MovieSceneSegmentCompiler.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "Containers/ContainerAllocationPolicies.h"
#include "CoreFwd.h"
#include "CoreTypes.h"
#include "Evaluation/MovieSceneSegment.h"
#include "HAL/PlatformCrt.h"
#include "Misc/InlineValue.h"
#include "Misc/Optional.h"
 
class UMovieSceneSection;
struct FFrameNumber;
template <typename ElementType> class TRange;
template <typename T> struct TIsContiguousContainer;
 
struct FMovieSceneSectionData
{
    FMovieSceneSectionData()
        : Section(nullptr), TemplateIndex(INDEX_NONE), Flags(ESectionEvaluationFlags::None)
    {}
 
    FMovieSceneSectionData(const UMovieSceneSection* InSection, int32 InTemplateIndex, ESectionEvaluationFlags InFlags)
        : Section(InSection), TemplateIndex(InTemplateIndex), Flags(InFlags)
    {}
 
    const UMovieSceneSection* Section;
    int32 TemplateIndex;
    ESectionEvaluationFlags Flags;
};
 
struct FSegmentBlendData : TArray<FMovieSceneSectionData, TInlineAllocator<4>>
{
    void AddToSegment(FMovieSceneSegment& Segment) const
    {
        for (const FMovieSceneSectionData& SectionData : *this)
        {
            Segment.Impls.Add(FSectionEvaluationData(SectionData.TemplateIndex, SectionData.Flags));
        }
    }
};
 
//~ trait to re-enable GetData on FSegmentBlendData
template<> struct TIsContiguousContainer<FSegmentBlendData>
{
    enum { Value = true };
};
 
struct FMovieSceneTrackRowSegmentBlender
{
    virtual ~FMovieSceneTrackRowSegmentBlender() {}
 
    virtual void Blend(FSegmentBlendData& BlendData) const
    {
    }
};
 
struct FMovieSceneTrackSegmentBlender
{
    FMovieSceneTrackSegmentBlender()
    {
        bCanFillEmptySpace = false;
        bAllowEmptySegments = false;
    }
 
    virtual ~FMovieSceneTrackSegmentBlender() {}
 
    bool AllowEmptySegments() const
    {
        return bAllowEmptySegments;
    }
 
    bool CanFillEmptySpace() const
    {
        return bCanFillEmptySpace;
    }
 
    virtual TOptional<FMovieSceneSegment> InsertEmptySpace(const TRange<FFrameNumber>& Range, const FMovieSceneSegment* PreviousSegment, const FMovieSceneSegment* NextSegment) const
    {
        return TOptional<FMovieSceneSegment>();
    }
 
    virtual void Blend(FSegmentBlendData& BlendData) const
    {
    }
 
protected:
 
    bool bAllowEmptySegments;
 
    bool bCanFillEmptySpace;
};
 
 
typedef TInlineValue<FMovieSceneTrackRowSegmentBlender, 16> FMovieSceneTrackRowSegmentBlenderPtr;
typedef TInlineValue<FMovieSceneTrackSegmentBlender, 16> FMovieSceneTrackSegmentBlenderPtr;