src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.43 2008/11/10 19:08:19 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          1024            /* 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 'h':
                                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] hdr ..]\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 = (xpos+.5)*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 = (ypos+.5)*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 */
        char    *nam
)
{
        int     fn, n;
        double  d;

        d = argument(1);
        if (d <= -0.5 || d >= nfiles+0.5) {
                errno = EDOM;
                return(0.0);
        }
        if (d < 0.5)
                return((double)nfiles);
        fn = d - 0.5;
        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 */
{
        int     fn;
        double  d;

        d = argument(1);
        if (d <= -0.5 || d >= nfiles+0.5) {
                errno = EDOM;
                return(0.0);
        }
        if (d < 0.5)
                return((double)nfiles);
        fn = d - 0.5;
        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;

        d = argument(1);
        if (d <= -0.5 || d >= nfiles+0.5) {
                errno = EDOM;
                return(0.0);
        }
        if (d < 0.5)
                return((double)nfiles);
        fn = d - 0.5;
        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];
        double  d;
        int     fn;
        register int    i;

        d = argument(1);
        if (d <= -0.5 || d >= nfiles+0.5) {
                errno = EDOM;
                return(0.0);
        }
        if (d < 0.5)
                return((double)nfiles);
        fn = d - 0.5;
        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 <= -0.5 || d >= nfiles+0.5) {
                errno = EDOM;
                return(0.0);
        }
        if (d < 0.5)
                return((double)nfiles);
        fn = d - 0.5;
        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:	2.44
Committed:	Mon Aug 10 04:26:38 2009 UTC (14 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2P2, rad5R0, rad4R2, rad4R1, rad4R0, rad4R2P1
Changes since 2.43:	+2 -2 lines
Log Message:	Upped limit on open files to 1024
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.44	static const char RCSid[] = "$Id: pcomb.c,v 2.43 2008/11/10 19:08:19 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	2.44	#define MAXINP 1024 /* 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	greg	2.40	case 'h':
202			continue;
203	greg	1.15	case 'f':
204			fcompile(argv[++a]);
205			continue;
206			case 'e':
207			scompile(argv[++a], NULL, 0);
208			continue;
209			}
210			break;
211			}
212	greg	1.18	/* set/get output resolution */
213			if (!vardefined(vxres))
214			varset(vxres, ':', (double)xmax);
215			if (!vardefined(vyres))
216			varset(vyres, ':', (double)ymax);
217			xres = varvalue(vxres) + .5;
218			yres = varvalue(vyres) + .5;
219			if (xres <= 0 \|\| yres <= 0) {
220			eputs(argv[0]);
221			eputs(": illegal output resolution\n");
222			quit(1);
223			}
224	greg	1.15	/* complete header */
225			printargs(argc, argv, stdout);
226	greg	2.16	if (strcmp(ourfmt, PICFMT))
227			fputformat(ourfmt, stdout); /* print format if known */
228	greg	1.15	putchar('\n');
229	greg	1.23	fprtresolu(xres, yres, stdout);
230	greg	1.15	/* combine pictures */
231			combine();
232			quit(0);
233			usage:
234			eputs("Usage: ");
235			eputs(argv[0]);
236			eputs(
237	greg	2.43	" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] hdr ..]\n");
238	greg	1.15	quit(1);
239	schorsch	2.32	return 1; /* pro forma return */
240	greg	1.15	}
241
242
243	schorsch	2.30	static int
244	greg	2.39	headline( /* check header line & echo if requested */
245	schorsch	2.30	char *s,
246			void *p
247			)
248	greg	1.15	{
249			char fmt[32];
250			double d;
251			COLOR ctmp;
252
253	greg	2.14	if (isheadid(s)) /* header id */
254	gwlarson	2.21	return(0); /* don't echo */
255	greg	2.14	if (formatval(fmt, s)) { /* check format */
256	greg	2.16	if (globmatch(ourfmt, fmt)) {
257			wrongformat = 0;
258			strcpy(ourfmt, fmt);
259			} else
260	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
261	gwlarson	2.21	return(0); /* don't echo */
262	greg	1.17	}
263			if (isexpos(s)) { /* exposure */
264			d = exposval(s);
265			scalecolor(input[nfiles].expos, d);
266			} else if (iscolcor(s)) { /* color correction */
267	greg	1.15	colcorval(ctmp, s);
268	greg	1.17	multcolor(input[nfiles].expos, ctmp);
269	greg	2.18	} else if (isaspect(s))
270	greg	2.17	input[nfiles].pa *= aspectval(s);
271	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
272	greg	2.10	gotview++;
273	greg	2.39
274			if (echoheader) { /* echo line */
275			putchar('\t');
276			return(fputs(s, stdout));
277			}
278			return(0);
279	greg	1.16	}
280	greg	1.15
281	greg	1.16
282	schorsch	2.32	static void
283			checkfile(void) /* ready a file */
284	greg	1.16	{
285			register int i;
286			/* process header */
287	greg	2.10	gotview = 0;
288	greg	2.39	if (echoheader) {
289			fputs(input[nfiles].name, stdout);
290			fputs(":\n", stdout);
291			}
292			getheader(input[nfiles].fp, headline, NULL);
293	greg	2.22	if (wrongformat < 0) {
294	greg	1.16	eputs(input[nfiles].name);
295	greg	2.22	eputs(": not a Radiance picture\n");
296	greg	1.16	quit(1);
297			}
298	greg	2.22	if (wrongformat > 0) {
299			wputs(input[nfiles].name);
300			wputs(": warning -- incompatible picture format\n");
301			}
302	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
303			input[nfiles].vw.type = 0;
304			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
305	greg	1.16	eputs(input[nfiles].name);
306			eputs(": bad picture size\n");
307			quit(1);
308			}
309	greg	1.18	if (xmax == 0 && ymax == 0) {
310	greg	2.10	xmax = scanlen(&input[nfiles].rs);
311			ymax = numscans(&input[nfiles].rs);
312			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
313			numscans(&input[nfiles].rs) != ymax) {
314	greg	1.16	eputs(input[nfiles].name);
315			eputs(": resolution mismatch\n");
316			quit(1);
317			}
318			/* allocate scanlines */
319			for (i = 0; i < WINSIZ; i++)
320	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
321	greg	1.15	}
322
323
324	schorsch	2.32	static double
325			rgb_bright(
326			COLOR clr
327			)
328	greg	2.16	{
329			return(bright(clr));
330			}
331
332
333	schorsch	2.32	static double
334			xyz_bright(
335			COLOR clr
336			)
337	greg	2.16	{
338			return(clr[CIEY]);
339			}
340
341
342			double (*ourbright)() = rgb_bright;
343
344
345	schorsch	2.32	static void
346			init(void) /* perform final setup */
347	greg	1.15	{
348	greg	1.16	register int i;
349	greg	1.15	/* define constants */
350	greg	2.19	varset("PI", ':', PI);
351	greg	1.15	varset(vnfiles, ':', (double)nfiles);
352	greg	1.18	varset(vxmax, ':', (double)xmax);
353			varset(vymax, ':', (double)ymax);
354	greg	1.15	/* set functions */
355			for (i = 0; i < 3; i++) {
356	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
357	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
358			}
359	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
360	greg	1.15	funset(vbrtin, 1, '=', l_colin);
361	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
362			for (i = 0; i < 7; i++)
363	greg	2.10	funset(vray[i], 1, '=', l_ray);
364	greg	2.17	funset(vpsize, 1, '=', l_psize);
365	greg	2.16	/* set brightness function */
366	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
367			varset(vwhteff, ':', 1.0);
368	greg	2.16	ourbright = xyz_bright;
369	greg	2.18	} else
370			varset(vwhteff, ':', WHTEFFICACY);
371	greg	1.1	}
372
373
374	schorsch	2.32	static void
375			combine(void) /* combine pictures */
376	greg	1.1	{
377	greg	1.8	EPNODE coldef[3], brtdef;
378	greg	1.1	COLOR *scanout;
379	greg	1.8	double d;
380	greg	1.1	register int i, j;
381			/* check defined variables */
382	greg	1.4	for (j = 0; j < 3; j++) {
383			if (vardefined(vcolout[j]))
384			coldef[j] = eparse(vcolout[j]);
385			else
386			coldef[j] = NULL;
387			}
388	greg	1.8	if (vardefined(vbrtout))
389			brtdef = eparse(vbrtout);
390			else
391			brtdef = NULL;
392	greg	1.1	/* allocate scanline */
393			scanout = (COLOR )emalloc(xressizeof(COLOR));
394	greg	1.18	/* set input position */
395			yscan = ymax+MIDSCN;
396	greg	1.1	/* combine files */
397			for (ypos = yres-1; ypos >= 0; ypos--) {
398	greg	1.14	advance();
399	greg	1.11	varset(vypos, '=', (double)ypos);
400	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
401	greg	2.42	xscan = (xpos+.5)*xmax/xres;
402	greg	1.11	varset(vxpos, '=', (double)xpos);
403	greg	1.8	eclock++;
404			if (brtdef != NULL) {
405			d = evalue(brtdef);
406			if (d < 0.0)
407			d = 0.0;
408			setcolor(scanout[xpos], d, d, d);
409			} else {
410			for (j = 0; j < 3; j++) {
411			if (coldef[j] != NULL) {
412	greg	1.13	d = evalue(coldef[j]);
413	greg	1.8	} else {
414	greg	1.13	d = 0.0;
415	greg	1.8	for (i = 0; i < nfiles; i++)
416	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
417	greg	1.1	}
418	greg	1.13	if (d < 0.0)
419			d = 0.0;
420			colval(scanout[xpos],j) = d;
421	greg	1.8	}
422	greg	1.1	}
423	greg	1.8	}
424			if (fwritescan(scanout, xres, stdout) < 0) {
425			perror("write error");
426			quit(1);
427			}
428	greg	1.1	}
429	greg	2.22	efree((char *)scanout);
430	greg	1.1	}
431
432
433	schorsch	2.32	static void
434			advance(void) /* read in data for next scanline */
435	greg	1.14	{
436	greg	1.18	int ytarget;
437	greg	1.14	register COLOR *st;
438			register int i, j;
439
440	greg	2.42	for (ytarget = (ypos+.5)*ymax/yres; yscan > ytarget; yscan--)
441	greg	1.18	for (i = 0; i < nfiles; i++) {
442			st = input[i].scan[WINSIZ-1];
443			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
444			input[i].scan[j] = input[i].scan[j-1];
445			input[i].scan[0] = st;
446			if (yscan <= MIDSCN) /* hit bottom? */
447			continue;
448	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
449	greg	1.18	eputs(input[i].name);
450			eputs(": read error\n");
451			quit(1);
452			}
453	greg	2.37	for (j = 0; j < xmax; j++) /* adjust color */
454			multcolor(st[j], input[i].coef);
455	greg	1.14	}
456			}
457
458
459	schorsch	2.32	static double
460			l_expos( /* return picture exposure */
461	greg	2.42	char *nam
462	schorsch	2.32	)
463	greg	1.1	{
464	greg	2.42	int fn, n;
465			double d;
466	greg	1.14
467	greg	2.42	d = argument(1);
468			if (d <= -0.5 \|\| d >= nfiles+0.5) {
469			errno = EDOM;
470			return(0.0);
471			}
472			if (d < 0.5)
473			return((double)nfiles);
474			fn = d - 0.5;
475	greg	1.17	if (nam == vbrtexp)
476	greg	2.16	return((*ourbright)(input[fn].expos));
477	greg	1.15	n = 3;
478			while (n--)
479	greg	1.17	if (nam == vcolexp[n])
480			return(colval(input[fn].expos,n));
481			eputs("Bad call to l_expos()!\n");
482	greg	1.15	quit(1);
483	schorsch	2.32	return 1; /* pro forma return */
484	greg	1.15	}
485
486
487	schorsch	2.32	static double
488	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
489	greg	2.18	{
490	greg	2.42	int fn;
491			double d;
492	greg	2.18
493	greg	2.42	d = argument(1);
494			if (d <= -0.5 \|\| d >= nfiles+0.5) {
495			errno = EDOM;
496			return(0.0);
497			}
498			if (d < 0.5)
499			return((double)nfiles);
500			fn = d - 0.5;
501	greg	2.18	return(input[fn].pa);
502			}
503
504
505	schorsch	2.32	static double
506			l_colin( /* return color value for picture */
507			register char *nam
508			)
509	greg	1.15	{
510			int fn;
511			register int n, xoff, yoff;
512			double d;
513
514	greg	2.42	d = argument(1);
515			if (d <= -0.5 \|\| d >= nfiles+0.5) {
516	greg	1.15	errno = EDOM;
517			return(0.0);
518			}
519	greg	2.42	if (d < 0.5)
520			return((double)nfiles);
521			fn = d - 0.5;
522	greg	1.14	xoff = yoff = 0;
523			n = nargum();
524			if (n >= 2) {
525			d = argument(2);
526			if (d < 0.0) {
527			xoff = d-.5;
528	greg	1.18	if (xscan+xoff < 0)
529			xoff = -xscan;
530	greg	1.14	} else {
531			xoff = d+.5;
532	greg	1.18	if (xscan+xoff >= xmax)
533			xoff = xmax-1-xscan;
534	greg	1.14	}
535			}
536			if (n >= 3) {
537			d = argument(3);
538			if (d < 0.0) {
539			yoff = d-.5;
540			if (yoff+MIDSCN < 0)
541			yoff = -MIDSCN;
542	greg	1.18	if (yscan+yoff < 0)
543			yoff = -yscan;
544	greg	1.14	} else {
545			yoff = d+.5;
546			if (yoff+MIDSCN >= WINSIZ)
547			yoff = WINSIZ-1-MIDSCN;
548	greg	1.18	if (yscan+yoff >= ymax)
549			yoff = ymax-1-yscan;
550	greg	1.14	}
551			}
552	greg	1.15	if (nam == vbrtin)
553	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
554	greg	1.15	n = 3;
555			while (n--)
556			if (nam == vcolin[n])
557	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
558	greg	1.15	eputs("Bad call to l_colin()!\n");
559	greg	2.10	quit(1);
560	schorsch	2.32	return 1; /* pro forma return */
561	greg	2.10	}
562
563
564	schorsch	2.32	static double
565			l_ray( /* return ray origin or direction */
566			register char *nam
567			)
568	greg	2.10	{
569	greg	2.15	static unsigned long ltick[MAXINP];
570	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
571	greg	2.18	static double ldist[MAXINP];
572	schorsch	2.25	RREAL loc[2];
573	greg	2.42	double d;
574	greg	2.10	int fn;
575			register int i;
576
577	greg	2.42	d = argument(1);
578			if (d <= -0.5 \|\| d >= nfiles+0.5) {
579	greg	2.10	errno = EDOM;
580			return(0.0);
581			}
582	greg	2.42	if (d < 0.5)
583			return((double)nfiles);
584			fn = d - 0.5;
585	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
586	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
587			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
588	greg	2.20	ldist[fn] = -1.0;
589	greg	2.10	if (input[fn].vw.type == 0)
590	greg	2.12	errno = EDOM;
591	greg	2.10	else {
592	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
593	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
594			&input[fn].vw, loc[0], loc[1]);
595	greg	2.10	}
596	greg	2.18	ltick[fn] = eclock;
597	greg	2.10	}
598	greg	2.18	if (nam == vray[i=6])
599			return(ldist[fn]);
600	greg	2.10	while (i--)
601			if (nam == vray[i])
602			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
603			eputs("Bad call to l_ray()!\n");
604	greg	1.15	quit(1);
605	schorsch	2.32	return 1; /* pro forma return */
606	greg	2.17	}
607
608
609	schorsch	2.32	static double
610	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
611	greg	2.17	{
612			static unsigned long ltick[MAXINP];
613			static double psize[MAXINP];
614	greg	2.18	FVECT dir0, org, dirx, diry;
615	schorsch	2.25	RREAL locx[2], locy[2];
616	greg	2.17	double d;
617			int fn;
618	greg	2.18	register int i;
619	greg	2.17
620			d = argument(1);
621	greg	2.42	if (d <= -0.5 \|\| d >= nfiles+0.5) {
622	greg	2.17	errno = EDOM;
623			return(0.0);
624			}
625	greg	2.42	if (d < 0.5)
626			return((double)nfiles);
627			fn = d - 0.5;
628	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
629	greg	2.18	psize[fn] = 0.0;
630			if (input[fn].vw.type == 0)
631	greg	2.17	errno = EDOM;
632	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
633	greg	2.36	funvalue(vray[6], 1, &d) >= -FTINY) {
634	greg	2.18	for (i = 0; i < 3; i++)
635			dir0[i] = funvalue(vray[3+i], 1, &d);
636			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
637			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
638			if (viewray(org, dirx, &input[fn].vw,
639	greg	2.35	locx[0], locx[1]) >= -FTINY &&
640	greg	2.18	viewray(org, diry, &input[fn].vw,
641	greg	2.35	locy[0], locy[1]) >= -FTINY) {
642	greg	2.17	/* approximate solid angle */
643	greg	2.18	for (i = 0; i < 3; i++) {
644			dirx[i] -= dir0[i];
645			diry[i] -= dir0[i];
646			}
647			fcross(dir0, dirx, diry);
648	greg	2.35	psize[fn] = VLEN(dir0);
649	greg	2.17	}
650			}
651	greg	2.18	ltick[fn] = eclock;
652			}
653	greg	2.17	return(psize[fn]);
654	greg	1.1	}
655
656
657	schorsch	2.29	extern void
658			wputs(char *msg)
659	greg	1.1	{
660			if (!nowarn)
661			eputs(msg);
662			}
663
664
665	schorsch	2.29	extern void
666			eputs(char *msg)
667	greg	1.1	{
668			fputs(msg, stderr);
669			}
670
671
672	schorsch	2.29	extern void
673			quit(int code) /* exit gracefully */
674	greg	2.4	{
675	greg	2.5	register int i;
676			/* close input files */
677			for (i = 0; i < nfiles; i++)
678	greg	2.6	if (input[i].name == Command)
679			pclose(input[i].fp);
680			else
681			fclose(input[i].fp);
682	greg	1.1	exit(code);
683			}