Refactored deferred lights code, and skipping SSAA when sample count is 1

CodeWalker.Shaders/LodLightsPS.hlsl

@@ -0,0 +1,38 @@
+#include "LightPS.hlsli"
+
+
+Texture2D DepthTex : register(t0);
+Texture2D DiffuseTex : register(t2);
+Texture2D NormalTex : register(t3);
+Texture2D SpecularTex : register(t4);
+Texture2D IrradianceTex : register(t5);
+
+struct VS_Output
+{
+    float4 Pos : SV_POSITION;
+    float4 Screen : TEXCOORD0;
+    uint IID : SV_INSTANCEID;
+};
+
+float4 main(VS_Output input) : SV_TARGET
+{
+    uint3 ssloc = uint3(input.Pos.xy, 0); //pixel location
+    float depth = DepthTex.Load(ssloc).r;
+    if (depth == 0) discard; //no existing pixel rendered here
+    
+    float4 diffuse = DiffuseTex.Load(ssloc);
+    float4 normal = NormalTex.Load(ssloc);
+    float4 specular = SpecularTex.Load(ssloc);
+    float4 irradiance = IrradianceTex.Load(ssloc);
+    
+    float4 spos = float4(input.Screen.xy / input.Screen.w, depth, 1);
+    float4 cpos = mul(spos, ViewProjInv);
+    float3 camRel = cpos.xyz * (1 / cpos.w);
+    float3 norm = normal.xyz * 2 - 1;
+    
+    float4 lcol = DeferredLODLight(camRel, norm, diffuse, specular, irradiance, input.IID);
+    if (lcol.a <= 0) discard;
+
+    return lcol;
+}
+