1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ots/src/vhea.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,58 @@
1.4 +// Copyright (c) 2011 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#include "vhea.h"
1.9 +
1.10 +#include "gsub.h"
1.11 +#include "head.h"
1.12 +#include "maxp.h"
1.13 +
1.14 +// vhea - Vertical Header Table
1.15 +// http://www.microsoft.com/typography/otspec/vhea.htm
1.16 +
1.17 +#define TABLE_NAME "vhea"
1.18 +
1.19 +namespace ots {
1.20 +
1.21 +bool ots_vhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
1.22 + Buffer table(data, length);
1.23 + OpenTypeVHEA *vhea = new OpenTypeVHEA;
1.24 + file->vhea = vhea;
1.25 +
1.26 + if (!table.ReadU32(&vhea->header.version)) {
1.27 + return OTS_FAILURE_MSG("Failed to read version");
1.28 + }
1.29 + if (vhea->header.version != 0x00010000 &&
1.30 + vhea->header.version != 0x00011000) {
1.31 + return OTS_FAILURE_MSG("Bad vhea version %x", vhea->header.version);
1.32 + }
1.33 +
1.34 + if (!ParseMetricsHeader(file, &table, &vhea->header)) {
1.35 + return OTS_FAILURE_MSG("Failed to parse metrics in vhea");
1.36 + }
1.37 +
1.38 + return true;
1.39 +}
1.40 +
1.41 +bool ots_vhea_should_serialise(OpenTypeFile *file) {
1.42 + // vhea should'nt serialise when vmtx doesn't exist.
1.43 + // Firefox developer pointed out that vhea/vmtx should serialise iff GSUB is
1.44 + // preserved. See http://crbug.com/77386
1.45 + return file->vhea != NULL && file->vmtx != NULL &&
1.46 + ots_gsub_should_serialise(file);
1.47 +}
1.48 +
1.49 +bool ots_vhea_serialise(OTSStream *out, OpenTypeFile *file) {
1.50 + if (!SerialiseMetricsHeader(file, out, &file->vhea->header)) {
1.51 + return OTS_FAILURE_MSG("Failed to write vhea metrics");
1.52 + }
1.53 + return true;
1.54 +}
1.55 +
1.56 +void ots_vhea_free(OpenTypeFile *file) {
1.57 + delete file->vhea;
1.58 +}
1.59 +
1.60 +} // namespace ots
1.61 +
