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