// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Hidden/SSAO Pro - High Precision Depth Map"
{
	Properties
	{
		_MainTex ("", 2D) = "white" {}
		_Cutoff ("", Float) = 0.5
		_Color ("", Color) = (1,1,1,1)
	}
	Category
	{
		Fog { Mode Off }

		SubShader
		{
			Tags { "RenderType"="Opaque" }

			Pass
			{
				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"

				struct v2f
				{
				    float4 pos : SV_POSITION;
				    float2 depth : TEXCOORD0;
				};

				v2f vert(appdata_base v)
				{
				    v2f o;
				    o.pos = UnityObjectToClipPos(v.vertex);
					o.depth = o.pos.zw;
				    return o;
				}

				float4 frag(v2f i) : COLOR
				{
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="TransparentCutout" }

			Pass
			{
				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"

				struct v2f
				{
				    float4 pos : SV_POSITION;
					float2 uv : TEXCOORD0;
				    float2 depth : TEXCOORD1;
					float3 norm : TEXCOORD2;
				};

				uniform float4 _MainTex_ST;

				v2f vert(appdata_base v)
				{
				    v2f o;
				    o.pos = UnityObjectToClipPos(v.vertex);
					o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
					o.depth = o.pos.zw;
				    return o;
				}

				uniform sampler2D _MainTex;
				uniform float _Cutoff;
				uniform float4 _Color;

				float4 frag(v2f i) : COLOR
				{
					float4 texcol = tex2D(_MainTex, i.uv);
					clip(texcol.a * _Color.a - _Cutoff);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="TreeBark" }

			Pass
			{
				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#pragma glsl_no_auto_normalization
				#include "UnityCG.cginc"
				#include "Lighting.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
				    float4 pos : SV_POSITION;
					float2 depth : TEXCOORD0;
				};

				v2f vert(appdata_full v)
				{
				    v2f o;
				    TreeVertBark(v);
					o.pos = UnityObjectToClipPos(v.vertex);
					o.depth = o.pos.zw;
				    return o;
				}

				float4 frag(v2f i) : COLOR
				{
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="TreeLeaf" }

			Pass
			{
				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#pragma glsl_no_auto_normalization
				#include "UnityCG.cginc"
				#include "Lighting.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
					float4 pos : SV_POSITION;
					float2 uv : TEXCOORD0;
					float2 depth : TEXCOORD1;
					float3 norm : TEXCOORD2;
				};

				v2f vert(appdata_full v)
				{
				    v2f o;
				    TreeVertLeaf(v);
					o.pos = UnityObjectToClipPos(v.vertex);
					o.uv = v.texcoord.xy;
					o.depth = o.pos.zw;
				    return o;
				}

				uniform sampler2D _MainTex;
				uniform float _Cutoff;

				float4 frag(v2f i) : COLOR
				{
					half alpha = tex2D(_MainTex, i.uv).a;
					clip(alpha - _Cutoff);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="TreeOpaque" }

			Pass
			{
				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
					float4 pos : SV_POSITION;
					float2 depth : TEXCOORD0;
				};

				struct appdata
				{
				    float4 vertex : POSITION;
				    float4 color : COLOR;
				};

				v2f vert(appdata v)
				{
					v2f o;
					TerrainAnimateTree(v.vertex, v.color.w);
					o.pos = UnityObjectToClipPos(v.vertex);
					o.depth = o.pos.zw;
					return o;
				}

				float4 frag(v2f i) : COLOR
				{
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		} 

		SubShader
		{
			Tags { "RenderType"="TreeTransparentCutout" }

			Pass
			{
				Cull Back

				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
					float4 pos : SV_POSITION;
					float2 uv : TEXCOORD0;
					float2 depth : TEXCOORD1;
				};

				struct appdata
				{
				    float4 vertex : POSITION;
				    float4 color : COLOR;
				    float4 texcoord : TEXCOORD0;
				};

				v2f vert(appdata v)
				{
					v2f o;
					TerrainAnimateTree(v.vertex, v.color.w);
					o.pos = UnityObjectToClipPos(v.vertex);
					o.uv = v.texcoord.xy;
					o.depth = o.pos.zw;
					return o;
				}

				uniform sampler2D _MainTex;
				uniform float _Cutoff;

				float4 frag(v2f i) : COLOR
				{
					half alpha = tex2D(_MainTex, i.uv).a;
					clip(alpha - _Cutoff);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}

			Pass
			{
				Cull Front

				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
					float4 pos : SV_POSITION;
					float2 uv : TEXCOORD0;
					float2 depth : TEXCOORD1;
				};

				struct appdata
				{
				    float4 vertex : POSITION;
				    float4 color : COLOR;
				    float4 texcoord : TEXCOORD0;
				};

				v2f vert(appdata v)
				{
					v2f o;
					TerrainAnimateTree(v.vertex, v.color.w);
					o.pos = UnityObjectToClipPos(v.vertex);
					o.uv = v.texcoord.xy;
					o.depth = o.pos.zw;
					return o;
				}

				uniform sampler2D _MainTex;
				uniform float _Cutoff;

				float4 frag(v2f i) : COLOR
				{
					half alpha = tex2D(_MainTex, i.uv).a;
					clip(alpha - _Cutoff);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="TreeBillboard" }

			Pass
			{
				Cull Off

				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
					float4 pos : SV_POSITION;
					float2 uv : TEXCOORD0;
					float2 depth : TEXCOORD1;
				};

				v2f vert(appdata_tree_billboard v)
				{
					v2f o;
					TerrainBillboardTree(v.vertex, v.texcoord1.xy, v.texcoord.y);
					o.pos = UnityObjectToClipPos(v.vertex);
					o.uv.x = v.texcoord.x;
					o.uv.y = v.texcoord.y > 0;
					o.depth = o.pos.zw;
					return o;
				}

				uniform sampler2D _MainTex;

				float4 frag(v2f i) : COLOR
				{
					float4 texcol = tex2D(_MainTex, i.uv);
					clip(texcol.a - 0.001);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="GrassBillboard" }

			Pass
			{
				Cull Off

				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"
				#include "TerrainEngine.cginc"
				#pragma glsl_no_auto_normalization

				struct v2f
				{
					float4 pos : SV_POSITION;
					float4 color : COLOR;
					float2 uv : TEXCOORD0;
					float2 depth : TEXCOORD1;
				};

				v2f vert(appdata_full v)
				{
					v2f o;
					WavingGrassBillboardVert(v);
					o.color = v.color;
					o.pos = UnityObjectToClipPos(v.vertex);
					o.uv = v.texcoord.xy;
					o.depth = o.pos.zw;
					return o;
				}

				uniform sampler2D _MainTex;
				uniform float _Cutoff;

				float4 frag(v2f i) : COLOR
				{
					float4 texcol = tex2D(_MainTex, i.uv);
					float alpha = texcol.a * i.color.a;
					clip(alpha - _Cutoff);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}

		SubShader
		{
			Tags { "RenderType"="Grass" }

			Pass
			{
				Cull Off

				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"
				#include "TerrainEngine.cginc"

				struct v2f
				{
					float4 pos : SV_POSITION;
					float4 color : COLOR;
					float2 uv : TEXCOORD0;
					float2 depth : TEXCOORD1;
				};
				
				v2f vert(appdata_full v)
				{
					v2f o;
					WavingGrassVert(v);
					o.color = v.color;
					o.pos = UnityObjectToClipPos(v.vertex);
					o.uv = v.texcoord;
					o.depth = o.pos.zw;
					return o;
				}

				uniform sampler2D _MainTex;
				uniform float _Cutoff;

				float4 frag(v2f i) : COLOR
				{
					float4 texcol = tex2D(_MainTex, i.uv);
					float alpha = texcol.a * i.color.a;
					clip(alpha - _Cutoff);
					return i.depth.x / i.depth.y;
				}
				ENDCG
			}
		}
	}

	Fallback Off
}