Shader "Hidden/Internal-Obscurity" {
Properties {
	_LightTexture0 ("", any) = "" {}
	_ShadowMapTexture ("", any) = "" {}
	_SrcBlend ("", Float) = 1
	_DstBlend ("", Float) = 1
}
SubShader {




Pass 
{
	ZWrite Off
	ZTest Always
	Cull Off
	Blend Off
	//Blend [_SrcBlend] [_DstBlend]
	

CGPROGRAM
#pragma target 5.0
#pragma vertex vert
#pragma fragment frag

#pragma multi_compile USE_FPTL_LIGHTLIST	USE_CLUSTERED_LIGHTLIST

#include "UnityLightingCommon.cginc"

float3 EvalMaterial(UnityLight light, UnityIndirect ind);

// uses the optimized single layered light list for opaques only

#ifdef USE_FPTL_LIGHTLIST
	#define OPAQUES_ONLY
#endif

#include "TiledLightingTemplate.hlsl"


Texture2D _CameraDepthTexture;
Texture2D _CameraGBufferTexture0;
Texture2D _CameraGBufferTexture1;
Texture2D _CameraGBufferTexture2;


struct v2f {
	float4 vertex : SV_POSITION;
	float2 texcoord : TEXCOORD0;
};

v2f vert (float4 vertex : POSITION, float2 texcoord : TEXCOORD0)
{
	v2f o;
	o.vertex = UnityObjectToClipPos(vertex);
	o.texcoord = texcoord.xy;
	return o;
}

struct StandardData
{
	float3 specularColor;
	float3 diffuseColor;
	float3 normalWorld;
	float smoothness;
};

struct LocalDataBRDF
{
	StandardData gbuf;

	// extras
	float oneMinusReflectivity;
	float3 Vworld;
};

static LocalDataBRDF g_localParams;

StandardData UnityStandardDataFromGbuffer(float4 gbuffer0, float4 gbuffer1, float4 gbuffer2)
{
	StandardData data;

	data.normalWorld = normalize(2*gbuffer2.xyz-1);
	data.smoothness = gbuffer1.a;
	data.diffuseColor = gbuffer0.xyz; data.specularColor = gbuffer1.xyz;
	float ao = gbuffer0.a;

	return data;
}


float3 EvalMaterial(UnityLight light, UnityIndirect ind)
{
	StandardData data = g_localParams.gbuf;
	return UNITY_BRDF_PBS(data.diffuseColor, data.specularColor, g_localParams.oneMinusReflectivity, data.smoothness, data.normalWorld, g_localParams.Vworld, light, ind);
}


half4 frag (v2f i) : SV_Target
{
	uint2 pixCoord = ((uint2) i.vertex.xy);

	float zbufDpth = FetchDepth(_CameraDepthTexture, pixCoord.xy).x;
	float linDepth = GetLinearDepth(zbufDpth);

	float3 vP = GetViewPosFromLinDepth(i.vertex.xy, linDepth);
	float3 vPw = mul(g_mViewToWorld, float4(vP, 1)).xyz;
	float3 Vworld = normalize(mul((float3x3) g_mViewToWorld, -vP).xyz);		//unity_CameraToWorld

	float4 gbuffer0 = _CameraGBufferTexture0.Load( uint3(pixCoord.xy, 0) );
	float4 gbuffer1 = _CameraGBufferTexture1.Load( uint3(pixCoord.xy, 0) );
	float4 gbuffer2 = _CameraGBufferTexture2.Load( uint3(pixCoord.xy, 0) );

	StandardData data = UnityStandardDataFromGbuffer(gbuffer0, gbuffer1, gbuffer2);

	g_localParams.gbuf = data;
	g_localParams.oneMinusReflectivity = 1.0 - SpecularStrength(data.specularColor.rgb);
	g_localParams.Vworld = Vworld;

	uint numLightsProcessed = 0;
	float3 c = ExecuteLightListTiled(numLightsProcessed, pixCoord, vP, vPw, Vworld);

	//c = OverlayHeatMap(numLightsProcessed, c);
	return float4(c,1.0);
}

ENDCG 
}

}
Fallback Off
}