Line data    Source code

       1             : /*
       2             :  * Copyright 2011 Google Inc. All Rights Reserved.
       3             :  *
       4             :  * Licensed under the Apache License, Version 2.0 (the "License");
       5             :  * you may not use this file except in compliance with the License.
       6             :  * You may obtain a copy of the License at
       7             :  *
       8             :  *      http://www.apache.org/licenses/LICENSE-2.0
       9             :  *
      10             :  * Unless required by applicable law or agreed to in writing, software
      11             :  * distributed under the License is distributed on an "AS IS" BASIS,
      12             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      13             :  * See the License for the specific language governing permissions and
      14             :  * limitations under the License.
      15             :  */
      16             : 
      17             : #ifndef SFNTLY_CPP_SRC_SFNTLY_DATA_FONT_OUTPUT_STREAM_H_
      18             : #define SFNTLY_CPP_SRC_SFNTLY_DATA_FONT_OUTPUT_STREAM_H_
      19             : 
      20             : #include "sfntly/port/type.h"
      21             : #include "sfntly/port/output_stream.h"
      22             : 
      23             : namespace sfntly {
      24             : 
      25             : // An output stream for writing font data.
      26             : // The data types used are as listed:
      27             : // BYTE       8-bit unsigned integer.
      28             : // CHAR       8-bit signed integer.
      29             : // USHORT     16-bit unsigned integer.
      30             : // SHORT      16-bit signed integer.
      31             : // UINT24     24-bit unsigned integer.
      32             : // ULONG      32-bit unsigned integer.
      33             : // LONG       32-bit signed integer.
      34             : // Fixed      32-bit signed fixed-point number (16.16)
      35             : // FUNIT      Smallest measurable distance in the em space.
      36             : // FWORD      16-bit signed integer (SHORT) that describes a quantity in FUnits.
      37             : // UFWORD     16-bit unsigned integer (USHORT) that describes a quantity in
      38             : //            FUnits.
      39             : // F2DOT14    16-bit signed fixed number with the low 14 bits of fraction (2.14)
      40             : // LONGDATETIME  Date represented in number of seconds since 12:00 midnight,
      41             : //               January 1, 1904. The value is represented as a signed 64-bit
      42             : //               integer.
      43             : 
      44             : // Note: The wrapped output stream is *NOT* reference counted (because it's
      45             : //       meaningless to ref-count an I/O stream).
      46             : class FontOutputStream : public OutputStream {
      47             :  public:
      48             :   explicit FontOutputStream(OutputStream* os);
      49             :   virtual ~FontOutputStream();
      50             : 
      51           0 :   virtual size_t position() { return position_; }
      52             : 
      53             :   virtual void Write(byte_t b);
      54             :   virtual void Write(ByteVector* b);
      55             :   virtual void Write(ByteVector* b, int32_t off, int32_t len);
      56             :   virtual void Write(byte_t* b, int32_t off, int32_t len);
      57             :   virtual void WriteChar(byte_t c);
      58             :   virtual void WriteUShort(int32_t us);
      59             :   virtual void WriteShort(int32_t s);
      60             :   virtual void WriteUInt24(int32_t ui);
      61             :   virtual void WriteULong(int64_t ul);
      62             :   virtual void WriteLong(int64_t l);
      63             :   virtual void WriteFixed(int32_t l);
      64             :   virtual void WriteDateTime(int64_t date);
      65             : 
      66             :   // Note: C++ port only.
      67             :   virtual void Flush();
      68             :   virtual void Close();
      69             : 
      70             :  private:
      71             :   // Note: we do not use the variable name out as in Java because it has
      72             :   //       special meaning in VC++ and will be very confusing.
      73             :   OutputStream* stream_;
      74             :   size_t position_;
      75             : };
      76             : 
      77             : }  // namespace sfntly
      78             : 
      79             : #endif  // SFNTLY_CPP_SRC_SFNTLY_DATA_FONT_OUTPUT_STREAM_H_