#include "DecalsCommon.cginc"
#include "../SDF.cginc"

void surf(DecalSurfaceInput IN, inout SurfaceOutput o) {
    float4 color = tex2D(_Decal, IN.uv_decal);
    o.Albedo = color.rgb;
    o.Specular = 0.4;
    o.Gloss = _Shininess;

    #ifdef DECAL_BASE_NORMAL
        float3 normal = IN.normal;
        float wearFactor = 1 - normal.z;
        o.Alpha *= saturate(1 + _EdgeWearOffset - saturate(_EdgeWearStrength * wearFactor));
    #endif

    #ifdef DECAL_BUMPMAP
        o.Normal = UnpackNormalDXT5nm(tex2D(_BumpMap, IN.uv_bumpmap));
    #endif

    #ifdef DECAL_SPECMAP
        float4 specular = tex2D(_SpecMap, IN.uv_specmap);
        o.Specular = specular;
    #endif

    #ifdef DECAL_EMISSIVE
        o.Emission += tex2D(_Emissive, IN.uv_emissive).rgb * _Emissive_Color.rgb * _Emissive_Color.a;
    #endif

    float dist = BoundsDist(IN.uv, IN.vertex_normal, _DecalNormal);
    #ifdef DECAL_SDF_ALPHA
        float decalDist = _Cutoff - color.a;
        o.Alpha *= SDFAA(max(decalDist, dist));
    #else
        o.Alpha *= SDFAA(dist);
        o.Alpha *= color.a;
    #endif
}