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 | +} |