Line data    Source code

       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 <canvas/debug.hxx>
      22             : #include <basegfx/matrix/b2dhommatrix.hxx>
      23             : #include <basegfx/point/b2dpoint.hxx>
      24             : #include "doublediamondwipe.hxx"
      25             : 
      26             : 
      27             : namespace slideshow {
      28             : namespace internal {
      29             : 
      30           0 : ::basegfx::B2DPolyPolygon DoubleDiamondWipe::operator () ( double t )
      31             : {
      32             :     // outer:
      33           0 :     const double a = ::basegfx::pruneScaleValue( 0.25 + (t * 0.75) );
      34           0 :     ::basegfx::B2DPolygon poly;
      35           0 :     poly.append( ::basegfx::B2DPoint( 0.5 + a, 0.5 ) );
      36           0 :     poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - a ) );
      37           0 :     poly.append( ::basegfx::B2DPoint( 0.5 - a, 0.5 ) );
      38           0 :     poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + a ) );
      39           0 :     poly.setClosed(true);
      40           0 :     ::basegfx::B2DPolyPolygon res(poly);
      41             : 
      42             :     // inner (reverse order to clip):
      43           0 :     const double b = ::basegfx::pruneScaleValue( (1.0 - t) * 0.25 );
      44           0 :     poly.clear();
      45           0 :     poly.append( ::basegfx::B2DPoint( 0.5 + b, 0.5 ) );
      46           0 :     poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + b ) );
      47           0 :     poly.append( ::basegfx::B2DPoint( 0.5 - b, 0.5 ) );
      48           0 :     poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - b ) );
      49           0 :     poly.setClosed(true);
      50           0 :     res.append(poly);
      51             : 
      52           0 :     return res;
      53             : }
      54             : 
      55             : }
      56             : }
      57             : 
      58             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */