src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.29 2003/10/27 10:24:51 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    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 = "<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);
}


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:	2.30
Committed:	Fri Jan 2 12:47:01 2004 UTC (20 years, 4 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.29:	+7 -3 lines
Log Message:	Fixed typing/prototype of getheader() and its callback.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.30	static const char RCSid[] = "$Id: pcomb.c,v 2.29 2003/10/27 10:24:51 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	2.6	char Command[] = "<Command>";
37	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
38			char vcolout[3][4] = {"ro", "go", "bo"};
39	greg	1.15	char vbrtin[] = "li";
40			char vbrtout[] = "lo";
41	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
42	greg	1.17	char vbrtexp[] = "le";
43	greg	2.18	char vpixaspect[] = "pa";
44	greg	1.1
45	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
46	greg	2.10
47	greg	2.17	char vpsize[] = "S";
48
49	greg	1.18	char vnfiles[] = "nfiles";
50	greg	2.18	char vwhteff[] = "WE";
51	greg	1.18	char vxmax[] = "xmax";
52			char vymax[] = "ymax";
53			char vxres[] = "xres";
54			char vyres[] = "yres";
55			char vxpos[] = "x";
56			char vypos[] = "y";
57	greg	1.1
58			int nowarn = 0; /* no warning messages? */
59
60	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
61	greg	1.9
62	greg	1.18	int xscan, yscan; /* input position */
63	greg	1.1
64	greg	1.18	int xres, yres; /* output resolution */
65	greg	1.1
66	greg	1.18	int xpos, ypos; /* output position */
67
68	greg	2.10	char progname; / global argv[0] */
69
70	greg	1.10	int wrongformat = 0;
71	greg	2.10	int gotview;
72	greg	1.1
73	greg	1.10
74	greg	2.7	extern char *emalloc();
75	greg	1.19
76	schorsch	2.30	static gethfunc tabputs;
77	greg	2.7
78	greg	1.1	main(argc, argv)
79			int argc;
80			char *argv[];
81			{
82	greg	1.18	int original;
83	greg	1.3	double f;
84	greg	1.14	int a, i;
85	schorsch	2.23	SET_DEFAULT_BINARY();
86			SET_FILE_BINARY(stdin);
87			SET_FILE_BINARY(stdout);
88	greg	2.10	progname = argv[0];
89	greg	1.15	/* scan options */
90			for (a = 1; a < argc; a++) {
91	greg	1.1	if (argv[a][0] == '-')
92			switch (argv[a][1]) {
93			case 'x':
94			case 'y':
95	greg	1.18	a++;
96	greg	1.15	continue;
97	greg	1.1	case 'w':
98			nowarn = !nowarn;
99	greg	1.15	continue;
100	greg	1.1	case 'f':
101			case 'e':
102	greg	1.16	a++;
103	greg	1.15	continue;
104	greg	1.1	}
105	greg	1.15	break;
106			}
107	greg	2.14	newheader("RADIANCE", stdout); /* start header */
108	greg	2.22	fputnow(stdout);
109	greg	1.15	/* process files */
110	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
111	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
112	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
113	schorsch	2.26	input[nfiles].vw = stdview;
114	greg	2.17	input[nfiles].pa = 1.0;
115	greg	1.17	}
116	greg	1.1	nfiles = 0;
117	greg	1.18	original = 0;
118	greg	1.1	for ( ; a < argc; a++) {
119			if (nfiles >= MAXINP) {
120			eputs(argv[0]);
121			eputs(": too many picture files\n");
122			quit(1);
123			}
124	greg	1.3	if (argv[a][0] == '-')
125			switch (argv[a][1]) {
126			case '\0':
127			input[nfiles].name = "<stdin>";
128			input[nfiles].fp = stdin;
129			break;
130	greg	1.17	case 'o':
131			original++;
132	greg	1.22	continue;
133	greg	1.3	case 's':
134			f = atof(argv[++a]);
135			scalecolor(input[nfiles].coef, f);
136			continue;
137			case 'c':
