mirror of
https://github.com/rsms/inter.git
synced 2024-12-27 01:27:17 +03:00
89 lines
1.7 KiB
C
89 lines
1.7 KiB
C
|
/*
|
||
|
* Copyright (C) 2013 Jan Bobrowski <jb@wizard.ae.krakow.pl>
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or
|
||
|
* modify it under the terms of the GNU General Public License
|
||
|
* version 2 as published by the Free Software Foundation.
|
||
|
*/
|
||
|
|
||
|
#include <string.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <zlib.h>
|
||
|
#include "ttf2woff.h"
|
||
|
|
||
|
static struct buf get_or_inflate(u8 *p, size_t len, size_t orig_len)
|
||
|
{
|
||
|
struct buf buf;
|
||
|
uLongf blen;
|
||
|
char *m;
|
||
|
int v;
|
||
|
|
||
|
if(len == orig_len) {
|
||
|
buf.ptr = p;
|
||
|
buf.len = len;
|
||
|
return buf;
|
||
|
}
|
||
|
|
||
|
buf.len = orig_len;
|
||
|
buf.ptr = my_alloc(orig_len);
|
||
|
|
||
|
blen = buf.len;
|
||
|
v = uncompress(buf.ptr, &blen, p, len);
|
||
|
switch(v) {
|
||
|
case Z_OK:
|
||
|
if(blen==buf.len)
|
||
|
return buf;
|
||
|
case Z_MEM_ERROR: m = "BAD_FONT uncompressed length"; break;
|
||
|
case Z_DATA_ERROR: m = "Data corrupted"; ; break;
|
||
|
default: m = "Error";
|
||
|
}
|
||
|
|
||
|
errx(3, "zlib: %s", m);
|
||
|
}
|
||
|
|
||
|
void read_woff(struct ttf *ttf, u8 *data, size_t length)
|
||
|
{
|
||
|
u8 *p;
|
||
|
int i;
|
||
|
|
||
|
if(length<=44+20) BAD_FONT;
|
||
|
|
||
|
ttf->flavor = g32(data+4);
|
||
|
|
||
|
if(g32(data+8) != length) BAD_FONT;
|
||
|
|
||
|
ttf->ntables = g16(data+12);
|
||
|
if(!ttf->ntables) BAD_FONT;
|
||
|
|
||
|
{
|
||
|
u32 len=g32(data+28), off;
|
||
|
ttf->woff_meta.len = 0;
|
||
|
if(len) {
|
||
|
off = g32(data+24);
|
||
|
if((off|len)>length || off+len>length)
|
||
|
BAD_FONT;
|
||
|
ttf->woff_meta = get_or_inflate(data+off, len, g32(data+32));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
ttf->woff_priv.len = g32(data+40);
|
||
|
ttf->woff_priv.ptr = ttf->woff_priv.len ? data+g32(data+36) : 0;
|
||
|
|
||
|
alloc_tables(ttf);
|
||
|
|
||
|
p = data+44;
|
||
|
for(i=0; i<ttf->ntables; i++) {
|
||
|
struct table *t = &ttf->tables[i];
|
||
|
u32 off=g32(p+4), len=g32(p+8);
|
||
|
if((off|len)>length || off+len>length)
|
||
|
BAD_FONT;
|
||
|
t->tag = g32(p);
|
||
|
t->csum = g32(p+16);
|
||
|
t->pos = off;
|
||
|
t->free_buf = 1;
|
||
|
t->buf = get_or_inflate(data+off, len, g32(p+12));
|
||
|
name_table(t);
|
||
|
p += 20;
|
||
|
}
|
||
|
}
|