src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.30 2004/01/02 12:47:01 schorsch Exp $";
#endif
/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

#include "platform.h"
#include "rtprocess.h"
#include "rterror.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    StandardInput[] = "<stdin>";
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;


extern char     *emalloc();

static gethfunc tabputs;

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 = StandardInput;
                                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);
}


static int
tabputs(                        /* put out string preceded by a tab */
        char    *s,
        void    *p
)
{
        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]);
}


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


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


extern void
quit(int code)          /* exit gracefully */
{
        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:	2.31
Committed:	Mon Mar 15 21:16:54 2004 UTC (20 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.30:	+3 -2 lines
Log Message:	Made it so pcompos does not cut off input command streams abruptly
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.31	static const char RCSid[] = "$Id: pcomb.c,v 2.30 2004/01/02 12:47:01 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	2.28	#include "platform.h"
11	schorsch	2.29	#include "rtprocess.h"
12			#include "rterror.h"
13	greg	1.1	#include "color.h"
14			#include "calcomp.h"
15	greg	2.10	#include "view.h"
16
17	greg	1.6	#define MAXINP 32 /* maximum number of input files */
18	greg	2.22	#define WINSIZ 64 /* scanline window size */
19	greg	2.13	#define MIDSCN ((WINSIZ-1)/2+1)
20	greg	1.1
21			struct {
22	greg	1.19	char name; / file or command name */
23	greg	1.1	FILE fp; / stream pointer */
24	greg	2.10	VIEW vw; /* view for picture */
25			RESOLU rs; /* image resolution and orientation */
26	greg	2.17	float pa; /* pixel aspect ratio */
27	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
28	greg	1.3	COLOR coef; /* coefficient */
29	greg	1.17	COLOR expos; /* recorded exposure */
30	greg	1.1	} input[MAXINP]; /* input pictures */
31
32			int nfiles; /* number of input files */
33
34	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
35
36	greg	2.31	char StandardInput[] = "<stdin>";
37	greg	2.6	char Command[] = "<Command>";
38	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
39			char vcolout[3][4] = {"ro", "go", "bo"};
40	greg	1.15	char vbrtin[] = "li";
41			char vbrtout[] = "lo";
42	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
43	greg	1.17	char vbrtexp[] = "le";
44	greg	2.18	char vpixaspect[] = "pa";
45	greg	1.1
46	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
47	greg	2.10
48	greg	2.17	char vpsize[] = "S";
49
50	greg	1.18	char vnfiles[] = "nfiles";
51	greg	2.18	char vwhteff[] = "WE";
52	greg	1.18	char vxmax[] = "xmax";
53			char vymax[] = "ymax";
54			char vxres[] = "xres";
55			char vyres[] = "yres";
56			char vxpos[] = "x";
57			char vypos[] = "y";
58	greg	1.1
59			int nowarn = 0; /* no warning messages? */
60
61	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
62	greg	1.9
63	greg	1.18	int xscan, yscan; /* input position */
64	greg	1.1
65	greg	1.18	int xres, yres; /* output resolution */
66	greg	1.1
67	greg	1.18	int xpos, ypos; /* output position */
68
69	greg	2.10	char progname; / global argv[0] */
70
71	greg	1.10	int wrongformat = 0;
72	greg	2.10	int gotview;
73	greg	1.1
74	greg	1.10
75	greg	2.7	extern char *emalloc();
76	greg	1.19
77	schorsch	2.30	static gethfunc tabputs;
78	greg	2.7
79	greg	1.1	main(argc, argv)
80			int argc;
81			char *argv[];
82			{
83	greg	1.18	int original;
84	greg	1.3	double f;
85	greg	1.14	int a, i;
86	schorsch	2.23	SET_DEFAULT_BINARY();
87			SET_FILE_BINARY(stdin);
88			SET_FILE_BINARY(stdout);
89	greg	2.10	progname = argv[0];
90	greg	1.15	/* scan options */
91			for (a = 1; a < argc; a++) {
92	greg	1.1	if (argv[a][0] == '-')
93			switch (argv[a][1]) {
94			case 'x':
95			case 'y':
96	greg	1.18	a++;
97	greg	1.15	continue;
98	greg	1.1	case 'w':
99			nowarn = !nowarn;
100	greg	1.15	continue;
101	greg	1.1	case 'f':
102			case 'e':
103	greg	1.16	a++;
104	greg	1.15	continue;
105	greg	1.1	}
106	greg	1.15	break;
107			}
108	greg	2.14	newheader("RADIANCE", stdout); /* start header */
109	greg	2.22	fputnow(stdout);
110	greg	1.15	/* process files */
111	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
112	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
113	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
114	schorsch	2.26	input[nfiles].vw = stdview;
115	greg	2.17	input[nfiles].pa = 1.0;
116	greg	1.17	}
117	greg	1.1	nfiles = 0;
118	greg	1.18	original = 0;
119	greg	1.1	for ( ; a < argc; a++) {
120			if (nfiles >= MAXINP) {
121			eputs(argv[0]);
122			eputs(": too many picture files\n");
123			quit(1);
124			}
125	greg	1.3	if (argv[a][0] == '-')
126			switch (argv[a][1]) {
127			case '\0':
128	greg	2.31	input[nfiles].name = StandardInput;
129	greg	1.3	input[nfiles].fp = stdin;
130			break;
131	greg	1.17	case 'o':
132			original++;
133	greg	1.22	continue;
134	greg	1.3	case 's':
135			f = atof(argv[++a]);
136			scalecolor(input[nfiles].coef, f);
137			continue;
138			case 'c':
139			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
140			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
141			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
142			continue;
143			default:
144			goto usage;
145			}
146			else {
147	greg	2.2	if (argv[a][0] == '!') {
148	greg	2.6	input[nfiles].name = Command;
149	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
150			} else {
151			input[nfiles].name = argv[a];
152			input[nfiles].fp = fopen(argv[a], "r");
153			}
154	greg	1.1	if (input[nfiles].fp == NULL) {
155	greg	1.6	perror(argv[a]);
156	greg	1.1	quit(1);
157			}
158			}
159	greg	1.16	checkfile();
160	greg	1.18	if (original) {
161			colval(input[nfiles].coef,RED) /=
162			colval(input[nfiles].expos,RED);
163			colval(input[nfiles].coef,GRN) /=
164			colval(input[nfiles].expos,GRN);
165			colval(input[nfiles].coef,BLU) /=
166			colval(input[nfiles].expos,BLU);
167	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
168	greg	1.18	}
169			nfiles++;
170	greg	1.17	original = 0;
171	greg	1.15	}
172	greg	1.18	init(); /* set constants */
173	greg	1.15	/* go back and get expressions */
174			for (a = 1; a < argc; a++) {
175			if (argv[a][0] == '-')
176			switch (argv[a][1]) {
177			case 'x':
178	greg	1.21	varset(vxres, ':', eval(argv[++a]));
179	greg	1.18	continue;
180	greg	1.15	case 'y':
181	greg	1.21	varset(vyres, ':', eval(argv[++a]));
182	greg	1.16	continue;
183	greg	1.15	case 'w':
184			continue;
185			case 'f':
186			fcompile(argv[++a]);
187			continue;
188			case 'e':
189			scompile(argv[++a], NULL, 0);
190			continue;
191			}
192			break;
193			}
194	greg	1.18	/* set/get output resolution */
195			if (!vardefined(vxres))
196			varset(vxres, ':', (double)xmax);
197			if (!vardefined(vyres))
198			varset(vyres, ':', (double)ymax);
199			xres = varvalue(vxres) + .5;
200			yres = varvalue(vyres) + .5;
201			if (xres <= 0 \|\| yres <= 0) {
202			eputs(argv[0]);
203			eputs(": illegal output resolution\n");
204			quit(1);
205			}
206	greg	1.15	/* complete header */
207			printargs(argc, argv, stdout);
208	greg	2.16	if (strcmp(ourfmt, PICFMT))
209			fputformat(ourfmt, stdout); /* print format if known */
210	greg	1.15	putchar('\n');
211	greg	1.23	fprtresolu(xres, yres, stdout);
212	greg	1.15	/* combine pictures */
213			combine();
214			quit(0);
215			usage:
216			eputs("Usage: ");
217			eputs(argv[0]);
218			eputs(
219	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
220	greg	1.15	quit(1);
221			}
222
223
224	schorsch	2.30	static int
225			tabputs( /* put out string preceded by a tab */
226			char *s,
227			void *p
228			)
229	greg	1.15	{
230			char fmt[32];
231			double d;
232			COLOR ctmp;
233
234	greg	2.14	if (isheadid(s)) /* header id */
235	gwlarson	2.21	return(0); /* don't echo */
236	greg	2.14	if (formatval(fmt, s)) { /* check format */
237	greg	2.16	if (globmatch(ourfmt, fmt)) {
238			wrongformat = 0;
239			strcpy(ourfmt, fmt);
240			} else
241	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
242	gwlarson	2.21	return(0); /* don't echo */
243	greg	1.17	}
244			if (isexpos(s)) { /* exposure */
245			d = exposval(s);
246			scalecolor(input[nfiles].expos, d);
247			} else if (iscolcor(s)) { /* color correction */
248	greg	1.15	colcorval(ctmp, s);
249	greg	1.17	multcolor(input[nfiles].expos, ctmp);
250	greg	2.18	} else if (isaspect(s))
251	greg	2.17	input[nfiles].pa *= aspectval(s);
252	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
253	greg	2.10	gotview++;
254	greg	1.17	/* echo line */
255			putchar('\t');
256	gwlarson	2.21	return(fputs(s, stdout));
257	greg	1.16	}
258	greg	1.15
259	greg	1.16
260			checkfile() /* ready a file */
261			{
262			register int i;
263			/* process header */
264	greg	2.10	gotview = 0;
265	greg	1.16	fputs(input[nfiles].name, stdout);
266			fputs(":\n", stdout);
267	greg	2.22	getheader(input[nfiles].fp, tabputs, NULL);
268			if (wrongformat < 0) {
269	greg	1.16	eputs(input[nfiles].name);
270	greg	2.22	eputs(": not a Radiance picture\n");
271	greg	1.16	quit(1);
272			}
273	greg	2.22	if (wrongformat > 0) {
274			wputs(input[nfiles].name);
275			wputs(": warning -- incompatible picture format\n");
276			}
277	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
278			input[nfiles].vw.type = 0;
279			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
280	greg	1.16	eputs(input[nfiles].name);
281			eputs(": bad picture size\n");
282			quit(1);
283			}
284	greg	1.18	if (xmax == 0 && ymax == 0) {
285	greg	2.10	xmax = scanlen(&input[nfiles].rs);
286			ymax = numscans(&input[nfiles].rs);
287			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
288			numscans(&input[nfiles].rs) != ymax) {
289	greg	1.16	eputs(input[nfiles].name);
290			eputs(": resolution mismatch\n");
291			quit(1);
292			}
293			/* allocate scanlines */
294			for (i = 0; i < WINSIZ; i++)
295	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
296	greg	1.15	}
297
298
299	greg	2.16	double
300			rgb_bright(clr)
301			COLOR clr;
302			{
303			return(bright(clr));
304			}
305
306
307			double
308			xyz_bright(clr)
309			COLOR clr;
310			{
311			return(clr[CIEY]);
312			}
313
314
315			double (*ourbright)() = rgb_bright;
316
317
318	greg	1.18	init() /* perform final setup */
319	greg	1.15	{
320	greg	2.27	double l_colin(char ), l_expos(char ), l_pixaspect(char *),
321			l_ray(char ), l_psize(char );
322	greg	1.16	register int i;
323	greg	1.15	/* define constants */
324	greg	2.19	varset("PI", ':', PI);
325	greg	1.15	varset(vnfiles, ':', (double)nfiles);
326	greg	1.18	varset(vxmax, ':', (double)xmax);
327			varset(vymax, ':', (double)ymax);
328	greg	1.15	/* set functions */
329			for (i = 0; i < 3; i++) {
330	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
331	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
332			}
333	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
334	greg	1.15	funset(vbrtin, 1, '=', l_colin);
335	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
336			for (i = 0; i < 7; i++)
337	greg	2.10	funset(vray[i], 1, '=', l_ray);
338	greg	2.17	funset(vpsize, 1, '=', l_psize);
339	greg	2.16	/* set brightness function */
340	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
341			varset(vwhteff, ':', 1.0);
342	greg	2.16	ourbright = xyz_bright;
343	greg	2.18	} else
344			varset(vwhteff, ':', WHTEFFICACY);
345	greg	1.1	}
346
347
348			combine() /* combine pictures */
349			{
350	greg	1.8	EPNODE coldef[3], brtdef;
351	greg	1.1	COLOR *scanout;
352	greg	1.8	double d;
353	greg	1.1	register int i, j;
354			/* check defined variables */
355	greg	1.4	for (j = 0; j < 3; j++) {
356			if (vardefined(vcolout[j]))
357			coldef[j] = eparse(vcolout[j]);
358			else
359			coldef[j] = NULL;
360			}
361	greg	1.8	if (vardefined(vbrtout))
362			brtdef = eparse(vbrtout);
363			else
364			brtdef = NULL;
365	greg	1.1	/* allocate scanline */
366			scanout = (COLOR )emalloc(xressizeof(COLOR));
367	greg	1.18	/* set input position */
368			yscan = ymax+MIDSCN;
369	greg	1.1	/* combine files */
370			for (ypos = yres-1; ypos >= 0; ypos--) {
371	greg	1.14	advance();
372	greg	1.11	varset(vypos, '=', (double)ypos);
373	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
374	greg	1.18	xscan = (long)xpos*xmax/xres;
375	greg	1.11	varset(vxpos, '=', (double)xpos);
376	greg	1.8	eclock++;
377			if (brtdef != NULL) {
378			d = evalue(brtdef);
379			if (d < 0.0)
380			d = 0.0;
381			setcolor(scanout[xpos], d, d, d);
382			} else {
383			for (j = 0; j < 3; j++) {
384			if (coldef[j] != NULL) {
385	greg	1.13	d = evalue(coldef[j]);
386	greg	1.8	} else {
387	greg	1.13	d = 0.0;
388	greg	1.8	for (i = 0; i < nfiles; i++)
389	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
390	greg	1.1	}
391	greg	1.13	if (d < 0.0)
392			d = 0.0;
393			colval(scanout[xpos],j) = d;
394	greg	1.8	}
395	greg	1.1	}
396	greg	1.8	}
397			if (fwritescan(scanout, xres, stdout) < 0) {
398			perror("write error");
399			quit(1);
400			}
401	greg	1.1	}
402	greg	2.22	efree((char *)scanout);
403	greg	1.1	}
404
405
406	greg	1.18	advance() /* read in data for next scanline */
407	greg	1.14	{
408	greg	1.18	int ytarget;
409	greg	1.14	register COLOR *st;
410			register int i, j;
411
412	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
413			for (i = 0; i < nfiles; i++) {
414			st = input[i].scan[WINSIZ-1];
415			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
416			input[i].scan[j] = input[i].scan[j-1];
417			input[i].scan[0] = st;
418			if (yscan <= MIDSCN) /* hit bottom? */
419			continue;
420	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
421	greg	1.18	eputs(input[i].name);
422			eputs(": read error\n");
423			quit(1);
424			}
425	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
426			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
427			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
428			for (j = 0; j < xmax; j++) /* adjust color */
429			multcolor(st[j], input[i].coef);
430	greg	1.14	}
431			}
432
433
434	greg	1.1	double
435	greg	1.17	l_expos(nam) /* return picture exposure */
436	greg	1.15	register char *nam;
437	greg	1.1	{
438	greg	1.15	register int fn, n;
439	greg	1.14
440	greg	1.18	fn = argument(1) - .5;
441			if (fn < 0 \|\| fn >= nfiles)
442			return(1.0);
443	greg	1.17	if (nam == vbrtexp)
444	greg	2.16	return((*ourbright)(input[fn].expos));
445	greg	1.15	n = 3;
446			while (n--)
447	greg	1.17	if (nam == vcolexp[n])
448			return(colval(input[fn].expos,n));
449			eputs("Bad call to l_expos()!\n");
450	greg	1.15	quit(1);
451			}
452
453
454			double
455	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
456	greg	2.18	{
457			register int fn;
458
459			fn = argument(1) - .5;
460			if (fn < 0 \|\| fn >= nfiles)
461			return(1.0);
462			return(input[fn].pa);
463			}
464
465
466			double
467	greg	1.15	l_colin(nam) /* return color value for picture */
468			register char *nam;
469			{
470			int fn;
471			register int n, xoff, yoff;
472			double d;
473
474	greg	2.18	fn = argument(1) - .5;
475	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
476	greg	1.15	errno = EDOM;
477			return(0.0);
478			}
479	greg	1.14	xoff = yoff = 0;
480			n = nargum();
481			if (n >= 2) {
482			d = argument(2);
483			if (d < 0.0) {
484			xoff = d-.5;
485	greg	1.18	if (xscan+xoff < 0)
486			xoff = -xscan;
487	greg	1.14	} else {
488			xoff = d+.5;
489	greg	1.18	if (xscan+xoff >= xmax)
490			xoff = xmax-1-xscan;
491	greg	1.14	}
492			}
493			if (n >= 3) {
494			d = argument(3);
495			if (d < 0.0) {
496			yoff = d-.5;
497			if (yoff+MIDSCN < 0)
498			yoff = -MIDSCN;
499	greg	1.18	if (yscan+yoff < 0)
500			yoff = -yscan;
501	greg	1.14	} else {
502			yoff = d+.5;
503			if (yoff+MIDSCN >= WINSIZ)
504			yoff = WINSIZ-1-MIDSCN;
505	greg	1.18	if (yscan+yoff >= ymax)
506			yoff = ymax-1-yscan;
507	greg	1.14	}
508			}
509	greg	1.15	if (nam == vbrtin)
510	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
511	greg	1.15	n = 3;
512			while (n--)
513			if (nam == vcolin[n])
514	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
515	greg	1.15	eputs("Bad call to l_colin()!\n");
516	greg	2.10	quit(1);
517			}
518
519
520			double
521			l_ray(nam) /* return ray origin or direction */
522			register char *nam;
523			{
524	greg	2.15	static unsigned long ltick[MAXINP];
525	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
526	greg	2.18	static double ldist[MAXINP];
527	schorsch	2.25	RREAL loc[2];
528	greg	2.10	int fn;
529			register int i;
530
531	greg	2.18	fn = argument(1) - .5;
532	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
533			errno = EDOM;
534			return(0.0);
535			}
536	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
537	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
538			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
539	greg	2.20	ldist[fn] = -1.0;
540	greg	2.10	if (input[fn].vw.type == 0)
541	greg	2.12	errno = EDOM;
542	greg	2.10	else {
543	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
544	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
545			&input[fn].vw, loc[0], loc[1]);
546	greg	2.10	}
547	greg	2.18	ltick[fn] = eclock;
548	greg	2.10	}
549	greg	2.18	if (nam == vray[i=6])
550			return(ldist[fn]);
551	greg	2.10	while (i--)
552			if (nam == vray[i])
553			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
554			eputs("Bad call to l_ray()!\n");
555	greg	1.15	quit(1);
556	greg	2.17	}
557
558
559			double
560	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
561	greg	2.17	{
562			static unsigned long ltick[MAXINP];
563			static double psize[MAXINP];
564	greg	2.18	FVECT dir0, org, dirx, diry;
565	schorsch	2.25	RREAL locx[2], locy[2];
566	greg	2.17	double d;
567			int fn;
568	greg	2.18	register int i;
569	greg	2.17
570			d = argument(1);
571	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
572	greg	2.17	errno = EDOM;
573			return(0.0);
574			}
575	greg	2.18	fn = d - .5;
576	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
577	greg	2.18	psize[fn] = 0.0;
578			if (input[fn].vw.type == 0)
579	greg	2.17	errno = EDOM;
580	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
581			funvalue(vray[6], 1, &d) >= 0) {
582			for (i = 0; i < 3; i++)
583			dir0[i] = funvalue(vray[3+i], 1, &d);
584			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
585			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
586			if (viewray(org, dirx, &input[fn].vw,
587			locx[0], locx[1]) >= 0 &&
588			viewray(org, diry, &input[fn].vw,
589			locy[0], locy[1]) >= 0) {
590	greg	2.17	/* approximate solid angle */
591	greg	2.18	for (i = 0; i < 3; i++) {
592			dirx[i] -= dir0[i];
593			diry[i] -= dir0[i];
594			}
595			fcross(dir0, dirx, diry);
596	greg	2.22	psize[fn] = sqrt(DOT(dir0,dir0));
597	greg	2.17	}
598			}
599	greg	2.18	ltick[fn] = eclock;
600			}
601	greg	2.17	return(psize[fn]);
602	greg	1.1	}
603
604
605	schorsch	2.29	extern void
606			wputs(char *msg)
607	greg	1.1	{
608			if (!nowarn)
609			eputs(msg);
610			}
611
612
613	schorsch	2.29	extern void
614			eputs(char *msg)
615	greg	1.1	{
616			fputs(msg, stderr);
617			}
618
619
620	schorsch	2.29	extern void
621			quit(int code) /* exit gracefully */
622	greg	2.4	{
623	greg	2.5	register int i;
624			/* close input files */
625			for (i = 0; i < nfiles; i++)
626	greg	2.6	if (input[i].name == Command)
627			pclose(input[i].fp);
628			else
629			fclose(input[i].fp);
630	greg	1.1	exit(code);
631			}