Shader "BF/PostEffect/FastBlur"
{
    Properties
    {
        _MainTex("MainTex", 2D) = "white"{}
        _FastTex1("Tex1", 2D) = "white"{}
        _FastTex2("Tex2", 2D) = "white"{}
    }
    SubShader
    {
        CGINCLUDE
        #include "UnityCG.cginc"

        sampler2D _MainTex;
        sampler2D _FastTex1;
        sampler2D _FastTex2;

        struct a2v
        {
            float4 pos : POSITION;
            float4 uv : TEXCOORD0;
        };

        struct v2f
        {
            float4 pos : SV_POSITION;
            half2 uv : TEXCOORD0;
        };

        v2f vert(a2v v)
        {
            v2f o;
            o.pos = UnityObjectToClipPos(v.pos);
            o.uv = v.uv.xy;
            return o;
        }

        fixed4 frag(v2f f) : SV_TARGET
        {
            fixed4 o;
            o = tex2D(_MainTex, f.uv) * 0.25;
            o += tex2D(_FastTex1, f.uv) * 0.5;
            o += tex2D(_FastTex2, f.uv);
            o = o / 1.75;
            return o;
        }
        ENDCG

        Pass
        {
            NAME "Default"
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            ENDCG
        }
    }
}