src/px/pcomb.c

/* Copyright (c) 1991 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 <stdio.h>

#include <errno.h>

#include "color.h"

#include "calcomp.h"

#define MAXINP          32              /* maximum number of input files */
#define WINSIZ          9               /* scanline window size */
#define MIDSCN          4               /* current scan position */

#define BRT             (-1)            /* special index for brightness */

struct {
        char    *name;          /* file name */
        FILE    *fp;            /* stream pointer */
        COLOR   *scan[WINSIZ];  /* input scanline window */
        COLOR   coef;           /* coefficient */
}       input[MAXINP];                  /* input pictures */

int     nfiles;                         /* number of input files */

char    *vcolin[3] = {"ri", "gi", "bi"};
char    *vcolout[3] = {"ro", "go", "bo"};
char    vbrtin[] = "li";
char    vbrtout[] = "lo";
char    *vcolcoef[3] = {"rc", "gc", "bc"};
char    vbrtcoef[] = "lc";

#define vnfiles         "nfiles"
#define vxres           "xres"
#define vyres           "yres"
#define vxpos           "x"
#define vypos           "y"

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

int     original = 0;                   /* origninal values? */

int     xres=0, yres=0;                 /* picture resolution */

int     xpos, ypos;                     /* picture position */

int     wrongformat = 0;


main(argc, argv)
int     argc;
char    *argv[];
{
        double  f;
        int     a, i;
                                                /* scan options */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                                xres = atoi(argv[++a]);
                                continue;
                        case 'y':
                                yres = atoi(argv[++a]);
                                continue;
                        case 'w':
                                nowarn = !nowarn;
                                continue;
                        case 'o':
                                original = !original;
                                continue;
                        case 'f':
                        case 'e':
                                a++;
                                continue;
                        }
                break;
        }
                                        /* process files */
        for (nfiles = 0; nfiles < MAXINP; nfiles++)
                setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
        nfiles = 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 '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 {
                        input[nfiles].name = argv[a];
                        input[nfiles].fp = fopen(argv[a], "r");
                        if (input[nfiles].fp == NULL) {
                                perror(argv[a]);
                                quit(1);
                        }
                }
                checkfile();
                nfiles++;
        }
        init();                         /* set constant expressions */
                                        /* go back and get expressions */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                        case 'y':
                                a++;
                                continue;
                        case 'w':
                        case 'o':
                                continue;
                        case 'f':
                                fcompile(argv[++a]);
                                continue;
                        case 'e':
                                scompile(argv[++a], NULL, 0);
                                continue;
                        }
                break;
        }
                                                /* complete header */
        printargs(argc, argv, stdout);
        fputformat(COLRFMT, stdout);
        putchar('\n');
        fputresolu(YMAJOR|YDECR, 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] [ [-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 (isformat(s)) {                      /* check format */
                formatval(fmt, s);
                wrongformat = strcmp(fmt, COLRFMT);
        } else if (original && isexpos(s)) {    /* exposure */
                d = 1.0/exposval(s);
                scalecolor(input[nfiles].coef, d);
        } else if (original && iscolcor(s)) {   /* color correction */
                colcorval(ctmp, s);
                colval(input[nfiles].coef,RED) /= colval(ctmp,RED);
                colval(input[nfiles].coef,GRN) /= colval(ctmp,GRN);
                colval(input[nfiles].coef,BLU) /= colval(ctmp,BLU);
        } else {                                /* echo unaffected line */
                putchar('\t');
                fputs(s, stdout);
        }
}


checkfile()                     /* ready a file */
{
        register int    i;
                                        /* process header */
        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 (fgetresolu(&xpos, &ypos, input[nfiles].fp) != (YMAJOR|YDECR)) {
                eputs(input[nfiles].name);
                eputs(": bad picture size\n");
                quit(1);
        }
        if (xres == 0 && yres == 0) {
                xres = xpos;
                yres = ypos;
        } else if (xpos != xres || ypos != yres) {
                eputs(input[nfiles].name);
                eputs(": resolution mismatch\n");
                quit(1);
        }
                                        /* allocate scanlines */
        for (i = 0; i < WINSIZ; i++)
                input[nfiles].scan[i] = (COLOR *)emalloc(xres*sizeof(COLOR));
}


init()                          /* perform final setup */
{
        double  l_colin(), l_coef();
        register int    i;
                                                /* prime input */
        for (ypos = yres+(MIDSCN-1); ypos >= yres; ypos--)
                advance();
                                                /* define constants */
        varset(vnfiles, ':', (double)nfiles);
        varset(vxres, ':', (double)xres);
        varset(vyres, ':', (double)yres);
                                                /* set functions */
        for (i = 0; i < 3; i++) {
                funset(vcolcoef[i], 1, ':', l_coef);
                funset(vcolin[i], 1, '=', l_colin);
        }
        funset(vbrtcoef, 1, ':', l_coef);
        funset(vbrtin, 1, '=', l_colin);
}


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));
                                                /* combine files */
        for (ypos = yres-1; ypos >= 0; ypos--) {
            advance();
            varset(vypos, '=', (double)ypos);
            for (xpos = 0; xpos < xres; xpos++) {
                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][xpos],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 next scanline */
{
        register COLOR  *st;
        register int    i, j;

        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 (ypos < MIDSCN)              /* hit bottom */
                        continue;
                if (freadscan(st, xres, input[i].fp) < 0) {
                        eputs(input[i].name);
                        eputs(": read error\n");
                        quit(1);
                }
                for (j = 0; j < xres; j++)      /* adjust color */
                        multcolor(st[j], input[i].coef);
        }
}


double
l_coef(nam)                     /* return picture coefficients */
register char   *nam;
{
        register int    fn, n;
        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);
        }
        if (nam == vbrtcoef)
                return(bright(input[fn].coef));
        n = 3;
        while (n--)
                if (nam == vcolcoef[n])
                        return(colval(input[fn].coef,n));
        eputs("Bad call to l_coef()!\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 (xpos+xoff < 0)
                                xoff = -xpos;
                } else {
                        xoff = d+.5;
                        if (xpos+xoff >= xres)
                                xoff = xres-1-xpos;
                }
        }
        if (n >= 3) {
                d = argument(3);
                if (d < 0.0) {
                        yoff = d-.5;
                        if (yoff+MIDSCN < 0)
                                yoff = -MIDSCN;
                        if (ypos+yoff < 0)
                                yoff = -ypos;
                } else {
                        yoff = d+.5;
                        if (yoff+MIDSCN >= WINSIZ)
                                yoff = WINSIZ-1-MIDSCN;
                        if (ypos+yoff >= yres)
                                yoff = yres-1-ypos;
                }
        }
        if (nam == vbrtin)
                return(bright(input[fn].scan[MIDSCN+yoff][xpos+xoff]));
        n = 3;
        while (n--)
            if (nam == vcolin[n])
                return(colval(input[fn].scan[MIDSCN+yoff][xpos+xoff],n));
        eputs("Bad call to l_colin()!\n");
        quit(1);
}


