/*=============================================================================
	ShadowDepthPixelShader.hlsl: Pixel shader for writing shadow depth.
	Copyright 1998-2007 Epic Games, Inc. All Rights Reserved.
=============================================================================*/

#include "Common.usf"
#include "Material.usf"
#include "VertexFactory.usf"

float InvMaxSubjectDepth;
float DepthBias;

void Main(
	FVertexFactoryInterpolants Interpolants,
	in float4 ShadowPosition : TEXCOORD7,
	OPTIONAL_FacingSign
	out float4 OutColor : COLOR0,
	out float OutDepth : DEPTH
	)
{
	FMaterialParameters MaterialParameters = GetMaterialParameters(Interpolants);
	CalcMaterialParameters(MaterialParameters, FacingSign, float3(0,0,1), float4(0,0,0,1));

	//GetMaterialClipping(MaterialParameters);

	ShadowPosition.z *= InvMaxSubjectDepth;
	ShadowPosition.z += DepthBias;

#if MATERIALBLENDING_MASKED
	ShadowPosition.z = GetMaterialMask(MaterialParameters) > 0 ? ShadowPosition.z : 100.0f;
#endif

	OutDepth = saturate(ShadowPosition.z);
	// RETURN_COLOR not needed unless writing to SceneColor;	
	OutColor = saturate(ShadowPosition.z);
}