MaterialExpressionCustomOutput.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "Materials/MaterialExpression.h"
#include "RHIDefinitions.h"
#include "Shader/ShaderTypes.h"
#include "MaterialExpressionCustomOutput.generated.h"
 
UCLASS(abstract,collapsecategories, hidecategories = Object, MinimalAPI)
class UMaterialExpressionCustomOutput : public UMaterialExpression
{
    GENERATED_BODY()
 
public:
 
    // Override to enable multiple outputs
    virtual int32 GetNumOutputs() const { return 1; };
    // Override to limit the maximum number of outputs
    virtual int32 GetMaxOutputs() const { return -1; };
    virtual FString GetFunctionName() const PURE_VIRTUAL(UMaterialExpressionCustomOutput::GetFunctionName, return TEXT("GetCustomOutput"););
    virtual FString GetDisplayName() const { return GetFunctionName(); }
 
#if WITH_EDITOR
    // Allow custom outputs to generate their own source code
    virtual bool HasCustomSourceOutput() { return false; }
    virtual bool AllowMultipleCustomOutputs() { return false; }
    virtual bool NeedsCustomOutputDefines() { return true; }
    virtual bool ShouldCompileBeforeAttributes() { return false; }
    virtual bool NeedsPreviousFrameEvaluation() { return false; }
 
    UE_DEPRECATED(5.6, "Use GetShaderFrequency(uint32 OutputIndex) instead")
    virtual EShaderFrequency GetShaderFrequency() { return SF_Pixel; }
    
    virtual EShaderFrequency GetShaderFrequency(uint32 OutputIndex)
    {
        PRAGMA_DISABLE_DEPRECATION_WARNINGS
        return GetShaderFrequency();
        PRAGMA_ENABLE_DEPRECATION_WARNINGS
    }
#endif
};