#if SHADERPASS != SHADERPASS_FORWARD
#error SHADERPASS_is_not_correctly_define
#endif

float4 Frag(PackedVaryings packedInput) : SV_Target
{
    FragInput input = UnpackVaryings(packedInput);
	float3 V = GetWorldSpaceNormalizeViewDir(input.positionWS);
	float3 positionWS = input.positionWS;

	SurfaceData surfaceData;
	BuiltinData builtinData;
	GetSurfaceAndBuiltinData(input, surfaceData, builtinData);

	BSDFData bsdfData = ConvertSurfaceDataToBSDFData(surfaceData);
	Coordinate coord = GetCoordinate(input.unPositionSS.xy, _ScreenSize.zw);
	PreLightData preLightData = GetPreLightData(V, positionWS, coord, bsdfData);

	float3 diffuseLighting;
	float3 specularLighting;
    float3 bakeDiffuseLighting = GetBakedDiffuseLigthing(surfaceData, builtinData, bsdfData, preLightData);
    LightLoop(V, positionWS, coord, preLightData, bsdfData, bakeDiffuseLighting, diffuseLighting, specularLighting);

	return float4(diffuseLighting + specularLighting, builtinData.opacity);
}