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

#include "../Common.ush"
#include "../DeferredShadingCommon.ush"
#include "../SceneTextureParameters.ush"

Texture2D<float4> SkyLightTexture;
SamplerState SkyLightTextureSampler;

void CompositeSkyLightPS(
	in noperspective float4 OutUVAndScreenPos : TEXCOORD0,
	out float4 OutColor : SV_Target0
)
{
	const float2 UV = OutUVAndScreenPos.xy;
	FGBufferData GBufferData = GetGBufferDataFromSceneTextures(UV);
	float3 Albedo = GBufferData.StoredBaseColor - GBufferData.StoredBaseColor * GBufferData.Metallic;
	float4 SkyLight = SkyLightTexture.Sample(SkyLightTextureSampler, UV);
	// Apply albedo after denoising
	SkyLight.rgb *= Albedo;
	OutColor = SkyLight;
}