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3756609076
Shove a lot of the HOSTCC and related #ifdef checking crap into the new compiler.h header so that we can keep all other headers nice and clean. Also introduce custom uswap functions so we don't have to rely on the non standard implementations that a host may (or may not in the case of OS X) provide. This allows mkimage to finally build cleanly on an OS X system. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
#include "compiler.h"
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typedef struct bitmap_s { /* bitmap description */
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uint16_t width;
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uint16_t height;
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uint8_t palette[256*3];
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uint8_t *data;
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} bitmap_t;
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#define DEFAULT_CMAP_SIZE 16 /* size of default color map */
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/*
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* Neutralize little endians.
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*/
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uint16_t le_short(uint16_t x)
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{
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uint16_t val;
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uint8_t *p = (uint8_t *)(&x);
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val = (*p++ & 0xff) << 0;
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val |= (*p & 0xff) << 8;
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return val;
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}
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void skip_bytes (FILE *fp, int n)
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{
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while (n-- > 0)
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fgetc (fp);
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}
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__attribute__ ((__noreturn__))
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int error (char * msg, FILE *fp)
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{
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fprintf (stderr, "ERROR: %s\n", msg);
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fclose (fp);
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exit (EXIT_FAILURE);
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}
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int main (int argc, char *argv[])
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{
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int i, x;
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FILE *fp;
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bitmap_t bmp;
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bitmap_t *b = &bmp;
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uint16_t data_offset, n_colors;
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if (argc < 2) {
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fprintf (stderr, "Usage: %s file\n", argv[0]);
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exit (EXIT_FAILURE);
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}
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if ((fp = fopen (argv[1], "rb")) == NULL) {
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perror (argv[1]);
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exit (EXIT_FAILURE);
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}
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if (fgetc (fp) != 'B' || fgetc (fp) != 'M')
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error ("Input file is not a bitmap", fp);
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/*
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* read width and height of the image, and the number of colors used;
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* ignore the rest
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*/
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skip_bytes (fp, 8);
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if (fread (&data_offset, sizeof (uint16_t), 1, fp) != 1)
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error ("Couldn't read bitmap data offset", fp);
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skip_bytes (fp, 6);
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if (fread (&b->width, sizeof (uint16_t), 1, fp) != 1)
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error ("Couldn't read bitmap width", fp);
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skip_bytes (fp, 2);
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if (fread (&b->height, sizeof (uint16_t), 1, fp) != 1)
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error ("Couldn't read bitmap height", fp);
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skip_bytes (fp, 22);
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if (fread (&n_colors, sizeof (uint16_t), 1, fp) != 1)
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error ("Couldn't read bitmap colors", fp);
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skip_bytes (fp, 6);
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/*
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* Repair endianess.
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*/
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data_offset = le_short(data_offset);
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b->width = le_short(b->width);
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b->height = le_short(b->height);
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n_colors = le_short(n_colors);
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/* assume we are working with an 8-bit file */
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if ((n_colors == 0) || (n_colors > 256 - DEFAULT_CMAP_SIZE)) {
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/* reserve DEFAULT_CMAP_SIZE color map entries for default map */
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n_colors = 256 - DEFAULT_CMAP_SIZE;
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}
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printf ("/*\n"
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" * Automatically generated by \"tools/bmp_logo\"\n"
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" *\n"
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" * DO NOT EDIT\n"
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" *\n"
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" */\n\n\n"
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"#ifndef __BMP_LOGO_H__\n"
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"#define __BMP_LOGO_H__\n\n"
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"#define BMP_LOGO_WIDTH\t\t%d\n"
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"#define BMP_LOGO_HEIGHT\t\t%d\n"
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"#define BMP_LOGO_COLORS\t\t%d\n"
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"#define BMP_LOGO_OFFSET\t\t%d\n"
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"\n",
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b->width, b->height, n_colors,
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DEFAULT_CMAP_SIZE);
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/* allocate memory */
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if ((b->data = (uint8_t *)malloc(b->width * b->height)) == NULL)
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error ("Error allocating memory for file", fp);
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/* read and print the palette information */
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printf ("unsigned short bmp_logo_palette[] = {\n");
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for (i=0; i<n_colors; ++i) {
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b->palette[(int)(i*3+2)] = fgetc(fp);
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b->palette[(int)(i*3+1)] = fgetc(fp);
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b->palette[(int)(i*3+0)] = fgetc(fp);
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x=fgetc(fp);
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printf ("%s0x0%X%X%X,%s",
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((i%8) == 0) ? "\t" : " ",
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(b->palette[(int)(i*3+0)] >> 4) & 0x0F,
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(b->palette[(int)(i*3+1)] >> 4) & 0x0F,
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(b->palette[(int)(i*3+2)] >> 4) & 0x0F,
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((i%8) == 7) ? "\n" : ""
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);
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}
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/* seek to offset indicated by file header */
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fseek(fp, (long)data_offset, SEEK_SET);
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/* read the bitmap; leave room for default color map */
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printf ("\n");
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printf ("};\n");
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printf ("\n");
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printf ("unsigned char bmp_logo_bitmap[] = {\n");
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for (i=(b->height-1)*b->width; i>=0; i-=b->width) {
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for (x = 0; x < b->width; x++) {
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b->data[(uint16_t) i + x] = (uint8_t) fgetc (fp) \
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+ DEFAULT_CMAP_SIZE;
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}
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}
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fclose (fp);
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for (i=0; i<(b->height*b->width); ++i) {
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if ((i%8) == 0)
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putchar ('\t');
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printf ("0x%02X,%c",
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b->data[i],
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((i%8) == 7) ? '\n' : ' '
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);
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}
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printf ("\n"
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"};\n\n"
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"#endif /* __BMP_LOGO_H__ */\n"
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);
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return (0);
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}
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