gfx/ots/src/cvt.cc@6474c204b198 (annotated)
gfx/ots/src/cvt.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) 2009 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 "cvt.h" |
| michael@0 | 6 | |
| michael@0 | 7 | // cvt - Control Value Table |
| michael@0 | 8 | // http://www.microsoft.com/typography/otspec/cvt.htm |
| michael@0 | 9 | |
| michael@0 | 10 | #define TABLE_NAME "cvt" |
| michael@0 | 11 | |
| michael@0 | 12 | namespace ots { |
| michael@0 | 13 | |
| michael@0 | 14 | bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { |
| michael@0 | 15 | Buffer table(data, length); |
| michael@0 | 16 | |
| michael@0 | 17 | OpenTypeCVT *cvt = new OpenTypeCVT; |
| michael@0 | 18 | file->cvt = cvt; |
| michael@0 | 19 | |
| michael@0 | 20 | if (length >= 128 * 1024u) { |
| michael@0 | 21 | return OTS_FAILURE_MSG("Length (%d) > 120K"); // almost all cvt tables are less than 4k bytes. |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | if (length % 2 != 0) { |
| michael@0 | 25 | return OTS_FAILURE_MSG("Uneven cvt length (%d)", length); |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | if (!table.Skip(length)) { |
| michael@0 | 29 | return OTS_FAILURE_MSG("Length too high"); |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | cvt->data = data; |
| michael@0 | 33 | cvt->length = length; |
| michael@0 | 34 | return true; |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | bool ots_cvt_should_serialise(OpenTypeFile *file) { |
| michael@0 | 38 | if (!file->glyf) { |
| michael@0 | 39 | return false; // this table is not for CFF fonts. |
| michael@0 | 40 | } |
| michael@0 | 41 | return g_transcode_hints && file->cvt; |
| michael@0 | 42 | } |
| michael@0 | 43 | |
| michael@0 | 44 | bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) { |
| michael@0 | 45 | const OpenTypeCVT *cvt = file->cvt; |
| michael@0 | 46 | |
| michael@0 | 47 | if (!out->Write(cvt->data, cvt->length)) { |
| michael@0 | 48 | return OTS_FAILURE_MSG("Failed to write CVT table"); |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | return true; |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | void ots_cvt_free(OpenTypeFile *file) { |
| michael@0 | 55 | delete file->cvt; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | } // namespace ots |
