sw/source/core/layout/virtoutp.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 "virtoutp.hxx"
  21 #include <viewopt.hxx>
  22 #include <rootfrm.hxx>
  23 #include <osl/diagnose.h>
  24
  25 /* The SWLayVout class manages the virtual output devices.
  26  * RootFrame has a static member of this class which is created in FrameInit
  27  * and destroyed in FrameFinit.
  28  * */
  29
  30 bool SwRootFrame::FlushVout()
  31 {
  32     if (SwRootFrame::s_pVout->IsFlushable())
  33     {
  34         SwRootFrame::s_pVout->Flush_();
  35         return true;
  36     }
  37     return false;
  38 }
  39
  40 bool SwRootFrame::HasSameRect( const SwRect& rRect )
  41 {
  42     if (SwRootFrame::s_pVout->IsFlushable())
  43         return ( rRect == SwRootFrame::s_pVout->GetOrgRect() );
  44     return false;
  45 }
  46
  47 /** method to set mapping/pixel offset for virtual output device
  48
  49     OD 12.11.2002 #96272# - method implements two solutions for the mapping of
  50     the virtual output device:
  51     The old solution set the origin of the mapping mode, which will be used in
  52     the virtual output device. This causes several paint errors, because of the
  53     different roundings in the virtual output device and the original output device.
  54     The new solution avoids the rounding differences between virtual and original
  55     output device by setting a pixel offset at the virtual output device.
  56     A define controls, which solution is used, in order to switch in escalation
  57     back to old solution.
  58
  59     @param _pOrgOutDev
  60     input parameter - constant instance of the original output device, for which
  61     the virtual output device is created.
  62
  63     @param _pVirDev
  64     input/output parameter - instance of the virtual output device.
  65
  66     @param _rNewOrigin
  67     input parameter - constant instance of the origin, which will be used in
  68     the virtual output device
  69 */
  70 // define to control, if old or new solution for setting the mapping for
  71 // a virtual output device is used.
  72 static void SetMappingForVirtDev(  const Point&    _rNewOrigin,
  73                             const vcl::RenderContext* _pOrgOutDev,
  74                             vcl::RenderContext*  _pVirDev )
  75 {
  76         // new solution: set pixel offset at virtual output device
  77         Point aPixelOffset = _pOrgOutDev->LogicToPixel( _rNewOrigin );
  78         _pVirDev->SetPixelOffset( Size( -aPixelOffset.X(), -aPixelOffset.Y() ) );
  79 }
  80
  81 // rSize must be pixel coordinates!
  82 bool SwLayVout::DoesFit( const Size &rNew )
  83 {
  84     if( rNew.Height() > VIRTUALHEIGHT )
  85         return false;
  86     if( rNew.IsEmpty() )
  87         return false;
  88     if( rNew.Width() <= m_aSize.Width() )
  89         return true;
  90     if( !m_pVirDev )
  91     {
  92         m_pVirDev = VclPtr<VirtualDevice>::Create();
  93         m_pVirDev->SetLineColor();
  94         if( m_pOut )
  95         {
  96             if( m_pVirDev->GetFillColor() != m_pOut->GetFillColor() )
  97                 m_pVirDev->SetFillColor( m_pOut->GetFillColor() );
  98         }
  99     }
 100
 101     if( rNew.Width() > m_aSize.Width() )
 102     {
 103         m_aSize.setWidth( rNew.Width() );
 104         if( !m_pVirDev->SetOutputSizePixel( m_aSize ) )
 105         {
 106             m_pVirDev.disposeAndClear();
 107             m_aSize.setWidth( 0 );
 108             return false;
 109         }
 110     }
 111     return true;
 112 }
 113
 114 ///     change 2nd parameter <rRect> - no longer <const>
 115 ///     in order to return value of class member variable <aRect>, if virtual
 116 ///     output is used.
 117 ///    <aRect> contains the rectangle that represents the area the virtual
 118 ///     output device is used for and that is flushed at the end.
 119 void SwLayVout::Enter(  SwViewShell *pShell, SwRect &rRect, bool bOn )
 120 {
 121     Flush();
 122
 123 #ifdef DBG_UTIL
 124     if( pShell->GetViewOptions()->IsTest3() )
 125     {
 126         ++m_nCount;
 127         return;
 128     }
 129 #endif
 130
 131     bOn = bOn && !m_nCount && rRect.HasArea() && pShell->GetWin();
 132     ++m_nCount;
 133     if( !bOn )
 134         return;
 135
 136     m_pShell = pShell;
 137     m_pOut = nullptr;
 138     OutputDevice *pO = m_pShell->GetOut();
 139 // We don't cheat on printers or virtual output devices...
 140     if( OUTDEV_WINDOW != pO->GetOutDevType() )
 141         return;
 142
 143     m_pOut = pO;
 144     Size aPixSz( m_pOut->PixelToLogic( Size( 1,1 )) );
 145     SwRect aTmp( rRect );
 146     aTmp.AddWidth(aPixSz.Width()/2 + 1 );
 147     aTmp.AddHeight(aPixSz.Height()/2 + 1 );
 148     tools::Rectangle aTmpRect( pO->LogicToPixel( aTmp.SVRect() ) );
 149
 150     OSL_ENSURE( !m_pShell->GetWin()->IsReallyVisible() ||
 151             aTmpRect.GetWidth() <= m_pShell->GetWin()->GetOutputSizePixel().Width() + 2,
 152             "Paintwidth bigger than visarea?" );
 153     // Does the rectangle fit in our buffer?
 154     if( !DoesFit( aTmpRect.GetSize() ) )
 155     {
 156         m_pOut = nullptr;
 157         return;
 158     }
 159
 160     m_aRect = SwRect( pO->PixelToLogic( aTmpRect ) );
 161
 162     SetOutDev( m_pShell, m_pVirDev );
 163
 164     if( m_pVirDev->GetFillColor() != m_pOut->GetFillColor() )
 165         m_pVirDev->SetFillColor( m_pOut->GetFillColor() );
 166
 167     MapMode aMapMode( m_pOut->GetMapMode() );
 168     // use method to set mapping
 169     //aMapMode.SetOrigin( Point(0,0) - aRect.Pos() );
 170     ::SetMappingForVirtDev( m_aRect.Pos(), m_pOut, m_pVirDev );
 171
 172     if( aMapMode != m_pVirDev->GetMapMode() )
 173         m_pVirDev->SetMapMode( aMapMode );
 174
 175     // set value of parameter <rRect>
 176     rRect = m_aRect;
 177
 178 }
 179
 180 void SwLayVout::Flush_()
 181 {
 182     OSL_ENSURE( m_pVirDev, "SwLayVout::DrawOut: nothing left Toulouse" );
 183     m_pOut->DrawOutDev( m_aRect.Pos(), m_aRect.SSize(),
 184                       m_aRect.Pos(), m_aRect.SSize(), *m_pVirDev );
 185     SetOutDev( m_pShell, m_pOut );
 186     m_pOut = nullptr;
 187 }
 188
 189 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */