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

//Unity's base unlit shader adapted for emulated mipmaps

// Unlit alpha-blended shader.
// - no lighting
// - no lightmap support
// - no per-material color

Shader "Emulated Mipmap/Unlit Transparent" {
Properties {
	_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
}

SubShader {
	Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
	LOD 100

	ZWrite Off
	Blend SrcAlpha OneMinusSrcAlpha

	Pass {
		CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma multi_compile_fog
			#pragma target 3.0

			#include "UnityCG.cginc"
			#include "./MipSample.cginc"

			struct appdata_t {
				float4 vertex : POSITION;
				float2 texcoord : TEXCOORD0;
			};

			struct v2f {
				float4 vertex : SV_POSITION;
				half2 texcoord : TEXCOORD0;
				UNITY_FOG_COORDS(1)
			};

			sampler2D _MainTex;
			float4 _MainTex_ST;
			float4 _MainTex_TexelSize;

			v2f vert (appdata_t v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}

			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 col = mipSample(_MainTex, i.texcoord, _MainTex_TexelSize.zw, 10, 1);
				UNITY_APPLY_FOG(i.fogCoord, col);
				return col;
			}
		ENDCG
	}
}

}