slideshow/source/engine/transitions/iriswipe.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 #include <basegfx/matrix/b2dhommatrix.hxx>
  21 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  22 #include "iriswipe.hxx"
  23
  24 namespace slideshow::internal
  25 {
  26 ::basegfx::B2DPolyPolygon IrisWipe::operator()(double t)
  27 {
  28     const double d = ::basegfx::pruneScaleValue(t);
  29     basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5));
  30     aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(d, d, 0.5, 0.5) * aTransform;
  31
  32     ::basegfx::B2DPolyPolygon res(m_unitRect);
  33     res.transform(aTransform);
  34     return res;
  35 }
  36 }
  37
  38 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */