1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* pbmtoascii.c - read a PBM image and produce ASCII graphics
**
** Copyright (C) 1988, 1992 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
#include "mallocvar.h"
#include "pbm.h"
#define SQQ '\''
#define BSQ '\\'
/* Bit-map for 1x2 mode:
** 1
** 2
*/
static char const carr1x2[4] = {
/* 0 1 2 3 */
' ', '"', 'o', 'M' };
/* Bit-map for 2x4 mode (hex):
** 1 2
** 4 8
** 10 20
** 40 80
** The idea here is first to preserve geometry, then to show density.
*/
#define D08 'M'
#define D07 'H'
#define D06 '&'
#define D05 '$'
#define D04 '?'
static char const carr2x4[256] = {
/*0 1 2 3 4 5 6 7 8 9 A B C D E F */
' ',SQQ, '`','"', '-',SQQ, SQQ,SQQ, '-','`', '`','`', '-','^', '^','"',/*00-0F*/
'.',':', ':',':', '|','|', '/',D04, '/','>', '/','>', '~','+', '/','*',/*10-1F*/
'.',':', ':',':', BSQ,BSQ, '<','<', '|',BSQ, '|',D04, '~',BSQ, '+','*',/*20-2F*/
'-',':', ':',':', '~',D04, '<','<', '~','>', D04,'>', '=','b', 'd','#',/*30-3F*/
'.',':', ':',':', ':','!', '/',D04, ':',':', '/',D04, ':',D04, D04,'P',/*40-4F*/
',','i', '/',D04, '|','|', '|','T', '/',D04, '/','7', 'r','}', '/','P',/*50-5F*/
',',':', ';',D04, '>',D04, 'S','S', '/',')', '|','7', '>',D05, D05,D06,/*60-6F*/
'v',D04, D04,D05, '+','}', D05,'F', '/',D05, '/',D06, 'p','D', D06,D07,/*70-7F*/
'.',':', ':',':', ':',BSQ, ':',D04, ':',BSQ, '!',D04, ':',D04, D04,D05,/*80-8F*/
BSQ,BSQ, ':',D04, BSQ,'|', '(',D05, '<','%', D04,'Z', '<',D05, D05,D06,/*90-9F*/
',',BSQ, 'i',D04, BSQ,BSQ, D04,BSQ, '|','|', '|','T', D04,BSQ, '4','9',/*A0-AF*/
'v',D04, D04,D05, BSQ,BSQ, D05,D06, '+',D05, '{',D06, 'q',D06, D06,D07,/*B0-BF*/
'_',':', ':',D04, ':',D04, D04,D05, ':',D04, D04,D05, ':',D05, D05,D06,/*C0-CF*/
BSQ,D04, D04,D05, D04,'L', D05,'[', '<','Z', '/','Z', 'c','k', D06,'R',/*D0-DF*/
',',D04, D04,D05, '>',BSQ, 'S','S', D04,D05, 'J',']', '>',D06, '1','9',/*E0-EF*/
'o','b', 'd',D06, 'b','b', D06,'6', 'd',D06, 'd',D07, '#',D07, D07,D08 /*F0-FF*/
};
static void
pbmtoascii(FILE * const ifP,
unsigned int const gridx,
unsigned int const gridy,
const char * const carr) {
int cols, rows, format;
unsigned int ccols;
bit * bitrow; /* malloc'ed array */
char * line; /* malloc'ed array */
unsigned int row;
unsigned int * sig; /* malloc'ed array */
pbm_readpbminit(ifP, &cols, &rows, &format);
ccols = (cols + gridx - 1) / gridx;
bitrow = pbm_allocrow(cols);
MALLOCARRAY(sig, ccols);
if (sig == NULL)
pm_error("No memory for %u columns", ccols);
MALLOCARRAY_NOFAIL(line, ccols+1);
if (line == NULL)
pm_error("No memory for %u columns", ccols);
for (row = 0; row < rows; row += gridy) {
/* Get a character-row's worth of sigs. */
unsigned int b;
unsigned int subrow;
{
unsigned int col;
for (col = 0; col < ccols; ++col)
sig[col] = 0;
}
b = 1;
for (subrow = 0; subrow < gridy; ++subrow) {
if (row + subrow < rows) {
unsigned int subcol;
pbm_readpbmrow(ifP, bitrow, cols, format);
for (subcol = 0; subcol < gridx; ++subcol) {
unsigned int col, s;
for (col = subcol, s = 0; col < cols; col += gridx, ++s) {
if (bitrow[col] == PBM_BLACK)
sig[s] |= b;
}
b <<= 1;
}
}
}
{
/* Ok, now remove trailing blanks. */
unsigned int col;
unsigned int endcol;
for (endcol = ccols; endcol > 0; --endcol)
if (carr[sig[endcol-1]] != ' ')
break;
/* Copy chars to an array and print. */
for (col = 0; col < endcol; ++col)
line[col] = carr[sig[col]];
line[endcol] = '\0';
}
puts(line);
}
pbm_freerow(bitrow);
free(sig);
free(line);
}
int
main(int argc, const char ** argv) {
FILE * ifP;
int argn, gridx, gridy;
const char * carr;
const char* usage = "[-1x2|-2x4] [pbmfile]";
pm_proginit(&argc, argv);
/* Set up default parameters. */
argn = 1;
gridx = 1;
gridy = 2;
carr = carr1x2;
/* Check for flags. */
while ( argn < argc && argv[argn][0] == '-' && argv[argn][1] != '\0' )
{
if ( pm_keymatch( argv[argn], "-1x2", 2 ) )
{
gridx = 1;
gridy = 2;
carr = carr1x2;
}
else if ( pm_keymatch( argv[argn], "-2x4", 2 ) )
{
gridx = 2;
gridy = 4;
carr = carr2x4;
}
else
pm_usage( usage );
++argn;
}
if ( argn < argc )
{
ifP = pm_openr( argv[argn] );
++argn;
}
else
ifP = stdin;
if ( argn != argc )
pm_usage( usage );
pbmtoascii(ifP, gridx, gridy, carr);
pm_close(ifP);
return 0;
}
|
