LibreOffice Module vcl (master)  1
jpeg.cxx
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /*
3  * This file is part of the LibreOffice project.
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6  * License, v. 2.0. If a copy of the MPL was not distributed with this
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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
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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 "JpegReader.hxx"
21 #include "JpegWriter.hxx"
22 #include "jpeg.hxx"
23 
24 #include <vcl/graphicfilter.hxx>
25 
26 VCL_DLLPUBLIC bool ImportJPEG( SvStream& rInputStream, Graphic& rGraphic, GraphicFilterImportFlags nImportFlags, BitmapScopedWriteAccess* ppAccess )
27 {
28  bool bReturn = true;
29 
30  std::shared_ptr<GraphicReader> pContext = rGraphic.GetContext();
31  rGraphic.SetContext(nullptr);
32  JPEGReader* pJPEGReader = dynamic_cast<JPEGReader*>( pContext.get() );
33  if (!pJPEGReader)
34  {
35  pContext = std::make_shared<JPEGReader>( rInputStream, nImportFlags );
36  pJPEGReader = static_cast<JPEGReader*>( pContext.get() );
37  }
38 
39  if( nImportFlags & GraphicFilterImportFlags::ForPreview )
40  {
41  pJPEGReader->SetPreviewSize( Size(128,128) );
42  }
43  else
44  {
45  pJPEGReader->DisablePreviewMode();
46  }
47 
48  ReadState eReadState = pJPEGReader->Read( rGraphic, nImportFlags, ppAccess );
49 
50  if( eReadState == JPEGREAD_ERROR )
51  {
52  bReturn = false;
53  }
54  else if( eReadState == JPEGREAD_NEED_MORE )
55  {
56  rGraphic.SetContext( pContext );
57  }
58 
59  return bReturn;
60 }
61 
62 bool ExportJPEG(SvStream& rOutputStream, const Graphic& rGraphic,
63  const css::uno::Sequence<css::beans::PropertyValue>* pFilterData,
64  bool* pExportWasGrey)
65 {
66  JPEGWriter aJPEGWriter( rOutputStream, pFilterData, pExportWasGrey );
67  bool bReturn = aJPEGWriter.Write( rGraphic );
68  return bReturn;
69 }
70 
71 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
ReadState Read(Graphic &rGraphic, GraphicFilterImportFlags nImportFlags, BitmapScopedWriteAccess *ppAccess)
Definition: JpegReader.cxx:285
void SetContext(const std::shared_ptr< GraphicReader > &pReader)
Definition: graph.cxx:501
#define VCL_DLLPUBLIC
Definition: dllapi.h:29
std::shared_ptr< GraphicReader > & GetContext()
Definition: graph.cxx:496
ReadState
Definition: gifread.cxx:41
This template handles BitmapAccess the RAII way.
void DisablePreviewMode()
Definition: impgraph.cxx:86
bool ExportJPEG(SvStream &rOutputStream, const Graphic &rGraphic, const css::uno::Sequence< css::beans::PropertyValue > *pFilterData, bool *pExportWasGrey)
Definition: jpeg.cxx:62
void SetPreviewSize(const Size &)
Definition: impgraph.cxx:92
VCL_DLLPUBLIC bool ImportJPEG(SvStream &rInputStream, Graphic &rGraphic, GraphicFilterImportFlags nImportFlags, BitmapScopedWriteAccess *ppAccess)
Definition: jpeg.cxx:26
GraphicFilterImportFlags
bool Write(const Graphic &rGraphic)
Definition: JpegWriter.cxx:187