okular/core/rotationjob.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Tobias Koenig <tokoe@kde.org>                   *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  ***************************************************************************/
   9
  10 #include "rotationjob_p.h"
  11
  12 #include <QtGui/QMatrix>
  13
  14 using namespace Okular;
  15
  16 RotationJob::RotationJob( const QImage &image, Rotation oldRotation, Rotation newRotation, int id )
  17     : mImage( image ), mOldRotation( oldRotation ), mNewRotation( newRotation ), mId( id ), m_pd( 0 )
  18 {
  19 }
  20
  21 void RotationJob::setPage( PagePrivate * pd )
  22 {
  23     m_pd = pd;
  24 }
  25
  26 QImage RotationJob::image() const
  27 {
  28     return mRotatedImage;
  29 }
  30
  31 Rotation RotationJob::rotation() const
  32 {
  33     return mNewRotation;
  34 }
  35
  36 int RotationJob::id() const
  37 {
  38     return mId;
  39 }
  40
  41 PagePrivate * RotationJob::page() const
  42 {
  43     return m_pd;
  44 }
  45
  46 void RotationJob::run()
  47 {
  48     if ( mOldRotation == mNewRotation ) {
  49         mRotatedImage = mImage;
  50         return;
  51     }
  52
  53     QMatrix matrix = rotationMatrix( mOldRotation, mNewRotation );
  54
  55     mRotatedImage = mImage.transformed( matrix );
  56 }
  57
  58 QMatrix RotationJob::rotationMatrix( Rotation from, Rotation to )
  59 {
  60     QMatrix matrix;
  61
  62     if ( from == Rotation0 ) {
  63         if ( to == Rotation90 )
  64             matrix.rotate( 90 );
  65         else if ( to == Rotation180 )
  66             matrix.rotate( 180 );
  67         else if ( to == Rotation270 )
  68             matrix.rotate( 270 );
  69     } else if ( from == Rotation90 ) {
  70         if ( to == Rotation180 )
  71             matrix.rotate( 90 );
  72         else if ( to == Rotation270 )
  73             matrix.rotate( 180 );
  74         else if ( to == Rotation0 )
  75             matrix.rotate( 270 );
  76     } else if ( from == Rotation180 ) {
  77         if ( to == Rotation270 )
  78             matrix.rotate( 90 );
  79         else if ( to == Rotation0 )
  80             matrix.rotate( 180 );
  81         else if ( to == Rotation90 )
  82             matrix.rotate( 270 );
  83     } else if ( from == Rotation270 ) {
  84         if ( to == Rotation0 )
  85             matrix.rotate( 90 );
  86         else if ( to == Rotation90 )
  87             matrix.rotate( 180 );
  88         else if ( to == Rotation180 )
  89             matrix.rotate( 270 );
  90     }
  91
  92     return matrix;
  93 }
  94
  95 #include "rotationjob_p.moc"