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Libs/png++/png++/info_base.hpp

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+/*
+ * Copyright (C) 2007,2008   Alex Shulgin
+ *
+ * This file is part of png++ the C++ wrapper for libpng.  PNG++ is free
+ * software; the exact copying conditions are as follows:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef PNGPP_INFO_BASE_HPP_INCLUDED
+#define PNGPP_INFO_BASE_HPP_INCLUDED
+
+#include <cassert>
+#include "error.hpp"
+#include "types.hpp"
+
+namespace png
+{
+
+    class io_base;
+
+    /**
+     * \brief Internal class to hold PNG info or end_info.
+     */
+    class info_base
+    {
+        info_base(info_base const&);
+        info_base& operator=(info_base const&);
+
+    public:
+        info_base(io_base& io, png_struct* png)
+            : m_io(io),
+              m_png(png),
+              m_info(png_create_info_struct(m_png))
+        {
+        }
+
+        png_info* get_png_info() const
+        {
+            return m_info;
+        }
+
+        png_info** get_png_info_ptr()
+        {
+            return & m_info;
+        }
+
+    protected:
+        io_base& m_io;
+        png_struct* m_png;
+        png_info* m_info;
+    };
+
+} // namespace png
+
+#endif // PNGPP_INFO_BASE_HPP_INCLUDED