src/px/pfilt.c

#ifndef lint
static const char RCSid[] = "$Id: pfilt.c,v 2.39 2023/12/15 01:57:45 greg Exp $";
#endif
/*
 *  pfilt.c - program to post-process picture file.
 *
 *     9/26/85
 *     6/23/93  Added additional buffers for value spreading
 */

#include  "copyright.h"

#include  <signal.h>
#include  "pfilt.h"
#include  "platform.h"
#include  "paths.h"
#include  "view.h"

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

double   CHECKRAD = 2.0;        /* 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  template[] = TEMPLATE;

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;

VIEW  ourview = STDVIEW;
int  gotview = 0;
int  wrapfilt = 0;              /* wrap filter horizontally? */

int  estatus = 0;               /* exit status (for non-fatal errors) */

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 */
COLORV  **scanin;               /* input scan bar */
COLORV  *scanout;               /* output scan line */
COLORV  **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 */

static void copyfile(FILE  *infp, FILE  *out);
static void pass1(FILE  *infp);
static void pass2(FILE  *infp);
static void scan2init(void);
static void scan2sync(int  r);
static void scan2flush(void);


static double
rgb_bright(
        SCOLOR  clr
)
{
        return(bright(clr));
}


static double
xyz_bright(
        SCOLOR  clr
)
{
        return(colval(clr,CIEY));
}


static double
spec_bright(
        SCOLOR  clr
)
{
        return(pbright(clr));
}


brightfunc_t    *ourbright = rgb_bright;


static int
headline(                               /* process line from header */
        char    *s,
        void    *p
)
{
        char  fmt[MAXFMTLEN];

        fputs(s, stdout);               /* copy to output */
        if (isaspect(s))                /* get aspect ratio */
                inpaspect *= aspectval(s);
        else if (isexpos(s))            /* get exposure */
                hotlvl *= exposval(s);
        else if (isncomp(s))            /* get #components (spectral) */
                NCSAMP = ncompval(s);
        else if (iswlsplit(s))          /* get wavelength partitions */
                wlsplitval(WLPART, s);
        else if (formatval(fmt, s)) {   /* get format */
                wrongformat = 0;
                if (!strcmp(COLRFMT, fmt))
                        ourbright = rgb_bright;
                else if (!strcmp(CIEFMT, fmt))
                        ourbright = xyz_bright;
                else if (!strcmp(SPECFMT, fmt))
                        ourbright = spec_bright;
                else
                        wrongformat = !globmatch(PICFMT, fmt);
        } else if (isview(s) && sscanview(&ourview, s) > 0)
                gotview++;
        return(0);
}


int
main(
        int  argc,
        char  **argv
)
{
        FILE  *fin;
        float  *lampcolor;
        char  *lamptype = NULL;
        long  fpos;
        double  outaspect = 0.0;
        double  d;
        int  i, j;

        fixargv0(argv[0]);              /* sets global progname */
        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        if (signal(SIGINT, quit) == SIG_IGN)
                signal(SIGINT, SIG_IGN);
#ifdef SIGHUP
        if (signal(SIGHUP, quit) == SIG_IGN)
                signal(SIGHUP, SIG_IGN);
#endif
        signal(SIGTERM, quit);
#ifdef SIGPIPE
        signal(SIGPIPE, quit);
#endif
#ifdef  SIGXCPU
        signal(SIGXCPU, quit);
        signal(SIGXFSZ, quit);
#endif
        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",
                                                        progname);
                                        quit(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 = 0.6;
                                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 (j = 0; j < 3; j++)
                        if (lampcolor[j] > 1e-4)
                                colval(exposure,j) /= lampcolor[j];
                freelamps();
        }
                                        /* open input file */
        if (i == argc) {
                if (singlepass)
                        fin = stdin;
                else {
                        tfname = mktemp(template);
                        if ((fin = fopen(tfname, "w+b")) == 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], "rb")) == 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);
        }
        if ((ourbright == spec_bright) ^ (NCSAMP > 3) ||
                        setspectrsamp(CNDX, WLPART) < 0) {
                fprintf(stderr, "%s: bad number of components\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;
                                        /* wrap around for cylindrical view? */
        wrapfilt = gotview && ourview.type == VT_CYL &&
                        ourview.horiz >= 360.-FTINY && order & YMAJOR;
                                        /* 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(estatus);
        return estatus; /* pro forma return */
}


static void
copyfile(                       /* copy a file */
        FILE  *infp,
        FILE  *out
)
{
        int  c;

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

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


static void
pass1(                          /* first pass of picture file */
        FILE  *infp
)
{
        int  i;
        COLORV  *scan;

        pass1init();

        scan = (COLORV *)malloc(xres*NCSAMP*sizeof(COLORV));
        if (scan == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                quit(1);
        }
        for (i = 0; i < yres; i++) {
                if (freadsscan(scan, NCSAMP, xres, infp) < 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;
                        estatus++;
                        break;
                }
                pass1scan(scan, i);
        }
        free(scan);
}


static void
pass2(                  /* last pass on file, write to stdout */
        FILE  *infp
)
{
        int  yread;
        int  ycent, xcent;
        int  r, c;
        
        pass2init();
        scan2init();
        yread = 0;
        for (r = 0; r < nrows; r++) {
                ycent = (r+.5)*yres/nrows;
                while (yread <= ycent+yrad) {
                        if (yread < yres) {
                                if (freadsscan(scanin[yread%barsize],
                                                NCSAMP, xres, infp) < 0) {
                                        fprintf(stderr,
                                                "%s: truncated input (y=%d)\n",
                                                progname, yres-1-yread);
                                        quit(1);
                                }
                                pass2scan(scanin[yread%barsize], yread);
                        }
                        yread++;
                }
                if (obarsize > 0)       /* => thresh > FTINY */
                        scan2sync(r);
                for (c = 0; c < ncols; c++) {
                        xcent = (c+.5)*xres/ncols;
                        if (thresh > FTINY)
                                dothresh(xcent, ycent, c, r);
                        else if (rad > FTINY)
                                dogauss(scanout+c*NCSAMP, xcent, ycent, c, r);
                        else
                                dobox(scanout+c*NCSAMP, xcent, ycent, c, r);
                }
                if (scanout != NULL && fwritesscan(scanout, NCSAMP, ncols, stdout) < 0) {
                        fprintf(stderr, "%s: write error in pass2\n", progname);
                        quit(1);
                }
        }
                                        /* skip leftover input */
        while (yread < yres) {
                if (freadscolrs((uby8 *)tempbuffer(xres*(NCSAMP+1)),
                                        NCSAMP, xres, infp) < 0)
                        break;
                yread++;
        }
        scan2flush();                   /* flush output */
}


static void
scan2init(void)                 /* prepare scanline arrays */
{
        COLOR   ctmp;
        double  d;
        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) {
                        orad = CHECKRAD*THRESHRAD*rad + 1;
                        xrad = orad/x_c + xbrad;
                        yrad = orad/y_r + ybrad;
                        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 = (COLORV **)malloc(barsize*sizeof(COLORV *));
        if (scanin == NULL)
                goto memerr;
        for (i = 0; i < barsize; i++) {
                scanin[i] = (COLORV *)malloc(xres*NCSAMP*sizeof(COLORV));
                if (scanin[i] == NULL)
                        goto memerr;
        }
        if (obarsize > 0) {
                scoutbar = (COLORV **)malloc(obarsize*sizeof(COLORV *));
                greybar = (float **)malloc(obarsize*sizeof(float *));
                if ((scoutbar == NULL) | (greybar == NULL))
                        goto memerr;
                for (i = 0; i < obarsize; i++) {
                        scoutbar[i] = (COLORV *)malloc(ncols*NCSAMP*sizeof(COLORV));
                        greybar[i] = (float *)malloc(ncols*sizeof(float));
                        if ((scoutbar[i] == NULL) | (greybar[i] == NULL))
                                goto memerr;
                }
        } else {
                scanout = (COLORV *)malloc(ncols*NCSAMP*sizeof(COLORV));
                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);
}


