michael@0: // Copyright (c) 2011 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #include "vmtx.h"
michael@0: 
michael@0: #include "gsub.h"
michael@0: #include "maxp.h"
michael@0: #include "vhea.h"
michael@0: 
michael@0: // vmtx - Vertical Metrics Table
michael@0: // http://www.microsoft.com/typography/otspec/vmtx.htm
michael@0: 
michael@0: #define TABLE_NAME "vmtx"
michael@0: 
michael@0: namespace ots {
michael@0: 
michael@0: bool ots_vmtx_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
michael@0:   Buffer table(data, length);
michael@0:   OpenTypeVMTX *vmtx = new OpenTypeVMTX;
michael@0:   file->vmtx = vmtx;
michael@0: 
michael@0:   if (!file->vhea || !file->maxp) {
michael@0:     return OTS_FAILURE_MSG("vhea or maxp table missing as needed by vmtx");
michael@0:   }
michael@0: 
michael@0:   if (!ParseMetricsTable(file, &table, file->maxp->num_glyphs,
michael@0:                          &file->vhea->header, &vmtx->metrics)) {
michael@0:     return OTS_FAILURE_MSG("Failed to parse vmtx metrics");
michael@0:   }
michael@0: 
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool ots_vmtx_should_serialise(OpenTypeFile *file) {
michael@0:   // vmtx should serialise when vhea and GSUB are preserved.
michael@0:   // See the comment in ots_vhea_should_serialise().
michael@0:   return file->vmtx != NULL && file->vhea != NULL &&
michael@0:       ots_gsub_should_serialise(file);
michael@0: }
michael@0: 
michael@0: bool ots_vmtx_serialise(OTSStream *out, OpenTypeFile *file) {
michael@0:   if (!SerialiseMetricsTable(file, out, &file->vmtx->metrics)) {
michael@0:     return OTS_FAILURE_MSG("Failed to write vmtx metrics");
michael@0:   }
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: void ots_vmtx_free(OpenTypeFile *file) {
michael@0:   delete file->vmtx;
michael@0: }
michael@0: 
michael@0: }  // namespace ots
michael@0: