src/px/pcompos.c

#ifndef lint
static const char       RCSid[] = "$Id: pcompos.c,v 2.29 2004/03/28 20:33:14 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  "rtprocess.h"
#include  "rterror.h"
#include  "color.h"
#include  "resolu.h"

#define  MAXFILE        512

#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  StandardInput[] = "<stdin>";
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;


static gethfunc tabputs;
static void compos(void);
static int cmpcolr(COLR  c1, COLR  c2);
static FILE * lblopen(char  *s, int  *xp, int  *yp);


static int
tabputs(                        /* print line preceded by a tab */
        char    *s,
        void    *p
)
{
        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);
}


int
main(
        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 = StandardInput;
                        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);
        return 1; /* pro forma return */
}


static void
compos(void)                            /* 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);
                }
        }
                                        /* read remainders from streams */
        for (i = 0; i < nfile; i++)
                if (input[i].name[0] == '<')
                        while (getc(input[i].fp) != EOF)
                                ;
        return;
memerr:
        perror(progname);
        quit(1);
}


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

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


static FILE *
lblopen(                /* open pipe to label generator */
        char  *s,
        int  *xp,
        int  *yp
)
{
        char  com[PATH_MAX];
        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:	2.30
Committed:	Wed May 25 04:44:26 2005 UTC (18 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R7P2, rad3R7P1
Changes since 2.29:	+2 -2 lines
Log Message:	Created rtcontrib program for computing ray contributions and coefficients
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.30	static const char RCSid[] = "$Id: pcompos.c,v 2.29 2004/03/28 20:33:14 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	schorsch	2.25	#include "rtprocess.h"
19	schorsch	2.29	#include "rterror.h"
20	greg	1.1	#include "color.h"
21	greg	1.10	#include "resolu.h"
22	greg	1.1
23	greg	2.30	#define MAXFILE 512
24	greg	1.1
25	greg	2.17	#define HASMIN 1
26			#define HASMAX 2
27
28	greg	1.1	/* output picture size */
29			int xsiz = 0;
30			int ysiz = 0;
31			/* input dimensions */
32			int xmin = 0;
33			int ymin = 0;
34			int xmax = 0;
35			int ymax = 0;
36
37			COLR bgcolr = BLKCOLR; /* background color */
38
39	greg	1.9	int labelht = 24; /* label height */
40
41	greg	1.1	int checkthresh = 0; /* check threshold value */
42
43	greg	2.28	char StandardInput[] = "<stdin>";
44	greg	2.14	char Command[] = "<Command>";
45			char Label[] = "<Label>";
46
47	greg	1.1	char *progname;
48
49			struct {
50	greg	1.7	char name; / file or command name */
51	greg	1.1	FILE fp; / stream pointer */
52			int xres, yres; /* picture size */
53			int xloc, yloc; /* anchor point */
54	greg	2.17	int flags; /* HASMIN, HASMAX */
55	greg	1.1	COLR thmin, thmax; /* thresholds */
56			} input[MAXFILE]; /* our input files */
57
58			int nfile; /* number of files */
59
60	greg	2.19	char ourfmt[LPICFMT+1] = PICFMT;
61	greg	1.6	int wrongformat = 0;
62	greg	1.1
63	greg	1.7
64	schorsch	2.27	static gethfunc tabputs;
65	schorsch	2.29	static void compos(void);
66			static int cmpcolr(COLR c1, COLR c2);
67			static FILE * lblopen(char s, int xp, int *yp);
68
69	greg	2.15
70	schorsch	2.27
71			static int
72			tabputs( /* print line preceded by a tab */
73			char *s,
74			void *p
75			)
76	greg	1.1	{
77	greg	1.6	char fmt[32];
78
79	greg	2.18	if (isheadid(s))
80	gwlarson	2.20	return(0);
81	greg	2.19	if (formatval(fmt, s)) {
82			if (globmatch(ourfmt, fmt)) {
83			wrongformat = 0;
84			strcpy(ourfmt, fmt);
85			} else
86			wrongformat = 1;
87			} else {
88	greg	1.6	putc('\t', stdout);
89			fputs(s, stdout);
90			}
91	gwlarson	2.20	return(0);
92	greg	1.1	}
93
94
95	schorsch	2.29	int
96			main(
97			int argc,
98			char *argv[]
99			)
100	greg	1.1	{
101	greg	1.7	int ncolumns = 0;
102	greg	1.9	int autolabel = 0;
103	greg	2.11	int curcol = 0, x0 = 0, curx = 0, cury = 0, spacing = 0;
104	greg	2.17	int xsgn, ysgn;
105	greg	1.9	char *thislabel;
106	greg	1.1	int an;
107	schorsch	2.22	SET_DEFAULT_BINARY();
108			SET_FILE_BINARY(stdin);
109			SET_FILE_BINARY(stdout);
110	greg	1.1	progname = argv[0];
111
112			for (an = 1; an < argc && argv[an][0] == '-'; an++)
113			switch (argv[an][1]) {
114			case 'x':
115	greg	2.11	xsiz = atoi(argv[++an]);
116	greg	1.1	break;
117			case 'y':
118	greg	2.11	ysiz = atoi(argv[++an]);
119	greg	1.1	break;
120			case 'b':
121			setcolr(bgcolr, atof(argv[an+1]),
122			atof(argv[an+2]),
123			atof(argv[an+3]));
124			an += 3;
125			break;
126	greg	1.7	case 'a':
127			ncolumns = atoi(argv[++an]);
128			break;
129	greg	2.11	case 's':
130			spacing = atoi(argv[++an]);
131			break;
132			case 'o':
133			curx = x0 = atoi(argv[++an]);
134			cury = atoi(argv[++an]);
135			break;
136	greg	1.7	case 'l':
137	greg	1.9	switch (argv[an][2]) {
138			case 'a':
139			autolabel++;
140			break;
141			case 'h':
142			labelht = atoi(argv[++an]);
143			break;
144			case '\0':
145			goto dofiles;
146			default:
147			goto userr;
148			}
149	greg	1.7	break;
150	greg	1.1	case '\0':
151			case 't':
152			goto dofiles;
153			default:
154			goto userr;
155			}
156			dofiles:
157	greg	2.18	newheader("RADIANCE", stdout);
158	greg	2.21	fputnow(stdout);
159	greg	1.1	for (nfile = 0; an < argc; nfile++) {
160	greg	1.9	if (nfile >= MAXFILE)
161			goto toomany;
162	greg	2.6	thislabel = NULL;
163	greg	2.17	input[nfile].flags = 0;
164			xsgn = ysgn = '-';
165			while (an < argc && (argv[an][0] == '-' \|\| argv[an][0] == '+'
166			\|\| argv[an][0] == '=')) {
167	greg	1.1	switch (argv[an][1]) {
168			case 't':
169			checkthresh = 1;
170			if (argv[an][0] == '-') {
171	greg	2.17	input[nfile].flags \|= HASMIN;
172	greg	1.1	setcolr(input[nfile].thmin,
173			atof(argv[an+1]),
174			atof(argv[an+1]),
175			atof(argv[an+1]));
176	greg	2.17	} else if (argv[an][0] == '+') {
177			input[nfile].flags \|= HASMAX;
178	greg	1.1	setcolr(input[nfile].thmax,
179			atof(argv[an+1]),
180			atof(argv[an+1]),
181			atof(argv[an+1]));
182	greg	2.17	} else
183			goto userr;
184			an++;
185	greg	1.1	break;
186	greg	1.9	case 'l':
187			if (strcmp(argv[an], "-l"))
188			goto userr;
189	greg	2.17	thislabel = argv[++an];
190	greg	1.9	break;
191	greg	2.17	case '+':
192			case '-':
193			case '0':
194			if (argv[an][0] != '=')
195			goto userr;
196			xsgn = argv[an][1];
197			ysgn = argv[an][2];
198			if (ysgn != '+' && ysgn != '-' && ysgn != '0')
199			goto userr;
200			break;
201	greg	1.1	case '\0':
202			if (argv[an][0] == '-')
203			goto getfile;
204	greg	1.9	goto userr;
205	greg	1.1	default:
206			goto userr;
207			}
208	greg	2.17	an++;
209			}
210	greg	1.1	getfile:
211	greg	1.7	if (argc-an < (ncolumns ? 1 : 3))
212	greg	1.1	goto userr;
213	greg	2.6	if (autolabel && thislabel == NULL)
214			thislabel = argv[an];
215	greg	1.1	if (!strcmp(argv[an], "-")) {
216	greg	2.28	input[nfile].name = StandardInput;
217	greg	1.1	input[nfile].fp = stdin;
218			} else {
219	greg	2.4	if (argv[an][0] == '!') {
220	greg	2.14	input[nfile].name = Command;
221	greg	2.4	input[nfile].fp = popen(argv[an]+1, "r");
222			} else {
223			input[nfile].name = argv[an];
224			input[nfile].fp = fopen(argv[an], "r");
225			}
226			if (input[nfile].fp == NULL) {
227	greg	1.5	perror(argv[an]);
228	greg	1.1	quit(1);
229			}
230			}
231			an++;
232			/* get header */
233			printf("%s:\n", input[nfile].name);
234	greg	1.6	getheader(input[nfile].fp, tabputs, NULL);
235			if (wrongformat) {
236	greg	2.21	fprintf(stderr, "%s: incompatible input format\n",
237	greg	1.6	input[nfile].name);
238			quit(1);
239			}
240	greg	1.1	/* get picture size */
241	greg	1.4	if (fgetresolu(&input[nfile].xres, &input[nfile].yres,
242	greg	1.10	input[nfile].fp) < 0) {
243	greg	1.1	fprintf(stderr, "%s: bad picture size\n",
244			input[nfile].name);
245			quit(1);
246			}
247	greg	1.7	if (ncolumns > 0) {
248			if (curcol >= ncolumns) {
249	greg	2.11	cury = ymax + spacing;
250			curx = x0;
251	greg	1.7	curcol = 0;
252			}
253			input[nfile].xloc = curx;
254			input[nfile].yloc = cury;
255	greg	2.11	curx += input[nfile].xres + spacing;
256	greg	1.7	curcol++;
257			} else {
258			input[nfile].xloc = atoi(argv[an++]);
259	greg	2.17	if (xsgn == '+')
260			input[nfile].xloc -= input[nfile].xres;
261			else if (xsgn == '0')
262			input[nfile].xloc -= input[nfile].xres/2;
263	greg	1.7	input[nfile].yloc = atoi(argv[an++]);
264	greg	2.17	if (ysgn == '+')
265			input[nfile].yloc -= input[nfile].yres;
266			else if (ysgn == '0')
267			input[nfile].yloc -= input[nfile].yres/2;
268	greg	1.7	}
269	greg	1.1	if (input[nfile].xloc < xmin)
270			xmin = input[nfile].xloc;
271			if (input[nfile].yloc < ymin)
272			ymin = input[nfile].yloc;
273			if (input[nfile].xloc+input[nfile].xres > xmax)
274			xmax = input[nfile].xloc+input[nfile].xres;
275			if (input[nfile].yloc+input[nfile].yres > ymax)
276			ymax = input[nfile].yloc+input[nfile].yres;
277	greg	1.9	if (thislabel != NULL) {
278			if (++nfile >= MAXFILE)
279			goto toomany;
280	greg	2.14	input[nfile].name = Label;
281	greg	2.17	input[nfile].flags = 0;
282	greg	2.7	input[nfile].xres = input[nfile-1].xres;
283			input[nfile].yres = labelht;
284	greg	1.9	if ((input[nfile].fp = lblopen(thislabel,
285			&input[nfile].xres,
286			&input[nfile].yres)) == NULL)
287	greg	1.7	goto labelerr;
288			input[nfile].xloc = input[nfile-1].xloc;
289			input[nfile].yloc = input[nfile-1].yloc +
290	greg	1.9	input[nfile-1].yres-input[nfile].yres;
291	greg	1.7	}
292	greg	1.1	}
293			if (xsiz <= 0)
294			xsiz = xmax;
295	greg	2.11	else if (xsiz > xmax)
296			xmax = xsiz;
297	greg	1.1	if (ysiz <= 0)
298			ysiz = ymax;
299	greg	2.11	else if (ysiz > ymax)
300			ymax = ysiz;
301	greg	1.1	/* add new header info. */
302			printargs(argc, argv, stdout);
303	greg	2.19	if (strcmp(ourfmt, PICFMT))
304			fputformat(ourfmt, stdout); /* print format if known */
305	greg	1.10	putchar('\n');
306			fprtresolu(xsiz, ysiz, stdout);
307	greg	1.1
308			compos();
309
310			quit(0);
311			userr:
312	greg	2.11	fprintf(stderr,
313			"Usage: %s [-x xr][-y yr][-b r g b][-a n][-s p][-o x0 y0][-la][-lh h] ",
314	greg	1.8	progname);
315	greg	2.17	fprintf(stderr, "[-t min1][+t max1][-l lab][=SS] pic1 x1 y1 ..\n");
316	greg	1.7	quit(1);
317	greg	1.9	toomany:
318			fprintf(stderr, "%s: only %d files and labels allowed\n",
319			progname, MAXFILE);
320			quit(1);
321	greg	1.7	labelerr:
322			fprintf(stderr, "%s: error opening label\n", progname);
323	greg	1.1	quit(1);
324	schorsch	2.29	return 1; /* pro forma return */
325	greg	1.1	}
326
327
328	schorsch	2.29	static void
329			compos(void) /* composite pictures */
330	greg	1.1	{
331			COLR scanin, scanout;
332			int y;
333			register int x, i;
334
335	greg	1.3	scanin = (COLR )malloc((xmax-xmin)sizeof(COLR));
336	greg	1.1	if (scanin == NULL)
337			goto memerr;
338			scanin -= xmin;
339			if (checkthresh) {
340			scanout = (COLR )malloc(xsizsizeof(COLR));
341			if (scanout == NULL)
342			goto memerr;
343			} else
344			scanout = scanin;
345			for (y = ymax-1; y >= 0; y--) {
346			for (x = 0; x < xsiz; x++)
347			copycolr(scanout[x], bgcolr);
348			for (i = 0; i < nfile; i++) {
349			if (input[i].yloc > y \|\|
350			input[i].yloc+input[i].yres <= y)
351			continue;
352			if (freadcolrs(scanin+input[i].xloc,
353			input[i].xres, input[i].fp) < 0) {
354	greg	1.2	fprintf(stderr, "%s: read error (y==%d)\n",
355			input[i].name,
356			y-input[i].yloc);
357	greg	1.1	quit(1);
358			}
359			if (y >= ysiz)
360			continue;
361			if (checkthresh) {
362			x = input[i].xloc+input[i].xres;
363			if (x > xsiz)
364			x = xsiz;
365			for (x--; x >= 0 && x >= input[i].xloc; x--) {
366	greg	2.17	if (input[i].flags & HASMIN &&
367	greg	1.1	cmpcolr(scanin[x], input[i].thmin) <= 0)
368			continue;
369	greg	2.17	if (input[i].flags & HASMAX &&
370	greg	1.1	cmpcolr(scanin[x], input[i].thmax) >= 0)
371			continue;
372			copycolr(scanout[x], scanin[x]);
373			}
374			}
375			}
376			if (y >= ysiz)
377			continue;
378			if (fwritecolrs(scanout, xsiz, stdout) < 0) {
379	greg	1.5	perror(progname);
380	greg	1.1	quit(1);
381			}
382			}
383	greg	2.28	/* read remainders from streams */
384			for (i = 0; i < nfile; i++)
385			if (input[i].name[0] == '<')
386			while (getc(input[i].fp) != EOF)
387			;
388	greg	1.1	return;
389			memerr:
390	greg	1.5	perror(progname);
391	greg	1.1	quit(1);
392			}
393
394
395	schorsch	2.29	static int
396			cmpcolr( /* compare two colr's (improvisation) */
397			register COLR c1,
398			register COLR c2
399			)
400	greg	1.1	{
401			register int i, j;
402
403			j = 4; /* check exponents first! */
404			while (j--)
405	schorsch	2.24	if ( (i = c1[j] - c2[j]) )
406	greg	1.1	return(i);
407			return(0);
408	greg	1.9	}
409
410
411	schorsch	2.29	static FILE *
412			lblopen( /* open pipe to label generator */
413			char *s,
414			int *xp,
415			int *yp
416			)
417	greg	1.9	{
418	schorsch	2.26	char com[PATH_MAX];
419	greg	1.9	FILE *fp;
420
421	greg	2.7	sprintf(com, "psign -s -.15 -a 2 -x %d -y %d '%.90s'", xp, yp, s);
422	greg	1.9	if ((fp = popen(com, "r")) == NULL)
423			return(NULL);
424			if (checkheader(fp, COLRFMT, NULL) < 0)
425			goto err;
426	greg	1.10	if (fgetresolu(xp, yp, fp) < 0)
427	greg	1.9	goto err;
428			return(fp);
429			err:
430			pclose(fp);
431			return(NULL);
432	greg	1.1	}
433
434
435	greg	2.21	void
436	greg	1.1	quit(code) /* exit gracefully */
437			int code;
438			{
439	greg	2.13	register int i;
440			/* close input files */
441			for (i = 0; i < nfile; i++)
442	greg	2.14	if (input[i].name == Command \|\| input[i].name == Label)
443			pclose(input[i].fp);
444			else
445			fclose(input[i].fp);
446	greg	1.1	exit(code);
447			}