PostProcessFFTBloom.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Math/MathFwd.h"
#include "ScreenPass.h"
 
class FEyeAdaptationParameters;
class FLocalExposureParameters;
class FRDGBuffer;
class FRDGBuilder;
class FRDGTexture;
class FViewInfo;
 
using FRDGBufferRef = FRDGBuffer*;
using FRDGTextureRef = FRDGTexture*;
 
// Returns whether FFT bloom is enabled for the view.
bool IsFFTBloomEnabled(const FViewInfo& View);
 
float GetFFTBloomResolutionFraction(const FIntPoint& ViewSize);
 
struct FFFTBloomOutput
{
    FScreenPassTexture BloomTexture;
    FRDGBufferRef SceneColorApplyParameters = nullptr;
};
 
FFFTBloomOutput AddFFTBloomPass(
    FRDGBuilder& GraphBuilder,
    const FViewInfo& View,
    const FScreenPassTextureSlice& InputSceneColor,
    float InputResolutionFraction,
    const FEyeAdaptationParameters& EyeAdaptationParameters,
    FRDGBufferRef EyeAdaptationBuffer,
    const FLocalExposureParameters& LocalExposureParameters,
    FRDGTextureRef LocalExposureTexture,
    FRDGTextureRef BlurredLogLuminanceTexture);