Shader "Game/ImageGray"
{
	Properties
	{
		_MainTex("MainTex", 2D) = "black" {}
	}

	SubShader
	{
			LOD 200
			Tags
			{
				"Queue" = "Transparent"
				"IgnoreProjector" = "True"
				"RenderType" = "Transparent"
			}

			Pass
			{
				Cull Off
				Lighting Off
				ZWrite Off
				Fog{ Mode Off }
			Blend SrcAlpha OneMinusSrcAlpha

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

			sampler2D _MainTex;
			float4 _MainTex_ST;

			struct appdata_t
			{
				float4 vertex : POSITION;
				float2 texcoord : TEXCOORD0;
				fixed4 color : COLOR;
			};

			struct v2f
			{
				float4 vertex : SV_POSITION;
				half2 texcoord : TEXCOORD0;
				fixed4 color : COLOR;
			};

			v2f o;

			v2f vert(appdata_t v)
			{
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.texcoord = v.texcoord;
				o.color = v.color;
				return o;
			}

			fixed4 frag(v2f i) : COLOR
			{
				fixed4 col;
				col = tex2D(_MainTex, i.texcoord);
				col.rgb = dot(col.rgb, fixed3(.222,.707,.071));
				return col;
			}
			ENDCG
		}
	}
		FallBack "Diffuse"
}