--- ray/src/px/oki20c.c	1989/02/02 10:49:21	1.1
+++ ray/src/px/oki20c.c	1992/07/03 10:46:25	2.8
@@ -1,4 +1,4 @@
-/* Copyright (c) 1986 Regents of the University of California */
+/* Copyright (c) 1992 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -6,31 +6,44 @@ static char SCCSid[] = "$SunId$ LBL";
 
 /*
  *  oki20c.c - program to dump pixel file to OkiMate 20 color printer.
- *
- *     6/10/87
  */
 
 #include  <stdio.h>
 
 #include  "color.h"
+#include  "resolu.h"
 
-
 #define  NROWS		1440		/* 10" at 144 dpi */
 #define  NCOLS		960		/* 8" at 120 dpi */
 
+#define  ASPECT		(120./144.)	/* pixel aspect ratio */
+
+#define  FILTER		"pfilt -1 -x %d -y %d -p %f %s",NCOLS,NROWS,ASPECT
+
 /*
  *  Subtractive primaries are ordered:  Yellow, Magenta, Cyan.
  */
 
 #define  sub_add(sub)	(2-(sub))	/* map subtractive to additive pri. */
 
+long  lpat[NCOLS][3];
 
+int  dofilter = 0;		/* filter through pfilt first? */
+
+
 main(argc, argv)
 int  argc;
 char  *argv[];
 {
 	int  i, status = 0;
 	
+	if (argc > 1 && !strcmp(argv[1], "-p")) {
+		dofilter++;
+		argv++; argc--;
+	}
+#ifdef _IOLBF
+	stdout->_flag &= ~_IOLBF;
+#endif
 	if (argc < 2)
 		status = printp(NULL) == -1;
 	else
@@ -43,12 +56,23 @@ char  *argv[];
 printp(fname)				/* print a picture */
 char  *fname;
 {
+	char  buf[64];
 	FILE  *input;
 	int  xres, yres;
-	COLOR  scanline[NCOLS];
+	COLR  scanline[NCOLS];
 	int  i;
 
-	if (fname == NULL) {
+	if (dofilter) {
+		if (fname == NULL) {
+			sprintf(buf, FILTER, "");
+			fname = "<stdin>";
+		} else
+			sprintf(buf, FILTER, fname);
+		if ((input = popen(buf, "r")) == NULL) {
+			fprintf(stderr, "Cannot execute: %s\n", buf);
+			return(-1);
+		}
+	} else if (fname == NULL) {
 		input = stdin;
 		fname = "<stdin>";
 	} else if ((input = fopen(fname, "r")) == NULL) {
@@ -56,89 +80,104 @@ char  *fname;
 		return(-1);
 	}
 				/* discard header */
-	getheader(input, NULL);
+	if (checkheader(input, COLRFMT, NULL) < 0) {
+		fprintf(stderr, "%s: not a Radiance picture\n", fname);
+		return(-1);
+	}
 				/* get picture dimensions */
-	if (fscanf(input, "-Y %d +X %d\n", &yres, &xres) != 2) {
+	if (fgetresolu(&xres, &yres, input) < 0) {
 		fprintf(stderr, "%s: bad picture size\n", fname);
 		return(-1);
 	}
-	if (xres > NCOLS || yres > NROWS) {
+	if (xres > NCOLS) {
 		fprintf(stderr, "%s: resolution mismatch\n", fname);
 		return(-1);
 	}
-
-	fputs("\033A\014\0332", stdout);
-	
+				/* set line spacing (overlap for knitting) */
+	fputs("\0333\042", stdout);
+				/* put out scanlines */
 	for (i = yres-1; i >= 0; i--) {
-		if (freadscan(scanline, xres, input) < 0) {
+		if (freadcolrs(scanline, xres, input) < 0) {
 			fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
 			return(-1);
 		}
+		normcolrs(scanline, xres, 0);
 		plotscan(scanline, xres, i);
 	}
-
+				/* advance page */
 	putchar('\f');
 	
-	fclose(input);
+	if (dofilter)
+		pclose(input);
+	else
+		fclose(input);
 
 	return(0);
 }
 
 
 plotscan(scan, len, y)			/* plot a scanline */
-COLOR  scan[];
+COLR  scan[];
 int  len;
 int  y;
 {
-	static long  pat[NCOLS][3];
 	int  bpos;
 	register long  c;
 	register int  i, j;
 
-	if (bpos = y % 24) {
+	if (bpos = y % 23) {
 
 		for (j = 0; j < 3; j++)
 			for (i = 0; i < len; i++)
-				pat[i][j] |= (long)colbit(scan[i],i,j) << bpos;
+				lpat[i][j] |= (long)colbit(scan[i],i,j) << bpos;
+		return;
+	}
+	fputs("\033\031", stdout);
 
-	} else {
-
-		fputs("\033\031", stdout);
-
-		for (j = 0; j < 3; j++) {
-			fputs("\033%O", stdout);
-			putchar(len & 255);
-			putchar(len >> 8);
-			for (i = 0; i < len; i++) {
-				c = pat[i][j] | colbit(scan[i],i,j);
-				pat[i][j] = 0;
-				putchar(c>>16);
-				putchar(c>>8 & 255);
-				putchar(c & 255);
-			}
-			putchar('\r');
+	for (j = 0; j < 3; j++) {
+		i = (NCOLS + len)/2;		/* center image */
+		fputs("\033%O", stdout);
+		putchar(i & 255);
+		putchar(i >> 8);
+		while (i-- > len) {
+			putchar(0);
+			putchar(0);
+			putchar(0);
 		}
-		putchar('\n');
+		for (i = 0; i < len; i++) {
+			c = lpat[i][j] | colbit(scan[i],i,j);
+			putchar(c>>16);
+			putchar(c>>8 & 255);
+			putchar(c & 255);
+			if (y)			/* repeat this row */
+				lpat[i][j] = (c & 1) << 23;
+			else			/* or clear for next image */
+				lpat[i][j] = 0L;
+		}
+		putchar('\r');
 	}
+	putchar('\n');
+	fflush(stdout);
 }
 
 
 colbit(col, x, s)		/* determine bit value for primary at x */
-COLOR  col;
+COLR  col;
 register int  x;
 int  s;
 {
-	static float  cerr[NCOLS][3];
-	static double  err[3];
-	double  b;
+	static int  cerr[NCOLS][3];
+	static int  err[3];
+	int  b, errp;
 	register int  a, ison;
 
 	a = sub_add(s);			/* use additive primary */
-	b = colval(col,a);
-	if (b > 1.0) b = 1.0;
+	b = col[a];
+	errp = err[a];
 	err[a] += b + cerr[x][a];
-	ison = err[a] < 0.5;
-	if (!ison) err[a] -= 1.0;
-	cerr[x][a] = err[a] *= 0.5;
+	ison = err[a] < 128;
+	if (!ison) err[a] -= 256;
+	err[a] /= 3;
+	cerr[x][a] = err[a] + errp;
 	return(ison);
 }