slideshow/source/engine/transitions/fourboxwipe.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 <basegfx/polygon/b2dpolypolygon.hxx>
  37 #include <basegfx/numeric/ftools.hxx>
  38 #include "fourboxwipe.hxx"
  39
  40
  41 namespace slideshow {
  42 namespace internal {
  43
  44 ::basegfx::B2DPolyPolygon FourBoxWipe::operator () ( double t )
  45 {
  46     ::basegfx::B2DHomMatrix aTransform;
  47     const double d = ::basegfx::pruneScaleValue( t / 2.0 );
  48     if (m_cornersOut) {
  49         aTransform.translate( -0.5, -0.5 );
  50         aTransform.scale( d, d );
  51         aTransform.translate( -0.25, -0.25 );
  52     } else {
  53         aTransform.scale( d, d );
  54         aTransform.translate( -0.5, -0.5 );
  55     }
  56
  57     // top left:
  58     ::basegfx::B2DPolygon square( m_unitRect );
  59     square.transform( aTransform );
  60     ::basegfx::B2DPolyPolygon res( square );
  61     // bottom left, flip on x-axis:
  62     aTransform.scale( -1.0, 1.0 );
  63     ::basegfx::B2DPolygon square2( m_unitRect );
  64     square2.transform( aTransform );
  65     square2.flip(); // flip direction
  66     res.append( square2 );
  67     // bottom right, flip on y-axis:
  68     aTransform.scale( 1.0, -1.0 );
  69     ::basegfx::B2DPolygon square3( m_unitRect );
  70     square3.transform( aTransform );
  71     res.append( square3 );
  72     // top right, flip on x-axis:
  73     aTransform.scale( -1.0, 1.0 );
  74     ::basegfx::B2DPolygon square4( m_unitRect );
  75     square4.transform( aTransform );
  76     square4.flip(); // flip direction
  77     res.append( square4 );
  78
  79     aTransform.identity();
  80     aTransform.translate( 0.5, 0.5 );
  81     res.transform( aTransform );
  82     return res;
  83 }
  84
  85 }
  86 }