1 : // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #include "prep.h"
6 :
7 : // prep - Control Value Program
8 : // http://www.microsoft.com/opentype/otspec/prep.htm
9 :
10 : namespace ots {
11 :
12 0 : bool ots_prep_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
13 0 : Buffer table(data, length);
14 :
15 0 : OpenTypePREP *prep = new OpenTypePREP;
16 0 : file->prep = prep;
17 :
18 0 : if (length >= 128 * 1024u) {
19 0 : return OTS_FAILURE(); // almost all prep tables are less than 9k bytes.
20 : }
21 :
22 0 : if (!table.Skip(length)) {
23 0 : return OTS_FAILURE();
24 : }
25 :
26 0 : prep->data = data;
27 0 : prep->length = length;
28 0 : return true;
29 : }
30 :
31 0 : bool ots_prep_should_serialise(OpenTypeFile *file) {
32 0 : if (!file->glyf) return false; // this table is not for CFF fonts.
33 0 : return g_transcode_hints && file->prep;
34 : }
35 :
36 0 : bool ots_prep_serialise(OTSStream *out, OpenTypeFile *file) {
37 0 : const OpenTypePREP *prep = file->prep;
38 :
39 0 : if (!out->Write(prep->data, prep->length)) {
40 0 : return OTS_FAILURE();
41 : }
42 :
43 0 : return true;
44 : }
45 :
46 0 : void ots_prep_free(OpenTypeFile *file) {
47 0 : delete file->prep;
48 0 : }
49 :
50 : } // namespace ots
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