cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx

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  28
  29
  30 #include <rtl/logfile.hxx>
  31
  32 #include <com/sun/star/rendering/RepaintResult.hpp>
  33
  34 #include <basegfx/matrix/b2dhommatrix.hxx>
  35 #include <canvas/canvastools.hxx>
  36 #include <cppcanvas/canvas.hxx>
  37
  38 #include "cachedprimitivebase.hxx"
  39
  40 using namespace ::com::sun::star;
  41
  42 namespace cppcanvas
  43 {
  44     namespace internal
  45     {
  46         CachedPrimitiveBase::CachedPrimitiveBase( const CanvasSharedPtr& rCanvas,
  47                                                   bool                   bOnlyRedrawWithSameTransform ) :
  48             mpCanvas( rCanvas ),
  49             mxCachedPrimitive(),
  50             maLastTransformation(),
  51             mbOnlyRedrawWithSameTransform( bOnlyRedrawWithSameTransform )
  52         {
  53             // TODO(F2): also store last view transform, and refuse to
  54             // redraw if changed.
  55         }
  56
  57         bool CachedPrimitiveBase::render( const ::basegfx::B2DHomMatrix& rTransformation ) const
  58         {
  59             RTL_LOGFILE_CONTEXT( aLog, "::cppcanvas::internal::CachedPrimitiveBase::render()" );
  60             RTL_LOGFILE_CONTEXT_TRACE1( aLog, "::cppcanvas::internal::CachedPrimitiveBase: 0x%X", this );
  61
  62             const rendering::ViewState& rViewState( mpCanvas->getViewState() );
  63             ::basegfx::B2DHomMatrix     aTotalTransform;
  64
  65             ::canvas::tools::getViewStateTransform( aTotalTransform,
  66                                                     rViewState );
  67             aTotalTransform *= rTransformation;
  68
  69             // can we use the cached primitive? For that, it must be
  70             // present in the first place, and, if
  71             // mbOnlyRedrawWithSameTransform is true, the overall
  72             // transformation must be the same.
  73             if( mxCachedPrimitive.is() &&
  74                 (!mbOnlyRedrawWithSameTransform ||
  75                  maLastTransformation == aTotalTransform) )
  76             {
  77                 if( mxCachedPrimitive->redraw( rViewState ) ==
  78                     rendering::RepaintResult::REDRAWN )
  79                 {
  80                     // cached repaint succeeded, done.
  81                     return true;
  82                 }
  83             }
  84
  85             maLastTransformation = aTotalTransform;
  86
  87             // delegate rendering to derived classes
  88             return renderPrimitive( mxCachedPrimitive,
  89                                     rTransformation );
  90         }
  91     }
  92 }
  93
  94 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */