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
 *     6/23/93  Added additional buffers for value spreading
 */

#include  "standard.h"

#include  <signal.h>

#include  "color.h"

#include  "resolu.h"

#include  "paths.h"

extern float  *matchlamp();

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

double   CHECKRAD = 1.5;        /* radius to check for filtering */

#define  THRESHRAD      5.0     /* maximum sample spread in output */

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

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

double  thresh = 0.0;           /* maximum contribution for subpixel */

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 = 100.0;         /* 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 search radius */
int  yrad;                      /* y search radius */
int  xbrad;                     /* x box size */
int  ybrad;                     /* y box size */

int  barsize;                   /* size of input scan bar */
COLOR  **scanin;                /* input scan bar */
COLOR  *scanout;                /* output scan line */
COLOR  **scoutbar;              /* output scan bar (if thresh > 0) */
float  **greybar;               /* grey-averaged input values */
int  obarsize = 0;              /* size of output scan bar */
int  orad = 0;                  /* output window radius */

char  *progname;


main(argc, argv)
int  argc;
char  **argv;
{
        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] = fixargv0(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 'm':
                                thresh = atof(argv[++i]);
                                if (rad <= FTINY)
                                        rad = 1.0;
                                break;
                        case 'b':
                                rad = thresh = 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 (isexpos(s))
                hotlvl *= exposval(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 = (long)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, (int)(100L*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++;
                }
                if (obarsize > 0)
                        scan2sync(r);
                for (c = 0; c < ncols; c++) {
                        xcent = (long)c*xres/ncols;
                        if (thresh > FTINY)
                                dothresh(xcent, ycent, c, r);
                        else if (rad > FTINY)
                                dogauss(scanout[c], xcent, ycent, c, r);
                        else
                                dobox(scanout[c], xcent, ycent, c, r);
                }
                if (scanout != NULL && fwritescan(scanout, ncols, stdout) < 0) {
                        fprintf(stderr, "%s: write error in pass2\n", progname);
                        quit(1);
                }
        }
                                        /* skip leftover input */
        while (yread < yres) {
                if (freadscan(scanin[0], xres, in) < 0)
                        break;
                yread++;
        }
        scan2flush();                   /* flush output */
}


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

        xbrad = xres/ncols/2 + 1;
        ybrad = yres/nrows/2 + 1;
        if (rad > FTINY) {
                if (nrows >= yres && ncols >= xres)
                        rad *= (y_r + x_c)/2.0;

                if (thresh > FTINY) {
                        xrad = CHECKRAD*THRESHRAD*rad/x_c + xbrad;
                        yrad = CHECKRAD*THRESHRAD*rad/y_r + ybrad;
                        orad = CHECKRAD*THRESHRAD*rad + 1;
                        obarsize = 2*orad + 1;
                } else {
                        xrad = CHECKRAD*rad/x_c + 1;
                        yrad = CHECKRAD*rad/y_r + 1;
                }
                initmask();             /* initialize filter table */
        } else {
                xrad = xbrad;
                yrad = ybrad;
        }
        barsize = 2*yrad + 1;
        scanin = (COLOR **)malloc(barsize*sizeof(COLOR *));
        if (scanin == NULL)
                goto memerr;
        for (i = 0; i < barsize; i++) {
                scanin[i] = (COLOR *)malloc(xres*sizeof(COLOR));
                if (scanin[i] == NULL)
                        goto memerr;
        }
        if (obarsize > 0) {
                scoutbar = (COLOR **)malloc(obarsize*sizeof(COLOR *));
                greybar = (float **)malloc(obarsize*sizeof(float *));
                if (scoutbar == NULL | greybar == NULL)
                        goto memerr;
                for (i = 0; i < obarsize; i++) {
                        scoutbar[i] = (COLOR *)malloc(ncols*sizeof(COLOR));
                        greybar[i] = (float *)malloc(ncols*sizeof(float));
                        if (scoutbar[i] == NULL | greybar[i] == NULL)
                                goto memerr;
                }
        } else {
                scanout = (COLOR *)malloc(ncols*sizeof(COLOR));
                if (scanout == NULL)
                        goto memerr;
        }
                                        /* 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);
        return;
memerr:
        fprintf(stderr, "%s: out of memory\n", progname);
        quit(1);
}


scan2sync(r)                    /* synchronize grey averages and output scan */
int  r;
{
        static int  nextrow = 0;
        COLOR  ctmp;
        int  ybot;
        register int  c;
                                        /* average input scanlines */
        while (nextrow < r+orad && nextrow < nrows) {
                ybot = (long)nextrow*yres/nrows;
                for (c = 0; c < ncols; c++) {
                        dobox(ctmp, (int)((long)c*xres/ncols),ybot, c,nextrow);
                        greybar[nextrow%obarsize][c] = bright(ctmp);
                }
                                        /* and zero output scanline */
                bzero((char *)scoutbar[nextrow%obarsize], ncols*sizeof(COLOR));
                nextrow++;
        }
                                        /* point to top scanline for output */
        if (r-orad >= 0)
                scanout = scoutbar[(r-orad)%obarsize];
        else
                scanout = NULL;
}


scan2flush()                    /* flush output buffer */
{
        register int  r;

        for (r = nrows-orad; r < nrows; r++)
                if (fwritescan(scoutbar[r%obarsize], ncols, stdout) < 0)
                        break;
        if (fflush(stdout) < 0) {
                fprintf(stderr, "%s: write error at end of pass2\n", progname);
                exit(1);
        }
}


quit(code)              /* remove temporary file and exit */
int  code;
{
        if (tfname != NULL)
                unlink(tfname);
        exit(code);
}
Revision:	2.10
Committed:	Fri Jun 25 17:07:03 1993 UTC (32 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.9:	+14 -13 lines
Log Message:	minor optimization
#	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	greg	2.9	* 6/23/93 Added additional buffers for value spreading
12	greg	1.1	*/
13
14	greg	2.6	#include "standard.h"
15	greg	1.1
16			#include <signal.h>
17
18			#include "color.h"
19
20	greg	1.19	#include "resolu.h"
21
22	greg	2.3	#include "paths.h"
23
24	greg	1.13	extern float *matchlamp();
25	greg	1.1
26	greg	2.4	#define FEQ(a,b) ((a) >= .98(b) && (a) <= 1.02(b))
27	greg	1.15
28	greg	2.9	double CHECKRAD = 1.5; /* radius to check for filtering */
29	greg	1.1
30	greg	2.9	#define THRESHRAD 5.0 /* maximum sample spread in output */
31
32	greg	1.1	COLOR exposure = WHTCOLOR; /* exposure for the frame */
33
34	greg	2.4	double rad = 0.0; /* output pixel radius for filtering */
35	greg	1.1
36	greg	2.9	double thresh = 0.0; /* maximum contribution for subpixel */
37
38	greg	1.1	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	2.8	double hotlvl = 100.0; /* 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	2.9	int xrad; /* x search radius */
66			int yrad; /* y search radius */
67			int xbrad; /* x box size */
68			int ybrad; /* y box size */
69	greg	1.1
70			int barsize; /* size of input scan bar */
71			COLOR *scanin; / input scan bar */
72			COLOR scanout; / output scan line */
73	greg	2.9	COLOR *scoutbar; / output scan bar (if thresh > 0) */
74			float *greybar; / grey-averaged input values */
75			int obarsize = 0; /* size of output scan bar */
76			int orad = 0; /* output window radius */
77	greg	1.1
78			char *progname;
79
80
81			main(argc, argv)
82			int argc;
83			char **argv;
84			{
85			extern long ftell();
86	greg	1.9	extern int quit(), headline();
87	greg	1.1	FILE *fin;
88	greg	1.13	float *lampcolor;
89			char *lamptype = NULL;
90	greg	1.1	long fpos;
91	greg	2.4	double outaspect = 0.0;
92			double d;
93	greg	1.18	int i, j;
94	greg	2.4	#ifdef MSDOS
95			extern int _fmode;
96			_fmode = O_BINARY;
97			setmode(fileno(stdin), O_BINARY);
98			setmode(fileno(stdout), O_BINARY);
99			#endif
100	greg	1.1	if (signal(SIGINT, quit) == SIG_IGN)
101			signal(SIGINT, SIG_IGN);
102			if (signal(SIGHUP, quit) == SIG_IGN)
103			signal(SIGINT, SIG_IGN);
104			signal(SIGTERM, quit);
105			signal(SIGPIPE, quit);
106	greg	2.4	#ifdef SIGXCPU
107	greg	1.1	signal(SIGXCPU, quit);
108			signal(SIGXFSZ, quit);
109			#endif
110
111	greg	2.6	progname = argv[0] = fixargv0(argv[0]);
112	greg	1.1
113			for (i = 1; i < argc; i++)
114			if (argv[i][0] == '-')
115			switch (argv[i][1]) {
116			case 'x':
117	greg	1.3	i++;
118	greg	1.5	if (argv[i][0] == '/') {
119	greg	1.4	x_c = 1.0/atof(argv[i]+1);
120	greg	1.5	ncols = 0;
121			} else
122	greg	1.3	ncols = atoi(argv[i]);
123	greg	1.1	break;
124			case 'y':
125	greg	1.3	i++;
126	greg	1.5	if (argv[i][0] == '/') {
127	greg	1.4	y_r = 1.0/atof(argv[i]+1);
128	greg	1.5	nrows = 0;
129			} else
130	greg	1.3	nrows = atoi(argv[i]);
131	greg	1.1	break;
132	greg	1.12	case 'c':
133			correctaspect = !correctaspect;
134			break;
135	greg	1.9	case 'p':
136			i++;
137			outaspect = atof(argv[i]);
138			break;
139	greg	1.1	case 'e':
140			if (argv[i+1][0] == '+' \|\| argv[i+1][0] == '-')
141			d = pow(2.0, atof(argv[i+1]));
142			else
143			d = atof(argv[i+1]);
144	greg	1.15	if (d < 1e-20 \|\| d > 1e20) {
145			fprintf(stderr,
146			"%s: exposure out of range\n",
147			argv[0]);
148			exit(1);
149			}
150	greg	1.1	switch (argv[i][2]) {
151			case '\0':
152			scalecolor(exposure, d);
153			break;
154			case 'r':
155			colval(exposure,RED) *= d;
156			break;
157			case 'g':
158			colval(exposure,GRN) *= d;
159			break;
160			case 'b':
161			colval(exposure,BLU) *= d;
162			break;
163			default:
164			goto badopt;
165			}
166			i++;
167			break;
168	greg	1.13	case 'f':
169			lampdat = argv[++i];
170			break;
171			case 't':
172			lamptype = argv[++i];
173			break;
174	greg	1.1	case '1':
175			singlepass = 1;
176			break;
177	greg	1.6	case '2':
178			singlepass = 0;
179			break;
180	greg	1.9	case 'n':
181	greg	1.1	npts = atoi(argv[++i]) / 2;
182			break;
183			case 's':
184			spread = atof(argv[++i]);
185			break;
186			case 'a':
187			avghot = !avghot;
188			break;
189			case 'h':
190			hotlvl = atof(argv[++i]);
191			break;
192			case 'r':
193			rad = atof(argv[++i]);
194			break;
195	greg	2.9	case 'm':
196			thresh = atof(argv[++i]);
197			if (rad <= FTINY)
198			rad = 1.0;
199			break;
200	greg	1.1	case 'b':
201	greg	2.9	rad = thresh = 0.0;
202	greg	1.1	break;
203			default:;
204			badopt:
205			fprintf(stderr, "%s: unknown option: %s\n",