138			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
139			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
140			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
141			continue;
142			default:
143			goto usage;
144			}
145			else {
146	greg	2.2	if (argv[a][0] == '!') {
147	greg	2.6	input[nfiles].name = Command;
148	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
149			} else {
150			input[nfiles].name = argv[a];
151			input[nfiles].fp = fopen(argv[a], "r");
152			}
153	greg	1.1	if (input[nfiles].fp == NULL) {
154	greg	1.6	perror(argv[a]);
155	greg	1.1	quit(1);
156			}
157			}
158	greg	1.16	checkfile();
159	greg	1.18	if (original) {
160			colval(input[nfiles].coef,RED) /=
161			colval(input[nfiles].expos,RED);
162			colval(input[nfiles].coef,GRN) /=
163			colval(input[nfiles].expos,GRN);
164			colval(input[nfiles].coef,BLU) /=
165			colval(input[nfiles].expos,BLU);
166	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
167	greg	1.18	}
168			nfiles++;
169	greg	1.17	original = 0;
170	greg	1.15	}
171	greg	1.18	init(); /* set constants */
172	greg	1.15	/* go back and get expressions */
173			for (a = 1; a < argc; a++) {
174			if (argv[a][0] == '-')
175			switch (argv[a][1]) {
176			case 'x':
177	greg	1.21	varset(vxres, ':', eval(argv[++a]));
178	greg	1.18	continue;
179	greg	1.15	case 'y':
180	greg	1.21	varset(vyres, ':', eval(argv[++a]));
181	greg	1.16	continue;
182	greg	1.15	case 'w':
183			continue;
184			case 'f':
185			fcompile(argv[++a]);
186			continue;
187			case 'e':
188			scompile(argv[++a], NULL, 0);
189			continue;
190			}
191			break;
192			}
193	greg	1.18	/* set/get output resolution */
194			if (!vardefined(vxres))
195			varset(vxres, ':', (double)xmax);
196			if (!vardefined(vyres))
197			varset(vyres, ':', (double)ymax);
198			xres = varvalue(vxres) + .5;
199			yres = varvalue(vyres) + .5;
200			if (xres <= 0 \|\| yres <= 0) {
201			eputs(argv[0]);
202			eputs(": illegal output resolution\n");
203			quit(1);
204			}
205	greg	1.15	/* complete header */
206			printargs(argc, argv, stdout);
207	greg	2.16	if (strcmp(ourfmt, PICFMT))
208			fputformat(ourfmt, stdout); /* print format if known */
209	greg	1.15	putchar('\n');
210	greg	1.23	fprtresolu(xres, yres, stdout);
211	greg	1.15	/* combine pictures */
212			combine();
213			quit(0);
214			usage:
215			eputs("Usage: ");
216			eputs(argv[0]);
217			eputs(
218	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
219	greg	1.15	quit(1);
220			}
221
222
223	schorsch	2.30	static int
224			tabputs( /* put out string preceded by a tab */
225			char *s,
226			void *p
227			)
228	greg	1.15	{
229			char fmt[32];
230			double d;
231			COLOR ctmp;
232
233	greg	2.14	if (isheadid(s)) /* header id */
234	gwlarson	2.21	return(0); /* don't echo */
235	greg	2.14	if (formatval(fmt, s)) { /* check format */
236	greg	2.16	if (globmatch(ourfmt, fmt)) {
237			wrongformat = 0;
238			strcpy(ourfmt, fmt);
239			} else
240	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
241	gwlarson	2.21	return(0); /* don't echo */
242	greg	1.17	}
243			if (isexpos(s)) { /* exposure */
244			d = exposval(s);
245			scalecolor(input[nfiles].expos, d);
246			} else if (iscolcor(s)) { /* color correction */
247	greg	1.15	colcorval(ctmp, s);
248	greg	1.17	multcolor(input[nfiles].expos, ctmp);
249	greg	2.18	} else if (isaspect(s))
250	greg	2.17	input[nfiles].pa *= aspectval(s);
251	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
252	greg	2.10	gotview++;
253	greg	1.17	/* echo line */
254			putchar('\t');
255	gwlarson	2.21	return(fputs(s, stdout));
256	greg	1.16	}
257	greg	1.15
258	greg	1.16
259			checkfile() /* ready a file */
260			{
261			register int i;
262			/* process header */
263	greg	2.10	gotview = 0;
264	greg	1.16	fputs(input[nfiles].name, stdout);
265			fputs(":\n", stdout);
266	greg	2.22	getheader(input[nfiles].fp, tabputs, NULL);
267			if (wrongformat < 0) {
268	greg	1.16	eputs(input[nfiles].name);
269	greg	2.22	eputs(": not a Radiance picture\n");
270	greg	1.16	quit(1);
271			}
272	greg	2.22	if (wrongformat > 0) {
273			wputs(input[nfiles].name);
274			wputs(": warning -- incompatible picture format\n");
275			}
276	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
277			input[nfiles].vw.type = 0;
278			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
279	greg	1.16	eputs(input[nfiles].name);
280			eputs(": bad picture size\n");
281			quit(1);
282			}
283	greg	1.18	if (xmax == 0 && ymax == 0) {
284	greg	2.10	xmax = scanlen(&input[nfiles].rs);
285			ymax = numscans(&input[nfiles].rs);
286			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
287			numscans(&input[nfiles].rs) != ymax) {
288	greg	1.16	eputs(input[nfiles].name);
289			eputs(": resolution mismatch\n");
290			quit(1);
291			}
292			/* allocate scanlines */
293			for (i = 0; i < WINSIZ; i++)
294	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
295	greg	1.15	}
296
297
298	greg	2.16	double
299			rgb_bright(clr)
300			COLOR clr;
301			{
302			return(bright(clr));
303			}
304
305
306			double
307			xyz_bright(clr)
308			COLOR clr;
309			{
310			return(clr[CIEY]);
311			}
312
313
314			double (*ourbright)() = rgb_bright;
315
316
317	greg	1.18	init() /* perform final setup */
318	greg	1.15	{
319	greg	2.27	double l_colin(char ), l_expos(char ), l_pixaspect(char *),
320			l_ray(char ), l_psize(char );
321	greg	1.16	register int i;
322	greg	1.15	/* define constants */
323	greg	2.19	varset("PI", ':', PI);
324	greg	1.15	varset(vnfiles, ':', (double)nfiles);
325	greg	1.18	varset(vxmax, ':', (double)xmax);
326			varset(vymax, ':', (double)ymax);
327	greg	1.15	/* set functions */
328			for (i = 0; i < 3; i++) {
329	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
330	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
331			}
332	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
333	greg	1.15	funset(vbrtin, 1, '=', l_colin);
334	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
335			for (i = 0; i < 7; i++)
336	greg	2.10	funset(vray[i], 1, '=', l_ray);
337	greg	2.17	funset(vpsize, 1, '=', l_psize);
338	greg	2.16	/* set brightness function */
339	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
340			varset(vwhteff, ':', 1.0);
341	greg	2.16	ourbright = xyz_bright;
342	greg	2.18	} else
343			varset(vwhteff, ':', WHTEFFICACY);
344	greg	1.1	}
345
346
347			combine() /* combine pictures */
348			{
349	greg	1.8	EPNODE coldef[3], brtdef;
350	greg	1.1	COLOR *scanout;
351	greg	1.8	double d;
352	greg	1.1	register int i, j;
353			/* check defined variables */
354	greg	1.4	for (j = 0; j < 3; j++) {
355			if (vardefined(vcolout[j]))
356			coldef[j] = eparse(vcolout[j]);
357			else
358			coldef[j] = NULL;
359			}
360	greg	1.8	if (vardefined(vbrtout))
361			brtdef = eparse(vbrtout);
362			else
363			brtdef = NULL;
364	greg	1.1	/* allocate scanline */
365			scanout = (COLOR )emalloc(xressizeof(COLOR));
366	greg	1.18	/* set input position */
367			yscan = ymax+MIDSCN;
368	greg	1.1	/* combine files */
369			for (ypos = yres-1; ypos >= 0; ypos--) {
370	greg	1.14	advance();
371	greg	1.11	varset(vypos, '=', (double)ypos);
372	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
373	greg	1.18	xscan = (long)xpos*xmax/xres;
374	greg	1.11	varset(vxpos, '=', (double)xpos);
375	greg	1.8	eclock++;
376			if (brtdef != NULL) {
377			d = evalue(brtdef);
378			if (d < 0.0)
379			d = 0.0;
380			setcolor(scanout[xpos], d, d, d);
381			} else {
382			for (j = 0; j < 3; j++) {
383			if (coldef[j] != NULL) {
384	greg	1.13	d = evalue(coldef[j]);
385	greg	1.8	} else {
386	greg	1.13	d = 0.0;
387	greg	1.8	for (i = 0; i < nfiles; i++)
388	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
389	greg	1.1	}
390	greg	1.13	if (d < 0.0)
391			d = 0.0;
392			colval(scanout[xpos],j) = d;
393	greg	1.8	}
394	greg	1.1	}
395	greg	1.8	}
396			if (fwritescan(scanout, xres, stdout) < 0) {
397			perror("write error");
398			quit(1);
399			}
400	greg	1.1	}
401	greg	2.22	efree((char *)scanout);
402	greg	1.1	}
403
404
405	greg	1.18	advance() /* read in data for next scanline */
406	greg	1.14	{
407	greg	1.18	int ytarget;
408	greg	1.14	register COLOR *st;
409			register int i, j;
410
411	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
412			for (i = 0; i < nfiles; i++) {
413			st = input[i].scan[WINSIZ-1];
414			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
415			input[i].scan[j] = input[i].scan[j-1];
416			input[i].scan[0] = st;
417			if (yscan <= MIDSCN) /* hit bottom? */
418			continue;
419	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
420	greg	1.18	eputs(input[i].name);
421			eputs(": read error\n");
422			quit(1);
423			}
424	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
425			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
426			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
427			for (j = 0; j < xmax; j++) /* adjust color */
428			multcolor(st[j], input[i].coef);
429	greg	1.14	}
430			}
431
432
433	greg	1.1	double
434	greg	1.17	l_expos(nam) /* return picture exposure */
435	greg	1.15	register char *nam;
436	greg	1.1	{
437	greg	1.15	register int fn, n;
438	greg	1.14
439	greg	1.18	fn = argument(1) - .5;
440			if (fn < 0 \|\| fn >= nfiles)
441			return(1.0);
442	greg	1.17	if (nam == vbrtexp)
443	greg	2.16	return((*ourbright)(input[fn].expos));
444	greg	1.15	n = 3;
445			while (n--)
446	greg	1.17	if (nam == vcolexp[n])
447			return(colval(input[fn].expos,n));
448			eputs("Bad call to l_expos()!\n");
449	greg	1.15	quit(1);
450			}
451
452
453			double
454	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
455	greg	2.18	{
456			register int fn;
457
458			fn = argument(1) - .5;
459			if (fn < 0 \|\| fn >= nfiles)
460			return(1.0);
461			return(input[fn].pa);
462			}
463
464
465			double
466	greg	1.15	l_colin(nam) /* return color value for picture */
467			register char *nam;
468			{
469			int fn;
470			register int n, xoff, yoff;
471			double d;
472
473	greg	2.18	fn = argument(1) - .5;
474	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
475	greg	1.15	errno = EDOM;
476			return(0.0);
477			}
478	greg	1.14	xoff = yoff = 0;
479			n = nargum();
480			if (n >= 2) {
481			d = argument(2);
482			if (d < 0.0) {
483			xoff = d-.5;
484	greg	1.18	if (xscan+xoff < 0)
485			xoff = -xscan;
486	greg	1.14	} else {
487			xoff = d+.5;
488	greg	1.18	if (xscan+xoff >= xmax)
489			xoff = xmax-1-xscan;
490	greg	1.14	}
491			}
492			if (n >= 3) {
493			d = argument(3);
494			if (d < 0.0) {
495			yoff = d-.5;
496			if (yoff+MIDSCN < 0)
497			yoff = -MIDSCN;
498	greg	1.18	if (yscan+yoff < 0)
499			yoff = -yscan;
500	greg	1.14	} else {
501			yoff = d+.5;
502			if (yoff+MIDSCN >= WINSIZ)
503			yoff = WINSIZ-1-MIDSCN;
504	greg	1.18	if (yscan+yoff >= ymax)
505			yoff = ymax-1-yscan;
