src/px/pcompos.c

/* Copyright (c) 1993 Regents of the University of California */

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

/*
 *  pcompos.c - program to composite pictures.
 *
 *     6/30/87
 */

#include  <stdio.h>

#include  <math.h>

#ifdef MSDOS
#include  <fcntl.h>
#endif

#include  "color.h"

#include  "resolu.h"

#define  MAXFILE        64

#define  HASMIN         1
#define  HASMAX         2

                                        /* output picture size */
int  xsiz = 0;
int  ysiz = 0;
                                        /* input dimensions */
int  xmin = 0;
int  ymin = 0;
int  xmax = 0;
int  ymax = 0;

COLR  bgcolr = BLKCOLR;                 /* background color */

int  labelht = 24;                      /* label height */

int  checkthresh = 0;                   /* check threshold value */

char  Command[] = "<Command>";
char  Label[] = "<Label>";

char  *progname;

struct {
        char  *name;                    /* file or command name */
        FILE  *fp;                      /* stream pointer */
        int  xres, yres;                /* picture size */
        int  xloc, yloc;                /* anchor point */
        int  flags;                     /* HASMIN, HASMAX */
        COLR  thmin, thmax;             /* thresholds */
} input[MAXFILE];               /* our input files */

int  nfile;                     /* number of files */

char  ourfmt[LPICFMT+1] = PICFMT;
int  wrongformat = 0;

FILE  *popen(), *lblopen();

extern char  *malloc();


tabputs(s)                      /* print line preceded by a tab */
char  *s;
{
        char  fmt[32];

        if (isheadid(s))
                return(0);
        if (formatval(fmt, s)) {
                if (globmatch(ourfmt, fmt)) {
                        wrongformat = 0;
                        strcpy(ourfmt, fmt);
                } else
                        wrongformat = 1;
        } else {
                putc('\t', stdout);
                fputs(s, stdout);
        }
        return(0);
}


main(argc, argv)
int  argc;
char  *argv[];
{
        int  ncolumns = 0;
        int  autolabel = 0;
        int  curcol = 0, x0 = 0, curx = 0, cury = 0, spacing = 0;
        int  xsgn, ysgn;
        char  *thislabel;
        int  an;
#ifdef MSDOS
        extern int  _fmode;
        _fmode = O_BINARY;
        setmode(fileno(stdin), O_BINARY);
        setmode(fileno(stdout), O_BINARY);
#endif
        progname = argv[0];

        for (an = 1; an < argc && argv[an][0] == '-'; an++)
                switch (argv[an][1]) {
                case 'x':
                        xsiz = atoi(argv[++an]);
                        break;
                case 'y':
                        ysiz = atoi(argv[++an]);
                        break;
                case 'b':
                        setcolr(bgcolr, atof(argv[an+1]),
                                        atof(argv[an+2]),
                                        atof(argv[an+3]));
                        an += 3;
                        break;
                case 'a':
                        ncolumns = atoi(argv[++an]);
                        break;
                case 's':
                        spacing = atoi(argv[++an]);
                        break;
                case 'o':
                        curx = x0 = atoi(argv[++an]);
                        cury = atoi(argv[++an]);
                        break;
                case 'l':
                        switch (argv[an][2]) {
                        case 'a':
                                autolabel++;
                                break;
                        case 'h':
                                labelht = atoi(argv[++an]);
                                break;
                        case '\0':
                                goto dofiles;
                        default:
                                goto userr;
                        }
                        break;
                case '\0':
                case 't':
                        goto dofiles;
                default:
                        goto userr;
                }
dofiles:
        newheader("RADIANCE", stdout);
        for (nfile = 0; an < argc; nfile++) {
                if (nfile >= MAXFILE)
                        goto toomany;
                thislabel = NULL;
                input[nfile].flags = 0;
                xsgn = ysgn = '-';
                while (an < argc && (argv[an][0] == '-' || argv[an][0] == '+'
                                || argv[an][0] == '=')) {
                        switch (argv[an][1]) {
                        case 't':
                                checkthresh = 1;
                                if (argv[an][0] == '-') {
                                        input[nfile].flags |= HASMIN;
                                        setcolr(input[nfile].thmin,
                                                        atof(argv[an+1]),
                                                        atof(argv[an+1]),
                                                        atof(argv[an+1]));
                                } else if (argv[an][0] == '+') {
                                        input[nfile].flags |= HASMAX;
                                        setcolr(input[nfile].thmax,
                                                        atof(argv[an+1]),
                                                        atof(argv[an+1]),
                                                        atof(argv[an+1]));
                                } else
                                        goto userr;
                                an++;
                                break;
                        case 'l':
                                if (strcmp(argv[an], "-l"))
                                        goto userr;
                                thislabel = argv[++an];
                                break;
                        case '+':
                        case '-':
                        case '0':
                                if (argv[an][0] != '=')
                                        goto userr;
                                xsgn = argv[an][1];
                                ysgn = argv[an][2];
                                if (ysgn != '+' && ysgn != '-' && ysgn != '0')
                                        goto userr;
                                break;
                        case '\0':
                                if (argv[an][0] == '-')
                                        goto getfile;
                                goto userr;
                        default:
                                goto userr;
                        }
                        an++;
                }
getfile:
                if (argc-an < (ncolumns ? 1 : 3))
                        goto userr;
                if (autolabel && thislabel == NULL)
                        thislabel = argv[an];
                if (!strcmp(argv[an], "-")) {
                        input[nfile].name = "<stdin>";
                        input[nfile].fp = stdin;
                } else {
                        if (argv[an][0] == '!') {
                                input[nfile].name = Command;
                                input[nfile].fp = popen(argv[an]+1, "r");
                        } else {
                                input[nfile].name = argv[an];
                                input[nfile].fp = fopen(argv[an], "r");
                        }
                        if (input[nfile].fp == NULL) {
                                perror(argv[an]);
                                quit(1);
                        }
                }
                an++;
                                                /* get header */
                printf("%s:\n", input[nfile].name);
                getheader(input[nfile].fp, tabputs, NULL);
                if (wrongformat) {
                        fprintf(stderr, "%s: bad Radiance input file\n",
                                        input[nfile].name);
                        quit(1);
                }
                                                /* get picture size */
                if (fgetresolu(&input[nfile].xres, &input[nfile].yres,
                                input[nfile].fp) < 0) {
                        fprintf(stderr, "%s: bad picture size\n",
                                        input[nfile].name);
                        quit(1);
                }
                if (ncolumns > 0) {
                        if (curcol >= ncolumns) {
                                cury = ymax + spacing;
                                curx = x0;
                                curcol = 0;
                        }
                        input[nfile].xloc = curx;
                        input[nfile].yloc = cury;
                        curx += input[nfile].xres + spacing;
                        curcol++;
                } else {
                        input[nfile].xloc = atoi(argv[an++]);
                        if (xsgn == '+')
                                input[nfile].xloc -= input[nfile].xres;
                        else if (xsgn == '0')
                                input[nfile].xloc -= input[nfile].xres/2;
                        input[nfile].yloc = atoi(argv[an++]);
                        if (ysgn == '+')
                                input[nfile].yloc -= input[nfile].yres;
                        else if (ysgn == '0')
                                input[nfile].yloc -= input[nfile].yres/2;
                }
                if (input[nfile].xloc < xmin)
                        xmin = input[nfile].xloc;
                if (input[nfile].yloc < ymin)
                        ymin = input[nfile].yloc;
                if (input[nfile].xloc+input[nfile].xres > xmax)
                        xmax = input[nfile].xloc+input[nfile].xres;
                if (input[nfile].yloc+input[nfile].yres > ymax)
                        ymax = input[nfile].yloc+input[nfile].yres;
                if (thislabel != NULL) {
                        if (++nfile >= MAXFILE)
                                goto toomany;
                        input[nfile].name = Label;
                        input[nfile].flags = 0;
                        input[nfile].xres = input[nfile-1].xres;
                        input[nfile].yres = labelht;
                        if ((input[nfile].fp = lblopen(thislabel,
                                        &input[nfile].xres,
                                        &input[nfile].yres)) == NULL)
                                goto labelerr;
                        input[nfile].xloc = input[nfile-1].xloc;
                        input[nfile].yloc = input[nfile-1].yloc +
                                        input[nfile-1].yres-input[nfile].yres;
                }
        }
        if (xsiz <= 0)
                xsiz = xmax;
        else if (xsiz > xmax)
                xmax = xsiz;
        if (ysiz <= 0)
                ysiz = ymax;
        else if (ysiz > ymax)
                ymax = ysiz;
                                        /* add new header info. */
        printargs(argc, argv, stdout);
        if (strcmp(ourfmt, PICFMT))
                fputformat(ourfmt, stdout);     /* print format if known */
        putchar('\n');
        fprtresolu(xsiz, ysiz, stdout);

        compos();
        
        quit(0);
userr:
        fprintf(stderr,
        "Usage: %s [-x xr][-y yr][-b r g b][-a n][-s p][-o x0 y0][-la][-lh h] ",
                        progname);
        fprintf(stderr, "[-t min1][+t max1][-l lab][=SS] pic1 x1 y1 ..\n");
        quit(1);
toomany:
        fprintf(stderr, "%s: only %d files and labels allowed\n",
                        progname, MAXFILE);
        quit(1);
labelerr:
        fprintf(stderr, "%s: error opening label\n", progname);
        quit(1);
}


compos()                                /* composite pictures */
{
        COLR  *scanin, *scanout;
        int  y;
        register int  x, i;

        scanin = (COLR *)malloc((xmax-xmin)*sizeof(COLR));
        if (scanin == NULL)
                goto memerr;
        scanin -= xmin;
        if (checkthresh) {
                scanout = (COLR *)malloc(xsiz*sizeof(COLR));
                if (scanout == NULL)
                        goto memerr;
        } else
                scanout = scanin;
        for (y = ymax-1; y >= 0; y--) {
                for (x = 0; x < xsiz; x++)
                        copycolr(scanout[x], bgcolr);
                for (i = 0; i < nfile; i++) {
                        if (input[i].yloc > y ||
                                        input[i].yloc+input[i].yres <= y)
                                continue;
                        if (freadcolrs(scanin+input[i].xloc,
                                        input[i].xres, input[i].fp) < 0) {
                                fprintf(stderr, "%s: read error (y==%d)\n",
                                                input[i].name,
                                                y-input[i].yloc);
                                quit(1);
                        }
                        if (y >= ysiz)
                                continue;
                        if (checkthresh) {
                                x = input[i].xloc+input[i].xres;
                                if (x > xsiz)
                                        x = xsiz;
                                for (x--; x >= 0 && x >= input[i].xloc; x--) {
                                        if (input[i].flags & HASMIN &&
                                        cmpcolr(scanin[x], input[i].thmin) <= 0)
                                                continue;
                                        if (input[i].flags & HASMAX &&
                                        cmpcolr(scanin[x], input[i].thmax) >= 0)
                                                continue;
                                        copycolr(scanout[x], scanin[x]);
                                }
                        }
                }
                if (y >= ysiz)
                        continue;
                if (fwritecolrs(scanout, xsiz, stdout) < 0) {
                        perror(progname);
                        quit(1);
                }
        }
        return;
memerr:
        perror(progname);
        quit(1);
}


int
cmpcolr(c1, c2)                 /* compare two colr's (improvisation) */
register COLR  c1, c2;
{
        register int  i, j;

        j = 4;                          /* check exponents first! */
        while (j--)
                if (i = c1[j] - c2[j])
                        return(i);
        return(0);
}


FILE *
lblopen(s, xp, yp)              /* open pipe to label generator */
char  *s;
int  *xp, *yp;
{
        char  com[128];
        FILE  *fp;

        sprintf(com, "psign -s -.15 -a 2 -x %d -y %d '%.90s'", *xp, *yp, s);
        if ((fp = popen(com, "r")) == NULL)
                return(NULL);
        if (checkheader(fp, COLRFMT, NULL) < 0)
                goto err;
        if (fgetresolu(xp, yp, fp) < 0)
                goto err;
        return(fp);
err:
        pclose(fp);
        return(NULL);
}


quit(code)              /* exit gracefully */
int  code;
{
        register int  i;
                                /* close input files */
        for (i = 0; i < nfile; i++)
                if (input[i].name == Command || input[i].name == Label)
                        pclose(input[i].fp);
                else
                        fclose(input[i].fp);
        exit(code);
}
Revision:	2.20
Committed:	Tue Oct 27 09:08:25 1998 UTC (25 years, 6 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 2.19:	+2 -1 lines
Log Message:	changed getheader() to listen to return value of passed function
#	User	Rev	Content
1	greg	2.17	/* Copyright (c) 1993 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* pcompos.c - program to composite pictures.
9			*
10			* 6/30/87
11			*/
12
13			#include <stdio.h>
14
15	greg	2.16	#include <math.h>
16
17	greg	2.15	#ifdef MSDOS
18			#include <fcntl.h>
19			#endif
20
21	greg	1.1	#include "color.h"
22
23	greg	1.10	#include "resolu.h"
24	greg	1.1
25	greg	2.15	#define MAXFILE 64
26	greg	1.1
27	greg	2.17	#define HASMIN 1
28			#define HASMAX 2
29
30	greg	1.1	/* output picture size */
31			int xsiz = 0;
32			int ysiz = 0;
33			/* input dimensions */
34			int xmin = 0;
35			int ymin = 0;
36			int xmax = 0;
37			int ymax = 0;
38
39			COLR bgcolr = BLKCOLR; /* background color */
40
41	greg	1.9	int labelht = 24; /* label height */
42
43	greg	1.1	int checkthresh = 0; /* check threshold value */
44
45	greg	2.14	char Command[] = "<Command>";
46			char Label[] = "<Label>";
47
48	greg	1.1	char *progname;
49
50			struct {
51	greg	1.7	char name; / file or command name */
52	greg	1.1	FILE fp; / stream pointer */
53			int xres, yres; /* picture size */
54			int xloc, yloc; /* anchor point */
55	greg	2.17	int flags; /* HASMIN, HASMAX */
56	greg	1.1	COLR thmin, thmax; /* thresholds */
57			} input[MAXFILE]; /* our input files */
58
59			int nfile; /* number of files */
60
61	greg	2.19	char ourfmt[LPICFMT+1] = PICFMT;
62	greg	1.6	int wrongformat = 0;
63	greg	1.1
64	greg	1.9	FILE popen(), lblopen();
65	greg	1.6
66	greg	2.15	extern char *malloc();
67	greg	1.7
68	greg	2.15
69	greg	1.1	tabputs(s) /* print line preceded by a tab */
70			char *s;
71			{
72	greg	1.6	char fmt[32];
73
74	greg	2.18	if (isheadid(s))
75	gwlarson	2.20	return(0);
76	greg	2.19	if (formatval(fmt, s)) {
77			if (globmatch(ourfmt, fmt)) {
78			wrongformat = 0;
79			strcpy(ourfmt, fmt);
80			} else
81			wrongformat = 1;
82			} else {
83	greg	1.6	putc('\t', stdout);
84			fputs(s, stdout);
85			}
86	gwlarson	2.20	return(0);
87	greg	1.1	}
88
89
90			main(argc, argv)
91			int argc;
92			char *argv[];
93			{
94	greg	1.7	int ncolumns = 0;
95	greg	1.9	int autolabel = 0;
96	greg	2.11	int curcol = 0, x0 = 0, curx = 0, cury = 0, spacing = 0;
97	greg	2.17	int xsgn, ysgn;
98	greg	1.9	char *thislabel;
99	greg	1.1	int an;
100	greg	2.15	#ifdef MSDOS
101			extern int _fmode;
102			_fmode = O_BINARY;
103			setmode(fileno(stdin), O_BINARY);
104			setmode(fileno(stdout), O_BINARY);
105			#endif
106	greg	1.1	progname = argv[0];
107
108			for (an = 1; an < argc && argv[an][0] == '-'; an++)
109			switch (argv[an][1]) {
110			case 'x':
111	greg	2.11	xsiz = atoi(argv[++an]);
112	greg	1.1	break;
113			case 'y':
114	greg	2.11	ysiz = atoi(argv[++an]);
115	greg	1.1	break;
116			case 'b':
117			setcolr(bgcolr, atof(argv[an+1]),
118			atof(argv[an+2]),
119			atof(argv[an+3]));
120			an += 3;
121			break;
122	greg	1.7	case 'a':
123			ncolumns = atoi(argv[++an]);
124			break;
125	greg	2.11	case 's':
126			spacing = atoi(argv[++an]);
127			break;
128			case 'o':
129			curx = x0 = atoi(argv[++an]);
130			cury = atoi(argv[++an]);
131			break;
132	greg	1.7	case 'l':
133	greg	1.9	switch (argv[an][2]) {
134			case 'a':
135			autolabel++;
136			break;
137			case 'h':
138			labelht = atoi(argv[++an]);
139			break;
140			case '\0':
141			goto dofiles;
142			default:
143			goto userr;
144			}
145	greg	1.7	break;
146	greg	1.1	case '\0':
147			case 't':
148			goto dofiles;
149			default:
150			goto userr;
151			}
152			dofiles:
153	greg	2.18	newheader("RADIANCE", stdout);
154	greg	1.1	for (nfile = 0; an < argc; nfile++) {
155	greg	1.9	if (nfile >= MAXFILE)
156			goto toomany;
157	greg	2.6	thislabel = NULL;
158	greg	2.17	input[nfile].flags = 0;
159			xsgn = ysgn = '-';
160			while (an < argc && (argv[an][0] == '-' \|\| argv[an][0] == '+'
161			\|\| argv[an][0] == '=')) {
162	greg	1.1	switch (argv[an][1]) {
163			case 't':
164			checkthresh = 1;
165			if (argv[an][0] == '-') {
166	greg	2.17	input[nfile].flags \|= HASMIN;
167	greg	1.1	setcolr(input[nfile].thmin,
168			atof(argv[an+1]),
169			atof(argv[an+1]),
170			atof(argv[an+1]));
171	greg	2.17	} else if (argv[an][0] == '+') {
172			input[nfile].flags \|= HASMAX;
173	greg	1.1	setcolr(input[nfile].thmax,
174			atof(argv[an+1]),
175			atof(argv[an+1]),
176			atof(argv[an+1]));
177	greg	2.17	} else
178			goto userr;
179			an++;
180	greg	1.1	break;
181	greg	1.9	case 'l':
182			if (strcmp(argv[an], "-l"))
183			goto userr;
184	greg	2.17	thislabel = argv[++an];
185	greg	1.9	break;
186	greg	2.17	case '+':
187			case '-':
188			case '0':
189			if (argv[an][0] != '=')
190			goto userr;
191			xsgn = argv[an][1];
192			ysgn = argv[an][2];
193			if (ysgn != '+' && ysgn != '-' && ysgn != '0')
194			goto userr;
195			break;
196	greg	1.1	case '\0':
197			if (argv[an][0] == '-')
198			goto getfile;
199	greg	1.9	goto userr;
200	greg	1.1	default:
201			goto userr;
202			}
203	greg	2.17	an++;
204			}
205	greg	1.1	getfile:
206	greg	1.7	if (argc-an < (ncolumns ? 1 : 3))
207	greg	1.1	goto userr;
208	greg	2.6	if (autolabel && thislabel == NULL)
209			thislabel = argv[an];
210	greg	1.1	if (!strcmp(argv[an], "-")) {
211			input[nfile].name = "<stdin>";
212			input[nfile].fp = stdin;
213			} else {
214	greg	2.4	if (argv[an][0] == '!') {
215	greg	2.14	input[nfile].name = Command;
216	greg	2.4	input[nfile].fp = popen(argv[an]+1, "r");
217			} else {
218			input[nfile].name = argv[an];
219			input[nfile].fp = fopen(argv[an], "r");
220			}
221			if (input[nfile].fp == NULL) {
222	greg	1.5	perror(argv[an]);
223	greg	1.1	quit(1);
224			}
225			}
226			an++;
227			/* get header */
228			printf("%s:\n", input[nfile].name);
229	greg	1.6	getheader(input[nfile].fp, tabputs, NULL);
230			if (wrongformat) {
231	greg	2.19	fprintf(stderr, "%s: bad Radiance input file\n",
232	greg	1.6	input[nfile].name);
233			quit(1);
234			}
235	greg	1.1	/* get picture size */
236	greg	1.4	if (fgetresolu(&input[nfile].xres, &input[nfile].yres,
237	greg	1.10	input[nfile].fp) < 0) {
238	greg	1.1	fprintf(stderr, "%s: bad picture size\n",
239			input[nfile].name);
240			quit(1);
241			}
242	greg	1.7	if (ncolumns > 0) {
243			if (curcol >= ncolumns) {
244	greg	2.11	cury = ymax + spacing;
245			curx = x0;
246	greg	1.7	curcol = 0;
247			}
248			input[nfile].xloc = curx;
249			input[nfile].yloc = cury;
250	greg	2.11	curx += input[nfile].xres + spacing;
251	greg	1.7	curcol++;
252			} else {
253			input[nfile].xloc = atoi(argv[an++]);
254	greg	2.17	if (xsgn == '+')
255			input[nfile].xloc -= input[nfile].xres;
256			else if (xsgn == '0')
257			input[nfile].xloc -= input[nfile].xres/2;
258	greg	1.7	input[nfile].yloc = atoi(argv[an++]);
259	greg	2.17	if (ysgn == '+')
260			input[nfile].yloc -= input[nfile].yres;
261			else if (ysgn == '0')
262			input[nfile].yloc -= input[nfile].yres/2;
263	greg	1.7	}
264	greg	1.1	if (input[nfile].xloc < xmin)
265			xmin = input[nfile].xloc;
266			if (input[nfile].yloc < ymin)
267			ymin = input[nfile].yloc;
268			if (input[nfile].xloc+input[nfile].xres > xmax)
269			xmax = input[nfile].xloc+input[nfile].xres;
270			if (input[nfile].yloc+input[nfile].yres > ymax)
271			ymax = input[nfile].yloc+input[nfile].yres;
272	greg	1.9	if (thislabel != NULL) {
273			if (++nfile >= MAXFILE)
274			goto toomany;
275	greg	2.14	input[nfile].name = Label;
276	greg	2.17	input[nfile].flags = 0;
277	greg	2.7	input[nfile].xres = input[nfile-1].xres;
278			input[nfile].yres = labelht;
279	greg	1.9	if ((input[nfile].fp = lblopen(thislabel,
280			&input[nfile].xres,
281			&input[nfile].yres)) == NULL)
282	greg	1.7	goto labelerr;
283			input[nfile].xloc = input[nfile-1].xloc;
284			input[nfile].yloc = input[nfile-1].yloc +
285	greg	1.9	input[nfile-1].yres-input[nfile].yres;
286	greg	1.7	}
287	greg	1.1	}
288			if (xsiz <= 0)
289			xsiz = xmax;
290	greg	2.11	else if (xsiz > xmax)
291			xmax = xsiz;
292	greg	1.1	if (ysiz <= 0)
293			ysiz = ymax;
294	greg	2.11	else if (ysiz > ymax)
295			ymax = ysiz;
296	greg	1.1	/* add new header info. */
297			printargs(argc, argv, stdout);
298	greg	2.19	if (strcmp(ourfmt, PICFMT))
299			fputformat(ourfmt, stdout); /* print format if known */
300	greg	1.10	putchar('\n');
301			fprtresolu(xsiz, ysiz, stdout);
302	greg	1.1
303			compos();
304
305			quit(0);
306			userr:
307	greg	2.11	fprintf(stderr,
308			"Usage: %s [-x xr][-y yr][-b r g b][-a n][-s p][-o x0 y0][-la][-lh h] ",
309	greg	1.8	progname);
310	greg	2.17	fprintf(stderr, "[-t min1][+t max1][-l lab][=SS] pic1 x1 y1 ..\n");
311	greg	1.7	quit(1);
312	greg	1.9	toomany:
313			fprintf(stderr, "%s: only %d files and labels allowed\n",
314			progname, MAXFILE);
315			quit(1);
316	greg	1.7	labelerr:
317			fprintf(stderr, "%s: error opening label\n", progname);
318	greg	1.1	quit(1);
319			}
320
321
322			compos() /* composite pictures */
323			{
324			COLR scanin, scanout;
325			int y;
326			register int x, i;
327
328	greg	1.3	scanin = (COLR )malloc((xmax-xmin)sizeof(COLR));
329	greg	1.1	if (scanin == NULL)
330			goto memerr;
331			scanin -= xmin;
332			if (checkthresh) {
333			scanout = (COLR )malloc(xsizsizeof(COLR));
334			if (scanout == NULL)
335			goto memerr;
336			} else
337			scanout = scanin;
338			for (y = ymax-1; y >= 0; y--) {
339			for (x = 0; x < xsiz; x++)
340			copycolr(scanout[x], bgcolr);
341			for (i = 0; i < nfile; i++) {
342			if (input[i].yloc > y \|\|
343			input[i].yloc+input[i].yres <= y)
344			continue;
345			if (freadcolrs(scanin+input[i].xloc,
346			input[i].xres, input[i].fp) < 0) {
347	greg	1.2	fprintf(stderr, "%s: read error (y==%d)\n",
348			input[i].name,
349			y-input[i].yloc);
350	greg	1.1	quit(1);
351			}
352			if (y >= ysiz)
353			continue;
354			if (checkthresh) {
355			x = input[i].xloc+input[i].xres;
356			if (x > xsiz)
357			x = xsiz;
358			for (x--; x >= 0 && x >= input[i].xloc; x--) {
359	greg	2.17	if (input[i].flags & HASMIN &&
360	greg	1.1	cmpcolr(scanin[x], input[i].thmin) <= 0)
361			continue;
362	greg	2.17	if (input[i].flags & HASMAX &&
363	greg	1.1	cmpcolr(scanin[x], input[i].thmax) >= 0)
364			continue;
365			copycolr(scanout[x], scanin[x]);
366			}
367			}
368			}
369			if (y >= ysiz)
370			continue;
371			if (fwritecolrs(scanout, xsiz, stdout) < 0) {
372	greg	1.5	perror(progname);
373	greg	1.1	quit(1);
374			}
375			}
376			return;
377			memerr:
378	greg	1.5	perror(progname);
379	greg	1.1	quit(1);
380			}
381
382
383			int
384			cmpcolr(c1, c2) /* compare two colr's (improvisation) */
385			register COLR c1, c2;
386			{
387			register int i, j;
388
389			j = 4; /* check exponents first! */
390			while (j--)
391			if (i = c1[j] - c2[j])
392			return(i);
393			return(0);
394	greg	1.9	}
395
396
397			FILE *
398			lblopen(s, xp, yp) /* open pipe to label generator */
399			char *s;
400			int xp, yp;
401			{
402			char com[128];
403			FILE *fp;
404
405	greg	2.7	sprintf(com, "psign -s -.15 -a 2 -x %d -y %d '%.90s'", xp, yp, s);
406	greg	1.9	if ((fp = popen(com, "r")) == NULL)
407			return(NULL);
408			if (checkheader(fp, COLRFMT, NULL) < 0)
409			goto err;
410	greg	1.10	if (fgetresolu(xp, yp, fp) < 0)
411	greg	1.9	goto err;
412			return(fp);
413			err:
414			pclose(fp);
415			return(NULL);
416	greg	1.1	}
417
418
419			quit(code) /* exit gracefully */
420			int code;
421			{
422	greg	2.13	register int i;
423			/* close input files */
424			for (i = 0; i < nfile; i++)
425	greg	2.14	if (input[i].name == Command \|\| input[i].name == Label)
426			pclose(input[i].fp);
427			else
428			fclose(input[i].fp);
429	greg	1.1	exit(code);
430			}