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      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 "vmtx.h"
      6 
      7 #include "gsub.h"
      8 #include "maxp.h"
      9 #include "vhea.h"
     10 
     11 // vmtx - Vertical Metrics Table
     12 // http://www.microsoft.com/opentype/otspec/vmtx.htm
     13 
     14 namespace ots {
     15 
     16 bool ots_vmtx_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
     17   Buffer table(data, length);
     18   OpenTypeVMTX *vmtx = new OpenTypeVMTX;
     19   file->vmtx = vmtx;
     20 
     21   if (!file->vhea || !file->maxp) {
     22     return OTS_FAILURE();
     23   }
     24 
     25   if (!ParseMetricsTable(&table, file->maxp->num_glyphs,
     26                          &file->vhea->header, &vmtx->metrics)) {
     27     return OTS_FAILURE();
     28   }
     29 
     30   return true;
     31 }
     32 
     33 bool ots_vmtx_should_serialise(OpenTypeFile *file) {
     34   // vmtx should serialise when vhea and GSUB are preserved.
     35   // See the comment in ots_vhea_should_serialise().
     36   return file->vmtx != NULL && file->vhea != NULL &&
     37       ots_gsub_should_serialise(file);
     38 }
     39 
     40 bool ots_vmtx_serialise(OTSStream *out, OpenTypeFile *file) {
     41   if (!SerialiseMetricsTable(out, &file->vmtx->metrics)) {
     42     return OTS_FAILURE();
     43   }
     44   return true;
     45 }
     46 
     47 void ots_vmtx_free(OpenTypeFile *file) {
     48   delete file->vmtx;
     49 }
     50 
     51 }  // namespace ots
     52 
     53