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

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
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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 "iriswipe.hxx"


namespace slideshow {
namespace internal {

::basegfx::B2DPolyPolygon IrisWipe::operator () ( double t )
{
    const double d = ::basegfx::pruneScaleValue(t);
    basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5));
    aTransform = basegfx::tools::createScaleTranslateB2DHomMatrix(d, d, 0.5, 0.5) * aTransform;

    ::basegfx::B2DPolyPolygon res( m_unitRect );
    res.transform( aTransform );
    return res;
}

}
}