Commit 0bbe2005ea208b12a4d96f28bf20c27abec97727
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tools/bmp_logo.c
1 | +#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 | + | |
14 | +#ifdef __CYGWIN__ | |
15 | +typedef unsigned short ushort; | |
16 | +#endif /* __CYGWIN__ */ | |
17 | + | |
18 | + | |
19 | +typedef struct bitmap_s { /* bitmap description */ | |
20 | + uint16_t width; | |
21 | + uint16_t height; | |
22 | + uint8_t palette[256*3]; | |
23 | + uint8_t *data; | |
24 | +} bitmap_t; | |
25 | + | |
26 | +#define DEFAULT_CMAP_SIZE 16 /* size of default color map */ | |
27 | + | |
28 | +/* | |
29 | + * Neutralize little endians. | |
30 | + */ | |
31 | +uint16_t le_short(uint16_t x) | |
32 | +{ | |
33 | + uint16_t val; | |
34 | + uint8_t *p = (uint8_t *)(&x); | |
35 | + | |
36 | + val = (*p++ & 0xff) << 0; | |
37 | + val |= (*p & 0xff) << 8; | |
38 | + | |
39 | + return val; | |
40 | +} | |
41 | + | |
42 | +void skip_bytes (FILE *fp, int n) | |
43 | +{ | |
44 | + while (n-- > 0) | |
45 | + fgetc (fp); | |
46 | +} | |
47 | + | |
48 | +int main (int argc, char *argv[]) | |
49 | +{ | |
50 | + int i, x; | |
51 | + FILE *fp; | |
52 | + bitmap_t bmp; | |
53 | + bitmap_t *b = &bmp; | |
54 | + uint16_t n_colors; | |
55 | + | |
56 | + if (argc < 2) { | |
57 | + fprintf (stderr, "Usage: %s file\n", argv[0]); | |
58 | + exit (EXIT_FAILURE); | |
59 | + } | |
60 | + | |
61 | + if ((fp = fopen (argv[1], "rb")) == NULL) { | |
62 | + perror (argv[1]); | |
63 | + exit (EXIT_FAILURE); | |
64 | + } | |
65 | + | |
66 | + if (fgetc (fp) != 'B' || fgetc (fp) != 'M') { | |
67 | + fprintf (stderr, "%s is not a bitmap file.\n", argv[1]); | |
68 | + exit (EXIT_FAILURE); | |
69 | + } | |
70 | + | |
71 | + /* | |
72 | + * read width and height of the image, and the number of colors used; | |
73 | + * ignore the rest | |
74 | + */ | |
75 | + skip_bytes (fp, 16); | |
76 | + fread (&b->width, sizeof (uint16_t), 1, fp); | |
77 | + skip_bytes (fp, 2); | |
78 | + fread (&b->height, sizeof (uint16_t), 1, fp); | |
79 | + skip_bytes (fp, 22); | |
80 | + fread (&n_colors, sizeof (uint16_t), 1, fp); | |
81 | + skip_bytes (fp, 6); | |
82 | + | |
83 | + /* | |
84 | + * Repair endianess. | |
85 | + */ | |
86 | + b->width = le_short(b->width); | |
87 | + b->height = le_short(b->height); | |
88 | + n_colors = le_short(n_colors); | |
89 | + | |
90 | + /* assume we are working with an 8-bit file */ | |
91 | + if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) { | |
92 | + /* reserve DEFAULT_CMAP_SIZE color map entries for default map */ | |
93 | + n_colors = 256 - DEFAULT_CMAP_SIZE; | |
94 | + } | |
95 | + | |
96 | + printf ("/*\n" | |
97 | + " * Automatically generated by \"tools/bmp_logo\"\n" | |
98 | + " *\n" | |
99 | + " * DO NOT EDIT\n" | |
100 | + " *\n" | |
101 | + " */\n\n\n" | |
102 | + "#ifndef __BMP_LOGO_H__\n" | |
103 | + "#define __BMP_LOGO_H__\n\n" | |
104 | + "#define BMP_LOGO_WIDTH\t\t%d\n" | |
105 | + "#define BMP_LOGO_HEIGHT\t\t%d\n" | |
106 | + "#define BMP_LOGO_COLORS\t\t%d\n" | |
107 | + "#define BMP_LOGO_OFFSET\t\t%d\n" | |
108 | + "\n", | |
109 | + b->width, b->height, n_colors, | |
110 | + DEFAULT_CMAP_SIZE); | |
111 | + | |
112 | + /* allocate memory */ | |
113 | + if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL) { | |
114 | + fclose (fp); | |
115 | + printf ("Error allocating memory for file %s.\n", argv[1]); | |
116 | + exit (EXIT_FAILURE); | |
117 | + } | |
118 | + | |
119 | + /* read and print the palette information */ | |
120 | + printf ("unsigned short bmp_logo_palette[] = {\n"); | |
121 | + | |
122 | + for (i=0; i<n_colors; ++i) { | |
123 | + b->palette[(int)(i*3+2)] = fgetc(fp); | |
124 | + b->palette[(int)(i*3+1)] = fgetc(fp); | |
125 | + b->palette[(int)(i*3+0)] = fgetc(fp); | |
126 | + x=fgetc(fp); | |
127 | + | |
128 | +#if 0 | |
129 | + if ((i%4) == 0) | |
130 | + putchar ('\t'); | |
131 | + printf ("0x%02X, 0x%02X, 0x%02X,%s", | |
132 | + b->palette[(int)(i*3+0)], | |
133 | + b->palette[(int)(i*3+1)], | |
134 | + b->palette[(int)(i*3+2)], | |
135 | + ((i%4) == 3) ? "\n" : " " | |
136 | + ); | |
137 | +#else | |
138 | + if ((i%8) == 0) | |
139 | + putchar ('\t'); | |
140 | + printf ("0x0%X%X%X,%s", | |
141 | + (b->palette[(int)(i*3+0)] >> 4) & 0x0F, | |
142 | + (b->palette[(int)(i*3+1)] >> 4) & 0x0F, | |
143 | + (b->palette[(int)(i*3+2)] >> 4) & 0x0F, | |
144 | + ((i%8) == 7) ? "\n" : " " | |
145 | + ); | |
146 | +#endif | |
147 | + } | |
148 | + | |
149 | + /* read the bitmap; leave room for default color map */ | |
150 | + printf ("\n"); | |
151 | + printf ("};\n"); | |
152 | + printf ("\n"); | |
153 | + printf ("unsigned char bmp_logo_bitmap[] = {\n"); | |
154 | + for (i=(b->height-1)*b->width; i>=0; i-=b->width) { | |
155 | + for (x = 0; x < b->width; x++) { | |
156 | + b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \ | |
157 | + + DEFAULT_CMAP_SIZE; | |
158 | + } | |
159 | + } | |
160 | + fclose (fp); | |
161 | + | |
162 | + for (i=0; i<(b->height*b->width); ++i) { | |
163 | + if ((i%8) == 0) | |
164 | + putchar ('\t'); | |
165 | + printf ("0x%02X,%c", | |
166 | + b->data[i], | |
167 | + ((i%8) == 7) ? '\n' : ' ' | |
168 | + ); | |
169 | + } | |
170 | + printf ("\n" | |
171 | + "};\n\n" | |
172 | + "#endif /* __BMP_LOGO_H__ */\n" | |
173 | + ); | |
174 | + | |
175 | + return (0); | |
176 | +} |