slideshow/source/engine/transitions/checkerboardwipe.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_slideshow.hxx"
  33
  34 #include <canvas/debug.hxx>
  35 #include <basegfx/matrix/b2dhommatrix.hxx>
  36 #include "checkerboardwipe.hxx"
  37
  38
  39 namespace slideshow {
  40 namespace internal {
  41
  42 ::basegfx::B2DPolyPolygon CheckerBoardWipe::operator () ( double t )
  43 {
  44     const double d = (1.0 / m_unitsPerEdge);
  45     ::basegfx::B2DHomMatrix aTransform;
  46     aTransform.scale( ::basegfx::pruneScaleValue( d * 2.0 * t ),
  47                       ::basegfx::pruneScaleValue( d ) );
  48
  49     ::basegfx::B2DPolyPolygon res;
  50     for ( sal_Int32 i = m_unitsPerEdge; i--; )
  51     {
  52         ::basegfx::B2DHomMatrix transform( aTransform );
  53         if ((i % 2) == 1) // odd line
  54             transform.translate( -d, 0.0 );
  55         for ( sal_Int32 j = (m_unitsPerEdge / 2) + 1; j--; )
  56         {
  57             ::basegfx::B2DPolyPolygon poly( m_unitRect );
  58             poly.transform( transform );
  59             res.append( poly );
  60             transform.translate( d * 2.0, 0.0 );
  61         }
  62         aTransform.translate( 0.0, d ); // next line
  63     }
  64     return res;
  65 }
  66
  67 }
  68 }