src/px/pfilt.c

/* Copyright (c) 1986 Regents of the University of California */

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

/*
 *  pfilt.c - program to post-process picture file.
 *
 *     9/26/85
 */

#include  <stdio.h>

#include  <signal.h>

#include  "color.h"

extern char  *malloc();

#define  CHECKRAD       1.5     /* radius to check for filtering */

COLOR  exposure = WHTCOLOR;     /* exposure for the frame */

double  rad = 0.0;              /* output pixel radius for filtering */

int  nrows = 0;                 /* number of rows for output */
int  ncols = 0;                 /* number of columns for output */

double  x_c = 1.0;              /* ratio of output x size to input */
double  y_r = 1.0;              /* ratio of output y size to input */

int  singlepass = 0;            /* true means skip first pass */

int  avghot = 0;                /* true means average in bright spots */

double  hotlvl = 1000.0;        /* level considered "hot" */

int  npts = 0;                  /* (half) number of points for stars */

double  spread = 1e-4;          /* spread for star points */

#define  TEMPLATE       "/usr/tmp/pfXXXXXX"

char  *tfname = NULL;

int  xres, yres;                /* resolution of input */
double  inpaspect = 1.0;        /* pixel aspect ratio of input */

int  xrad;                      /* x window size */
int  yrad;                      /* y window size */

int  barsize;                   /* size of input scan bar */
COLOR  **scanin;                /* input scan bar */
COLOR  *scanout;                /* output scan line */

char  *progname;


main(argc, argv)
int  argc;
char  **argv;
{
        extern char  *mktemp();
        extern double  atof(), pow();
        extern long  ftell();
        extern int  quit(), headline();
        FILE  *fin;
        long  fpos;
        double  outaspect = 0.0;
        double  d;
        int  i;

        if (signal(SIGINT, quit) == SIG_IGN)
                signal(SIGINT, SIG_IGN);
        if (signal(SIGHUP, quit) == SIG_IGN)
                signal(SIGINT, SIG_IGN);
        signal(SIGTERM, quit);
        signal(SIGPIPE, quit);
#ifdef  SIGXCPU
        signal(SIGXCPU, quit);
        signal(SIGXFSZ, quit);
#endif

        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'x':
                                i++;
                                if (argv[i][0] == '/') {
                                        x_c = 1.0/atof(argv[i]+1);
                                        ncols = 0;
                                } else
                                        ncols = atoi(argv[i]);
                                break;
                        case 'y':
                                i++;
                                if (argv[i][0] == '/') {
                                        y_r = 1.0/atof(argv[i]+1);
                                        nrows = 0;
                                } else
                                        nrows = atoi(argv[i]);
                                break;
                        case 'p':
                                i++;
                                outaspect = atof(argv[i]);
                                break;
                        case 'e':
                                if (argv[i+1][0] == '+' || argv[i+1][0] == '-')
                                        d = pow(2.0, atof(argv[i+1]));
                                else
                                        d = atof(argv[i+1]);
                                switch (argv[i][2]) {
                                case '\0':
                                        scalecolor(exposure, d);
                                        break;
                                case 'r':
                                        colval(exposure,RED) *= d;
                                        break;
                                case 'g':
                                        colval(exposure,GRN) *= d;
                                        break;
                                case 'b':
                                        colval(exposure,BLU) *= d;
                                        break;
                                default:
                                        goto badopt;
                                }
                                i++;
                                break;
                        case '1':
                                singlepass = 1;
                                break;
                        case '2':
                                singlepass = 0;
                                break;
                        case 'n':
                                npts = atoi(argv[++i]) / 2;
                                break;
                        case 's':
                                spread = atof(argv[++i]);
                                break;
                        case 'a':
                                avghot = !avghot;
                                break;
                        case 'h':
                                hotlvl = atof(argv[++i]);
                                break;
                        case 'r':
                                rad = atof(argv[++i]);
                                break;
                        case 'b':
                                rad = 0.0;
                                break;
                        default:;
                        badopt:
                                fprintf(stderr, "%s: unknown option: %s\n",
                                                progname, argv[i]);
                                quit(1);
                                break;
                        }
                else
                        break;
                        
        if (i == argc) {
                if (singlepass)
                        fin = stdin;
                else {
                        tfname = mktemp(TEMPLATE);
                        if ((fin = fopen(tfname, "w+")) == NULL) {
                                fprintf(stderr, "%s: can't create ", progname);
                                fprintf(stderr, "temp file \"%s\"\n", tfname);
                                quit(1);
                        }
                        copyfile(stdin, fin);
                        if (fseek(fin, 0L, 0) == -1) {
                                fprintf(stderr, "%s: seek fail\n", progname);
                                quit(1);
                        }
                }
        } else if (i == argc-1) {
                if ((fin = fopen(argv[i], "r")) == NULL) {
                        fprintf(stderr, "%s: can't open file \"%s\"\n",
                                                progname, argv[i]);
                        quit(1);
                }
        } else {
                fprintf(stderr, "%s: bad # file arguments\n", progname);
                quit(1);
        }
                                        /* get header */
        getheader(fin, headline);
                                        /* add new header info. */
        printargs(i, argv, stdout);
                                        /* get picture size */
        if (fgetresolu(&xres, &yres, fin) != (YMAJOR|YDECR)) {
                fprintf(stderr, "%s: bad picture size\n", progname);
                quit(1);
        }
                                        /* compute output resolution */
        if (ncols <= 0)
                ncols = x_c*xres + .5;
        if (nrows <= 0)
                nrows = y_r*yres + .5;
        if (outaspect > .01) {
                d = inpaspect * yres/xres / outaspect;
                if (d * ncols > nrows)
                        ncols = nrows / d;
                else
                        nrows = ncols * d;
        }
        x_c = (double)ncols/xres;
        y_r = (double)nrows/yres;

        if (singlepass) {               /* skip exposure, etc. */
                pass1default();
                pass2(fin);
                quit(0);
        }

        fpos = ftell(fin);              /* save input file position */
        
        pass1(fin);

        if (fseek(fin, fpos, 0) == -1) {
                fprintf(stderr, "%s: seek fail\n", progname);
                quit(1);
        }
        pass2(fin);

        quit(0);
}


headline(s)                             /* process line from header */
char  *s;
{
        fputs(s, stdout);               /* copy to output */
        if (isaspect(s))                /* get aspect ratio */
                inpaspect *= aspectval(s);
}


copyfile(in, out)                       /* copy a file */
register FILE  *in, *out;
{
        register int  c;

        while ((c = getc(in)) != EOF)
                putc(c, out);

        if (ferror(out)) {
                fprintf(stderr, "%s: write error in copyfile\n", progname);
                quit(1);
        }
}


pass1(in)                               /* first pass of picture file */
FILE  *in;
{
        int  i;
        COLOR  *scan;

        pass1init();

        scan = (COLOR *)malloc(xres*sizeof(COLOR));
        if (scan == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                quit(1);
        }
        for (i = 0; i < yres; i++) {
                if (freadscan(scan, xres, in) < 0) {
                        nrows = nrows * i / yres;       /* adjust frame */
                        if (nrows <= 0) {
                                fprintf(stderr, "%s: empty frame\n", progname);
                                quit(1);
                        }
                        fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
                                        progname, 100*i/yres);
                        yres = i;
                        break;
                }
                pass1scan(scan, i);
        }
        free((char *)scan);
}


pass2(in)                       /* last pass on file, write to stdout */
FILE  *in;
{
        int  yread;
        int  ycent, xcent;
        int  r, c;
        
        pass2init();
        scan2init();
        yread = 0;
        for (r = 0; r < nrows; r++) {
                ycent = (long)r*yres/nrows;
                while (yread <= ycent+yrad) {
                        if (yread < yres) {
                                if (freadscan(scanin[yread%barsize],
                                                xres, in) < 0) {
                                        fprintf(stderr,
                                                "%s: bad read (y=%d)\n",
                                                progname, yres-1-yread);
                                        quit(1);
                                }
                                pass2scan(scanin[yread%barsize], yread);
                        }
                        yread++;
                }
                for (c = 0; c < ncols; c++) {
                        xcent = (long)c*xres/ncols;
                        if (rad <= 0.0)
                                dobox(scanout[c], xcent, ycent, c, r);
                        else
                                dogauss(scanout[c], xcent, ycent, c, r);
                }
                if (fwritescan(scanout, ncols, stdout) < 0) {
                        fprintf(stderr, "%s: write error in pass2\n", progname);
                        quit(1);
                }
        }
}


scan2init()                     /* prepare scanline arrays */
{
        double  d;
        register int  i;

        if (rad <= 0.0) {
                xrad = xres/ncols/2 + 1;
                yrad = yres/nrows/2 + 1;
        } else {
                if (nrows >= yres && ncols >= xres)
                        rad *= (y_r + x_c)/2.0;

                xrad = CHECKRAD*rad/x_c + 1;
                yrad = CHECKRAD*rad/y_r + 1;

                initmask();             /* initialize filter table */
        }
        barsize = 2 * yrad;
        scanin = (COLOR **)malloc(barsize*sizeof(COLOR *));
        for (i = 0; i < barsize; i++) {
                scanin[i] = (COLOR *)malloc(xres*sizeof(COLOR));
                if (scanin[i] == NULL) {
                        fprintf(stderr, "%s: out of memory\n", progname);
                        quit(1);
                }
        }
        scanout = (COLOR *)malloc(ncols*sizeof(COLOR));
        if (scanout == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                quit(1);
        }
                                        /* record pixel aspect and exposure */
        d = x_c / y_r;
        if (d < .99 || d > 1.01)
                fputaspect(d, stdout);
        d = bright(exposure);
        if (d < .995 || d > 1.005)
                fputexpos(d, stdout);
        printf("\n");
        fputresolu(YMAJOR|YDECR, ncols, nrows, stdout); /* resolution */
}


quit(code)              /* remove temporary file and exit */
int  code;
{
        if (tfname != NULL)
                unlink(tfname);
        exit(code);
}
Revision:	1.9
Committed:	Tue Jan 9 17:58:35 1990 UTC (35 years, 10 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+40 -17 lines
Log Message:	added code to maintain pixel aspect ratio
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1986 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* pfilt.c - program to post-process picture file.
9			*
10			* 9/26/85
11			*/
12
13			#include <stdio.h>
14
15			#include <signal.h>
16
17			#include "color.h"
18
19			extern char *malloc();
20
21			#define CHECKRAD 1.5 /* radius to check for filtering */
22
23			COLOR exposure = WHTCOLOR; /* exposure for the frame */
24
25			double rad = 0.0; /* output pixel radius for filtering */
26
27			int nrows = 0; /* number of rows for output */
28			int ncols = 0; /* number of columns for output */
29
30	greg	1.4	double x_c = 1.0; /* ratio of output x size to input */
31			double y_r = 1.0; /* ratio of output y size to input */
32	greg	1.2
33	greg	1.1	int singlepass = 0; /* true means skip first pass */
34
35			int avghot = 0; /* true means average in bright spots */
36
37			double hotlvl = 1000.0; /* level considered "hot" */
38
39			int npts = 0; /* (half) number of points for stars */
40
41			double spread = 1e-4; /* spread for star points */
42
43			#define TEMPLATE "/usr/tmp/pfXXXXXX"
44
45			char *tfname = NULL;
46
47			int xres, yres; /* resolution of input */
48	greg	1.9	double inpaspect = 1.0; /* pixel aspect ratio of input */
49	greg	1.1
50			int xrad; /* x window size */
51			int yrad; /* y window size */
52
53			int barsize; /* size of input scan bar */
54			COLOR *scanin; / input scan bar */
55			COLOR scanout; / output scan line */
56
57			char *progname;
58
59
60			main(argc, argv)
61			int argc;
62			char **argv;
63			{
64			extern char *mktemp();
65			extern double atof(), pow();
66			extern long ftell();
67	greg	1.9	extern int quit(), headline();
68	greg	1.1	FILE *fin;
69			long fpos;
70	greg	1.9	double outaspect = 0.0;
71	greg	1.1	double d;
72			int i;
73
74			if (signal(SIGINT, quit) == SIG_IGN)
75			signal(SIGINT, SIG_IGN);
76			if (signal(SIGHUP, quit) == SIG_IGN)
77			signal(SIGINT, SIG_IGN);
78			signal(SIGTERM, quit);
79			signal(SIGPIPE, quit);
80			#ifdef SIGXCPU
81			signal(SIGXCPU, quit);
82			signal(SIGXFSZ, quit);
83			#endif
84
85			progname = argv[0];
86
87			for (i = 1; i < argc; i++)
88			if (argv[i][0] == '-')
89			switch (argv[i][1]) {
90			case 'x':
91	greg	1.3	i++;
92	greg	1.5	if (argv[i][0] == '/') {
93	greg	1.4	x_c = 1.0/atof(argv[i]+1);
94	greg	1.5	ncols = 0;
95			} else
96	greg	1.3	ncols = atoi(argv[i]);
97	greg	1.1	break;
98			case 'y':
99	greg	1.3	i++;
100	greg	1.5	if (argv[i][0] == '/') {
101	greg	1.4	y_r = 1.0/atof(argv[i]+1);
102	greg	1.5	nrows = 0;
103			} else
104	greg	1.3	nrows = atoi(argv[i]);
105	greg	1.1	break;
106	greg	1.9	case 'p':
107			i++;
108			outaspect = atof(argv[i]);
109			break;
110	greg	1.1	case 'e':
111			if (argv[i+1][0] == '+' \|\| argv[i+1][0] == '-')
112			d = pow(2.0, atof(argv[i+1]));
113			else
114			d = atof(argv[i+1]);
115			switch (argv[i][2]) {
116			case '\0':
117			scalecolor(exposure, d);
118			break;
119			case 'r':
120			colval(exposure,RED) *= d;
121			break;
122			case 'g':
123			colval(exposure,GRN) *= d;
124			break;
125			case 'b':
126			colval(exposure,BLU) *= d;
127			break;
128			default:
129			goto badopt;
130			}
131			i++;
132			break;
133			case '1':
134			singlepass = 1;
135			break;
136	greg	1.6	case '2':
137			singlepass = 0;
138			break;
139	greg	1.9	case 'n':
140	greg	1.1	npts = atoi(argv[++i]) / 2;
141			break;
142			case 's':
143			spread = atof(argv[++i]);
144			break;
145			case 'a':
146			avghot = !avghot;
147			break;
148			case 'h':
149			hotlvl = atof(argv[++i]);
150			break;
151			case 'r':
152			rad = atof(argv[++i]);
153			break;
154			case 'b':
155			rad = 0.0;
156			break;
157			default:;
158			badopt:
159			fprintf(stderr, "%s: unknown option: %s\n",
160			progname, argv[i]);
161			quit(1);
162			break;
163			}
164			else
165			break;
166
167			if (i == argc) {
168			if (singlepass)
169			fin = stdin;
170			else {
171			tfname = mktemp(TEMPLATE);
172			if ((fin = fopen(tfname, "w+")) == NULL) {
173			fprintf(stderr, "%s: can't create ", progname);
174			fprintf(stderr, "temp file \"%s\"\n", tfname);
175			quit(1);
176			}
177			copyfile(stdin, fin);
178			if (fseek(fin, 0L, 0) == -1) {
179			fprintf(stderr, "%s: seek fail\n", progname);
180			quit(1);
181			}
182			}
183			} else if (i == argc-1) {
184			if ((fin = fopen(argv[i], "r")) == NULL) {
185			fprintf(stderr, "%s: can't open file \"%s\"\n",
186			progname, argv[i]);
187			quit(1);
188			}
189			} else {
190			fprintf(stderr, "%s: bad # file arguments\n", progname);
191			quit(1);
192			}
193	greg	1.9	/* get header */
194			getheader(fin, headline);
195	greg	1.1	/* add new header info. */
196			printargs(i, argv, stdout);
197			/* get picture size */
198	greg	1.7	if (fgetresolu(&xres, &yres, fin) != (YMAJOR\|YDECR)) {
199	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
200			quit(1);
201			}
202	greg	1.9	/* compute output resolution */
203			if (ncols <= 0)
204	greg	1.4	ncols = x_c*xres + .5;
205	greg	1.9	if (nrows <= 0)
206	greg	1.4	nrows = y_r*yres + .5;
207	greg	1.9	if (outaspect > .01) {
208			d = inpaspect * yres/xres / outaspect;
209			if (d * ncols > nrows)
210			ncols = nrows / d;
211			else
212			nrows = ncols * d;
213			}
214			x_c = (double)ncols/xres;
215			y_r = (double)nrows/yres;
216	greg	1.1
217	greg	1.9	if (singlepass) { /* skip exposure, etc. */
218	greg	1.1	pass1default();
219			pass2(fin);
220			quit(0);
221			}
222
223			fpos = ftell(fin); /* save input file position */
224
225			pass1(fin);
226
227			if (fseek(fin, fpos, 0) == -1) {
228			fprintf(stderr, "%s: seek fail\n", progname);
229			quit(1);
230			}
231			pass2(fin);
232
233			quit(0);
234			}
235
236
237	greg	1.9	headline(s) /* process line from header */
238			char *s;
239			{
240			fputs(s, stdout); /* copy to output */
241			if (isaspect(s)) /* get aspect ratio */
242			inpaspect *= aspectval(s);
243			}
244
245
246	greg	1.1	copyfile(in, out) /* copy a file */
247			register FILE in, out;
248			{
249			register int c;
250
251			while ((c = getc(in)) != EOF)
252			putc(c, out);
253
254			if (ferror(out)) {
255			fprintf(stderr, "%s: write error in copyfile\n", progname);
256			quit(1);
257			}
258			}
259
260
261			pass1(in) /* first pass of picture file */
262			FILE *in;
263			{
264			int i;
265			COLOR *scan;
266
267			pass1init();
268
269			scan = (COLOR )malloc(xressizeof(COLOR));
270			if (scan == NULL) {
271			fprintf(stderr, "%s: out of memory\n", progname);
272			quit(1);
273			}
274			for (i = 0; i < yres; i++) {
275			if (freadscan(scan, xres, in) < 0) {
276			nrows = nrows * i / yres; /* adjust frame */
277			if (nrows <= 0) {
278			fprintf(stderr, "%s: empty frame\n", progname);
279			quit(1);
280			}
281			fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
282			progname, 100*i/yres);
283			yres = i;
284			break;
285			}
286			pass1scan(scan, i);
287			}
288			free((char *)scan);
289			}
290
291
292			pass2(in) /* last pass on file, write to stdout */
293			FILE *in;
294			{
295			int yread;
296			int ycent, xcent;
297			int r, c;
298
299			pass2init();
300			scan2init();
301			yread = 0;
302			for (r = 0; r < nrows; r++) {
303			ycent = (long)r*yres/nrows;
304			while (yread <= ycent+yrad) {
305			if (yread < yres) {
306			if (freadscan(scanin[yread%barsize],
307			xres, in) < 0) {
308			fprintf(stderr,
309			"%s: bad read (y=%d)\n",
310			progname, yres-1-yread);
311			quit(1);
312			}
313			pass2scan(scanin[yread%barsize], yread);
314			}
315			yread++;
316			}
317			for (c = 0; c < ncols; c++) {
318			xcent = (long)c*xres/ncols;
319			if (rad <= 0.0)
320			dobox(scanout[c], xcent, ycent, c, r);
321			else
322			dogauss(scanout[c], xcent, ycent, c, r);
323			}
324			if (fwritescan(scanout, ncols, stdout) < 0) {
325			fprintf(stderr, "%s: write error in pass2\n", progname);
326			quit(1);
327			}
328			}
329			}
330
331
332			scan2init() /* prepare scanline arrays */
333			{
334	greg	1.9	double d;
335	greg	1.1	register int i;
336
337			if (rad <= 0.0) {
338			xrad = xres/ncols/2 + 1;
339			yrad = yres/nrows/2 + 1;
340			} else {
341			if (nrows >= yres && ncols >= xres)
342			rad *= (y_r + x_c)/2.0;
343
344			xrad = CHECKRAD*rad/x_c + 1;
345			yrad = CHECKRAD*rad/y_r + 1;
346
347			initmask(); /* initialize filter table */
348			}
349			barsize = 2 * yrad;
350			scanin = (COLOR *)malloc(barsizesizeof(COLOR *));
351			for (i = 0; i < barsize; i++) {
352			scanin[i] = (COLOR )malloc(xressizeof(COLOR));
353			if (scanin[i] == NULL) {
354			fprintf(stderr, "%s: out of memory\n", progname);
355			quit(1);
356			}
357			}
358			scanout = (COLOR )malloc(ncolssizeof(COLOR));
359			if (scanout == NULL) {
360			fprintf(stderr, "%s: out of memory\n", progname);
361			quit(1);
362			}
363	greg	1.9	/* record pixel aspect and exposure */
364			d = x_c / y_r;
365			if (d < .99 \|\| d > 1.01)
366			fputaspect(d, stdout);
367			d = bright(exposure);
368			if (d < .995 \|\| d > 1.005)
369			fputexpos(d, stdout);
370	greg	1.1	printf("\n");
371	greg	1.7	fputresolu(YMAJOR\|YDECR, ncols, nrows, stdout); /* resolution */
372	greg	1.1	}
373
374
375			quit(code) /* remove temporary file and exit */
376			int code;
377			{
378			if (tfname != NULL)
379			unlink(tfname);
380			exit(code);
381			}