MaterialExpressionTextureProperty.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 "Materials/MaterialExpression.h"
#include "MaterialExpressionTextureProperty.generated.h"
 
class UTexture;
 
UENUM()
enum EMaterialExposedTextureProperty : int
{
    /* The texture's size. */
    TMTM_TextureSize UMETA(DisplayName="Texture Size"),
 
    /* The texture's texel size in the UV space (1 / Texture Size) */
    TMTM_TexelSize UMETA(DisplayName="Texel Size"),
    
    TMTM_MAX,
};
 
UCLASS(collapsecategories, hidecategories=Object, MinimalAPI)
class UMaterialExpressionTextureProperty : public UMaterialExpression
{
    GENERATED_UCLASS_BODY()
 
    UPROPERTY(meta = (RequiredInput = "false", ToolTip = "Texture Object to access the property from."))
    FExpressionInput TextureObject;
    
    UPROPERTY(EditAnywhere, Category=UMaterialExpressionTextureProperty, meta=(DisplayName = "Texture Property", ShowAsInputPin = "Advanced"))
    TEnumAsByte<EMaterialExposedTextureProperty> Property = TMTM_TextureSize;
    
    //~ Begin UMaterialExpression Interface
#if WITH_EDITOR
    ENGINE_API virtual void Build(MIR::FEmitter& Emitter) override;
    ENGINE_API virtual int32 Compile(class FMaterialCompiler* Compiler, int32 OutputIndex) override;
    ENGINE_API virtual void GetTexturesForceMaterialRecompile(TArray<UTexture *> &Textures) const override;
    ENGINE_API virtual void GetCaption(TArray<FString>& OutCaptions) const override;
    ENGINE_API virtual EMaterialValueType GetInputValueType(int32 InputIndex) override;
    ENGINE_API virtual bool MatchesSearchQuery(const TCHAR* SearchQuery) override;
 
#endif //WITH_EDITOR
    //~ End UMaterialExpression Interface
};