn;
563	greg	2.18	register int i;
564	greg	2.17
565			d = argument(1);
566	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
567	greg	2.17	errno = EDOM;
568			return(0.0);
569			}
570	greg	2.18	fn = d - .5;
571	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
572	greg	2.18	psize[fn] = 0.0;
573			if (input[fn].vw.type == 0)
574	greg	2.17	errno = EDOM;
575	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
576			funvalue(vray[6], 1, &d) >= 0) {
577			for (i = 0; i < 3; i++)
578			dir0[i] = funvalue(vray[3+i], 1, &d);
579			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
580			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
581			if (viewray(org, dirx, &input[fn].vw,
582			locx[0], locx[1]) >= 0 &&
583			viewray(org, diry, &input[fn].vw,
584			locy[0], locy[1]) >= 0) {
585	greg	2.17	/* approximate solid angle */
586	greg	2.18	for (i = 0; i < 3; i++) {
587			dirx[i] -= dir0[i];
588			diry[i] -= dir0[i];
589			}
590			fcross(dir0, dirx, diry);
591	greg	2.22	psize[fn] = sqrt(DOT(dir0,dir0));
592	greg	2.17	}
593			}
594	greg	2.18	ltick[fn] = eclock;
595			}
596	greg	2.17	return(psize[fn]);
597	greg	1.1	}
598
599
600	greg	2.22	void
601	greg	1.1	wputs(msg)
602			char *msg;
603			{
604			if (!nowarn)
605			eputs(msg);
606			}
607
608
609	greg	2.22	void
610	greg	1.1	eputs(msg)
611			char *msg;
612			{
613			fputs(msg, stderr);
614			}
615
616
617	greg	2.22	void
618	greg	2.4	quit(code) /* exit gracefully */
619			int code;
620			{
621	greg	2.5	register int i;
622			/* close input files */
623			for (i = 0; i < nfiles; i++)
624	greg	2.6	if (input[i].name == Command)
625			pclose(input[i].fp);
626			else
627			fclose(input[i].fp);
628	greg	1.1	exit(code);
629			}