src/px/pcompos.c

#ifndef lint
static const char       RCSid[] = "$Id: pcompos.c,v 2.23 2003/07/03 22:41:44 schorsch Exp $";
#endif
/*
 *  pcompos.c - program to composite pictures.
 *
 *     6/30/87
 */

#include  <stdio.h>
#include  <math.h>
#include  <time.h>
#include  <string.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:	2.24
Committed:	Sun Jul 27 22:12:03 2003 UTC (20 years, 9 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.23:	+2 -2 lines
Log Message:	Added grouping parens to reduce ambiguity warnings.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.24	static const char RCSid[] = "$Id: pcompos.c,v 2.23 2003/07/03 22:41:44 schorsch 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	schorsch	2.23	#include <string.h>
14	greg	2.16
15	schorsch	2.22	#include "copyright.h"
16	greg	2.21
17	schorsch	2.22	#include "platform.h"
18	greg	1.1	#include "color.h"
19	greg	1.10	#include "resolu.h"
20	greg	1.1
21	greg	2.15	#define MAXFILE 64
22	greg	1.1
23	greg	2.17	#define HASMIN 1
24			#define HASMAX 2
25
26	greg	1.1	/* output picture size */
27			int xsiz = 0;
28			int ysiz = 0;
29			/* input dimensions */
30			int xmin = 0;
31			int ymin = 0;
32			int xmax = 0;
33			int ymax = 0;
34
35			COLR bgcolr = BLKCOLR; /* background color */
36
37	greg	1.9	int labelht = 24; /* label height */
38
39	greg	1.1	int checkthresh = 0; /* check threshold value */
40
41	greg	2.14	char Command[] = "<Command>";
42			char Label[] = "<Label>";
43
44	greg	1.1	char *progname;
45
46			struct {
47	greg	1.7	char name; / file or command name */
48	greg	1.1	FILE fp; / stream pointer */
49			int xres, yres; /* picture size */
50			int xloc, yloc; /* anchor point */
51	greg	2.17	int flags; /* HASMIN, HASMAX */
52	greg	1.1	COLR thmin, thmax; /* thresholds */
53			} input[MAXFILE]; /* our input files */
54
55			int nfile; /* number of files */
56
57	greg	2.19	char ourfmt[LPICFMT+1] = PICFMT;
58	greg	1.6	int wrongformat = 0;
59	greg	1.1
60	greg	2.21	FILE *lblopen();
61			void quit();
62	greg	1.7
63	greg	2.15
64	greg	1.1	tabputs(s) /* print line preceded by a tab */
65			char *s;
66			{
67	greg	1.6	char fmt[32];
68
69	greg	2.18	if (isheadid(s))
70	gwlarson	2.20	return(0);
71	greg	2.19	if (formatval(fmt, s)) {
72			if (globmatch(ourfmt, fmt)) {
73			wrongformat = 0;
74			strcpy(ourfmt, fmt);
75			} else
76			wrongformat = 1;
77			} else {
78	greg	1.6	putc('\t', stdout);
79			fputs(s, stdout);
80			}
81	gwlarson	2.20	return(0);
82	greg	1.1	}
83
84
85			main(argc, argv)
86			int argc;
87			char *argv[];
88			{
89	greg	1.7	int ncolumns = 0;
90	greg	1.9	int autolabel = 0;
91	greg	2.11	int curcol = 0, x0 = 0, curx = 0, cury = 0, spacing = 0;
92	greg	2.17	int xsgn, ysgn;
93	greg	1.9	char *thislabel;
94	greg	1.1	int an;
95	schorsch	2.22	SET_DEFAULT_BINARY();
96			SET_FILE_BINARY(stdin);
97			SET_FILE_BINARY(stdout);
98	greg	1.1	progname = argv[0];
99
100			for (an = 1; an < argc && argv[an][0] == '-'; an++)
101			switch (argv[an][1]) {
102			case 'x':
103	greg	2.11	xsiz = atoi(argv[++an]);
104	greg	1.1	break;
105			case 'y':
106	greg	2.11	ysiz = atoi(argv[++an]);
107	greg	1.1	break;
108			case 'b':
109			setcolr(bgcolr, atof(argv[an+1]),
110			atof(argv[an+2]),
111			atof(argv[an+3]));
112			an += 3;
113			break;
114	greg	1.7	case 'a':
115			ncolumns = atoi(argv[++an]);
116			break;
117	greg	2.11	case 's':
118			spacing = atoi(argv[++an]);
119			break;
120			case 'o':
121			curx = x0 = atoi(argv[++an]);
122			cury = atoi(argv[++an]);
123			break;
124	greg	1.7	case 'l':
125	greg	1.9	switch (argv[an][2]) {
126			case 'a':
127			autolabel++;
128			break;
129			case 'h':
130			labelht = atoi(argv[++an]);
131			break;
132			case '\0':
133			goto dofiles;
134			default:
135			goto userr;
136			}
137	greg	1.7	break;
138	greg	1.1	case '\0':
139			case 't':
140			goto dofiles;
141			default:
142			goto userr;
143			}
144			dofiles:
145	greg	2.18	newheader("RADIANCE", stdout);
146	greg	2.21	fputnow(stdout);
147	greg	1.1	for (nfile = 0; an < argc; nfile++) {
148	greg	1.9	if (nfile >= MAXFILE)
149			goto toomany;
150	greg	2.6	thislabel = NULL;
151	greg	2.17	input[nfile].flags = 0;
152			xsgn = ysgn = '-';
153			while (an < argc && (argv[an][0] == '-' \|\| argv[an][0] == '+'
154			\|\| argv[an][0] == '=')) {
155	greg	1.1	switch (argv[an][1]) {
156			case 't':
157			checkthresh = 1;
158			if (argv[an][0] == '-') {
159	greg	2.17	input[nfile].flags \|= HASMIN;
160	greg	1.1	setcolr(input[nfile].thmin,
161			atof(argv[an+1]),
162			atof(argv[an+1]),
163			atof(argv[an+1]));
164	greg	2.17	} else if (argv[an][0] == '+') {
165			input[nfile].flags \|= HASMAX;
166	greg	1.1	setcolr(input[nfile].thmax,
167			atof(argv[an+1]),
168			atof(argv[an+1]),
169			atof(argv[an+1]));
170	greg	2.17	} else
171			goto userr;
172			an++;
173	greg	1.1	break;
174	greg	1.9	case 'l':
175			if (strcmp(argv[an], "-l"))
176			goto userr;
177	greg	2.17	thislabel = argv[++an];
178	greg	1.9	break;
179	greg	2.17	case '+':
180			case '-':
181			case '0':
182			if (argv[an][0] != '=')
183			goto userr;
184			xsgn = argv[an][1];
185			ysgn = argv[an][2];
186			if (ysgn != '+' && ysgn != '-' && ysgn != '0')
187			goto userr;
188			break;
189	greg	1.1	case '\0':
190			if (argv[an][0] == '-')
191			goto getfile;
192	greg	1.9	goto userr;
193	greg	1.1	default:
194			goto userr;
195			}
196	greg	2.17	an++;
197			}
198	greg	1.1	getfile:
199	greg	1.7	if (argc-an < (ncolumns ? 1 : 3))
200	greg	1.1	goto userr;
201	greg	2.6	if (autolabel && thislabel == NULL)
202			thislabel = argv[an];
203	greg	1.1	if (!strcmp(argv[an], "-")) {
204			input[nfile].name = "<stdin>";
205			input[nfile].fp = stdin;
206			} else {
207	greg	2.4	if (argv[an][0] == '!') {
208	greg	2.14	input[nfile].name = Command;
209	greg	2.4	input[nfile].fp = popen(argv[an]+1, "r");
210			} else {
211			input[nfile].name = argv[an];
212			input[nfile].fp = fopen(argv[an], "r");
213			}
214			if (input[nfile].fp == NULL) {
215	greg	1.5	perror(argv[an]);
216	greg	1.1	quit(1);
217			}
218			}
219			an++;
220			/* get header */
221			printf("%s:\n", input[nfile].name);
222	greg	1.6	getheader(input[nfile].fp, tabputs, NULL);
223			if (wrongformat) {
224	greg	2.21	fprintf(stderr, "%s: incompatible input format\n",
225	greg	1.6	input[nfile].name);
226			quit(1);
227			}
228	greg	1.1	/* get picture size */
229	greg	1.4	if (fgetresolu(&input[nfile].xres, &input[nfile].yres,
230	greg	1.10	input[nfile].fp) < 0) {
231	greg	1.1	fprintf(stderr, "%s: bad picture size\n",
232			input[nfile].name);
233			quit(1);
234			}
235	greg	1.7	if (ncolumns > 0) {
236			if (curcol >= ncolumns) {
237	greg	2.11	cury = ymax + spacing;
238			curx = x0;
239	greg	1.7	curcol = 0;
240			}
241			input[nfile].xloc = curx;
242			input[nfile].yloc = cury;
243	greg	2.11	curx += input[nfile].xres + spacing;
244	greg	1.7	curcol++;
245			} else {
246			input[nfile].xloc = atoi(argv[an++]);
247	greg	2.17	if (xsgn == '+')
248			input[nfile].xloc -= input[nfile].xres;
249			else if (xsgn == '0')
250			input[nfile].xloc -= input[nfile].xres/2;
251	greg	1.7	input[nfile].yloc = atoi(argv[an++]);
252	greg	2.17	if (ysgn == '+')
253			input[nfile].yloc -= input[nfile].yres;
254			else if (ysgn == '0')
255			input[nfile].yloc -= input[nfile].yres/2;
256	greg	1.7	}
257	greg	1.1	if (input[nfile].xloc < xmin)
258			xmin = input[nfile].xloc;
259			if (input[nfile].yloc < ymin)
260			ymin = input[nfile].yloc;
261			if (input[nfile].xloc+input[nfile].xres > xmax)
262			xmax = input[nfile].xloc+input[nfile].xres;
263			if (input[nfile].yloc+input[nfile].yres > ymax)
264			ymax = input[nfile].yloc+input[nfile].yres;
265	greg	1.9	if (thislabel != NULL) {
266			if (++nfile >= MAXFILE)
267			goto toomany;
268	greg	2.14	input[nfile].name = Label;
269	greg	2.17	input[nfile].flags = 0;
270	greg	2.7	input[nfile].xres = input[nfile-1].xres;
271			input[nfile].yres = labelht;
272	greg	1.9	if ((input[nfile].fp = lblopen(thislabel,
273			&input[nfile].xres,
274			&input[nfile].yres)) == NULL)
275	greg	1.7	goto labelerr;
276			input[nfile].xloc = input[nfile-1].xloc;
277			input[nfile].yloc = input[nfile-1].yloc +
278	greg	1.9	input[nfile-1].yres-input[nfile].yres;
279	greg	1.7	}
280	greg	1.1	}
281			if (xsiz <= 0)
282			xsiz = xmax;
283	greg	2.11	else if (xsiz > xmax)
284			xmax = xsiz;
285	greg	1.1	if (ysiz <= 0)
286			ysiz = ymax;
287	greg	2.11	else if (ysiz > ymax)
288			ymax = ysiz;
289	greg	1.1	/* add new header info. */
290			printargs(argc, argv, stdout);
291	greg	2.19	if (strcmp(ourfmt, PICFMT))
292			fputformat(ourfmt, stdout); /* print format if known */
293	greg	1.10	putchar('\n');
294			fprtresolu(xsiz, ysiz, stdout);
295	greg	1.1
296			compos();
297
298			quit(0);
299			userr:
300	greg	2.11	fprintf(stderr,
301			"Usage: %s [-x xr][-y yr][-b r g b][-a n][-s p][-o x0 y0][-la][-lh h] ",
302	greg	1.8	progname);
303	greg	2.17	fprintf(stderr, "[-t min1][+t max1][-l lab][=SS] pic1 x1 y1 ..\n");
304	greg	1.7	quit(1);
305	greg	1.9	toomany:
306			fprintf(stderr, "%s: only %d files and labels allowed\n",
307			progname, MAXFILE);
308			quit(1);
309	greg	1.7	labelerr:
310			fprintf(stderr, "%s: error opening label\n", progname);
311	greg	1.1	quit(1);
312			}
313
314
315			compos() /* composite pictures */
316			{
317			COLR scanin, scanout;
318			int y;
319			register int x, i;
320
321	greg	1.3	scanin = (COLR )malloc((xmax-xmin)sizeof(COLR));
322	greg	1.1	if (scanin == NULL)
323			goto memerr;
324			scanin -= xmin;
325			if (checkthresh) {
326			scanout = (COLR )malloc(xsizsizeof(COLR));
327			if (scanout == NULL)
328			goto memerr;
329			} else
330			scanout = scanin;
331			for (y = ymax-1; y >= 0; y--) {
332			for (x = 0; x < xsiz; x++)
333			copycolr(scanout[x], bgcolr);
334			for (i = 0; i < nfile; i++) {
335			if (input[i].yloc > y \|\|
336			input[i].yloc+input[i].yres <= y)
337			continue;
338			if (freadcolrs(scanin+input[i].xloc,
339			input[i].xres, input[i].fp) < 0) {
340	greg	1.2	fprintf(stderr, "%s: read error (y==%d)\n",
341			input[i].name,
342			y-input[i].yloc);
343	greg	1.1	quit(1);
344			}
345			if (y >= ysiz)
346			continue;
347			if (checkthresh) {
348			x = input[i].xloc+input[i].xres;
349			if (x > xsiz)
350			x = xsiz;
351			for (x--; x >= 0 && x >= input[i].xloc; x--) {
352	greg	2.17	if (input[i].flags & HASMIN &&
353	greg	1.1	cmpcolr(scanin[x], input[i].thmin) <= 0)
354			continue;
355	greg	2.17	if (input[i].flags & HASMAX &&
356	greg	1.1	cmpcolr(scanin[x], input[i].thmax) >= 0)
357			continue;
358			copycolr(scanout[x], scanin[x]);
359			}
360			}
361			}
362			if (y >= ysiz)
363			continue;
364			if (fwritecolrs(scanout, xsiz, stdout) < 0) {
365	greg	1.5	perror(progname);
366	greg	1.1	quit(1);
367			}
368			}
369			return;
370			memerr:
371	greg	1.5	perror(progname);
372	greg	1.1	quit(1);
373			}
374
375
376			int
377			cmpcolr(c1, c2) /* compare two colr's (improvisation) */
378			register COLR c1, c2;
379			{
380			register int i, j;
381
382			j = 4; /* check exponents first! */
383			while (j--)
384	schorsch	2.24	if ( (i = c1[j] - c2[j]) )
385	greg	1.1	return(i);
386			return(0);
387	greg	1.9	}
388
389
390			FILE *
391			lblopen(s, xp, yp) /* open pipe to label generator */
392			char *s;
393			int xp, yp;
394			{
395			char com[128];
396			FILE *fp;
397
398	greg	2.7	sprintf(com, "psign -s -.15 -a 2 -x %d -y %d '%.90s'", xp, yp, s);
399	greg	1.9	if ((fp = popen(com, "r")) == NULL)
400			return(NULL);
401			if (checkheader(fp, COLRFMT, NULL) < 0)
402			goto err;
403	greg	1.10	if (fgetresolu(xp, yp, fp) < 0)
404	greg	1.9	goto err;
405			return(fp);
406			err:
407			pclose(fp);
408			return(NULL);
409	greg	1.1	}
410
411
412	greg	2.21	void
413	greg	1.1	quit(code) /* exit gracefully */
414			int code;
415			{
416	greg	2.13	register int i;
417			/* close input files */
418			for (i = 0; i < nfile; i++)
419	greg	2.14	if (input[i].name == Command \|\| input[i].name == Label)
420			pclose(input[i].fp);
421			else
422			fclose(input[i].fp);
423	greg	1.1	exit(code);
424			}