blob: 98be6176675fbd0bba6baf14b8f5ceee6139f388 [file] [log] [blame]
wdenk0bbe2002002-03-14 10:00:31 +00001#include <stdio.h>
2#include <stdlib.h>
3
4#if defined(__linux__)
5#include <stdint.h>
6#else
7#ifdef __CYGWIN__
8#include "elf.h"
9#else
10#include <inttypes.h>
11#endif
12#endif
13
wdenk0bbe2002002-03-14 10:00:31 +000014typedef struct bitmap_s { /* bitmap description */
15 uint16_t width;
16 uint16_t height;
17 uint8_t palette[256*3];
18 uint8_t *data;
19} bitmap_t;
20
21#define DEFAULT_CMAP_SIZE 16 /* size of default color map */
22
23/*
24 * Neutralize little endians.
25 */
26uint16_t le_short(uint16_t x)
27{
28 uint16_t val;
29 uint8_t *p = (uint8_t *)(&x);
30
31 val = (*p++ & 0xff) << 0;
32 val |= (*p & 0xff) << 8;
33
34 return val;
35}
36
37void skip_bytes (FILE *fp, int n)
38{
39 while (n-- > 0)
40 fgetc (fp);
41}
42
43int main (int argc, char *argv[])
44{
45 int i, x;
46 FILE *fp;
47 bitmap_t bmp;
48 bitmap_t *b = &bmp;
Wolfgang Denkfd4bb672005-09-25 15:39:00 +020049 uint16_t data_offset, n_colors;
wdenk0bbe2002002-03-14 10:00:31 +000050
51 if (argc < 2) {
52 fprintf (stderr, "Usage: %s file\n", argv[0]);
53 exit (EXIT_FAILURE);
54 }
55
56 if ((fp = fopen (argv[1], "rb")) == NULL) {
57 perror (argv[1]);
58 exit (EXIT_FAILURE);
59 }
60
61 if (fgetc (fp) != 'B' || fgetc (fp) != 'M') {
62 fprintf (stderr, "%s is not a bitmap file.\n", argv[1]);
63 exit (EXIT_FAILURE);
64 }
65
wdenk8bde7f72003-06-27 21:31:46 +000066 /*
67 * read width and height of the image, and the number of colors used;
wdenk0bbe2002002-03-14 10:00:31 +000068 * ignore the rest
69 */
Wolfgang Denkfd4bb672005-09-25 15:39:00 +020070 skip_bytes (fp, 8);
71 fread (&data_offset, sizeof (uint16_t), 1, fp);
72 skip_bytes (fp, 6);
wdenk0bbe2002002-03-14 10:00:31 +000073 fread (&b->width, sizeof (uint16_t), 1, fp);
74 skip_bytes (fp, 2);
75 fread (&b->height, sizeof (uint16_t), 1, fp);
76 skip_bytes (fp, 22);
77 fread (&n_colors, sizeof (uint16_t), 1, fp);
78 skip_bytes (fp, 6);
79
80 /*
81 * Repair endianess.
82 */
Wolfgang Denkfd4bb672005-09-25 15:39:00 +020083 data_offset = le_short(data_offset);
wdenk0bbe2002002-03-14 10:00:31 +000084 b->width = le_short(b->width);
85 b->height = le_short(b->height);
86 n_colors = le_short(n_colors);
87
88 /* assume we are working with an 8-bit file */
89 if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) {
90 /* reserve DEFAULT_CMAP_SIZE color map entries for default map */
91 n_colors = 256 - DEFAULT_CMAP_SIZE;
92 }
93
94 printf ("/*\n"
95 " * Automatically generated by \"tools/bmp_logo\"\n"
96 " *\n"
97 " * DO NOT EDIT\n"
98 " *\n"
99 " */\n\n\n"
100 "#ifndef __BMP_LOGO_H__\n"
101 "#define __BMP_LOGO_H__\n\n"
102 "#define BMP_LOGO_WIDTH\t\t%d\n"
103 "#define BMP_LOGO_HEIGHT\t\t%d\n"
104 "#define BMP_LOGO_COLORS\t\t%d\n"
105 "#define BMP_LOGO_OFFSET\t\t%d\n"
106 "\n",
107 b->width, b->height, n_colors,
108 DEFAULT_CMAP_SIZE);
109
110 /* allocate memory */
111 if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL) {
112 fclose (fp);
113 printf ("Error allocating memory for file %s.\n", argv[1]);
114 exit (EXIT_FAILURE);
115 }
116
117 /* read and print the palette information */
118 printf ("unsigned short bmp_logo_palette[] = {\n");
119
120 for (i=0; i<n_colors; ++i) {
121 b->palette[(int)(i*3+2)] = fgetc(fp);
122 b->palette[(int)(i*3+1)] = fgetc(fp);
123 b->palette[(int)(i*3+0)] = fgetc(fp);
124 x=fgetc(fp);
125
wdenk8655b6f2004-10-09 23:25:58 +0000126 printf ("%s0x0%X%X%X,%s",
127 ((i%8) == 0) ? "\t" : " ",
wdenk0bbe2002002-03-14 10:00:31 +0000128 (b->palette[(int)(i*3+0)] >> 4) & 0x0F,
129 (b->palette[(int)(i*3+1)] >> 4) & 0x0F,
130 (b->palette[(int)(i*3+2)] >> 4) & 0x0F,
wdenk8655b6f2004-10-09 23:25:58 +0000131 ((i%8) == 7) ? "\n" : ""
wdenk0bbe2002002-03-14 10:00:31 +0000132 );
wdenk0bbe2002002-03-14 10:00:31 +0000133 }
134
Wolfgang Denkfd4bb672005-09-25 15:39:00 +0200135 /* seek to offset indicated by file header */
136 fseek(fp, (long)data_offset, SEEK_SET);
137
wdenk0bbe2002002-03-14 10:00:31 +0000138 /* read the bitmap; leave room for default color map */
139 printf ("\n");
140 printf ("};\n");
141 printf ("\n");
142 printf ("unsigned char bmp_logo_bitmap[] = {\n");
143 for (i=(b->height-1)*b->width; i>=0; i-=b->width) {
144 for (x = 0; x < b->width; x++) {
145 b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \
146 + DEFAULT_CMAP_SIZE;
147 }
148 }
149 fclose (fp);
150
151 for (i=0; i<(b->height*b->width); ++i) {
152 if ((i%8) == 0)
153 putchar ('\t');
154 printf ("0x%02X,%c",
155 b->data[i],
156 ((i%8) == 7) ? '\n' : ' '
157 );
158 }
159 printf ("\n"
160 "};\n\n"
161 "#endif /* __BMP_LOGO_H__ */\n"
162 );
163
164 return (0);
165}