1 |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
|
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 |
#ifdef MSDOS |
15 |
#include <fcntl.h> |
16 |
#endif |
17 |
|
18 |
#include "color.h" |
19 |
#include "resolu.h" |
20 |
|
21 |
#define NCOLS 880 /* for wide carriage */ |
22 |
|
23 |
|
24 |
main(argc, argv) |
25 |
int argc; |
26 |
char *argv[]; |
27 |
{ |
28 |
int i; |
29 |
int status = 0; |
30 |
#ifdef MSDOS |
31 |
extern int _fmode; |
32 |
_fmode = O_BINARY; |
33 |
setmode(fileno(stdin), O_BINARY); |
34 |
setmode(fileno(stdout), O_BINARY); |
35 |
#endif |
36 |
if (argc < 2) |
37 |
status += printp(NULL) == -1; |
38 |
else |
39 |
for (i = 1; i < argc; i++) |
40 |
status += printp(argv[i]) == -1; |
41 |
exit(status); |
42 |
} |
43 |
|
44 |
|
45 |
printp(fname) /* print a picture */ |
46 |
char *fname; |
47 |
{ |
48 |
FILE *input; |
49 |
int xres, yres; |
50 |
COLR scanline[NCOLS]; |
51 |
int i; |
52 |
|
53 |
if (fname == NULL) { |
54 |
input = stdin; |
55 |
fname = "<stdin>"; |
56 |
} else if ((input = fopen(fname, "r")) == NULL) { |
57 |
fprintf(stderr, "%s: cannot open\n", fname); |
58 |
return(-1); |
59 |
} |
60 |
/* discard header */ |
61 |
if (checkheader(input, COLRFMT, NULL) < 0) { |
62 |
fprintf(stderr, "%s: not a Radiance picture\n", fname); |
63 |
return(-1); |
64 |
} |
65 |
/* get picture dimensions */ |
66 |
if (fgetresolu(&xres, &yres, input) < 0) { |
67 |
fprintf(stderr, "%s: bad picture size\n", fname); |
68 |
return(-1); |
69 |
} |
70 |
if (xres > NCOLS) { |
71 |
fprintf(stderr, "%s: resolution mismatch\n", fname); |
72 |
return(-1); |
73 |
} |
74 |
|
75 |
fputs("\033[6~\033[7z", stdout); |
76 |
|
77 |
for (i = yres-1; i >= 0; i--) { |
78 |
if (freadcolrs(scanline, xres, input) < 0) { |
79 |
fprintf(stderr, "%s: read error (y=%d)\n", fname, i); |
80 |
return(-1); |
81 |
} |
82 |
normcolrs(scanline, xres, 0); |
83 |
plotscan(scanline, xres, i); |
84 |
} |
85 |
|
86 |
fputs("\f\033[6~", stdout); |
87 |
|
88 |
fclose(input); |
89 |
|
90 |
return(0); |
91 |
} |
92 |
|
93 |
|
94 |
plotscan(scan, len, y) /* plot a scanline */ |
95 |
COLR scan[]; |
96 |
int len; |
97 |
int y; |
98 |
{ |
99 |
static BYTE pat[NCOLS]; |
100 |
int bpos; |
101 |
register int i; |
102 |
|
103 |
if (bpos = y & 7) { |
104 |
|
105 |
for (i = 0; i < len; i++) |
106 |
pat[i] |= bit(scan[i], i) << bpos; |
107 |
|
108 |
} else { |
109 |
|
110 |
fputs("\033%5", stdout); |
111 |
putchar(len & 255); |
112 |
putchar(len >> 8); |
113 |
|
114 |
for (i = 0; i < len; i++) { |
115 |
pat[i] |= bit(scan[i], i); |
116 |
putchar(pat[i]); |
117 |
pat[i] = 0; |
118 |
} |
119 |
putchar('\r'); |
120 |
putchar('\n'); |
121 |
fflush(stdout); |
122 |
} |
123 |
} |
124 |
|
125 |
|
126 |
bit(clr, x) /* return bit for color at x */ |
127 |
COLR clr; |
128 |
register int x; |
129 |
{ |
130 |
static int cerr[NCOLS]; |
131 |
static int err; |
132 |
int b, errp; |
133 |
register int isblack; |
134 |
|
135 |
b = normbright(clr); |
136 |
errp = err; |
137 |
err += b + cerr[x]; |
138 |
isblack = err < 128; |
139 |
if (!isblack) err -= 256; |
140 |
err /= 3; |
141 |
cerr[x] = err + errp; |
142 |
return(isblack); |
143 |
} |