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#ifndef LIGHTWEIGHT_PASS_META_INCLUDED
#define LIGHTWEIGHT_PASS_META_INCLUDED
#include "LWRP/ShaderLibrary/InputSurface.hlsl"
#include "LWRP/ShaderLibrary/Lighting.hlsl"
CBUFFER_START(UnityMetaPass)
// x = use uv1 as raster position
// y = use uv2 as raster position
bool4 unity_MetaVertexControl;
// x = return albedo
// y = return normal
bool4 unity_MetaFragmentControl;
CBUFFER_END
float unity_OneOverOutputBoost;
float unity_MaxOutputValue;
float unity_UseLinearSpace;
struct MetaInput
{
half3 Albedo;
half3 Emission;
half3 SpecularColor;
};
struct MetaVertexInput
{
float4 vertex : POSITION;
half3 normal : NORMAL;
float2 uv0 : TEXCOORD0;
float2 uv1 : TEXCOORD1;
float2 uv2 : TEXCOORD2;
#ifdef _TANGENT_TO_WORLD
half4 tangent : TANGENT;
#endif
};
struct MetaVertexOuput
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
};
float4 MetaVertexPosition(float4 vertex, float2 uv1, float2 uv2, float4 lightmapST)
{
if (unity_MetaVertexControl.x)
{
vertex.xy = uv1 * lightmapST.xy + lightmapST.zw;
// OpenGL right now needs to actually use incoming vertex position,
// so use it in a very dummy way
vertex.z = vertex.z > 0 ? REAL_MIN : 0.0f;
}
return TransformWorldToHClip(vertex.xyz); // Need to transfer from world to clip compared to legacy
}
half4 MetaFragment(MetaInput IN)
{
half4 res = 0;
if (unity_MetaFragmentControl.x)
{
res = half4(IN.Albedo, 1);
// d3d9 shader compiler doesn't like NaNs and infinity.
unity_OneOverOutputBoost = saturate(unity_OneOverOutputBoost);
// Apply Albedo Boost from LightmapSettings.
res.rgb = clamp(PositivePow(res.rgb, unity_OneOverOutputBoost), 0, unity_MaxOutputValue);
}
if (unity_MetaFragmentControl.y)
{
res = half4(IN.Emission, 1.0);
}
return res;
}
MetaVertexOuput LightweightVertexMeta(MetaVertexInput v)
{
MetaVertexOuput o;
o.pos = MetaVertexPosition(v.vertex, v.uv1.xy, v.uv2.xy, unity_LightmapST);
o.uv = TransformMainTextureCoord(v.uv0);
return o;
}
half4 LightweightFragmentMeta(MetaVertexOuput i) : SV_Target
{
SurfaceData surfaceData;
InitializeStandardLitSurfaceData(i.uv, surfaceData);
BRDFData brdfData;
InitializeBRDFData(surfaceData.albedo, surfaceData.metallic, surfaceData.specular, surfaceData.smoothness, surfaceData.alpha, brdfData);
MetaInput o;
o.Albedo = brdfData.diffuse + brdfData.specular * brdfData.roughness * 0.5;
o.SpecularColor = surfaceData.specular;
o.Emission = surfaceData.emission;
return MetaFragment(o);
}
half4 LightweightFragmentMetaSimple(MetaVertexOuput i) : SV_Target
{
float2 uv = i.uv;
MetaInput o;
o.Albedo = _Color.rgb * SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, uv).rgb;
o.SpecularColor = SpecularGloss(uv, 1.0).xyz;
o.Emission = Emission(uv);
return MetaFragment(o);
}
#endif