continuouskeytimeactivitybase.cxx

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#include <comphelper/diagnose_ex.hxx>
 
#include "continuouskeytimeactivitybase.hxx"
 
#include <tuple>
 
namespace slideshow::internal
{
        ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase( const ActivityParameters& rParms ) :
            SimpleContinuousActivityBase( rParms ),
            maLerper( std::vector(rParms.maDiscreteTimes) )
        {
            ENSURE_OR_THROW( rParms.maDiscreteTimes.size() > 1,
                              "ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase(): key times vector must have two entries or more" );
            ENSURE_OR_THROW( rParms.maDiscreteTimes.front() == 0.0,
                              "ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase(): key times vector first entry must be zero" );
            ENSURE_OR_THROW( rParms.maDiscreteTimes.back() <= 1.0,
                              "ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase(): key times vector last entry must be less or equal 1" );
        }
 
        void ContinuousKeyTimeActivityBase::simplePerform( double       nSimpleTime,
                                                           sal_uInt32   nRepeatCount ) const
        {
            // calc simple time from global time - sweep through the
            // array multiple times for repeated animations (according to
            // SMIL spec).
            double fAlpha( calcAcceleratedTime( nSimpleTime ) );
            std::ptrdiff_t nIndex;
 
            std::tie(nIndex,fAlpha) = maLerper.lerp(fAlpha);
 
            perform(
                nIndex,
                fAlpha,
                nRepeatCount );
        }
}
 
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