100 lines
2.0 KiB
Plaintext
100 lines
2.0 KiB
Plaintext
/*
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Author:gzg
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Date:2021-08-23
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Desc:盒式模糊
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*/
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Shader "Hidden/Ares/PostEffect/BoxBlur"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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}
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CGINCLUDE
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv0 : TEXCOORD0;
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float4 vertex : SV_POSITION;
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float4 uv1 : TEXCOORD1;
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float4 uv2 : TEXCOORD2;
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float4 uv3 : TEXCOORD3;
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};
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sampler2D _MainTex;
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float4 _MainTex_ST;
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float4 _MainTex_TexelSize;
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v2f vertHorizontal(appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv0 = TRANSFORM_TEX(v.uv, _MainTex);
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float t = _MainTex_TexelSize.x;
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float4 offset = float4(t,0,-t,0);
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o.uv1 = o.uv0.xyxy + offset;
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o.uv2 = o.uv1 + offset;
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o.uv3 = o.uv2 + offset;
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return o;
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}
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v2f vertVertical(appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv0 = TRANSFORM_TEX(v.uv, _MainTex);
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float t = _MainTex_TexelSize.y;
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float4 offset = float4(0,t,0,-t) ;
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o.uv1 = o.uv0.xyxy + offset;
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o.uv2 = o.uv1 + offset;
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o.uv3 = o.uv2 + offset;
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return o;
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}
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//gauss
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static const half curve[4] = { 0.324, 0.232, 0.0855, 0.0205 };
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//avg
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//static const half curve[4] = { 0.142857, 0.142857, 0.142857, 0.142857 };
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fixed4 frag(v2f i) : SV_Target
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{
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fixed4 col = tex2D(_MainTex, i.uv0) * curve[0];
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col += tex2D(_MainTex, i.uv1.xy) * curve[1];
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col += tex2D(_MainTex, i.uv1.zw) * curve[1];
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col += tex2D(_MainTex, i.uv2.xy) * curve[2];
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col += tex2D(_MainTex, i.uv2.zw) * curve[2];
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col += tex2D(_MainTex, i.uv3.xy) * curve[3];
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col += tex2D(_MainTex, i.uv3.zw) * curve[3];
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return col;
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}
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ENDCG
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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LOD 100
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Pass
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{
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//0
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CGPROGRAM
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#pragma vertex vertHorizontal
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#pragma fragment frag
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ENDCG
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}
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Pass
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{
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//1
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CGPROGRAM
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#pragma vertex vertVertical
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#pragma fragment frag
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ENDCG
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}
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}
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}
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