pngCodec.hpp

/*
 *  Copyright 2011, 2012 Lukas Jirkovsky
 *
 *  This file is part of FotoSHOCKcore.
 *
 *  FotoSHOCKcore 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, version 3 of the License.
 *
 *  FotoSHOCKcore 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 FotoSHOCKcore.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef PNGCODEC_H
#define PNGCODEC_H

#include "../Codec.hpp"

#include <png.h>

namespace FotoSHOCKcore {
namespace IO {

class PngDecoder : public Decoder {
    public:
        PngDecoder(const std::string fileName);
        virtual ~PngDecoder();
        static bool canDecode(const std::string fileName);
        virtual ImageBufferBase* loadImage(unsigned int tileExtent);
        virtual ImageBufferBase* loadImage(unsigned int tileExtent, PixelData format);
    private:
        template <typename ValueType::Enum PixelFormat>
        ImageBufferBase* loadImage(png_bytepp rowPointers, unsigned int width, unsigned int height,
                                   unsigned int tileExtent, PixelData loadData, PixelData pixelData);

        png_structp readStruct;
        png_infop pngInfo;
        PixelData loadData;
};

class PngEncoder : public Encoder {
    public:
        PngEncoder(const std::string fileName);
        virtual ~PngEncoder();
        static Formats::Enum format();
        virtual void saveImage(ImageBufferBase* image, int quality);
    private:
        template <typename ValueType::Enum PixelFormat>
        void saveImage(ImageBufferBase* image, png_bytepp rows);
};

}
}

#endif