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 } 177