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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 "vhea.h" | |
6 | |
7 #include "gsub.h" | |
8 #include "head.h" | |
9 #include "maxp.h" | |
10 | |
11 // vhea - Vertical Header Table | |
12 // http://www.microsoft.com/typography/otspec/vhea.htm | |
13 | |
14 #define TABLE_NAME "vhea" | |
15 | |
16 namespace ots { | |
17 | |
18 bool ots_vhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { | |
19 Buffer table(data, length); | |
20 OpenTypeVHEA *vhea = new OpenTypeVHEA; | |
21 file->vhea = vhea; | |
22 | |
23 if (!table.ReadU32(&vhea->header.version)) { | |
24 return OTS_FAILURE_MSG("Failed to read version"); | |
25 } | |
26 if (vhea->header.version != 0x00010000 && | |
27 vhea->header.version != 0x00011000) { | |
28 return OTS_FAILURE_MSG("Bad vhea version %x", vhea->header.version); | |
29 } | |
30 | |
31 if (!ParseMetricsHeader(file, &table, &vhea->header)) { | |
32 return OTS_FAILURE_MSG("Failed to parse metrics in vhea"); | |
33 } | |
34 | |
35 return true; | |
36 } | |
37 | |
38 bool ots_vhea_should_serialise(OpenTypeFile *file) { | |
39 // vhea should'nt serialise when vmtx doesn't exist. | |
40 // Firefox developer pointed out that vhea/vmtx should serialise iff GSUB is | |
41 // preserved. See http://crbug.com/77386 | |
42 return file->vhea != NULL && file->vmtx != NULL && | |
43 ots_gsub_should_serialise(file); | |
44 } | |
45 | |
46 bool ots_vhea_serialise(OTSStream *out, OpenTypeFile *file) { | |
47 if (!SerialiseMetricsHeader(file, out, &file->vhea->header)) { | |
48 return OTS_FAILURE_MSG("Failed to write vhea metrics"); | |
49 } | |
50 return true; | |
51 } | |
52 | |
53 void ots_vhea_free(OpenTypeFile *file) { | |
54 delete file->vhea; | |
55 } | |
56 | |
57 } // namespace ots | |
58 | |
59 #undef TABLE_NAME | |
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