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
|
#include <stdio.h>
#include <stdlib.h>
#if defined(__linux__)
#include <stdint.h>
#else
#ifdef __CYGWIN__
#include "elf.h"
#else
#include <inttypes.h>
#endif
#endif
typedef struct bitmap_s { /* bitmap description */
uint16_t width;
uint16_t height;
uint8_t palette[256*3];
uint8_t *data;
} bitmap_t;
#define DEFAULT_CMAP_SIZE 16 /* size of default color map */
/*
* Neutralize little endians.
*/
uint16_t le_short(uint16_t x)
{
uint16_t val;
uint8_t *p = (uint8_t *)(&x);
val = (*p++ & 0xff) << 0;
val |= (*p & 0xff) << 8;
return val;
}
void skip_bytes (FILE *fp, int n)
{
while (n-- > 0)
fgetc (fp);
}
int main (int argc, char *argv[])
{
int i, x;
FILE *fp;
bitmap_t bmp;
bitmap_t *b = &bmp;
uint16_t n_colors;
if (argc < 2) {
fprintf (stderr, "Usage: %s file\n", argv[0]);
exit (EXIT_FAILURE);
}
if ((fp = fopen (argv[1], "rb")) == NULL) {
perror (argv[1]);
exit (EXIT_FAILURE);
}
if (fgetc (fp) != 'B' || fgetc (fp) != 'M') {
fprintf (stderr, "%s is not a bitmap file.\n", argv[1]);
exit (EXIT_FAILURE);
}
/*
* read width and height of the image, and the number of colors used;
* ignore the rest
*/
skip_bytes (fp, 16);
fread (&b->width, sizeof (uint16_t), 1, fp);
skip_bytes (fp, 2);
fread (&b->height, sizeof (uint16_t), 1, fp);
skip_bytes (fp, 22);
fread (&n_colors, sizeof (uint16_t), 1, fp);
skip_bytes (fp, 6);
/*
* Repair endianess.
*/
b->width = le_short(b->width);
b->height = le_short(b->height);
n_colors = le_short(n_colors);
/* assume we are working with an 8-bit file */
if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) {
/* reserve DEFAULT_CMAP_SIZE color map entries for default map */
n_colors = 256 - DEFAULT_CMAP_SIZE;
}
printf ("/*\n"
" * Automatically generated by \"tools/bmp_logo\"\n"
" *\n"
" * DO NOT EDIT\n"
" *\n"
" */\n\n\n"
"#ifndef __BMP_LOGO_H__\n"
"#define __BMP_LOGO_H__\n\n"
"#define BMP_LOGO_WIDTH\t\t%d\n"
"#define BMP_LOGO_HEIGHT\t\t%d\n"
"#define BMP_LOGO_COLORS\t\t%d\n"
"#define BMP_LOGO_OFFSET\t\t%d\n"
"\n",
b->width, b->height, n_colors,
DEFAULT_CMAP_SIZE);
/* allocate memory */
if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL) {
fclose (fp);
printf ("Error allocating memory for file %s.\n", argv[1]);
exit (EXIT_FAILURE);
}
/* read and print the palette information */
printf ("unsigned short bmp_logo_palette[] = {\n");
for (i=0; i<n_colors; ++i) {
b->palette[(int)(i*3+2)] = fgetc(fp);
b->palette[(int)(i*3+1)] = fgetc(fp);
b->palette[(int)(i*3+0)] = fgetc(fp);
x=fgetc(fp);
#if 0
if ((i%4) == 0)
putchar ('\t');
printf ("0x%02X, 0x%02X, 0x%02X,%s",
b->palette[(int)(i*3+0)],
b->palette[(int)(i*3+1)],
b->palette[(int)(i*3+2)],
((i%4) == 3) ? "\n" : " "
);
#else
if ((i%8) == 0)
putchar ('\t');
printf ("0x0%X%X%X,%s",
(b->palette[(int)(i*3+0)] >> 4) & 0x0F,
(b->palette[(int)(i*3+1)] >> 4) & 0x0F,
(b->palette[(int)(i*3+2)] >> 4) & 0x0F,
((i%8) == 7) ? "\n" : " "
);
#endif
}
/* read the bitmap; leave room for default color map */
printf ("\n");
printf ("};\n");
printf ("\n");
printf ("unsigned char bmp_logo_bitmap[] = {\n");
for (i=(b->height-1)*b->width; i>=0; i-=b->width) {
for (x = 0; x < b->width; x++) {
b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \
+ DEFAULT_CMAP_SIZE;
}
}
fclose (fp);
for (i=0; i<(b->height*b->width); ++i) {
if ((i%8) == 0)
putchar ('\t');
printf ("0x%02X,%c",
b->data[i],
((i%8) == 7) ? '\n' : ' '
);
}
printf ("\n"
"};\n\n"
"#endif /* __BMP_LOGO_H__ */\n"
);
return (0);
}
|
