src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.51 2018/08/02 18:33:43 greg Exp $";
#endif
/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

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

#define MAXINP          1024            /* maximum number of input files */
#define WINSIZ          127             /* 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 */

VIEW    *commvp = NULL;                 /* common view parameters */

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];
        esupport |= E_VARIABLE|E_FUNCTION|E_RCONST;
        esupport &= ~(E_OUTCHAN|E_INCHAN);
                                                /* 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++) {
                char    *fpath;
                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':
                                fpath = getpath(argv[++a], getrlibpath(), 0);
                                if (fpath == NULL) {
                                        eputs(argv[0]);
                                        eputs(": cannot find file '");
                                        eputs(argv[a]);
                                        eputs("'\n");
                                        quit(1);
                                }
                                fcompile(fpath);
                                continue;
                        case 'e':
                                scompile(argv[++a], NULL, 0);
                                continue;
                        }
                break;
        }
                                                /* get output resolution */
        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 (commvp != NULL) {
                fputs(VIEWSTR, stdout);
                fprintview(commvp, stdout);
                fputc('\n', 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[MAXFMTLEN];
        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 */
{
        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;
        else if (commvp == NULL)
                commvp = &input[nfiles].vw;
        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 */
{
        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);
                                                /* these may be overridden */
        varset(vxres, ':', (double)xmax);
        varset(vyres, ':', (double)ymax);
}


static void
combine(void)                   /* combine pictures */
{
        EPNODE  *coldef[3], *brtdef;
        COLOR   *scanout;
        double  d;
        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;
        COLOR   *st;
        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 */
        char    *nam
)
{
        int     fn;
        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 */
        char    *nam
)
{
        static unsigned long    ltick[MAXINP];
        static FVECT    lorg[MAXINP], ldir[MAXINP];
        static double   ldist[MAXINP];
        RREAL   loc[2];
        double  d;
        int     fn;
        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;
        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 */
{
        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:	2.52
Committed:	Wed Apr 3 20:16:31 2019 UTC (5 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R3
Changes since 2.51:	+6 -6 lines
Log Message:	Changed common view parameters to a pointer
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.52	static const char RCSid[] = "$Id: pcomb.c,v 2.51 2018/08/02 18:33:43 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	greg	2.45	#include "paths.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	2.46	#define WINSIZ 127 /* 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	2.52	VIEW commvp = NULL; / common view parameters */
35	greg	2.49
36	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