static void
scan2sync(                      /* synchronize grey averages and output scan */
        int  r
)
{
        static int  nextrow = 0;
        SCOLOR  ctmp;
        int  ybot;
        int  c;
                                        /* average input scanlines */
        while (nextrow <= r+orad && nextrow < nrows) {
                ybot = (nextrow+.5)*yres/nrows;
                for (c = 0; c < ncols; c++) {
                        dobox(ctmp, (int)((c+.5)*xres/ncols),ybot, c,nextrow);
                        greybar[nextrow%obarsize][c] = (*ourbright)(ctmp);
                }
                                        /* and zero output scanline */
                memset(scoutbar[nextrow%obarsize], 0, ncols*NCSAMP*sizeof(COLORV));
                nextrow++;
        }
                                        /* point to top scanline for output */
        if (r-orad >= 0)
                scanout = scoutbar[(r-orad)%obarsize];
        else
                scanout = NULL;
}


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

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


void
quit(code)              /* remove temporary file and exit */
int  code;
{
        if (tfname != NULL)
                unlink(tfname);
        exit(code);
}
Revision:	2.40
Committed:	Tue Jun 3 21:31:51 2025 UTC (45 hours, 4 minutes ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.39:	+4 -7 lines
Log Message:	refactor: More consistent use of global char * progname and fixargv0()
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.40	static const char RCSid[] = "$Id: pfilt.c,v 2.39 2023/12/15 01:57:45 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* pfilt.c - program to post-process picture file.
6			*
7			* 9/26/85
8	greg	2.9	* 6/23/93 Added additional buffers for value spreading
9	greg	1.1	*/
10
11	schorsch	2.25	#include "copyright.h"
12
13	greg	1.1	#include <signal.h>
14	greg	2.35	#include "pfilt.h"
15	greg	2.27	#include "platform.h"
16	greg	2.35	#include "paths.h"
17	greg	2.17	#include "view.h"
18	greg	1.1
19	greg	2.4	#define FEQ(a,b) ((a) >= .98(b) && (a) <= 1.02(b))
20	greg	1.15
21	greg	2.22	double CHECKRAD = 2.0; /* radius to check for filtering */
22	greg	1.1
23	greg	2.9	#define THRESHRAD 5.0 /* maximum sample spread in output */
24
25	greg	1.1	COLOR exposure = WHTCOLOR; /* exposure for the frame */
26
27	greg	2.4	double rad = 0.0; /* output pixel radius for filtering */
28	greg	1.1
29	greg	2.9	double thresh = 0.0; /* maximum contribution for subpixel */
30
31	greg	1.1	int nrows = 0; /* number of rows for output */
32			int ncols = 0; /* number of columns for output */
33
34	greg	2.4	double x_c = 1.0; /* ratio of output x size to input */
35			double y_r = 1.0; /* ratio of output y size to input */
36	greg	1.2
37	greg	1.1	int singlepass = 0; /* true means skip first pass */
38
39			int avghot = 0; /* true means average in bright spots */
40
41	greg	2.8	double hotlvl = 100.0; /* level considered "hot" */
42	greg	1.1
43			int npts = 0; /* (half) number of points for stars */
44
45	greg	2.4	double spread = 1e-4; /* spread for star points */
46	greg	1.1
47			char *tfname = NULL;
48
49	greg	2.11	char template[] = TEMPLATE;
50
51	greg	1.13	char lampdat = "lamp.tab"; / lamp data file */
52
53	greg	1.19	int order; /* scanline ordering of input */
54	greg	1.1	int xres, yres; /* resolution of input */
55	greg	2.4	double inpaspect = 1.0; /* pixel aspect ratio of input */
56	greg	1.12	int correctaspect = 0; /* aspect ratio correction? */
57	greg	1.1
58	greg	1.16	int wrongformat = 0;
59
60	greg	2.17	VIEW ourview = STDVIEW;
61			int gotview = 0;
62			int wrapfilt = 0; /* wrap filter horizontally? */
63
64	greg	2.18	int estatus = 0; /* exit status (for non-fatal errors) */
65
66	greg	2.9	int xrad; /* x search radius */
67			int yrad; /* y search radius */
68			int xbrad; /* x box size */
69			int ybrad; /* y box size */
70	greg	1.1
71			int barsize; /* size of input scan bar */
72	greg	2.36	COLORV *scanin; / input scan bar */
73			COLORV scanout; / output scan line */
74			COLORV *scoutbar; / output scan bar (if thresh > 0) */
75	greg	2.9	float *greybar; / grey-averaged input values */
76			int obarsize = 0; /* size of output scan bar */
77			int orad = 0; /* output window radius */
78	greg	1.1
79	greg	2.39	static void copyfile(FILE infp, FILE out);
80			static void pass1(FILE *infp);
81			static void pass2(FILE *infp);
82	schorsch	2.29	static void scan2init(void);
83			static void scan2sync(int r);
84			static void scan2flush(void);
85	schorsch	2.28
86	greg	1.1
87	greg	2.39	static double
88			rgb_bright(
89			SCOLOR clr
90			)
91			{
92			return(bright(clr));
93			}
94
95
96			static double
97			xyz_bright(
98			SCOLOR clr
99			)
100			{
101			return(colval(clr,CIEY));
102			}
103
104
105			static double
106			spec_bright(
107			SCOLOR clr
108			)
109			{
110			return(pbright(clr));
111			}
112
113
114			brightfunc_t *ourbright = rgb_bright;
115
116
117			static int
118			headline( /* process line from header */
119			char *s,
120			void *p
121			)
122			{
123			char fmt[MAXFMTLEN];
124
125			fputs(s, stdout); /* copy to output */
126			if (isaspect(s)) /* get aspect ratio */
127			inpaspect *= aspectval(s);
128			else if (isexpos(s)) /* get exposure */
129			hotlvl *= exposval(s);
130			else if (isncomp(s)) /* get #components (spectral) */
131			NCSAMP = ncompval(s);
132			else if (iswlsplit(s)) /* get wavelength partitions */
133			wlsplitval(WLPART, s);
134			else if (formatval(fmt, s)) { /* get format */
135			wrongformat = 0;
136			if (!strcmp(COLRFMT, fmt))
137			ourbright = rgb_bright;
138			else if (!strcmp(CIEFMT, fmt))
139			ourbright = xyz_bright;
140			else if (!strcmp(SPECFMT, fmt))
141			ourbright = spec_bright;
142			else
143			wrongformat = !globmatch(PICFMT, fmt);
144			} else if (isview(s) && sscanview(&ourview, s) > 0)
145			gotview++;
146			return(0);
147			}
148
149
150	schorsch	2.29	int
151			main(
152			int argc,
153			char **argv
154			)
155	greg	1.1	{
156			FILE *fin;
157	greg	1.13	float *lampcolor;
158			char *lamptype = NULL;
159	greg	1.1	long fpos;
160	greg	2.4	double outaspect = 0.0;
161			double d;
162	greg	2.13	int i, j;
163	greg	2.40
164			fixargv0(argv[0]); /* sets global progname */
165	schorsch	2.23	SET_DEFAULT_BINARY();
166			SET_FILE_BINARY(stdin);
167			SET_FILE_BINARY(stdout);
168	greg	1.1	if (signal(SIGINT, quit) == SIG_IGN)
169			signal(SIGINT, SIG_IGN);
170	schorsch	2.24	#ifdef SIGHUP
171	greg	1.1	if (signal(SIGHUP, quit) == SIG_IGN)
172	greg	2.11	signal(SIGHUP, SIG_IGN);
173	schorsch	2.24	#endif
174	greg	1.1	signal(SIGTERM, quit);
175	schorsch	2.24	#ifdef SIGPIPE
176	greg	1.1	signal(SIGPIPE, quit);
177	schorsch	2.24	#endif
178	greg	2.4	#ifdef SIGXCPU
179	greg	1.1	signal(SIGXCPU, quit);
180			signal(SIGXFSZ, quit);
181			#endif
182			for (i = 1; i < argc; i++)
183			if (argv[i][0] == '-')
184			switch (argv[i][1]) {
185			case 'x':
186	greg	1.3	i++;
187	greg	1.5	if (argv[i][0] == '/') {
188	greg	1.4	x_c = 1.0/atof(argv[i]+1);
189	greg	1.5	ncols = 0;
190			} else
191	greg	1.3	ncols = atoi(argv[i]);
192	greg	1.1	break;
193			case 'y':
194	greg	1.3	i++;
195	greg	1.5	if (argv[i][0] == '/') {
196	greg	1.4	y_r = 1.0/atof(argv[i]+1);
197	greg	1.5	nrows = 0;
198			} else
199	greg	1.3	nrows = atoi(argv[i]);
200	greg	1.1	break;
201	greg	1.12	case 'c':
202			correctaspect = !correctaspect;
203			break;
204	greg	1.9	case 'p':
205			i++;
206			outaspect = atof(argv[i]);
207			break;
208	greg	1.1	case 'e':
209			if (argv[i+1][0] == '+' \|\| argv[i+1][0] == '-')
210			d = pow(2.0, atof(argv[i+1]));
211			else
212			d = atof(argv[i+1]);
213	greg	1.15	if (d < 1e-20 \|\| d > 1e20) {
214			fprintf(stderr,
215			"%s: exposure out of range\n",
216	greg	2.40	progname);
217	greg	2.18	quit(1);
218	greg	1.15	}
219	greg	1.1	switch (argv[i][2]) {
220			case '\0':
221			scalecolor(exposure, d);
222			break;
223			case 'r':
224			colval(exposure,RED) *= d;
225			break;
226			case 'g':
227			colval(exposure,GRN) *= d;
228			break;
229			case 'b':
230			colval(exposure,BLU) *= d;
231			break;
232			default:
233			goto badopt;
234			}
235			i++;
236			break;
237	greg	1.13	case 'f':
238			lampdat = argv[++i];
239			break;
240			case 't':
241			lamptype = argv[++i];
242			break;
243	greg	1.1	case '1':
244			singlepass = 1;
245			break;
246	greg	1.6	case '2':
247			singlepass = 0;
248			break;
249	greg	1.9	case 'n':
250	greg	1.1	npts = atoi(argv[++i]) / 2;
251			break;
252			case 's':
253			spread = atof(argv[++i]);
254			break;
255			case 'a':
256			avghot = !avghot;
257			break;
258			case 'h':
259			hotlvl = atof(argv[++i]);
260			break;
261			case 'r':
262			rad = atof(argv[++i]);
263			break;
264	greg	2.9	case 'm':
265			thresh = atof(argv[++i]);
266			if (rad <= FTINY)
267	greg	2.21	rad = 0.6;
268	greg	2.9	break;
269	greg	1.1	case 'b':
270	greg	2.9	rad = thresh = 0.0;
271	greg	1.1	break;
272			default:;
273			badopt:
274			fprintf(stderr, "%s: unknown option: %s\n",
275			progname, argv[i]);
276			quit(1);
277			break;
278			}
279			else
280			break;
281	greg	1.14	/* get lamp data (if necessary) */
282			if (lamptype != NULL) {
283			if (loadlamps(lampdat) < 0)
284			quit(1);
285			if ((lampcolor = matchlamp(lamptype)) == NULL) {
286			fprintf(stderr, "%s: unknown lamp type\n", lamptype);
287			quit(1);
288			}
289	greg	2.13	for (j = 0; j < 3; j++)
290			if (lampcolor[j] > 1e-4)
291			colval(exposure,j) /= lampcolor[j];
292	greg	1.14	freelamps();
293			}
294			/* open input file */
295	greg	1.1	if (i == argc) {
296			if (singlepass)
297			fin = stdin;
298			else {
299	greg	2.11	tfname = mktemp(template);
300	greg	2.38	if ((fin = fopen(tfname, "w+b")) == NULL) {
301	greg	1.1	fprintf(stderr, "%s: can't create ", progname);
302			fprintf(stderr, "temp file \"%s\"\n", tfname);
303			quit(1);
304			}
305			copyfile(stdin, fin);
306			if (fseek(fin, 0L, 0) == -1) {
307			fprintf(stderr, "%s: seek fail\n", progname);
308			quit(1);
309			}
310			}
311			} else if (i == argc-1) {
312	greg	2.38	if ((fin = fopen(argv[i], "rb")) == NULL) {
313	greg	1.1	fprintf(stderr, "%s: can't open file \"%s\"\n",
314			progname, argv[i]);
315			quit(1);
316			}
317			} else {
318			fprintf(stderr, "%s: bad # file arguments\n", progname);
319			quit(1);
320			}
321	greg	1.9	/* get header */
322	greg	1.16	getheader(fin, headline, NULL);
323			if (wrongformat) {
324			fprintf(stderr, "%s: input must be a Radiance picture\n",
325			progname);
326			quit(1);
327			}
328	greg	2.39	if ((ourbright == spec_bright) ^ (NCSAMP > 3) \|\|
329			setspectrsamp(CNDX, WLPART) < 0) {
330	greg	2.36	fprintf(stderr, "%s: bad number of components\n", progname);
331			quit(1);
332			}
333	greg	1.1	/* add new header info. */
334			printargs(i, argv, stdout);
335			/* get picture size */
336	greg	1.19	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
337	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
338			quit(1);
339			}
340	greg	1.19	if (!(order & YMAJOR))
341			inpaspect = 1.0/inpaspect;
342	greg	2.17	/* wrap around for cylindrical view? */
343			wrapfilt = gotview && ourview.type == VT_CYL &&
344			ourview.horiz >= 360.-FTINY && order & YMAJOR;
345	greg	1.9	/* compute output resolution */
346			if (ncols <= 0)
347	greg	1.4	ncols = x_c*xres + .5;
348	greg	1.9	if (nrows <= 0)
349	greg	1.4	nrows = y_r*yres + .5;
350	greg	1.9	if (outaspect > .01) {
351			d = inpaspect * yres/xres / outaspect;
352			if (d * ncols > nrows)
353			ncols = nrows / d;
354			else
355			nrows = ncols * d;
356			}
357			x_c = (double)ncols/xres;
358			y_r = (double)nrows/yres;
359	greg	1.1
360	greg	1.9	if (singlepass) { /* skip exposure, etc. */
361	greg	1.1	pass1default();
362			pass2(fin);
363			quit(0);
364			}
365
366			fpos = ftell(fin); /* save input file position */
367
368			pass1(fin);
369
370			if (fseek(fin, fpos, 0) == -1) {
371			fprintf(stderr, "%s: seek fail\n", progname);
372			quit(1);
373			}
374			pass2(fin);
375
376	greg	2.18	quit(estatus);
377	schorsch	2.29	return estatus; /* pro forma return */
378	greg	1.1	}
379
380
381	schorsch	2.29	static void
382			copyfile( /* copy a file */
383	greg	2.39	FILE *infp,
384	greg	2.32	FILE *out
385	schorsch	2.29	)
386	greg	1.1	{
387	greg	2.32	int c;
388	greg	1.1
389	greg	2.39	while ((c = getc(infp)) != EOF)
390	greg	1.1	putc(c, out);
391
392			if (ferror(out)) {
393			fprintf(stderr, "%s: write error in copyfile\n", progname);
394			quit(1);
395			}
396			}
397
398
399	schorsch	2.29	static void
400			pass1( /* first pass of picture file */
401	greg	2.39	FILE *infp
402	schorsch	2.29	)
403	greg	1.1	{
404			int i;
405	greg	2.36	COLORV *scan;
406	greg	1.1
407			pass1init();
408
409	greg	2.36	scan = (COLORV )malloc(xresNCSAMP*sizeof(COLORV));
410	greg	1.1	if (scan == NULL) {
411			fprintf(stderr, "%s: out of memory\n", progname);
412			quit(1);
413			}
414			for (i = 0; i < yres; i++) {
415	greg	2.39	if (freadsscan(scan, NCSAMP, xres, infp) < 0) {
416	greg	2.7	nrows = (long)nrows * i / yres; /* adjust frame */
417	greg	1.1	if (nrows <= 0) {
418			fprintf(stderr, "%s: empty frame\n", progname);
419			quit(1);
420			}
421			fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
422	greg	2.7	progname, (int)(100L*i/yres));
423	greg	1.1	yres = i;
424	greg	1.11	y_r = (double)nrows/yres;
425	greg	2.18	estatus++;
426	greg	1.1	break;
427			}
428			pass1scan(scan, i);
429			}
430	greg	2.36	free(scan);
431	greg	1.1	}
432
433
434	schorsch	2.29	static void
435			pass2( /* last pass on file, write to stdout */
436	greg	2.39	FILE *infp
437	schorsch	2.29	)
438	greg	1.1	{
439			int yread;
440			int ycent, xcent;
441			int r, c;
442	greg	2.4
443	greg	1.1	pass2init();
444			scan2init();
445			yread = 0;
446			for (r = 0; r < nrows; r++) {
447	greg	2.19	ycent = (r+.5)*yres/nrows;
448	greg	1.1	while (yread <= ycent+yrad) {
449			if (yread < yres) {
450	greg	2.36	if (freadsscan(scanin[yread%barsize],
451	greg	2.39	NCSAMP, xres, infp) < 0) {
452	greg	1.1	fprintf(stderr,
453	greg	2.14	"%s: truncated input (y=%d)\n",
454	greg	1.1	progname, yres-1-yread);
455			quit(1);
456			}
457			pass2scan(scanin[yread%barsize], yread);
458			}
459			yread++;
460			}
461	greg	2.39	if (obarsize > 0) /* => thresh > FTINY */
462	greg	2.9	scan2sync(r);
463	greg	1.1	for (c = 0; c < ncols; c++) {
464	greg	2.19	xcent = (c+.5)*xres/ncols;
465	greg	2.9	if (thresh > FTINY)
466			dothresh(xcent, ycent, c, r);
467			else if (rad > FTINY)
468	greg	2.36	dogauss(scanout+c*NCSAMP, xcent, ycent, c, r);
469	greg	2.9	else
470	greg	2.36	dobox(scanout+c*NCSAMP, xcent, ycent, c, r);
471	greg	1.1	}
472	greg	2.36	if (scanout != NULL && fwritesscan(scanout, NCSAMP, ncols, stdout) < 0) {
473	greg	1.1	fprintf(stderr, "%s: write error in pass2\n", progname);
474			quit(1);
475			}
476			}
477	greg	2.9	/* skip leftover input */
478	greg	1.10	while (yread < yres) {
479	greg	2.39	if (freadscolrs((uby8 )tempbuffer(xres(NCSAMP+1)),
480			NCSAMP, xres, infp) < 0)
481	greg	1.10	break;
482			yread++;
483			}
484	greg	2.9	scan2flush(); /* flush output */
485	greg	1.1	}
486
487
488	schorsch	2.29	static void
489			scan2init(void) /* prepare scanline arrays */
490	greg	1.1	{
491	greg	1.15	COLOR ctmp;
492	greg	2.4	double d;
493	greg	2.32	int i;
494	greg	1.1
495	greg	2.9	xbrad = xres/ncols/2 + 1;
496			ybrad = yres/nrows/2 + 1;
497			if (rad > FTINY) {
498	greg	1.1	if (nrows >= yres && ncols >= xres)
499			rad *= (y_r + x_c)/2.0;
500
501	greg	2.9	if (thresh > FTINY) {
502			orad = CHECKRADTHRESHRADrad + 1;
503	greg	2.16	xrad = orad/x_c + xbrad;
504			yrad = orad/y_r + ybrad;
505	greg	2.9	obarsize = 2*orad + 1;
506			} else {
507			xrad = CHECKRAD*rad/x_c + 1;
508			yrad = CHECKRAD*rad/y_r + 1;
509			}
510	greg	1.1	initmask(); /* initialize filter table */
511	greg	2.9	} else {
512			xrad = xbrad;
513			yrad = ybrad;
514	greg	1.1	}
515	greg	1.17	barsize = 2*yrad + 1;
516	greg	2.36	scanin = (COLORV *)malloc(barsizesizeof(COLORV *));
517	greg	2.10	if (scanin == NULL)
518			goto memerr;
519	greg	1.1	for (i = 0; i < barsize; i++) {
520	greg	2.36	scanin[i] = (COLORV )malloc(xresNCSAMP*sizeof(COLORV));
521	greg	2.10	if (scanin[i] == NULL)
522			goto memerr;
523	greg	1.1	}
524	greg	2.9	if (obarsize > 0) {
525	greg	2.36	scoutbar = (COLORV *)malloc(obarsizesizeof(COLORV *));
526	greg	2.9	greybar = (float *)malloc(obarsizesizeof(float *));
527	schorsch	2.26	if ((scoutbar == NULL) \| (greybar == NULL))
528	greg	2.10	goto memerr;
529	greg	2.9	for (i = 0; i < obarsize; i++) {
530	greg	2.36	scoutbar[i] = (COLORV )malloc(ncolsNCSAMP*sizeof(COLORV));
531	greg	2.9	greybar[i] = (float )malloc(ncolssizeof(float));
532	schorsch	2.26	if ((scoutbar[i] == NULL) \| (greybar[i] == NULL))
533	greg	2.10	goto memerr;
534	greg	2.9	}
535			} else {
536	greg	2.36	scanout = (COLORV )malloc(ncolsNCSAMP*sizeof(COLORV));
537	greg	2.10	if (scanout == NULL)
538			goto memerr;
539	greg	1.1	}
540	greg	1.15	/* record pixel aspect ratio */
541	greg	1.12	if (!correctaspect) {
542	greg	1.19	d = order & YMAJOR ? x_c/y_r : y_r/x_c ;
543	greg	1.15	if (!FEQ(d,1.0))
544	greg	1.12	fputaspect(d, stdout);
545			}
546	greg	1.15	/* record exposure */
547	greg	2.36	d = bright(exposure);
548	greg	1.15	if (!FEQ(d,1.0))
549	greg	1.9	fputexpos(d, stdout);
550	greg	1.15	/* record color correction */
551			copycolor(ctmp, exposure);
552			scalecolor(ctmp, 1.0/d);
553			if (!FEQ(colval(ctmp,RED),colval(ctmp,GRN)) \|\|
554			!FEQ(colval(ctmp,GRN),colval(ctmp,BLU)))
555			fputcolcor(ctmp, stdout);
556	greg	1.1	printf("\n");
557	greg	1.15	/* write out resolution */
558	greg	1.19	fputresolu(order, ncols, nrows, stdout);
559	greg	2.10	return;
560			memerr:
561			fprintf(stderr, "%s: out of memory\n", progname);
562			quit(1);
563	greg	2.9	}
564
565
566	schorsch	2.29	static void
567			scan2sync( /* synchronize grey averages and output scan */
568			int r
569			)
570	greg	2.9	{
571			static int nextrow = 0;
572	greg	2.36	SCOLOR ctmp;
573	greg	2.9	int ybot;
574	greg	2.32	int c;
575	greg	2.9	/* average input scanlines */
576	greg	2.16	while (nextrow <= r+orad && nextrow < nrows) {
577	greg	2.19	ybot = (nextrow+.5)*yres/nrows;
578	greg	2.9	for (c = 0; c < ncols; c++) {
579	greg	2.19	dobox(ctmp, (int)((c+.5)*xres/ncols),ybot, c,nextrow);
580	greg	2.15	greybar[nextrow%obarsize][c] = (*ourbright)(ctmp);
581	greg	2.9	}
582			/* and zero output scanline */
583	greg	2.36	memset(scoutbar[nextrow%obarsize], 0, ncolsNCSAMPsizeof(COLORV));
584	greg	2.9	nextrow++;
585			}
586			/* point to top scanline for output */
587			if (r-orad >= 0)
588			scanout = scoutbar[(r-orad)%obarsize];
589			else
590			scanout = NULL;
591			}
592
593
594	schorsch	2.29	static void
595			scan2flush(void) /* flush output buffer */
596	greg	2.9	{
597	greg	2.32	int r;
598	greg	2.9
599			for (r = nrows-orad; r < nrows; r++)
600	greg	2.36	if (fwritesscan(scoutbar[r%obarsize], NCSAMP, ncols, stdout) < 0)
601	greg	2.9	break;
602			if (fflush(stdout) < 0) {
603			fprintf(stderr, "%s: write error at end of pass2\n", progname);
604	greg	2.18	quit(1);
605	greg	2.9	}
606	greg	1.1	}
607
608
609	greg	2.21	void
610	greg	1.1	quit(code) /* remove temporary file and exit */
611			int code;
612			{
613			if (tfname != NULL)
614			unlink(tfname);
615			exit(code);
616			}