CodeWalker/CodeWalker.Shaders/LodLightsPS.hlsl

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HLSL
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#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;
}