slideshow/source/engine/activities/continuouskeytimeactivitybase.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
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  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 <comphelper/diagnose_ex.hxx>
  22
  23 #include "continuouskeytimeactivitybase.hxx"
  24
  25 #include <tuple>
  26
  27 namespace slideshow::internal
  28 {
  29         ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase( const ActivityParameters& rParms ) :
  30             SimpleContinuousActivityBase( rParms ),
  31             maLerper( std::vector(rParms.maDiscreteTimes) )
  32         {
  33             ENSURE_OR_THROW( rParms.maDiscreteTimes.size() > 1,
  34                               "ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase(): key times vector must have two entries or more" );
  35             ENSURE_OR_THROW( rParms.maDiscreteTimes.front() == 0.0,
  36                               "ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase(): key times vector first entry must be zero" );
  37             ENSURE_OR_THROW( rParms.maDiscreteTimes.back() <= 1.0,
  38                               "ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase(): key times vector last entry must be less or equal 1" );
  39         }
  40
  41         void ContinuousKeyTimeActivityBase::simplePerform( double       nSimpleTime,
  42                                                            sal_uInt32   nRepeatCount ) const
  43         {
  44             // calc simple time from global time - sweep through the
  45             // array multiple times for repeated animations (according to
  46             // SMIL spec).
  47             double fAlpha( calcAcceleratedTime( nSimpleTime ) );
  48             std::ptrdiff_t nIndex;
  49
  50             std::tie(nIndex,fAlpha) = maLerper.lerp(fAlpha);
  51
  52             perform(
  53                 nIndex,
  54                 fAlpha,
  55                 nRepeatCount );
  56         }
  57 }
  58
  59 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */