src/px/pfilt.c

/* Copyright (c) 1992 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>

#ifdef MSDOS
#include  <fcntl.h>
#endif

#include  <signal.h>

#include  "color.h"

#include  "resolu.h"

#include  "paths.h"

extern char  *malloc();
extern float  *matchlamp();

#define  FEQ(a,b)       ((a) >= .98*(b) && (a) <= 1.02*(b))

#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 */

char  *tfname = NULL;

char  *lampdat = "lamp.tab";    /* lamp data file */

int  order;                     /* scanline ordering of input */
int  xres, yres;                /* resolution of input */
double  inpaspect = 1.0;        /* pixel aspect ratio of input */
int  correctaspect = 0;         /* aspect ratio correction? */

int  wrongformat = 0;

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 double  pow();
        extern long  ftell();
        extern int  quit(), headline();
        FILE  *fin;
        float  *lampcolor;
        char  *lamptype = NULL;
        long  fpos;
        double  outaspect = 0.0;
        double  d;
        int  i, j;
#ifdef MSDOS
        extern int  _fmode;
        _fmode = O_BINARY;
        setmode(fileno(stdin), O_BINARY);
        setmode(fileno(stdout), O_BINARY);
#endif
        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 'c':
                                correctaspect = !correctaspect;
                                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]);
                                if (d < 1e-20 || d > 1e20) {
                                        fprintf(stderr,
                                                "%s: exposure out of range\n",
                                                        argv[0]);
                                        exit(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 'f':
                                lampdat = argv[++i];
                                break;
                        case 't':
                                lamptype = argv[++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;
                                        /* get lamp data (if necessary) */
        if (lamptype != NULL) {
                if (loadlamps(lampdat) < 0)
                        quit(1);
                if ((lampcolor = matchlamp(lamptype)) == NULL) {
                        fprintf(stderr, "%s: unknown lamp type\n", lamptype);
                        quit(1);
                }
                for (i = 0; i < 3; i++)
                        if (lampcolor[i] > 1e-4)
                                colval(exposure,i) /= lampcolor[i];
                freelamps();
        }
                                        /* open input file */
        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, NULL);
        if (wrongformat) {
                fprintf(stderr, "%s: input must be a Radiance picture\n",
                                progname);
                quit(1);
        }
                                        /* add new header info. */
        printargs(i, argv, stdout);
                                        /* get picture size */
        if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
                fprintf(stderr, "%s: bad picture size\n", progname);
                quit(1);
        }
        if (!(order & YMAJOR))
                inpaspect = 1.0/inpaspect;
                                        /* 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;
{
        char  fmt[32];

        fputs(s, stdout);               /* copy to output */
        if (isaspect(s))                /* get aspect ratio */
                inpaspect *= aspectval(s);
        else if (isformat(s)) {
                formatval(fmt, s);
                wrongformat = strcmp(fmt, COLRFMT);
        }
}


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;
                        y_r = (double)nrows/yres;
                        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);
                }
        }
                                        /* skip leftovers */
        while (yread < yres) {
                if (freadscan(scanin[0], xres, in) < 0)
                        break;
                yread++;
        }
}


scan2init()                     /* prepare scanline arrays */
{
        COLOR   ctmp;
        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 + 1;
        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 ratio */
        if (!correctaspect) {
                d = order & YMAJOR ? x_c/y_r : y_r/x_c ;
                if (!FEQ(d,1.0))
                        fputaspect(d, stdout);
        }
                                        /* record exposure */
        d = bright(exposure);
        if (!FEQ(d,1.0))
                fputexpos(d, stdout);
                                        /* record color correction */
        copycolor(ctmp, exposure);
        scalecolor(ctmp, 1.0/d);
        if (!FEQ(colval(ctmp,RED),colval(ctmp,GRN)) ||
                        !FEQ(colval(ctmp,GRN),colval(ctmp,BLU)))
                fputcolcor(ctmp, stdout);
        printf("\n");
                                        /* write out resolution */
        fputresolu(order, ncols, nrows, stdout);
}


quit(code)              /* remove temporary file and exit */
int  code;
{
        if (tfname != NULL)
                unlink(tfname);
        exit(code);
}
Revision:	2.4
Committed:	Mon Sep 21 12:14:17 1992 UTC (31 years, 7 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+24 -15 lines
Log Message:	Changes for PC port
#	User	Rev	Content
1	greg	2.4	/* Copyright (c) 1992 Regents of the University of California */
2	greg	1.1
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	greg	2.4	#ifdef MSDOS
16			#include <fcntl.h>
17			#endif
18
19	greg	1.1	#include <signal.h>
20
21			#include "color.h"
22
23	greg	1.19	#include "resolu.h"
24
25	greg	2.3	#include "paths.h"
26
27	greg	1.1	extern char *malloc();
28	greg	1.13	extern float *matchlamp();
29	greg	1.1
30	greg	2.4	#define FEQ(a,b) ((a) >= .98(b) && (a) <= 1.02(b))
31	greg	1.15
32	greg	2.4	#define CHECKRAD 1.5 /* radius to check for filtering */
33	greg	1.1
34			COLOR exposure = WHTCOLOR; /* exposure for the frame */
35
36	greg	2.4	double rad = 0.0; /* output pixel radius for filtering */
37	greg	1.1
38			int nrows = 0; /* number of rows for output */
39			int ncols = 0; /* number of columns for output */
40
41	greg	2.4	double x_c = 1.0; /* ratio of output x size to input */
42			double y_r = 1.0; /* ratio of output y size to input */
43	greg	1.2
44	greg	1.1	int singlepass = 0; /* true means skip first pass */
45
46			int avghot = 0; /* true means average in bright spots */
47
48	greg	2.4	double hotlvl = 1000.0; /* level considered "hot" */
49	greg	1.1
50			int npts = 0; /* (half) number of points for stars */
51
52	greg	2.4	double spread = 1e-4; /* spread for star points */
53	greg	1.1
54			char *tfname = NULL;
55
56	greg	1.13	char lampdat = "lamp.tab"; / lamp data file */
57
58	greg	1.19	int order; /* scanline ordering of input */
59	greg	1.1	int xres, yres; /* resolution of input */
60	greg	2.4	double inpaspect = 1.0; /* pixel aspect ratio of input */
61	greg	1.12	int correctaspect = 0; /* aspect ratio correction? */
62	greg	1.1
63	greg	1.16	int wrongformat = 0;
64
65	greg	1.1	int xrad; /* x window size */
66			int yrad; /* y window size */
67
68			int barsize; /* size of input scan bar */
69			COLOR *scanin; / input scan bar */
70			COLOR scanout; / output scan line */
71
72			char *progname;
73
74
75			main(argc, argv)
76			int argc;
77			char **argv;
78			{
79	greg	2.2	extern double pow();
80	greg	1.1	extern long ftell();
81	greg	1.9	extern int quit(), headline();
82	greg	1.1	FILE *fin;
83	greg	1.13	float *lampcolor;
84			char *lamptype = NULL;
85	greg	1.1	long fpos;
86	greg	2.4	double outaspect = 0.0;
87			double d;
88	greg	1.18	int i, j;
89	greg	2.4	#ifdef MSDOS
90			extern int _fmode;
91			_fmode = O_BINARY;
92			setmode(fileno(stdin), O_BINARY);
93			setmode(fileno(stdout), O_BINARY);
94			#endif
95	greg	1.1	if (signal(SIGINT, quit) == SIG_IGN)
96			signal(SIGINT, SIG_IGN);
97			if (signal(SIGHUP, quit) == SIG_IGN)
98			signal(SIGINT, SIG_IGN);
99			signal(SIGTERM, quit);
100			signal(SIGPIPE, quit);
101	greg	2.4	#ifdef SIGXCPU
102	greg	1.1	signal(SIGXCPU, quit);
103			signal(SIGXFSZ, quit);
104			#endif
105
106			progname = argv[0];
107
108			for (i = 1; i < argc; i++)
109			if (argv[i][0] == '-')
110			switch (argv[i][1]) {
111			case 'x':
112	greg	1.3	i++;
113	greg	1.5	if (argv[i][0] == '/') {
114	greg	1.4	x_c = 1.0/atof(argv[i]+1);
115	greg	1.5	ncols = 0;
116			} else
117	greg	1.3	ncols = atoi(argv[i]);
118	greg	1.1	break;
119			case 'y':
120	greg	1.3	i++;
121	greg	1.5	if (argv[i][0] == '/') {
122	greg	1.4	y_r = 1.0/atof(argv[i]+1);
123	greg	1.5	nrows = 0;
124			} else
125	greg	1.3	nrows = atoi(argv[i]);
126	greg	1.1	break;
127	greg	1.12	case 'c':
128			correctaspect = !correctaspect;
129			break;
130	greg	1.9	case 'p':
131			i++;
132			outaspect = atof(argv[i]);
133			break;
134	greg	1.1	case 'e':
135			if (argv[i+1][0] == '+' \|\| argv[i+1][0] == '-')
136			d = pow(2.0, atof(argv[i+1]));
137			else
138			d = atof(argv[i+1]);
139	greg	1.15	if (d < 1e-20 \|\| d > 1e20) {
140			fprintf(stderr,
141			"%s: exposure out of range\n",
142			argv[0]);
143			exit(1);
144			}
145	greg	1.1	switch (argv[i][2]) {
146			case '\0':
147			scalecolor(exposure, d);
148			break;
149			case 'r':
150			colval(exposure,RED) *= d;
151			break;
152			case 'g':
153			colval(exposure,GRN) *= d;
154			break;
155			case 'b':
156			colval(exposure,BLU) *= d;
157			break;
158			default:
159			goto badopt;
160			}
161			i++;
162			break;
163	greg	1.13	case 'f':
164			lampdat = argv[++i];
165			break;
166			case 't':
167			lamptype = argv[++i];
168			break;
169	greg	1.1	case '1':
170			singlepass = 1;
171			break;
172	greg	1.6	case '2':
173			singlepass = 0;
174			break;
175	greg	1.9	case 'n':
176	greg	1.1	npts = atoi(argv[++i]) / 2;
177			break;
178			case 's':
179			spread = atof(argv[++i]);
180			break;
181			case 'a':
182			avghot = !avghot;
183			break;
184			case 'h':
185			hotlvl = atof(argv[++i]);
186			break;
187			case 'r':
188			rad = atof(argv[++i]);
189			break;
190			case 'b':
191			rad = 0.0;
192			break;
193			default:;
194			badopt:
195			fprintf(stderr, "%s: unknown option: %s\n",
196			progname, argv[i]);
197			quit(1);
198			break;
199			}
200			else
201			break;
202	greg	1.14	/* get lamp data (if necessary) */
203			if (lamptype != NULL) {
204			if (loadlamps(lampdat) < 0)
205			quit(1);
206			if ((lampcolor = matchlamp(lamptype)) == NULL) {
207			fprintf(stderr, "%s: unknown lamp type\n", lamptype);
208			quit(1);
209			}
210	greg	1.18	for (i = 0; i < 3; i++)
211			if (lampcolor[i] > 1e-4)
212			colval(exposure,i) /= lampcolor[i];
213	greg	1.14	freelamps();
214			}
215			/* open input file */
216	greg	1.1	if (i == argc) {
217			if (singlepass)
218			fin = stdin;
219			else {
220			tfname = mktemp(TEMPLATE);
221			if ((fin = fopen(tfname, "w+")) == NULL) {
222			fprintf(stderr, "%s: can't create ", progname);
223			fprintf(stderr, "temp file \"%s\"\n", tfname);
224			quit(1);
225			}
226			copyfile(stdin, fin);
227			if (fseek(fin, 0L, 0) == -1) {
228			fprintf(stderr, "%s: seek fail\n", progname);
229			quit(1);
230			}
231			}
232			} else if (i == argc-1) {
233			if ((fin = fopen(argv[i], "r")) == NULL) {
234			fprintf(stderr, "%s: can't open file \"%s\"\n",
235			progname, argv[i]);
236			quit(1);
237			}
238			} else {
239			fprintf(stderr, "%s: bad # file arguments\n", progname);
240			quit(1);
241			}
242	greg	1.9	/* get header */
243	greg	1.16	getheader(fin, headline, NULL);
244			if (wrongformat) {
245			fprintf(stderr, "%s: input must be a Radiance picture\n",
246			progname);
247			quit(1);
248			}
249	greg	1.1	/* add new header info. */
250			printargs(i, argv, stdout);
251			/* get picture size */
252	greg	1.19	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
253	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
254			quit(1);
255			}
256	greg	1.19	if (!(order & YMAJOR))
257			inpaspect = 1.0/inpaspect;
258	greg	1.9	/* compute output resolution */
259			if (ncols <= 0)
260	greg	1.4	ncols = x_c*xres + .5;
261	greg	1.9	if (nrows <= 0)
262	greg	1.4	nrows = y_r*yres + .5;
263	greg	1.9	if (outaspect > .01) {
264			d = inpaspect * yres/xres / outaspect;
265			if (d * ncols > nrows)
266			ncols = nrows / d;
267			else
268			nrows = ncols * d;
269			}
270			x_c = (double)ncols/xres;
271			y_r = (double)nrows/yres;
272	greg	1.1
273	greg	1.9	if (singlepass) { /* skip exposure, etc. */
274	greg	1.1	pass1default();
275			pass2(fin);
276			quit(0);
277			}
278
279			fpos = ftell(fin); /* save input file position */
280
281			pass1(fin);
282
283			if (fseek(fin, fpos, 0) == -1) {
284			fprintf(stderr, "%s: seek fail\n", progname);
285			quit(1);
286			}
287			pass2(fin);
288
289			quit(0);
290			}
291
292
293	greg	1.9	headline(s) /* process line from header */
294			char *s;
295			{
296	greg	1.16	char fmt[32];
297
298	greg	1.9	fputs(s, stdout); /* copy to output */
299			if (isaspect(s)) /* get aspect ratio */
300			inpaspect *= aspectval(s);
301	greg	1.16	else if (isformat(s)) {
302			formatval(fmt, s);
303			wrongformat = strcmp(fmt, COLRFMT);
304			}
305	greg	1.9	}
306
307
308	greg	1.1	copyfile(in, out) /* copy a file */
309			register FILE in, out;
310			{
311			register int c;
312
313			while ((c = getc(in)) != EOF)
314			putc(c, out);
315
316			if (ferror(out)) {
317			fprintf(stderr, "%s: write error in copyfile\n", progname);
318			quit(1);
319			}
320			}
321
322
323			pass1(in) /* first pass of picture file */
324			FILE *in;
325			{
326			int i;
327			COLOR *scan;
328
329			pass1init();
330
331			scan = (COLOR )malloc(xressizeof(COLOR));
332			if (scan == NULL) {
333			fprintf(stderr, "%s: out of memory\n", progname);
334			quit(1);
335			}
336			for (i = 0; i < yres; i++) {
337			if (freadscan(scan, xres, in) < 0) {
338			nrows = nrows * i / yres; /* adjust frame */
339			if (nrows <= 0) {
340			fprintf(stderr, "%s: empty frame\n", progname);
341			quit(1);
342			}
343			fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
344			progname, 100*i/yres);
345			yres = i;
346	greg	1.11	y_r = (double)nrows/yres;
347	greg	1.1	break;
348			}
349			pass1scan(scan, i);
350			}
351			free((char *)scan);
352			}
353
354
355			pass2(in) /* last pass on file, write to stdout */
356			FILE *in;
357			{
358			int yread;
359			int ycent, xcent;
360			int r, c;
361	greg	2.4
362	greg	1.1	pass2init();
363			scan2init();
364			yread = 0;
365			for (r = 0; r < nrows; r++) {
366			ycent = (long)r*yres/nrows;
367			while (yread <= ycent+yrad) {
368			if (yread < yres) {
369			if (freadscan(scanin[yread%barsize],
370			xres, in) < 0) {
371			fprintf(stderr,
372			"%s: bad read (y=%d)\n",
373			progname, yres-1-yread);
374			quit(1);
375			}
376			pass2scan(scanin[yread%barsize], yread);
377			}
378			yread++;
379			}
380			for (c = 0; c < ncols; c++) {
381			xcent = (long)c*xres/ncols;
382			if (rad <= 0.0)
383			dobox(scanout[c], xcent, ycent, c, r);
384			else
385			dogauss(scanout[c], xcent, ycent, c, r);
386			}
387			if (fwritescan(scanout, ncols, stdout) < 0) {
388			fprintf(stderr, "%s: write error in pass2\n", progname);
389			quit(1);
390			}
391			}
392	greg	1.10	/* skip leftovers */
393			while (yread < yres) {
394			if (freadscan(scanin[0], xres, in) < 0)
395			break;
396			yread++;
397			}
398	greg	1.1	}
399
400
401			scan2init() /* prepare scanline arrays */
402			{
403	greg	1.15	COLOR ctmp;
404	greg	2.4	double d;
405	greg	1.1	register int i;
406
407			if (rad <= 0.0) {
408			xrad = xres/ncols/2 + 1;
409			yrad = yres/nrows/2 + 1;
410			} else {
411			if (nrows >= yres && ncols >= xres)
412			rad *= (y_r + x_c)/2.0;
413
414			xrad = CHECKRAD*rad/x_c + 1;
415			yrad = CHECKRAD*rad/y_r + 1;
416
417			initmask(); /* initialize filter table */
418			}
419	greg	1.17	barsize = 2*yrad + 1;
420	greg	1.1	scanin = (COLOR *)malloc(barsizesizeof(COLOR *));
421			for (i = 0; i < barsize; i++) {
422			scanin[i] = (COLOR )malloc(xressizeof(COLOR));
423			if (scanin[i] == NULL) {
424			fprintf(stderr, "%s: out of memory\n", progname);
425			quit(1);
426			}
427			}
428			scanout = (COLOR )malloc(ncolssizeof(COLOR));
429			if (scanout == NULL) {
430			fprintf(stderr, "%s: out of memory\n", progname);
431			quit(1);
432			}
433	greg	1.15	/* record pixel aspect ratio */
434	greg	1.12	if (!correctaspect) {
435	greg	1.19	d = order & YMAJOR ? x_c/y_r : y_r/x_c ;
436	greg	1.15	if (!FEQ(d,1.0))
437	greg	1.12	fputaspect(d, stdout);
438			}
439	greg	1.15	/* record exposure */
440	greg	1.9	d = bright(exposure);
441	greg	1.15	if (!FEQ(d,1.0))
442	greg	1.9	fputexpos(d, stdout);
443	greg	1.15	/* record color correction */
444			copycolor(ctmp, exposure);
445			scalecolor(ctmp, 1.0/d);
446			if (!FEQ(colval(ctmp,RED),colval(ctmp,GRN)) \|\|
447			!FEQ(colval(ctmp,GRN),colval(ctmp,BLU)))
448			fputcolcor(ctmp, stdout);
449	greg	1.1	printf("\n");
450	greg	1.15	/* write out resolution */
451	greg	1.19	fputresolu(order, ncols, nrows, stdout);
452	greg	1.1	}
453
454
455			quit(code) /* remove temporary file and exit */
456			int code;
457			{
458			if (tfname != NULL)
459			unlink(tfname);
460			exit(code);
461			}