1// Copyright (c) 2011 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 "vmtx.h"
6
7#include "gsub.h"
8#include "maxp.h"
9#include "vhea.h"
10
11// vmtx - Vertical Metrics Table
12// http://www.microsoft.com/opentype/otspec/vmtx.htm
13
14namespace ots {
15
16bool ots_vmtx_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
17  Buffer table(data, length);
18  OpenTypeVMTX *vmtx = new OpenTypeVMTX;
19  file->vmtx = vmtx;
20
21  if (!file->vhea || !file->maxp) {
22    return OTS_FAILURE();
23  }
24
25  if (!ParseMetricsTable(&table, file->maxp->num_glyphs,
26                         &file->vhea->header, &vmtx->metrics)) {
27    return OTS_FAILURE();
28  }
29
30  return true;
31}
32
33bool ots_vmtx_should_serialise(OpenTypeFile *file) {
34  // vmtx should serialise when vhea and GSUB are preserved.
35  // See the comment in ots_vhea_should_serialise().
36  return file->vmtx != NULL && file->vhea != NULL &&
37      ots_gsub_should_serialise(file);
38}
39
40bool ots_vmtx_serialise(OTSStream *out, OpenTypeFile *file) {
41  if (!SerialiseMetricsTable(out, &file->vmtx->metrics)) {
42    return OTS_FAILURE();
43  }
44  return true;
45}
46
47void ots_vmtx_free(OpenTypeFile *file) {
48  delete file->vmtx;
49}
50
51}  // namespace ots
52
53