zodttd / genesis4iphone

Click here to lend your support to: genesis4iphone and make a donation at www.pledgie.com !

A Sega Genesis (MegaDrive) and Sega CD emulator for the Apple iPhone and iPod Touch. Based on Notaz PicoDrive.

This URL has Read+Write access

genesis4iphone / tools / mkbgxx.c
100644 44 lines (33 sloc) 0.906 kb
raw blame history 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

#include <stdio.h>
#include <zlib.h>
 
static unsigned char buff[0x10140];
static unsigned char buff2[0x10140];
 
static void do_file(const char *ifn, const char *ofn)
{
	FILE *fi, *fo;
	int ret;
	unsigned long dlen = sizeof(buff2);
 
	fi = fopen(ifn, "rb");
	if (!fi) return;
	fseek(fi, 0x10020, SEEK_SET);
	fread(buff, 1, 0x10000, fi);
	fseek(fi, 0x2000, SEEK_CUR);
	fread(buff + 0x10000, 1, 0x80*2, fi);
	fseek(fi, 0x221a0, SEEK_SET);
	fread(buff + 0x10100, 1, 0x40, fi);
	fclose(fi);
 
	ret = compress2(buff2, &dlen, buff, sizeof(buff), Z_BEST_COMPRESSION);
	if (ret) { printf("compress2 failed with %i\n", ret); return; }
 
	fo = fopen(ofn, "wb");
	if (!fo) return;
	fwrite(buff2, 1, dlen, fo);
	fclose(fo);
 
	printf("%s: %6i -> %6li\n", ofn, sizeof(buff), dlen);
}
 
int main(int argc, char *argv[])
{
	if (argc != 3) return 1;
 
	do_file(argv[1], "bg40.bin");
	do_file(argv[2], "bg32.bin");
 
	return 0;
}