src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.38 2005/05/25 04:44:25 greg Exp $";
#endif
/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

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

#define MAXINP          512             /* 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     echoheader = 1;
int     wrongformat = 0;
int     gotview;


static gethfunc headline;
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 'h':
                                echoheader = !echoheader;
                                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][-h][-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
headline(                       /* check header line & echo if requested */
        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++;

        if (echoheader) {                       /* echo line */
                putchar('\t');
                return(fputs(s, stdout));
        }
        return(0);
}


static void
checkfile(void)                 /* ready a file */
{
        register int    i;
                                        /* process header */
        gotview = 0;
        if (echoheader) {
                fputs(input[nfiles].name, stdout);
                fputs(":\n", stdout);
        }
        getheader(input[nfiles].fp, headline, 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 */
{
        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);
                        }
                        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) >= -FTINY) {
                        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]) >= -FTINY &&
                                        viewray(org, diry, &input[fn].vw,
                                        locy[0], locy[1]) >= -FTINY) {
                                                /* approximate solid angle */
                                for (i = 0; i < 3; i++) {
                                        dirx[i] -= dir0[i];
                                        diry[i] -= dir0[i];
                                }
                                fcross(dir0, dirx, diry);
                                psize[fn] = VLEN(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:	2.39
Committed:	Fri Sep 8 21:38:25 2006 UTC (17 years, 7 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R8
Changes since 2.38:	+19 -10 lines
Log Message:	Added -h option to pcompos and pcomb to avoid uncontrolled header growth
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.39	static const char RCSid[] = "$Id: pcomb.c,v 2.38 2005/05/25 04:44:25 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	greg	2.33	#include "standard.h"
12	schorsch	2.29	#include "rtprocess.h"
13	greg	1.1	#include "color.h"
14			#include "calcomp.h"
15	greg	2.10	#include "view.h"
16
17	greg	2.38	#define MAXINP 512 /* 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	2.39	int echoheader = 1;
72	greg	1.10	int wrongformat = 0;
73	greg	2.10	int gotview;
74	greg	1.1
75	greg	1.10
76	greg	2.39	static gethfunc headline;
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	2.39	case 'h':
115			echoheader = !echoheader;
116			continue;
117	greg	1.1	case 'f':
118			case 'e':
119	greg	1.16	a++;
120	greg	1.15	continue;
121	greg	1.1	}
122	greg	1.15	break;
123			}
124	greg	2.14	newheader("RADIANCE", stdout); /* start header */
125	greg	2.22	fputnow(stdout);
126	greg	1.15	/* process files */
127	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
128	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
129	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
130	schorsch	2.26	input[nfiles].vw = stdview;
131	greg	2.17	input[nfiles].pa = 1.0;
132	greg	1.17	}
133	greg	1.1	nfiles = 0;
134	greg	1.18	original = 0;
135	greg	1.1	for ( ; a < argc; a++) {
136			if (nfiles >= MAXINP) {
137			eputs(argv[0]);
138			eputs(": too many picture files\n");
139			quit(1);
140			}
141	greg	1.3	if (argv[a][0] == '-')
142			switch (argv[a][1]) {
143			case '\0':
144	greg	2.31	input[nfiles].name = StandardInput;
145	greg	1.3	input[nfiles].fp = stdin;
146			break;
147	greg	1.17	case 'o':
148			original++;
149	greg	1.22	continue;
150	greg	1.3	case 's':
151			f = atof(argv[++a]);
152			scalecolor(input[nfiles].coef, f);
153			continue;
154			case 'c':
155			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
156			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
157			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
158			continue;
159			default:
160			goto usage;
161			}
162			else {
163	greg	2.2	if (argv[a][0] == '!') {
164	greg	2.6	input[nfiles].name = Command;
165	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
166			} else {
167			input[nfiles].name = argv[a];
168			input[nfiles].fp = fopen(argv[a], "r");
169			}
170	greg	1.1	if (input[nfiles].fp == NULL) {
171	greg	1.6	perror(argv[a]);
172	greg	1.1	quit(1);
173			}
174			}
175	greg	1.16	checkfile();
176	greg	1.18	if (original) {
177			colval(input[nfiles].coef,RED) /=
178			colval(input[nfiles].expos,RED);
179			colval(input[nfiles].coef,GRN) /=
180			colval(input[nfiles].expos,GRN);
181			colval(input[nfiles].coef,BLU) /=
182			colval(input[nfiles].expos,BLU);
183	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
184	greg	1.18	}
185			nfiles++;
186	greg	1.17	original = 0;
187	greg	1.15	}
188	greg	1.18	init(); /* set constants */
189	greg	1.15	/* go back and get expressions */
190			for (a = 1; a < argc; a++) {
191			if (argv[a][0] == '-')
192			switch (argv[a][1]) {
193			case 'x':
194	greg	1.21	varset(vxres, ':', eval(argv[++a]));
195	greg	1.18	continue;
196	greg	1.15	case 'y':
197	greg	1.21	varset(vyres, ':', eval(argv[++a]));
198	greg	1.16	continue;
199	greg	1.15	case 'w':
200			continue;
201			case 'f':
202			fcompile(argv[++a]);
203			continue;
204			case 'e':
205			scompile(argv[++a], NULL, 0);
206			continue;
207			}
208			break;
209			}
210	greg	1.18	/* set/get output resolution */
211			if (!vardefined(vxres))
212			varset(vxres, ':', (double)xmax);
213			if (!vardefined(vyres))
214			varset(vyres, ':', (double)ymax);
215			xres = varvalue(vxres) + .5;
216			yres = varvalue(vyres) + .5;
217			if (xres <= 0 \|\| yres <= 0) {
218			eputs(argv[0]);
219			eputs(": illegal output resolution\n");
220			quit(1);
221			}
222	greg	1.15	/* complete header */
223			printargs(argc, argv, stdout);
224	greg	2.16	if (strcmp(ourfmt, PICFMT))
225			fputformat(ourfmt, stdout); /* print format if known */
226	greg	1.15	putchar('\n');
227	greg	1.23	fprtresolu(xres, yres, stdout);
228	greg	1.15	/* combine pictures */
229			combine();
230			quit(0);
231			usage:
232			eputs("Usage: ");
233			eputs(argv[0]);
234			eputs(
235	greg	2.39	" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
236	greg	1.15	quit(1);
237	schorsch	2.32	return 1; /* pro forma return */
238	greg	1.15	}
239
240
241	schorsch	2.30	static int
242	greg	2.39	headline( /* check header line & echo if requested */
243	schorsch	2.30	char *s,
244			void *p
245			)
246	greg	1.15	{
247			char fmt[32];
248			double d;
249			COLOR ctmp;
250
251	greg	2.14	if (isheadid(s)) /* header id */
252	gwlarson	2.21	return(0); /* don't echo */
253	greg	2.14	if (formatval(fmt, s)) { /* check format */
254	greg	2.16	if (globmatch(ourfmt, fmt)) {
255			wrongformat = 0;
256			strcpy(ourfmt, fmt);
257			} else
258	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
259	gwlarson	2.21	return(0); /* don't echo */
260	greg	1.17	}
261			if (isexpos(s)) { /* exposure */
262			d = exposval(s);
263			scalecolor(input[nfiles].expos, d);
264			} else if (iscolcor(s)) { /* color correction */
265	greg	1.15	colcorval(ctmp, s);
266	greg	1.17	multcolor(input[nfiles].expos, ctmp);
267	greg	2.18	} else if (isaspect(s))
268	greg	2.17	input[nfiles].pa *= aspectval(s);
269	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
270	greg	2.10	gotview++;
271	greg	2.39
272			if (echoheader) { /* echo line */
273			putchar('\t');
274			return(fputs(s, stdout));
275			}
276			return(0);
277	greg	1.16	}
278	greg	1.15
279	greg	1.16
280	schorsch	2.32	static void
281			checkfile(void) /* ready a file */
282	greg	1.16	{
283			register int i;
284			/* process header */
285	greg	2.10	gotview = 0;
286	greg	2.39	if (echoheader) {
287			fputs(input[nfiles].name, stdout);
288			fputs(":\n", stdout);
289			}
290			getheader(input[nfiles].fp, headline, NULL);
291	greg	2.22	if (wrongformat < 0) {
292	greg	1.16	eputs(input[nfiles].name);
293	greg	2.22	eputs(": not a Radiance picture\n");
294	greg	1.16	quit(1);
295			}
296	greg	2.22	if (wrongformat > 0) {
297			wputs(input[nfiles].name);
298			wputs(": warning -- incompatible picture format\n");
299			}
300	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
301			input[nfiles].vw.type = 0;
302			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
303	greg	1.16	eputs(input[nfiles].name);
304			eputs(": bad picture size\n");
305			quit(1);
306			}
307	greg	1.18	if (xmax == 0 && ymax == 0) {
308	greg	2.10	xmax = scanlen(&input[nfiles].rs);
309			ymax = numscans(&input[nfiles].rs);
310			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
311			numscans(&input[nfiles].rs) != ymax) {
312	greg	1.16	eputs(input[nfiles].name);
313			eputs(": resolution mismatch\n");
314			quit(1);
315			}
316			/* allocate scanlines */
317			for (i = 0; i < WINSIZ; i++)
318	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
319	greg	1.15	}
320
321
322	schorsch	2.32	static double
323			rgb_bright(
324			COLOR clr
325			)
326	greg	2.16	{
327			return(bright(clr));
328			}
329
330
331	schorsch	2.32	static double
332			xyz_bright(
333			COLOR clr
334			)
335	greg	2.16	{
336			return(clr[CIEY]);
337			}
338
339
340			double (*ourbright)() = rgb_bright;
341
342
343	schorsch	2.32	static void
344			init(void) /* perform final setup */
345	greg	1.15	{
346	greg	1.16	register int i;
347	greg	1.15	/* define constants */
348	greg	2.19	varset("PI", ':', PI);
349	greg	1.15	varset(vnfiles, ':', (double)nfiles);
350	greg	1.18	varset(vxmax, ':', (double)xmax);
351			varset(vymax, ':', (double)ymax);
352	greg	1.15	/* set functions */
353			for (i = 0; i < 3; i++) {
354	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
355	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
356			}
357	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
358	greg	1.15	funset(vbrtin, 1, '=', l_colin);
359	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
360			for (i = 0; i < 7; i++)
361	greg	2.10	funset(vray[i], 1, '=', l_ray);
362	greg	2.17	funset(vpsize, 1, '=', l_psize);
363	greg	2.16	/* set brightness function */
364	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
365			varset(vwhteff, ':', 1.0);
366	greg	2.16	ourbright = xyz_bright;
367	greg	2.18	} else
368			varset(vwhteff, ':', WHTEFFICACY);
369	greg	1.1	}
370
371
372	schorsch	2.32	static void
373			combine(void) /* combine pictures */
374	greg	1.1	{
375	greg	1.8	EPNODE coldef[3], brtdef;
376	greg	1.1	COLOR *scanout;
377	greg	1.8	double d;
378	greg	1.1	register int i, j;
379			/* check defined variables */
380	greg	1.4	for (j = 0; j < 3; j++) {
381			if (vardefined(vcolout[j]))
382			coldef[j] = eparse(vcolout[j]);
383			else
384			coldef[j] = NULL;
385			}
386	greg	1.8	if (vardefined(vbrtout))
387			brtdef = eparse(vbrtout);
388			else
389			brtdef = NULL;
390	greg	1.1	/* allocate scanline */
391			scanout = (COLOR )emalloc(xressizeof(COLOR));
392	greg	1.18	/* set input position */
393			yscan = ymax+MIDSCN;
394	greg	1.1	/* combine files */
395			for (ypos = yres-1; ypos >= 0; ypos--) {
396	greg	1.14	advance();
397	greg	1.11	varset(vypos, '=', (double)ypos);
398	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
399	greg	1.18	xscan = (long)xpos*xmax/xres;
400	greg	1.11	varset(vxpos, '=', (double)xpos);
401	greg	1.8	eclock++;
402			if (brtdef != NULL) {
403			d = evalue(brtdef);
404			if (d < 0.0)
405			d = 0.0;
406			setcolor(scanout[xpos], d, d, d);
407			} else {
408			for (j = 0; j < 3; j++) {
409			if (coldef[j] != NULL) {
410	greg	1.13	d = evalue(coldef[j]);
411	greg	1.8	} else {
412	greg	1.13	d = 0.0;
413	greg	1.8	for (i = 0; i < nfiles; i++)
414	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
415	greg	1.1	}
416	greg	1.13	if (d < 0.0)
417			d = 0.0;
418			colval(scanout[xpos],j) = d;
419	greg	1.8	}
420	greg	1.1	}
421	greg	1.8	}
422			if (fwritescan(scanout, xres, stdout) < 0) {
423			perror("write error");
424			quit(1);
425			}
426	greg	1.1	}
427	greg	2.22	efree((char *)scanout);
428	greg	1.1	}
429
430
431	schorsch	2.32	static void
432			advance(void) /* read in data for next scanline */
433	greg	1.14	{
434	greg	1.18	int ytarget;
435	greg	1.14	register COLOR *st;
436			register int i, j;
437
438	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
439			for (i = 0; i < nfiles; i++) {
440			st = input[i].scan[WINSIZ-1];
441			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
442			input[i].scan[j] = input[i].scan[j-1];
443			input[i].scan[0] = st;
444			if (yscan <= MIDSCN) /* hit bottom? */
445			continue;
446	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
447	greg	1.18	eputs(input[i].name);
448			eputs(": read error\n");
449			quit(1);
450			}
451	greg	2.37	for (j = 0; j < xmax; j++) /* adjust color */
452			multcolor(st[j], input[i].coef);
453	greg	1.14	}
454			}
455
456
457	schorsch	2.32	static double
458			l_expos( /* return picture exposure */
459			register char *nam
460			)
461	greg	1.1	{
462	greg	1.15	register int fn, n;
463	greg	1.14
464	greg	1.18	fn = argument(1) - .5;
465			if (fn < 0 \|\| fn >= nfiles)
466			return(1.0);
467	greg	1.17	if (nam == vbrtexp)
468	greg	2.16	return((*ourbright)(input[fn].expos));
469	greg	1.15	n = 3;
470			while (n--)
471	greg	1.17	if (nam == vcolexp[n])
472			return(colval(input[fn].expos,n));
473			eputs("Bad call to l_expos()!\n");
474	greg	1.15	quit(1);
475	schorsch	2.32	return 1; /* pro forma return */
476	greg	1.15	}
477
478
479	schorsch	2.32	static double
480	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
481	greg	2.18	{
482			register int fn;
483
484			fn = argument(1) - .5;
485			if (fn < 0 \|\| fn >= nfiles)
486			return(1.0);
487			return(input[fn].pa);
488			}
489
490
491	schorsch	2.32	static double
492			l_colin( /* return color value for picture */
493			register char *nam
494			)
495	greg	1.15	{
496			int fn;
497			register int n, xoff, yoff;
498			double d;
499
500	greg	2.18	fn = argument(1) - .5;
501	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
502	greg	1.15	errno = EDOM;
503			return(0.0);
504			}
505	greg	1.14	xoff = yoff = 0;
506			n = nargum();
507			if (n >= 2) {
508			d = argument(2);
509			if (d < 0.0) {
510			xoff = d-.5;
511	greg	1.18	if (xscan+xoff < 0)
512			xoff = -xscan;
513	greg	1.14	} else {
514			xoff = d+.5;
515	greg	1.18	if (xscan+xoff >= xmax)
516			xoff = xmax-1-xscan;
517	greg	1.14	}
518			}
519			if (n >= 3) {
520			d = argument(3);
521			if (d < 0.0) {
522			yoff = d-.5;
523			if (yoff+MIDSCN < 0)
524			yoff = -MIDSCN;
525	greg	1.18	if (yscan+yoff < 0)
526			yoff = -yscan;
527	greg	1.14	} else {
528			yoff = d+.5;
529			if (yoff+MIDSCN >= WINSIZ)
530			yoff = WINSIZ-1-MIDSCN;
531	greg	1.18	if (yscan+yoff >= ymax)
532			yoff = ymax-1-yscan;
533	greg	1.14	}
534			}
535	greg	1.15	if (nam == vbrtin)
536	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
537	greg	1.15	n = 3;
538			while (n--)
539			if (nam == vcolin[n])
540	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
541	greg	1.15	eputs("Bad call to l_colin()!\n");
542	greg	2.10	quit(1);
543	schorsch	2.32	return 1; /* pro forma return */
544	greg	2.10	}
545
546
547	schorsch	2.32	static double
548			l_ray( /* return ray origin or direction */
549			register char *nam
550			)
551	greg	2.10	{
552	greg	2.15	static unsigned long ltick[MAXINP];
553	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
554	greg	2.18	static double ldist[MAXINP];
555	schorsch	2.25	RREAL loc[2];
556	greg	2.10	int fn;
557			register int i;
558
559	greg	2.18	fn = argument(1) - .5;
560	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
561			errno = EDOM;
562			return(0.0);
563			}
564	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
565	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
566			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
567	greg	2.20	ldist[fn] = -1.0;
568	greg	2.10	if (input[fn].vw.type == 0)
569	greg	2.12	errno = EDOM;
570	greg	2.10	else {
571	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
572	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
573			&input[fn].vw, loc[0], loc[1]);
574	greg	2.10	}
575	greg	2.18	ltick[fn] = eclock;
576	greg	2.10	}
577	greg	2.18	if (nam == vray[i=6])
578			return(ldist[fn]);
579	greg	2.10	while (i--)
580			if (nam == vray[i])
581			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
582			eputs("Bad call to l_ray()!\n");
583	greg	1.15	quit(1);
584	schorsch	2.32	return 1; /* pro forma return */
585	greg	2.17	}
586
587
588	schorsch	2.32	static double
589	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
590	greg	2.17	{
591			static unsigned long ltick[MAXINP];
592			static double psize[MAXINP];
593	greg	2.18	FVECT dir0, org, dirx, diry;
594	schorsch	2.25	RREAL locx[2], locy[2];
595	greg	2.17	double d;
596			int fn;
597	greg	2.18	register int i;
598	greg	2.17
599			d = argument(1);
600	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
601	greg	2.17	errno = EDOM;
602			return(0.0);
603			}
604	greg	2.18	fn = d - .5;
605	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
606	greg	2.18	psize[fn] = 0.0;
607			if (input[fn].vw.type == 0)
608	greg	2.17	errno = EDOM;
609	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
610	greg	2.36	funvalue(vray[6], 1, &d) >= -FTINY) {
611	greg	2.18	for (i = 0; i < 3; i++)
612			dir0[i] = funvalue(vray[3+i], 1, &d);
613			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
614			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
615			if (viewray(org, dirx, &input[fn].vw,
616	greg	2.35	locx[0], locx[1]) >= -FTINY &&
617	greg	2.18	viewray(org, diry, &input[fn].vw,
618	greg	2.35	locy[0], locy[1]) >= -FTINY) {
619	greg	2.17	/* approximate solid angle */
620	greg	2.18	for (i = 0; i < 3; i++) {
621			dirx[i] -= dir0[i];
622			diry[i] -= dir0[i];
623			}
624			fcross(dir0, dirx, diry);
625	greg	2.35	psize[fn] = VLEN(dir0);
626	greg	2.17	}
627			}
628	greg	2.18	ltick[fn] = eclock;
629			}
630	greg	2.17	return(psize[fn]);
631	greg	1.1	}
632
633
634	schorsch	2.29	extern void
635			wputs(char *msg)
636	greg	1.1	{
637			if (!nowarn)
638			eputs(msg);
639			}
640
641
642	schorsch	2.29	extern void
643			eputs(char *msg)
644	greg	1.1	{
645			fputs(msg, stderr);
646			}
647
648
649	schorsch	2.29	extern void
650			quit(int code) /* exit gracefully */
651	greg	2.4	{
652	greg	2.5	register int i;
653			/* close input files */
654			for (i = 0; i < nfiles; i++)
655	greg	2.6	if (input[i].name == Command)
656			pclose(input[i].fp);
657			else
658			fclose(input[i].fp);
659	greg	1.1	exit(code);
660			}