slideshow/source/engine/transitions/fourboxwipe.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.
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   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/polygon/b2dpolypolygon.hxx>
  24 #include <basegfx/numeric/ftools.hxx>
  25 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  26 #include "fourboxwipe.hxx"
  27
  28
  29 namespace slideshow {
  30 namespace internal {
  31
  32 ::basegfx::B2DPolyPolygon FourBoxWipe::operator () ( double t )
  33 {
  34     ::basegfx::B2DHomMatrix aTransform;
  35     const double d = ::basegfx::pruneScaleValue( t / 2.0 );
  36     if (m_cornersOut)
  37     {
  38         aTransform = basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5);
  39         aTransform = basegfx::tools::createScaleTranslateB2DHomMatrix(d, d, -0.25, -0.25)
  40             * aTransform;
  41     }
  42     else
  43     {
  44         aTransform = basegfx::tools::createScaleTranslateB2DHomMatrix(d, d, -0.5, -0.5);
  45     }
  46
  47     // top left:
  48     ::basegfx::B2DPolygon square( m_unitRect );
  49     square.transform( aTransform );
  50     ::basegfx::B2DPolyPolygon res( square );
  51     // bottom left, flip on x-axis:
  52     aTransform.scale( -1.0, 1.0 );
  53     ::basegfx::B2DPolygon square2( m_unitRect );
  54     square2.transform( aTransform );
  55     square2.flip(); // flip direction
  56     res.append( square2 );
  57     // bottom right, flip on y-axis:
  58     aTransform.scale( 1.0, -1.0 );
  59     ::basegfx::B2DPolygon square3( m_unitRect );
  60     square3.transform( aTransform );
  61     res.append( square3 );
  62     // top right, flip on x-axis:
  63     aTransform.scale( -1.0, 1.0 );
  64     ::basegfx::B2DPolygon square4( m_unitRect );
  65     square4.transform( aTransform );
  66     square4.flip(); // flip direction
  67     res.append( square4 );
  68
  69     aTransform = basegfx::tools::createTranslateB2DHomMatrix(0.5, 0.5);
  70     res.transform( aTransform );
  71     return res;
  72 }
  73
  74 }
  75 }
  76
  77 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */