Branch data     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: */