// Upgrade NOTE: upgraded instancing buffer 'InstanceProperties' to new syntax.

#if !defined(MY_SHADOWS_INCLUDED)
#define MY_SHADOWS_INCLUDED

#include "UnityCG.cginc"

#if defined(_RENDERING_FADE) || defined(_RENDERING_TRANSPARENT)
	#if defined(_SEMITRANSPARENT_SHADOWS)
		#define SHADOWS_SEMITRANSPARENT 1
	#else
		#define _RENDERING_CUTOUT
	#endif
#endif

#if SHADOWS_SEMITRANSPARENT || defined(_RENDERING_CUTOUT)
	#if !defined(_SMOOTHNESS_ALBEDO)
		#define SHADOWS_NEED_UV 1
	#endif
#endif

#if defined(_PARALLAX_MAP) && defined(VERTEX_DISPLACEMENT_INSTEAD_OF_PARALLAX)
	#undef _PARALLAX_MAP
	#define VERTEX_DISPLACEMENT 1
	#if !defined(SHADOWS_NEED_UV)
		#define SHADOWS_NEED_UV 1
	#endif
#endif

UNITY_INSTANCING_BUFFER_START(InstanceProperties)
	UNITY_DEFINE_INSTANCED_PROP(float4, _Color)
#define _Color_arr InstanceProperties
UNITY_INSTANCING_BUFFER_END(InstanceProperties)

sampler2D _MainTex;
float4 _MainTex_ST;
float _Cutoff;

sampler2D _DisplacementMap;
float _DisplacementStrength;

float _FresnelClip;
float _FresnelClipPower;
float _FresnelClipOffset;
float _AlphaClip;
float _AlphaRange;
float _AlphaRangeFeather;
float _AlphaRangeCenter;

sampler3D _DitherMaskLOD;

struct VertexData {
	UNITY_VERTEX_INPUT_INSTANCE_ID
	float4 vertex : POSITION;
	float3 normal : NORMAL;
	float2 uv : TEXCOORD0;
};

struct InterpolatorsVertex {
	UNITY_VERTEX_INPUT_INSTANCE_ID
	float4 position : SV_POSITION;
	#if SHADOWS_NEED_UV
		float2 uv : TEXCOORD0;
	#endif
	#if defined(SHADOWS_CUBE)
		float3 lightVec : TEXCOORD1;
	#endif
};

struct Interpolators {
	UNITY_VERTEX_INPUT_INSTANCE_ID
	#if SHADOWS_SEMITRANSPARENT || defined(LOD_FADE_CROSSFADE)
		UNITY_VPOS_TYPE vpos : VPOS;
	#else
		float4 position : SV_POSITION;
	#endif

	#if SHADOWS_NEED_UV
		float2 uv : TEXCOORD0;
	#endif
	#if defined(SHADOWS_CUBE)
		float3 lightVec : TEXCOORD1;
	#endif
};

float GetAlpha (Interpolators i) {
	float alpha = UNITY_ACCESS_INSTANCED_PROP(_Color_arr, _Color).a;
	#if SHADOWS_NEED_UV
		alpha *= tex2D(_MainTex, i.uv.xy).a;
	#endif
	return alpha;
}

#define MyVertexProgram MyShadowVertexProgram

InterpolatorsVertex MyShadowVertexProgram (VertexData v) {
	InterpolatorsVertex i;
	UNITY_SETUP_INSTANCE_ID(v);
	UNITY_TRANSFER_INSTANCE_ID(v, i);

	#if SHADOWS_NEED_UV
		i.uv = TRANSFORM_TEX(v.uv, _MainTex);
	#endif

    float displacement = tex2Dlod(_DisplacementMap, float4(v.uv.xy, 0, 0)).r * _DisplacementStrength;
    v.normal = normalize(v.normal);
    v.vertex.xyz += v.normal * displacement;

	#if defined(SHADOWS_CUBE)
		i.position = UnityObjectToClipPos(v.vertex);
		i.lightVec =
			mul(unity_ObjectToWorld, v.vertex).xyz - _LightPositionRange.xyz;
	#else
		i.position = UnityClipSpaceShadowCasterPos(v.vertex.xyz, v.normal);
		i.position = UnityApplyLinearShadowBias(i.position);
	#endif
	return i;
}

float4 MyShadowFragmentProgram (Interpolators i) : SV_TARGET {
	UNITY_SETUP_INSTANCE_ID(i);
	#if defined(LOD_FADE_CROSSFADE)
		UnityApplyDitherCrossFade(i.vpos);
	#endif

	float alpha = GetAlpha(i);
	#if defined(_RENDERING_CUTOUT)
		clip(alpha - _Cutoff);
	#endif

	#if SHADOWS_SEMITRANSPARENT
		float dither =
			tex3D(_DitherMaskLOD, float3(i.vpos.xy * 0.25, alpha * 0.9375)).a;
		clip(dither - 0.01);
	#endif
	
	#if defined(SHADOWS_CUBE)
		float depth = length(i.lightVec) + unity_LightShadowBias.x;
		depth *= _LightPositionRange.w;
		return UnityEncodeCubeShadowDepth(depth);
	#else
		return 0;
	#endif
}

#endif