MaterialIRInternal.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "Materials/MaterialIRCommon.h"
#include "MaterialShared.h"
 
#if WITH_EDITOR
 
namespace MIR::Internal {
 
// Returns the material value tpye of the specified UTexture or URuntimeVirtualTexture.
EMaterialValueType GetTextureMaterialValueType(const UObject* TextureObject);
 
//
EMaterialTextureParameterType TextureMaterialValueTypeToParameterType(EMaterialValueType Type);
 
// Returns the value flowing into given expression input (previously set through `BindValueToExpressionInput`).
FValue* FetchValueFromExpressionInput(FMaterialIRModuleBuilderImpl* Builder, const FExpressionInput* Input);
 
// Flows a value into given expression input.
void BindValueToExpressionInput(FMaterialIRModuleBuilderImpl* Builder, const FExpressionInput* Input, FValue* Value);
 
// Flows a value int given expression output.
void BindValueToExpressionOutput(FMaterialIRModuleBuilderImpl* Builder, const FExpressionOutput* Output, FValue* Value);
 
// Computes the hash of a blob of memory. Note: Ptr must be 4 bytes aligned.
uint32 HashBytes(const void* Ptr, uint32 Size);
 
/* Other helper functions */
 
template <typename TKey, typename TValue>
bool Find(const TMap<TKey, TValue>& Map, const TKey& Key, TValue& OutValue)
{
    if (auto ValuePtr = Map.Find(Key)) {
        OutValue = *ValuePtr;
        return true;
    }
    return false;
}
 
} // namespace MIR::Internal
 
#endif // #if WITH_EDITOR