1 files changed, 46 insertions, 0 deletions
diff --git a/gfx/ots/src/cvt.cc b/gfx/ots/src/cvt.cc
new file mode 100644
index 0000000000..2e0257889a
--- /dev/null
+++ b/gfx/ots/src/cvt.cc
@@ -0,0 +1,46 @@
+// 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 "cvt.h"
+
+// cvt - Control Value Table
+// http://www.microsoft.com/typography/otspec/cvt.htm
+
+namespace ots {
+
+bool OpenTypeCVT::Parse(const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+
+  if (length >= 128 * 1024u) {
+    return Error("Length (%d) > 120K");  // almost all cvt tables are less than 4k bytes.
+  }
+
+  if (length % 2 != 0) {
+    return Error("Uneven table length (%d)", length);
+  }
+
+  if (!table.Skip(length)) {
+    return Error("Table length too high");
+  }
+
+  this->data = data;
+  this->length = length;
+  return true;
+}
+
+bool OpenTypeCVT::Serialize(OTSStream *out) {
+  if (!out->Write(this->data, this->length)) {
+    return Error("Failed to write cvt table");
+  }
+
+  return true;
+}
+
+bool OpenTypeCVT::ShouldSerialize() {
+  return Table::ShouldSerialize() &&
+         // this table is not for CFF fonts.
+         GetFont()->GetTable(OTS_TAG_GLYF) != NULL;
+}
+
+}  // namespace ots