PostProcessVisualizeComplexity.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "ScreenPass.h"
#include "DebugViewModeHelpers.h"
#include "OverridePassSequence.h"
 
const uint32 MaxNumShaderComplexityColors = 11;
const float NormalizedQuadComplexityValue = 1.f / 16.f;
 
// Gets the maximum shader complexity count from the ini settings.
float GetMaxShaderComplexityCount(ERHIFeatureLevel::Type InFeatureType);
 
struct FVisualizeComplexityInputs
{
    enum class EColorSamplingMethod : uint32
    {
        Ramp,
        Linear,
        Stair
    };
 
    // [Optional] Render to the specified output. If invalid, a new texture is created and returned.
    FScreenPassRenderTarget OverrideOutput;
 
    // [Required] The input scene color and view rect.
    FScreenPassTexture SceneColor;
 
    // [Required] The table of colors used for visualization, ordered by least to most complex.
    TArrayView<const FLinearColor> Colors;
 
    // The method used to derive a color from the sampled complexity value.
    EColorSamplingMethod ColorSamplingMethod = EColorSamplingMethod::Ramp;
 
    // A scale applied to the sampled scene complexity value prior to colorizing.
    float ComplexityScale = 1.0f;
 
    // Renders the complexity legend overlay.
    bool bDrawLegend = false;
};
 
FScreenPassTexture AddVisualizeComplexityPass(FRDGBuilder& GraphBuilder, const FViewInfo& View, const FVisualizeComplexityInputs& Inputs);