1 files changed, 43 insertions, 0 deletions
diff --git a/gfx/ots/src/prep.cc b/gfx/ots/src/prep.cc
new file mode 100644
index 0000000000..943bb45b91
--- /dev/null
+++ b/gfx/ots/src/prep.cc
@@ -0,0 +1,43 @@
+// Copyright (c) 2009-2017 The OTS 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 "prep.h"
+
+// prep - Control Value Program
+// http://www.microsoft.com/typography/otspec/prep.htm
+
+namespace ots {
+
+bool OpenTypePREP::Parse(const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+
+  if (length >= 128 * 1024u) {
+    // almost all prep tables are less than 9k bytes.
+    return Error("Table length %ld > 120K", length);
+  }
+
+  if (!table.Skip(length)) {
+    return Error("Failed to read table of length %ld", length);
+  }
+
+  this->m_data = data;
+  this->m_length = length;
+  return true;
+}
+
+bool OpenTypePREP::Serialize(OTSStream *out) {
+  if (!out->Write(this->m_data, this->m_length)) {
+    return Error("Failed to write table length");
+  }
+
+  return true;
+}
+
+bool OpenTypePREP::ShouldSerialize() {
+  return Table::ShouldSerialize() &&
+         // this table is not for CFF fonts.
+         GetFont()->GetTable(OTS_TAG_GLYF) != NULL;
+}
+
+}  // namespace ots