xref: /aoo41x/main/slideshow/source/engine/activities/continuouskeytimeactivitybase.cxx (revision 70f497fb)

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_slideshow.hxx"

// must be first
#include <canvas/debug.hxx>
#include <tools/diagnose_ex.h>
#include <canvas/verbosetrace.hxx>

#include <continuouskeytimeactivitybase.hxx>

#include <boost/tuple/tuple.hpp>
#include <algorithm>
#include <iterator>


namespace slideshow
{
    namespace internal
    {
        ContinuousKeyTimeActivityBase::ContinuousKeyTimeActivityBase( const ActivityParameters& rParms ) :
            SimpleContinuousActivityBase( rParms ),
            maLerper( 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;

            boost::tuples::tie(nIndex,fAlpha) = maLerper.lerp(fAlpha);

            perform(
                nIndex,
                fAlpha,
                nRepeatCount );
        }
    }
}