MaterialExpressionShadingPathSwitch.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "MaterialExpressionIO.h"
#include "MaterialValueType.h"
#include "Materials/MaterialExpression.h"
#include "RHIDefinitions.h"
#include "MaterialExpressionShadingPathSwitch.generated.h"
 
enum EShaderPlatform : uint16;
 
UCLASS(collapsecategories, hidecategories=Object, MinimalAPI)
class UMaterialExpressionShadingPathSwitch : public UMaterialExpression
{
    GENERATED_BODY()
 
public:
 
    UPROPERTY()
    FExpressionInput Default;
 
    UPROPERTY()
    FExpressionInput Inputs[ERHIShadingPath::Num];
 
    //~ Begin UMaterialExpression Interface
#if WITH_EDITOR
    virtual void Build(MIR::FEmitter& Emitter) override;
    virtual int32 Compile(class FMaterialCompiler* Compiler, int32 OutputIndex) override;
    virtual void GetCaption(TArray<FString>& OutCaptions) const override;
 
    virtual FName GetInputName(int32 InputIndex) const override;
    virtual bool IsInputConnectionRequired(int32 InputIndex) const override;
    virtual bool IsResultMaterialAttributes(int32 OutputIndex) override;
    virtual EMaterialValueType GetInputValueType(int32 InputIndex) override {return MCT_Unknown;}
    virtual EMaterialValueType GetOutputValueType(int32 InputIndex) override {return MCT_Unknown;}
 
    virtual bool IsResultSubstrateMaterial(int32 OutputIndex) override;
    virtual void GatherSubstrateMaterialInfo(FSubstrateMaterialInfo& SubstrateMaterialInfo, int32 OutputIndex) override;
    virtual FSubstrateOperator* SubstrateGenerateMaterialTopologyTree(class FMaterialCompiler* Compiler, class UMaterialExpression* Parent, int32 OutputIndex) override;
#endif // WITH_EDITOR
    //~ End UMaterialExpression Interface
 
#if WITH_EDITOR
protected:
    ERHIShadingPath::Type GetShadingPathToCompile(EShaderPlatform ShaderPlatform, ERHIFeatureLevel::Type FeatureLevel);
    FExpressionInput* GetEffectiveInput(class FMaterialCompiler* Compiler);
#endif
};