lib/image/format/png.h

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//
// canola - canon canola 1614p emulator
// Copyright (C) 2011 Peter Miller
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 3, as
// published by the Free Software Foundation.
//
// This program 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.
//

#ifndef LIB_IMAGE_FORMAT_PNG_H
#define LIB_IMAGE_FORMAT_PNG_H

#include <lib/image/format.h>

class image_format_png:
    public image_format
{
public:
    virtual ~image_format_png();

    static pointer create(const std::string &filename);

    static pointer create_blank(int width, int height);

protected:
    // See base class for documentation.
    const char *type_name() const;

    // See base class for documentation.
    void save_to_file(const std::string &filename) const;

private:
    bool calc_needs_alpha() const;

    bool calc_needs_rgb() const;

    image_format_png();

    image_format_png(int width, int height, data_t *data);

    image_format_png(int width, int height);

    image_format_png(const image_format_png &);

    image_format_png &operator=(const image_format_png &);
};

#endif // LIB_IMAGE_FORMAT_PNG_H