gfx/ots/src/vhea.cc@6474c204b198 (annotated)
gfx/ots/src/vhea.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "vhea.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include "gsub.h" |
| michael@0 | 8 | #include "head.h" |
| michael@0 | 9 | #include "maxp.h" |
| michael@0 | 10 | |
| michael@0 | 11 | // vhea - Vertical Header Table |
| michael@0 | 12 | // http://www.microsoft.com/typography/otspec/vhea.htm |
| michael@0 | 13 | |
| michael@0 | 14 | #define TABLE_NAME "vhea" |
| michael@0 | 15 | |
| michael@0 | 16 | namespace ots { |
| michael@0 | 17 | |
| michael@0 | 18 | bool ots_vhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { |
| michael@0 | 19 | Buffer table(data, length); |
| michael@0 | 20 | OpenTypeVHEA *vhea = new OpenTypeVHEA; |
| michael@0 | 21 | file->vhea = vhea; |
| michael@0 | 22 | |
| michael@0 | 23 | if (!table.ReadU32(&vhea->header.version)) { |
| michael@0 | 24 | return OTS_FAILURE_MSG("Failed to read version"); |
| michael@0 | 25 | } |
| michael@0 | 26 | if (vhea->header.version != 0x00010000 && |
| michael@0 | 27 | vhea->header.version != 0x00011000) { |
| michael@0 | 28 | return OTS_FAILURE_MSG("Bad vhea version %x", vhea->header.version); |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | if (!ParseMetricsHeader(file, &table, &vhea->header)) { |
| michael@0 | 32 | return OTS_FAILURE_MSG("Failed to parse metrics in vhea"); |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | return true; |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | bool ots_vhea_should_serialise(OpenTypeFile *file) { |
| michael@0 | 39 | // vhea should'nt serialise when vmtx doesn't exist. |
| michael@0 | 40 | // Firefox developer pointed out that vhea/vmtx should serialise iff GSUB is |
| michael@0 | 41 | // preserved. See http://crbug.com/77386 |
| michael@0 | 42 | return file->vhea != NULL && file->vmtx != NULL && |
| michael@0 | 43 | ots_gsub_should_serialise(file); |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | bool ots_vhea_serialise(OTSStream *out, OpenTypeFile *file) { |
| michael@0 | 47 | if (!SerialiseMetricsHeader(file, out, &file->vhea->header)) { |
| michael@0 | 48 | return OTS_FAILURE_MSG("Failed to write vhea metrics"); |
| michael@0 | 49 | } |
| michael@0 | 50 | return true; |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | void ots_vhea_free(OpenTypeFile *file) { |
| michael@0 | 54 | delete file->vhea; |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | } // namespace ots |
| michael@0 | 58 |
