slideshow/source/engine/transitions/barndoorwipe.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/numeric/ftools.hxx>
  22 #include <basegfx/matrix/b2dhommatrix.hxx>
  23 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  24 #include "barndoorwipe.hxx"
  25
  26
  27 namespace slideshow::internal {
  28
  29 ::basegfx::B2DPolyPolygon BarnDoorWipe::operator () ( double t )
  30 {
  31     if (m_doubled)
  32         t /= 2.0;
  33
  34     basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5));
  35     aTransform.scale( ::basegfx::pruneScaleValue(t), 1.0 );
  36     aTransform.translate( 0.5, 0.5 );
  37     ::basegfx::B2DPolygon poly( m_unitRect );
  38     poly.transform( aTransform );
  39     ::basegfx::B2DPolyPolygon res(poly);
  40
  41     if (m_doubled) {
  42         aTransform = basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5);
  43         aTransform.rotate( M_PI_2 );
  44         aTransform.translate( 0.5, 0.5 );
  45         poly.transform( aTransform );
  46         res.append(poly);
  47     }
  48
  49     return res;
  50 }
  51
  52 }
  53
  54 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */