src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.32 2004/03/28 20:33:14 schorsch 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          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:	2.33
Committed:	Tue Jun 8 19:48:30 2004 UTC (21 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.32:	+2 -3 lines
Log Message:	Removed redundant #include's and fixed ordering on some headers
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.33	static const char RCSid[] = "$Id: pcomb.c,v 2.32 2004/03/28 20:33:14 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	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	1.6	#define MAXINP 32 /* maximum number of input files */
18	greg	2.22	#define WINSIZ 64 /* scanline window size */
19	greg	2.13	#define MIDSCN ((WINSIZ-1)/2+1)
20	greg	1.1
21			struct {
22	greg	1.19	char name; / file or command name */
23	greg	1.1	FILE fp; / stream pointer */
24	greg	2.10	VIEW vw; /* view for picture */
25			RESOLU rs; /* image resolution and orientation */
26	greg	2.17	float pa; /* pixel aspect ratio */
27	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
28	greg	1.3	COLOR coef; /* coefficient */
29	greg	1.17	COLOR expos; /* recorded exposure */
30	greg	1.1	} input[MAXINP]; /* input pictures */
31
32			int nfiles; /* number of input files */
33
34	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
35
36	greg	2.31	char StandardInput[] = "<stdin>";
37	greg	2.6	char Command[] = "<Command>";
38	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
39			char vcolout[3][4] = {"ro", "go", "bo"};
40	greg	1.15	char vbrtin[] = "li";
41			char vbrtout[] = "lo";
42	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
43	greg	1.17	char vbrtexp[] = "le";
44	greg	2.18	char vpixaspect[] = "pa";
45	greg	1.1
46	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
47	greg	2.10
48	greg	2.17	char vpsize[] = "S";
49
50	greg	1.18	char vnfiles[] = "nfiles";
51	greg	2.18	char vwhteff[] = "WE";
52	greg	1.18	char vxmax[] = "xmax";
53			char vymax[] = "ymax";
54			char vxres[] = "xres";
55			char vyres[] = "yres";
56			char vxpos[] = "x";
57			char vypos[] = "y";
58	greg	1.1
59			int nowarn = 0; /* no warning messages? */
60
61	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
62	greg	1.9
63	greg	1.18	int xscan, yscan; /* input position */
64	greg	1.1
65	greg	1.18	int xres, yres; /* output resolution */
66	greg	1.1
67	greg	1.18	int xpos, ypos; /* output position */
68
69	greg	2.10	char progname; / global argv[0] */
70
71	greg	1.10	int wrongformat = 0;
72	greg	2.10	int gotview;
73	greg	1.1
74	greg	1.10
75	schorsch	2.30	static gethfunc tabputs;
76	schorsch	2.32	static void checkfile(void);
77			static double rgb_bright(COLOR clr);
78			static double xyz_bright(COLOR clr);
79			static void init(void);
80			static void combine(void);
81			static void advance(void);
82			static double l_expos(char *nam);
83			static double l_pixaspect(char *nm);
84			static double l_colin(char *nam);
85			static double l_ray(char *nam);
86			static double l_psize(char *nm);
87
88
89			int
90			main(
91			int argc,
92			char *argv[]
93			)
94	greg	1.1	{
95	greg	1.18	int original;
96	greg	1.3	double f;
97	schorsch	2.32	int a;
98	schorsch	2.23	SET_DEFAULT_BINARY();
99			SET_FILE_BINARY(stdin);
100			SET_FILE_BINARY(stdout);
101	greg	2.10	progname = argv[0];
102	greg	1.15	/* scan options */
103			for (a = 1; a < argc; a++) {
104	greg	1.1	if (argv[a][0] == '-')
105			switch (argv[a][1]) {
106			case 'x':
107			case 'y':
108	greg	1.18	a++;
109	greg	1.15	continue;
110	greg	1.1	case 'w':
111			nowarn = !nowarn;
112	greg	1.15	continue;
113	greg	1.1	case 'f':
114			case 'e':
115	greg	1.16	a++;
116	greg	1.15	continue;
117	greg	1.1	}
118	greg	1.15	break;
119			}
120	greg	2.14	newheader("RADIANCE", stdout); /* start header */
121	greg	2.22	fputnow(stdout);
122	greg	1.15	/* process files */
123	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
124	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
125	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
126	schorsch	2.26	input[nfiles].vw = stdview;
127	greg	2.17	input[nfiles].pa = 1.0;
128	greg	1.17	}
129	greg	1.1	nfiles = 0;
130	greg	1.18	original = 0;
131	greg	1.1	for ( ; a < argc; a++) {
132			if (nfiles >= MAXINP) {
133			eputs(argv[0]);
134			eputs(": too many picture files\n");
135			quit(1);
136			}
137	greg	1.3	if (argv[a][0] == '-')
138			switch (argv[a][1]) {
139			case '\0':
140	greg	2.31	input[nfiles].name = StandardInput;
141	greg	1.3	input[nfiles].fp = stdin;
142			break;
143	greg	1.17	case 'o':
144			original++;
145	greg	1.22	continue;
146	greg	1.3	case 's':
147			f = atof(argv[++a]);
148			scalecolor(input[nfiles].coef, f);
149			continue;
150			case 'c':
151			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
152			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
153			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
154			continue;
155			default:
156			goto usage;
157			}
158			else {
159	greg	2.2	if (argv[a][0] == '!') {
160	greg	2.6	input[nfiles].name = Command;
161	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
162			} else {
163			input[nfiles].name = argv[a];
164			input[nfiles].fp = fopen(argv[a], "r");
165			}
166	greg	1.1	if (input[nfiles].fp == NULL) {
167	greg	1.6	perror(argv[a]);
168	greg	1.1	quit(1);
169			}
170			}
171	greg	1.16	checkfile();
172	greg	1.18	if (original) {
173			colval(input[nfiles].coef,RED) /=
174			colval(input[nfiles].expos,RED);
175			colval(input[nfiles].coef,GRN) /=
176			colval(input[nfiles].expos,GRN);
177			colval(input[nfiles].coef,BLU) /=
178			colval(input[nfiles].expos,BLU);
179	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
180	greg	1.18	}
181			nfiles++;
182	greg	1.17	original = 0;
183	greg	1.15	}
184	greg	1.18	init(); /* set constants */
185	greg	1.15	/* go back and get expressions */
186			for (a = 1; a < argc; a++) {
187			if (argv[a][0] == '-')
188			switch (argv[a][1]) {
189			case 'x':
190	greg	1.21	varset(vxres, ':', eval(argv[++a]));
191	greg	1.18	continue;
192	greg	1.15	case 'y':
193	greg	1.21	varset(vyres, ':', eval(argv[++a]));
194	greg	1.16	continue;
195	greg	1.15	case 'w':
196			continue;
197			case 'f':
198			fcompile(argv[++a]);
199			continue;
200			case 'e':
201			scompile(argv[++a], NULL, 0);
202			continue;
203			}
204			break;
205			}
206	greg	1.18	/* set/get output resolution */
207			if (!vardefined(vxres))
208			varset(vxres, ':', (double)xmax);
209			if (!vardefined(vyres))
210			varset(vyres, ':', (double)ymax);
211			xres = varvalue(vxres) + .5;
212			yres = varvalue(vyres) + .5;
213			if (xres <= 0 \|\| yres <= 0) {
214			eputs(argv[0]);
215			eputs(": illegal output resolution\n");
216			quit(1);
217			}
218	greg	1.15	/* complete header */
219			printargs(argc, argv, stdout);
220	greg	2.16	if (strcmp(ourfmt, PICFMT))
221			fputformat(ourfmt, stdout); /* print format if known */
222	greg	1.15	putchar('\n');
223	greg	1.23	fprtresolu(xres, yres, stdout);
224	greg	1.15	/* combine pictures */
225			combine();
226			quit(0);
227			usage:
228			eputs("Usage: ");
229			eputs(argv[0]);
230			eputs(
231	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
232	greg	1.15	quit(1);
233	schorsch	2.32	return 1; /* pro forma return */
234	greg	1.15	}
235
236
237	schorsch	2.30	static int
238			tabputs( /* put out string preceded by a tab */
239			char *s,
240			void *p
241			)
242	greg	1.15	{
243			char fmt[32];
244			double d;
245			COLOR ctmp;
246
247	greg	2.14	if (isheadid(s)) /* header id */
248	gwlarson	2.21	return(0); /* don't echo */
249	greg	2.14	if (formatval(fmt, s)) { /* check format */
250	greg	2.16	if (globmatch(ourfmt, fmt)) {
251			wrongformat = 0;
252			strcpy(ourfmt, fmt);
253			} else
254	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
255	gwlarson	2.21	return(0); /* don't echo */
256	greg	1.17	}
257			if (isexpos(s)) { /* exposure */
258			d = exposval(s);
259			scalecolor(input[nfiles].expos, d);
260			} else if (iscolcor(s)) { /* color correction */
261	greg	1.15	colcorval(ctmp, s);
262	greg	1.17	multcolor(input[nfiles].expos, ctmp);
263	greg	2.18	} else if (isaspect(s))
264	greg	2.17	input[nfiles].pa *= aspectval(s);
265	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
266	greg	2.10	gotview++;
267	greg	1.17	/* echo line */
268			putchar('\t');
269	gwlarson	2.21	return(fputs(s, stdout));
270	greg	1.16	}
271	greg	1.15
272	greg	1.16
273	schorsch	2.32	static void
274			checkfile(void) /* ready a file */
275	greg	1.16	{
276			register int i;
277			/* process header */
278	greg	2.10	gotview = 0;
279	greg	1.16	fputs(input[nfiles].name, stdout);
280			fputs(":\n", stdout);
281	greg	2.22	getheader(input[nfiles].fp, tabputs, NULL);
282			if (wrongformat < 0) {
283	greg	1.16	eputs(input[nfiles].name);
284	greg	2.22	eputs(": not a Radiance picture\n");
285	greg	1.16	quit(1);
286			}
287	greg	2.22	if (wrongformat > 0) {
288			wputs(input[nfiles].name);
289			wputs(": warning -- incompatible picture format\n");
290			}
291	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
292			input[nfiles].vw.type = 0;
293			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
294	greg	1.16	eputs(input[nfiles].name);
295			eputs(": bad picture size\n");
296			quit(1);
297			}
298	greg	1.18	if (xmax == 0 && ymax == 0) {
299	greg	2.10	xmax = scanlen(&input[nfiles].rs);
300			ymax = numscans(&input[nfiles].rs);
301			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
302			numscans(&input[nfiles].rs) != ymax) {
303	greg	1.16	eputs(input[nfiles].name);
304			eputs(": resolution mismatch\n");
305			quit(1);
306			}
307			/* allocate scanlines */
308			for (i = 0; i < WINSIZ; i++)
309	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
310	greg	1.15	}
311
312
313	schorsch	2.32	static double
314			rgb_bright(
315			COLOR clr
316			)
317	greg	2.16	{
318			return(bright(clr));
319			}
320
321
322	schorsch	2.32	static double
323			xyz_bright(
324			COLOR clr
325			)
326	greg	2.16	{
327			return(clr[CIEY]);
328			}
329
330
331			double (*ourbright)() = rgb_bright;
332
333
334	schorsch	2.32	static void
335			init(void) /* perform final setup */
336	greg	1.15	{
337	greg	2.27	double l_colin(char ), l_expos(char ), l_pixaspect(char *),
338			l_ray(char ), l_psize(char );
339	greg	1.16	register int i;
340	greg	1.15	/* define constants */
341	greg	2.19	varset("PI", ':', PI);
342	greg	1.15	varset(vnfiles, ':', (double)nfiles);
343	greg	1.18	varset(vxmax, ':', (double)xmax);
344			varset(vymax, ':', (double)ymax);
345	greg	1.15	/* set functions */
346			for (i = 0; i < 3; i++) {
347	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
348	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
349			}
350	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
351	greg	1.15	funset(vbrtin, 1, '=', l_colin);
352	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
353			for (i = 0; i < 7; i++)
354	greg	2.10	funset(vray[i], 1, '=', l_ray);
355	greg	2.17	funset(vpsize, 1, '=', l_psize);
356	greg	2.16	/* set brightness function */
357	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
358			varset(vwhteff, ':', 1.0);
359	greg	2.16	ourbright = xyz_bright;
360	greg	2.18	} else
361			varset(vwhteff, ':', WHTEFFICACY);
362	greg	1.1	}
363
364
365	schorsch	2.32	static void
366			combine(void) /* combine pictures */
367	greg	1.1	{
368	greg	1.8	EPNODE coldef[3], brtdef;
369	greg	1.1	COLOR *scanout;
370	greg	1.8	double d;
371	greg	1.1	register int i, j;
372			/* check defined variables */
373	greg	1.4	for (j = 0; j < 3; j++) {
374			if (vardefined(vcolout[j]))
375			coldef[j] = eparse(vcolout[j]);
376			else
377			coldef[j] = NULL;
378			}
379	greg	1.8	if (vardefined(vbrtout))
380			brtdef = eparse(vbrtout);
381			else
382			brtdef = NULL;
383	greg	1.1	/* allocate scanline */
384			scanout = (COLOR )emalloc(xressizeof(COLOR));
385	greg	1.18	/* set input position */
386			yscan = ymax+MIDSCN;
387	greg	1.1	/* combine files */
388			for (ypos = yres-1; ypos >= 0; ypos--) {
389	greg	1.14	advance();
390	greg	1.11	varset(vypos, '=', (double)ypos);
391	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
392	greg	1.18	xscan = (long)xpos*xmax/xres;
393	greg	1.11	varset(vxpos, '=', (double)xpos);
394	greg	1.8	eclock++;
395			if (brtdef != NULL) {
396			d = evalue(brtdef);
397			if (d < 0.0)
398			d = 0.0;
399			setcolor(scanout[xpos], d, d, d);
400			} else {
401			for (j = 0; j < 3; j++) {
402			if (coldef[j] != NULL) {
403	greg	1.13	d = evalue(coldef[j]);
404	greg	1.8	} else {
405	greg	1.13	d = 0.0;
406	greg	1.8	for (i = 0; i < nfiles; i++)
407	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
408	greg	1.1	}
409	greg	1.13	if (d < 0.0)
410			d = 0.0;
411			colval(scanout[xpos],j) = d;
412	greg	1.8	}
413	greg	1.1	}
414	greg	1.8	}
415			if (fwritescan(scanout, xres, stdout) < 0) {
416			perror("write error");
417			quit(1);
418			}
419	greg	1.1	}
420	greg	2.22	efree((char *)scanout);
421	greg	1.1	}
422
423
424	schorsch	2.32	static void
425			advance(void) /* read in data for next scanline */
426	greg	1.14	{
427	greg	1.18	int ytarget;
428	greg	1.14	register COLOR *st;
429			register int i, j;
430
431	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
432			for (i = 0; i < nfiles; i++) {
433			st = input[i].scan[WINSIZ-1];
434			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
435			input[i].scan[j] = input[i].scan[j-1];
436			input[i].scan[0] = st;
437			if (yscan <= MIDSCN) /* hit bottom? */
438			continue;
439	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
440	greg	1.18	eputs(input[i].name);
441			eputs(": read error\n");
442			quit(1);
443			}
444	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
445			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
446			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
447			for (j = 0; j < xmax; j++) /* adjust color */
448			multcolor(st[j], input[i].coef);
449	greg	1.14	}
450			}
451
452
453	schorsch	2.32	static double
454			l_expos( /* return picture exposure */
455			register char *nam
456			)
457	greg	1.1	{
458	greg	1.15	register int fn, n;
459	greg	1.14
460	greg	1.18	fn = argument(1) - .5;
461			if (fn < 0 \|\| fn >= nfiles)
462			return(1.0);
463	greg	1.17	if (nam == vbrtexp)
464	greg	2.16	return((*ourbright)(input[fn].expos));
465	greg	1.15	n = 3;
466			while (n--)
467	greg	1.17	if (nam == vcolexp[n])
468			return(colval(input[fn].expos,n));
469			eputs("Bad call to l_expos()!\n");
470	greg	1.15	quit(1);
471	schorsch	2.32	return 1; /* pro forma return */
472	greg	1.15	}
473
474
475	schorsch	2.32	static double
476	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
477	greg	2.18	{
478			register int fn;
479
480			fn = argument(1) - .5;
481			if (fn < 0 \|\| fn >= nfiles)
482			return(1.0);
483			return(input[fn].pa);
484			}
485
486
487	schorsch	2.32	static double
488			l_colin( /* return color value for picture */
489			register char *nam
490			)
491	greg	1.15	{
492			int fn;
493			register int n, xoff, yoff;
494			double d;
495
496	greg	2.18	fn = argument(1) - .5;
497	greg	1.16	if (fn < 0 \|\| fn >= nfiles) {
498	greg	1.15	errno = EDOM;
499			return(0.0);
500			}
501	greg	1.14	xoff = yoff = 0;
502			n = nargum();
503			if (n >= 2) {
504			d = argument(2);
505			if (d < 0.0) {
506			xoff = d-.5;
507	greg	1.18	if (xscan+xoff < 0)
508			xoff = -xscan;
509	greg	1.14	} else {
510			xoff = d+.5;
511	greg	1.18	if (xscan+xoff >= xmax)
512			xoff = xmax-1-xscan;
513	greg	1.14	}
514			}
515			if (n >= 3) {
516			d = argument(3);
517			if (d < 0.0) {
518			yoff = d-.5;
519			if (yoff+MIDSCN < 0)
520			yoff = -MIDSCN;
521	greg	1.18	if (yscan+yoff < 0)
522			yoff = -yscan;
523	greg	1.14	} else {
524			yoff = d+.5;
525			if (yoff+MIDSCN >= WINSIZ)
526			yoff = WINSIZ-1-MIDSCN;
527	greg	1.18	if (yscan+yoff >= ymax)
528			yoff = ymax-1-yscan;
529	greg	1.14	}
530			}
531	greg	1.15	if (nam == vbrtin)
532	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
533	greg	1.15	n = 3;
534			while (n--)
535			if (nam == vcolin[n])
536	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
537	greg	1.15	eputs("Bad call to l_colin()!\n");
538	greg	2.10	quit(1);
539	schorsch	2.32	return 1; /* pro forma return */
540	greg	2.10	}
541
542
543	schorsch	2.32	static double
544			l_ray( /* return ray origin or direction */
545			register char *nam
546			)
547	greg	2.10	{
548	greg	2.15	static unsigned long ltick[MAXINP];
549	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
550	greg	2.18	static double ldist[MAXINP];
551	schorsch	2.25	RREAL loc[2];
552	greg	2.10	int fn;
553			register int i;
554
555	greg	2.18	fn = argument(1) - .5;
556	greg	2.10	if (fn < 0 \|\| fn >= nfiles) {
557			errno = EDOM;
558			return(0.0);
559			}
560	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
561	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
562			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
563	greg	2.20	ldist[fn] = -1.0;
564	greg	2.10	if (input[fn].vw.type == 0)
565	greg	2.12	errno = EDOM;
566	greg	2.10	else {
567	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
568	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
569			&input[fn].vw, loc[0], loc[1]);
570	greg	2.10	}
571	greg	2.18	ltick[fn] = eclock;
572	greg	2.10	}
573	greg	2.18	if (nam == vray[i=6])
574			return(ldist[fn]);
575	greg	2.10	while (i--)
576			if (nam == vray[i])
577			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
578			eputs("Bad call to l_ray()!\n");
579	greg	1.15	quit(1);
580	schorsch	2.32	return 1; /* pro forma return */
581	greg	2.17	}
582
583
584	schorsch	2.32	static double
585	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
586	greg	2.17	{
587			static unsigned long ltick[MAXINP];
588			static double psize[MAXINP];
589	greg	2.18	FVECT dir0, org, dirx, diry;
590	schorsch	2.25	RREAL locx[2], locy[2];
591	greg	2.17	double d;
592			int fn;
593	greg	2.18	register int i;
594	greg	2.17
595			d = argument(1);
596	greg	2.18	if (d < .5 \|\| d >= nfiles+.5) {
597	greg	2.17	errno = EDOM;
598			return(0.0);
599			}
600	greg	2.18	fn = d - .5;
601	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
602	greg	2.18	psize[fn] = 0.0;
603			if (input[fn].vw.type == 0)
604	greg	2.17	errno = EDOM;
605	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
606			funvalue(vray[6], 1, &d) >= 0) {
607			for (i = 0; i < 3; i++)
608			dir0[i] = funvalue(vray[3+i], 1, &d);
609			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
610			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
611			if (viewray(org, dirx, &input[fn].vw,
612			locx[0], locx[1]) >= 0 &&
613			viewray(org, diry, &input[fn].vw,
614			locy[0], locy[1]) >= 0) {
615	greg	2.17	/* approximate solid angle */
616	greg	2.18	for (i = 0; i < 3; i++) {
617			dirx[i] -= dir0[i];
618			diry[i] -= dir0[i];
619			}
620			fcross(dir0, dirx, diry);
621	greg	2.22	psize[fn] = sqrt(DOT(dir0,dir0));
622	greg	2.17	}
623			}
624	greg	2.18	ltick[fn] = eclock;
625			}
626	greg	2.17	return(psize[fn]);
627	greg	1.1	}
628
629
630	schorsch	2.29	extern void
631			wputs(char *msg)
632	greg	1.1	{
633			if (!nowarn)
634			eputs(msg);
635			}
636
637
638	schorsch	2.29	extern void
639			eputs(char *msg)
640	greg	1.1	{
641			fputs(msg, stderr);
642			}
643
644
645	schorsch	2.29	extern void
646			quit(int code) /* exit gracefully */
647	greg	2.4	{
648	greg	2.5	register int i;
649			/* close input files */
650			for (i = 0; i < nfiles; i++)
651	greg	2.6	if (input[i].name == Command)
652			pclose(input[i].fp);
653			else
654			fclose(input[i].fp);
655	greg	1.1	exit(code);
656			}