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diff --git a/sfntly/data/font_output_stream.h b/sfntly/data/font_output_stream.h
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+++ b/sfntly/data/font_output_stream.h
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+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SFNTLY_CPP_SRC_SFNTLY_DATA_FONT_OUTPUT_STREAM_H_
+#define SFNTLY_CPP_SRC_SFNTLY_DATA_FONT_OUTPUT_STREAM_H_
+
+#include "sfntly/port/type.h"
+#include "sfntly/port/output_stream.h"
+
+namespace sfntly {
+
+// An output stream for writing font data.
+// The data types used are as listed:
+// BYTE       8-bit unsigned integer.
+// CHAR       8-bit signed integer.
+// USHORT     16-bit unsigned integer.
+// SHORT      16-bit signed integer.
+// UINT24     24-bit unsigned integer.
+// ULONG      32-bit unsigned integer.
+// LONG       32-bit signed integer.
+// Fixed      32-bit signed fixed-point number (16.16)
+// FUNIT      Smallest measurable distance in the em space.
+// FWORD      16-bit signed integer (SHORT) that describes a quantity in FUnits.
+// UFWORD     16-bit unsigned integer (USHORT) that describes a quantity in
+//            FUnits.
+// F2DOT14    16-bit signed fixed number with the low 14 bits of fraction (2.14)
+// LONGDATETIME  Date represented in number of seconds since 12:00 midnight,
+//               January 1, 1904. The value is represented as a signed 64-bit
+//               integer.
+
+// Note: The wrapped output stream is *NOT* reference counted (because it's
+//       meaningless to ref-count an I/O stream).
+class FontOutputStream : public OutputStream {
+ public:
+  explicit FontOutputStream(OutputStream* os);
+  virtual ~FontOutputStream();
+
+  virtual size_t position() { return position_; }
+
+  virtual void Write(byte_t b);
+  virtual void Write(ByteVector* b);
+  virtual void Write(ByteVector* b, int32_t off, int32_t len);
+  virtual void Write(byte_t* b, int32_t off, int32_t len);
+  virtual void WriteChar(byte_t c);
+  virtual void WriteUShort(int32_t us);
+  virtual void WriteShort(int32_t s);
+  virtual void WriteUInt24(int32_t ui);
+  virtual void WriteULong(int64_t ul);
+  virtual void WriteLong(int64_t l);
+  virtual void WriteFixed(int32_t l);
+  virtual void WriteDateTime(int64_t date);
+
+  // Note: C++ port only.
+  virtual void Flush();
+  virtual void Close();
+
+ private:
+  // Note: we do not use the variable name out as in Java because it has
+  //       special meaning in VC++ and will be very confusing.
+  OutputStream* stream_;
+  size_t position_;
+};
+
+}  // namespace sfntly
+
+#endif  // SFNTLY_CPP_SRC_SFNTLY_DATA_FONT_OUTPUT_STREAM_H_