vcl/source/filter/GraphicNativeMetadata.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <vcl/GraphicNativeMetadata.hxx>
  21
  22 #include <vcl/gfxlink.hxx>
  23
  24 #include "jpeg/Exif.hxx"
  25 #include <memory>
  26
  27 GraphicNativeMetadata::GraphicNativeMetadata() :
  28     mRotation(0)
  29 {}
  30
  31 GraphicNativeMetadata::~GraphicNativeMetadata()
  32 {}
  33
  34
  35 bool GraphicNativeMetadata::read(Graphic& rGraphic)
  36 {
  37     GfxLink aLink = rGraphic.GetLink();
  38     if ( aLink.GetType() != GfxLinkType::NativeJpg )
  39         return false;
  40
  41     sal_uInt32 aDataSize = aLink.GetDataSize();
  42     if (!aDataSize)
  43         return false;
  44
  45     std::unique_ptr<sal_uInt8[]> aBuffer(new sal_uInt8[aDataSize]);
  46
  47     memcpy(aBuffer.get(), aLink.GetData(), aDataSize);
  48     SvMemoryStream aMemoryStream(aBuffer.get(), aDataSize, StreamMode::READ);
  49
  50     Exif aExif;
  51     aExif.read(aMemoryStream);
  52     mRotation = aExif.getRotation();
  53
  54     return true;
  55 }
  56
  57 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */