UnrealEngineUWP/Engine/Source/Programs/UnrealLightmass/Private/ImportExport/Material.cpp

// Copyright Epic Games, Inc. All Rights Reserved.

#include "Material.h"
#include "Importer.h"

namespace Lightmass
{
	//----------------------------------------------------------------------------
	//	Material base class
	//----------------------------------------------------------------------------
	void FBaseMaterial::Import( class FLightmassImporter& Importer )
	{
		verify(Importer.ImportData((FBaseMaterialData*)this));
	}

	//----------------------------------------------------------------------------
	//	Material class
	//----------------------------------------------------------------------------
	void FMaterial::Import( class FLightmassImporter& Importer )
	{
		// import super class
		FBaseMaterial::Import(Importer);

		// import the shared data structure
		verify(Importer.ImportData((FMaterialData*)this));

		// import the actual material samples...
		int32 ReadSize;

		// Emissive
		ReadSize = EmissiveSize * EmissiveSize;
		checkf(ReadSize > 0, TEXT("Failed to import emissive data!"));
		MaterialEmissive.Init(TF_ARGB16F, EmissiveSize, EmissiveSize);
		verify(Importer.Read(MaterialEmissive.GetData(), ReadSize * sizeof(FFloat16Color)));

		// Diffuse
		ReadSize = DiffuseSize * DiffuseSize;
		if (ReadSize > 0)
		{
			MaterialDiffuse.Init(TF_ARGB16F, DiffuseSize, DiffuseSize);
			verify(Importer.Read(MaterialDiffuse.GetData(), ReadSize * sizeof(FFloat16Color)));
		}
		else
		{
			// Opaque materials should always import diffuse
			check(BlendMode != BLEND_Opaque && BlendMode != BLEND_Masked);
		}

		// Transmission
		ReadSize = TransmissionSize * TransmissionSize;
		if (ReadSize > 0)
		{
			MaterialTransmission.Init(TF_ARGB16F, TransmissionSize, TransmissionSize);
			verify(Importer.Read(MaterialTransmission.GetData(), ReadSize * sizeof(FFloat16Color)));
		}
		else
		{
			// Materials with a translucent blend mode should always import transmission
			check(BlendMode != BLEND_Translucent && BlendMode != BLEND_Additive && BlendMode != BLEND_Modulate && BlendMode != BLEND_AlphaComposite && BlendMode != BLEND_AlphaHoldout);
		}

		// Normal
		ReadSize = NormalSize * NormalSize;
		if( ReadSize > 0 )
		{
			MaterialNormal.Init(TF_ARGB16F, NormalSize, NormalSize);
			verify(Importer.Read(MaterialNormal.GetData(), ReadSize * sizeof(FFloat16Color)));
		}
	}

}	// namespace Lightmass