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


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


quit(code)
int     code;
{
        exit(code);
}
Revision:	1.16
Committed:	Fri May 24 15:47:53 1991 UTC (32 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+47 -37 lines
Log Message:	bug fixes after last change
#	User	Rev	Content
1	greg	1.8	/* Copyright (c) 1991 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			#include <stdio.h>
14
15			#include <errno.h>
16
17			#include "color.h"
18
19			#include "calcomp.h"
20
21	greg	1.6	#define MAXINP 32 /* maximum number of input files */
22	greg	1.14	#define WINSIZ 9 /* scanline window size */
23			#define MIDSCN 4 /* current scan position */
24	greg	1.1
25	greg	1.14	#define BRT (-1) /* special index for brightness */
26
27	greg	1.1	struct {
28			char name; / file name */
29			FILE fp; / stream pointer */
30	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
31	greg	1.3	COLOR coef; /* coefficient */
32	greg	1.1	} input[MAXINP]; /* input pictures */
33
34			int nfiles; /* number of input files */
35
36			char *vcolin[3] = {"ri", "gi", "bi"};
37			char *vcolout[3] = {"ro", "go", "bo"};
38	greg	1.15	char vbrtin[] = "li";
39			char vbrtout[] = "lo";
40			char *vcolcoef[3] = {"rc", "gc", "bc"};
41			char vbrtcoef[] = "lc";
42	greg	1.1
43	greg	1.8	#define vnfiles "nfiles"
44			#define vxres "xres"
45			#define vyres "yres"
46	greg	1.1	#define vxpos "x"
47			#define vypos "y"
48
49			int nowarn = 0; /* no warning messages? */
50
51	greg	1.9	int original = 0; /* origninal values? */
52
53	greg	1.1	int xres=0, yres=0; /* picture resolution */
54
55			int xpos, ypos; /* picture position */
56
57	greg	1.10	int wrongformat = 0;
58	greg	1.1
59	greg	1.10
60	greg	1.1	main(argc, argv)
61			int argc;
62			char *argv[];
63			{
64	greg	1.3	double f;
65	greg	1.14	int a, i;
66	greg	1.15	/* scan options */
67			for (a = 1; a < argc; a++) {
68	greg	1.1	if (argv[a][0] == '-')
69			switch (argv[a][1]) {
70			case 'x':
71			xres = atoi(argv[++a]);
72	greg	1.15	continue;
73	greg	1.1	case 'y':
74			yres = atoi(argv[++a]);
75	greg	1.15	continue;
76	greg	1.1	case 'w':
77			nowarn = !nowarn;
78	greg	1.15	continue;
79	greg	1.9	case 'o':
80			original = !original;
81	greg	1.15	continue;
82	greg	1.1	case 'f':
83			case 'e':
84	greg	1.16	a++;
85	greg	1.15	continue;
86	greg	1.1	}
87	greg	1.15	break;
88			}
89			/* process files */
90	greg	1.3	for (nfiles = 0; nfiles < MAXINP; nfiles++)
91			setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
92	greg	1.1	nfiles = 0;
93			for ( ; a < argc; a++) {
94			if (nfiles >= MAXINP) {
95			eputs(argv[0]);
96			eputs(": too many picture files\n");
97			quit(1);
98			}
99	greg	1.3	if (argv[a][0] == '-')
100			switch (argv[a][1]) {
101			case '\0':
102			input[nfiles].name = "<stdin>";
103			input[nfiles].fp = stdin;
104			break;
105			case 's':
106			f = atof(argv[++a]);
107			scalecolor(input[nfiles].coef, f);
108			continue;
109			case 'c':
110			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
111			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
112			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
113			continue;
114			default:
115			goto usage;
116			}
117			else {
118	greg	1.1	input[nfiles].name = argv[a];
119			input[nfiles].fp = fopen(argv[a], "r");
120			if (input[nfiles].fp == NULL) {
121	greg	1.6	perror(argv[a]);
122	greg	1.1	quit(1);
123			}
124			}
125	greg	1.16	checkfile();
126	greg	1.15	nfiles++;
127			}
128	greg	1.16	init(); /* set constant expressions */
129	greg	1.15	/* go back and get expressions */
130			for (a = 1; a < argc; a++) {
131			if (argv[a][0] == '-')
132			switch (argv[a][1]) {
133			case 'x':
134			case 'y':
135	greg	1.16	a++;
136			continue;
137	greg	1.15	case 'w':
138			case 'o':
139			continue;
140			case 'f':
141			fcompile(argv[++a]);
142			continue;
143			case 'e':
144			scompile(argv[++a], NULL, 0);
145			continue;
146			}
147			break;
148			}
149			/* complete header */
150			printargs(argc, argv, stdout);
151			fputformat(COLRFMT, stdout);
152			putchar('\n');
153			fputresolu(YMAJOR\|YDECR, xres, yres, stdout);
154			/* combine pictures */
155			combine();
156			quit(0);
157			usage:
158			eputs("Usage: ");
159			eputs(argv[0]);
160			eputs(
161			" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-s f][-c r g b] pic ..]\n");
162			quit(1);
163			}
164
165
166			tputs(s) /* put out string preceded by a tab */
167			char *s;
168			{
169			char fmt[32];
170			double d;
171			COLOR ctmp;
172
173			if (isformat(s)) { /* check format */
174			formatval(fmt, s);
175			wrongformat = strcmp(fmt, COLRFMT);
176			} else if (original && isexpos(s)) { /* exposure */
177			d = 1.0/exposval(s);
178			scalecolor(input[nfiles].coef, d);
179			} else if (original && iscolcor(s)) { /* color correction */
180			colcorval(ctmp, s);
181			colval(input[nfiles].coef,RED) /= colval(ctmp,RED);
182			colval(input[nfiles].coef,GRN) /= colval(ctmp,GRN);
183			colval(input[nfiles].coef,BLU) /= colval(ctmp,BLU);
184			} else { /* echo unaffected line */
185			putchar('\t');
186			fputs(s, stdout);
187			}
188	greg	1.16	}
189	greg	1.15
190	greg	1.16
191			checkfile() /* ready a file */
192			{
193			register int i;
194			/* process header */
195			fputs(input[nfiles].name, stdout);
196			fputs(":\n", stdout);
197			getheader(input[nfiles].fp, tputs, NULL);
198			if (wrongformat) {
199			eputs(input[nfiles].name);
200			eputs(": not in Radiance picture format\n");
201			quit(1);
202			}
203			if (fgetresolu(&xpos, &ypos, input[nfiles].fp) != (YMAJOR\|YDECR)) {
204			eputs(input[nfiles].name);
205			eputs(": bad picture size\n");
206			quit(1);
207			}
208			if (xres == 0 && yres == 0) {
209			xres = xpos;
210			yres = ypos;
211			} else if (xpos != xres \|\| ypos != yres) {
212			eputs(input[nfiles].name);
213			eputs(": resolution mismatch\n");
214			quit(1);
215			}
216			/* allocate scanlines */
217			for (i = 0; i < WINSIZ; i++)
218			input[nfiles].scan[i] = (COLOR )emalloc(xressizeof(COLOR));
219	greg	1.15	}
220
221
222	greg	1.16	init() /* perform final setup */
223	greg	1.15	{
224			double l_colin(), l_coef();
225	greg	1.16	register int i;
226	greg	1.15	/* prime input */
227			for (ypos = yres+(MIDSCN-1); ypos >= yres; ypos--)
228			advance();
229			/* define constants */
230			varset(vnfiles, ':', (double)nfiles);
231			varset(vxres, ':', (double)xres);
232			varset(vyres, ':', (double)yres);
233			/* set functions */
234			for (i = 0; i < 3; i++) {
235			funset(vcolcoef[i], 1, ':', l_coef);
236			funset(vcolin[i], 1, '=', l_colin);
237			}
238			funset(vbrtcoef, 1, ':', l_coef);
239			funset(vbrtin, 1, '=', l_colin);
240	greg	1.1	}
241
242
243			combine() /* combine pictures */
244			{
245	greg	1.8	EPNODE coldef[3], brtdef;
246	greg	1.1	COLOR *scanout;
247	greg	1.8	double d;
248	greg	1.1	register int i, j;
249			/* check defined variables */
250	greg	1.4	for (j = 0; j < 3; j++) {
251			if (vardefined(vcolout[j]))
252			coldef[j] = eparse(vcolout[j]);
253			else
254			coldef[j] = NULL;
255			}
256	greg	1.8	if (vardefined(vbrtout))
257			brtdef = eparse(vbrtout);
258			else
259			brtdef = NULL;
260	greg	1.1	/* allocate scanline */
261			scanout = (COLOR )emalloc(xressizeof(COLOR));
262			/* combine files */
263			for (ypos = yres-1; ypos >= 0; ypos--) {
264	greg	1.14	advance();
265	greg	1.11	varset(vypos, '=', (double)ypos);
266	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
267	greg	1.11	varset(vxpos, '=', (double)xpos);
268	greg	1.8	eclock++;
269			if (brtdef != NULL) {
270			d = evalue(brtdef);
271			if (d < 0.0)
272			d = 0.0;
273			setcolor(scanout[xpos], d, d, d);
274			} else {
275			for (j = 0; j < 3; j++) {
276			if (coldef[j] != NULL) {
277	greg	1.13	d = evalue(coldef[j]);
278	greg	1.8	} else {
279	greg	1.13	d = 0.0;
280	greg	1.8	for (i = 0; i < nfiles; i++)
281	greg	1.14	d += colval(input[i].scan[MIDSCN][xpos],j);
282	greg	1.1	}
283	greg	1.13	if (d < 0.0)
284			d = 0.0;
285			colval(scanout[xpos],j) = d;
286	greg	1.8	}
287	greg	1.1	}
288	greg	1.8	}
289			if (fwritescan(scanout, xres, stdout) < 0) {
290			perror("write error");
291			quit(1);
292			}
293	greg	1.1	}
294			efree(scanout);
295			}
296
297
298	greg	1.14	advance() /* read in next scanline */
299			{
300			register COLOR *st;
301			register int i, j;
302
303			for (i = 0; i < nfiles; i++) {
304			st = input[i].scan[WINSIZ-1];
305			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
306			input[i].scan[j] = input[i].scan[j-1];
307			input[i].scan[0] = st;
308			if (ypos < MIDSCN) /* hit bottom */
309			continue;
310			if (freadscan(st, xres, input[i].fp) < 0) {
311			eputs(input[i].name);
312			eputs(": read error\n");
313			quit(1);
314			}
315			for (j = 0; j < xres; j++) /* adjust color */
316			multcolor(st[j], input[i].coef);
317			}
318			}
319
320
321	greg	1.1	double
322	greg	1.15	l_coef(nam) /* return picture coefficients */
323			register char *nam;
324	greg	1.1	{
325	greg	1.15	register int fn, n;
326	greg	1.14	double d;
327
328	greg	1.16	d = argument(1);
329			if (d > -.5 && d < .5)
330			return((double)nfiles);
331			fn = d - .5;
332			if (fn < 0 \|\| fn >= nfiles) {
333	greg	1.1	errno = EDOM;
334			return(0.0);
335			}
336	greg	1.15	if (nam == vbrtcoef)
337			return(bright(input[fn].coef));
338			n = 3;
339			while (n--)
340			if (nam == vcolcoef[n])
341			return(colval(input[fn].coef,n));
342			eputs("Bad call to l_coef()!\n");
343			quit(1);
344			}
345
346
347			double
348			l_colin(nam) /* return color value for picture */
349			register char *nam;
350			{
351			int fn;
352			register int n, xoff, yoff;
353			double d;
354
355	greg	1.16	d = argument(1);
356			if (d > -.5 && d < .5)
357			return((double)nfiles);
358			fn = d - .5;
359			if (fn < 0 \|\| fn >= nfiles) {
360	greg	1.15	errno = EDOM;
361			return(0.0);
362			}
363	greg	1.14	xoff = yoff = 0;
364			n = nargum();
365			if (n >= 2) {
366			d = argument(2);
367			if (d < 0.0) {
368			xoff = d-.5;
369			if (xpos+xoff < 0)
370			xoff = -xpos;
371			} else {
372			xoff = d+.5;
373			if (xpos+xoff >= xres)
374			xoff = xres-1-xpos;
375			}
376			}
377			if (n >= 3) {
378			d = argument(3);
379			if (d < 0.0) {
380			yoff = d-.5;
381			if (yoff+MIDSCN < 0)
382			yoff = -MIDSCN;
383			if (ypos+yoff < 0)
384			yoff = -ypos;
385			} else {
386			yoff = d+.5;
387			if (yoff+MIDSCN >= WINSIZ)
388			yoff = WINSIZ-1-MIDSCN;
389			if (ypos+yoff >= yres)
390			yoff = yres-1-ypos;
391			}
392			}
393	greg	1.15	if (nam == vbrtin)
394	greg	1.14	return(bright(input[fn].scan[MIDSCN+yoff][xpos+xoff]));
395	greg	1.15	n = 3;
396			while (n--)
397			if (nam == vcolin[n])
398			return(colval(input[fn].scan[MIDSCN+yoff][xpos+xoff],n));
399			eputs("Bad call to l_colin()!\n");
400			quit(1);
401	greg	1.1	}
402
403
404			wputs(msg)
405			char *msg;
406			{
407			if (!nowarn)
408			eputs(msg);
409			}
410
411
412			eputs(msg)
413			char *msg;
414			{
415			fputs(msg, stderr);
416			}
417
418
419			quit(code)
420			int code;
421			{
422			exit(code);
423			}