cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  19
  20
  21
  22 #include <com/sun/star/rendering/RepaintResult.hpp>
  23
  24 #include <basegfx/matrix/b2dhommatrix.hxx>
  25 #include <canvas/canvastools.hxx>
  26 #include <cppcanvas/canvas.hxx>
  27
  28 #include "cachedprimitivebase.hxx"
  29
  30 using namespace ::com::sun::star;
  31
  32 namespace cppcanvas
  33 {
  34     namespace internal
  35     {
  36         CachedPrimitiveBase::CachedPrimitiveBase( const CanvasSharedPtr& rCanvas,
  37                                                   bool                   bOnlyRedrawWithSameTransform ) :
  38             mpCanvas( rCanvas ),
  39             mxCachedPrimitive(),
  40             maLastTransformation(),
  41             mbOnlyRedrawWithSameTransform( bOnlyRedrawWithSameTransform )
  42         {
  43             // TODO(F2): also store last view transform, and refuse to
  44             // redraw if changed.
  45         }
  46
  47         bool CachedPrimitiveBase::render( const ::basegfx::B2DHomMatrix& rTransformation ) const
  48         {
  49             SAL_INFO( "cppcanvas.emf", "::cppcanvas::internal::CachedPrimitiveBase::render()" );
  50             SAL_INFO( "cppcanvas.emf", "::cppcanvas::internal::CachedPrimitiveBase: 0x" << std::hex << this );
  51
  52             const rendering::ViewState& rViewState( mpCanvas->getViewState() );
  53             ::basegfx::B2DHomMatrix     aTotalTransform;
  54
  55             ::canvas::tools::getViewStateTransform( aTotalTransform,
  56                                                     rViewState );
  57             aTotalTransform *= rTransformation;
  58
  59             // can we use the cached primitive? For that, it must be
  60             // present in the first place, and, if
  61             // mbOnlyRedrawWithSameTransform is true, the overall
  62             // transformation must be the same.
  63             if( mxCachedPrimitive.is() &&
  64                 (!mbOnlyRedrawWithSameTransform ||
  65                  maLastTransformation == aTotalTransform) )
  66             {
  67                 if( mxCachedPrimitive->redraw( rViewState ) ==
  68                     rendering::RepaintResult::REDRAWN )
  69                 {
  70                     // cached repaint succeeded, done.
  71                     return true;
  72                 }
  73             }
  74
  75             maLastTransformation = aTotalTransform;
  76
  77             // delegate rendering to derived classes
  78             return renderPrimitive( mxCachedPrimitive,
  79                                     rTransformation );
  80         }
  81     }
  82 }
  83
  84 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */