src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.31 2004/03/15 21:16:54 greg Exp $";
#endif
/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

#include "platform.h"
#include "rtprocess.h"
#include "rterror.h"
#include "rtmisc.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;


static gethfunc tabputs;
static void checkfile(void);
static double rgb_bright(COLOR  clr);
static double xyz_bright(COLOR  clr);
static void init(void);
static void combine(void);
static void advance(void);
static double l_expos(char      *nam);
static double l_pixaspect(char *nm);
static double l_colin(char      *nam);
static double l_ray(char        *nam);
static double l_psize(char *nm);


int
main(
        int     argc,
        char    *argv[]
)
{
        int     original;
        double  f;
        int     a;
        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);
        return 1; /* pro forma return */
}


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));
}


static void
checkfile(void)                 /* 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));
}


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


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


double  (*ourbright)() = rgb_bright;


static void
init(void)                                      /* 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);
}


static void
combine(void)                   /* 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);
}


static void
advance(void)                   /* 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);
                }
}


static double
l_expos(                        /* 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);
        return 1; /* pro forma return */
}


static 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);
}


static double
l_colin(                        /* 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);
        return 1; /* pro forma return */
}


static double
l_ray(          /* 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);
        return 1; /* pro forma return */
}


static 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:	2.32
Committed:	Sun Mar 28 20:33:14 2004 UTC (20 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.31:	+55 -29 lines
Log Message:	Continued ANSIfication, and other fixes and clarifications.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.32	static const char RCSid[] = "$Id: pcomb.c,v 2.31 2004/03/15 21:16:54 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* Combine picture files according to calcomp functions.
6			*
7			* 1/4/89
8			*/
9
10	greg	2.28	#include "platform.h"
11	schorsch	2.29	#include "rtprocess.h"
12			#include "rterror.h"
13	schorsch	2.32	#include "rtmisc.h"
14	greg	1.1	#include "color.h"
15			#include "calcomp.h"
16	greg	2.10	#include "view.h"
17
18	greg	1.6	#define MAXINP 32 /* maximum number of input files */
19	greg	2.22	#define WINSIZ 64 /* scanline window size */
20	greg	2.13	#define MIDSCN ((WINSIZ-1)/2+1)
21	greg	1.1
22			struct {
23	greg	1.19	char name; / file or command name */
24	greg	1.1	FILE fp; / stream pointer */
25	greg	2.10	VIEW vw; /* view for picture */
26			RESOLU rs; /* image resolution and orientation */
27	greg	2.17	float pa; /* pixel aspect ratio */
28	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
29	greg	1.3	COLOR coef; /* coefficient */
30	greg	1.17	COLOR expos; /* recorded exposure */
31	greg	1.1	} input[MAXINP]; /* input pictures */
32
33			int nfiles; /* number of input files */
34
35	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
36
