dimgheifloader.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2019-09-26
 * Description : A HEIF IO file for DImg framework
 *
 * Copyright (C) 2019-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * Other HEIF loader implementions:
 *     https://github.com/KDE/krita/tree/master/plugins/impex/heif
 *     https://github.com/jakar/qt-heif-image-plugin
 *     https://github.com/ImageMagick/ImageMagick/blob/master/coders/heic.c
 *     https://github.com/GNOME/gimp/blob/master/plug-ins/common/file-heif.c
 *
 * Specification: https://nokiatech.github.io/heif/technical.html
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * 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.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_DIMG_HEIF_LOADER_H
#define DIGIKAM_DIMG_HEIF_LOADER_H
 
// Local includes
 
#include "dimg.h"
#include "dimgloader.h"
#include "heif.h"
 
using namespace Digikam;
 
namespace Digikam
{
 
class DImgHEIFLoader : public DImgLoader
{
 
public:
 
    explicit DImgHEIFLoader(DImg* const image);
    ~DImgHEIFLoader()                                                      override;
 
    bool load(const QString& filePath, DImgLoaderObserver* const observer) override;
    bool save(const QString& filePath, DImgLoaderObserver* const observer) override;
 
    bool hasAlpha()                                                  const override;
    bool sixteenBit()                                                const override;
    bool isReadOnly()                                                const override;
 
    static int x265MaxBitsDepth();
 
private:
 
    bool isHeifSuccess(struct heif_error* const error);
 
 
    bool readHEICColorProfile(struct heif_image_handle* const image_handle);
    bool readHEICImageByID(struct heif_context* const heif_context,
                           heif_item_id image_id);
 
    bool readHEICImageByHandle(struct heif_image_handle* image_handle,
                               struct heif_image* heif_image, bool loadImageData);
 
 
    bool saveHEICColorProfile(struct heif_image* const image);
 
    bool saveHEICMetadata(struct heif_context* const heif_context,
                          struct heif_image_handle* const image_handle);
 
private:
 
    bool                m_sixteenBit;
    bool                m_hasAlpha;
 
    DImgLoaderObserver* m_observer;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_DIMG_HEIF_LOADER_H