src/px/pcompos.c

#ifndef lint
static const char       RCSid[] = "$Id: pcompos.c,v 2.33 2009/08/10 04:26:38 greg 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        1024

#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 */
        double  thmin, thmax;           /* thresholds */
} input[MAXFILE];               /* our input files */

int  nfile;                     /* number of files */

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


static gethfunc headline;
static void compos(void);
static int cmpcolr(COLR  c1, double lv2);
static FILE * lblopen(char  *s, int  *xp, int  *yp);


static int
headline(                       /* 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 if (echoheader) {
                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 'h':
                        echoheader = !echoheader;
                        break;
                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;
                                        input[nfile].thmin = atof(argv[an+1]);
                                } else if (argv[an][0] == '+') {
                                        input[nfile].flags |= HASMAX;
                                        input[nfile].thmax = 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 */
                if (echoheader)
                        printf("%s:\n", input[nfile].name);
                getheader(input[nfile].fp, headline, 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) {
                        if (curcol >= abs(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;
        if (ncolumns < 0) {             /* reverse rows if requested */
                int     i = nfile;
                while (i--)
                        input[i].yloc = ymax - input[i].yres - input[i].yloc;
        }
                                        /* 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 [-h][-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 COLR to luminance */
        register COLR  c1,
        double lv2
)
{
        double  lv1 = .0;
        
        if (c1[EXP])
                lv1 = ldexp((double)normbright(c1), (int)c1[EXP]-(COLXS+8));
        if (lv1 < lv2) return(-1);
        if (lv1 > lv2) return(1);
        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:	2.34
Committed:	Thu Jun 4 01:19:30 2015 UTC (8 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R0
Changes since 2.33:	+8 -3 lines
Log Message:	Added Roland and Andreas' request to place images using -a from top-left
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.34	static const char RCSid[] = "$Id: pcompos.c,v 2.33 2009/08/10 04:26:38 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	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	2.33	#define MAXFILE 1024
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	2.31	double thmin, thmax; /* thresholds */
56	greg	1.1	} input[MAXFILE]; /* our input files */
57
58			int nfile; /* number of files */
59
60	greg	2.32	int echoheader = 1;
61	greg	2.19	char ourfmt[LPICFMT+1] = PICFMT;
62	greg	1.6	int wrongformat = 0;
63	greg	1.1
64	greg	1.7
65	greg	2.32	static gethfunc headline;
66	schorsch	2.29	static void compos(void);
67	greg	2.31	static int cmpcolr(COLR c1, double lv2);
68	schorsch	2.29	static FILE * lblopen(char s, int xp, int *yp);
69
70	greg	2.15
71	schorsch	2.27
72			static int
73	greg	2.32	headline( /* print line preceded by a tab */
74	schorsch	2.27	char *s,
75			void *p
76			)
77	greg	1.1	{
78	greg	1.6	char fmt[32];
79
80	greg	2.18	if (isheadid(s))
81	gwlarson	2.20	return(0);
82	greg	2.19	if (formatval(fmt, s)) {
83			if (globmatch(ourfmt, fmt)) {
84			wrongformat = 0;
85			strcpy(ourfmt, fmt);
86			} else
87			wrongformat = 1;
88	greg	2.32	} else if (echoheader) {
89	greg	1.6	putc('\t', stdout);
90			fputs(s, stdout);
91			}
92	gwlarson	2.20	return(0);
93	greg	1.1	}
94
95
96	schorsch	2.29	int
97			main(
98			int argc,
99			char *argv[]
100			)
101	greg	1.1	{
102	greg	1.7	int ncolumns = 0;
103	greg	1.9	int autolabel = 0;
104	greg	2.11	int curcol = 0, x0 = 0, curx = 0, cury = 0, spacing = 0;
105	greg	2.17	int xsgn, ysgn;
106	greg	1.9	char *thislabel;
107	greg	1.1	int an;
108	schorsch	2.22	SET_DEFAULT_BINARY();
109			SET_FILE_BINARY(stdin);
110			SET_FILE_BINARY(stdout);
111	greg	1.1	progname = argv[0];
112
113			for (an = 1; an < argc && argv[an][0] == '-'; an++)
114			switch (argv[an][1]) {
115	greg	2.32	case 'h':
116			echoheader = !echoheader;
117			break;
118	greg	1.1	case 'x':
119	greg	2.11	xsiz = atoi(argv[++an]);
120	greg	1.1	break;
121			case 'y':
122	greg	2.11	ysiz = atoi(argv[++an]);
123	greg	1.1	break;
124			case 'b':
125			setcolr(bgcolr, atof(argv[an+1]),
126			atof(argv[an+2]),
127			atof(argv[an+3]));
128			an += 3;
129			break;
130	greg	1.7	case 'a':
131			ncolumns = atoi(argv[++an]);
132			break;
133	greg	2.11	case 's':
134			spacing = atoi(argv[++an]);
135			break;
136			case 'o':
137			curx = x0 = atoi(argv[++an]);
138			cury = atoi(argv[++an]);
139			break;
140	greg	1.7	case 'l':
141	greg	1.9	switch (argv[an][2]) {
142			case 'a':
143			autolabel++;
144			break;
145			case 'h':
146			labelht = atoi(argv[++an]);
147			break;
148			case '\0':
149			goto dofiles;
150			default:
151			goto userr;
152			}
153	greg	1.7	break;
154	greg	1.1	case '\0':
155			case 't':
156			goto dofiles;
157			default:
158			goto userr;
159			}
160			dofiles:
161	greg	2.18	newheader("RADIANCE", stdout);
162	greg	2.21	fputnow(stdout);
163	greg	1.1	for (nfile = 0; an < argc; nfile++) {
164	greg	1.9	if (nfile >= MAXFILE)
165			goto toomany;
166	greg	2.6	thislabel = NULL;
167	greg	2.17	input[nfile].flags = 0;
168			xsgn = ysgn = '-';
169			while (an < argc && (argv[an][0] == '-' \|\| argv[an][0] == '+'
170			\|\| argv[an][0] == '=')) {
171	greg	1.1	switch (argv[an][1]) {
172			case 't':
173			checkthresh = 1;
174			if (argv[an][0] == '-') {
175	greg	2.17	input[nfile].flags \|= HASMIN;
176	greg	2.31	input[nfile].thmin = atof(argv[an+1]);
177	greg	2.17	} else if (argv[an][0] == '+') {
178			input[nfile].flags \|= HASMAX;
179	greg	2.31	input[nfile].thmax = atof(argv[an+1]);
180	greg	2.17	} else
181			goto userr;
182			an++;
183	greg	1.1	break;
184	greg	1.9	case 'l':
185			if (strcmp(argv[an], "-l"))
186			goto userr;
187	greg	2.17	thislabel = argv[++an];
188	greg	1.9	break;
189	greg	2.17	case '+':
190			case '-':
191			case '0':
192			if (argv[an][0] != '=')
193			goto userr;
194			xsgn = argv[an][1];
195			ysgn = argv[an][2];
196			if (ysgn != '+' && ysgn != '-' && ysgn != '0')
197			goto userr;
198			break;
199	greg	1.1	case '\0':
200			if (argv[an][0] == '-')
201			goto getfile;
202	greg	1.9	goto userr;
203	greg	1.1	default:
204			goto userr;
205			}
206	greg	2.17	an++;
207			}
208	greg	1.1	getfile:
209	greg	1.7	if (argc-an < (ncolumns ? 1 : 3))
210	greg	1.1	goto userr;
211	greg	2.6	if (autolabel && thislabel == NULL)
212			thislabel = argv[an];
213	greg	1.1	if (!strcmp(argv[an], "-")) {
214	greg	2.28	input[nfile].name = StandardInput;
215	greg	1.1	input[nfile].fp = stdin;
216			} else {
217	greg	2.4	if (argv[an][0] == '!') {
218	greg	2.14	input[nfile].name = Command;
219	greg	2.4	input[nfile].fp = popen(argv[an]+1, "r");
220			} else {
221			input[nfile].name = argv[an];
222			input[nfile].fp = fopen(argv[an], "r");
223			}
224			if (input[nfile].fp == NULL) {
225	greg	1.5	perror(argv[an]);
226	greg	1.1	quit(1);
227			}
228			}
229			an++;
230			/* get header */
231	greg	2.32	if (echoheader)
232			printf("%s:\n", input[nfile].name);
233			getheader(input[nfile].fp, headline, NULL);
234	greg	1.6	if (wrongformat) {
235	greg	2.21	fprintf(stderr, "%s: incompatible input format\n",
236	greg	1.6	input[nfile].name);
237			quit(1);
238			}
239	greg	1.1	/* get picture size */
240	greg	1.4	if (fgetresolu(&input[nfile].xres, &input[nfile].yres,
241	greg	1.10	input[nfile].fp) < 0) {
242	greg	1.1	fprintf(stderr, "%s: bad picture size\n",
243			input[nfile].name);
244			quit(1);
245			}
246	greg	2.34	if (ncolumns) {
247			if (curcol >= abs(ncolumns)) {
248	greg	2.11	cury = ymax + spacing;
249			curx = x0;
250	greg	1.7	curcol = 0;
251			}
252			input[nfile].xloc = curx;
253			input[nfile].yloc = cury;
254	greg	2.11	curx += input[nfile].xres + spacing;
255	greg	1.7	curcol++;
256			} else {
257			input[nfile].xloc = atoi(argv[an++]);
258	greg	2.17	if (xsgn == '+')
259			input[nfile].xloc -= input[nfile].xres;
260			else if (xsgn == '0')
261			input[nfile].xloc -= input[nfile].xres/2;
262	greg	1.7	input[nfile].yloc = atoi(argv[an++]);
263	greg	2.17	if (ysgn == '+')
264			input[nfile].yloc -= input[nfile].yres;
265			else if (ysgn == '0')
266			input[nfile].yloc -= input[nfile].yres/2;
267	greg	1.7	}
268	greg	1.1	if (input[nfile].xloc < xmin)
269			xmin = input[nfile].xloc;
270			if (input[nfile].yloc < ymin)
271			ymin = input[nfile].yloc;
272			if (input[nfile].xloc+input[nfile].xres > xmax)
273			xmax = input[nfile].xloc+input[nfile].xres;
274			if (input[nfile].yloc+input[nfile].yres > ymax)
275			ymax = input[nfile].yloc+input[nfile].yres;
276	greg	1.9	if (thislabel != NULL) {
277			if (++nfile >= MAXFILE)
278			goto toomany;
279	greg	2.14	input[nfile].name = Label;
280	greg	2.17	input[nfile].flags = 0;
281	greg	2.7	input[nfile].xres = input[nfile-1].xres;
282			input[nfile].yres = labelht;
283	greg	1.9	if ((input[nfile].fp = lblopen(thislabel,
284			&input[nfile].xres,
285			&input[nfile].yres)) == NULL)
286	greg	1.7	goto labelerr;
287			input[nfile].xloc = input[nfile-1].xloc;
288			input[nfile].yloc = input[nfile-1].yloc +
289	greg	1.9	input[nfile-1].yres-input[nfile].yres;
290	greg	1.7	}
291	greg	1.1	}
292			if (xsiz <= 0)
293			xsiz = xmax;
294	greg	2.11	else if (xsiz > xmax)
295			xmax = xsiz;
296	greg	1.1	if (ysiz <= 0)
297			ysiz = ymax;
298	greg	2.11	else if (ysiz > ymax)
299			ymax = ysiz;
300	greg	2.34	if (ncolumns < 0) { /* reverse rows if requested */
301			int i = nfile;
302			while (i--)
303			input[i].yloc = ymax - input[i].yres - input[i].yloc;
304			}
305	greg	1.1	/* add new header info. */
306			printargs(argc, argv, stdout);
307	greg	2.19	if (strcmp(ourfmt, PICFMT))
308			fputformat(ourfmt, stdout); /* print format if known */
309	greg	1.10	putchar('\n');
310			fprtresolu(xsiz, ysiz, stdout);
311	greg	1.1
312			compos();
313
314			quit(0);
315			userr:
316	greg	2.11	fprintf(stderr,
317	greg	2.32	"Usage: %s [-h][-x xr][-y yr][-b r g b][-a n][-s p][-o x0 y0][-la][-lh h] ",
318	greg	1.8	progname);
319	greg	2.17	fprintf(stderr, "[-t min1][+t max1][-l lab][=SS] pic1 x1 y1 ..\n");
320	greg	1.7	quit(1);
321	greg	1.9	toomany:
322			fprintf(stderr, "%s: only %d files and labels allowed\n",
323			progname, MAXFILE);
324			quit(1);
325	greg	1.7	labelerr:
326			fprintf(stderr, "%s: error opening label\n", progname);
327	greg	1.1	quit(1);
328	schorsch	2.29	return 1; /* pro forma return */
329	greg	1.1	}
330
331
332	schorsch	2.29	static void
333			compos(void) /* composite pictures */
334	greg	1.1	{
335			COLR scanin, scanout;
336			int y;
337			register int x, i;
338
339	greg	1.3	scanin = (COLR )malloc((xmax-xmin)sizeof(COLR));
340	greg	1.1	if (scanin == NULL)
341			goto memerr;
342			scanin -= xmin;
343			if (checkthresh) {
344			scanout = (COLR )malloc(xsizsizeof(COLR));
345			if (scanout == NULL)
346			goto memerr;
347			} else
348			scanout = scanin;
349			for (y = ymax-1; y >= 0; y--) {
350			for (x = 0; x < xsiz; x++)
351			copycolr(scanout[x], bgcolr);
352			for (i = 0; i < nfile; i++) {
353			if (input[i].yloc > y \|\|
354			input[i].yloc+input[i].yres <= y)
355			continue;
356			if (freadcolrs(scanin+input[i].xloc,
357			input[i].xres, input[i].fp) < 0) {
358	greg	1.2	fprintf(stderr, "%s: read error (y==%d)\n",
359			input[i].name,
360			y-input[i].yloc);
361	greg	1.1	quit(1);
362			}
363			if (y >= ysiz)
364			continue;
365			if (checkthresh) {
366			x = input[i].xloc+input[i].xres;
367			if (x > xsiz)
368			x = xsiz;
369			for (x--; x >= 0 && x >= input[i].xloc; x--) {
370	greg	2.17	if (input[i].flags & HASMIN &&
371	greg	1.1	cmpcolr(scanin[x], input[i].thmin) <= 0)
372			continue;
373	greg	2.17	if (input[i].flags & HASMAX &&
374	greg	1.1	cmpcolr(scanin[x], input[i].thmax) >= 0)
375			continue;
376			copycolr(scanout[x], scanin[x]);
377			}
378			}
379			}
380			if (y >= ysiz)
381			continue;
382			if (fwritecolrs(scanout, xsiz, stdout) < 0) {
383	greg	1.5	perror(progname);
384	greg	1.1	quit(1);
385			}
386			}
387	greg	2.28	/* read remainders from streams */
388			for (i = 0; i < nfile; i++)
389			if (input[i].name[0] == '<')
390			while (getc(input[i].fp) != EOF)
391			;
392	greg	1.1	return;
393			memerr:
394	greg	1.5	perror(progname);
395	greg	1.1	quit(1);
396			}
397
398
399	schorsch	2.29	static int
400	greg	2.31	cmpcolr( /* compare COLR to luminance */
401	schorsch	2.29	register COLR c1,
402	greg	2.31	double lv2
403	schorsch	2.29	)
404	greg	1.1	{
405	greg	2.31	double lv1 = .0;
406
407			if (c1[EXP])
408			lv1 = ldexp((double)normbright(c1), (int)c1[EXP]-(COLXS+8));
409			if (lv1 < lv2) return(-1);
410			if (lv1 > lv2) return(1);
411	greg	1.1	return(0);
412	greg	1.9	}
413
414
415	schorsch	2.29	static FILE *
416			lblopen( /* open pipe to label generator */
417			char *s,
418			int *xp,
419			int *yp
420			)
421	greg	1.9	{
422	schorsch	2.26	char com[PATH_MAX];
423	greg	1.9	FILE *fp;
424
425	greg	2.7	sprintf(com, "psign -s -.15 -a 2 -x %d -y %d '%.90s'", xp, yp, s);
426	greg	1.9	if ((fp = popen(com, "r")) == NULL)
427			return(NULL);
428			if (checkheader(fp, COLRFMT, NULL) < 0)
429			goto err;
430	greg	1.10	if (fgetresolu(xp, yp, fp) < 0)
431	greg	1.9	goto err;
432			return(fp);
433			err:
434			pclose(fp);
435			return(NULL);
436	greg	1.1	}
437
438
439	greg	2.21	void
440	greg	1.1	quit(code) /* exit gracefully */
441			int code;
442			{
443	greg	2.13	register int i;
444			/* close input files */
445			for (i = 0; i < nfile; i++)
446	greg	2.14	if (input[i].name == Command \|\| input[i].name == Label)
447			pclose(input[i].fp);
448			else
449			fclose(input[i].fp);
450	greg	1.1	exit(code);
451			}