37	greg	2.31	char StandardInput[] = "<stdin>";
38	greg	2.6	char Command[] = "<Command>";
39	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
40			char vcolout[3][4] = {"ro", "go", "bo"};
41	greg	1.15	char vbrtin[] = "li";
42			char vbrtout[] = "lo";
43	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
44	greg	1.17	char vbrtexp[] = "le";
45	greg	2.18	char vpixaspect[] = "pa";
46	greg	1.1
47	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
48	greg	2.10
49	greg	2.17	char vpsize[] = "S";
50
51	greg	1.18	char vnfiles[] = "nfiles";
52	greg	2.18	char vwhteff[] = "WE";
53	greg	1.18	char vxmax[] = "xmax";
54			char vymax[] = "ymax";
55			char vxres[] = "xres";
56			char vyres[] = "yres";
57			char vxpos[] = "x";
58			char vypos[] = "y";
59	greg	1.1
60			int nowarn = 0; /* no warning messages? */
61
62	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
63	greg	1.9
64	greg	1.18	int xscan, yscan; /* input position */
65	greg	1.1
66	greg	1.18	int xres, yres; /* output resolution */
67	greg	1.1
68	greg	1.18	int xpos, ypos; /* output position */
69
70	greg	2.10	char progname; / global argv[0] */
71
72	greg	1.10	int wrongformat = 0;
73	greg	2.10	int gotview;
74	greg	1.1
75	greg	1.10
76	schorsch	2.30	static gethfunc tabputs;
77	schorsch	2.32	static void checkfile(void);
78			static double rgb_bright(COLOR clr);
79			static double xyz_bright(COLOR clr);
80			static void init(void);
81			static void combine(void);
82			static void advance(void);
83			static double l_expos(char *nam);
84			static double l_pixaspect(char *nm);
85			static double l_colin(char *nam);
86			static double l_ray(char *nam);
87			static double l_psize(char *nm);
88
89
90			int
91			main(
92			int argc,
93			char *argv[]
94			)
95	greg	1.1	{
96	greg	1.18	int original;
97	greg	1.3	double f;
98	schorsch	2.32	int a;
99	schorsch	2.23	SET_DEFAULT_BINARY();
100			SET_FILE_BINARY(stdin);
101			SET_FILE_BINARY(stdout);
102	greg	2.10	progname = argv[0];
103	greg	1.15	/* scan options */
104			for (a = 1; a < argc; a++) {
105	greg	1.1	if (argv[a][0] == '-')
106			switch (argv[a][1]) {
107			case 'x':
108			case 'y':
109	greg	1.18	a++;
110	greg	1.15	continue;
111	greg	1.1	case 'w':
112			nowarn = !nowarn;
113	greg	1.15	continue;
114	greg	1.1	case 'f':
115			case 'e':
116	greg	1.16	a++;
117	greg	1.15	continue;
118	greg	1.1	}
119	greg	1.15	break;
120			}
121	greg	2.14	newheader("RADIANCE", stdout); /* start header */
122	greg	2.22	fputnow(stdout);
123	greg	1.15	/* process files */
124	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
125	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
126	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
127	schorsch	2.26	input[nfiles].vw = stdview;
128	greg	2.17	input[nfiles].pa = 1.0;
129	greg	1.17	}
130	greg	1.1	nfiles = 0;
131	greg	1.18	original = 0;
132	greg	1.1	for ( ; a < argc; a++) {
133			if (nfiles >= MAXINP) {
134			eputs(argv[0]);
135			eputs(": too many picture files\n");
136			quit(1);
137			}
138	greg	1.3	if (argv[a][0] == '-')
139			switch (argv[a][1]) {
140			case '\0':
141	greg	2.31	input[nfiles].name = StandardInput;
142	greg	1.3	input[nfiles].fp = stdin;
143			break;
144	greg	1.17	case 'o':
145			original++;
146	greg	1.22	continue;
147	greg	1.3	case 's':
148			f = atof(argv[++a]);
149			scalecolor(input[nfiles].coef, f);
150			continue;
151			case 'c':
152			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
153			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
154			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
155			continue;
156			default:
157			goto usage;
158			}
159			else {
160	greg	2.2	if (argv[a][0] == '!') {
