diff options
| -rw-r--r-- | tools/bmp_logo.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/tools/bmp_logo.c b/tools/bmp_logo.c new file mode 100644 index 0000000..54fdcff --- /dev/null +++ b/tools/bmp_logo.c @@ -0,0 +1,177 @@ +#include <stdio.h> +#include <stdlib.h> + +#if defined(__linux__) +#include <stdint.h> +#else +#ifdef __CYGWIN__ +#include "elf.h" +#else +#include <inttypes.h> +#endif +#endif + +#ifdef __CYGWIN__ +typedef unsigned short ushort; +#endif /* __CYGWIN__ */ + + +typedef struct bitmap_s { /* bitmap description */ + uint16_t width; + uint16_t height; + uint8_t palette[256*3]; + uint8_t *data; +} bitmap_t; + +#define DEFAULT_CMAP_SIZE 16 /* size of default color map */ + +/* + * Neutralize little endians. + */ +uint16_t le_short(uint16_t x) +{ + uint16_t val; + uint8_t *p = (uint8_t *)(&x); + + val = (*p++ & 0xff) << 0; + val |= (*p & 0xff) << 8; + + return val; +} + +void skip_bytes (FILE *fp, int n) +{ + while (n-- > 0) + fgetc (fp); +} + +int main (int argc, char *argv[]) +{ + int i, x; + FILE *fp; + bitmap_t bmp; + bitmap_t *b = &bmp; + uint16_t n_colors; + + if (argc < 2) { + fprintf (stderr, "Usage: %s file\n", argv[0]); + exit (EXIT_FAILURE); + } + + if ((fp = fopen (argv[1], "rb")) == NULL) { + perror (argv[1]); + exit (EXIT_FAILURE); + } + + if (fgetc (fp) != 'B' || fgetc (fp) != 'M') { + fprintf (stderr, "%s is not a bitmap file.\n", argv[1]); + exit (EXIT_FAILURE); + } + + /* + * read width and height of the image, and the number of colors used; + * ignore the rest + */ + skip_bytes (fp, 16); + fread (&b->width, sizeof (uint16_t), 1, fp); + skip_bytes (fp, 2); + fread (&b->height, sizeof (uint16_t), 1, fp); + skip_bytes (fp, 22); + fread (&n_colors, sizeof (uint16_t), 1, fp); + skip_bytes (fp, 6); + + /* + * Repair endianess. + */ + b->width = le_short(b->width); + b->height = le_short(b->height); + n_colors = le_short(n_colors); + + /* assume we are working with an 8-bit file */ + if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) { + /* reserve DEFAULT_CMAP_SIZE color map entries for default map */ + n_colors = 256 - DEFAULT_CMAP_SIZE; + } + + printf ("/*\n" + " * Automatically generated by \"tools/bmp_logo\"\n" + " *\n" + " * DO NOT EDIT\n" + " *\n" + " */\n\n\n" + "#ifndef __BMP_LOGO_H__\n" + "#define __BMP_LOGO_H__\n\n" + "#define BMP_LOGO_WIDTH\t\t%d\n" + "#define BMP_LOGO_HEIGHT\t\t%d\n" + "#define BMP_LOGO_COLORS\t\t%d\n" + "#define BMP_LOGO_OFFSET\t\t%d\n" + "\n", + b->width, b->height, n_colors, + DEFAULT_CMAP_SIZE); + + /* allocate memory */ + if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL) { + fclose (fp); + printf ("Error allocating memory for file %s.\n", argv[1]); + exit (EXIT_FAILURE); + } + + /* read and print the palette information */ + printf ("unsigned short bmp_logo_palette[] = {\n"); + + for (i=0; i<n_colors; ++i) { + b->palette[(int)(i*3+2)] = fgetc(fp); + b->palette[(int)(i*3+1)] = fgetc(fp); + b->palette[(int)(i*3+0)] = fgetc(fp); + x=fgetc(fp); + +#if 0 + if ((i%4) == 0) + putchar ('\t'); + printf ("0x%02X, 0x%02X, 0x%02X,%s", + b->palette[(int)(i*3+0)], + b->palette[(int)(i*3+1)], + b->palette[(int)(i*3+2)], + ((i%4) == 3) ? "\n" : " " + ); +#else + if ((i%8) == 0) + putchar ('\t'); + printf ("0x0%X%X%X,%s", + (b->palette[(int)(i*3+0)] >> 4) & 0x0F, + (b->palette[(int)(i*3+1)] >> 4) & 0x0F, + (b->palette[(int)(i*3+2)] >> 4) & 0x0F, + ((i%8) == 7) ? "\n" : " " + ); +#endif + } + + /* read the bitmap; leave room for default color map */ + printf ("\n"); + printf ("};\n"); + printf ("\n"); + printf ("unsigned char bmp_logo_bitmap[] = {\n"); + for (i=(b->height-1)*b->width; i>=0; i-=b->width) { + for (x = 0; x < b->width; x++) { + b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \ + + DEFAULT_CMAP_SIZE; + } + } + fclose (fp); + + for (i=0; i<(b->height*b->width); ++i) { + if ((i%8) == 0) + putchar ('\t'); + printf ("0x%02X,%c", + b->data[i], + ((i%8) == 7) ? '\n' : ' ' + ); + } + printf ("\n" + "};\n\n" + "#endif /* __BMP_LOGO_H__ */\n" + ); + + return (0); +} + |