xref: /aoo42x/main/slideshow/source/engine/transitions/fanwipe.cxx (revision 70f497fb)

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 *
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_slideshow.hxx"

#include <canvas/debug.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "transitiontools.hxx"
#include "clockwipe.hxx"
#include "fanwipe.hxx"


namespace slideshow {
namespace internal {

::basegfx::B2DPolyPolygon FanWipe::operator () ( double t )
{
    ::basegfx::B2DPolyPolygon res;
    ::basegfx::B2DPolygon poly(
        ClockWipe::calcCenteredClock(
            t / ((m_center && m_single) ? 2.0 : 4.0) ) );

    res.append( poly );
    // flip on y-axis:
    poly.transform(basegfx::tools::createScaleB2DHomMatrix(-1.0, 1.0));
    poly.flip();
    res.append( poly );

    if (m_center)
    {
        res.transform(basegfx::tools::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));

        if (! m_single)
            res.append( flipOnXAxis(res) );
    }
    else
    {
        OSL_ASSERT( ! m_fanIn );
        res.transform(basegfx::tools::createScaleTranslateB2DHomMatrix(0.5, 1.0, 0.5, 1.0));
    }
    return res;
}

}
}