gwenview/lib/exiv2imageloader.cpp

   1 // vim: set tabstop=4 shiftwidth=4 noexpandtab:
   2 /*
   3 Gwenview: an image viewer
   4 Copyright 2007 Aurélien Gâteau <aurelien.gateau@free.fr>
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19
  20 */
  21 // Self
  22 #include "exiv2imageloader.h"
  23
  24 // Qt
  25 #include <QByteArray>
  26 #include <QString>
  27
  28 // KDE
  29
  30 // Exiv2
  31 #include <exiv2/error.hpp>
  32 #include <exiv2/types.hpp>
  33
  34 // Local
  35
  36 namespace Gwenview {
  37
  38
  39 struct Exiv2ImageLoaderPrivate {
  40         Exiv2::Image::AutoPtr mImage;
  41         QString mErrorMessage;
  42 };
  43
  44
  45 Exiv2ImageLoader::Exiv2ImageLoader()
  46 : d(new Exiv2ImageLoaderPrivate) {
  47 }
  48
  49
  50 Exiv2ImageLoader::~Exiv2ImageLoader() {
  51         delete d;
  52 }
  53
  54
  55 bool Exiv2ImageLoader::load(const QByteArray& data) {
  56         try {
  57                 d->mImage = Exiv2::ImageFactory::open((unsigned char*)data.constData(), data.size());
  58                 d->mImage->readMetadata();
  59 #if EXIV2_VERSION >= EXIV2_MAKE_VERSION(0, 14, 0)
  60         // For some unknown reason, trying to catch Exiv2::Error fails with Exiv2
  61         // >=0.14. For now, just catch std::exception. I would welcome any
  62         // explanation.
  63         } catch (const std::exception& error) {
  64                 d->mErrorMessage = error.what();
  65 #else
  66         // In libexiv2 0.12, Exiv2::Error::what() returns an std::string.
  67         } catch (const Exiv2::Error& error) {
  68                 d->mErrorMessage = error.what().c_str();
  69 #endif
  70                 return false;
  71         }
  72         return true;
  73 }
  74
  75
  76 QString Exiv2ImageLoader::errorMessage() const {
  77         return d->mErrorMessage;
  78 }
  79
  80
  81 Exiv2::Image::AutoPtr Exiv2ImageLoader::popImage() {
  82         return d->mImage;
  83 }
  84
  85
  86 } // namespace