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       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 "checkerboardwipe.hxx"
      24                 :            : 
      25                 :            : 
      26                 :            : namespace slideshow {
      27                 :            : namespace internal {
      28                 :            : 
      29                 :          0 : ::basegfx::B2DPolyPolygon CheckerBoardWipe::operator () ( double t )
      30                 :            : {
      31                 :          0 :     const double d = (1.0 / m_unitsPerEdge);
      32                 :          0 :     ::basegfx::B2DHomMatrix aTransform;
      33                 :            :     aTransform.scale( ::basegfx::pruneScaleValue( d * 2.0 * t ),
      34                 :          0 :                       ::basegfx::pruneScaleValue( d ) );
      35                 :            : 
      36                 :          0 :     ::basegfx::B2DPolyPolygon res;
      37                 :          0 :     for ( sal_Int32 i = m_unitsPerEdge; i--; )
      38                 :            :     {
      39                 :          0 :         ::basegfx::B2DHomMatrix transform( aTransform );
      40                 :          0 :         if ((i % 2) == 1) // odd line
      41                 :          0 :             transform.translate( -d, 0.0 );
      42                 :          0 :         for ( sal_Int32 j = (m_unitsPerEdge / 2) + 1; j--; )
      43                 :            :         {
      44                 :          0 :             ::basegfx::B2DPolyPolygon poly( m_unitRect );
      45                 :          0 :             poly.transform( transform );
      46                 :          0 :             res.append( poly );
      47                 :          0 :             transform.translate( d * 2.0, 0.0 );
      48                 :          0 :         }
      49                 :          0 :         aTransform.translate( 0.0, d ); // next line
      50                 :          0 :     }
      51                 :          0 :     return res;
      52                 :            : }
      53                 :            : 
      54                 :            : }
      55                 :            : }
      56                 :            : 
      57                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */