File indexing completed on 2025-01-19 03:56:02

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2006-09-15
  * Description : Exiv2 library interface.
  *               Embedded preview loading.
  *
  * SPDX-FileCopyrightText: 2006-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  * SPDX-FileCopyrightText: 2006-2013 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 // Local includes
 
 #include "metaengine_previews.h"
 #include "metaengine_p.h"
 #include "digikam_debug.h"
 #include "digikam_config.h"
 
 #if defined(Q_CC_CLANG)
 #   pragma clang diagnostic push
 #   pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN MetaEnginePreviews::Private
 {
 public:
 
     explicit Private()
         : manager(nullptr)
     {
     }
 
     ~Private()
     {
         delete manager;
     }
 
     void load(Exiv2::Image::AutoPtr image_)     // clazy:exclude=function-args-by-ref
     {
         QMutexLocker lock(&s_metaEngineMutex);
 
         try
         {
 
 #if EXIV2_TEST_VERSION(0,27,99)
 
             image                              = std::move(image_);
 
 #else
 
             image                              = image_;
 
 #endif
             image->readMetadata();
 
             manager                            = new Exiv2::PreviewManager(*image);
             Exiv2::PreviewPropertiesList props = manager->getPreviewProperties();
 
             // reverse order of list, which is smallest-first
 
             Exiv2::PreviewPropertiesList::reverse_iterator it;
 
             for (it = props.rbegin() ; it != props.rend() ; ++it)
             {
                 properties << *it;
             }
         }
         catch (Exiv2::AnyError& e)
         {
             MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load preview data with Exiv2:"), e);
         }
         catch (...)
         {
             qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
         }
     }
 
 public:
 
     Exiv2::Image::AutoPtr           image;
     Exiv2::PreviewManager*          manager;
     QList<Exiv2::PreviewProperties> properties;
 };
 
 MetaEnginePreviews::MetaEnginePreviews(const QString& filePath)
     : d(new Private)
 {
     QMutexLocker lock(&s_metaEngineMutex);
 
     try
     {
 
 #if defined Q_OS_WIN && defined EXV_UNICODE_PATH
 
         Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open((const wchar_t*)filePath.utf16());
 
 #elif defined Q_OS_WIN
 
         Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(QFile::encodeName(filePath).constData());
 
 #else
 
         Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filePath.toUtf8().constData());
 
 #endif
 
 #if EXIV2_TEST_VERSION(0,27,99)
 
         d->load(std::move(image));
 
 #else
 
         d->load(image);
 
 #endif
 
     }
     catch (Exiv2::AnyError& e)
     {
         MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load metadata with Exiv2:"), e);
     }
     catch (...)
     {
         qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
     }
 }
 
 MetaEnginePreviews::MetaEnginePreviews(const QByteArray& imgData)
     : d(new Private)
 {
     QMutexLocker lock(&s_metaEngineMutex);
 
     try
     {
         Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open((Exiv2::byte*)imgData.data(), imgData.size());
 
 #if EXIV2_TEST_VERSION(0,27,99)
 
         d->load(std::move(image));
 
 #else
 
         d->load(image);
 
 #endif
 
     }
     catch (Exiv2::AnyError& e)
     {
         MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load metadata with Exiv2:"), e);
     }
     catch (...)
     {
         qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
     }
 }
 
 MetaEnginePreviews::~MetaEnginePreviews()
 {
     delete d;
 }
 
 bool MetaEnginePreviews::isEmpty()
 {
     return d->properties.isEmpty();
 }
 
 QSize MetaEnginePreviews::originalSize() const
 {
     if (d->image.get())
     {
         return QSize(d->image->pixelWidth(), d->image->pixelHeight());
     }
 
     return QSize();
 }
 
 QString MetaEnginePreviews::originalMimeType() const
 {
     if (d->image.get())
     {
        return QString::fromStdString(d->image->mimeType());
     }
 
     return QString();
 }
 
 int MetaEnginePreviews::count() const
 {
     return d->properties.size();
 }
 
 int MetaEnginePreviews::size() const
 {
     return count();
 }
 
 int MetaEnginePreviews::dataSize(int index)
 {
     if ((index < 0) || (index >= size()))
     {
         return 0;
     }
 
     return d->properties[index].size_;
 }
 
 int MetaEnginePreviews::width(int index)
 {
     if ((index < 0) || (index >= size()))
     {
         return 0;
     }
 
     return d->properties[index].width_;
 }
 
 int MetaEnginePreviews::height(int index)
 {
     if ((index < 0) || (index >= size()))
     {
         return 0;
     }
 
     return d->properties[index].height_;
 }
 
 QString MetaEnginePreviews::mimeType(int index)
 {
     if ((index < 0) || (index >= size()))
     {
         return QString();
     }
 
     return QString::fromStdString(d->properties[index].mimeType_);
 }
 
 QString MetaEnginePreviews::fileExtension(int index)
 {
     if ((index < 0) || (index >= size()))
     {
         return QString();
     }
 
     return QString::fromStdString(d->properties[index].extension_);
 }
 
 QByteArray MetaEnginePreviews::data(int index)
 {
     if ((index < 0) || (index >= size()))
     {
         return QByteArray();
     }
 
     qCDebug(DIGIKAM_METAENGINE_LOG) << "index     : " << index;
     qCDebug(DIGIKAM_METAENGINE_LOG) << "properties: " << count();
 
     QMutexLocker lock(&s_metaEngineMutex);
 
     try
     {
         Exiv2::PreviewImage image = d->manager->getPreviewImage(d->properties[index]);
 
         return QByteArray((const char*)image.pData(), image.size());
     }
     catch (Exiv2::AnyError& e)
     {
         MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load metadata with Exiv2:"), e);
 
         return QByteArray();
     }
     catch (...)
     {
         qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
 
         return QByteArray();
     }
 }
 
 QImage MetaEnginePreviews::image(int index)
 {
     QByteArray previewData = data(index);
     QImage     image;
 
     if (previewData.isEmpty() || !image.loadFromData(previewData))
     {
         return QImage();
     }
 
     return image;
 }
 
 } // namespace Digikam
 
 #if defined(Q_CC_CLANG)
 #   pragma clang diagnostic pop
 #endif