src/px/mt160r.c

/* Copyright (c) 1991 Regents of the University of California */

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

/*
 *  mt160r.c - program to dump pixel file to Mannesman-Tally 160.
 *
 *     8/16/85
 */

#include  <stdio.h>

#include  "color.h"
#include  "resolu.h"

#define  NCOLS          880             /* for wide carriage */


main(argc, argv)
int  argc;
char  *argv[];
{
        int  i;
        int  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;
        COLR  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 */
        if (checkheader(input, COLRFMT, NULL) < 0) {
                fprintf(stderr, "%s: not a Radiance picture\n", fname);
                return(-1);
        }
                                /* get picture dimensions */
        if (fgetresolu(&xres, &yres, input) < 0) {
                fprintf(stderr, "%s: bad picture size\n", fname);
                return(-1);
        }
        if (xres > NCOLS) {
                fprintf(stderr, "%s: resolution mismatch\n", fname);
                return(-1);
        }

        fputs("\033[6~\033[7z", stdout);
        
        for (i = yres-1; i >= 0; i--) {
                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);
        }

        fputs("\f\033[6~", stdout);

        fclose(input);

        return(0);
}


plotscan(scan, len, y)                  /* plot a scanline */
COLR  scan[];
int  len;
int  y;
{
        static BYTE  pat[NCOLS];
        int  bpos;
        register int  i;

        if (bpos = y & 7) {

                for (i = 0; i < len; i++)
                        pat[i] |= bit(scan[i], i) << bpos;

        } else {

                fputs("\033%5", stdout);
                putchar(len & 255);
                putchar(len >> 8);

                for (i = 0; i < len; i++) {
                        pat[i] |= bit(scan[i], i);
                        putchar(pat[i]);
                        pat[i] = 0;
                }
                putchar('\r');
                putchar('\n');
        }
}


bit(clr, x)                             /* return bit for color at x */
COLR  clr;
register int  x;
{
        static int  cerr[NCOLS];
        static int  err;
        int  b, errp;
        register int  isblack;

        b = normbright(clr);
        errp = err;
        err += b + cerr[x];
        isblack = err < 128;
        if (!isblack) err -= 256;
        err /= 3;
        cerr[x] = err + errp;
        return(isblack);
}
Revision:	2.2
Committed:	Mon Dec 23 22:35:30 1991 UTC (32 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.1:	+2 -2 lines
Log Message:	removed unnecessary static declarations
#	User	Rev	Content
1	greg	1.9	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* mt160r.c - program to dump pixel file to Mannesman-Tally 160.
9			*
10			* 8/16/85
11			*/
12
13			#include <stdio.h>
14
15			#include "color.h"
16	greg	1.9	#include "resolu.h"
17	greg	1.1
18			#define NCOLS 880 /* for wide carriage */
19
20
21			main(argc, argv)
22			int argc;
23			char *argv[];
24			{
25			int i;
26			int status = 0;
27
28			if (argc < 2)
29			status += printp(NULL) == -1;
30			else
31			for (i = 1; i < argc; i++)
32			status += printp(argv[i]) == -1;
33			exit(status);
34			}
35
36
37			printp(fname) /* print a picture */
38			char *fname;
39			{
40			FILE *input;
41			int xres, yres;
42	greg	1.3	COLR scanline[NCOLS];
43	greg	1.1	int i;
44
45			if (fname == NULL) {
46			input = stdin;
47			fname = "<stdin>";
48			} else if ((input = fopen(fname, "r")) == NULL) {
49			fprintf(stderr, "%s: cannot open\n", fname);
50			return(-1);
51			}
52			/* discard header */
53	greg	1.7	if (checkheader(input, COLRFMT, NULL) < 0) {
54			fprintf(stderr, "%s: not a Radiance picture\n", fname);
55			return(-1);
56			}
57	greg	1.1	/* get picture dimensions */
58	greg	1.9	if (fgetresolu(&xres, &yres, input) < 0) {
59	greg	1.1	fprintf(stderr, "%s: bad picture size\n", fname);
60			return(-1);
61			}
62			if (xres > NCOLS) {
63			fprintf(stderr, "%s: resolution mismatch\n", fname);
64			return(-1);
65			}
66
67			fputs("\033[6~\033[7z", stdout);
68
69			for (i = yres-1; i >= 0; i--) {
70	greg	1.3	if (freadcolrs(scanline, xres, input) < 0) {
71	greg	1.1	fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
72			return(-1);
73			}
74	greg	1.6	normcolrs(scanline, xres, 0);
75	greg	1.1	plotscan(scanline, xres, i);
76			}
77
78			fputs("\f\033[6~", stdout);
79
80			fclose(input);
81
82			return(0);
83			}
84
85
86			plotscan(scan, len, y) /* plot a scanline */
87	greg	1.3	COLR scan[];
88	greg	1.1	int len;
89			int y;
90			{
91			static BYTE pat[NCOLS];
92			int bpos;
93			register int i;
94
95			if (bpos = y & 7) {
96
97			for (i = 0; i < len; i++)
98			pat[i] \|= bit(scan[i], i) << bpos;
99
100			} else {
101
102			fputs("\033%5", stdout);
103			putchar(len & 255);
104			putchar(len >> 8);
105
106			for (i = 0; i < len; i++) {
107			pat[i] \|= bit(scan[i], i);
108			putchar(pat[i]);
109			pat[i] = 0;
110			}
111			putchar('\r');
112			putchar('\n');
113			}
114			}
115
116
117	greg	1.3	bit(clr, x) /* return bit for color at x */
118			COLR clr;
119	greg	1.1	register int x;
120			{
121	greg	1.3	static int cerr[NCOLS];
122	greg	2.2	static int err;
123			int b, errp;
124	greg	1.1	register int isblack;
125
126	greg	1.4	b = normbright(clr);
127	greg	1.8	errp = err;
128	greg	1.1	err += b + cerr[x];
129	greg	1.3	isblack = err < 128;
130			if (!isblack) err -= 256;
131	greg	1.8	err /= 3;
132			cerr[x] = err + errp;
133	greg	1.1	return(isblack);
134			}