src/px/pcomb.c

#ifndef lint
static const char       RCSid[] = "$Id: pcomb.c,v 2.54 2022/03/22 15:14:42 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(int orig);
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(original);
                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
)
{
        int     orig = *(int *)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 (orig) {                             /* undo exposure? */
                if (isexpos(s)) {
                        d = 1./exposval(s);
                        scalecolor(input[nfiles].coef, d);
                        return(0);      /* don't echo */
                }
                if (iscolcor(s)) {
                        int     i;
                        colcorval(ctmp, s);
                        for (i = 3; i--; )
                                colval(input[nfiles].coef,i) /= colval(ctmp,i);
                        return(0);      /* don't echo */
                }
        } else if (isexpos(s)) {                /* record exposure? */
                d = exposval(s);
                scalecolor(input[nfiles].expos, d);
        } else if (iscolcor(s)) {
                colcorval(ctmp, s);
                multcolor(input[nfiles].expos, ctmp);
        }
        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(int orig)                     /* ready a file */
{
        int     i;
                                        /* process header */
        gotview = 0;
        if (echoheader) {
                fputs(input[nfiles].name, stdout);
                fputs(":\n", stdout);
        }
        getheader(input[nfiles].fp, headline, &orig);
        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(const char *msg)
{
        if (!nowarn)
                eputs(msg);
}


extern void
eputs(const 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:	2.55
Committed:	Mon Feb 6 22:40:21 2023 UTC (15 months, 1 week ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4
Changes since 2.54:	+3 -3 lines
Log Message:	refactor: Changed some char* args to const char* to avoid warnings
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.55	static const char RCSid[] = "$Id: pcomb.c,v 2.54 2022/03/22 15:14:42 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	greg	2.53	static void checkfile(int orig);
80	schorsch	2.32	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	2.53	checkfile(original);
181	greg	1.18	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	greg	2.50	char *fpath;
188	greg	1.15	if (argv[a][0] == '-')
189			switch (argv[a][1]) {
190			case 'x':
191	greg	1.21	varset(vxres, ':', eval(argv[++a]));
192	greg	1.18	continue;
193	greg	1.15	case 'y':
194	greg	1.21	varset(vyres, ':', eval(argv[++a]));
195	greg	1.16	continue;
196	greg	1.15	case 'w':
197			continue;
198	greg	2.40	case 'h':
199			continue;
200	greg	1.15	case 'f':
201	greg	2.50	fpath = getpath(argv[++a], getrlibpath(), 0);
202			if (fpath == NULL) {
203			eputs(argv[0]);
204			eputs(": cannot find file '");
205			eputs(argv[a]);
206			eputs("'\n");
207			quit(1);
208			}
209			fcompile(fpath);
210	greg	1.15	continue;
211			case 'e':
212			scompile(argv[++a], NULL, 0);
213			continue;
214			}
215			break;
216			}
217	greg	2.48	/* get output resolution */
218	greg	1.18	xres = varvalue(vxres) + .5;
219			yres = varvalue(vyres) + .5;
220			if (xres <= 0 \|\| yres <= 0) {
221			eputs(argv[0]);
222			eputs(": illegal output resolution\n");
223			quit(1);
224			}
225	greg	1.15	/* complete header */
226			printargs(argc, argv, stdout);
227	greg	2.52	if (commvp != NULL) {
228	greg	2.49	fputs(VIEWSTR, stdout);
229	greg	2.52	fprintview(commvp, stdout);
230	greg	2.49	fputc('\n', stdout);
231			}
232	greg	2.16	if (strcmp(ourfmt, PICFMT))
233			fputformat(ourfmt, stdout); /* print format if known */
234	greg	1.15	putchar('\n');
235	greg	1.23	fprtresolu(xres, yres, stdout);
236	greg	1.15	/* combine pictures */
237			combine();
238			quit(0);
239			usage:
240			eputs("Usage: ");
241			eputs(argv[0]);
242			eputs(
243	greg	2.43	" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] hdr ..]\n");
244	greg	1.15	quit(1);
245	schorsch	2.32	return 1; /* pro forma return */
246	greg	1.15	}
247
248
249	schorsch	2.30	static int
250	greg	2.39	headline( /* check header line & echo if requested */
251	schorsch	2.30	char *s,
252			void *p
253			)
254	greg	1.15	{
255	greg	2.53	int orig = (int )p;
256	greg	2.51	char fmt[MAXFMTLEN];
257	greg	1.15	double d;
258			COLOR ctmp;
259
260	greg	2.14	if (isheadid(s)) /* header id */
261	gwlarson	2.21	return(0); /* don't echo */
262	greg	2.14	if (formatval(fmt, s)) { /* check format */
263	greg	2.16	if (globmatch(ourfmt, fmt)) {
264			wrongformat = 0;
265			strcpy(ourfmt, fmt);
266			} else
267	greg	2.22	wrongformat = globmatch(PICFMT, fmt) ? 1 : -1;
268	gwlarson	2.21	return(0); /* don't echo */
269	greg	1.17	}
270	greg	2.53	if (orig) { /* undo exposure? */
271			if (isexpos(s)) {
272			d = 1./exposval(s);
273			scalecolor(input[nfiles].coef, d);
274			return(0); /* don't echo */
275			}
276			if (iscolcor(s)) {
277			int i;
278			colcorval(ctmp, s);
279			for (i = 3; i--; )
280			colval(input[nfiles].coef,i) /= colval(ctmp,i);
281			return(0); /* don't echo */
282			}
283			} else if (isexpos(s)) { /* record exposure? */
284	greg	1.17	d = exposval(s);
285			scalecolor(input[nfiles].expos, d);
286	greg	2.53	} else if (iscolcor(s)) {
287	greg	1.15	colcorval(ctmp, s);
288	greg	1.17	multcolor(input[nfiles].expos, ctmp);
289	greg	2.54	}
290			if (isaspect(s))
291	greg	2.17	input[nfiles].pa *= aspectval(s);
292	greg	2.18	else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
293	greg	2.10	gotview++;
294	greg	2.39
295			if (echoheader) { /* echo line */
296			putchar('\t');
297			return(fputs(s, stdout));
298			}
299			return(0);
300	greg	1.16	}
301	greg	1.15
302	greg	1.16
303	schorsch	2.32	static void
304	greg	2.53	checkfile(int orig) /* ready a file */
305	greg	1.16	{
306	greg	2.47	int i;
307	greg	1.16	/* process header */
308	greg	2.10	gotview = 0;
309	greg	2.39	if (echoheader) {
310			fputs(input[nfiles].name, stdout);
311			fputs(":\n", stdout);
312			}
313	greg	2.53	getheader(input[nfiles].fp, headline, &orig);
314	greg	2.22	if (wrongformat < 0) {
315	greg	1.16	eputs(input[nfiles].name);
316	greg	2.22	eputs(": not a Radiance picture\n");
317	greg	1.16	quit(1);
318			}
319	greg	2.22	if (wrongformat > 0) {
320			wputs(input[nfiles].name);
321			wputs(": warning -- incompatible picture format\n");
322			}
323	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
324			input[nfiles].vw.type = 0;
325	greg	2.52	else if (commvp == NULL)
326			commvp = &input[nfiles].vw;
327	greg	2.10	if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
328	greg	1.16	eputs(input[nfiles].name);
329			eputs(": bad picture size\n");
330			quit(1);
331			}
332	greg	1.18	if (xmax == 0 && ymax == 0) {
333	greg	2.10	xmax = scanlen(&input[nfiles].rs);
