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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 "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/typography/otspec/vmtx.htm | |
13 | |
14 #define TABLE_NAME "vmtx" | |
15 | |
16 namespace ots { | |
17 | |
18 bool ots_vmtx_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { | |
19 Buffer table(data, length); | |
20 OpenTypeVMTX *vmtx = new OpenTypeVMTX; | |
21 file->vmtx = vmtx; | |
22 | |
23 if (!file->vhea || !file->maxp) { | |
24 return OTS_FAILURE_MSG("vhea or maxp table missing as needed by vmtx"); | |
25 } | |
26 | |
27 if (!ParseMetricsTable(file, &table, file->maxp->num_glyphs, | |
28 &file->vhea->header, &vmtx->metrics)) { | |
29 return OTS_FAILURE_MSG("Failed to parse vmtx metrics"); | |
30 } | |
31 | |
32 return true; | |
33 } | |
34 | |
35 bool ots_vmtx_should_serialise(OpenTypeFile *file) { | |
36 // vmtx should serialise when vhea and GSUB are preserved. | |
37 // See the comment in ots_vhea_should_serialise(). | |
38 return file->vmtx != NULL && file->vhea != NULL && | |
39 ots_gsub_should_serialise(file); | |
40 } | |
41 | |
42 bool ots_vmtx_serialise(OTSStream *out, OpenTypeFile *file) { | |
43 if (!SerialiseMetricsTable(file, out, &file->vmtx->metrics)) { | |
44 return OTS_FAILURE_MSG("Failed to write vmtx metrics"); | |
45 } | |
46 return true; | |
47 } | |
48 | |
49 void ots_vmtx_free(OpenTypeFile *file) { | |
50 delete file->vmtx; | |
51 } | |
52 | |
53 } // namespace ots | |
54 | |
55 #undef TABLE_NAME | |
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