1 files changed, 95 insertions, 0 deletions
diff --git a/misc/ttf2woff/genwoff.c b/misc/ttf2woff/genwoff.c
new file mode 100644
index 000000000..7b6b746a7
--- /dev/null
+++ b/misc/ttf2woff/genwoff.c
@@ -0,0 +1,95 @@
+/*
+ *	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 <assert.h>
+#include "ttf2woff.h"
+
+#define MIN_COMPR 16
+
+void gen_woff(struct buf *out, struct ttf *ttf)
+{
+	unsigned woff_size, sfnt_size;
+	struct buf meta_comp={0};
+	u32 meta_off, priv_off;
+	u8 *buf, *p;
+	int i;
+
+	woff_size = 44 + 20*ttf->ntables;
+	sfnt_size = 12 + 16*ttf->ntables;
+	for(i=0; i<ttf->ntables; i++) {
+		struct table *t = ttf->tab_pos[i];
+		t->pos = woff_size; // remember offset in output file
+		t->zbuf = t->buf;
+		if(t->buf.len >= MIN_COMPR)
+			zlib_compress(&t->zbuf, &t->buf);
+		sfnt_size += t->buf.len+3 & ~3;
+		woff_size += t->zbuf.len+3 & ~3;
+	}
+
+	meta_off = 0;
+	if(ttf->woff_meta.len >= MIN_COMPR) {
+		meta_comp = ttf->woff_meta;
+		zlib_compress(&meta_comp, &ttf->woff_meta);
+		meta_off = woff_size;
+		woff_size += meta_comp.len;
+	}
+
+	priv_off = 0;
+	if(ttf->woff_priv.len) {
+		priv_off = woff_size;
+		woff_size += ttf->woff_priv.len;
+	}
+
+	buf = my_alloc(woff_size);
+
+	p32(buf, 0x774F4646);
+	p32(buf+4, ttf->flavor);
+	p32(buf+8, woff_size);
+	p16(buf+12, ttf->ntables);
+	p16(buf+14, 0);
+	p32(buf+16, sfnt_size);
+	p32(buf+20, 0); // version ?
+	p32(buf+24, meta_off);
+	p32(buf+28, meta_comp.len); // meta len
+	p32(buf+32, ttf->woff_meta.len); // meta orig len
+	p32(buf+36, priv_off);
+	p32(buf+40, ttf->woff_priv.len);
+
+	p = buf + 44;
+	for(i=0; i<ttf->ntables; i++) {
+		struct table *t = &ttf->tables[i];
+		p32(p, t->tag);
+		p32(p+4, t->pos);
+		p32(p+8, t->zbuf.len);
+		p32(p+12, t->buf.len);
+		p32(p+16, t->csum);
+		p += 20;
+	}
+
+	for(i=0; i<ttf->ntables; i++) {
+		struct table *t = ttf->tab_pos[i];
+		u32 sz = t->zbuf.len;
+		p = append(p, t->zbuf.ptr, sz);
+		while(sz&3) *p++=0, sz++;
+//		if(t->zbuf.ptr != t->buf.ptr)
+//			my_free(t->zbuf.ptr);
+	}
+
+	if(meta_comp.len)
+		p = append(p, meta_comp.ptr, meta_comp.len);
+
+	if(ttf->woff_priv.len)
+		p = append(p, ttf->woff_priv.ptr, ttf->woff_priv.len);
+
+	assert(p == buf+woff_size);
+
+	out->ptr = buf;
+	out->len = woff_size;
+}