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27*cdf0e10cSrcweir 
28*cdf0e10cSrcweir // MARKER(update_precomp.py): autogen include statement, do not remove
29*cdf0e10cSrcweir #include "precompiled_slideshow.hxx"
30*cdf0e10cSrcweir 
31*cdf0e10cSrcweir #include <canvas/debug.hxx>
32*cdf0e10cSrcweir #include <basegfx/matrix/b2dhommatrix.hxx>
33*cdf0e10cSrcweir #include "checkerboardwipe.hxx"
34*cdf0e10cSrcweir 
35*cdf0e10cSrcweir 
36*cdf0e10cSrcweir namespace slideshow {
37*cdf0e10cSrcweir namespace internal {
38*cdf0e10cSrcweir 
39*cdf0e10cSrcweir ::basegfx::B2DPolyPolygon CheckerBoardWipe::operator () ( double t )
40*cdf0e10cSrcweir {
41*cdf0e10cSrcweir     const double d = (1.0 / m_unitsPerEdge);
42*cdf0e10cSrcweir     ::basegfx::B2DHomMatrix aTransform;
43*cdf0e10cSrcweir     aTransform.scale( ::basegfx::pruneScaleValue( d * 2.0 * t ),
44*cdf0e10cSrcweir                       ::basegfx::pruneScaleValue( d ) );
45*cdf0e10cSrcweir 
46*cdf0e10cSrcweir     ::basegfx::B2DPolyPolygon res;
47*cdf0e10cSrcweir     for ( sal_Int32 i = m_unitsPerEdge; i--; )
48*cdf0e10cSrcweir     {
49*cdf0e10cSrcweir         ::basegfx::B2DHomMatrix transform( aTransform );
50*cdf0e10cSrcweir         if ((i % 2) == 1) // odd line
51*cdf0e10cSrcweir             transform.translate( -d, 0.0 );
52*cdf0e10cSrcweir         for ( sal_Int32 j = (m_unitsPerEdge / 2) + 1; j--; )
53*cdf0e10cSrcweir         {
54*cdf0e10cSrcweir             ::basegfx::B2DPolyPolygon poly( m_unitRect );
55*cdf0e10cSrcweir             poly.transform( transform );
56*cdf0e10cSrcweir             res.append( poly );
57*cdf0e10cSrcweir             transform.translate( d * 2.0, 0.0 );
58*cdf0e10cSrcweir         }
59*cdf0e10cSrcweir         aTransform.translate( 0.0, d ); // next line
60*cdf0e10cSrcweir     }
61*cdf0e10cSrcweir     return res;
62*cdf0e10cSrcweir }
63*cdf0e10cSrcweir 
64*cdf0e10cSrcweir }
65*cdf0e10cSrcweir }
66