161	greg	2.6	input[nfiles].name = Command;
162	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
163			} else {
164			input[nfiles].name = argv[a];
165			input[nfiles].fp = fopen(argv[a], "r");
166			}
167	greg	1.1	if (input[nfiles].fp == NULL) {
168	greg	1.6	perror(argv[a]);
169	greg	1.1	quit(1);
170			}
171			}
172	greg	1.16	checkfile();
173	greg	1.18	if (original) {
174			colval(input[nfiles].coef,RED) /=
175			colval(input[nfiles].expos,RED);
176			colval(input[nfiles].coef,GRN) /=
177			colval(input[nfiles].expos,GRN);
178			colval(input[nfiles].coef,BLU) /=
179			colval(input[nfiles].expos,BLU);
180	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
181	greg	1.18	}
182			nfiles++;
183	greg	1.17	original = 0;
184	greg	1.15	}
185	greg	1.18	init(); /* set constants */
186	greg	1.15	/* go back and get expressions */
187			for (a = 1; a < argc; a++) {
188			if (argv[a][0] == '-')
189			switch (argv[a][1]) {
190			case 'x':
191	greg	1.21	varset(vxres, ':', eval(argv[++a]));
192	greg	1.18	continue;
193	greg	1.15	case 'y':
194	greg	1.21	varset(vyres, ':', eval(argv[++a]));
195	greg	1.16	continue;
196	greg	1.15	case 'w':
197			continue;
198			case 'f':
199			fcompile(argv[++a]);
200			continue;
201			case 'e':
202			scompile(argv[++a], NULL, 0);
203			continue;
204			}
205			break;
206			}
207	greg	1.18	/* set/get output resolution */
208			if (!vardefined(vxres))
209			varset(vxres, ':', (double)xmax);
210			if (!vardefined(vyres))
211			varset(vyres, ':', (double)ymax);
212			xres = varvalue(vxres) + .5;
213			yres = varvalue(vyres) + .5;
214			if (xres <= 0 \|\| yres <= 0) {
215			eputs(argv[0]);
216			eputs(": illegal output resolution\n");
217			quit(1);
218			}
219	greg	1.15	/* complete header */
220			printargs(argc, argv, stdout);
221	greg	2.16	if (strcmp(ourfmt, PICFMT))
222			fputformat(ourfmt, stdout); /* print format if known */
223	greg	1.15	putchar('\n');
224	greg	1.23	fprtresolu(xres, yres, stdout);
225	greg	1.15	/* combine pictures */
226			combine();
227			quit(0);
228			usage:
229			eputs("Usage: ");
230			eputs(argv[0]);
231			eputs(
232	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
233	greg	1.15	quit(1);
234	schorsch	2.32	return 1; /* pro forma return */
235	greg	1.15	}
236
237
238	schorsch	2.30	static int
239			tabputs( /* put out string preceded by a tab */
240			char *s,
241			void *p
242			)
243	greg	1.15	{
244			char fmt[32];
245			double d;
246			COLOR ctmp;
247
248	greg	2.14	if (isheadid(s)) /* header id */
249	gwlarson	2.21	return(0); /* don't echo */
250	greg	2.14	if (formatval(fmt, s)) { /* check format */
251	greg	2.16	if (globmatch(ourfmt, fmt)) {
252			wrongformat = 0;
253			strcpy(ourfmt, fmt);
254			} else
255	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
256	gwlarson	2.21	return(0); /* don't echo */
257	greg	1.17	}
258			if (isexpos(s)) { /* exposure */
259			d = exposval(s);
260			scalecolor(input[nfiles].expos, d);
261			} else if (iscolcor(s)) { /* color correction */
262	greg	1.15	colcorval(ctmp, s);
263	greg	1.17	multcolor(input[nfiles].expos, ctmp);
264	greg	2.18	} else if (isaspect(s))
265	greg	2.17	input[nfiles].pa *= aspectval(s);
266	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
267	greg	2.10	gotview++;
268	greg	1.17	/* echo line */
269			putchar('\t');
270	gwlarson	2.21	return(fputs(s, stdout));
271	greg	1.16	}
272	greg	1.15
273	greg	1.16
274	schorsch	2.32	static void
275			checkfile(void) /* ready a file */
276	greg	1.16	{
277			register int i;
278			/* process header */
279	greg	2.10	gotview = 0;
280	greg	1.16	fputs(input[nfiles].name, stdout);
281			fputs(":\n", stdout);
282	greg	2.22	getheader(input[nfiles].fp, tabputs, NULL);
283			if (wrongformat < 0) {
284	greg	1.16	eputs(input[nfiles].name);
285	greg	2.22	eputs(": not a Radiance picture\n");
286	greg	1.16	quit(1);
287			}
288	greg	2.22	if (wrongformat > 0) {
289			wputs(input[nfiles].name);
290			wputs(": warning -- incompatible picture format\n");
291			}
292	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
293			input[nfiles].vw.type = 0;
294			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
295	greg	1.16	eputs(input[nfiles].name);
296			eputs(": bad picture size\n");
297			quit(1);
298			}
299	greg	1.18	if (xmax == 0 && ymax == 0) {
300	greg	2.10	xmax = scanlen(&input[nfiles].rs);
301			ymax = numscans(&input[nfiles].rs);
302			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
303			numscans(&input[nfiles].rs) != ymax) {
304	greg	1.16	eputs(input[nfiles].name);
305			eputs(": resolution mismatch\n");
306			quit(1);
307			}
308			/* allocate scanlines */
309			for (i = 0; i < WINSIZ; i++)
310	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
311	greg	1.15	}
312
313
314	schorsch	2.32	static double
315			rgb_bright(
316			COLOR clr
317			)
318	greg	2.16	{
319			return(bright(clr));
320			}
321
322
323	schorsch	2.32	static double
324			xyz_bright(
325			COLOR clr
326			)
327	greg	2.16	{
328			return(clr[CIEY]);
329			}
330
331
332			double (*ourbright)() = rgb_bright;
333
334
335	schorsch	2.32	static void
336			init(void) /* perform final setup */
337	greg	1.15	{
338	greg	2.27	double l_colin(char ), l_expos(char ), l_pixaspect(char *),
339			l_ray(char ), l_psize(char );
340	greg	1.16	register int i;
341	greg	1.15	/* define constants */
342	greg	2.19	varset("PI", ':', PI);
343	greg	1.15	varset(vnfiles, ':', (double)nfiles);
344	greg	1.18	varset(vxmax, ':', (double)xmax);
345			varset(vymax, ':', (double)ymax);
346	greg	1.15	/* set functions */
347			for (i = 0; i < 3; i++) {
348	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
349	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
350			}
351	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
352	greg	1.15	funset(vbrtin, 1, '=', l_colin);
353	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
354			for (i = 0; i < 7; i++)
355	greg	2.10	funset(vray[i], 1, '=', l_ray);
356	greg	2.17	funset(vpsize, 1, '=', l_psize);
357	greg	2.16	/* set brightness function */
358	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
359			varset(vwhteff, ':', 1.0);
360	greg	2.16	ourbright = xyz_bright;
361	greg	2.18	} else
362			varset(vwhteff, ':', WHTEFFICACY);
363	greg	1.1	}
364
365
366	schorsch	2.32	static void
367			combine(void) /* combine pictures */
368	greg	1.1	{
369	greg	1.8	EPNODE coldef[3], brtdef;
370	greg	1.1	COLOR *scanout;
371	greg	1.8	double d;
372	greg	1.1	register int i, j;
373			/* check defined variables */
374	greg	1.4	for (j = 0; j < 3; j++) {
375			if (vardefined(vcolout[j]))
376			coldef[j] = eparse(vcolout[j]);
377			else
378			coldef[j] = NULL;
379			}
380	greg	1.8	if (vardefined(vbrtout))
381			brtdef = eparse(vbrtout);
382			else
383			brtdef = NULL;
384	greg	1.1	/* allocate scanline */
385			scanout = (COLOR )emalloc(xressizeof(COLOR));
386	greg	1.18	/* set input position */
387			yscan = ymax+MIDSCN;
388	greg	1.1	/* combine files */
389			for (ypos = yres-1; ypos >= 0; ypos--) {
390	greg	1.14	advance();
391	greg	1.11	varset(vypos, '=', (double)ypos);
392	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
393	greg	1.18	xscan = (long)xpos*xmax/xres;
394	greg	1.11	varset(vxpos, '=', (double)xpos);
395	greg	1.8	eclock++;
396			if (brtdef != NULL) {
397			d = evalue(brtdef);
398			if (d < 0.0)
399			d = 0.0;
400			setcolor(scanout[xpos], d, d, d);
401			} else {
402			for (j = 0; j < 3; j++) {
403			if (coldef[j] != NULL) {
404	greg	1.13	d = evalue(coldef[j]);
405	greg	1.8	} else {
406	greg	1.13	d = 0.0;
407	greg	1.8	for (i = 0; i < nfiles; i++)
408	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
409	greg	1.1	}
410	greg	1.13	if (d < 0.0)
411			d = 0.0;
412			colval(scanout[xpos],j) = d;
413	greg	1.8	}
414	greg	1.1	}
415	greg	1.8	}
416			if (fwritescan(scanout, xres, stdout) < 0) {
417			perror("write error");
418			quit(1);
419			}
420	greg	1.1	}
421	greg	2.22	efree((char *)scanout);
422	greg	1.1	}
423
424
425	schorsch	2.32	static void
426			advance(void) /* read in data for next scanline */
427	greg	1.14	{
428	greg	1.18	int ytarget;
429	greg	1.14	register COLOR *st;
430			register int i, j;
431
432	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
433			for (i = 0; i < nfiles; i++) {
434			st = input[i].scan[WINSIZ-1];
435			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
436			input[i].scan[j] = input[i].scan[j-1];
437			input[i].scan[0] = st;
438			if (yscan <= MIDSCN) /* hit bottom? */
439			continue;
440	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
441	greg	1.18	eputs(input[i].name);
442			eputs(": read error\n");
443			quit(1);
444			}
445	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
446			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
447			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
448			for (j = 0; j < xmax; j++) /* adjust color */
449			multcolor(st[j], input[i].coef);
450	greg	1.14	}
451			}
452
453
454	schorsch	2.32	static double
455			l_expos( /* return picture exposure */
456			register char *nam
457			)
458	greg	1.1	{
459	greg	1.15	register int fn, n;
460	greg	1.14
461	greg	1.18	fn = argument(1) - .5;
462			if (fn < 0 \|\| fn >= nfiles)
463			return(1.0);
464	greg	1.17	if (nam == vbrtexp)
465	greg	2.16	return((*ourbright)(input[fn].expos));
466	greg	1.15	n = 3;
467			while (n--)
468	greg	1.17	if (nam == vcolexp[n])
469			return(colval(input[fn].expos,n));
470			eputs("Bad call to l_expos()!\n");
471	greg	1.15	quit(1);
472	schorsch	2.32	return 1; /* pro forma return */
473	greg	1.15	}
474
475
476	schorsch	2.32	static double
477	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
478	greg	2.18	{
479			register int fn;
480
481			fn = argument(1) - .5;
482			if (fn < 0 \|\| fn >= nfiles)
483			return(1.0);
484			return(input[fn].pa);
485			}
486
487
488	schorsch	2.32	static double
489			l_colin( /* return color value for picture */
490			register char *nam
491			)
492	greg	1.15	{
493			int fn;
494			register int n, xoff, yoff;
495			double d;
496
497	greg	2.18	fn = argument(1) - .5;
498	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
499	greg	1.15	errno = EDOM;
500			return(0.0);
501			}
502	greg	1.14	xoff = yoff = 0;
503			n = nargum();
504			if (n >= 2) {
505			d = argument(2);
506			if (d < 0.0) {
507			xoff = d-.5;
508	greg	1.18	if (xscan+xoff < 0)
509			xoff = -xscan;
510	greg	1.14	} else {
511			xoff = d+.5;
512	greg	1.18	if (xscan+xoff >= xmax)
513			xoff = xmax-1-xscan;
514	greg	1.14	}
515			}
516			if (n >= 3) {
517			d = argument(3);
518			if (d < 0.0) {
519			yoff = d-.5;
520			if (yoff+MIDSCN < 0)
521			yoff = -MIDSCN;
522	greg	1.18	if (yscan+yoff < 0)
523			yoff = -yscan;
524	greg	1.14	} else {
525			yoff = d+.5;
526			if (yoff+MIDSCN >= WINSIZ)
527			yoff = WINSIZ-1-MIDSCN;
528	greg	1.18	if (yscan+yoff >= ymax)
529			yoff = ymax-1-yscan;
530	greg	1.14	}
531			}
532	greg	1.15	if (nam == vbrtin)
533	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
534	greg	1.15	n = 3;
535			while (n--)
536			if (nam == vcolin[n])
537	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
538	greg	1.15	eputs("Bad call to l_colin()!\n");
539	greg	2.10	quit(1);
540	schorsch	2.32	return 1; /* pro forma return */
541	greg	2.10	}
542
543
544	schorsch	2.32	static double
545			l_ray( /* return ray origin or direction */
546			register char *nam
547			)
548	greg	2.10	{
549	greg	2.15	static unsigned long ltick[MAXINP];
550	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
551	greg	2.18	static double ldist[MAXINP];
552	schorsch	2.25	RREAL loc[2];
553	greg	2.10	int fn;
554			register int i;
555
556	greg	2.18	fn = argument(1) - .5;
557	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
558			errno = EDOM;
559			return(0.0);
560			}
561	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
562	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
563			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
564	greg	2.20	ldist[fn] = -1.0;
565	greg	2.10	if (input[fn].vw.type == 0)
566	greg	2.12	errno = EDOM;
567	greg	2.10	else {
568	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
569	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
570			&input[fn].vw, loc[0], loc[1]);
571	greg	2.10	}
572	greg	2.18	ltick[fn] = eclock;
573	greg	2.10	}
574	greg	2.18	if (nam == vray[i=6])
575			return(ldist[fn]);
576	greg	2.10	while (i--)
577			if (nam == vray[i])
578			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
579			eputs("Bad call to l_ray()!\n");
580	greg	1.15	quit(1);
581	schorsch	2.32	return 1; /* pro forma return */
582	greg	2.17	}
583
584
585	schorsch	2.32	static double
586	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
587	greg	2.17	{
588			static unsigned long ltick[MAXINP];
589			static double psize[MAXINP];
590	greg	2.18	FVECT dir0, org, dirx, diry;
591	schorsch	2.25	RREAL locx[2], locy[2];
592	greg	2.17	double d;
593			int fn;
594	greg	2.18	register int i;
595	greg	2.17
596			d = argument(1);
597	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
598	greg	2.17	errno = EDOM;
599			return(0.0);
600			}
601	greg	2.18	fn = d - .5;
602	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
603	greg	2.18	psize[fn] = 0.0;
604			if (input[fn].vw.type == 0)
605	greg	2.17	errno = EDOM;
606	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
607			funvalue(vray[6], 1, &d) >= 0) {
608			for (i = 0; i < 3; i++)
609			dir0[i] = funvalue(vray[3+i], 1, &d);
610			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
611			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
612			if (viewray(org, dirx, &input[fn].vw,
613			locx[0], locx[1]) >= 0 &&
614			viewray(org, diry, &input[fn].vw,
615			locy[0], locy[1]) >= 0) {
616	greg	2.17	/* approximate solid angle */
617	greg	2.18	for (i = 0; i < 3; i++) {
618			dirx[i] -= dir0[i];
619			diry[i] -= dir0[i];
620			}
621			fcross(dir0, dirx, diry);
622	greg	2.22	psize[fn] = sqrt(DOT(dir0,dir0));
623	greg	2.17	}
624			}
625	greg	2.18	ltick[fn] = eclock;
626			}
627	greg	2.17	return(psize[fn]);
628	greg	1.1	}
629
630
631	schorsch	2.29	extern void
632			wputs(char *msg)
633	greg	1.1	{
634			if (!nowarn)
635			eputs(msg);
636			}
637
638
639	schorsch	2.29	extern void
640			eputs(char *msg)
641	greg	1.1	{
642			fputs(msg, stderr);
643			}
644
645
646	schorsch	2.29	extern void
647			quit(int code) /* exit gracefully */
648	greg	2.4	{
649	greg	2.5	register int i;
650			/* close input files */
651			for (i = 0; i < nfiles; i++)
652	greg	2.6	if (input[i].name == Command)
653			pclose(input[i].fp);
654			else
655			fclose(input[i].fp);
656	greg	1.1	exit(code);
657			}