PostProcessBloomSetup.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "ScreenPass.h"
 
class FTextureDownsampleChain;
class FEyeAdaptationParameters;
class FLocalExposureParameters;
 
enum class EBloomQuality : uint32
{
    Disabled,
    Q1,
    Q2,
    Q3,
    Q4,
    Q5,
    MAX
};
 
EBloomQuality GetBloomQuality();
 
FScreenPassTexture AddGaussianBloomPasses(FRDGBuilder& GraphBuilder, const FViewInfo& View, const FTextureDownsampleChain* SceneDownsampleChain);
 
struct FBloomSetupInputs
{
    // [Required]: The intermediate scene color being processed.
    FScreenPassTextureSlice SceneColor;
 
    // [Required]: The scene eye adaptation buffer.
    FRDGBufferRef EyeAdaptationBuffer = nullptr;
 
    // [Required]: The bloom threshold to apply. Must be >0.
    float Threshold = 0.0f;
 
    // [Optional] Eye adaptation parameters.
    const FEyeAdaptationParameters* EyeAdaptationParameters = nullptr;
 
    // [Optional] Local exposure parameters.
    const FLocalExposureParameters* LocalExposureParameters = nullptr;
 
    // [Optional] Luminance bilateral grid. If this is null, local exposure is disabled.
    FRDGTextureRef LocalExposureTexture = nullptr;
 
    // [Optional] Blurred luminance texture used to calculate local exposure.
    FRDGTextureRef BlurredLogLuminanceTexture = nullptr;
};
 
FScreenPassTexture AddBloomSetupPass(FRDGBuilder& GraphBuilder, const FViewInfo& View, const FBloomSetupInputs& Inputs);