Initial revision
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);
+}
+