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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "vorg.h"
#include <vector>
// VORG - Vertical Origin Table
// http://www.microsoft.com/opentype/otspec/vorg.htm
#define DROP_THIS_TABLE \
do { delete file->vorg; file->vorg = 0; } while (0)
namespace ots {
bool ots_vorg_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
Buffer table(data, length);
file->vorg = new OpenTypeVORG;
OpenTypeVORG * const vorg = file->vorg;
uint16_t num_recs;
if (!table.ReadU16(&vorg->major_version) ||
!table.ReadU16(&vorg->minor_version) ||
!table.ReadS16(&vorg->default_vert_origin_y) ||
!table.ReadU16(&num_recs)) {
return OTS_FAILURE();
}
if (vorg->major_version != 1) {
OTS_WARNING("bad major version: %u", vorg->major_version);
DROP_THIS_TABLE;
return true;
}
if (vorg->minor_version != 0) {
OTS_WARNING("bad minor version: %u", vorg->minor_version);
DROP_THIS_TABLE;
return true;
}
// num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf).
if (!num_recs) {
return true;
}
uint16_t last_glyph_index = 0;
vorg->metrics.reserve(num_recs);
for (unsigned i = 0; i < num_recs; ++i) {
OpenTypeVORGMetrics rec;
if (!table.ReadU16(&rec.glyph_index) ||
!table.ReadS16(&rec.vert_origin_y)) {
return OTS_FAILURE();
}
if ((i != 0) && (rec.glyph_index <= last_glyph_index)) {
OTS_WARNING("the table is not sorted");
DROP_THIS_TABLE;
return true;
}
last_glyph_index = rec.glyph_index;
vorg->metrics.push_back(rec);
}
return true;
}
bool ots_vorg_should_serialise(OpenTypeFile *file) {
if (!file->cff) return false; // this table is not for fonts with TT glyphs.
return file->vorg;
}
bool ots_vorg_serialise(OTSStream *out, OpenTypeFile *file) {
OpenTypeVORG * const vorg = file->vorg;
if (!out->WriteU16(vorg->major_version) ||
!out->WriteU16(vorg->minor_version) ||
!out->WriteS16(vorg->default_vert_origin_y) ||
!out->WriteU16(vorg->metrics.size())) {
return OTS_FAILURE();
}
for (unsigned i = 0; i < vorg->metrics.size(); ++i) {
const OpenTypeVORGMetrics& rec = vorg->metrics[i];
if (!out->WriteU16(rec.glyph_index) ||
!out->WriteS16(rec.vert_origin_y)) {
return OTS_FAILURE();
}
}
return true;
}
void ots_vorg_free(OpenTypeFile *file) {
delete file->vorg;
}
} // namespace ots
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