src/px/oki20c.c

/* Copyright (c) 1986 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  oki20c.c - program to dump pixel file to OkiMate 20 color printer.
 *
 *     6/10/87
 */

#include  <stdio.h>

#include  "color.h"


#define  NROWS          1440            /* 10" at 144 dpi */
#define  NCOLS          960             /* 8" at 120 dpi */

/*
 *  Subtractive primaries are ordered:  Yellow, Magenta, Cyan.
 */

#define  sub_add(sub)   (2-(sub))       /* map subtractive to additive pri. */


main(argc, argv)
int  argc;
char  *argv[];
{
        int  i, status = 0;
        
        if (argc < 2)
                status = printp(NULL) == -1;
        else
                for (i = 1; i < argc; i++)
                        status += printp(argv[i]) == -1;
        exit(status);
}


printp(fname)                           /* print a picture */
char  *fname;
{
        FILE  *input;
        int  xres, yres;
        COLOR  scanline[NCOLS];
        int  i;

        if (fname == NULL) {
                input = stdin;
                fname = "<stdin>";
        } else if ((input = fopen(fname, "r")) == NULL) {
                fprintf(stderr, "%s: cannot open\n", fname);
                return(-1);
        }
                                /* discard header */
        getheader(input, NULL);
                                /* get picture dimensions */
        if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) {
                fprintf(stderr, "%s: bad picture size\n", fname);
                return(-1);
        }
        if (xres > NCOLS || yres > NROWS) {
                fprintf(stderr, "%s: resolution mismatch\n", fname);
                return(-1);
        }
                                /* set line spacing (overlap for knitting) */
        fputs("\0333\036", stdout);
                                /* put out scanlines */
        for (i = yres-1; i >= 0; i--) {
                if (freadscan(scanline, xres, input) < 0) {
                        fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
                        return(-1);
                }
                plotscan(scanline, xres, i);
        }
                                /* advance page */
        putchar('\f');
        
        fclose(input);

        return(0);
}


plotscan(scan, len, y)                  /* plot a scanline */
COLOR  scan[];
int  len;
int  y;
{
        static long  pat[NCOLS][3];
        int  bpos;
        register long  c;
        register int  i, j;

        if (bpos = y % 20) {

                if (y > 20 & bpos < 4)                  /* knit bits */
                        for (j = 0; j < 3; j++)
                                for (i = 0; i < len; i++)
                                        pat[i][j] |= (long)colbit(scan[i],i,j)
                                                << (i+j & 4 ? bpos+24 : bpos);
                else
                        for (j = 0; j < 3; j++)
                                for (i = 0; i < len; i++)
                                        pat[i][j] |= (long)colbit(scan[i],i,j)
                                                        << bpos;

        } else {

                fputs("\033\031", stdout);

                for (j = 0; j < 3; j++) {
                        fputs("\033%O", stdout);
                        putchar(len & 0xff);
                        putchar(len >> 8);
                        for (i = 0; i < len; i++) {
                                c = pat[i][j];
                                pat[i][j] = c>>4 & 0xf00000;
                                if (i+j & 4)            /* knit last bit */
                                        pat[i][j] |= colbit(scan[i],i,j) << 20;
                                else
                                        c |= colbit(scan[i],i,j);
                                putchar(c>>16 & 0xff);
                                putchar(c>>8 & 0xff);
                                putchar(c & 0xff);
                        }
                        putchar('\r');
                }
                putchar('\n');
        }
}


colbit(col, x, s)               /* determine bit value for primary at x */
COLOR  col;
register int  x;
int  s;
{
        static float  cerr[NCOLS][3];
        static double  err[3];
        double  b;
        register int  a, ison;

        a = sub_add(s);                 /* use additive primary */
        b = colval(col,a);
        if (b > 1.0) b = 1.0;
        err[a] += b + cerr[x][a];
        ison = err[a] < 0.5;
        if (!ison) err[a] -= 1.0;
        cerr[x][a] = err[a] *= 0.5;
        return(ison);
}
Revision:	1.4
Committed:	Fri Oct 20 12:07:08 1989 UTC (34 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+22 -16 lines
Log Message:	changed to 4x4 knit
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1986 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* oki20c.c - program to dump pixel file to OkiMate 20 color printer.
9			*
10			* 6/10/87
11			*/
12
13			#include <stdio.h>
14
15			#include "color.h"
16
17
18			#define NROWS 1440 /* 10" at 144 dpi */
19			#define NCOLS 960 /* 8" at 120 dpi */
20
21			/*
22			* Subtractive primaries are ordered: Yellow, Magenta, Cyan.
23			*/
24
25			#define sub_add(sub) (2-(sub)) /* map subtractive to additive pri. */
26
27
28			main(argc, argv)
29			int argc;
30			char *argv[];
31			{
32			int i, status = 0;
33
34			if (argc < 2)
35			status = printp(NULL) == -1;
36			else
37			for (i = 1; i < argc; i++)
38			status += printp(argv[i]) == -1;
39			exit(status);
40			}
41
42
43			printp(fname) /* print a picture */
44			char *fname;
45			{
46			FILE *input;
47			int xres, yres;
48			COLOR scanline[NCOLS];
49			int i;
50
51			if (fname == NULL) {
52			input = stdin;
53			fname = "<stdin>";
54			} else if ((input = fopen(fname, "r")) == NULL) {
55			fprintf(stderr, "%s: cannot open\n", fname);
56			return(-1);
57			}
58			/* discard header */
59			getheader(input, NULL);
60			/* get picture dimensions */
61	greg	1.2	if (fgetresolu(&xres, &yres, input) != (YMAJOR\|YDECR)) {
62	greg	1.1	fprintf(stderr, "%s: bad picture size\n", fname);
63			return(-1);
64			}
65			if (xres > NCOLS \|\| yres > NROWS) {
66			fprintf(stderr, "%s: resolution mismatch\n", fname);
67			return(-1);
68			}
69	greg	1.3	/* set line spacing (overlap for knitting) */
70	greg	1.4	fputs("\0333\036", stdout);
71	greg	1.3	/* put out scanlines */
72	greg	1.1	for (i = yres-1; i >= 0; i--) {
73			if (freadscan(scanline, xres, input) < 0) {
74			fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
75			return(-1);
76			}
77			plotscan(scanline, xres, i);
78			}
79	greg	1.3	/* advance page */
80	greg	1.1	putchar('\f');
81
82			fclose(input);
83
84			return(0);
85			}
86
87
88			plotscan(scan, len, y) /* plot a scanline */
89			COLOR scan[];
90			int len;
91			int y;
92			{
93			static long pat[NCOLS][3];
94			int bpos;
95			register long c;
96			register int i, j;
97
98	greg	1.4	if (bpos = y % 20) {
99	greg	1.1
100	greg	1.4	if (y > 20 & bpos < 4) /* knit bits */
101			for (j = 0; j < 3; j++)
102			for (i = 0; i < len; i++)
103			pat[i][j] \|= (long)colbit(scan[i],i,j)
104			<< (i+j & 4 ? bpos+24 : bpos);
105			else
106			for (j = 0; j < 3; j++)
107			for (i = 0; i < len; i++)
108			pat[i][j] \|= (long)colbit(scan[i],i,j)
109			<< bpos;
110	greg	1.1
111			} else {
112
113			fputs("\033\031", stdout);
114
115			for (j = 0; j < 3; j++) {
116			fputs("\033%O", stdout);
117	greg	1.4	putchar(len & 0xff);
118	greg	1.1	putchar(len >> 8);
119			for (i = 0; i < len; i++) {
120	greg	1.4	c = pat[i][j];
121			pat[i][j] = c>>4 & 0xf00000;
122			if (i+j & 4) /* knit last bit */
123			pat[i][j] \|= colbit(scan[i],i,j) << 20;
124			else
125			c \|= colbit(scan[i],i,j);
126			putchar(c>>16 & 0xff);
127			putchar(c>>8 & 0xff);
128			putchar(c & 0xff);
129	greg	1.1	}
130			putchar('\r');
131			}
132			putchar('\n');
133			}
134			}
135
136
137			colbit(col, x, s) /* determine bit value for primary at x */
138			COLOR col;
139			register int x;
140			int s;
141			{
142			static float cerr[NCOLS][3];
143			static double err[3];
144			double b;
145			register int a, ison;
146
147			a = sub_add(s); /* use additive primary */
148			b = colval(col,a);
149			if (b > 1.0) b = 1.0;
150			err[a] += b + cerr[x][a];
151			ison = err[a] < 0.5;
152			if (!ison) err[a] -= 1.0;
153			cerr[x][a] = err[a] *= 0.5;
154			return(ison);
155			}