src/px/pcomb.c

/* Copyright (c) 1992 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

#include "standard.h"

#include "color.h"

#include "resolu.h"

#include "calcomp.h"

#include "view.h"

#define MAXINP          32              /* maximum number of input files */
#define WINSIZ          17              /* 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 */
        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    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    vray[6][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz"};

char    vnfiles[] = "nfiles";
char    vxmax[] = "xmax";
char    vymax[] = "ymax";
char    vxres[] = "xres";
char    vyres[] = "yres";
char    vxpos[] = "x";
char    vypos[] = "y";

int     nowarn = 0;                     /* no warning messages? */

int     xmax = 0, ymax = 0;             /* input resolution */

int     xscan, yscan;                   /* input position */

int     xres, yres;                     /* output resolution */

int     xpos, ypos;                     /* output position */

char    *progname;                      /* global argv[0] */

int     wrongformat = 0;
int     gotview;

FILE    *popen();

extern char     *emalloc();


main(argc, argv)
int     argc;
char    *argv[];
{
        int     original;
        double  f;
        int     a, i;
#ifdef MSDOS
        extern int  _fmode;
        _fmode = O_BINARY;
        setmode(fileno(stdin), O_BINARY);
        setmode(fileno(stdout), O_BINARY);
#endif
        progname = argv[0];
                                                /* scan options */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                        case 'y':
                                a++;
                                continue;
                        case 'w':
                                nowarn = !nowarn;
                                continue;
                        case 'f':
                        case 'e':
                                a++;
                                continue;
                        }
                break;
        }
        newheader("RADIANCE", stdout);  /* start header */
                                        /* 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);
                copystruct(&input[nfiles].vw, &stdview);
        }
        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 = "<stdin>";
                                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);
                }
                nfiles++;
                original = 0;
        }
        init();                         /* set constants */
                                        /* go back and get expressions */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                                varset(vxres, ':', eval(argv[++a]));
                                continue;
                        case 'y':
                                varset(vyres, ':', eval(argv[++a]));
                                continue;
                        case 'w':
                                continue;
                        case 'f':
                                fcompile(argv[++a]);
                                continue;
                        case 'e':
                                scompile(argv[++a], NULL, 0);
                                continue;
                        }
                break;
        }
                                                /* set/get output resolution */
        if (!vardefined(vxres))
                varset(vxres, ':', (double)xmax);
        if (!vardefined(vyres))
                varset(vyres, ':', (double)ymax);
        xres = varvalue(vxres) + .5;
        yres = varvalue(vyres) + .5;
        if (xres <= 0 || yres <= 0) {
                eputs(argv[0]);
                eputs(": illegal output resolution\n");
                quit(1);
        }
                                                /* complete header */
        printargs(argc, argv, stdout);
        if (strcmp(ourfmt, PICFMT))
                fputformat(ourfmt, stdout);     /* print format if known */
        putchar('\n');
        fprtresolu(xres, yres, stdout);
                                                /* combine pictures */
        combine();
        quit(0);
usage:
        eputs("Usage: ");
        eputs(argv[0]);
        eputs(
" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
        quit(1);
}


tputs(s)                        /* put out string preceded by a tab */
char    *s;
{
        char    fmt[32];
        double  d;
        COLOR   ctmp;

        if (isheadid(s))                        /* header id */
                return;         /* don't echo */
        if (formatval(fmt, s)) {                /* check format */
                if (globmatch(ourfmt, fmt)) {
                        wrongformat = 0;
                        strcpy(ourfmt, fmt);
                } else
                        wrongformat = 1;
                return;         /* 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 (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
                gotview++;
                                                /* echo line */
        putchar('\t');
        fputs(s, stdout);
}


checkfile()                     /* ready a file */
{
        register int    i;
                                        /* process header */
        gotview = 0;
        fputs(input[nfiles].name, stdout);
        fputs(":\n", stdout);
        getheader(input[nfiles].fp, tputs, NULL);
        if (wrongformat) {
                eputs(input[nfiles].name);
                eputs(": not in Radiance picture format\n");
                quit(1);
        }
        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));
}


double
rgb_bright(clr)
COLOR  clr;
{
        return(bright(clr));
}


double
xyz_bright(clr)
COLOR  clr;
{
        return(clr[CIEY]);
}


double  (*ourbright)() = rgb_bright;


init()                                  /* perform final setup */
{
        double  l_colin(), l_expos(), l_ray();
        register int    i;
                                                /* define constants */
        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);
        for (i = 0; i < 6; i++)
                funset(vray[i], 1, '=', l_ray);
                                                /* set brightness function */
        if (!strcmp(ourfmt, CIEFMT))
                ourbright = xyz_bright;
}


combine()                       /* combine pictures */
{
        EPNODE  *coldef[3], *brtdef;
        COLOR   *scanout;
        double  d;
        register int    i, j;
                                                /* check defined variables */
        for (j = 0; j < 3; j++) {
                if (vardefined(vcolout[j]))
                        coldef[j] = eparse(vcolout[j]);
                else
                        coldef[j] = NULL;
        }
        if (vardefined(vbrtout))
                brtdef = eparse(vbrtout);
        else
                brtdef = NULL;
                                                /* allocate scanline */
        scanout = (COLOR *)emalloc(xres*sizeof(COLOR));
                                                /* set input position */
        yscan = ymax+MIDSCN;
                                                /* combine files */
        for (ypos = yres-1; ypos >= 0; ypos--) {
            advance();
            varset(vypos, '=', (double)ypos);
            for (xpos = 0; xpos < xres; xpos++) {
                xscan = (long)xpos*xmax/xres;
                varset(vxpos, '=', (double)xpos);
                eclock++;
                if (brtdef != NULL) {
                    d = evalue(brtdef);
                    if (d < 0.0)
                        d = 0.0;
                    setcolor(scanout[xpos], d, d, d);
                } else {
                    for (j = 0; j < 3; j++) {
                        if (coldef[j] != NULL) {
                                d = evalue(coldef[j]);
                        } else {
                            d = 0.0;
                            for (i = 0; i < nfiles; i++)
                                d += colval(input[i].scan[MIDSCN][xscan],j);
                        }
                        if (d < 0.0)
                            d = 0.0;
                        colval(scanout[xpos],j) = d;
                    }
                }
            }
            if (fwritescan(scanout, xres, stdout) < 0) {
                    perror("write error");
                    quit(1);
            }
        }
        efree(scanout);
}


advance()                       /* read in data for next scanline */
{
        int     ytarget;
        register COLOR  *st;
        register int    i, j;

        for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
                for (i = 0; i < nfiles; i++) {
                        st = input[i].scan[WINSIZ-1];
                        for (j = WINSIZ-1; j > 0; j--)  /* rotate window */
                                input[i].scan[j] = input[i].scan[j-1];
                        input[i].scan[0] = st;
                        if (yscan <= MIDSCN)            /* hit bottom? */
                                continue;
                        if (freadscan(st, xmax, input[i].fp) < 0) {  /* read */
                                eputs(input[i].name);
                                eputs(": read error\n");
                                quit(1);
                        }
                        if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 ||
                                fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 ||
                                fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
                                for (j = 0; j < xmax; j++)  /* adjust color */
                                        multcolor(st[j], input[i].coef);
                }
}


double
l_expos(nam)                    /* return picture exposure */
register char   *nam;
{
        register int    fn, n;

        fn = argument(1) - .5;
        if (fn < 0 || fn >= nfiles)
                return(1.0);
        if (nam == vbrtexp)
                return((*ourbright)(input[fn].expos));
        n = 3;
        while (n--)
                if (nam == vcolexp[n])
                        return(colval(input[fn].expos,n));
        eputs("Bad call to l_expos()!\n");
        quit(1);
}


double
l_colin(nam)                    /* return color value for picture */
register char   *nam;
{
        int     fn;
        register int    n, xoff, yoff;
        double  d;

        d = argument(1);
        if (d > -.5 && d < .5)
                return((double)nfiles);
        fn = d - .5;
        if (fn < 0 || fn >= nfiles) {
                errno = EDOM;
                return(0.0);
        }
        xoff = yoff = 0;
        n = nargum();
        if (n >= 2) {
                d = argument(2);
                if (d < 0.0) {
                        xoff = d-.5;
                        if (xscan+xoff < 0)
                                xoff = -xscan;
                } else {
                        xoff = d+.5;
                        if (xscan+xoff >= xmax)
                                xoff = xmax-1-xscan;
                }
        }
        if (n >= 3) {
                d = argument(3);
                if (d < 0.0) {
                        yoff = d-.5;
                        if (yoff+MIDSCN < 0)
                                yoff = -MIDSCN;
                        if (yscan+yoff < 0)
                                yoff = -yscan;
                } else {
                        yoff = d+.5;
                        if (yoff+MIDSCN >= WINSIZ)
                                yoff = WINSIZ-1-MIDSCN;
                        if (yscan+yoff >= ymax)
                                yoff = ymax-1-yscan;
                }
        }
        if (nam == vbrtin)
                return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
        n = 3;
        while (n--)
            if (nam == vcolin[n])
                return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
        eputs("Bad call to l_colin()!\n");
        quit(1);
}


double
l_ray(nam)              /* return ray origin or direction */
register char   *nam;
{
        static unsigned long    ltick[MAXINP];
        static FVECT    lorg[MAXINP], ldir[MAXINP];
        FLOAT   loc[2];
        double  d;
        int     fn;
        register int    i;

        d = argument(1);
        if (d > -.5 && d < .5)
                return((double)nfiles);
        fn = d - .5;
        if (fn < 0 || fn >= nfiles) {
                errno = EDOM;
                return(0.0);
        }
        if (ltick[fn] < eclock) {               /* need to compute? */
                lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
                ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
                if (input[fn].vw.type == 0)
                        errno = EDOM;
                else {
                        pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
                        if (viewray(lorg[fn], ldir[fn],
                                        &input[fn].vw, loc[0], loc[1]) < 0)
                                errno = ERANGE;
                }
                ltick[fn] = eclock;
        }
        i = 6;
        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);
}


wputs(msg)
char    *msg;
{
        if (!nowarn)
                eputs(msg);
}


eputs(msg)
char    *msg;
{
        fputs(msg, stderr);
}


quit(code)              /* exit gracefully */
int  code;
{
        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:	2.16
Committed:	Mon Oct 16 12:04:33 1995 UTC (28 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.15:	+33 -4 lines
Log Message:	added compatibility with Radiance XYZE picture format
#	User	Rev	Content
1	greg	2.6	/* Copyright (c) 1992 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Combine picture files according to calcomp functions.
9			*
10			* 1/4/89
11			*/
12
13	greg	2.10	#include "standard.h"
14	greg	1.1
15			#include "color.h"
16
17	greg	2.8	#include "resolu.h"
18	greg	1.23
19	greg	1.1	#include "calcomp.h"
20
21	greg	2.10	#include "view.h"
22
23	greg	1.6	#define MAXINP 32 /* maximum number of input files */
24	greg	2.13	#define WINSIZ 17 /* scanline window size */
25			#define MIDSCN ((WINSIZ-1)/2+1)
26	greg	1.1
27			struct {
28	greg	1.19	char name; / file or command name */
29	greg	1.1	FILE fp; / stream pointer */
30	greg	2.10	VIEW vw; /* view for picture */
31			RESOLU rs; /* image resolution and orientation */
32	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
33	greg	1.3	COLOR coef; /* coefficient */
34	greg	1.17	COLOR expos; /* recorded exposure */
35	greg	1.1	} input[MAXINP]; /* input pictures */
36
37			int nfiles; /* number of input files */
38
39	greg	2.16	char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */
40
41	greg	2.6	char Command[] = "<Command>";
42	greg	1.21	char vcolin[3][4] = {"ri", "gi", "bi"};
43			char vcolout[3][4] = {"ro", "go", "bo"};
44	greg	1.15	char vbrtin[] = "li";
45			char vbrtout[] = "lo";
46	greg	1.21	char vcolexp[3][4] = {"re", "ge", "be"};
47	greg	1.17	char vbrtexp[] = "le";
48	greg	1.1
49	greg	2.10	char vray[6][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz"};
50
51	greg	1.18	char vnfiles[] = "nfiles";
52			char vxmax[] = "xmax";
53			char vymax[] = "ymax";
54			char vxres[] = "xres";
55			char vyres[] = "yres";
56			char vxpos[] = "x";
57			char vypos[] = "y";
58	greg	1.1
59			int nowarn = 0; /* no warning messages? */
60
61	greg	1.18	int xmax = 0, ymax = 0; /* input resolution */
62	greg	1.9
63	greg	1.18	int xscan, yscan; /* input position */
64	greg	1.1
65	greg	1.18	int xres, yres; /* output resolution */
66	greg	1.1
67	greg	1.18	int xpos, ypos; /* output position */
68
69	greg	2.10	char progname; / global argv[0] */
70
71	greg	1.10	int wrongformat = 0;
72	greg	2.10	int gotview;
73	greg	1.1
74	greg	1.19	FILE *popen();
75	greg	1.10
76	greg	2.7	extern char *emalloc();
77	greg	1.19
78	greg	2.7
79	greg	1.1	main(argc, argv)
80			int argc;
81			char *argv[];
82			{
83	greg	1.18	int original;
84	greg	1.3	double f;
85	greg	1.14	int a, i;
86	greg	2.7	#ifdef MSDOS
87			extern int _fmode;
88			_fmode = O_BINARY;
89			setmode(fileno(stdin), O_BINARY);
90			setmode(fileno(stdout), O_BINARY);
91			#endif
92	greg	2.10	progname = argv[0];
93	greg	1.15	/* scan options */
94			for (a = 1; a < argc; a++) {
95	greg	1.1	if (argv[a][0] == '-')
96			switch (argv[a][1]) {
97			case 'x':
98			case 'y':
99	greg	1.18	a++;
100	greg	1.15	continue;
101	greg	1.1	case 'w':
102			nowarn = !nowarn;
103	greg	1.15	continue;
104	greg	1.1	case 'f':
105			case 'e':
106	greg	1.16	a++;
107	greg	1.15	continue;
108	greg	1.1	}
109	greg	1.15	break;
110			}
111	greg	2.14	newheader("RADIANCE", stdout); /* start header */
112	greg	1.15	/* process files */
113	greg	1.17	for (nfiles = 0; nfiles < MAXINP; nfiles++) {
114	greg	1.3	setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
115	greg	1.17	setcolor(input[nfiles].expos, 1.0, 1.0, 1.0);
116	greg	2.10	copystruct(&input[nfiles].vw, &stdview);
117	greg	1.17	}
118	greg	1.1	nfiles = 0;
119	greg	1.18	original = 0;
120	greg	1.1	for ( ; a < argc; a++) {
121			if (nfiles >= MAXINP) {
122			eputs(argv[0]);
123			eputs(": too many picture files\n");
124			quit(1);
125			}
126	greg	1.3	if (argv[a][0] == '-')
127			switch (argv[a][1]) {
128			case '\0':
129			input[nfiles].name = "<stdin>";
130			input[nfiles].fp = stdin;
131			break;
132	greg	1.17	case 'o':
133			original++;
134	greg	1.22	continue;
135	greg	1.3	case 's':
136			f = atof(argv[++a]);
137			scalecolor(input[nfiles].coef, f);
138			continue;
139			case 'c':
140			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
141			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
142			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
143			continue;
144			default:
145			goto usage;
146			}
147			else {
148	greg	2.2	if (argv[a][0] == '!') {
149	greg	2.6	input[nfiles].name = Command;
150	greg	2.2	input[nfiles].fp = popen(argv[a]+1, "r");
151			} else {
152			input[nfiles].name = argv[a];
153			input[nfiles].fp = fopen(argv[a], "r");
154			}
155	greg	1.1	if (input[nfiles].fp == NULL) {
156	greg	1.6	perror(argv[a]);
157	greg	1.1	quit(1);
158			}
159			}
160	greg	1.16	checkfile();
161	greg	1.18	if (original) {
162			colval(input[nfiles].coef,RED) /=
163			colval(input[nfiles].expos,RED);
164			colval(input[nfiles].coef,GRN) /=
165			colval(input[nfiles].expos,GRN);
166			colval(input[nfiles].coef,BLU) /=
167			colval(input[nfiles].expos,BLU);
168			}
169			nfiles++;
170	greg	1.17	original = 0;
171	greg	1.15	}
172	greg	1.18	init(); /* set constants */
173	greg	1.15	/* go back and get expressions */
174			for (a = 1; a < argc; a++) {
175			if (argv[a][0] == '-')
176			switch (argv[a][1]) {
177			case 'x':
178	greg	1.21	varset(vxres, ':', eval(argv[++a]));
179	greg	1.18	continue;
180	greg	1.15	case 'y':
181	greg	1.21	varset(vyres, ':', eval(argv[++a]));
182	greg	1.16	continue;
183	greg	1.15	case 'w':
184			continue;
185			case 'f':
186			fcompile(argv[++a]);
187			continue;
188			case 'e':
189			scompile(argv[++a], NULL, 0);
190			continue;
191			}
192			break;
193			}
194	greg	1.18	/* set/get output resolution */
195			if (!vardefined(vxres))
196			varset(vxres, ':', (double)xmax);
197			if (!vardefined(vyres))
198			varset(vyres, ':', (double)ymax);
199			xres = varvalue(vxres) + .5;
200			yres = varvalue(vyres) + .5;
201			if (xres <= 0 \|\| yres <= 0) {
202			eputs(argv[0]);
203			eputs(": illegal output resolution\n");
204			quit(1);
205			}
206	greg	1.15	/* complete header */
207			printargs(argc, argv, stdout);
208	greg	2.16	if (strcmp(ourfmt, PICFMT))
209			fputformat(ourfmt, stdout); /* print format if known */
210	greg	1.15	putchar('\n');
211	greg	1.23	fprtresolu(xres, yres, stdout);
212	greg	1.15	/* combine pictures */
213			combine();
214			quit(0);
215			usage:
216			eputs("Usage: ");
217			eputs(argv[0]);
218			eputs(
219	greg	2.9	" [-w][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] pic ..]\n");
220	greg	1.15	quit(1);
221			}
222
223
224			tputs(s) /* put out string preceded by a tab */
225			char *s;
226			{
227			char fmt[32];
228			double d;
229			COLOR ctmp;
230
231	greg	2.14	if (isheadid(s)) /* header id */
232			return; /* don't echo */
233			if (formatval(fmt, s)) { /* check format */
234	greg	2.16	if (globmatch(ourfmt, fmt)) {
235			wrongformat = 0;
236			strcpy(ourfmt, fmt);
237			} else
238			wrongformat = 1;
239	greg	1.17	return; /* don't echo */
240			}
241			if (isexpos(s)) { /* exposure */
242			d = exposval(s);
243			scalecolor(input[nfiles].expos, d);
244			} else if (iscolcor(s)) { /* color correction */
245	greg	1.15	colcorval(ctmp, s);
246	greg	1.17	multcolor(input[nfiles].expos, ctmp);
247	greg	2.10	} else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0)
248			gotview++;
249	greg	1.17	/* echo line */
250			putchar('\t');
251			fputs(s, stdout);
252	greg	1.16	}
253	greg	1.15
254	greg	1.16
255			checkfile() /* ready a file */
256			{
257			register int i;
258			/* process header */
259	greg	2.10	gotview = 0;
260	greg	1.16	fputs(input[nfiles].name, stdout);
261			fputs(":\n", stdout);
262			getheader(input[nfiles].fp, tputs, NULL);
263			if (wrongformat) {
264			eputs(input[nfiles].name);
265			eputs(": not in Radiance picture format\n");
266			quit(1);
267			}
268	greg	2.10	if (!gotview \|\| setview(&input[nfiles].vw) != NULL)
269			input[nfiles].vw.type = 0;
270			if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
271	greg	1.16	eputs(input[nfiles].name);
272			eputs(": bad picture size\n");
273			quit(1);
274			}
275	greg	1.18	if (xmax == 0 && ymax == 0) {
276	greg	2.10	xmax = scanlen(&input[nfiles].rs);
277			ymax = numscans(&input[nfiles].rs);
278			} else if (scanlen(&input[nfiles].rs) != xmax \|\|
279			numscans(&input[nfiles].rs) != ymax) {
280	greg	1.16	eputs(input[nfiles].name);
281			eputs(": resolution mismatch\n");
282			quit(1);
283			}
284			/* allocate scanlines */
285			for (i = 0; i < WINSIZ; i++)
286	greg	1.18	input[nfiles].scan[i] = (COLOR )emalloc(xmaxsizeof(COLOR));
287	greg	1.15	}
288
289
290	greg	2.16	double
291			rgb_bright(clr)
292			COLOR clr;
293			{
294			return(bright(clr));
295			}
296
297
298			double
299			xyz_bright(clr)
300			COLOR clr;
301			{
302			return(clr[CIEY]);
303			}
304
305
306			double (*ourbright)() = rgb_bright;
307
308
309	greg	1.18	init() /* perform final setup */
310	greg	1.15	{
311	greg	2.10	double l_colin(), l_expos(), l_ray();
312	greg	1.16	register int i;
313	greg	1.15	/* define constants */
314			varset(vnfiles, ':', (double)nfiles);
315	greg	1.18	varset(vxmax, ':', (double)xmax);
316			varset(vymax, ':', (double)ymax);
317	greg	1.15	/* set functions */
318			for (i = 0; i < 3; i++) {
319	greg	1.17	funset(vcolexp[i], 1, ':', l_expos);
320	greg	1.15	funset(vcolin[i], 1, '=', l_colin);
321			}
322	greg	1.17	funset(vbrtexp, 1, ':', l_expos);
323	greg	1.15	funset(vbrtin, 1, '=', l_colin);
324	greg	2.10	for (i = 0; i < 6; i++)
325			funset(vray[i], 1, '=', l_ray);
326	greg	2.16	/* set brightness function */
327			if (!strcmp(ourfmt, CIEFMT))
328			ourbright = xyz_bright;
329	greg	1.1	}
330
331
332			combine() /* combine pictures */
333			{
334	greg	1.8	EPNODE coldef[3], brtdef;
335	greg	1.1	COLOR *scanout;
336	greg	1.8	double d;
337	greg	1.1	register int i, j;
338			/* check defined variables */
339	greg	1.4	for (j = 0; j < 3; j++) {
340			if (vardefined(vcolout[j]))
341			coldef[j] = eparse(vcolout[j]);
342			else
343			coldef[j] = NULL;
344			}
345	greg	1.8	if (vardefined(vbrtout))
346			brtdef = eparse(vbrtout);
347			else
348			brtdef = NULL;
349	greg	1.1	/* allocate scanline */
350			scanout = (COLOR )emalloc(xressizeof(COLOR));
351	greg	1.18	/* set input position */
352			yscan = ymax+MIDSCN;
353	greg	1.1	/* combine files */
354			for (ypos = yres-1; ypos >= 0; ypos--) {
355	greg	1.14	advance();
356	greg	1.11	varset(vypos, '=', (double)ypos);
357	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
358	greg	1.18	xscan = (long)xpos*xmax/xres;
359	greg	1.11	varset(vxpos, '=', (double)xpos);
360	greg	1.8	eclock++;
361			if (brtdef != NULL) {
362			d = evalue(brtdef);
363			if (d < 0.0)
364			d = 0.0;
365			setcolor(scanout[xpos], d, d, d);
366			} else {
367			for (j = 0; j < 3; j++) {
368			if (coldef[j] != NULL) {
369	greg	1.13	d = evalue(coldef[j]);
370	greg	1.8	} else {
371	greg	1.13	d = 0.0;
372	greg	1.8	for (i = 0; i < nfiles; i++)
373	greg	1.18	d += colval(input[i].scan[MIDSCN][xscan],j);
374	greg	1.1	}
375	greg	1.13	if (d < 0.0)
376			d = 0.0;
377			colval(scanout[xpos],j) = d;
378	greg	1.8	}
379	greg	1.1	}
380	greg	1.8	}
381			if (fwritescan(scanout, xres, stdout) < 0) {
382			perror("write error");
383			quit(1);
384			}
385	greg	1.1	}
386			efree(scanout);
387			}
388
389
390	greg	1.18	advance() /* read in data for next scanline */
391	greg	1.14	{
392	greg	1.18	int ytarget;
393	greg	1.14	register COLOR *st;
394			register int i, j;
395
396	greg	1.18	for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--)
397			for (i = 0; i < nfiles; i++) {
398			st = input[i].scan[WINSIZ-1];
399			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
400			input[i].scan[j] = input[i].scan[j-1];
401			input[i].scan[0] = st;
402			if (yscan <= MIDSCN) /* hit bottom? */
403			continue;
404	greg	2.4	if (freadscan(st, xmax, input[i].fp) < 0) { /* read */
405	greg	1.18	eputs(input[i].name);
406			eputs(": read error\n");
407			quit(1);
408			}
409	greg	2.4	if (fabs(colval(input[i].coef,RED)-1.0) > 1e-3 \|\|
410			fabs(colval(input[i].coef,GRN)-1.0) > 1e-3 \|\|
411			fabs(colval(input[i].coef,BLU)-1.0) > 1e-3)
412			for (j = 0; j < xmax; j++) /* adjust color */
413			multcolor(st[j], input[i].coef);
414	greg	1.14	}
415			}
416
417
418	greg	1.1	double
419	greg	1.17	l_expos(nam) /* return picture exposure */
420	greg	1.15	register char *nam;
421	greg	1.1	{
422	greg	1.15	register int fn, n;
423	greg	1.14
424	greg	1.18	fn = argument(1) - .5;
425			if (fn < 0 \|\| fn >= nfiles)
426			return(1.0);
427	greg	1.17	if (nam == vbrtexp)
428	greg	2.16	return((*ourbright)(input[fn].expos));
429	greg	1.15	n = 3;
430			while (n--)
431	greg	1.17	if (nam == vcolexp[n])
432			return(colval(input[fn].expos,n));
433			eputs("Bad call to l_expos()!\n");
434	greg	1.15	quit(1);
435			}
436
437
438			double
439			l_colin(nam) /* return color value for picture */
440			register char *nam;
441			{
442			int fn;
443			register int n, xoff, yoff;
444			double d;
445
446	greg	1.16	d = argument(1);
447			if (d > -.5 && d < .5)
448			return((double)nfiles);
449			fn = d - .5;
450			if (fn < 0 \|\| fn >= nfiles) {
451	greg	1.15	errno = EDOM;
452			return(0.0);
453			}
454	greg	1.14	xoff = yoff = 0;
455			n = nargum();
456			if (n >= 2) {
457			d = argument(2);
458			if (d < 0.0) {
459			xoff = d-.5;
460	greg	1.18	if (xscan+xoff < 0)
461			xoff = -xscan;
462	greg	1.14	} else {
463			xoff = d+.5;
464	greg	1.18	if (xscan+xoff >= xmax)
465			xoff = xmax-1-xscan;
466	greg	1.14	}
467			}
468			if (n >= 3) {
469			d = argument(3);
470			if (d < 0.0) {
471			yoff = d-.5;
472			if (yoff+MIDSCN < 0)
473			yoff = -MIDSCN;
474	greg	1.18	if (yscan+yoff < 0)
475			yoff = -yscan;
476	greg	1.14	} else {
477			yoff = d+.5;
478			if (yoff+MIDSCN >= WINSIZ)
479			yoff = WINSIZ-1-MIDSCN;
480	greg	1.18	if (yscan+yoff >= ymax)
481			yoff = ymax-1-yscan;
482	greg	1.14	}
483			}
484	greg	1.15	if (nam == vbrtin)
485	greg	2.16	return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff]));
486	greg	1.15	n = 3;
487			while (n--)
488			if (nam == vcolin[n])
489	greg	1.18	return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n));
490	greg	1.15	eputs("Bad call to l_colin()!\n");
491	greg	2.10	quit(1);
492			}
493
494
495			double
496			l_ray(nam) /* return ray origin or direction */
497			register char *nam;
498			{
499	greg	2.15	static unsigned long ltick[MAXINP];
500	greg	2.10	static FVECT lorg[MAXINP], ldir[MAXINP];
501			FLOAT loc[2];
502			double d;
503			int fn;
504			register int i;
505
506			d = argument(1);
507			if (d > -.5 && d < .5)
508			return((double)nfiles);
509			fn = d - .5;
510			if (fn < 0 \|\| fn >= nfiles) {
511			errno = EDOM;
512			return(0.0);
513			}
514			if (ltick[fn] < eclock) { /* need to compute? */
515			lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0;
516			ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0;
517			if (input[fn].vw.type == 0)
518	greg	2.12	errno = EDOM;
519	greg	2.10	else {
520	greg	2.11	pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan);
521	greg	2.10	if (viewray(lorg[fn], ldir[fn],
522			&input[fn].vw, loc[0], loc[1]) < 0)
523			errno = ERANGE;
524			}
525			ltick[fn] = eclock;
526			}
527			i = 6;
528			while (i--)
529			if (nam == vray[i])
530			return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]);
531			eputs("Bad call to l_ray()!\n");
532	greg	1.15	quit(1);
533	greg	1.1	}
534
535
536			wputs(msg)
537			char *msg;
538			{
539			if (!nowarn)
540			eputs(msg);
541			}
542
543
544			eputs(msg)
545			char *msg;
546			{
547			fputs(msg, stderr);
548			}
549
550
551	greg	2.4	quit(code) /* exit gracefully */
552			int code;
553			{
554	greg	2.5	register int i;
555			/* close input files */
556			for (i = 0; i < nfiles; i++)
557	greg	2.6	if (input[i].name == Command)
558			pclose(input[i].fp);
559			else
560			fclose(input[i].fp);
561	greg	1.1	exit(code);
562			}