src/px/mt160r.c

#ifndef lint
static const char       RCSid[] = "$Id: mt160r.c,v 2.7 2003/06/05 19:29:34 schorsch Exp $";
#endif
/*
 *  mt160r.c - program to dump pixel file to Mannesman-Tally 160.
 *
 *     8/16/85
 */

#include  <stdio.h>
#include  <time.h>

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

#define  NCOLS          880             /* for wide carriage */

static int printp(char  *fname);
static void plotscan(COLR  scan[], int  len, int  y);
static int bit(COLR  clr, int  x);


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


static int
printp(                         /* 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);
}


static void
plotscan(                       /* 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');
                fflush(stdout);
        }
}


static int
bit(                            /* 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:	2.8
Committed:	Sun Mar 28 20:33:14 2004 UTC (20 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R6P1, rad3R6
Changes since 2.7:	+26 -14 lines
Log Message:	Continued ANSIfication, and other fixes and clarifications.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.8	static const char RCSid[] = "$Id: mt160r.c,v 2.7 2003/06/05 19:29:34 schorsch Exp $";
3	greg	1.1	#endif
4			/*
5			* mt160r.c - program to dump pixel file to Mannesman-Tally 160.
6			*
7			* 8/16/85
8			*/
9
10			#include <stdio.h>
11	greg	2.6	#include <time.h>
12	greg	1.1
13	schorsch	2.7	#include "platform.h"
14	greg	1.1	#include "color.h"
15	greg	1.9	#include "resolu.h"
16	greg	1.1
17	greg	2.4	#define NCOLS 880 /* for wide carriage */
18	greg	1.1
19	schorsch	2.8	static int printp(char *fname);
20			static void plotscan(COLR scan[], int len, int y);
21			static int bit(COLR clr, int x);
22	greg	1.1
23	schorsch	2.8
24			int
25			main(
26			int argc,
27			char *argv[]
28			)
29	greg	1.1	{
30			int i;
31			int status = 0;
32	schorsch	2.7	SET_DEFAULT_BINARY();
33			SET_FILE_BINARY(stdin);
34			SET_FILE_BINARY(stdout);
35	greg	1.1	if (argc < 2)
36			status += printp(NULL) == -1;
37			else
38			for (i = 1; i < argc; i++)
39			status += printp(argv[i]) == -1;
40			exit(status);
41			}
42
43
44	schorsch	2.8	static int
45			printp( /* print a picture */
46			char *fname
47			)
48	greg	1.1	{
49			FILE *input;
50			int xres, yres;
51	greg	1.3	COLR scanline[NCOLS];
52	greg	1.1	int i;
53	greg	2.4
54	greg	1.1	if (fname == NULL) {
55			input = stdin;
56			fname = "<stdin>";
57			} else if ((input = fopen(fname, "r")) == NULL) {
58			fprintf(stderr, "%s: cannot open\n", fname);
59			return(-1);
60			}
61			/* discard header */
62	greg	1.7	if (checkheader(input, COLRFMT, NULL) < 0) {
63			fprintf(stderr, "%s: not a Radiance picture\n", fname);
64			return(-1);
65			}
66	greg	1.1	/* get picture dimensions */
67	greg	1.9	if (fgetresolu(&xres, &yres, input) < 0) {
68	greg	1.1	fprintf(stderr, "%s: bad picture size\n", fname);
69			return(-1);
70			}
71			if (xres > NCOLS) {
72			fprintf(stderr, "%s: resolution mismatch\n", fname);
73			return(-1);
74			}
75
76			fputs("\033[6~\033[7z", stdout);
77
78			for (i = yres-1; i >= 0; i--) {
79	greg	1.3	if (freadcolrs(scanline, xres, input) < 0) {
80	greg	1.1	fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
81			return(-1);
82			}
83	greg	1.6	normcolrs(scanline, xres, 0);
84	greg	1.1	plotscan(scanline, xres, i);
85			}
86
87			fputs("\f\033[6~", stdout);
88
89			fclose(input);
90
91			return(0);
92			}
93
94
95	schorsch	2.8	static void
96			plotscan( /* plot a scanline */
97			COLR scan[],
98			int len,
99			int y
100			)
101	greg	1.1	{
102			static BYTE pat[NCOLS];
103			int bpos;
104			register int i;
105
106	schorsch	2.8	if ((bpos = y & 7)) {
107	greg	1.1
108			for (i = 0; i < len; i++)
109			pat[i] \|= bit(scan[i], i) << bpos;
110
111			} else {
112
113			fputs("\033%5", stdout);
114			putchar(len & 255);
115			putchar(len >> 8);
116
117			for (i = 0; i < len; i++) {
118			pat[i] \|= bit(scan[i], i);
119			putchar(pat[i]);
120			pat[i] = 0;
121			}
122			putchar('\r');
123			putchar('\n');
124	greg	2.3	fflush(stdout);
125	greg	1.1	}
126			}
127
128
129	schorsch	2.8	static int
130			bit( /* return bit for color at x */
131			COLR clr,
132			register int x
133			)
134	greg	1.1	{
135	greg	1.3	static int cerr[NCOLS];
136	greg	2.2	static int err;
137			int b, errp;
138	greg	1.1	register int isblack;
139
140	greg	1.4	b = normbright(clr);
141	greg	1.8	errp = err;
142	greg	1.1	err += b + cerr[x];
143	greg	1.3	isblack = err < 128;
144			if (!isblack) err -= 256;
145	greg	1.8	err /= 3;
146			cerr[x] = err + errp;
147	greg	1.1	return(isblack);
148			}