cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: cachedprimitivebase.cxx,v $
  10  * $Revision: 1.4 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_cppcanvas.hxx"
  33
  34 #include <rtl/logfile.hxx>
  35
  36 #include <com/sun/star/rendering/RepaintResult.hpp>
  37
  38 #include <basegfx/matrix/b2dhommatrix.hxx>
  39 #include <canvas/canvastools.hxx>
  40 #include <cppcanvas/canvas.hxx>
  41
  42 #include "cachedprimitivebase.hxx"
  43
  44 using namespace ::com::sun::star;
  45
  46 namespace cppcanvas
  47 {
  48     namespace internal
  49     {
  50         CachedPrimitiveBase::CachedPrimitiveBase( const CanvasSharedPtr& rCanvas,
  51                                                   bool                   bOnlyRedrawWithSameTransform ) :
  52             mpCanvas( rCanvas ),
  53             mxCachedPrimitive(),
  54             maLastTransformation(),
  55             mbOnlyRedrawWithSameTransform( bOnlyRedrawWithSameTransform )
  56         {
  57             // TODO(F2): also store last view transform, and refuse to
  58             // redraw if changed.
  59         }
  60
  61         bool CachedPrimitiveBase::render( const ::basegfx::B2DHomMatrix& rTransformation ) const
  62         {
  63             RTL_LOGFILE_CONTEXT( aLog, "::cppcanvas::internal::CachedPrimitiveBase::render()" );
  64             RTL_LOGFILE_CONTEXT_TRACE1( aLog, "::cppcanvas::internal::CachedPrimitiveBase: 0x%X", this );
  65
  66             const rendering::ViewState& rViewState( mpCanvas->getViewState() );
  67             ::basegfx::B2DHomMatrix     aTotalTransform;
  68
  69             ::canvas::tools::getViewStateTransform( aTotalTransform,
  70                                                     rViewState );
  71             aTotalTransform *= rTransformation;
  72
  73             // can we use the cached primitive? For that, it must be
  74             // present in the first place, and, if
  75             // mbOnlyRedrawWithSameTransform is true, the overall
  76             // transformation must be the same.
  77             if( mxCachedPrimitive.is() &&
  78                 (!mbOnlyRedrawWithSameTransform ||
  79                  maLastTransformation == aTotalTransform) )
  80             {
  81                 if( mxCachedPrimitive->redraw( rViewState ) ==
  82                     rendering::RepaintResult::REDRAWN )
  83                 {
  84                     // cached repaint succeeded, done.
  85                     return true;
  86                 }
  87             }
  88
  89             maLastTransformation = aTotalTransform;
  90
  91             // delegate rendering to derived classes
  92             return render( mxCachedPrimitive,
  93                            rTransformation );
  94         }
  95     }
  96 }