8 typedef struct bitmap_s { /* bitmap description */
11 uint8_t palette[256*3];
15 #define DEFAULT_CMAP_SIZE 16 /* size of default color map */
17 void usage(const char *prog)
19 fprintf(stderr, "Usage: %s [--gen-info|--gen-data] file\n", prog);
23 * Neutralize little endians.
25 uint16_t le_short(uint16_t x)
28 uint8_t *p = (uint8_t *)(&x);
30 val = (*p++ & 0xff) << 0;
31 val |= (*p & 0xff) << 8;
36 void skip_bytes (FILE *fp, int n)
42 __attribute__ ((__noreturn__))
43 int error (char * msg, FILE *fp)
45 fprintf (stderr, "ERROR: %s\n", msg);
52 void gen_info(bitmap_t *b, uint16_t n_colors)
55 " * Automatically generated by \"tools/bmp_logo\"\n"
60 "#ifndef __BMP_LOGO_H__\n"
61 "#define __BMP_LOGO_H__\n\n"
62 "#define BMP_LOGO_WIDTH\t\t%d\n"
63 "#define BMP_LOGO_HEIGHT\t\t%d\n"
64 "#define BMP_LOGO_COLORS\t\t%d\n"
65 "#define BMP_LOGO_OFFSET\t\t%d\n\n"
66 "extern unsigned short bmp_logo_palette[];\n"
67 "extern unsigned char bmp_logo_bitmap[];\n\n"
68 "#endif /* __BMP_LOGO_H__ */\n",
69 b->width, b->height, n_colors,
73 int main (int argc, char *argv[])
79 uint16_t data_offset, n_colors;
86 if (!strcmp(argv[1], "--gen-info"))
88 else if (!strcmp(argv[1], "--gen-data"))
95 fp = fopen(argv[2], "rb");
101 if (fgetc (fp) != 'B' || fgetc (fp) != 'M')
102 error ("Input file is not a bitmap", fp);
105 * read width and height of the image, and the number of colors used;
109 if (fread (&data_offset, sizeof (uint16_t), 1, fp) != 1)
110 error ("Couldn't read bitmap data offset", fp);
112 if (fread (&b->width, sizeof (uint16_t), 1, fp) != 1)
113 error ("Couldn't read bitmap width", fp);
115 if (fread (&b->height, sizeof (uint16_t), 1, fp) != 1)
116 error ("Couldn't read bitmap height", fp);
118 if (fread (&n_colors, sizeof (uint16_t), 1, fp) != 1)
119 error ("Couldn't read bitmap colors", fp);
125 data_offset = le_short(data_offset);
126 b->width = le_short(b->width);
127 b->height = le_short(b->height);
128 n_colors = le_short(n_colors);
130 /* assume we are working with an 8-bit file */
131 if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) {
132 /* reserve DEFAULT_CMAP_SIZE color map entries for default map */
133 n_colors = 256 - DEFAULT_CMAP_SIZE;
136 if (mode == MODE_GEN_INFO) {
137 gen_info(b, n_colors);
142 " * Automatically generated by \"tools/bmp_logo\"\n"
147 "#ifndef __BMP_LOGO_DATA_H__\n"
148 "#define __BMP_LOGO_DATA_H__\n\n");
150 /* allocate memory */
151 if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL)
152 error ("Error allocating memory for file", fp);
154 /* read and print the palette information */
155 printf("unsigned short bmp_logo_palette[] = {\n");
157 for (i=0; i<n_colors; ++i) {
158 b->palette[(int)(i*3+2)] = fgetc(fp);
159 b->palette[(int)(i*3+1)] = fgetc(fp);
160 b->palette[(int)(i*3+0)] = fgetc(fp);
163 printf ("%s0x0%X%X%X,%s",
164 ((i%8) == 0) ? "\t" : " ",
165 (b->palette[(int)(i*3+0)] >> 4) & 0x0F,
166 (b->palette[(int)(i*3+1)] >> 4) & 0x0F,
167 (b->palette[(int)(i*3+2)] >> 4) & 0x0F,
168 ((i%8) == 7) ? "\n" : ""
172 /* seek to offset indicated by file header */
173 fseek(fp, (long)data_offset, SEEK_SET);
175 /* read the bitmap; leave room for default color map */
179 printf("unsigned char bmp_logo_bitmap[] = {\n");
180 for (i=(b->height-1)*b->width; i>=0; i-=b->width) {
181 for (x = 0; x < b->width; x++) {
182 b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \
187 for (i=0; i<(b->height*b->width); ++i) {
192 ((i%8) == 7) ? '\n' : ' '
197 "#endif /* __BMP_LOGO_DATA_H__ */\n"