info_base.hpp

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00001 /*
00002  * Copyright (C) 2007   Alex Shulgin
00003  *
00004  * This file is part of png++ the C++ wrapper for libpng.  Png++ is free
00005  * software; the exact copying conditions are as follows:
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions are met:
00009  *
00010  * 1. Redistributions of source code must retain the above copyright notice,
00011  * this list of conditions and the following disclaimer.
00012  *
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  * notice, this list of conditions and the following disclaimer in the
00015  * documentation and/or other materials provided with the distribution.
00016  *
00017  * 3. The name of the author may not be used to endorse or promote products
00018  * derived from this software without specific prior written permission.
00019  *
00020  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00021  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00022  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00023  * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00024  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00025  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030  */
00031 #ifndef PNGPP_INFO_BASE_HPP_INCLUDED
00032 #define PNGPP_INFO_BASE_HPP_INCLUDED
00033 
00034 #include <cassert>
00035 #include "error.hpp"
00036 #include "types.hpp"
00037 
00038 namespace png
00039 {
00040 
00041     class io_base;
00042 
00046     class info_base
00047     {
00048         info_base(info_base const&);
00049         info_base& operator=(info_base const&);
00050 
00051     public:
00052         info_base(io_base& io, png_struct* png)
00053             : m_io(io),
00054               m_png(png),
00055               m_info(png_create_info_struct(m_png))
00056         {
00057         }
00058 
00059         png_info* get_png_info() const
00060         {
00061             return m_info;
00062         }
00063 
00064         png_info** get_png_info_ptr()
00065         {
00066             return & m_info;
00067         }
00068 
00069     protected:
00070         io_base& m_io;
00071         png_struct* m_png;
00072         png_info* m_info;
00073     };
00074 
00075 } // namespace png
00076 
00077 #endif // PNGPP_INFO_BASE_HPP_INCLUDED

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