334			ymax = numscans(&input[nfiles].rs);
335			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
336			numscans(&input[nfiles].rs) != ymax) {
337	greg	1.16	eputs(input[nfiles].name);
338			eputs(": resolution mismatch\n");
339			quit(1);
340			}
341			/* allocate scanlines */
342			for (i = 0; i < WINSIZ; i++)
343	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
344	greg	1.15	}
345
346
347	schorsch	2.32	static double
348			rgb_bright(
349			COLOR clr
350			)
351	greg	2.16	{
352			return(bright(clr));
353			}
354
355
356	schorsch	2.32	static double
357			xyz_bright(
358			COLOR clr
359			)
360	greg	2.16	{
361			return(clr[CIEY]);
362			}
363
364
365			double (*ourbright)() = rgb_bright;
366
367
368	schorsch	2.32	static void
369			init(void) /* perform final setup */
370	greg	1.15	{
371	greg	2.47	int i;
372	greg	1.15	/* define constants */
373	greg	2.19	varset("PI", ':', PI);
374	greg	1.15	varset(vnfiles, ':', (double)nfiles);
375	greg	1.18	varset(vxmax, ':', (double)xmax);
376			varset(vymax, ':', (double)ymax);
377	greg	1.15	/* set functions */
378			for (i = 0; i < 3; i++) {
379	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
380	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
381			}
382	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
383	greg	1.15	funset(vbrtin, 1, '=', l_colin);
384	greg	2.18	funset(vpixaspect, 1, ':', l_pixaspect);
385			for (i = 0; i < 7; i++)
386	greg	2.10	funset(vray[i], 1, '=', l_ray);
387	greg	2.17	funset(vpsize, 1, '=', l_psize);
388	greg	2.16	/* set brightness function */
389	greg	2.18	if (!strcmp(ourfmt, CIEFMT)) {
390			varset(vwhteff, ':', 1.0);
391	greg	2.16	ourbright = xyz_bright;
392	greg	2.18	} else
393			varset(vwhteff, ':', WHTEFFICACY);
394	greg	2.48	/* these may be overridden */
395			varset(vxres, ':', (double)xmax);
396			varset(vyres, ':', (double)ymax);
397	greg	1.1	}
398
399
400	schorsch	2.32	static void
401			combine(void) /* combine pictures */
402	greg	1.1	{
403	greg	1.8	EPNODE coldef[3], brtdef;
404	greg	1.1	COLOR *scanout;
405	greg	1.8	double d;
406	greg	2.47	int i, j;
407	greg	1.1	/* check defined variables */
408	greg	1.4	for (j = 0; j < 3; j++) {
409			if (vardefined(vcolout[j]))
410			coldef[j] = eparse(vcolout[j]);
411			else
412			coldef[j] = NULL;
413			}
414	greg	1.8	if (vardefined(vbrtout))
415			brtdef = eparse(vbrtout);
416			else
417			brtdef = NULL;
418	greg	1.1	/* allocate scanline */
419			scanout = (COLOR )emalloc(xressizeof(COLOR));
420	greg	1.18	/* set input position */
421			yscan = ymax+MIDSCN;
422	greg	1.1	/* combine files */
423			for (ypos = yres-1; ypos >= 0; ypos--) {
424	greg	1.14	advance();
425	greg	1.11	varset(vypos, '=', (double)ypos);
426	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
427	greg	2.42	xscan = (xpos+.5)*xmax/xres;
428	greg	1.11	varset(vxpos, '=', (double)xpos);
429	greg	1.8	eclock++;
430			if (brtdef != NULL) {
431			d = evalue(brtdef);
432			if (d < 0.0)
433			d = 0.0;
434			setcolor(scanout[xpos], d, d, d);
435			} else {
436			for (j = 0; j < 3; j++) {
437			if (coldef[j] != NULL) {
438	greg	1.13	d = evalue(coldef[j]);
439	greg	1.8	} else {
440	greg	1.13	d = 0.0;
441	greg	1.8	for (i = 0; i < nfiles; i++)
442	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
443	greg	1.1	}
444	greg	1.13	if (d < 0.0)
445			d = 0.0;
446			colval(scanout[xpos],j) = d;
447	greg	1.8	}
448	greg	1.1	}
449	greg	1.8	}
450			if (fwritescan(scanout, xres, stdout) < 0) {
451			perror("write error");
452			quit(1);
453			}
454	greg	1.1	}
455	greg	2.22	efree((char *)scanout);
456	greg	1.1	}
457
458
459	schorsch	2.32	static void
460			advance(void) /* read in data for next scanline */
461	greg	1.14	{
462	greg	1.18	int ytarget;
463	greg	2.47	COLOR *st;
464			int i, j;
465	greg	1.14
466	greg	2.42	for (ytarget = (ypos+.5)*ymax/yres; yscan > ytarget; yscan--)
467	greg	1.18	for (i = 0; i < nfiles; i++) {
468			st = input[i].scan[WINSIZ-1];
469			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
470			input[i].scan[j] = input[i].scan[j-1];
471			input[i].scan[0] = st;
472			if (yscan <= MIDSCN) /* hit bottom? */
473			continue;
474	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
475	greg	1.18	eputs(input[i].name);
476			eputs(": read error\n");
477			quit(1);
478			}
479	greg	2.37	for (j = 0; j < xmax; j++) /* adjust color */
480			multcolor(st[j], input[i].coef);
481	greg	1.14	}
482			}
483
484
485	schorsch	2.32	static double
486			l_expos( /* return picture exposure */
487	greg	2.42	char *nam
488	schorsch	2.32	)
489	greg	1.1	{
490	greg	2.42	int fn, n;
491			double d;
492	greg	1.14
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	1.17	if (nam == vbrtexp)
502	greg	2.16	return((*ourbright)(input[fn].expos));
503	greg	1.15	n = 3;
504			while (n--)
505	greg	1.17	if (nam == vcolexp[n])
506			return(colval(input[fn].expos,n));
507			eputs("Bad call to l_expos()!\n");
508	greg	1.15	quit(1);
509	schorsch	2.32	return 1; /* pro forma return */
510	greg	1.15	}
511
512
513	schorsch	2.32	static double
514	greg	2.27	l_pixaspect(char nm) / return pixel aspect ratio */
515	greg	2.18	{
516	greg	2.42	int fn;
517			double d;
518	greg	2.18
519	greg	2.42	d = argument(1);
520			if (d <= -0.5 \|\| d >= nfiles+0.5) {
521			errno = EDOM;
522			return(0.0);
523			}
524			if (d < 0.5)
525			return((double)nfiles);
526			fn = d - 0.5;
527	greg	2.18	return(input[fn].pa);
528			}
529
530
531	schorsch	2.32	static double
532			l_colin( /* return color value for picture */
533	greg	2.47	char *nam
534	schorsch	2.32	)
535	greg	1.15	{
536			int fn;
537	greg	2.47	int n, xoff, yoff;
538	greg	1.15	double d;
539
540	greg	2.42	d = argument(1);
541			if (d <= -0.5 \|\| d >= nfiles+0.5) {
542	greg	1.15	errno = EDOM;
543			return(0.0);
544			}
545	greg	2.42	if (d < 0.5)
546			return((double)nfiles);
547			fn = d - 0.5;
548	greg	1.14	xoff = yoff = 0;
549			n = nargum();
550			if (n >= 2) {
551			d = argument(2);
552			if (d < 0.0) {
553			xoff = d-.5;
554	greg	1.18	if (xscan+xoff < 0)
555			xoff = -xscan;
556	greg	1.14	} else {
557			xoff = d+.5;
558	greg	1.18	if (xscan+xoff >= xmax)
559			xoff = xmax-1-xscan;
560	greg	1.14	}
561			}
562			if (n >= 3) {
563			d = argument(3);
564			if (d < 0.0) {
565			yoff = d-.5;
566			if (yoff+MIDSCN < 0)
567			yoff = -MIDSCN;
568	greg	1.18	if (yscan+yoff < 0)
569			yoff = -yscan;
570	greg	1.14	} else {
571			yoff = d+.5;
572			if (yoff+MIDSCN >= WINSIZ)
573			yoff = WINSIZ-1-MIDSCN;
574	greg	1.18	if (yscan+yoff >= ymax)
575			yoff = ymax-1-yscan;
576	greg	1.14	}
577			}
578	greg	1.15	if (nam == vbrtin)
579	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
580	greg	1.15	n = 3;
581			while (n--)
582			if (nam == vcolin[n])
583	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
584	greg	1.15	eputs("Bad call to l_colin()!\n");
585	greg	2.10	quit(1);
586	schorsch	2.32	return 1; /* pro forma return */
587	greg	2.10	}
588
589
590	schorsch	2.32	static double
591			l_ray( /* return ray origin or direction */
592	greg	2.47	char *nam
593	schorsch	2.32	)
594	greg	2.10	{
595	greg	2.15	static unsigned long ltick[MAXINP];
596	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
597	greg	2.18	static double ldist[MAXINP];
598	schorsch	2.25	RREAL loc[2];
599	greg	2.42	double d;
600	greg	2.10	int fn;
601	greg	2.47	int i;
602	greg	2.10
603	greg	2.42	d = argument(1);
604			if (d <= -0.5 \|\| d >= nfiles+0.5) {
605	greg	2.10	errno = EDOM;
606			return(0.0);
607			}
608	greg	2.42	if (d < 0.5)
609			return((double)nfiles);
610			fn = d - 0.5;
611	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
612	greg	2.10	lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
613			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
614	greg	2.20	ldist[fn] = -1.0;
615	greg	2.10	if (input[fn].vw.type == 0)
616	greg	2.12	errno = EDOM;
617	greg	2.10	else {
618	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
619	greg	2.18	ldist[fn] = viewray(lorg[fn], ldir[fn],
620			&input[fn].vw, loc[0], loc[1]);
621	greg	2.10	}
622	greg	2.18	ltick[fn] = eclock;
623	greg	2.10	}
624	greg	2.18	if (nam == vray[i=6])
625			return(ldist[fn]);
626	greg	2.10	while (i--)
627			if (nam == vray[i])
628			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
629			eputs("Bad call to l_ray()!\n");
630	greg	1.15	quit(1);
631	schorsch	2.32	return 1; /* pro forma return */
632	greg	2.17	}
633
634
635	schorsch	2.32	static double
636	greg	2.27	l_psize(char nm) / compute pixel size in steradians */
637	greg	2.17	{
638			static unsigned long ltick[MAXINP];
639			static double psize[MAXINP];
640	greg	2.18	FVECT dir0, org, dirx, diry;
641	schorsch	2.25	RREAL locx[2], locy[2];
642	greg	2.17	double d;
643			int fn;
644	greg	2.47	int i;
645	greg	2.17
646			d = argument(1);
647	greg	2.42	if (d <= -0.5 \|\| d >= nfiles+0.5) {
648	greg	2.17	errno = EDOM;
649			return(0.0);
650			}
651	greg	2.42	if (d < 0.5)
652			return((double)nfiles);
653			fn = d - 0.5;
654	greg	2.22	if (ltick[fn] != eclock) { /* need to compute? */
655	greg	2.18	psize[fn] = 0.0;
656			if (input[fn].vw.type == 0)
657	greg	2.17	errno = EDOM;
658	greg	2.18	else if (input[fn].vw.type != VT_PAR &&
659	greg	2.36	funvalue(vray[6], 1, &d) >= -FTINY) {
660	greg	2.18	for (i = 0; i < 3; i++)
661			dir0[i] = funvalue(vray[3+i], 1, &d);
662			pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan);
663			pix2loc(locy, &input[fn].rs, xscan, ymax-yscan);
664			if (viewray(org, dirx, &input[fn].vw,
665	greg	2.35	locx[0], locx[1]) >= -FTINY &&
666	greg	2.18	viewray(org, diry, &input[fn].vw,
667	greg	2.35	locy[0], locy[1]) >= -FTINY) {
668	greg	2.17	/* approximate solid angle */
669	greg	2.18	for (i = 0; i < 3; i++) {
670			dirx[i] -= dir0[i];
671			diry[i] -= dir0[i];
672			}
673			fcross(dir0, dirx, diry);
674	greg	2.35	psize[fn] = VLEN(dir0);
675	greg	2.17	}
676			}
677	greg	2.18	ltick[fn] = eclock;
678			}
679	greg	2.17	return(psize[fn]);
680	greg	1.1	}
681
682
683	schorsch	2.29	extern void
684	greg	2.55	wputs(const char *msg)
685	greg	1.1	{
686			if (!nowarn)
687			eputs(msg);
688			}
689
690
691	schorsch	2.29	extern void
692	greg	2.55	eputs(const char *msg)
693	greg	1.1	{
694			fputs(msg, stderr);
695			}
696
697
698	schorsch	2.29	extern void
699			quit(int code) /* exit gracefully */
700	greg	2.4	{
701	greg	2.47	int i;
702	greg	2.5	/* close input files */
703			for (i = 0; i < nfiles; i++)
704	greg	2.6	if (input[i].name == Command)
705			pclose(input[i].fp);
706			else
707			fclose(input[i].fp);
708	greg	1.1	exit(code);
709			}