xref: /aoo41x/main/slideshow/source/engine/transitions/fourboxwipe.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,
 * software distributed under the License is distributed on an
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 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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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/polygon/b2dpolypolygon.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "fourboxwipe.hxx"


namespace slideshow {
namespace internal {

::basegfx::B2DPolyPolygon FourBoxWipe::operator () ( double t )
{
    ::basegfx::B2DHomMatrix aTransform;
    const double d = ::basegfx::pruneScaleValue( t / 2.0 );
    if (m_cornersOut)
    {
        aTransform = basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5);
        aTransform = basegfx::tools::createScaleTranslateB2DHomMatrix(d, d, -0.25, -0.25)
            * aTransform;
    }
    else
    {
        aTransform = basegfx::tools::createScaleTranslateB2DHomMatrix(d, d, -0.5, -0.5);
    }

    // top left:
    ::basegfx::B2DPolygon square( m_unitRect );
    square.transform( aTransform );
    ::basegfx::B2DPolyPolygon res( square );
    // bottom left, flip on x-axis:
    aTransform.scale( -1.0, 1.0 );
    ::basegfx::B2DPolygon square2( m_unitRect );
    square2.transform( aTransform );
    square2.flip(); // flip direction
    res.append( square2 );
    // bottom right, flip on y-axis:
    aTransform.scale( 1.0, -1.0 );
    ::basegfx::B2DPolygon square3( m_unitRect );
    square3.transform( aTransform );
    res.append( square3 );
    // top right, flip on x-axis:
    aTransform.scale( -1.0, 1.0 );
    ::basegfx::B2DPolygon square4( m_unitRect );
    square4.transform( aTransform );
    square4.flip(); // flip direction
    res.append( square4 );

    aTransform = basegfx::tools::createTranslateB2DHomMatrix(0.5, 0.5);
    res.transform( aTransform );
    return res;
}

}
}