SPostBufferUpdate.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "Input/Reply.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Widgets/SLeafWidget.h"
#include "Styling/SlateTypes.h"
 
class FPaintArgs;
class FSlateWindowElementList;
class FSlateRHIPostBufferProcessorProxy;
 
class FPostBufferUpdater;
 
class FSlatePostProcessorUpdaterProxy : public TSharedFromThis<FSlatePostProcessorUpdaterProxy>
{
public:
 
public:
    
    virtual ~FSlatePostProcessorUpdaterProxy ()
    {
    }
 
    virtual void UpdateProcessor_RenderThread(TSharedPtr<FSlateRHIPostBufferProcessorProxy>) const = 0;
};
 
class SPostBufferUpdate
    : public SLeafWidget
{
    SLATE_DECLARE_WIDGET_API(SPostBufferUpdate, SLeafWidget, UMG_API)
 
public:
    SLATE_BEGIN_ARGS( SPostBufferUpdate )
        : _bUsePaintGeometry(false)
        { }
 
        SLATE_ARGUMENT(bool, bUsePaintGeometry)
    SLATE_END_ARGS()
 
    
    UMG_API SPostBufferUpdate();
 
    UMG_API void Construct( const FArguments& InArgs );
 
public:
    UMG_API void SetUsePaintGeometry(bool bInUsePaintGeometry);
 
    UMG_API void SetBuffersToUpdate(const TArrayView<ESlatePostRT> InBuffersToUpdate);
 
    UMG_API void SetProcessorUpdaters(TMap<ESlatePostRT, TSharedPtr<FSlatePostProcessorUpdaterProxy>> InProcessorUpdaters);
 
    UMG_API const TArrayView<const ESlatePostRT> GetBuffersToUpdate() const;
 
    UMG_API void ReleasePostBufferUpdater();
 
public:
 
    //~Begin Widget Interface
    UMG_API virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override;
    //~End Widget Interface
 
protected:
 
    //~Begin Widget Interface
    UMG_API virtual FVector2D ComputeDesiredSize(float LayoutScaleMultiplier) const override;
    //~End Widget Interface
 
private:
 
    bool bUsePaintGeometry;
 
    TArray<ESlatePostRT> BuffersToUpdate;
 
    TSharedPtr<FPostBufferUpdater> PostBufferUpdater;
};