slideshow/source/engine/transitions/fourboxwipe.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <basegfx/matrix/b2dhommatrix.hxx>
  22 #include <basegfx/polygon/b2dpolypolygon.hxx>
  23 #include <basegfx/numeric/ftools.hxx>
  24 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  25 #include "fourboxwipe.hxx"
  26
  27
  28 namespace slideshow::internal {
  29
  30 ::basegfx::B2DPolyPolygon FourBoxWipe::operator () ( double t )
  31 {
  32     ::basegfx::B2DHomMatrix aTransform;
  33     const double d = ::basegfx::pruneScaleValue( t / 2.0 );
  34     if (m_cornersOut)
  35     {
  36         aTransform = basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5);
  37         aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(d, d, -0.25, -0.25)
  38             * aTransform;
  39     }
  40     else
  41     {
  42         aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(d, d, -0.5, -0.5);
  43     }
  44
  45     // top left:
  46     ::basegfx::B2DPolygon square( m_unitRect );
  47     square.transform( aTransform );
  48     ::basegfx::B2DPolyPolygon res( square );
  49     // bottom left, flip on x-axis:
  50     aTransform.scale( -1.0, 1.0 );
  51     ::basegfx::B2DPolygon square2( m_unitRect );
  52     square2.transform( aTransform );
  53     square2.flip(); // flip direction
  54     res.append( square2 );
  55     // bottom right, flip on y-axis:
  56     aTransform.scale( 1.0, -1.0 );
  57     ::basegfx::B2DPolygon square3( m_unitRect );
  58     square3.transform( aTransform );
  59     res.append( square3 );
  60     // top right, flip on x-axis:
  61     aTransform.scale( -1.0, 1.0 );
  62     ::basegfx::B2DPolygon square4( m_unitRect );
  63     square4.transform( aTransform );
  64     square4.flip(); // flip direction
  65     res.append( square4 );
  66
  67     aTransform = basegfx::utils::createTranslateB2DHomMatrix(0.5, 0.5);
  68     res.transform( aTransform );
  69     return res;
  70 }
  71
  72 }
  73
  74 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */