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27 
28 // MARKER(update_precomp.py): autogen include statement, do not remove
29 #include "precompiled_slideshow.hxx"
30 
31 #include <canvas/debug.hxx>
32 #include <basegfx/numeric/ftools.hxx>
33 #include <basegfx/matrix/b2dhommatrix.hxx>
34 #include <basegfx/matrix/b2dhommatrixtools.hxx>
35 #include "barndoorwipe.hxx"
36 
37 
38 namespace slideshow {
39 namespace internal {
40 
41 ::basegfx::B2DPolyPolygon BarnDoorWipe::operator () ( double t )
42 {
43     if (m_doubled)
44         t /= 2.0;
45 
46     basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5));
47     aTransform.scale( ::basegfx::pruneScaleValue(t), 1.0 );
48     aTransform.translate( 0.5, 0.5 );
49     ::basegfx::B2DPolygon poly( m_unitRect );
50     poly.transform( aTransform );
51     ::basegfx::B2DPolyPolygon res(poly);
52 
53     if (m_doubled) {
54         aTransform = basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5);
55         aTransform.rotate( M_PI_2 );
56         aTransform.translate( 0.5, 0.5 );
57         poly.transform( aTransform );
58         res.append(poly);
59     }
60 
61     return res;
62 }
63 
64 }
65 }
66