src/px/pcompos.c

#ifndef lint
static const char       RCSid[] = "$Id: pcompos.c,v 2.21 2003/02/22 02:07:27 greg Exp $";
#endif
/*
 *  pcompos.c - program to composite pictures.
 *
 *     6/30/87
 */

#include  <stdio.h>
#include  <math.h>
#include  <time.h>

#include "copyright.h"

#include  "platform.h"
#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  *lblopen();
void  quit();


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;
        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        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);
        fputnow(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: incompatible input format\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);
}


void
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:	2.22
Committed:	Thu Jun 5 19:29:34 2003 UTC (20 years, 10 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.21:	+7 -14 lines
Log Message:	Macros for setting binary file mode. Replacing MSDOS by _WIN32.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.22	static const char RCSid[] = "$Id: pcompos.c,v 2.21 2003/02/22 02:07:27 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* pcompos.c - program to composite pictures.
6			*
7			* 6/30/87
8			*/
9
10			#include <stdio.h>
11	greg	2.16	#include <math.h>
12	schorsch	2.22	#include <time.h>
13	greg	2.16
14	schorsch	2.22	#include "copyright.h"
15	greg	2.21
16	schorsch	2.22	#include "platform.h"
17	greg	1.1	#include "color.h"
18	greg	1.10	#include "resolu.h"
19	greg	1.1
20	greg	2.15	#define MAXFILE 64
21	greg	1.1
22	greg	2.17	#define HASMIN 1
23			#define HASMAX 2
24
25	greg	1.1	/* output picture size */
26			int xsiz = 0;
27			int ysiz = 0;
28			/* input dimensions */
29			int xmin = 0;
30			int ymin = 0;
31			int xmax = 0;
32			int ymax = 0;
33
34			COLR bgcolr = BLKCOLR; /* background color */
35
36	greg	1.9	int labelht = 24; /* label height */
37
38	greg	1.1	int checkthresh = 0; /* check threshold value */
39
40	greg	2.14	char Command[] = "<Command>";
41			char Label[] = "<Label>";
42
43	greg	1.1	char *progname;
44
45			struct {
46	greg	1.7	char name; / file or command name */
47	greg	1.1	FILE fp; / stream pointer */
48			int xres, yres; /* picture size */
49			int xloc, yloc; /* anchor point */
50	greg	2.17	int flags; /* HASMIN, HASMAX */
51	greg	1.1	COLR thmin, thmax; /* thresholds */
52			} input[MAXFILE]; /* our input files */
53
54			int nfile; /* number of files */
55
56	greg	2.19	char ourfmt[LPICFMT+1] = PICFMT;
57	greg	1.6	int wrongformat = 0;
58	greg	1.1
59	greg	2.21	FILE *lblopen();
60			void quit();
61	greg	1.7
62	greg	2.15
63	greg	1.1	tabputs(s) /* print line preceded by a tab */
64			char *s;
65			{
66	greg	1.6	char fmt[32];
67
68	greg	2.18	if (isheadid(s))
69	gwlarson	2.20	return(0);
70	greg	2.19	if (formatval(fmt, s)) {
71			if (globmatch(ourfmt, fmt)) {
72			wrongformat = 0;
73			strcpy(ourfmt, fmt);
74			} else
75			wrongformat = 1;
76			} else {
77	greg	1.6	putc('\t', stdout);
78			fputs(s, stdout);
79			}
80	gwlarson	2.20	return(0);
81	greg	1.1	}
82
83
84			main(argc, argv)
85			int argc;
86			char *argv[];
87			{
88	greg	1.7	int ncolumns = 0;
89	greg	1.9	int autolabel = 0;
90	greg	2.11	int curcol = 0, x0 = 0, curx = 0, cury = 0, spacing = 0;
91	greg	2.17	int xsgn, ysgn;
92	greg	1.9	char *thislabel;
93	greg	1.1	int an;
94	schorsch	2.22	SET_DEFAULT_BINARY();
95			SET_FILE_BINARY(stdin);
96			SET_FILE_BINARY(stdout);
97	greg	1.1	progname = argv[0];
98
99			for (an = 1; an < argc && argv[an][0] == '-'; an++)
100			switch (argv[an][1]) {
101			case 'x':
102	greg	2.11	xsiz = atoi(argv[++an]);
103	greg	1.1	break;
104			case 'y':
105	greg	2.11	ysiz = atoi(argv[++an]);
106	greg	1.1	break;
107			case 'b':
108			setcolr(bgcolr, atof(argv[an+1]),
109			atof(argv[an+2]),
110			atof(argv[an+3]));
111			an += 3;
112			break;
113	greg	1.7	case 'a':
114			ncolumns = atoi(argv[++an]);
115			break;
116	greg	2.11	case 's':
117			spacing = atoi(argv[++an]);
118			break;
119			case 'o':
120			curx = x0 = atoi(argv[++an]);
121			cury = atoi(argv[++an]);
122			break;
123	greg	1.7	case 'l':
124	greg	1.9	switch (argv[an][2]) {
125			case 'a':
126			autolabel++;
127			break;
128			case 'h':
129			labelht = atoi(argv[++an]);
130			break;
131			case '\0':
132			goto dofiles;
133			default:
134			goto userr;
135			}
136	greg	1.7	break;
137	greg	1.1	case '\0':
138			case 't':
139			goto dofiles;
140			default:
141			goto userr;
142			}
143			dofiles:
144	greg	2.18	newheader("RADIANCE", stdout);
145	greg	2.21	fputnow(stdout);
146	greg	1.1	for (nfile = 0; an < argc; nfile++) {
147	greg	1.9	if (nfile >= MAXFILE)
148			goto toomany;
149	greg	2.6	thislabel = NULL;
150	greg	2.17	input[nfile].flags = 0;
151			xsgn = ysgn = '-';
152			while (an < argc && (argv[an][0] == '-' \|\| argv[an][0] == '+'
153			\|\| argv[an][0] == '=')) {
154	greg	1.1	switch (argv[an][1]) {
155			case 't':
156			checkthresh = 1;
157			if (argv[an][0] == '-') {
158	greg	2.17	input[nfile].flags \|= HASMIN;
159	greg	1.1	setcolr(input[nfile].thmin,
160			atof(argv[an+1]),
161			atof(argv[an+1]),
162			atof(argv[an+1]));
163	greg	2.17	} else if (argv[an][0] == '+') {
164			input[nfile].flags \|= HASMAX;
165	greg	1.1	setcolr(input[nfile].thmax,
166			atof(argv[an+1]),
167			atof(argv[an+1]),
168			atof(argv[an+1]));
169	greg	2.17	} else
170			goto userr;
171			an++;
172	greg	1.1	break;
173	greg	1.9	case 'l':
174			if (strcmp(argv[an], "-l"))
175			goto userr;
176	greg	2.17	thislabel = argv[++an];
177	greg	1.9	break;
178	greg	2.17	case '+':
179			case '-':
180			case '0':
181			if (argv[an][0] != '=')
182			goto userr;
183			xsgn = argv[an][1];
184			ysgn = argv[an][2];
185			if (ysgn != '+' && ysgn != '-' && ysgn != '0')
186			goto userr;
187			break;
188	greg	1.1	case '\0':
189			if (argv[an][0] == '-')
190			goto getfile;
191	greg	1.9	goto userr;
192	greg	1.1	default:
193			goto userr;
194			}
195	greg	2.17	an++;
196			}
197	greg	1.1	getfile:
198	greg	1.7	if (argc-an < (ncolumns ? 1 : 3))
199	greg	1.1	goto userr;
200	greg	2.6	if (autolabel && thislabel == NULL)
201			thislabel = argv[an];
202	greg	1.1	if (!strcmp(argv[an], "-")) {
203			input[nfile].name = "<stdin>";
204			input[nfile].fp = stdin;
205			} else {
206	greg	2.4	if (argv[an][0] == '!') {
207	greg	2.14	input[nfile].name = Command;
208	greg	2.4	input[nfile].fp = popen(argv[an]+1, "r");
209			} else {
210			input[nfile].name = argv[an];
211			input[nfile].fp = fopen(argv[an], "r");
212			}
213			if (input[nfile].fp == NULL) {
214	greg	1.5	perror(argv[an]);
215	greg	1.1	quit(1);
216			}
217			}
218			an++;
219			/* get header */
220			printf("%s:\n", input[nfile].name);
221	greg	1.6	getheader(input[nfile].fp, tabputs, NULL);
222			if (wrongformat) {
223	greg	2.21	fprintf(stderr, "%s: incompatible input format\n",
224	greg	1.6	input[nfile].name);
225			quit(1);
226			}
227	greg	1.1	/* get picture size */
228	greg	1.4	if (fgetresolu(&input[nfile].xres, &input[nfile].yres,
229	greg	1.10	input[nfile].fp) < 0) {
230	greg	1.1	fprintf(stderr, "%s: bad picture size\n",
231			input[nfile].name);
232			quit(1);
233			}
234	greg	1.7	if (ncolumns > 0) {
235			if (curcol >= ncolumns) {
236	greg	2.11	cury = ymax + spacing;
237			curx = x0;
238	greg	1.7	curcol = 0;
239			}
240			input[nfile].xloc = curx;
241			input[nfile].yloc = cury;
242	greg	2.11	curx += input[nfile].xres + spacing;
243	greg	1.7	curcol++;
244			} else {
245			input[nfile].xloc = atoi(argv[an++]);
246	greg	2.17	if (xsgn == '+')
247			input[nfile].xloc -= input[nfile].xres;
248			else if (xsgn == '0')
249			input[nfile].xloc -= input[nfile].xres/2;
250	greg	1.7	input[nfile].yloc = atoi(argv[an++]);
251	greg	2.17	if (ysgn == '+')
252			input[nfile].yloc -= input[nfile].yres;
253			else if (ysgn == '0')
254			input[nfile].yloc -= input[nfile].yres/2;
255	greg	1.7	}
256	greg	1.1	if (input[nfile].xloc < xmin)
257			xmin = input[nfile].xloc;
258			if (input[nfile].yloc < ymin)
259			ymin = input[nfile].yloc;
260			if (input[nfile].xloc+input[nfile].xres > xmax)
261			xmax = input[nfile].xloc+input[nfile].xres;
262			if (input[nfile].yloc+input[nfile].yres > ymax)
263			ymax = input[nfile].yloc+input[nfile].yres;
264	greg	1.9	if (thislabel != NULL) {
265			if (++nfile >= MAXFILE)
266			goto toomany;
267	greg	2.14	input[nfile].name = Label;
268	greg	2.17	input[nfile].flags = 0;
269	greg	2.7	input[nfile].xres = input[nfile-1].xres;
270			input[nfile].yres = labelht;
271	greg	1.9	if ((input[nfile].fp = lblopen(thislabel,
272			&input[nfile].xres,
273			&input[nfile].yres)) == NULL)
274	greg	1.7	goto labelerr;
275			input[nfile].xloc = input[nfile-1].xloc;
276			input[nfile].yloc = input[nfile-1].yloc +
277	greg	1.9	input[nfile-1].yres-input[nfile].yres;
278	greg	1.7	}
279	greg	1.1	}
280			if (xsiz <= 0)
281			xsiz = xmax;
282	greg	2.11	else if (xsiz > xmax)
283			xmax = xsiz;
284	greg	1.1	if (ysiz <= 0)
285			ysiz = ymax;
286	greg	2.11	else if (ysiz > ymax)
287			ymax = ysiz;
288	greg	1.1	/* add new header info. */
289			printargs(argc, argv, stdout);
290	greg	2.19	if (strcmp(ourfmt, PICFMT))
291			fputformat(ourfmt, stdout); /* print format if known */
292	greg	1.10	putchar('\n');
293			fprtresolu(xsiz, ysiz, stdout);
294	greg	1.1
295			compos();
296
297			quit(0);
298			userr:
299	greg	2.11	fprintf(stderr,
300			"Usage: %s [-x xr][-y yr][-b r g b][-a n][-s p][-o x0 y0][-la][-lh h] ",
301	greg	1.8	progname);
302	greg	2.17	fprintf(stderr, "[-t min1][+t max1][-l lab][=SS] pic1 x1 y1 ..\n");
303	greg	1.7	quit(1);
304	greg	1.9	toomany:
305			fprintf(stderr, "%s: only %d files and labels allowed\n",
306			progname, MAXFILE);
307			quit(1);
308	greg	1.7	labelerr:
309			fprintf(stderr, "%s: error opening label\n", progname);
310	greg	1.1	quit(1);
311			}
312
313
314			compos() /* composite pictures */
315			{
316			COLR scanin, scanout;
317			int y;
318			register int x, i;
319
320	greg	1.3	scanin = (COLR )malloc((xmax-xmin)sizeof(COLR));
321	greg	1.1	if (scanin == NULL)
322			goto memerr;
323			scanin -= xmin;
324			if (checkthresh) {
325			scanout = (COLR )malloc(xsizsizeof(COLR));
326			if (scanout == NULL)
327			goto memerr;
328			} else
329			scanout = scanin;
330			for (y = ymax-1; y >= 0; y--) {
331			for (x = 0; x < xsiz; x++)
332			copycolr(scanout[x], bgcolr);
333			for (i = 0; i < nfile; i++) {
334			if (input[i].yloc > y \|\|
335			input[i].yloc+input[i].yres <= y)
336			continue;
337			if (freadcolrs(scanin+input[i].xloc,
338			input[i].xres, input[i].fp) < 0) {
339	greg	1.2	fprintf(stderr, "%s: read error (y==%d)\n",
340			input[i].name,
341			y-input[i].yloc);
342	greg	1.1	quit(1);
343			}
344			if (y >= ysiz)
345			continue;
346			if (checkthresh) {
347			x = input[i].xloc+input[i].xres;
348			if (x > xsiz)
349			x = xsiz;
350			for (x--; x >= 0 && x >= input[i].xloc; x--) {
351	greg	2.17	if (input[i].flags & HASMIN &&
352	greg	1.1	cmpcolr(scanin[x], input[i].thmin) <= 0)
353			continue;
354	greg	2.17	if (input[i].flags & HASMAX &&
355	greg	1.1	cmpcolr(scanin[x], input[i].thmax) >= 0)
356			continue;
357			copycolr(scanout[x], scanin[x]);
358			}
359			}
360			}
361			if (y >= ysiz)
362			continue;
363			if (fwritecolrs(scanout, xsiz, stdout) < 0) {
364	greg	1.5	perror(progname);
365	greg	1.1	quit(1);
366			}
367			}
368			return;
369			memerr:
370	greg	1.5	perror(progname);
371	greg	1.1	quit(1);
372			}
373
374
375			int
376			cmpcolr(c1, c2) /* compare two colr's (improvisation) */
377			register COLR c1, c2;
378			{
379			register int i, j;
380
381			j = 4; /* check exponents first! */
382			while (j--)
383			if (i = c1[j] - c2[j])
384			return(i);
385			return(0);
386	greg	1.9	}
387
388
389			FILE *
390			lblopen(s, xp, yp) /* open pipe to label generator */
391			char *s;
392			int xp, yp;
393			{
394			char com[128];
395			FILE *fp;
396
397	greg	2.7	sprintf(com, "psign -s -.15 -a 2 -x %d -y %d '%.90s'", xp, yp, s);
398	greg	1.9	if ((fp = popen(com, "r")) == NULL)
399			return(NULL);
400			if (checkheader(fp, COLRFMT, NULL) < 0)
401			goto err;
402	greg	1.10	if (fgetresolu(xp, yp, fp) < 0)
403	greg	1.9	goto err;
404			return(fp);
405			err:
406			pclose(fp);
407			return(NULL);
408	greg	1.1	}
409
410
411	greg	2.21	void
412	greg	1.1	quit(code) /* exit gracefully */
413			int code;
414			{
415	greg	2.13	register int i;
416			/* close input files */
417			for (i = 0; i < nfile; i++)
418	greg	2.14	if (input[i].name == Command \|\| input[i].name == Label)
419			pclose(input[i].fp);
420			else
421			fclose(input[i].fp);
422	greg	1.1	exit(code);
423			}