//#include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/NormalBuffer.hlsl"

#ifndef DECODEDEPTHNORMALS_INCLUDED
#define DECODEDEPTHNORMALS_INCLUDED


inline float DecodeFloatRG(float2 enc) {
    float2 kDecodeDot = float2(1.0, 1 / 255.0);
    return dot(enc, kDecodeDot);
}

inline float3 DecodeViewNormalStereo(float4 enc4) {
    float kScale = 1.7777;
    float3 nn = enc4.xyz * float3(2 * kScale, 2 * kScale, 0) + float3(-kScale, -kScale, 1);
    float g = 2.0 / dot(nn.xyz, nn.xyz);
    float3 n;
    n.xy = g * nn.xy;
    n.z = g - 1;
    return n;
}

inline void DecodeDepthNormal(float4 enc, out float depth, out float3 normal) {
    depth = DecodeFloatRG(enc.zw);
    normal = DecodeViewNormalStereo(enc);
}

#endif