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/opentype/otspec/vhea.htm 13 14 namespace ots { 15 16 bool ots_vhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { 17 Buffer table(data, length); 18 OpenTypeVHEA *vhea = new OpenTypeVHEA; 19 file->vhea = vhea; 20 21 if (!table.ReadU32(&vhea->header.version)) { 22 return OTS_FAILURE(); 23 } 24 if (vhea->header.version != 0x00010000 && 25 vhea->header.version != 0x00011000) { 26 return OTS_FAILURE(); 27 } 28 29 if (!ParseMetricsHeader(file, &table, &vhea->header)) { 30 return OTS_FAILURE(); 31 } 32 33 return true; 34 } 35 36 bool ots_vhea_should_serialise(OpenTypeFile *file) { 37 // vhea should'nt serialise when vmtx doesn't exist. 38 // Firefox developer pointed out that vhea/vmtx should serialise iff GSUB is 39 // preserved. See http://crbug.com/77386 40 return file->vhea != NULL && file->vmtx != NULL && 41 ots_gsub_should_serialise(file); 42 } 43 44 bool ots_vhea_serialise(OTSStream *out, OpenTypeFile *file) { 45 if (!SerialiseMetricsHeader(out, &file->vhea->header)) { 46 return OTS_FAILURE(); 47 } 48 return true; 49 } 50 51 void ots_vhea_free(OpenTypeFile *file) { 52 delete file->vhea; 53 } 54 55 } // namespace ots 56 57
