slideshow/source/engine/transitions/sweepwipe.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/matrix/b2dhommatrixtools.hxx>
  23 #include "clockwipe.hxx"
  24 #include "sweepwipe.hxx"
  25 #include "transitiontools.hxx"
  26
  27
  28 namespace slideshow::internal {
  29
  30 ::basegfx::B2DPolyPolygon SweepWipe::operator () ( double t )
  31 {
  32     t /= 2.0;
  33     if (! m_center)
  34         t /= 2.0;
  35     if (!m_single && !m_oppositeVertical)
  36         t /= 2.0;
  37
  38     ::basegfx::B2DPolygon poly( ClockWipe::calcCenteredClock( 0.25 + t ) );
  39     ::basegfx::B2DHomMatrix aTransform;
  40
  41     if (m_center)
  42     {
  43         aTransform = basegfx::utils::createTranslateB2DHomMatrix(0.5, 0.0);
  44         poly.transform( aTransform );
  45     }
  46     ::basegfx::B2DPolyPolygon res(poly);
  47
  48     if (! m_single)
  49     {
  50         if (m_oppositeVertical)
  51         {
  52             aTransform = basegfx::utils::createScaleB2DHomMatrix(1.0, -1.0);
  53             aTransform.translate( 0.0, 1.0 );
  54             poly.transform( aTransform );
  55             poly.flip();
  56         }
  57         else
  58         {
  59             aTransform = basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5);
  60             aTransform.rotate( M_PI );
  61             aTransform.translate( 0.5, 0.5 );
  62             poly.transform( aTransform );
  63         }
  64         res.append(poly);
  65     }
  66
  67     if (m_flipOnYAxis)
  68        return flipOnYAxis(res);
  69     return res;
  70 }
  71
  72 }
  73
  74 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */