mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-16 23:18:51 +09:00
![Jon Smith](/assets/img/avatar_default.png)
All BMP files were being treated as though they had a 40 byte header. There are several BMP header formats consisting of additional data. This was causing some of the header to be read as color information, skewing the color palette. Signed-off-by: Jon Smith <jtsmith@pdiarm.com>
209 lines
4.6 KiB
C
209 lines
4.6 KiB
C
#include "compiler.h"
|
|
|
|
enum {
|
|
MODE_GEN_INFO,
|
|
MODE_GEN_DATA
|
|
};
|
|
|
|
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 */
|
|
|
|
void usage(const char *prog)
|
|
{
|
|
fprintf(stderr, "Usage: %s [--gen-info|--gen-data] file\n", prog);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
__attribute__ ((__noreturn__))
|
|
int error (char * msg, FILE *fp)
|
|
{
|
|
fprintf (stderr, "ERROR: %s\n", msg);
|
|
|
|
fclose (fp);
|
|
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
void gen_info(bitmap_t *b, uint16_t n_colors)
|
|
{
|
|
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"
|
|
"extern unsigned short bmp_logo_palette[];\n"
|
|
"extern unsigned char bmp_logo_bitmap[];\n\n"
|
|
"#endif /* __BMP_LOGO_H__ */\n",
|
|
b->width, b->height, n_colors,
|
|
DEFAULT_CMAP_SIZE);
|
|
}
|
|
|
|
int main (int argc, char *argv[])
|
|
{
|
|
int mode, i, x;
|
|
FILE *fp;
|
|
bitmap_t bmp;
|
|
bitmap_t *b = &bmp;
|
|
uint16_t data_offset, n_colors, hdr_size;
|
|
|
|
if (argc < 3) {
|
|
usage(argv[0]);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
if (!strcmp(argv[1], "--gen-info"))
|
|
mode = MODE_GEN_INFO;
|
|
else if (!strcmp(argv[1], "--gen-data"))
|
|
mode = MODE_GEN_DATA;
|
|
else {
|
|
usage(argv[0]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
fp = fopen(argv[2], "rb");
|
|
if (!fp) {
|
|
perror(argv[2]);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
if (fgetc (fp) != 'B' || fgetc (fp) != 'M')
|
|
error ("Input file is not a bitmap", fp);
|
|
|
|
/*
|
|
* read width and height of the image, and the number of colors used;
|
|
* ignore the rest
|
|
*/
|
|
skip_bytes (fp, 8);
|
|
if (fread (&data_offset, sizeof (uint16_t), 1, fp) != 1)
|
|
error ("Couldn't read bitmap data offset", fp);
|
|
skip_bytes(fp, 2);
|
|
if (fread(&hdr_size, sizeof(uint16_t), 1, fp) != 1)
|
|
error("Couldn't read bitmap header size", fp);
|
|
if (hdr_size < 40)
|
|
error("Invalid bitmap header", fp);
|
|
skip_bytes(fp, 2);
|
|
if (fread (&b->width, sizeof (uint16_t), 1, fp) != 1)
|
|
error ("Couldn't read bitmap width", fp);
|
|
skip_bytes (fp, 2);
|
|
if (fread (&b->height, sizeof (uint16_t), 1, fp) != 1)
|
|
error ("Couldn't read bitmap height", fp);
|
|
skip_bytes (fp, 22);
|
|
if (fread (&n_colors, sizeof (uint16_t), 1, fp) != 1)
|
|
error ("Couldn't read bitmap colors", fp);
|
|
skip_bytes(fp, hdr_size - 34);
|
|
|
|
/*
|
|
* Repair endianess.
|
|
*/
|
|
data_offset = le_short(data_offset);
|
|
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;
|
|
}
|
|
|
|
if (mode == MODE_GEN_INFO) {
|
|
gen_info(b, n_colors);
|
|
goto out;
|
|
}
|
|
|
|
printf("/*\n"
|
|
" * Automatically generated by \"tools/bmp_logo\"\n"
|
|
" *\n"
|
|
" * DO NOT EDIT\n"
|
|
" *\n"
|
|
" */\n\n\n"
|
|
"#ifndef __BMP_LOGO_DATA_H__\n"
|
|
"#define __BMP_LOGO_DATA_H__\n\n");
|
|
|
|
/* allocate memory */
|
|
if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL)
|
|
error ("Error allocating memory for file", fp);
|
|
|
|
/* 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);
|
|
|
|
printf ("%s0x0%X%X%X,%s",
|
|
((i%8) == 0) ? "\t" : " ",
|
|
(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" : ""
|
|
);
|
|
}
|
|
|
|
/* seek to offset indicated by file header */
|
|
fseek(fp, (long)data_offset, SEEK_SET);
|
|
|
|
/* 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[i + x] = (uint8_t) fgetc(fp)
|
|
+ DEFAULT_CMAP_SIZE;
|
|
}
|
|
}
|
|
|
|
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_DATA_H__ */\n"
|
|
);
|
|
|
|
out:
|
|
fclose(fp);
|
|
return 0;
|
|
}
|