--- ray/src/px/pfilt.c	1996/10/02 16:56:16	2.19
+++ ray/src/px/pfilt.c	2023/12/09 02:33:14	2.37
@@ -1,9 +1,6 @@
-/* Copyright (c) 1996 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char RCSid[] = "$Id: pfilt.c,v 2.37 2023/12/09 02:33:14 greg Exp $";
 #endif
-
 /*
  *  pfilt.c - program to post-process picture file.
  *
@@ -11,23 +8,17 @@ static char SCCSid[] = "$SunId$ LBL";
  *     6/23/93	Added additional buffers for value spreading
  */
 
-#include  "standard.h"
+#include  "copyright.h"
 
 #include  <signal.h>
-
-#include  "color.h"
-
+#include  "pfilt.h"
+#include  "platform.h"
+#include  "paths.h"
 #include  "view.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 */
+double	 CHECKRAD = 2.0;	/* radius to check for filtering */
 
 #define  THRESHRAD	5.0	/* maximum sample spread in output */
 
@@ -78,22 +69,30 @@ 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) */
+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 */
 
 char  *progname;
 
+static gethfunc headline;
+static void copyfile(FILE  *in, FILE  *out);
+static void pass1(FILE  *in);
+static void pass2(FILE  *in);
+static void scan2init(void);
+static void scan2sync(int  r);
+static void scan2flush(void);
 
-main(argc, argv)
-int  argc;
-char  **argv;
+
+int
+main(
+	int  argc,
+	char  **argv
+)
 {
-	extern long  ftell();
-	extern int  quit(), headline();
 	FILE  *fin;
 	float  *lampcolor;
 	char  *lamptype = NULL;
@@ -101,18 +100,19 @@ char  **argv;
 	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
+	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);
@@ -205,7 +205,7 @@ char  **argv;
 			case 'm':
 				thresh = atof(argv[++i]);
 				if (rad <= FTINY)
-					rad = 1.0;
+					rad = 0.6;
 				break;
 			case 'b':
 				rad = thresh = 0.0;
@@ -266,6 +266,10 @@ char  **argv;
 				progname);
 		quit(1);
 	}
+	if (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 */
@@ -310,55 +314,79 @@ char  **argv;
 	pass2(fin);
 
 	quit(estatus);
+	return estatus; /* pro forma return */
 }
 
 
-double
-rgb_bright(clr)
-COLOR  clr;
+static double
+rgb_bright(
+	SCOLOR  clr
+)
 {
 	return(bright(clr));
 }
 
 
-double
-xyz_bright(clr)
-COLOR  clr;
+static double
+xyz_bright(
+	SCOLOR  clr
+)
 {
-	return(clr[CIEY]);
+	return(colval(clr,CIEY));
 }
 
 
-double	(*ourbright)() = rgb_bright;
+static double
+spec_bright(
+	SCOLOR  clr
+)
+{
+	return(pbright(clr));
+}
 
 
-headline(s)				/* process line from header */
-char  *s;
+brightfunc_t *ourbright = rgb_bright;
+
+static int
+headline(				/* process line from header */
+	char	*s,
+	void	*p
+)
 {
-	char  fmt[32];
+	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);
 }
 
 
-copyfile(in, out)			/* copy a file */
-register FILE  *in, *out;
+static void
+copyfile(			/* copy a file */
+	FILE  *in,
+	FILE  *out
+)
 {
-	register int  c;
+	int  c;
 
 	while ((c = getc(in)) != EOF)
 		putc(c, out);
@@ -370,21 +398,23 @@ register FILE  *in, *out;
 }
 
 
-pass1(in)				/* first pass of picture file */
-FILE  *in;
+static void
+pass1(				/* first pass of picture file */
+	FILE  *in
+)
 {
 	int  i;
-	COLOR  *scan;
+	COLORV  *scan;
 
 	pass1init();
 
-	scan = (COLOR *)malloc(xres*sizeof(COLOR));
+	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 (freadscan(scan, xres, in) < 0) {
+		if (freadsscan(scan, NCSAMP, xres, in) < 0) {
 			nrows = (long)nrows * i / yres;	/* adjust frame */
 			if (nrows <= 0) {
 				fprintf(stderr, "%s: empty frame\n", progname);
@@ -399,12 +429,14 @@ FILE  *in;
 		}
 		pass1scan(scan, i);
 	}
-	free((char *)scan);
+	free(scan);
 }
 
 
-pass2(in)			/* last pass on file, write to stdout */
-FILE  *in;
+static void
+pass2(			/* last pass on file, write to stdout */
+	FILE  *in
+)
 {
 	int  yread;
 	int  ycent, xcent;
@@ -417,8 +449,8 @@ FILE  *in;
 		ycent = (r+.5)*yres/nrows;
 		while (yread <= ycent+yrad) {
 			if (yread < yres) {
-				if (freadscan(scanin[yread%barsize],
-						xres, in) < 0) {
+				if (freadsscan(scanin[yread%barsize],
+						NCSAMP, xres, in) < 0) {
 					fprintf(stderr,
 						"%s: truncated input (y=%d)\n",
 						progname, yres-1-yread);
@@ -435,18 +467,18 @@ FILE  *in;
 			if (thresh > FTINY)
 				dothresh(xcent, ycent, c, r);
 			else if (rad > FTINY)
-				dogauss(scanout[c], xcent, ycent, c, r);
+				dogauss(scanout+c*NCSAMP, xcent, ycent, c, r);
 			else
-				dobox(scanout[c], xcent, ycent, c, r);
+				dobox(scanout+c*NCSAMP, xcent, ycent, c, r);
 		}
-		if (scanout != NULL && fwritescan(scanout, ncols, stdout) < 0) {
+		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 (freadscan(scanin[0], xres, in) < 0)
+		if (freadsscan(scanin[0], NCSAMP, xres, in) < 0)
 			break;
 		yread++;
 	}
@@ -454,11 +486,12 @@ FILE  *in;
 }
 
 
-scan2init()			/* prepare scanline arrays */
+static void
+scan2init(void)			/* prepare scanline arrays */
 {
 	COLOR	ctmp;
 	double	d;
-	register int  i;
+	int  i;
 
 	xbrad = xres/ncols/2 + 1;
 	ybrad = yres/nrows/2 + 1;
@@ -481,27 +514,27 @@ scan2init()			/* prepare scanline arrays */
 		yrad = ybrad;
 	}
 	barsize = 2*yrad + 1;
-	scanin = (COLOR **)malloc(barsize*sizeof(COLOR *));
+	scanin = (COLORV **)malloc(barsize*sizeof(COLORV *));
 	if (scanin == NULL)
 		goto memerr;
 	for (i = 0; i < barsize; i++) {
-		scanin[i] = (COLOR *)malloc(xres*sizeof(COLOR));
+		scanin[i] = (COLORV *)malloc(xres*NCSAMP*sizeof(COLORV));
 		if (scanin[i] == NULL)
 			goto memerr;
 	}
 	if (obarsize > 0) {
-		scoutbar = (COLOR **)malloc(obarsize*sizeof(COLOR *));
+		scoutbar = (COLORV **)malloc(obarsize*sizeof(COLORV *));
 		greybar = (float **)malloc(obarsize*sizeof(float *));
-		if (scoutbar == NULL | greybar == NULL)
+		if ((scoutbar == NULL) | (greybar == NULL))
 			goto memerr;
 		for (i = 0; i < obarsize; i++) {
-			scoutbar[i] = (COLOR *)malloc(ncols*sizeof(COLOR));
+			scoutbar[i] = (COLORV *)malloc(ncols*NCSAMP*sizeof(COLORV));
 			greybar[i] = (float *)malloc(ncols*sizeof(float));
-			if (scoutbar[i] == NULL | greybar[i] == NULL)
+			if ((scoutbar[i] == NULL) | (greybar[i] == NULL))
 				goto memerr;
 		}
 	} else {
-		scanout = (COLOR *)malloc(ncols*sizeof(COLOR));
+		scanout = (COLORV *)malloc(ncols*NCSAMP*sizeof(COLORV));
 		if (scanout == NULL)
 			goto memerr;
 	}
@@ -512,7 +545,7 @@ scan2init()			/* prepare scanline arrays */
 			fputaspect(d, stdout);
 	}
 					/* record exposure */
-	d = (*ourbright)(exposure);
+	d = bright(exposure);
 	if (!FEQ(d,1.0))
 		fputexpos(d, stdout);
 					/* record color correction */
@@ -531,13 +564,15 @@ memerr:
 }
 
 
-scan2sync(r)			/* synchronize grey averages and output scan */
-int  r;
+static void
+scan2sync(			/* synchronize grey averages and output scan */
+	int  r
+)
 {
 	static int  nextrow = 0;
-	COLOR  ctmp;
+	SCOLOR  ctmp;
 	int  ybot;
-	register int  c;
+	int  c;
 					/* average input scanlines */
 	while (nextrow <= r+orad && nextrow < nrows) {
 		ybot = (nextrow+.5)*yres/nrows;
@@ -546,7 +581,7 @@ int  r;
 			greybar[nextrow%obarsize][c] = (*ourbright)(ctmp);
 		}
 					/* and zero output scanline */
-		bzero((char *)scoutbar[nextrow%obarsize], ncols*sizeof(COLOR));
+		memset(scoutbar[nextrow%obarsize], 0, ncols*NCSAMP*sizeof(COLORV));
 		nextrow++;
 	}
 					/* point to top scanline for output */
@@ -557,12 +592,13 @@ int  r;
 }
 
 
-scan2flush()			/* flush output buffer */
+static void
+scan2flush(void)			/* flush output buffer */
 {
-	register int  r;
+	int  r;
 
 	for (r = nrows-orad; r < nrows; r++)
-		if (fwritescan(scoutbar[r%obarsize], ncols, stdout) < 0)
+		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);
@@ -571,6 +607,7 @@ scan2flush()			/* flush output buffer */
 }
 
 
+void
 quit(code)		/* remove temporary file and exit */
 int  code;
 {