parent
f6d29959a8
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0bbe2005ea
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#include <stdio.h> |
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#include <stdlib.h> |
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#if defined(__linux__) |
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#include <stdint.h> |
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#else |
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#ifdef __CYGWIN__ |
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#include "elf.h" |
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#else |
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#include <inttypes.h> |
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#endif |
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#endif |
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#ifdef __CYGWIN__ |
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typedef unsigned short ushort; |
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#endif /* __CYGWIN__ */ |
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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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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 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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fprintf (stderr, "%s is not a bitmap file.\n", argv[1]); |
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exit (EXIT_FAILURE); |
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} |
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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, 16); |
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fread (&b->width, sizeof (uint16_t), 1, fp); |
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skip_bytes (fp, 2); |
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fread (&b->height, sizeof (uint16_t), 1, fp); |
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skip_bytes (fp, 22); |
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fread (&n_colors, sizeof (uint16_t), 1, 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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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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fclose (fp); |
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printf ("Error allocating memory for file %s.\n", argv[1]); |
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exit (EXIT_FAILURE); |
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} |
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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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#if 0 |
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if ((i%4) == 0) |
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putchar ('\t'); |
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printf ("0x%02X, 0x%02X, 0x%02X,%s", |
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b->palette[(int)(i*3+0)], |
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b->palette[(int)(i*3+1)], |
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b->palette[(int)(i*3+2)], |
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((i%4) == 3) ? "\n" : " " |
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); |
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#else |
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if ((i%8) == 0) |
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putchar ('\t'); |
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printf ("0x0%X%X%X,%s", |
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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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#endif |
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} |
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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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