diff -r 000000000000 -r 6474c204b198 gfx/ots/src/cvt.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/ots/src/cvt.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+// 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 "cvt.h"
+
+// cvt - Control Value Table
+// http://www.microsoft.com/typography/otspec/cvt.htm
+
+#define TABLE_NAME "cvt"
+
+namespace ots {
+
+bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+
+  OpenTypeCVT *cvt = new OpenTypeCVT;
+  file->cvt = cvt;
+
+  if (length >= 128 * 1024u) {
+    return OTS_FAILURE_MSG("Length (%d) > 120K");  // almost all cvt tables are less than 4k bytes.
+  }
+
+  if (length % 2 != 0) {
+    return OTS_FAILURE_MSG("Uneven cvt length (%d)", length);
+  }
+
+  if (!table.Skip(length)) {
+    return OTS_FAILURE_MSG("Length too high");
+  }
+
+  cvt->data = data;
+  cvt->length = length;
+  return true;
+}
+
+bool ots_cvt_should_serialise(OpenTypeFile *file) {
+  if (!file->glyf) {
+    return false;  // this table is not for CFF fonts.
+  }
+  return g_transcode_hints && file->cvt;
+}
+
+bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) {
+  const OpenTypeCVT *cvt = file->cvt;
+
+  if (!out->Write(cvt->data, cvt->length)) {
+    return OTS_FAILURE_MSG("Failed to write CVT table");
+  }
+
+  return true;
+}
+
+void ots_cvt_free(OpenTypeFile *file) {
+  delete file->cvt;
+}
+
+}  // namespace ots