prep.cc (1064B)
1 // Copyright (c) 2009-2017 The OTS 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 "prep.h" 6 7 // prep - Control Value Program 8 // http://www.microsoft.com/typography/otspec/prep.htm 9 10 namespace ots { 11 12 bool OpenTypePREP::Parse(const uint8_t *data, size_t length) { 13 Buffer table(data, length); 14 15 if (length >= 128 * 1024u) { 16 // almost all prep tables are less than 9k bytes. 17 return Error("Table length %ld > 120K", length); 18 } 19 20 if (!table.Skip(length)) { 21 return Error("Failed to read table of length %ld", length); 22 } 23 24 this->m_data = data; 25 this->m_length = length; 26 return true; 27 } 28 29 bool OpenTypePREP::Serialize(OTSStream *out) { 30 if (!out->Write(this->m_data, this->m_length)) { 31 return Error("Failed to write table length"); 32 } 33 34 return true; 35 } 36 37 bool OpenTypePREP::ShouldSerialize() { 38 return Table::ShouldSerialize() && 39 // this table is not for CFF fonts. 40 GetFont()->GetTable(OTS_TAG_GLYF) != NULL; 41 } 42 43 } // namespace ots