37
38	greg	2.31	char StandardInput[] = "<stdin>";
39	greg	2.6	char Command[] = "<Command>";
40	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
41			char vcolout[3][4] = {"ro", "go", "bo"};
42	greg	1.15	char vbrtin[] = "li";
43			char vbrtout[] = "lo";
44	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
45	greg	1.17	char vbrtexp[] = "le";
46	greg	2.18	char vpixaspect[] = "pa";
47	greg	1.1
48	greg	2.18	char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"};
49	greg	2.10
50	greg	2.17	char vpsize[] = "S";
51
52	greg	1.18	char vnfiles[] = "nfiles";
53	greg	2.18	char vwhteff[] = "WE";
54	greg	1.18	char vxmax[] = "xmax";
55			char vymax[] = "ymax";
56			char vxres[] = "xres";
57			char vyres[] = "yres";
58			char vxpos[] = "x";
59			char vypos[] = "y";
60	greg	1.1
61			int nowarn = 0; /* no warning messages? */
62
63	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
64	greg	1.9
65	greg	1.18	int xscan, yscan; /* input position */
66	greg	1.1
67	greg	1.18	int xres, yres; /* output resolution */
68	greg	1.1
69	greg	1.18	int xpos, ypos; /* output position */
70
71	greg	2.10	char progname; / global argv[0] */
72
73	greg	2.39	int echoheader = 1;
74	greg	1.10	int wrongformat = 0;
75	greg	2.10	int gotview;
76	greg	1.1
77	greg	1.10
78	greg	2.39	static gethfunc headline;
79	schorsch	2.32	static void checkfile(void);
80			static double rgb_bright(COLOR clr);
81			static double xyz_bright(COLOR clr);
82			static void init(void);
83			static void combine(void);
84			static void advance(void);
85			static double l_expos(char *nam);
86			static double l_pixaspect(char *nm);
87			static double l_colin(char *nam);
88			static double l_ray(char *nam);
89			static double l_psize(char *nm);
90
91
92			int
93			main(
94			int argc,
95			char *argv[]
96			)
97	greg	1.1	{
98	greg	1.18	int original;
99	greg	1.3	double f;
100	schorsch	2.32	int a;
101	greg	2.47
102	schorsch	2.23	SET_DEFAULT_BINARY();
103			SET_FILE_BINARY(stdin);
104			SET_FILE_BINARY(stdout);
105	greg	2.10	progname = argv[0];
106	greg	2.47	esupport \|= E_VARIABLE\|E_FUNCTION\|E_RCONST;
107			esupport &= ~(E_OUTCHAN\|E_INCHAN);
108	greg	1.15	/* scan options */
109			for (a = 1; a < argc; a++) {
110	greg	1.1	if (argv[a][0] == '-')
111			switch (argv[a][1]) {
112			case 'x':
113			case 'y':
114	greg	1.18	a++;
115	greg	1.15	continue;
116	greg	1.1	case 'w':
117			nowarn = !nowarn;
118	greg	1.15	continue;
119	greg	2.39	case 'h':
120			echoheader = !echoheader;
121			continue;
122	greg	1.1	case 'f':
123			case 'e':
124	greg	1.16	a++;
125	greg	1.15	continue;
126	greg	1.1	}
127	greg	1.15	break;
128			}
129	greg	2.14	newheader("RADIANCE", stdout); /* start header */
130	greg	2.22	fputnow(stdout);
131	greg	1.15	/* process files */
132	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
133	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
134	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
135	schorsch	2.26	input[nfiles].vw = stdview;
136	greg	2.17	input[nfiles].pa = 1.0;
137	greg	1.17	}
138	greg	1.1	nfiles = 0;
139	greg	1.18	original = 0;
140	greg	1.1	for ( ; a < argc; a++) {
141			if (nfiles >= MAXINP) {
142			eputs(argv[0]);
143			eputs(": too many picture files\n");
144			quit(1);
145			}
146	greg	1.3	if (argv[a][0] == '-')
147			switch (argv[a][1]) {
148			case '\0':
149	greg	2.31	input[nfiles].name = StandardInput;
150	greg	1.3	input[nfiles].fp = stdin;
151			break;
152	greg	1.17	case 'o':
153			original++;
154	greg	1.22	continue;
155	greg	1.3	case 's':
156			f = atof(argv[++a]);
157			scalecolor(input[nfiles].coef, f);
158			continue;
159			case 'c':
160			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
161			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
162			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
163			continue;
164			default:
165			goto usage;
166			}
167			else {
168	greg	2.2	if (argv[a][0] == '!') {
169	greg	2.6	input[nfiles].name = Command;
170	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
171			} else {
172			input[nfiles].name = argv[a];
173			input[nfiles].fp = fopen(argv[a], "r");
174			}
175	greg	1.1	if (input[nfiles].fp == NULL) {
176	greg	1.6	perror(argv[a]);
177	greg	1.1	quit(1);
178			}
179			}
180	greg	1.16	checkfile();
181	greg	1.18	if (original) {
182			colval(input[nfiles].coef,RED) /=
183			colval(input[nfiles].expos,RED);
184			colval(input[nfiles].coef,GRN) /=
185			colval(input[nfiles].expos,GRN);
186			colval(input[nfiles].coef,BLU) /=
187			colval(input[nfiles].expos,BLU);
188	greg	2.22	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
189	greg	1.18	}
190			nfiles++;
191	greg	1.17	original = 0;
192	greg	1.15	}
193	greg	1.18	init(); /* set constants */
194	greg	1.15	/* go back and get expressions */
195			for (a = 1; a < argc; a++) {
196	greg	2.50	char *fpath;
197	greg	1.15	if (argv[a][0] == '-')
198			switch (argv[a][1]) {
199			case 'x':
200	greg	1.21	varset(vxres, ':', eval(argv[++a]));
201	greg	1.18	continue;
202	greg	1.15	case 'y':
203	greg	1.21	varset(vyres, ':', eval(argv[++a]));
204	greg	1.16	continue;
205	greg	1.15	case 'w':
206			continue;
207	greg	2.40	case 'h':
208			continue;
209	greg	1.15	case 'f':
210	greg	2.50	fpath = getpath(argv[++a], getrlibpath(), 0);
211			if (fpath == NULL) {
212			eputs(argv[0]);
213			eputs(": cannot find file '");
214			eputs(argv[a]);
215			eputs("'\n");
216			quit(1);
217			}
218			fcompile(fpath);
219	greg	1.15	continue;
220			case 'e':
221			scompile(argv[++a], NULL, 0);
222			continue;
223			}
224			break;
225			}
226	greg	2.48	/* get output resolution */
227	greg	1.18	xres = varvalue(vxres) + .5;
228			yres = varvalue(vyres) + .5;
229			if (xres <= 0 \|\| yres <= 0) {
230			eputs(argv[0]);
231			eputs(": illegal output resolution\n");
232			quit(1);
233			}
234	greg	1.15	/* complete header */
235			printargs(argc, argv, stdout);
236	greg	2.52	if (commvp != NULL) {
237	greg	2.49	fputs(VIEWSTR, stdout);
238	greg	2.52	fprintview(commvp, stdout);
239	greg	2.49	fputc('\n', stdout);
240			}
241	greg	2.16	if (strcmp(ourfmt, PICFMT))
242			fputformat(ourfmt, stdout); /* print format if known */
243	greg	1.15	putchar('\n');
244	greg	1.23	fprtresolu(xres, yres, stdout);
245	greg	1.15	/* combine pictures */
246			combine();
247			quit(0);
248			usage:
249			eputs("Usage: ");
250			eputs(argv[0]);
251			eputs(
252	greg	2.43	" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] hdr ..]\n");
253	greg	1.15	quit(1);
254	schorsch	2.32	return 1; /* pro forma return */
255	greg	1.15	}
256
257
258	schorsch	2.30	static int
259	greg	2.39	headline( /* check header line & echo if requested */
260	schorsch	2.30	char *s,
261			void *p
262			)
263	greg	1.15	{
264	greg	2.51	char fmt[MAXFMTLEN];
265	greg	1.15	double d;
266			COLOR ctmp;
267
268	greg	2.14	if (isheadid(s)) /* header id */
269	gwlarson	2.21	return(0); /* don't echo */
270	greg	2.14	if (formatval(fmt, s)) { /* check format */
271	greg	2.16	if (globmatch(ourfmt, fmt)) {
272			wrongformat = 0;
273			strcpy(ourfmt, fmt);
274			} else
275	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
276	gwlarson	2.21	return(0); /* don't echo */
277	greg	1.17	}
278			if (isexpos(s)) { /* exposure */
279			d = exposval(s);
280			scalecolor(input[nfiles].expos, d);
281			} else if (iscolcor(s)) { /* color correction */
282	greg	1.15	colcorval(ctmp, s);
283	greg	1.17	multcolor(input[nfiles].expos, ctmp);
284	greg	2.18	} else if (isaspect(s))
285	greg	2.17	input[nfiles].pa *= aspectval(s);
286	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
287	greg	2.10	gotview++;
288	greg	2.39
289			if (echoheader) { /* echo line */
290			putchar('\t');
291			return(fputs(s, stdout));
292			}
293			return(0);
294	greg	1.16	}
295	greg	1.15
296	greg	1.16
297	schorsch	2.32	static void
298			checkfile(void) /* ready a file */
299	greg	1.16	{
300	greg	2.47	int i;
301	greg	1.16	/* process header */
302	greg	2.10	gotview = 0;
303	greg	2.39	if (echoheader) {
304			fputs(input[nfiles].name, stdout);
305			fputs(":\n", stdout);
306			}
307			getheader(input[nfiles].fp, headline, NULL);
308	greg	2.22	if (wrongformat < 0) {
309	greg	1.16	eputs(input[nfiles].name);
310	greg	2.22	eputs(": not a Radiance picture\n");
311	greg	1.16	quit(1);
312			}
313	greg	2.22	if (wrongformat > 0) {
314			wputs(input[nfiles].name);
315			wputs(": warning -- incompatible picture format\n");
316			}
317	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
318			input[nfiles].vw.type = 0;
319	greg	2.52	else if (commvp == NULL)
320			commvp = &input[nfiles].vw;
321	greg	2.10	if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
322	greg	1.16	eputs(input[nfiles].name);
323			eputs(": bad picture size\n");
324			quit(1);
325			}
326	greg	1.18	if (xmax == 0 && ymax == 0) {
327	greg	2.10	xmax = scanlen(&input[nfiles].rs);
328			ymax = numscans(&input[nfiles].rs);
329			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
330			numscans(&input[nfiles].rs) != ymax) {
331	greg	1.16	eputs(input[nfiles].name);
332			eputs(": resolution mismatch\n");
333			quit(1);
334			}
335			/* allocate scanlines */
336			for (i = 0; i < WINSIZ; i++)
337	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
338	greg	1.15	}
339
340
341	schorsch	2.32	static double
342			rgb_bright(
343			COLOR clr
344			)
345	greg	2.16	{
346			return(bright(clr));
347			}
348
349
350	schorsch	2.32	static double
351			xyz_bright(
352			COLOR clr
353			)
354	greg	2.16	{
355			return(clr[CIEY]);
356			}
357
358
359			double (*ourbright)() = rgb_bright;
360
361
362	schorsch	2.32	static void
363			init(void) /* perform final setup */
364	greg	1.15	{
365	greg	2.47	int i;
366	greg	1.15	/* define constants */
367	greg	2.19	varset("PI", ':', PI);
368	greg	1.15	varset(vnfiles, ':', (double)nfiles);
369	greg	1.18	varset(vxmax, ':', (double)xmax);
370			varset(vymax, ':', (double)ymax);
371	greg	1.15	/* set functions */
372			for (i = 0; i < 3; i++) {
373	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
374	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
375			}
376	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
377	greg	1.15	funset(vbrtin, 1, '=', l_colin);
378	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
379			for (i = 0; i < 7; i++)
380	greg	2.10	funset(vray[i], 1, '=', l_ray);
381	greg	2.17	funset(vpsize, 1, '=', l_psize);
382	greg	2.16	/* set brightness function */
383	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
384			varset(vwhteff, ':', 1.0);
385	greg	2.16	ourbright = xyz_bright;
386	greg	2.18	} else
387			varset(vwhteff, ':', WHTEFFICACY);
388	greg	2.48	/* these may be overridden */
389			varset(vxres, ':', (double)xmax);
390			varset(vyres, ':', (double)ymax);
391	greg	1.1	}
392
393
394	schorsch	2.32	static void
395			combine(void) /* combine pictures */
396	greg	1.1	{
397	greg	1.8	EPNODE coldef[3], brtdef;
398	greg	1.1	COLOR *scanout;
399	greg	1.8	double d;
400	greg	2.47	int i, j;
401	greg	1.1	/* check defined variables */
402	greg	1.4	for (j = 0; j < 3; j++) {
403			if (vardefined(vcolout[j]))
404			coldef[j] = eparse(vcolout[j]);
405			else
406			coldef[j] = NULL;
407			}
408	greg	1.8	if (vardefined(vbrtout))
409			brtdef = eparse(vbrtout);
410			else
411			brtdef = NULL;
412	greg	1.1	/* allocate scanline */
413			scanout = (COLOR )emalloc(xressizeof(COLOR));
414	greg	1.18	/* set input position */
415			yscan = ymax+MIDSCN;
416	greg	1.1	/* combine files */
417			for (ypos = yres-1; ypos >= 0; ypos--) {
418	greg	1.14	advance();
419	greg	1.11	varset(vypos, '=', (double)ypos);
420	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
421	greg	2.42	xscan = (xpos+.5)*xmax/xres;
422	greg	1.11	varset(vxpos, '=', (double)xpos);
423	greg	1.8	eclock++;
424			if (brtdef != NULL) {
425			d = evalue(brtdef);
426			if (d < 0.0)
427			d = 0.0;
428			setcolor(scanout[xpos], d, d, d);
429			} else {
430			for (j = 0; j < 3; j++) {
431			if (coldef[j] != NULL) {
432	greg	1.13	d = evalue(coldef[j]);
433	greg	1.8	} else {
434	greg	1.13	d = 0.0;
435	greg	1.8	for (i = 0; i < nfiles; i++)
436	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
437	greg	1.1	}
438	greg	1.13	if (d < 0.0)
439			d = 0.0;
440			colval(scanout[xpos],j) = d;
441	greg	1.8	}
442	greg	1.1	}
443	greg	1.8	}
444			if (fwritescan(scanout, xres, stdout) < 0) {
445			perror("write error");
446			quit(1);
447			}
448	greg	1.1	}
449	greg	2.22	efree((char *)scanout);
450	greg	1.1	}
451
452
453	schorsch	2.32	static void
454			advance(void) /* read in data for next scanline */
455	greg	1.14	{
456	greg	1.18	int ytarget;
457	greg	2.47	COLOR *st;
458			int i, j;
459	greg	1.14
460	greg	2.42	for (ytarget = (ypos+.5)*ymax/yres; yscan > ytarget; yscan--)
461	greg	1.18	for (i = 0; i < nfiles; i++) {
462			st = input[i].scan[WINSIZ-1];
463			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
464			input[i].scan[j] = input[i].scan[j-1];
465			input[i].scan[0] = st;
466			if (yscan <= MIDSCN) /* hit bottom? */
467			continue;
468	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
469	greg	1.18	eputs(input[i].name);
470			eputs(": read error\n");
471			quit(1);
472			}
473	greg	2.37	for (j = 0; j < xmax; j++) /* adjust color */
474			multcolor(st[j], input[i].coef);
475	greg	1.14	}
476			}
477
478
479	schorsch	2.32	static double
480			l_expos( /* return picture exposure */
481	greg	2.42	char *nam
482	schorsch	2.32	)
483	greg	1.1	{
484	greg	2.42	int fn, n;
485			double d;
486	greg	1.14
487	greg	2.42	d = argument(1);
488			if (d <= -0.5 \|\| d >= nfiles+0.5) {
489			errno = EDOM;
490			return(0.0);
491			}
492			if (d < 0.5)
493			return((double)nfiles);
494			fn = d - 0.5;
495	greg	1.17	if (nam == vbrtexp)
496	greg	2.16	return((*ourbright)(input[fn].expos));
497	greg	1.15	n = 3;
498			while (n--)
499	greg	1.17	if (nam == vcolexp[n])
500			return(colval(input[fn].expos,n));
501			eputs("Bad call to l_expos()!\n");
502	greg	1.15	quit(1);
503	schorsch	2.32	return 1; /* pro forma return */
504	greg	1.15	}
505
506
507	schorsch	2.32	static double
508	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
509	greg	2.18	{
510	greg	2.42	int fn;
511			double d;
512	greg	2.18
513	greg	2.42	d = argument(1);
514			if (d <= -0.5 \|\| d >= nfiles+0.5) {
515			errno = EDOM;
516			return(0.0);
517			}
518			if (d < 0.5)
519			return((double)nfiles);
520			fn = d - 0.5;
521	greg	2.18	return(input[fn].pa);
522			}
523
524
525	schorsch	2.32	static double
526			l_colin( /* return color value for picture */
527	greg	2.47	char *nam
528	schorsch	2.32	)
529	greg	1.15	{
530			int fn;
531	greg	2.47	int n, xoff, yoff;
532	greg	1.15	double d;
533
534	greg	2.42	d = argument(1);
535			if (d <= -0.5 \|\| d >= nfiles+0.5) {
536	greg	1.15	errno = EDOM;
537			return(0.0);
538			}
539	greg	2.42	if (d < 0.5)
540			return((double)nfiles);
541			fn = d - 0.5;
542	greg	1.14	xoff = yoff = 0;
543			n = nargum();
544			if (n >= 2) {
545			d = argument(2);
546			if (d < 0.0) {
547			xoff = d-.5;
548	greg	1.18	if (xscan+xoff < 0)
549			xoff = -xscan;
550	greg	1.14	} else {
551			xoff = d+.5;
552	greg	1.18	if (xscan+xoff >= xmax)
553			xoff = xmax-1-xscan;
554	greg	1.14	}
555			}
556			if (n >= 3) {
557			d = argument(3);
558			if (d < 0.0) {
559			yoff = d-.5;
560			if (yoff+MIDSCN < 0)
561			yoff = -MIDSCN;
562	greg	1.18	if (yscan+yoff < 0)
563			yoff = -yscan;
564	greg	1.14	} else {
565			yoff = d+.5;
566			if (yoff+MIDSCN >= WINSIZ)
567			yoff = WINSIZ-1-MIDSCN;
568	greg	1.18	if (yscan+yoff >= ymax)
569			yoff = ymax-1-yscan;
570	greg	1.14	}
571			}
572	greg	1.15	if (nam == vbrtin)
573	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
574	greg	1.15	n = 3;
575			while (n--)
576			if (nam == vcolin[n])
577	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
578	greg	1.15	eputs("Bad call to l_colin()!\n");
579	greg	2.10	quit(1);
580	schorsch	2.32	return 1; /* pro forma return */
581	greg	2.10	}
582
583
584	schorsch	2.32	static double
585			l_ray( /* return ray origin or direction */
586	greg	2.47	char *nam
587	schorsch	2.32	)
588	greg	2.10	{
589	greg	2.15	static unsigned long ltick[MAXINP];
590	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
591	greg	2.18	static double ldist[MAXINP];
592	schorsch	2.25	RREAL loc[2];
593	greg	2.42	double d;
594	greg	2.10	int fn;
595	greg	2.47	int i;
596	greg	2.10
597	greg	2.42	d = argument(1);
598			if (d <= -0.5 \|\| d >= nfiles+0.5) {
599	greg	2.10	errno = EDOM;
600			return(0.0);
601			}
602	greg	2.42	if (d < 0.5)
603			return((double)nfiles);
604			fn = d - 0.5;
605	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
606	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
607			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
608	greg	2.20	ldist[fn] = -1.0;
609	greg	2.10	if (input[fn].vw.type == 0)
610	greg	2.12	errno = EDOM;
611	greg	2.10	else {
612	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
613	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
614			&input[fn].vw, loc[0], loc[1]);
615	greg	2.10	}
616	greg	2.18	ltick[fn] = eclock;
617	greg	2.10	}
618	greg	2.18	if (nam == vray[i=6])
619			return(ldist[fn]);
620	greg	2.10	while (i--)
621			if (nam == vray[i])
622			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
623			eputs("Bad call to l_ray()!\n");
624	greg	1.15	quit(1);
625	schorsch	2.32	return 1; /* pro forma return */
626	greg	2.17	}
627
628
629	schorsch	2.32	static double
630	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
631	greg	2.17	{
632			static unsigned long ltick[MAXINP];
633			static double psize[MAXINP];
634	greg	2.18	FVECT dir0, org, dirx, diry;
635	schorsch	2.25	RREAL locx[2], locy[2];
636	greg	2.17	double d;
637			int fn;
638	greg	2.47	int i;
639	greg	2.17
640			d = argument(1);
641	greg	2.42	if (d <= -0.5 \|\| d >= nfiles+0.5) {
642	greg	2.17	errno = EDOM;
643			return(0.0);
644			}
645	greg	2.42	if (d < 0.5)
646			return((double)nfiles);
647			fn = d - 0.5;
648	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
649	greg	2.18	psize[fn] = 0.0;
650			if (input[fn].vw.type == 0)
651	greg	2.17	errno = EDOM;
652	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
653	greg	2.36	funvalue(vray[6], 1, &d) >= -FTINY) {
654	greg	2.18	for (i = 0; i < 3; i++)
655			dir0[i] = funvalue(vray[3+i], 1, &d);
656			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
657			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
658			if (viewray(org, dirx, &input[fn].vw,
659	greg	2.35	locx[0], locx[1]) >= -FTINY &&
660	greg	2.18	viewray(org, diry, &input[fn].vw,
661	greg	2.35	locy[0], locy[1]) >= -FTINY) {
662	greg	2.17	/* approximate solid angle */
663	greg	2.18	for (i = 0; i < 3; i++) {
664			dirx[i] -= dir0[i];
665			diry[i] -= dir0[i];
666			}
667			fcross(dir0, dirx, diry);
668	greg	2.35	psize[fn] = VLEN(dir0);
669	greg	2.17	}
670			}
671	greg	2.18	ltick[fn] = eclock;
672			}
673	greg	2.17	return(psize[fn]);
674	greg	1.1	}
675
676
677	schorsch	2.29	extern void
678			wputs(char *msg)
679	greg	1.1	{
680			if (!nowarn)
681			eputs(msg);
682			}
683
684
685	schorsch	2.29	extern void
686			eputs(char *msg)
687	greg	1.1	{
688			fputs(msg, stderr);
689			}
690
691
692	schorsch	2.29	extern void
693			quit(int code) /* exit gracefully */
694	greg	2.4	{
695	greg	2.47	int i;
696	greg	2.5	/* close input files */
697			for (i = 0; i < nfiles; i++)
698	greg	2.6	if (input[i].name == Command)
699			pclose(input[i].fp);
700			else
701			fclose(input[i].fp);
702	greg	1.1	exit(code);
703			}