vcl/source/filter/jpeg/JpegReader.hxx

   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 #ifndef INCLUDED_VCL_SOURCE_FILTER_JPEG_JPEGREADER_HXX
  21 #define INCLUDED_VCL_SOURCE_FILTER_JPEG_JPEGREADER_HXX
  22
  23 #include <vcl/graph.hxx>
  24 #include <vcl/fltcall.hxx>
  25 #include <com/sun/star/uno/Sequence.h>
  26 #include <com/sun/star/beans/PropertyValue.hpp>
  27 #include <com/sun/star/task/XStatusIndicator.hpp>
  28
  29 enum ReadState
  30 {
  31     JPEGREAD_OK,
  32     JPEGREAD_ERROR,
  33     JPEGREAD_NEED_MORE
  34 };
  35
  36 struct JPEGCreateBitmapParam
  37 {
  38     unsigned long nWidth;
  39     unsigned long nHeight;
  40     unsigned long density_unit;
  41     unsigned long X_density;
  42     unsigned long Y_density;
  43     long     bGray;
  44
  45     long     nAlignedWidth;  // these members will be filled by the
  46     bool     bTopDown;      // CreateBitmap method in svtools
  47 };
  48
  49 class JPEGReader : public GraphicReader
  50 {
  51     SvStream&           mrStream;
  52     Bitmap              maBmp;
  53     Bitmap              maBmp1;
  54     BitmapWriteAccess*  mpAcc;
  55     BitmapWriteAccess*  mpAcc1;
  56     unsigned char *     mpBuffer;
  57     long                mnLastPos;
  58     long                mnFormerPos;
  59     long                mnLastLines;
  60     bool                mbSetLogSize;
  61
  62     Graphic CreateIntermediateGraphic( const Bitmap& rBitmap, long nLines );
  63     void    FillBitmap();
  64
  65 public:
  66             JPEGReader( SvStream& rStream, void* pCallData, bool bSetLogSize );
  67     virtual ~JPEGReader();
  68
  69     ReadState   Read( Graphic& rGraphic );
  70     unsigned char * CreateBitmap( JPEGCreateBitmapParam* param );
  71 };
  72
  73 #endif // INCLUDED_VCL_SOURCE_FILTER_JPEG_JPEGREADER_HXX
  74
  75 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */