iriswipe.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "iriswipe.hxx"
 
namespace slideshow::internal
{
::basegfx::B2DPolyPolygon IrisWipe::operator()(double t)
{
    const double d = ::basegfx::pruneScaleValue(t);
    basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5));
    aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(d, d, 0.5, 0.5) * aTransform;
 
    ::basegfx::B2DPolyPolygon res(m_unitRect);
    res.transform(aTransform);
    return res;
}
}
 
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