PngReader.h

/* Copyright (C) 2017 Marc Duerner
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301  USA
 */
 
#ifndef PT_GFX_PNGREADER_H
#define PT_GFX_PNGREADER_H
 
#include <Pt/Gfx/Api.h>
#include <ios>
 
namespace Pt {
 
namespace Gfx {

class PT_GFX_API PngReader
{
    public:
        PngReader();

        PngReader(std::istream& is, Image& image);

        ~PngReader();

        void attach(std::istream& is, Image& image);

        void detach();

        void reset();

        Image* advance(std::streamsize importSize = 0);

        Image& get();
 
    private:
        class PngReaderImpl* _impl;
};
 
} // namespace
 
} // namespace
 
#endif