206			progname, argv[i]);
207			quit(1);
208			break;
209			}
210			else
211			break;
212	greg	1.14	/* get lamp data (if necessary) */
213			if (lamptype != NULL) {
214			if (loadlamps(lampdat) < 0)
215			quit(1);
216			if ((lampcolor = matchlamp(lamptype)) == NULL) {
217			fprintf(stderr, "%s: unknown lamp type\n", lamptype);
218			quit(1);
219			}
220	greg	1.18	for (i = 0; i < 3; i++)
221			if (lampcolor[i] > 1e-4)
222			colval(exposure,i) /= lampcolor[i];
223	greg	1.14	freelamps();
224			}
225			/* open input file */
226	greg	1.1	if (i == argc) {
227			if (singlepass)
228			fin = stdin;
229			else {
230			tfname = mktemp(TEMPLATE);
231			if ((fin = fopen(tfname, "w+")) == NULL) {
232			fprintf(stderr, "%s: can't create ", progname);
233			fprintf(stderr, "temp file \"%s\"\n", tfname);
234			quit(1);
235			}
236			copyfile(stdin, fin);
237			if (fseek(fin, 0L, 0) == -1) {
238			fprintf(stderr, "%s: seek fail\n", progname);
239			quit(1);
240			}
241			}
242			} else if (i == argc-1) {
243			if ((fin = fopen(argv[i], "r")) == NULL) {
244			fprintf(stderr, "%s: can't open file \"%s\"\n",
245			progname, argv[i]);
246			quit(1);
247			}
248			} else {
249			fprintf(stderr, "%s: bad # file arguments\n", progname);
250			quit(1);
251			}
252	greg	1.9	/* get header */
253	greg	1.16	getheader(fin, headline, NULL);
254			if (wrongformat) {
255			fprintf(stderr, "%s: input must be a Radiance picture\n",
256			progname);
257			quit(1);
258			}
259	greg	1.1	/* add new header info. */
260			printargs(i, argv, stdout);
261			/* get picture size */
262	greg	1.19	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
263	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
264			quit(1);
265			}
266	greg	1.19	if (!(order & YMAJOR))
267			inpaspect = 1.0/inpaspect;
268	greg	1.9	/* compute output resolution */
269			if (ncols <= 0)
270	greg	1.4	ncols = x_c*xres + .5;
271	greg	1.9	if (nrows <= 0)
272	greg	1.4	nrows = y_r*yres + .5;
273	greg	1.9	if (outaspect > .01) {
274			d = inpaspect * yres/xres / outaspect;
275			if (d * ncols > nrows)
276			ncols = nrows / d;
277			else
278			nrows = ncols * d;
279			}
280			x_c = (double)ncols/xres;
281			y_r = (double)nrows/yres;
282	greg	1.1
283	greg	1.9	if (singlepass) { /* skip exposure, etc. */
284	greg	1.1	pass1default();
285			pass2(fin);
286			quit(0);
287			}
288
289			fpos = ftell(fin); /* save input file position */
290
291			pass1(fin);
292
293			if (fseek(fin, fpos, 0) == -1) {
294			fprintf(stderr, "%s: seek fail\n", progname);
295			quit(1);
296			}
297			pass2(fin);
298
299			quit(0);
300			}
301
302
303	greg	1.9	headline(s) /* process line from header */
304			char *s;
305			{
306	greg	1.16	char fmt[32];
307
308	greg	1.9	fputs(s, stdout); /* copy to output */
309			if (isaspect(s)) /* get aspect ratio */
310			inpaspect *= aspectval(s);
311	greg	2.8	else if (isexpos(s))
312			hotlvl *= exposval(s);
313	greg	1.16	else if (isformat(s)) {
314			formatval(fmt, s);
315			wrongformat = strcmp(fmt, COLRFMT);
316			}
317	greg	1.9	}
318
319
320	greg	1.1	copyfile(in, out) /* copy a file */
321			register FILE in, out;
322			{
323			register int c;
324
325			while ((c = getc(in)) != EOF)
326			putc(c, out);
327
328			if (ferror(out)) {
329			fprintf(stderr, "%s: write error in copyfile\n", progname);
330			quit(1);
331			}
332			}
333
334
335			pass1(in) /* first pass of picture file */
336			FILE *in;
337			{
338			int i;
339			COLOR *scan;
340
341			pass1init();
342
343			scan = (COLOR )malloc(xressizeof(COLOR));
344			if (scan == NULL) {
345			fprintf(stderr, "%s: out of memory\n", progname);
346			quit(1);
347			}
348			for (i = 0; i < yres; i++) {
349			if (freadscan(scan, xres, in) < 0) {
350	greg	2.7	nrows = (long)nrows * i / yres; /* adjust frame */
351	greg	1.1	if (nrows <= 0) {
352			fprintf(stderr, "%s: empty frame\n", progname);
353			quit(1);
354			}
355			fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
356	greg	2.7	progname, (int)(100L*i/yres));
357	greg	1.1	yres = i;
358	greg	1.11	y_r = (double)nrows/yres;
359	greg	1.1	break;
360			}
361			pass1scan(scan, i);
362			}
363			free((char *)scan);
364			}
365
366
367			pass2(in) /* last pass on file, write to stdout */
368			FILE *in;
369			{
370			int yread;
371			int ycent, xcent;
372			int r, c;
373	greg	2.4
374	greg	1.1	pass2init();
375			scan2init();
376			yread = 0;
377			for (r = 0; r < nrows; r++) {
378			ycent = (long)r*yres/nrows;
379			while (yread <= ycent+yrad) {
380			if (yread < yres) {
381			if (freadscan(scanin[yread%barsize],
382			xres, in) < 0) {
383			fprintf(stderr,
384			"%s: bad read (y=%d)\n",
385			progname, yres-1-yread);
386			quit(1);
387			}
388			pass2scan(scanin[yread%barsize], yread);
389			}
390			yread++;
391			}
392	greg	2.9	if (obarsize > 0)
393			scan2sync(r);
394	greg	1.1	for (c = 0; c < ncols; c++) {
395			xcent = (long)c*xres/ncols;
396	greg	2.9	if (thresh > FTINY)
397			dothresh(xcent, ycent, c, r);
398			else if (rad > FTINY)
399			dogauss(scanout[c], xcent, ycent, c, r);
400			else
401	greg	1.1	dobox(scanout[c], xcent, ycent, c, r);
402			}
403	greg	2.9	if (scanout != NULL && fwritescan(scanout, ncols, stdout) < 0) {
404	greg	1.1	fprintf(stderr, "%s: write error in pass2\n", progname);
405			quit(1);
406			}
407			}
408	greg	2.9	/* skip leftover input */
409	greg	1.10	while (yread < yres) {
410			if (freadscan(scanin[0], xres, in) < 0)
411			break;
412			yread++;
413			}
414	greg	2.9	scan2flush(); /* flush output */
415	greg	1.1	}
416
417
418			scan2init() /* prepare scanline arrays */
419			{
420	greg	1.15	COLOR ctmp;
421	greg	2.4	double d;
422	greg	1.1	register int i;
423
424	greg	2.9	xbrad = xres/ncols/2 + 1;
425			ybrad = yres/nrows/2 + 1;
426			if (rad > FTINY) {
427	greg	1.1	if (nrows >= yres && ncols >= xres)
428			rad *= (y_r + x_c)/2.0;
429
430	greg	2.9	if (thresh > FTINY) {
431			xrad = CHECKRADTHRESHRADrad/x_c + xbrad;
432			yrad = CHECKRADTHRESHRADrad/y_r + ybrad;
433			orad = CHECKRADTHRESHRADrad + 1;
434			obarsize = 2*orad + 1;
435			} else {
436			xrad = CHECKRAD*rad/x_c + 1;
437			yrad = CHECKRAD*rad/y_r + 1;
438			}
439	greg	1.1	initmask(); /* initialize filter table */
440	greg	2.9	} else {
441			xrad = xbrad;
442			yrad = ybrad;
443	greg	1.1	}
444	greg	1.17	barsize = 2*yrad + 1;
445	greg	1.1	scanin = (COLOR *)malloc(barsizesizeof(COLOR *));
446	greg	2.10	if (scanin == NULL)
447			goto memerr;
448	greg	1.1	for (i = 0; i < barsize; i++) {
449			scanin[i] = (COLOR )malloc(xressizeof(COLOR));
450	greg	2.10	if (scanin[i] == NULL)
451			goto memerr;
452	greg	1.1	}
453	greg	2.9	if (obarsize > 0) {
454			scoutbar = (COLOR *)malloc(obarsizesizeof(COLOR *));
455			greybar = (float *)malloc(obarsizesizeof(float *));
456	greg	2.10	if (scoutbar == NULL \| greybar == NULL)
457			goto memerr;
458	greg	2.9	for (i = 0; i < obarsize; i++) {
459			scoutbar[i] = (COLOR )malloc(ncolssizeof(COLOR));
460			greybar[i] = (float )malloc(ncolssizeof(float));
461	greg	2.10	if (scoutbar[i] == NULL \| greybar[i] == NULL)
462			goto memerr;
463	greg	2.9	}
464			} else {
465			scanout = (COLOR )malloc(ncolssizeof(COLOR));
466	greg	2.10	if (scanout == NULL)
467			goto memerr;
468	greg	1.1	}
469	greg	1.15	/* record pixel aspect ratio */
470	greg	1.12	if (!correctaspect) {
471	greg	1.19	d = order & YMAJOR ? x_c/y_r : y_r/x_c ;
472	greg	1.15	if (!FEQ(d,1.0))
473	greg	1.12	fputaspect(d, stdout);
474			}
475	greg	1.15	/* record exposure */
476	greg	1.9	d = bright(exposure);
477	greg	1.15	if (!FEQ(d,1.0))
478	greg	1.9	fputexpos(d, stdout);
479	greg	1.15	/* record color correction */
480			copycolor(ctmp, exposure);
481			scalecolor(ctmp, 1.0/d);
482			if (!FEQ(colval(ctmp,RED),colval(ctmp,GRN)) \|\|
483			!FEQ(colval(ctmp,GRN),colval(ctmp,BLU)))
484			fputcolcor(ctmp, stdout);
485	greg	1.1	printf("\n");
486	greg	1.15	/* write out resolution */
487	greg	1.19	fputresolu(order, ncols, nrows, stdout);
488	greg	2.10	return;
489			memerr:
490			fprintf(stderr, "%s: out of memory\n", progname);
491			quit(1);
492	greg	2.9	}
493
494
495			scan2sync(r) /* synchronize grey averages and output scan */
496			int r;
497			{
498			static int nextrow = 0;
499			COLOR ctmp;
500			int ybot;
501			register int c;
502			/* average input scanlines */
503			while (nextrow < r+orad && nextrow < nrows) {
504			ybot = (long)nextrow*yres/nrows;
505			for (c = 0; c < ncols; c++) {
506			dobox(ctmp, (int)((long)c*xres/ncols),ybot, c,nextrow);
507			greybar[nextrow%obarsize][c] = bright(ctmp);
508			}
509			/* and zero output scanline */
510			bzero((char )scoutbar[nextrow%obarsize], ncolssizeof(COLOR));
511			nextrow++;
512			}
513			/* point to top scanline for output */
514			if (r-orad >= 0)
515			scanout = scoutbar[(r-orad)%obarsize];
516			else
517			scanout = NULL;
518			}
519
520
521			scan2flush() /* flush output buffer */
522			{
523			register int r;
524
525			for (r = nrows-orad; r < nrows; r++)
526			if (fwritescan(scoutbar[r%obarsize], ncols, stdout) < 0)
527			break;
528			if (fflush(stdout) < 0) {
529			fprintf(stderr, "%s: write error at end of pass2\n", progname);
530			exit(1);
531			}
532	greg	1.1	}
533
534
535			quit(code) /* remove temporary file and exit */
536			int code;
537			{
538			if (tfname != NULL)
539			unlink(tfname);
540			exit(code);
541			}