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 #include <tools/stream.hxx>
  24
  25 #include "jpeg/Exif.hxx"
  26 #include <memory>
  27
  28 GraphicNativeMetadata::GraphicNativeMetadata() :
  29     mRotation(0)
  30 {}
  31
  32 GraphicNativeMetadata::~GraphicNativeMetadata()
  33 {}
  34
  35
  36 bool GraphicNativeMetadata::read(Graphic const & rGraphic)
  37 {
  38     GfxLink aLink = rGraphic.GetGfxLink();
  39     if ( aLink.GetType() != GfxLinkType::NativeJpg )
  40         return false;
  41
  42     sal_uInt32 aDataSize = aLink.GetDataSize();
  43     if (!aDataSize)
  44         return false;
  45
  46     std::unique_ptr<sal_uInt8[]> aBuffer(new sal_uInt8[aDataSize]);
  47
  48     memcpy(aBuffer.get(), aLink.GetData(), aDataSize);
  49     SvMemoryStream aMemoryStream(aBuffer.get(), aDataSize, StreamMode::READ);
  50
  51     Exif aExif;
  52     aExif.read(aMemoryStream);
  53     mRotation = aExif.getRotation();
  54
  55     return true;
  56 }
  57
  58 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */