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 #include <config.h>
  15
  16 typedef struct bitmap_s {               /* bitmap description */
  17         uint16_t width;
  18         uint16_t height;
  19         uint8_t palette[256*3];
  20         uint8_t *data;
  21 } bitmap_t;
  22
  23
  24
  25 #define DEFAULT_CMAP_SIZE       16      /* size of default color map    */
  26
  27 /*
  28  * Neutralize little endians.
  29  */
  30 uint16_t le_short(uint16_t x)
  31 {
  32     uint16_t val;
  33     uint8_t *p = (uint8_t *)(&x);
  34
  35     val =  (*p++ & 0xff) << 0;
  36     val |= (*p & 0xff) << 8;
  37
  38     return val;
  39 }
  40
  41 uint32_t le_int(uint32_t x)
  42 {
  43     uint32_t val;
  44     uint8_t *p = (uint8_t *)(&x);
  45
  46     val =  (*p++ & 0xff) << 0;
  47     val =  (*p++ & 0xff) << 8;
  48     val =  (*p++ & 0xff) << 16;
  49     val |= (*p & 0xff) << 24;
  50
  51     return val;
  52 }
  53
  54 void skip_bytes (FILE *fp, int n)
  55 {
  56         while (n-- > 0)
  57                 fgetc (fp);
  58 }
  59
  60 int main (int argc, char *argv[])
  61 {
  62         int     i, x;
  63         FILE    *fp;
  64         bitmap_t bmp;
  65         bitmap_t *b = &bmp;
  66         uint16_t data_offset, n_colors;
  67 #if defined(CONFIG_LCD)
  68 #if LCD_BPP==4
  69         short val;
  70 #elif LCD_BPP==5
  71         int val;
  72 #endif
  73 #endif
  74
  75         if (argc < 2) {
  76                 fprintf (stderr, "Usage: %s file\n", argv[0]);
  77                 exit (EXIT_FAILURE);
  78         }
  79
  80         if ((fp = fopen (argv[1], "rb")) == NULL) {
  81                 perror (argv[1]);
  82                 exit (EXIT_FAILURE);
  83         }
  84
  85         if (fgetc (fp) != 'B' || fgetc (fp) != 'M') {
  86                 fprintf (stderr, "%s is not a bitmap file.\n", argv[1]);
  87                 exit (EXIT_FAILURE);
  88         }
  89
  90         /*
  91          * read width and height of the image, and the number of colors used;
  92          * ignore the rest
  93          */
  94         skip_bytes (fp, 8);
  95         fread (&data_offset, sizeof (uint16_t), 1, fp);
  96         skip_bytes (fp, 6);
  97         fread (&b->width,   sizeof (uint16_t), 1, fp);
  98         skip_bytes (fp, 2);
  99         fread (&b->height,  sizeof (uint16_t), 1, fp);
 100         skip_bytes (fp, 22);
 101         fread (&n_colors, sizeof (uint16_t), 1, fp);
 102         skip_bytes (fp, 6);
 103
 104         /*
 105          * Repair endianess.
 106          */
 107         data_offset = le_short(data_offset);
 108         b->width = le_short(b->width);
 109         b->height = le_short(b->height);
 110         n_colors = le_short(n_colors);
 111
 112         /* assume we are working with an 8-bit file */
 113 #if defined(CONFIG_LCD)
 114         if ( n_colors > 256 ) {
 115                 n_colors = 256 ;
 116         }
 117 #else
 118         if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) {
 119                 /* reserve DEFAULT_CMAP_SIZE color map entries for default map */
 120                 n_colors = 256 - DEFAULT_CMAP_SIZE;
 121         }
 122 #endif
 123
 124         printf ("/*\n"
 125                 " * Automatically generated by \"tools/bmp_logo\"\n"
 126                 " *\n"
 127                 " * DO NOT EDIT\n"
 128                 " *\n"
 129                 " */\n\n\n"
 130                 "#ifndef __BMP_LOGO_H__\n"
 131                 "#define __BMP_LOGO_H__\n\n"
 132                 "#define BMP_LOGO_WIDTH\t\t%d\n"
 133                 "#define BMP_LOGO_HEIGHT\t\t%d\n"
 134                 "#define BMP_LOGO_COLORS\t\t%d\n"
 135                 "#define BMP_LOGO_OFFSET\t\t%d\n"
 136                 "\n",
 137                 b->width, b->height, n_colors,
 138                 DEFAULT_CMAP_SIZE);
 139
 140         /* allocate memory */
 141         if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL) {
 142                 fclose (fp);
 143                 printf ("Error allocating memory for file %s.\n", argv[1]);
 144                 exit (EXIT_FAILURE);
 145         }
 146
 147         /* read and print the palette information */
 148         printf ("unsigned int bmp_logo_palette[] = {\n");
 149
 150         for (i=0; i<n_colors; ++i) {
 151                 b->palette[(int)(i*3+2)] = fgetc(fp);
 152                 b->palette[(int)(i*3+1)] = fgetc(fp);
 153                 b->palette[(int)(i*3+0)] = fgetc(fp);
 154                 x=fgetc(fp);
 155
 156 #if defined(CONFIG_LCD)
 157                 val = 0;
 158
 159 #if LCD_BPP==4
 160                 /* RGB565(16bits) */
 161                 val =   ((b->palette[(int)(i*3+0)] >> 3) & 0x1F )<< 11 | \
 162                         ((b->palette[(int)(i*3+1)] >> 2) & 0x3F )<< 5  | \
 163                         ((b->palette[(int)(i*3+2)] >> 3) & 0x1F );
 164 #elif LCD_BPP==5
 165                 /* RGB666(18bits) */
 166                 val =   b->palette[(int)(i*3+0)] << 16 | \
 167                         b->palette[(int)(i*3+1)] << 8  | \
 168                         b->palette[(int)(i*3+2)] << 0 ;
 169 #endif
 170                 printf ("%s0x%X,%s",
 171                         ((i%8) == 0) ? "\t" : "  ",
 172                         val,
 173                         ((i%8) == 7) ? "\n" : ""
 174                 );
 175
 176 #else
 177                 printf ("%s0x0%X%X%X,%s",
 178                         ((i%8) == 0) ? "\t" : "  ",
 179                         (b->palette[(int)(i*3+0)] >> 4) & 0x0F,
 180                         (b->palette[(int)(i*3+1)] >> 4) & 0x0F,
 181                         (b->palette[(int)(i*3+2)] >> 4) & 0x0F,
 182                         ((i%8) == 7) ? "\n" : ""
 183                 );
 184 #endif
 185         }
 186
 187         /* seek to offset indicated by file header */
 188         fseek(fp, (long)data_offset, SEEK_SET);
 189
 190         /* read the bitmap; leave room for default color map */
 191         printf ("\n");
 192         printf ("};\n");
 193         printf ("\n");
 194         printf ("unsigned char bmp_logo_bitmap[] = {\n");
 195         for (i=(b->height-1)*b->width; i>=0; i-=b->width) {
 196                 for (x = 0; x < b->width; x++) {
 197 #if defined(CONFIG_LCD)
 198                         b->data[ i + x] = (uint8_t) fgetc (fp) ;
 199 #else
 200                         b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \
 201                                                 + DEFAULT_CMAP_SIZE;
 202 #endif
 203                 }
 204         }
 205         fclose (fp);
 206
 207         for (i=0; i<(b->height*b->width); ++i) {
 208                 if ((i%8) == 0)
 209                         putchar ('\t');
 210                 printf ("0x%02X,%c",
 211                         b->data[i],
 212                         ((i%8) == 7) ? '\n' : ' '
 213                 );
 214         }
 215         printf ("\n"
 216                 "};\n\n"
 217                 "#endif /* __BMP_LOGO_H__ */\n"
 218         );
 219
 220         return (0);
 221 }