506	greg	1.14	}
507			}
508	greg	1.15	if (nam == vbrtin)
509	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
510	greg	1.15	n = 3;
511			while (n--)
512			if (nam == vcolin[n])
513	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
514	greg	1.15	eputs("Bad call to l_colin()!\n");
515	greg	2.10	quit(1);
516			}
517
518
519			double
520			l_ray(nam) /* return ray origin or direction */
521			register char *nam;
522			{
523	greg	2.15	static unsigned long ltick[MAXINP];
524	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
525	greg	2.18	static double ldist[MAXINP];
526	schorsch	2.25	RREAL loc[2];
527	greg	2.10	int fn;
528			register int i;
529
530	greg	2.18	fn = argument(1) - .5;
531	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
532			errno = EDOM;
533			return(0.0);
534			}
535	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
536	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
537			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
538	greg	2.20	ldist[fn] = -1.0;
539	greg	2.10	if (input[fn].vw.type == 0)
540	greg	2.12	errno = EDOM;
541	greg	2.10	else {
542	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
543	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
544			&input[fn].vw, loc[0], loc[1]);
545	greg	2.10	}
546	greg	2.18	ltick[fn] = eclock;
547	greg	2.10	}
548	greg	2.18	if (nam == vray[i=6])
549			return(ldist[fn]);
550	greg	2.10	while (i--)
551			if (nam == vray[i])
552			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
553			eputs("Bad call to l_ray()!\n");
554	greg	1.15	quit(1);
555	greg	2.17	}
556
557
558			double
559	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
560	greg	2.17	{
561			static unsigned long ltick[MAXINP];
562			static double psize[MAXINP];
563	greg	2.18	FVECT dir0, org, dirx, diry;
564	schorsch	2.25	RREAL locx[2], locy[2];
565	greg	2.17	double d;
566			int fn;
567	greg	2.18	register int i;
568	greg	2.17
569			d = argument(1);
570	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
571	greg	2.17	errno = EDOM;
572			return(0.0);
573			}
574	greg	2.18	fn = d - .5;
575	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
576	greg	2.18	psize[fn] = 0.0;
577			if (input[fn].vw.type == 0)
578	greg	2.17	errno = EDOM;
579	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
580			funvalue(vray[6], 1, &d) >= 0) {
581			for (i = 0; i < 3; i++)
582			dir0[i] = funvalue(vray[3+i], 1, &d);
583			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
584			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
585			if (viewray(org, dirx, &input[fn].vw,
586			locx[0], locx[1]) >= 0 &&
587			viewray(org, diry, &input[fn].vw,
588			locy[0], locy[1]) >= 0) {
589	greg	2.17	/* approximate solid angle */
590	greg	2.18	for (i = 0; i < 3; i++) {
591			dirx[i] -= dir0[i];
592			diry[i] -= dir0[i];
593			}
594			fcross(dir0, dirx, diry);
595	greg	2.22	psize[fn] = sqrt(DOT(dir0,dir0));
596	greg	2.17	}
597			}
598	greg	2.18	ltick[fn] = eclock;
599			}
600	greg	2.17	return(psize[fn]);
601	greg	1.1	}
602
603
604	schorsch	2.29	extern void
605			wputs(char *msg)
606	greg	1.1	{
607			if (!nowarn)
608			eputs(msg);
609			}
610
611
612	schorsch	2.29	extern void
613			eputs(char *msg)
614	greg	1.1	{
615			fputs(msg, stderr);
616			}
617
618
619	schorsch	2.29	extern void
620			quit(int code) /* exit gracefully */
621	greg	2.4	{
622	greg	2.5	register int i;
623			/* close input files */
624			for (i = 0; i < nfiles; i++)
625	greg	2.6	if (input[i].name == Command)
626			pclose(input[i].fp);
627			else
628			fclose(input[i].fp);
629	greg	1.1	exit(code);
630			}